Restructure DB & UI, pt.1

.gitignore

@@ -18,4 +18,4 @@ captures
 !*.xcworkspace/contents.xcworkspacedata
 **/xcshareddata/WorkspaceSettings.xcsettings
 **/grader.db
-**/*.backup
+**/*.backup

composeApp/build.gradle.kts

@@ -7,12 +7,17 @@ plugins {
 }
 
 kotlin {
-    jvm("desktop")
+    compilerOptions {
+        freeCompilerArgs.add("-Xcontext-parameters")
+    }
+
+    jvm("desktop") {}
     
     sourceSets {
         val desktopMain by getting
-        
-        commonMain.dependencies {
+
+        desktopMain.dependencies {
+            implementation(compose.desktop.currentOs)
             implementation(compose.runtime)
             implementation(compose.foundation)
             implementation(compose.material)
@@ -22,16 +27,13 @@ kotlin {
             implementation(libs.androidx.lifecycle.viewmodel)
             implementation(libs.androidx.lifecycle.runtime.compose)
             implementation(libs.material3.core)
-            implementation(libs.material.icons)
             implementation(libs.sl4j)
-        }
-        desktopMain.dependencies {
-            implementation(compose.desktop.currentOs)
             implementation(libs.kotlinx.coroutines.swing)
             implementation(libs.exposed.core)
             implementation(libs.exposed.jdbc)
             implementation(libs.exposed.dao)
             implementation(libs.exposed.migration)
+            implementation(libs.exposed.migration.jdbc)
             implementation(libs.exposed.kotlin.datetime)
             implementation(libs.sqlite)
             implementation(libs.material3.desktop)
@@ -40,6 +42,9 @@ kotlin {
             implementation(libs.filekit.dialogs)
             implementation(libs.filekit.dialogs.compose)
             implementation(libs.filekit.coil)
+            implementation(libs.directories)
+            implementation(libs.androidx.lifecycle.viewmodel.compose)
+            implementation(libs.compose.backhandler)
         }
     }
 }
@@ -52,6 +57,7 @@ compose.desktop {
         nativeDistributions {
             targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
             packageName = "com.jaytux.grader"
+            mainClass = "com.jaytux.grader.MainKt"
             packageVersion = "1.0.0"
             includeAllModules = true
 

composeApp/src/desktopMain/kotlin/com/jaytux/grader/App.kt

@@ -1,43 +1,37 @@
 package com.jaytux.grader
 
-import androidx.compose.foundation.layout.*
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.unit.dp
-import com.jaytux.grader.ui.ChevronLeft
-import com.jaytux.grader.ui.CoursesView
-import com.jaytux.grader.ui.toDp
-import com.jaytux.grader.viewmodel.CourseListState
-import org.jetbrains.compose.ui.tooling.preview.Preview
+import com.jaytux.grader.data.v2.BaseAssignment
+import com.jaytux.grader.data.v2.Course
+import com.jaytux.grader.data.v2.Edition
+import com.jaytux.grader.ui.EditionTitle
+import com.jaytux.grader.ui.EditionView
+import com.jaytux.grader.ui.GroupsGradingTitle
+import com.jaytux.grader.ui.GroupsGradingView
+import com.jaytux.grader.ui.HomeTitle
+import com.jaytux.grader.ui.HomeView
+import com.jaytux.grader.ui.PeerEvalsGradingTitle
+import com.jaytux.grader.ui.PeerEvalsGradingView
+import com.jaytux.grader.ui.SolosGradingTitle
+import com.jaytux.grader.ui.SolosGradingView
+import com.jaytux.grader.viewmodel.Navigator
 
-data class UiRoute(val heading: String, val content: @Composable (push: (UiRoute) -> Unit) -> Unit)
+object Home : Navigator.IDestination
+data class EditionDetail(val ed: Edition, val course: Course) : Navigator.IDestination
+data class GroupGrading(val course: Course, val edition: Edition, val assignment: BaseAssignment) : Navigator.IDestination
+data class SoloGrading(val course: Course, val edition: Edition, val assignment: BaseAssignment) : Navigator.IDestination
+data class PeerEvalGrading(val course: Course, val edition: Edition, val assignment: BaseAssignment) : Navigator.IDestination
 
 @Composable
-@Preview
 fun App() {
     MaterialTheme {
-        val courseList = CourseListState()
-        var stack by remember {
-            val start = UiRoute("Courses Overview") { CoursesView(courseList, it) }
-            mutableStateOf(listOf(start))
-        }
-
-        Column {
-            Surface(Modifier.fillMaxWidth(), color = MaterialTheme.colorScheme.primary, tonalElevation = 10.dp, shadowElevation = 10.dp) {
-                Row(Modifier.padding(10.dp)) {
-                    IconButton({ stack = stack.toMutableList().also { it.removeLast() } }, enabled = stack.size >= 2) {
-                        Icon(ChevronLeft, "Back", Modifier.size(MaterialTheme.typography.headlineLarge.fontSize.toDp()))
-                    }
-                    Text(stack.last().heading, Modifier.align(Alignment.CenterVertically), style = MaterialTheme.typography.headlineLarge)
-                }
-            }
-            Surface(Modifier.fillMaxSize()) {
-                Box {
-                    stack.last().content { stack += (it) }
-                }
-            }
+        Navigator.NavHost(Home) {
+            composable<Home>({ HomeTitle() }) { _, token -> HomeView(token) }
+            composable<EditionDetail>({ EditionTitle(it) }) { data, token -> EditionView(data, token) }
+            composable<GroupGrading>({ GroupsGradingTitle(it) }) { data, token -> GroupsGradingView(data, token) }
+            composable<SoloGrading>({ SolosGradingTitle(it) }) { data, token -> SolosGradingView(data, token) }
+            composable<PeerEvalGrading>({ PeerEvalsGradingTitle(it) }) { data, token -> PeerEvalsGradingView(data, token) }
         }
     }
 }

composeApp/src/desktopMain/kotlin/com/jaytux/grader/Either.kt

@@ -0,0 +1,48 @@
+package com.jaytux.grader
+
+sealed class Either<out E , out V> {
+    class Error<E>(val error: E) : Either<E, Nothing>() {
+        override fun toString(): String = "Error($error)"
+    }
+    class Value<V>(val value: V) : Either<Nothing, V>() {
+        override fun toString(): String = "Value($value)"
+    }
+
+    fun isError() = this is Error<E>
+    fun isValue() = this is Value<V>
+
+    fun <R> map(f: (V) -> R) = when(this) {
+        is Error -> this
+        is Value -> Value(f(value))
+    }
+
+    suspend fun <R> mapSuspend(f: suspend (V) -> R) = when(this) {
+        is Error -> this
+        is Value -> Value(f(value))
+    }
+
+    fun <R> mapError(f: (E) -> R) = when(this) {
+        is Error -> Error(f(error))
+        is Value -> this
+    }
+
+    suspend fun <R> mapErrorSuspend(f: suspend (E) -> R) = when(this) {
+        is Error -> Error(f(error))
+        is Value -> this
+    }
+
+    fun <R> fold(fError: (E) -> R, fValue: (V) -> R): R = when(this) {
+        is Error -> fError(error)
+        is Value -> fValue(value)
+    }
+
+    suspend fun <R> foldSuspend(fError: suspend (E) -> R, fValue: suspend (V) -> R): R = when(this) {
+        is Error -> fError(error)
+        is Value -> fValue(value)
+    }
+
+    companion object {
+        fun <E> E.error(): Either<E, Nothing> = Error(this)
+        fun <V> V.value(): Either<Nothing, V> = Value(this)
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/Util.kt

@@ -1,10 +1,16 @@
 package com.jaytux.grader
 
+import androidx.compose.ui.platform.ClipEntry
+import androidx.compose.ui.platform.Clipboard
 import androidx.compose.ui.platform.ClipboardManager
 import androidx.compose.ui.text.AnnotatedString
+import com.jaytux.grader.data.Database
 import com.mohamedrejeb.richeditor.model.RichTextState
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.launch
+import java.time.Clock
+import java.time.LocalDateTime
+import java.util.prefs.Preferences
 
 fun String.maxN(n: Int): String {
     return if (this.length > n) {
@@ -14,10 +20,25 @@ fun String.maxN(n: Int): String {
     }
 }
 
-fun RichTextState.toClipboard(clip: ClipboardManager) {
+suspend fun RichTextState.toClipboard(clip: ClipboardManager) {
     clip.setText(AnnotatedString(this.toMarkdown()))
 }
 
-fun RichTextState.loadClipboard(clip: ClipboardManager, scope: CoroutineScope) {
+suspend fun RichTextState.loadClipboard(clip: ClipboardManager, scope: CoroutineScope) {
     scope.launch { setMarkdown(clip.getText()?.text ?: "") }
-}
+}
+
+object Preferences {
+    private val _p = Preferences.userNodeForPackage(this::class.java)
+
+    operator fun get(key: String): String? = _p.get(key, null)
+    operator fun set(key: String, value: String) {
+        _p.put(key, value)
+    }
+
+    var exportPath
+        get() = get("exportPath") ?: System.getProperty("user.home") + "/grader_export"
+        set(value) { set("exportPath", value) }
+}
+
+infix fun <T1, T2, T3> Pair<T1, T2>.app(x: T3) = Triple(first, second, x)

composeApp/src/desktopMain/kotlin/com/jaytux/grader/data/DSL.kt

@@ -1,145 +0,0 @@
-package com.jaytux.grader.data
-
-import org.jetbrains.exposed.dao.id.CompositeIdTable
-import org.jetbrains.exposed.dao.id.UUIDTable
-import org.jetbrains.exposed.sql.Table
-import org.jetbrains.exposed.sql.kotlin.datetime.datetime
-
-object Courses : UUIDTable("courses") {
-    val name = varchar("name", 50).uniqueIndex()
-}
-
-object Editions : UUIDTable("editions") {
-    val courseId = reference("course_id", Courses.id)
-    val name = varchar("name", 50)
-
-    init {
-        uniqueIndex(courseId, name)
-    }
-}
-
-object Groups : UUIDTable("groups") {
-    val editionId = reference("edition_id", Editions.id)
-    val name = varchar("name", 50)
-
-    init {
-        uniqueIndex(editionId, name)
-    }
-}
-
-object Students : UUIDTable("students") {
-    val name = varchar("name", 50)
-    val contact = varchar("contact", 50)
-    val note = text("note")
-}
-
-object GroupStudents : UUIDTable("grpStudents") {
-    val groupId = reference("group_id", Groups.id)
-    val studentId = reference("student_id", Students.id)
-    val role = varchar("role", 50).nullable()
-
-    init {
-        uniqueIndex(groupId, studentId) // can't figure out how to make this a composite key
-    }
-}
-
-object EditionStudents : Table("editionStudents") {
-    val editionId = reference("edition_id", Editions.id)
-    val studentId = reference("student_id", Students.id)
-
-    override val primaryKey = PrimaryKey(studentId)
-}
-
-object GroupAssignments : UUIDTable("grpAssgmts") {
-    val editionId = reference("edition_id", Editions.id)
-    val number = integer("number").nullable()
-    val name = varchar("name", 50)
-    val assignment = text("assignment")
-    val deadline = datetime("deadline")
-    val globalCriterion = reference("global_crit", GroupAssignmentCriteria.id)
-}
-
-object GroupAssignmentCriteria : UUIDTable("grpAsCr") {
-    val assignmentId = reference("group_assignment_id", GroupAssignments.id)
-    val name = varchar("name", 50)
-    val desc = text("description")
-}
-
-object SoloAssignments : UUIDTable("soloAssgmts") {
-    val editionId = reference("edition_id", Editions.id)
-    val number = integer("number").nullable()
-    val name = varchar("name", 50)
-    val assignment = text("assignment")
-    val deadline = datetime("deadline")
-    val globalCriterion = reference("global_crit", SoloAssignmentCriteria.id)
-}
-
-object SoloAssignmentCriteria : UUIDTable("soloAsCr") {
-    val assignmentId = reference("solo_assignment_id", SoloAssignments.id)
-    val name = varchar("name", 50)
-    val desc = text("description")
-}
-
-object PeerEvaluations : UUIDTable("peerEvals") {
-    val editionId = reference("edition_id", Editions.id)
-    val number = integer("number").nullable()
-    val name = varchar("name", 50)
-}
-
-object GroupFeedbacks : CompositeIdTable("grpFdbks") {
-    val assignmentId = reference("group_assignment_id", GroupAssignments.id)
-    val criterionId = reference("criterion_id", GroupAssignmentCriteria.id)
-    val groupId = reference("group_id", Groups.id)
-    val feedback = text("feedback")
-    val grade = varchar("grade", 32)
-
-    override val primaryKey = PrimaryKey(groupId, criterionId)
-}
-
-object IndividualFeedbacks : CompositeIdTable("indivFdbks") {
-    val assignmentId = reference("group_assignment_id", GroupAssignments.id)
-    val criterionId = reference("criterion_id", GroupAssignmentCriteria.id)
-    val groupId = reference("group_id", Groups.id)
-    val studentId = reference("student_id", Students.id)
-    val feedback = text("feedback")
-    val grade = varchar("grade", 32)
-
-    override val primaryKey = PrimaryKey(studentId, criterionId)
-}
-
-object SoloFeedbacks : CompositeIdTable("soloFdbks") {
-    val assignmentId = reference("solo_assignment_id", SoloAssignments.id)
-    val criterionId = reference("criterion_id", SoloAssignmentCriteria.id)
-    val studentId = reference("student_id", Students.id)
-    val feedback = text("feedback")
-    val grade = varchar("grade", 32)
-
-    override val primaryKey = PrimaryKey(studentId, criterionId)
-}
-
-object PeerEvaluationContents : CompositeIdTable("peerEvalCnts") {
-    val peerEvaluationId = reference("peer_evaluation_id", PeerEvaluations.id)
-    val groupId = reference("group_id", Groups.id)
-    val content = text("content")
-
-    override val primaryKey = PrimaryKey(peerEvaluationId, groupId)
-}
-
-object StudentToGroupEvaluation : CompositeIdTable("stToGrEv") {
-    val peerEvaluationId = reference("peer_evaluation_id", PeerEvaluations.id)
-    val studentId = reference("student_id", Students.id)
-    val grade = varchar("grade", 32)
-    val note = text("note")
-
-    override val primaryKey = PrimaryKey(peerEvaluationId, studentId)
-}
-
-object StudentToStudentEvaluation : CompositeIdTable("stToStEv") {
-    val peerEvaluationId = reference("peer_evaluation_id", PeerEvaluations.id)
-    val studentIdFrom = reference("student_id_from", Students.id)
-    val studentIdTo = reference("student_id_to", Students.id)
-    val grade = varchar("grade", 32)
-    val note = text("note")
-
-    override val primaryKey = PrimaryKey(peerEvaluationId, studentIdFrom, studentIdTo)
-}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/data/Database.kt

@@ -1,42 +1,64 @@
 package com.jaytux.grader.data
 
-import MigrationUtils
-import org.jetbrains.exposed.sql.Database
-import org.jetbrains.exposed.sql.SchemaUtils
-import org.jetbrains.exposed.sql.and
-import org.jetbrains.exposed.sql.selectAll
-import org.jetbrains.exposed.sql.transactions.transaction
-import org.jetbrains.exposed.sql.update
+import com.jaytux.grader.app
+import com.jaytux.grader.data.v2.CategoricGrade
+import com.jaytux.grader.data.v2.CategoricGradeOption
+import com.jaytux.grader.data.v2.CategoricGradeOptions
+import com.jaytux.grader.data.v2.CategoricGrades
+import com.jaytux.grader.data.v2.Courses
+import com.jaytux.grader.data.v2.NumericGrade
+import com.jaytux.grader.data.v2.v2Tables
+import dev.dirs.ProjectDirectories
+import org.jetbrains.exposed.v1.jdbc.SchemaUtils
+import org.jetbrains.exposed.v1.jdbc.transactions.transaction
+import kotlin.getValue
+import kotlin.io.path.Path
+import kotlin.io.path.createDirectories
+import kotlin.io.path.exists
+import org.jetbrains.exposed.v1.jdbc.Database
+import org.jetbrains.exposed.v1.jdbc.batchInsert
+import org.jetbrains.exposed.v1.jdbc.transactions.TransactionManager
 
 object Database {
+    val dataDir: String = ProjectDirectories.from("com", "jaytux", "grader").dataDir.also {
+        val path = Path(it)
+        if(!path.exists()) path.createDirectories()
+    }
     val db by lazy {
-        val actual = Database.connect("jdbc:sqlite:file:./grader.db", "org.sqlite.JDBC")
-        transaction {
-            SchemaUtils.create(
-                Courses, Editions, Groups,
-                Students, GroupStudents, EditionStudents,
-                GroupAssignments, SoloAssignments, GroupAssignmentCriteria, SoloAssignmentCriteria,
-                GroupFeedbacks, IndividualFeedbacks, SoloFeedbacks,
-                PeerEvaluations, PeerEvaluationContents, StudentToStudentEvaluation,
-                StudentToGroupEvaluation
-            )
-
-            val migrate = MigrationUtils.statementsRequiredForDatabaseMigration(
-                Courses, Editions, Groups,
-                Students, GroupStudents, EditionStudents,
-                GroupAssignments, SoloAssignments, GroupAssignmentCriteria, SoloAssignmentCriteria,
-                GroupFeedbacks, IndividualFeedbacks, SoloFeedbacks,
-                PeerEvaluations, PeerEvaluationContents, StudentToStudentEvaluation,
-                StudentToGroupEvaluation,
-                withLogs = true
-            )
-
-            println(" --- Migration --- ")
-            migrate.forEach { println(it); exec(it) }
-            println(" --- End migration --- ")
+        val actual = Database.connect("jdbc:sqlite:file:${dataDir}/grader.db", "org.sqlite.JDBC")
+        transaction(actual) {
+            SchemaUtils.create(*v2Tables)
         }
+
         actual
     }
 
-    fun init() { db }
+    fun init() {
+        TransactionManager.defaultDatabase = db
+        transaction {
+            if(CategoricGrade.count() == 0L) {
+                val (pf, af) = CategoricGrades.batchInsert(listOf("Pass/Fail", "Default A-F"), shouldReturnGeneratedValues = true) {
+                    this[CategoricGrades.name] = it
+                }.map {
+                    it[CategoricGrades.id]
+                }
+
+                CategoricGradeOptions.batchInsert(
+                    listOf("Pass", "Fail").mapIndexed { idx, it -> it to pf app idx } +
+                            listOf("A (Excellent)", "B (Good)", "C (Satisfactory)", "D (Poor)", "F (Fail)").mapIndexed { idx, it -> it to af app idx }
+                ) {
+                    this[CategoricGradeOptions.option] = it.first
+                    this[CategoricGradeOptions.gradeId] = it.second
+                    this[CategoricGradeOptions.index] = it.third
+                }
+            }
+
+            if(NumericGrade.count() == 0L) {
+                NumericGrade.new {
+                    name = "Max-20"
+                    max = 20.0
+                }
+            }
+        }
+    }
 }

composeApp/src/desktopMain/kotlin/com/jaytux/grader/data/Entities.kt

@@ -1,139 +0,0 @@
-package com.jaytux.grader.data
-
-import com.jaytux.grader.data.GroupAssignment.Companion.referrersOn
-import org.jetbrains.exposed.dao.Entity
-import org.jetbrains.exposed.dao.EntityClass
-import org.jetbrains.exposed.dao.id.EntityID
-import java.util.UUID
-
-class Course(id: EntityID<UUID>) : Entity<UUID>(id) {
-    companion object : EntityClass<UUID, Course>(Courses)
-
-    var name by Courses.name
-    val editions by Edition referrersOn Editions.courseId
-}
-
-class Edition(id: EntityID<UUID>) : Entity<UUID>(id) {
-    companion object : EntityClass<UUID, Edition>(Editions)
-
-    var course by Course referencedOn Editions.courseId
-    var name by Editions.name
-    val groups by Group referrersOn Groups.editionId
-    val soloStudents by Student via EditionStudents
-    val soloAssignments by SoloAssignment referrersOn SoloAssignments.editionId
-    val groupAssignments by GroupAssignment referrersOn GroupAssignments.editionId
-    val peerEvaluations by PeerEvaluation referrersOn PeerEvaluations.editionId
-}
-
-class Group(id: EntityID<UUID>) : Entity<UUID>(id) {
-    companion object : EntityClass<UUID, Group>(Groups)
-
-    var edition by Edition referencedOn Groups.editionId
-    var name by Groups.name
-    val students by Student via GroupStudents
-    val studentRoles by GroupMember referrersOn GroupStudents.groupId
-}
-
-class GroupMember(id: EntityID<UUID>) : Entity<UUID>(id) {
-    companion object : EntityClass<UUID, GroupMember>(GroupStudents)
-
-    var student by Student referencedOn GroupStudents.studentId
-    var group by Group referencedOn GroupStudents.groupId
-    var role by GroupStudents.role
-}
-
-class Student(id: EntityID<UUID>) : Entity<UUID>(id) {
-    companion object : EntityClass<UUID, Student>(Students)
-
-    var name by Students.name
-    var note by Students.note
-    var contact by Students.contact
-    val groups by Group via GroupStudents
-    val courses by Edition via EditionStudents
-}
-
-class GroupAssignment(id: EntityID<UUID>) : Entity<UUID>(id) {
-    companion object : EntityClass<UUID, GroupAssignment>(GroupAssignments)
-
-    var edition by Edition referencedOn GroupAssignments.editionId
-    var number by GroupAssignments.number
-    var name by GroupAssignments.name
-    var assignment by GroupAssignments.assignment
-    var deadline by GroupAssignments.deadline
-    var globalCriterion by GroupAssignmentCriterion referencedOn GroupAssignments.globalCriterion
-
-    val criteria by GroupAssignmentCriterion referrersOn GroupAssignmentCriteria.assignmentId
-}
-
-class GroupAssignmentCriterion(id: EntityID<UUID>) : Entity<UUID>(id) {
-    companion object : EntityClass<UUID, GroupAssignmentCriterion>(GroupAssignmentCriteria)
-
-    var assignment by GroupAssignment referencedOn GroupAssignmentCriteria.assignmentId
-    var name by GroupAssignmentCriteria.name
-    var description by GroupAssignmentCriteria.desc
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as GroupAssignmentCriterion
-
-        if (name != other.name) return false
-        if (description != other.description) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = name.hashCode()
-        result = 31 * result + description.hashCode()
-        return result
-    }
-}
-
-class SoloAssignment(id: EntityID<UUID>) : Entity<UUID>(id) {
-    companion object : EntityClass<UUID, SoloAssignment>(SoloAssignments)
-
-    var edition by Edition referencedOn SoloAssignments.editionId
-    var number by SoloAssignments.number
-    var name by SoloAssignments.name
-    var assignment by SoloAssignments.assignment
-    var deadline by SoloAssignments.deadline
-    var globalCriterion by SoloAssignmentCriterion referencedOn SoloAssignments.globalCriterion
-
-    val criteria by SoloAssignmentCriterion referrersOn SoloAssignmentCriteria.assignmentId
-}
-
-class SoloAssignmentCriterion(id: EntityID<UUID>) : Entity<UUID>(id) {
-    companion object : EntityClass<UUID, SoloAssignmentCriterion>(SoloAssignmentCriteria)
-
-    var assignment by SoloAssignment referencedOn SoloAssignmentCriteria.assignmentId
-    var name by SoloAssignmentCriteria.name
-    var description by SoloAssignmentCriteria.desc
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as SoloAssignmentCriterion
-
-        if (name != other.name) return false
-        if (description != other.description) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = name.hashCode()
-        result = 31 * result + description.hashCode()
-        return result
-    }
-}
-
-class PeerEvaluation(id: EntityID<UUID>) : Entity<UUID>(id) {
-    companion object : EntityClass<UUID, PeerEvaluation>(PeerEvaluations)
-
-    var edition by Edition referencedOn PeerEvaluations.editionId
-    var number by PeerEvaluations.number
-    var name by PeerEvaluations.name
-}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/data/Exporter.kt

@@ -1,90 +1,118 @@
 package com.jaytux.grader.data
 
-import com.jaytux.grader.viewmodel.Assignment
-import com.jaytux.grader.viewmodel.GroupAssignmentState
-import io.github.vinceglb.filekit.PlatformFile
-
-class MdBuilder {
-    private val content = StringBuilder()
-
-    fun appendHeader(text: String, level: Int = 1) {
-        require(level in 1..6) { "Header level must be between 1 and 6" }
-        content.appendLine()
-        content.appendLine("#".repeat(level) + " $text")
-        content.appendLine()
-    }
-    fun appendMd(text: String) { content.appendLine(text) }
-    fun appendParagraph(text: String, bold: Boolean = false, italic: Boolean = false) {
-        val formattedText = buildString {
-            if (bold) append("**")
-            if (italic) append("_")
-            append(text)
-            if (italic) append("_")
-            if (bold) append("**")
-        }
-        content.appendLine(formattedText)
-        content.appendLine()
-    }
-
-    fun build(): String = content.toString()
-}
-
-fun GroupAssignmentState.LocalGFeedback.exportTo(path: PlatformFile, assignment: GroupAssignment) {
-    val builder = MdBuilder()
-    builder.appendHeader("${assignment.name} Feedback for ${group.name}")
-    if(feedback.global != null && feedback.global.grade.isNotBlank()) {
-        val global = feedback.global.grade
-        builder.appendParagraph("Overall grade: ${feedback.global.grade}", true, true)
-
-        individuals.forEach { (student, it) ->
-            val (_, data) = it
-            if(data.global != null && data.global.grade.isNotBlank() && data.global.grade != global) {
-                builder.appendParagraph("${student.name} grade: ${data.global.grade}", true, true)
-            }
-        }
-    }
-
-    fun appendFeedback(heading: String, group: GroupAssignmentState.FeedbackEntry?, byStudent: List<Pair<Student, GroupAssignmentState.FeedbackEntry>>) {
-        if(group != null || byStudent.isNotEmpty()) {
-            builder.appendHeader(heading, 2)
-            if(group != null) {
-                if(group.grade.isNotBlank()) {
-                    builder.appendParagraph("Group grade: ${group.grade}", true, true)
-                }
-                if(group.feedback.isNotBlank()) {
-                    builder.appendMd(group.feedback)
-                }
-            }
-
-            byStudent.forEach { (student, it) ->
-                if(it.grade.isNotBlank() || it.feedback.isNotBlank()) builder.appendHeader(student.name, 3)
-                if(it.grade.isNotBlank()) {
-                    builder.appendParagraph("Grade: ${it.grade}", true, true)
-                }
-                if(it.feedback.isNotBlank()) {
-                    builder.appendMd(it.feedback)
-                }
-            }
-        }
-    }
-
-    appendFeedback("Overall Feedback", feedback.global,
-        individuals.mapNotNull { it.second.second.global?.let { g -> it.first to g } }
-    )
-
-    val criteria = (feedback.byCriterion.map { (c, _) -> c } +
-        individuals.flatMap { (_, it) -> it.second.byCriterion.map { (c, _) -> c } }).distinctBy { it.id.value }
-
-    criteria.forEach { c ->
-        appendFeedback(
-            c.name,
-            feedback.byCriterion.firstOrNull { it.criterion.id == c.id }?.entry,
-            individuals.mapNotNull { (student, it) ->
-                val entry = it.second.byCriterion.firstOrNull { it.criterion.id == c.id }?.entry
-                entry?.let { student to it }
-            }
-        )
-    }
-
-    path.file.writeText(builder.build())
-}
+//class MdBuilder {
+//    private val content = StringBuilder()
+//
+//    fun appendHeader(text: String, level: Int = 1) {
+//        require(level in 1..6) { "Header level must be between 1 and 6" }
+//        content.appendLine()
+//        content.appendLine("#".repeat(level) + " $text")
+//        content.appendLine()
+//    }
+//    fun appendMd(text: String) { content.appendLine(text) }
+//    fun appendParagraph(text: String, bold: Boolean = false, italic: Boolean = false) {
+//        val formattedText = buildString {
+//            if (bold) append("**")
+//            if (italic) append("_")
+//            append(text)
+//            if (italic) append("_")
+//            if (bold) append("**")
+//        }
+//        content.appendLine(formattedText)
+//        content.appendLine()
+//    }
+//
+//    fun build(title: String, scheme: String = "dark"): String = "${prologue(title, scheme)}\n\n${content.toString()}"
+//        private fun prologue(title: String, scheme: String = "dark") = """
+//            ---
+//            title: $title
+//            date: ${Clock.System.now()}
+//            header-includes:
+//                - '<link rel="stylesheet" href="https://classless.de/classless-tiny.css" media="(prefers-color-scheme: $scheme)" />'
+//                - '<link rel="stylesheet" href="https://classless.de/addons/themes.css" media="(prefers-color-scheme: light)" />'
+//            ---
+//        """.trimIndent()
+//}
+//
+//object Exporter {
+//    private fun MdBuilder.appendGroupFeedback(assignment: GroupAssignment, it: GroupAssignmentState.LocalGFeedback) {
+//        appendHeader("${assignment.name} (group: ${it.group.name})", 1)
+//        if (it.feedback.global != null && it.feedback.global.grade.isNotBlank()) {
+//            val global = it.feedback.global.grade
+//            appendParagraph("Overall grade: ${it.feedback.global.grade}", true, true)
+//
+//            it.individuals.forEach { (student, it) ->
+//                val (_, data) = it
+//                if (data.global != null && data.global.grade.isNotBlank() && data.global.grade != global) {
+//                    appendParagraph("${student.name} grade: ${data.global.grade}", true, true)
+//                }
+//            }
+//        }
+//
+//        fun appendFeedback(
+//            heading: String,
+//            group: GroupAssignmentState.FeedbackEntry?,
+//            byStudent: List<Pair<Student, GroupAssignmentState.FeedbackEntry>>
+//        ) {
+//            if (group != null || byStudent.isNotEmpty()) {
+//                appendHeader(heading, 2)
+//                if (group != null) {
+//                    if (group.grade.isNotBlank()) {
+//                        appendParagraph("Group grade: ${group.grade}", true, true)
+//                    }
+//                    if (group.feedback.isNotBlank()) {
+//                        appendMd(group.feedback)
+//                    }
+//                }
+//
+//                byStudent.forEach { (student, it) ->
+//                    if (it.grade.isNotBlank() || it.feedback.isNotBlank()) appendHeader(student.name, 3)
+//                    if (it.grade.isNotBlank()) {
+//                        appendParagraph("Grade: ${it.grade}", true, true)
+//                    }
+//                    if (it.feedback.isNotBlank()) {
+//                        appendMd(it.feedback)
+//                    }
+//                }
+//            }
+//        }
+//
+//        appendFeedback(
+//            "Overall Feedback", it.feedback.global,
+//            it.individuals.mapNotNull { ind -> ind.second.second.global?.let { g -> ind.first to g } }
+//        )
+//
+//        val criteria = (it.feedback.byCriterion.map { (c, _) -> c } +
+//                it.individuals.flatMap { (_, x) -> x.second.byCriterion.map { (c, _) -> c } }).distinctBy { x -> x.id.value }
+//
+//        criteria.forEach { c ->
+//            appendFeedback(
+//                c.name,
+//                it.feedback.byCriterion.firstOrNull { it.criterion.id == c.id }?.entry,
+//                it.individuals.mapNotNull { (student, s) ->
+//                    val entry = s.second.byCriterion.firstOrNull { it.criterion.id == c.id }?.entry
+//                    entry?.let { student to it }
+//                }
+//            )
+//        }
+//    }
+//
+//    private fun MdBuilder.outputTo(path: Path, title: String) {
+//        val contents = build(title)
+//        val buffer = Buffer()
+//        buffer.write(contents.toByteArray())
+//        SystemFileSystem.sink(path, false).write(buffer, buffer.size)
+//    }
+//
+//    fun GroupAssignmentState.LocalGFeedback.exportTo(path: Path, assignment: GroupAssignment) {
+//        val builder = MdBuilder()
+//        builder.appendGroupFeedback(assignment, this)
+//        builder.outputTo(path, "${assignment.name} (for group ${group.name})")
+//    }
+//
+//    fun GroupAssignmentState.batchExport(dirPath: Path) {
+//        feedback.entities.value.forEach { (_, it) ->
+//            it.exportTo(dirPath / "${it.group.name} (${assignment.name}).md", assignment)
+//        }
+//    }
+//}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/data/v2/DSLv2.kt

@@ -0,0 +1,181 @@
+package com.jaytux.grader.data.v2
+
+import org.jetbrains.exposed.v1.core.dao.id.CompositeIdTable
+import org.jetbrains.exposed.v1.core.dao.id.java.UUIDTable
+import org.jetbrains.exposed.v1.datetime.datetime
+
+object Courses : UUIDTable("courses") {
+    val name = varchar("name", 50).uniqueIndex()
+}
+
+object Editions : UUIDTable("editions") {
+    val courseId = reference("course_id", Courses.id)
+    val name = varchar("name", 50)
+    val archived = bool("archived").default(false)
+
+    init {
+        uniqueIndex(courseId, name)
+    }
+}
+
+object Groups : UUIDTable("groups") {
+    val editionId = reference("edition_id", Editions.id)
+    val name = varchar("name", 50)
+
+    init {
+        uniqueIndex(editionId, name)
+    }
+}
+
+object Students : UUIDTable("students") {
+    val name = varchar("name", 50)
+    val contact = varchar("contact", 50)
+    val note = text("note")
+}
+
+object GroupStudents : UUIDTable("grpStudents") {
+    val groupId = reference("group_id", Groups.id)
+    val studentId = reference("student_id", Students.id)
+    val role = varchar("role", 50).nullable()
+
+    init {
+        uniqueIndex(groupId, studentId)
+    }
+}
+
+object EditionStudents : CompositeIdTable("editionStudents") {
+    val editionId = reference("edition_id", Editions.id)
+    val studentId = reference("student_id", Students.id)
+
+    override val primaryKey = PrimaryKey(editionId, studentId)
+}
+
+object BaseAssignments : UUIDTable("baseAssgmts") {
+    val editionId = reference("edition_id", Editions.id)
+    val name = varchar("name", 50)
+    val assignment = text("assignment")
+    val globalCriterion = reference("global_crit", Criteria.id)
+    val deadline = datetime("deadline")
+    val number = integer("number").nullable()
+    val type = enumerationByName("type", 20, AssignmentType::class)
+}
+
+object Criteria : UUIDTable("criteria") {
+    val assignmentId = reference("assignment_id", BaseAssignments.id)
+    val name = varchar("name", 50)
+    val desc = text("desc")
+    val gradeType = enumerationByName("grade_type", 20, GradeType::class)
+    val categoricGrade = reference("categoric_grade_id", CategoricGrades.id).nullable()
+    val numericGrade = reference("numeric_grade_id", NumericGrades.id).nullable()
+}
+
+object GroupAssignments : UUIDTable("grpAssgmts") {
+    val baseAssignmentId = reference("base_assignment_id", BaseAssignments.id).uniqueIndex()
+}
+
+object SoloAssignments : UUIDTable("soloAssgmts") {
+    val baseAssignmentId = reference("base_assignment_id", BaseAssignments.id).uniqueIndex()
+}
+
+object BaseFeedbacks : UUIDTable("baseFeedbacks") {
+    val criterionId = reference("criterion_id", Criteria.id)
+    val feedback = text("feedback")
+    val gradeFreeText = varchar("grade_text", 32).nullable()
+    val gradeCategoric = reference("grade_categoric", CategoricGradeOptions.id).nullable()
+    val gradeNumeric = double("grade_numeric").nullable()
+}
+
+object GroupFeedbacks : CompositeIdTable("grpFdbks") {
+    val groupId = reference("group_id", Groups.id)
+    val feedbackId = reference("feedback_id", BaseFeedbacks.id)
+
+    override val primaryKey = PrimaryKey(groupId, feedbackId)
+}
+
+object StudentOverrideFeedbacks : UUIDTable("studOvrFdbks") {
+    val groupId = reference("group_id", Groups.id)
+    val studentId = reference("student_id", Students.id)
+    val feedbackId = reference("feedback_id", BaseFeedbacks.id)
+    val overrides = reference("overrides", GroupFeedbacks.feedbackId)
+}
+
+object SoloFeedbacks : CompositeIdTable("soloFdbks") {
+    val studentId = reference("student_id", Students.id)
+    val feedbackId = reference("feedback_id", BaseFeedbacks.id)
+
+    override val primaryKey = PrimaryKey(studentId, feedbackId)
+}
+
+object PeerEvaluations : UUIDTable("peerEvals") {
+    val baseAssignmentId = reference("base_assignment_id", BaseAssignments.id).uniqueIndex()
+}
+
+object PeerEvaluationFeedbacks : CompositeIdTable("peerEvalFdbks") {
+    val groupId = reference("group_id", Groups.id)
+    val feedbackId = reference("feedback_id", BaseFeedbacks.id)
+
+    override val primaryKey = PrimaryKey(groupId, feedbackId)
+}
+
+object PeerEvaluationStudentOverrideFeedbacks : UUIDTable("peerEvalStudOvrFdbks") {
+    val groupId = reference("group_id", Groups.id)
+    val studentId = reference("student_id", Students.id)
+    val feedbackId = reference("feedback_id", BaseFeedbacks.id)
+    val overrides = reference("overrides", BaseFeedbacks.id)
+}
+
+object PeerEvaluationS2GEvaluations : UUIDTable("peerEvalS2GEvals") {
+    val peerEvalId = reference("peer_eval_id", PeerEvaluations.id)
+    val studentId = reference("student_id", Students.id)
+    val groupId = reference("group_id", Groups.id)
+    val evaluationId = reference("evaluation_id", BaseFeedbacks.id)
+
+    init {
+        uniqueIndex(peerEvalId, groupId, studentId)
+    }
+}
+
+object PeerEvaluationS2SEvaluations : UUIDTable("peerEvalS2SEvals") {
+    val peerEvalId = reference("peer_eval_id", PeerEvaluations.id)
+    val studentId = reference("student_id", Students.id)
+    val evaluatedStudentId = reference("evaluated_student_id", Students.id)
+    val evaluationId = reference("evaluation_id", BaseFeedbacks.id)
+
+    init {
+        uniqueIndex(peerEvalId, studentId, evaluatedStudentId)
+    }
+}
+
+object CategoricGrades : UUIDTable("categoricGrades") {
+    val name = varchar("name", 50).uniqueIndex()
+}
+
+object CategoricGradeOptions : UUIDTable("categoricGradeOpts") {
+    val gradeId = reference("grade_id", CategoricGrades.id)
+    val option = varchar("option", 50)
+    val index = integer("index")
+
+    init {
+        uniqueIndex(gradeId, option)
+    }
+}
+
+object NumericGrades : UUIDTable("numericGrades") {
+    val name = varchar("name", 50).uniqueIndex()
+    val max = double("max")
+}
+
+enum class GradeType {
+    CATEGORIC, NUMERIC, PERCENTAGE, NONE
+}
+
+enum class AssignmentType(val display: String) {
+    GROUP("Group Assignment"), SOLO("Individual Assignment"), PEER_EVALUATION("Peer Evaluation")
+}
+
+val v2Tables = arrayOf(
+    Courses, Editions, Groups, Students, GroupStudents, EditionStudents, BaseAssignments, Criteria, GroupAssignments,
+    SoloAssignments, BaseFeedbacks, GroupFeedbacks, StudentOverrideFeedbacks, SoloFeedbacks, PeerEvaluations,
+    PeerEvaluationFeedbacks, PeerEvaluationStudentOverrideFeedbacks, PeerEvaluationS2GEvaluations,
+    PeerEvaluationS2SEvaluations, CategoricGrades, CategoricGradeOptions, NumericGrades
+)

composeApp/src/desktopMain/kotlin/com/jaytux/grader/data/v2/Entitiesv2.kt

@@ -0,0 +1,190 @@
+package com.jaytux.grader.data.v2
+
+import org.jetbrains.exposed.v1.dao.Entity
+import org.jetbrains.exposed.v1.dao.EntityClass
+import org.jetbrains.exposed.v1.core.dao.id.EntityID
+import org.jetbrains.exposed.v1.dao.java.UUIDEntity
+import org.jetbrains.exposed.v1.dao.java.UUIDEntityClass
+import java.util.UUID
+
+class Course(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : UUIDEntityClass<Course>(Courses)
+
+    var name by Courses.name
+
+    val editions by Edition referrersOn Editions.courseId orderBy Editions.name
+}
+
+class Edition(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, Edition>(Editions)
+
+    var course by Course referencedOn Editions.courseId
+    var name by Editions.name
+    var archived by Editions.archived
+
+    val students by Student via EditionStudents orderBy Students.name
+    val groups by Group referrersOn Groups.editionId orderBy Groups.name
+    val assignments by BaseAssignment referrersOn BaseAssignments.editionId orderBy BaseAssignments.number
+}
+
+class Group(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, Group>(Groups)
+
+    var edition by Edition referencedOn Groups.editionId
+    var name by Groups.name
+
+    val students by GroupStudent referrersOn GroupStudents.groupId
+    val feedbacks by BaseFeedback via GroupFeedbacks
+}
+
+class Student(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, Student>(Students)
+
+    var name by Students.name
+    var note by Students.note
+    var contact by Students.contact
+
+    val editions by Edition via EditionStudents orderBy Editions.name
+    val groups by GroupStudent referrersOn GroupStudents.studentId
+}
+
+class GroupStudent(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, GroupStudent>(GroupStudents)
+
+    var student by Student referencedOn GroupStudents.studentId
+    var group by Group referencedOn GroupStudents.groupId
+    var role by GroupStudents.role
+}
+
+class BaseAssignment(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, BaseAssignment>(BaseAssignments)
+
+    var name by BaseAssignments.name
+    var assignment by BaseAssignments.assignment
+    var globalCriterion by Criterion referencedOn BaseAssignments.globalCriterion
+    var deadline by BaseAssignments.deadline
+    var number by BaseAssignments.number
+    var edition by Edition referencedOn BaseAssignments.editionId
+    var type by BaseAssignments.type
+
+    private val _asGroupAssignment by GroupAssignment referrersOn GroupAssignments.baseAssignmentId
+    private val _asSoloAssignment by SoloAssignment referrersOn SoloAssignments.baseAssignmentId
+    private val _asPeerEvaluation by PeerEvaluation referrersOn PeerEvaluations.baseAssignmentId
+    val asGroupAssignment get() = _asGroupAssignment.singleOrNull()
+    val asSoloAssignment get() = _asSoloAssignment.singleOrNull()
+    val asPeerEvaluation get() = _asPeerEvaluation.singleOrNull()
+
+    val criteria by Criterion referrersOn Criteria.assignmentId orderBy Criteria.name
+    val nonBaseCriteria get() = criteria.filterNot { it.id.value == globalCriterion.id.value }
+}
+
+class GroupAssignment(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, GroupAssignment>(GroupAssignments)
+
+    var base by BaseAssignment referencedOn GroupAssignments.baseAssignmentId
+}
+
+class SoloAssignment(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, SoloAssignment>(SoloAssignments)
+
+    var base by BaseAssignment referencedOn SoloAssignments.baseAssignmentId
+}
+
+class PeerEvaluation(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, PeerEvaluation>(PeerEvaluations)
+
+    var base by BaseAssignment referencedOn PeerEvaluations.baseAssignmentId
+}
+
+class CategoricGrade(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, CategoricGrade>(CategoricGrades)
+
+    var name by CategoricGrades.name
+
+    val options by CategoricGradeOption referrersOn CategoricGradeOptions.gradeId orderBy CategoricGradeOptions.index
+}
+
+class CategoricGradeOption(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, CategoricGradeOption>(CategoricGradeOptions)
+
+    var grade by CategoricGrade referencedOn CategoricGradeOptions.gradeId
+    var option by CategoricGradeOptions.option
+    var index by CategoricGradeOptions.index
+}
+
+class NumericGrade(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, NumericGrade>(NumericGrades)
+
+    var name by NumericGrades.name
+    var max by NumericGrades.max
+}
+
+class Criterion(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, Criterion>(Criteria)
+
+    var assignment by BaseAssignment referencedOn Criteria.assignmentId
+    var name by Criteria.name
+    var desc by Criteria.desc
+    var gradeType by Criteria.gradeType
+    var categoricGrade by CategoricGrade optionalReferencedOn Criteria.categoricGrade
+    var numericGrade by NumericGrade optionalReferencedOn Criteria.numericGrade
+
+    val feedbacks by BaseFeedback referrersOn BaseFeedbacks.criterionId
+}
+
+class BaseFeedback(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, BaseFeedback>(BaseFeedbacks)
+
+    var criterion by Criterion referencedOn BaseFeedbacks.criterionId
+    var feedback by BaseFeedbacks.feedback
+    var gradeFreeText by BaseFeedbacks.gradeFreeText
+    var gradeCategoric by CategoricGradeOption optionalReferencedOn BaseFeedbacks.gradeCategoric
+    var gradeNumeric by BaseFeedbacks.gradeNumeric
+
+    private val _forStudentIfSolo by Student via SoloFeedbacks
+    private val _forGroupIfGroup by Group via GroupFeedbacks
+    private val _forGroupIfPeer by Group via PeerEvaluationFeedbacks
+
+    val asSoloFeedback get() = _forStudentIfSolo.singleOrNull()
+    val asGroupFeedback get() = _forGroupIfGroup.singleOrNull()
+    val asPeerEvaluationFeedback get() = _forGroupIfPeer.singleOrNull()
+
+    val forStudentsOverrideIfGroup by StudentOverrideFeedback referrersOn StudentOverrideFeedbacks.overrides
+    val forStudentsOverrideIfPeer by PeerEvaluationStudentOverrideFeedback referrersOn PeerEvaluationStudentOverrideFeedbacks.overrides
+}
+
+class StudentOverrideFeedback(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, StudentOverrideFeedback>(StudentOverrideFeedbacks)
+
+    var group by Group referencedOn StudentOverrideFeedbacks.groupId
+    var student by Student referencedOn StudentOverrideFeedbacks.studentId
+    var feedback by BaseFeedback referencedOn StudentOverrideFeedbacks.feedbackId
+    var overrides by BaseFeedback referencedOn StudentOverrideFeedbacks.overrides
+}
+
+class PeerEvaluationStudentOverrideFeedback(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, PeerEvaluationStudentOverrideFeedback>(PeerEvaluationStudentOverrideFeedbacks)
+
+    var group by Group referencedOn PeerEvaluationStudentOverrideFeedbacks.groupId
+    var student by Student referencedOn PeerEvaluationStudentOverrideFeedbacks.studentId
+    var feedback by BaseFeedback referencedOn PeerEvaluationStudentOverrideFeedbacks.feedbackId
+    var overrides by BaseFeedback referencedOn PeerEvaluationStudentOverrideFeedbacks.overrides
+}
+
+class PeerEvaluationS2G(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, PeerEvaluationS2G>(PeerEvaluationS2GEvaluations)
+
+    var peerEvaluation by PeerEvaluation referencedOn PeerEvaluationS2GEvaluations.peerEvalId
+    var student by Student referencedOn PeerEvaluationS2GEvaluations.studentId
+    var group by Group referencedOn PeerEvaluationS2GEvaluations.groupId
+    var evaluation by BaseFeedback referencedOn PeerEvaluationS2GEvaluations.evaluationId
+}
+
+class PeerEvaluationS2S(id: EntityID<UUID>) : UUIDEntity(id) {
+    companion object : EntityClass<UUID, PeerEvaluationS2S>(PeerEvaluationS2SEvaluations)
+
+    var peerEvaluation by PeerEvaluation referencedOn PeerEvaluationS2SEvaluations.peerEvalId
+    var student by Student referencedOn PeerEvaluationS2SEvaluations.studentId
+    var evaluatedStudent by Student referencedOn PeerEvaluationS2SEvaluations.evaluatedStudentId
+    var evaluation by BaseFeedback referencedOn PeerEvaluationS2SEvaluations.evaluationId
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/data/v2/uml.md

@@ -0,0 +1,157 @@
+```mermaid
+erDiagram
+    COURSES {
+        uuid id PK
+        string name
+    }
+    
+    EDITIONS {
+        uuid id PK
+        uuid courseId FK
+        string name
+    }
+    COURSES ||--o{ EDITIONS : has
+    
+    GROUPS {
+        uuid id PK
+        uuid editionId FK
+        string name
+    }
+    EDITIONS ||--o{ GROUPS : has
+    
+    STUDENTS {
+       uuid id PK
+        string name
+        string contact
+        string note
+    }
+    EDITIONS }o--o{ STUDENTS : "has (through edition_students)"
+    
+    GROUP_STUDENTS {
+        uuid id PK
+        uuid groupId FK
+        uuid studentId FK
+        maybe(string) role
+    }
+    STUDENTS ||--o{ GROUP_STUDENTS : belongs_to
+    GROUPS ||--o{ GROUP_STUDENTS : has
+    
+    BASE_ASSIGNMENTS {
+        uuid id PK
+        uuid editionId FK
+        string name
+        string assignment
+        uuid globalCriterion FK
+        datetime deadline
+        maybe(int) number
+    }
+    EDITIONS ||--o{ BASE_ASSIGNMENTS : has
+    BASE_ASSIGNMENTS ||--|| CRITERIA : "global/main criterion"
+    
+    CRITERIA {
+        uuid id PK
+        uuid assignmentId FK
+        string name
+        string desc
+        GradeType gradeType
+        maybe(uuid) categoricGrade FK
+        maybe(uuid) numericGrade FK
+    }
+    CRITERIA ||--o{ BASE_ASSIGNMENTS : belongs_to
+    CRITERIA o|--o{ CATEGORIC_GRADES : "if categoric"
+    CRITERIA o|--o{ NUMERIC_GRADES : "if numeric"
+    
+    GROUP_ASSIGNMENTS {
+        uuid id PK
+        uuid baseAssignmentId FK
+    }
+    BASE_ASSIGNMENTS ||--o{ GROUP_ASSIGNMENTS : is
+    
+    SOLO_ASSIGNMENTS {
+        uuid id PK
+        uuid baseAssignmentId FK
+    }
+    BASE_ASSIGNMENTS ||--o{ SOLO_ASSIGNMENTS : is
+    
+    BASE_FEEDBACKS {
+        uuid id PK
+        uuid criterionId FK
+        string feedback
+        maybe(string) gradeFreeText
+        maybe(uuid) gradeCategoric FK
+        maybe(double) gradeNumeric
+    }
+    CRITERIA ||--o{ BASE_FEEDBACKS : has
+    GROUPS }o--o{ BASE_FEEDBACKS : "has (through group_feedbacks)"
+    STUDENTS }o--o{ BASE_FEEDBACKS : "has (through solo_feedbacks)"
+    CATEGORIC_GRADES |o--o{ BASE_FEEDBACKS : "if categoric"
+    
+    STUDENT_OVERRIDE_FEEDBACKS {
+        uuid id PK
+        uuid groupId FK
+        uuid studentId FK
+        uuid feedbackId FK
+    }
+    GROUPS }o--|| STUDENT_OVERRIDE_FEEDBACKS : "original feedback"
+    STUDENTS }o--|| STUDENT_OVERRIDE_FEEDBACKS : "overridden for"
+    BASE_FEEDBACKS ||--o{ STUDENT_OVERRIDE_FEEDBACKS : has
+    
+    PEER_EVALUATIONS {
+        uuid id PK
+        uuid baseAssignmentId FK
+    }
+    BASE_ASSIGNMENTS ||--o{ PEER_EVALUATIONS : has
+    GROUPS }o--o{ PEER_EVALUATIONS : "has (through peer_evaluation_groups)"
+    
+    PEER_EVALUATION_STUDENT_OVERRIDE_FEEDBACKS  {
+        uuid id PK
+        uuid groupId FK
+        uuid studentId FK
+        uuid feedbackId FK
+    }
+    GROUPS }o--|| PEER_EVALUATION_STUDENT_OVERRIDE_FEEDBACKS : "original feedback"
+    STUDENTS }o--|| PEER_EVALUATION_STUDENT_OVERRIDE_FEEDBACKS : "overridden for"
+    BASE_FEEDBACKS ||--o{ PEER_EVALUATION_STUDENT_OVERRIDE_FEEDBACKS : has
+    
+    PEER_EVALUATION_S2G_EVALUATIONS {
+        uuid id PK
+        uuid peerEvalId FK
+        uuid studentId FK
+        uuid groupId FK
+        uuid evaluationId FK
+    }
+    PEER_EVALUATIONS }o--|| PEER_EVALUATION_S2G_EVALUATIONS : has
+    STUDENTS }o--|| PEER_EVALUATION_S2G_EVALUATIONS : "evaluates"
+    GROUPS }o--|| PEER_EVALUATION_S2G_EVALUATIONS : "is evaluated"
+    BASE_FEEDBACKS ||--o{ PEER_EVALUATION_S2G_EVALUATIONS : "evaluation"
+    
+    PEER_EVALUATION_S2S_EVALUATIONS {
+        uuid id PK
+        uuid peerEvalId FK
+        uuid studentId FK
+        uuid evaluatedStudentId FK
+        uuid evaluationId FK
+    }
+    PEER_EVALUATIONS }o--|| PEER_EVALUATION_S2S_EVALUATIONS : has
+    STUDENTS }o--|| PEER_EVALUATION_S2S_EVALUATIONS : "evaluates"
+    STUDENTS }o--|| PEER_EVALUATION_S2S_EVALUATIONS : "is evaluated"
+    BASE_FEEDBACKS ||--o{ PEER_EVALUATION_S2S_EVALUATIONS : "evaluation"
+    
+    CATEGORIC_GRADES {
+        uuid id PK
+        string name
+    }
+    
+    CATEGORIC_GRADE_OPTIONS {
+        uuid id PK
+        uuid gradeId FK
+        string option
+    }
+    CATEGORIC_GRADES ||--o{ CATEGORIC_GRADE_OPTIONS : has
+    
+    NUMERIC_GRADES {
+        uuid id PK
+        string name
+        double max
+    }
+```

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/AssignmentsView.kt

@@ -0,0 +1,500 @@
+package com.jaytux.grader.ui
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontStyle
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.DpSize
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.window.*
+import com.jaytux.grader.GroupGrading
+import com.jaytux.grader.PeerEvalGrading
+import com.jaytux.grader.SoloGrading
+import com.jaytux.grader.data.v2.AssignmentType
+import com.jaytux.grader.viewmodel.EditionVM
+import com.jaytux.grader.viewmodel.Navigator
+import com.jaytux.grader.viewmodel.UiGradeType
+import com.mohamedrejeb.richeditor.model.rememberRichTextState
+import kotlinx.coroutines.launch
+import kotlinx.datetime.*
+import kotlinx.datetime.format.MonthNames
+import kotlinx.datetime.format.char
+import kotlin.time.Instant
+
+@Composable
+fun AssignmentsView(vm: EditionVM, token: Navigator.NavToken) = Row(Modifier.fillMaxSize()) {
+    val assignments by vm.assignmentList.entities
+    val focus by vm.focusIndex
+    val scope = rememberCoroutineScope()
+
+    val descRtf = rememberRichTextState()
+    val assignment = remember(assignments, focus) {
+        assignments.getOrNull(focus)?.also {
+            scope.launch { descRtf.setMarkdown(it.global.criterion.desc) }
+        }
+    }
+
+    var updatingDeadline by remember { mutableStateOf(false) }
+    var addingRubric by remember { mutableStateOf(false) }
+    var editingRubric by remember { mutableStateOf(-1) }
+    var updatingGrade by remember { mutableStateOf(false) }
+
+    val navToGrading = lambda@{
+        if(assignment == null) return@lambda
+        when(assignment.assignment.type) {
+            AssignmentType.GROUP -> token.navTo(GroupGrading(vm.course, vm.edition, assignment.assignment))
+            AssignmentType.SOLO -> token.navTo(SoloGrading(vm.course, vm.edition, assignment.assignment))
+            AssignmentType.PEER_EVALUATION -> token.navTo(PeerEvalGrading(vm.course, vm.edition, assignment.assignment))
+        }
+    }
+
+    Surface(Modifier.weight(0.25f).fillMaxHeight(), tonalElevation = 7.dp) {
+        ListOrEmpty(assignments, { Text("No groups yet.") }) { idx, it ->
+            QuickAssignment(idx, it, vm)
+        }
+    }
+
+    Surface(Modifier.weight(0.75f).fillMaxHeight(), tonalElevation = 1.dp) {
+        if (assignment == null) {
+            Box(Modifier.fillMaxSize()) {
+                Text("Select an assignment to see details.", Modifier.padding(10.dp).align(Alignment.Center), fontStyle = FontStyle.Italic)
+            }
+        } else {
+            Column(Modifier.padding(10.dp)) {
+                Text(assignment.assignment.name, style = MaterialTheme.typography.headlineMedium)
+                Text("Deadline: ${assignment.assignment.deadline.format(fmt)}", Modifier.padding(top = 5.dp).clickable { updatingDeadline = true }, fontStyle = FontStyle.Italic)
+                Row {
+                    Text("${assignment.assignment.type.display} using grading ", Modifier.align(Alignment.CenterVertically))
+                    Surface(shape = MaterialTheme.shapes.small, tonalElevation = 10.dp) {
+                        Box(Modifier.clickable { updatingGrade = true }.padding(3.dp)) {
+                            Text(when(val t = assignment.global.gradeType){
+                                is UiGradeType.Categoric -> t.grade.name
+                                UiGradeType.FreeText -> "by free-form grades"
+                                is UiGradeType.Numeric -> t.grade.name
+                                UiGradeType.Percentage -> "by percentages"
+                            })
+                        }
+                    }
+                }
+                Row {
+                    Column(Modifier.weight(0.75f)) {
+                        Row {
+                            Text("Description:", style = MaterialTheme.typography.headlineSmall, modifier = Modifier.padding(top = 10.dp).weight(1f))
+                            Button({ vm.setDesc(assignment, descRtf.toMarkdown()) }) {
+                                Text("Update")
+                            }
+                        }
+                        Spacer(Modifier.height(10.dp))
+                        RichTextField(descRtf)
+                    }
+                    Spacer(Modifier.width(10.dp))
+                    Surface(Modifier.weight(0.25f), color = Color.White) {
+                        Column(Modifier.padding(15.dp)) {
+                            Row {
+                                Text("Grading Rubrics", Modifier.weight(1f), style = MaterialTheme.typography.headlineSmall)
+                                IconButton({ addingRubric = true }) {
+                                    Icon(CirclePlus, "Add grading rubric")
+                                }
+                            }
+                            Spacer(Modifier.height(10.dp))
+                            LazyColumn(Modifier.weight(1f)) {
+                                itemsIndexed(assignment.criteria) { idx, it ->
+                                    Row(Modifier.padding(5.dp)) {
+                                        Column(Modifier.weight(1f)) {
+                                            Text(it.criterion.name)
+                                            Text(it.criterion.desc, Modifier.padding(start = 10.dp), fontStyle = FontStyle.Italic)
+                                        }
+                                        IconButton({ editingRubric = idx }, Modifier.align(Alignment.Top)) {
+                                            Icon(Edit, "Edit grading rubric")
+                                        }
+                                    }
+                                }
+                            }
+                            Spacer(Modifier.height(10.dp))
+                            Button({ navToGrading() }, Modifier.fillMaxWidth()) {
+                                Text("Go to grading")
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    if(updatingDeadline) {
+        if(assignment == null) updatingDeadline = false
+        else {
+            DeadlinePicker(assignment.assignment.deadline, { updatingDeadline = false }) {
+                vm.modAssignment(assignment.assignment, null, it)
+            }
+        }
+    }
+
+    if(addingRubric) {
+        if(assignment == null) addingRubric = false
+        else {
+            AddCriterionDialog(null, vm, assignment.criteria.map { it.criterion.name }, { addingRubric = false }) { name, desc, type ->
+                vm.mkCriterion(assignment.assignment, name, desc, type)
+            }
+        }
+    }
+
+    if(editingRubric != -1) {
+        if(assignment == null) editingRubric = -1
+        else {
+            AddCriterionDialog(assignment.criteria[editingRubric], vm, assignment.criteria.map { it.criterion.name }, { editingRubric = -1 }) { name, desc, type ->
+                vm.modCriterion(assignment.criteria[editingRubric].criterion, name, desc, type)
+            }
+        }
+    }
+
+    if(updatingGrade) {
+        if(assignment == null) updatingGrade = false
+        else {
+            SetGradingDialog(assignment.assignment.name, assignment.global.gradeType, vm, { updatingGrade = false }) { type ->
+                vm.modCriterion(assignment.global.criterion, null, null, type)
+            }
+        }
+    }
+}
+
+val fmt = LocalDateTime.Format {
+    date(LocalDate.Format {
+        day(); char(' '); monthName(MonthNames.ENGLISH_ABBREVIATED); char(' '); year()
+    })
+    char(' ')
+    time(LocalTime.Format {
+        amPmHour(); char(':'); minute(); char(' '); amPmMarker("AM", "PM")
+    })
+}
+
+@Composable
+fun QuickAssignment(idx: Int, assignment: EditionVM.AssignmentData, vm: EditionVM) {
+    val focus by vm.focusIndex
+    Surface(tonalElevation = if(focus == idx) 15.dp else 0.dp, shape = MaterialTheme.shapes.small) {
+        Column(Modifier.fillMaxWidth().clickable { vm.focus(idx) }.padding(10.dp)) {
+            Text(assignment.assignment.name, fontWeight = FontWeight.Bold)
+            Text("Deadline: ${assignment.assignment.deadline.format(fmt)}", Modifier.padding(start = 10.dp), fontStyle = FontStyle.Italic)
+        }
+    }
+}
+
+@Composable
+fun AddAssignmentDialog(label: String, taken: List<String>, onClose: () -> Unit, current: String = "", onSave: (String, AssignmentType) -> Unit) = DialogWindow(
+    onCloseRequest = onClose,
+    state = rememberDialogState(size = DpSize(750.dp, 300.dp), position = WindowPosition(Alignment.Center))
+) {
+    val focus = remember { FocusRequester() }
+
+    Surface(Modifier.fillMaxSize()) {
+        Box(Modifier.fillMaxSize().padding(10.dp)) {
+            var type by remember { mutableStateOf(AssignmentType.SOLO) }
+            var name by remember(current) { mutableStateOf(current) }
+            Column(Modifier.align(Alignment.Center)) {
+                SingleChoiceSegmentedButtonRow(Modifier.fillMaxWidth()) {
+                    AssignmentType.entries.forEachIndexed { idx, it ->
+                        SegmentedButton(
+                            shape = SegmentedButtonDefaults.itemShape(idx, AssignmentType.entries.size),
+                            selected = type == it,
+                            onClick = { type = it }
+                        ) { Text(it.display) }
+                    }
+                }
+                OutlinedTextField(name, { name = it }, Modifier.fillMaxWidth().focusRequester(focus), label = { Text(label) }, isError = name in taken)
+                CancelSaveRow(name.isNotBlank() && name !in taken, onClose) {
+                    onSave(name, type)
+                    onClose()
+                }
+            }
+        }
+    }
+
+    LaunchedEffect(Unit) { focus.requestFocus() }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun DeadlinePicker(deadline: LocalDateTime, onDismiss: () -> Unit, onSave: (LocalDateTime) -> Unit) {
+    val state = rememberDatePickerState(deadline.date.toJavaLocalDate())
+    val (h, m) = deadline.time.let { it.hour to it.minute }
+    val time = rememberTimePickerState(h, m)
+
+    val reconstruct = {
+        val inst = Instant.fromEpochMilliseconds(state.selectedDateMillis!!)
+        val date = inst.toLocalDateTime(TimeZone.currentSystemDefault())
+        LocalDateTime(date.date, LocalTime(time.hour, time.minute))
+    }
+
+    Dialog(onDismiss, DialogProperties()) {
+        Surface(tonalElevation = 5.dp, shape = MaterialTheme.shapes.extraLarge) {
+            Column(Modifier.padding(15.dp)) {
+                DatePicker(state, Modifier.fillMaxWidth())
+                TimeInput(time, Modifier.fillMaxWidth())
+                Row {
+                    Spacer(Modifier.weight(1f))
+                    Button(onDismiss) {
+                        Text("Cancel")
+                    }
+                    Spacer(Modifier.width(10.dp))
+                    Button({ onSave(reconstruct()); onDismiss() }) {
+                        Text("Save")
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun AddCriterionDialog(current: EditionVM.CriterionData?, vm: EditionVM, taken: List<String>, onClose: () -> Unit, onSave: (name: String, desc: String, type: UiGradeType) -> Unit) = DialogWindow(
+    onCloseRequest = onClose,
+    state = rememberDialogState(size = DpSize(750.dp, 600.dp), position = WindowPosition(Alignment.Center))
+) {
+    val focus = remember { FocusRequester() }
+    var type by remember(current) { mutableStateOf(current?.gradeType ?: UiGradeType.FreeText) }
+    var name by remember(current) { mutableStateOf(current?.criterion?.name ?: "") }
+    var desc by remember(current) { mutableStateOf(current?.criterion?.desc ?: "") }
+    val categories by vm.categoricGrades.entities
+    val numeric by vm.numericGrades.entities
+
+    Surface(Modifier.fillMaxSize()) {
+        Box(Modifier.fillMaxSize().padding(10.dp)) {
+            Column(Modifier.align(Alignment.Center)) {
+                OutlinedTextField(name, { name = it }, Modifier.fillMaxWidth().focusRequester(focus), label = { Text("Criterion Name") }, isError = name in taken, singleLine = true)
+                OutlinedTextField(desc, { desc = it }, Modifier.fillMaxWidth(), label = { Text("Short Description") }, singleLine = true)
+                Surface(shape = MaterialTheme.shapes.small, color = Color.White, modifier = Modifier.fillMaxWidth().padding(5.dp)) {
+                    Column {
+                        GradeTypePicker(type, categories, numeric, { n, o -> vm.mkScale(n, o) }, { n, m -> vm.mkNumericScale(n, m) }, Modifier.weight(1f)) { type = it }
+
+                        CancelSaveRow(name.isNotBlank() && (name !in taken || name == current?.criterion?.name), onClose) {
+                            onSave(name, desc, type)
+                            onClose()
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    LaunchedEffect(current) { focus.requestFocus() }
+}
+
+@Composable
+fun SetGradingDialog(name: String, current: UiGradeType, vm: EditionVM, onClose: () -> Unit, onSave: (type: UiGradeType) -> Unit) = DialogWindow(
+    onCloseRequest = onClose,
+    state = rememberDialogState(size = DpSize(750.dp, 600.dp), position = WindowPosition(Alignment.Center))
+) {
+    val focus = remember { FocusRequester() }
+    val categories by vm.categoricGrades.entities
+    val numeric by vm.numericGrades.entities
+    var type by remember(current) { mutableStateOf(current) }
+
+    Surface(Modifier.fillMaxSize()) {
+        Box(Modifier.fillMaxSize().padding(10.dp)) {
+            Column(Modifier.align(Alignment.Center)) {
+                Text("Select a grading scale for $name", style = MaterialTheme.typography.headlineSmall, modifier = Modifier.padding(bottom = 10.dp))
+                Surface(shape = MaterialTheme.shapes.small, color = Color.White, modifier = Modifier.fillMaxWidth().padding(5.dp)) {
+                    Column {
+                        GradeTypePicker(type, categories, numeric, { n, o -> vm.mkScale(n, o) }, { n, m -> vm.mkNumericScale(n, m) }, Modifier.weight(1f)) { type = it }
+
+                        CancelSaveRow(true, onClose) {
+                            onSave(type)
+                            onClose()
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    LaunchedEffect(current) { focus.requestFocus() }
+}
+
+@Composable
+fun GradeTypePicker(
+    type: UiGradeType, categories: List<UiGradeType.Categoric>, numeric: List<UiGradeType.Numeric>,
+    mkCat: (String, List<String>) -> Unit, mkNum: (String, Double) -> Unit,
+    modifier: Modifier = Modifier,
+    onUpdate: (UiGradeType) -> Unit
+) = Column(modifier) {
+    var selectedCategory by remember(categories) {
+        mutableStateOf(
+            if(type is UiGradeType.Categoric) categories.indexOfFirst { it.grade.id == type.grade.id }
+            else -1
+        )
+    }
+    var selectedNumeric by remember(numeric) {
+        mutableStateOf(
+            if(type is UiGradeType.Numeric) numeric.indexOfFirst { it.grade.id == type.grade.id }
+            else -1
+        )
+    }
+    var adding by remember { mutableStateOf(false) }
+
+    SingleChoiceSegmentedButtonRow(Modifier.fillMaxWidth()) {
+        SegmentedButton(
+            type is UiGradeType.FreeText, onClick = { onUpdate(UiGradeType.FreeText) },
+            shape = SegmentedButtonDefaults.itemShape(0, 4)
+        ) {
+            Text("Free-form grade")
+        }
+        SegmentedButton(
+            type is UiGradeType.Percentage, onClick = { onUpdate(UiGradeType.Percentage) },
+            shape = SegmentedButtonDefaults.itemShape(1, 4)
+        ) {
+            Text("Percentage")
+        }
+        SegmentedButton(
+            type is UiGradeType.Categoric, onClick = { onUpdate(categories[maxOf(selectedCategory, 0)]) },
+            shape = SegmentedButtonDefaults.itemShape(2, 4)
+        ) {
+            Text("Grading System")
+        }
+        SegmentedButton(
+            type is UiGradeType.Numeric, onClick = { onUpdate(numeric[maxOf(selectedNumeric, 0)]) },
+            shape = SegmentedButtonDefaults.itemShape(3, 4)
+        ) {
+            Text("Numeric Grade")
+        }
+    }
+    (type as? UiGradeType.Categoric)?.let {
+        LazyColumn(Modifier.weight(1f)) {
+            itemsIndexed(categories) { idx, it ->
+                Surface(
+                    tonalElevation = if (selectedCategory == idx) 15.dp else 0.dp,
+                    shape = MaterialTheme.shapes.small
+                ) {
+                    Column(Modifier.fillMaxWidth().clickable { selectedCategory = idx; onUpdate(it) }.padding(10.dp)) {
+                        Text(it.grade.name, fontWeight = FontWeight.Bold)
+                        Text(
+                            "(${it.options.size} options)",
+                            Modifier.padding(start = 10.dp),
+                            fontStyle = FontStyle.Italic
+                        )
+                    }
+                }
+            }
+
+            item {
+                Button({ adding = true }, Modifier.fillMaxWidth()) {
+                    Text("Add grading system")
+                }
+            }
+        }
+    } ?: (type as? UiGradeType.Numeric)?.let {
+        LazyColumn(Modifier.weight(1f)) {
+            itemsIndexed(numeric) { idx, it ->
+                Surface(
+                    tonalElevation = if (selectedNumeric == idx) 15.dp else 0.dp,
+                    shape = MaterialTheme.shapes.small
+                ) {
+                    Column(Modifier.fillMaxWidth().clickable { selectedNumeric = idx; onUpdate(it) }.padding(10.dp)) {
+                        Text(it.grade.name, fontWeight = FontWeight.Bold)
+                        Text(
+                            "(graded as X/${it.grade.max})",
+                            Modifier.padding(start = 10.dp),
+                            fontStyle = FontStyle.Italic
+                        )
+                    }
+                }
+            }
+
+            item {
+                Button({ adding = true }, Modifier.fillMaxWidth()) {
+                    Text("Add numeric system")
+                }
+            }
+        }
+    } ?: Spacer(Modifier.weight(1f))
+
+    if(adding) {
+        when(type) {
+            is UiGradeType.Categoric -> AddCatScaleDialog(categories.map { it.grade.name }, { adding = false }) { name, options ->
+                mkCat(name, options)
+            }
+            is UiGradeType.Numeric -> AddNumScaleDialog(numeric.map { it.grade.name }, { adding = false }) { name, max ->
+                mkNum(name, max)
+            }
+            else -> adding = false
+        }
+    }
+}
+
+@Composable
+fun AddCatScaleDialog(taken: List<String>, onClose: () -> Unit, onSave: (String, List<String>) -> Unit) = DialogWindow(
+    onCloseRequest = onClose,
+    state = rememberDialogState(size = DpSize(750.dp, 600.dp), position = WindowPosition(Alignment.Center))
+) {
+    val focus = remember { FocusRequester() }
+    var name by remember { mutableStateOf("") }
+    var options by remember { mutableStateOf(listOf<String>()) }
+    var adding by remember { mutableStateOf("") }
+
+    Surface(Modifier.fillMaxSize()) {
+        Box(Modifier.fillMaxSize().padding(10.dp)) {
+            Column(Modifier.align(Alignment.Center)) {
+                OutlinedTextField(name, { name = it }, Modifier.fillMaxWidth().focusRequester(focus), label = { Text("Grading system name") }, isError = name in taken, singleLine = true)
+                Text("Grade options:", style = MaterialTheme.typography.headlineSmall, modifier = Modifier.padding(top = 10.dp))
+                LazyColumn(Modifier.weight(1f)) {
+                    itemsIndexed(options) { idx, it ->
+                        Row(Modifier.fillMaxWidth().padding(5.dp)) {
+                            Text(it, Modifier.weight(1f))
+                            IconButton({ options = options.filterNot { o -> o == it } }) {
+                                Icon(Delete, "Delete grading option")
+                            }
+                        }
+                    }
+                    item {
+                        Row {
+                            OutlinedTextField(adding, { adding = it }, Modifier.weight(1f).align(Alignment.CenterVertically).padding(5.dp), label = { Text("New option") }, isError = adding in options, singleLine = true)
+                            Button({ options = options + adding; adding = "" }, Modifier.align(Alignment.CenterVertically).padding(5.dp), enabled = adding.isNotBlank() && adding !in options) {
+                                Text("Add")
+                            }
+                        }
+                    }
+                }
+                CancelSaveRow(name.isNotBlank() && name !in taken, onClose) {
+                    onSave(name, options)
+                    onClose()
+                }
+            }
+        }
+    }
+
+    LaunchedEffect(Unit) { focus.requestFocus() }
+}
+
+@Composable
+fun AddNumScaleDialog(taken: List<String>, onClose: () -> Unit, onSave: (String, Double) -> Unit) = DialogWindow(
+    onCloseRequest = onClose,
+    state = rememberDialogState(size = DpSize(750.dp, 300.dp), position = WindowPosition(Alignment.Center))
+) {
+    val focus = remember { FocusRequester() }
+    var name by remember { mutableStateOf("") }
+    var maxStr by remember { mutableStateOf("0") }
+
+    Surface(Modifier.fillMaxSize()) {
+        Box(Modifier.fillMaxSize().padding(10.dp)) {
+            Column(Modifier.align(Alignment.Center)) {
+                OutlinedTextField(name, { name = it }, Modifier.fillMaxWidth().focusRequester(focus), label = { Text("Grading system name") }, isError = name in taken, singleLine = true)
+                OutlinedTextField(maxStr, { maxStr = it.toDoubleOrNull()?.let { _ -> it } ?: "0" }, Modifier.fillMaxWidth(), label = { Text("Maximum grade") }, singleLine = true)
+
+                CancelSaveRow(name.isNotBlank() && name !in taken && (maxStr.toDoubleOrNull() ?: 0.0) > 0.0, onClose) {
+                    onSave(name, maxStr.toDoubleOrNull()!!)
+                    onClose()
+                }
+            }
+        }
+    }
+
+    LaunchedEffect(Unit) { focus.requestFocus() }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/Courses.kt

@@ -1,109 +1,87 @@
 package com.jaytux.grader.ui
 
-import androidx.compose.foundation.clickable
-import androidx.compose.foundation.layout.*
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Delete
-import androidx.compose.material.icons.filled.Edit
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
-import androidx.compose.material3.Button
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
-import androidx.compose.material3.Text
-import androidx.compose.runtime.*
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.text.font.FontStyle
-import androidx.compose.ui.unit.dp
-import com.jaytux.grader.UiRoute
-import com.jaytux.grader.data.Edition
-import com.jaytux.grader.viewmodel.CourseListState
-import com.jaytux.grader.viewmodel.EditionListState
-import com.jaytux.grader.viewmodel.EditionState
-
-@Composable
-fun CoursesView(state: CourseListState, push: (UiRoute) -> Unit) {
-    val data by state.courses.entities
-    var showDialog by remember { mutableStateOf(false) }
-
-    Box(Modifier.padding(15.dp)) {
-        ListOrEmpty(
-            data,
-            { Text("You have no courses yet.", Modifier.align(Alignment.CenterHorizontally)) },
-            { Text("Add a course") },
-            { showDialog = true },
-            addAfterLazy = false
-        ) { _, it ->
-            CourseWidget(state.getEditions(it), { state.delete(it) }, push)
-        }
-    }
-
-    if(showDialog) AddStringDialog("Course name", data.map { it.name }, { showDialog = false }) { state.new(it) }
-}
-
-@Composable
-fun CourseWidget(state: EditionListState, onDelete: () -> Unit, push: (UiRoute) -> Unit) {
-    val editions by state.editions.entities
-    var isOpened by remember { mutableStateOf(false) }
-    var showDialog by remember { mutableStateOf(false) }
-
-    val callback = { it: Edition ->
-        val s = EditionState(it)
-        val route = UiRoute("${state.course.name}: ${it.name}") {
-            EditionView(s)
-        }
-        push(route)
-    }
-
-    Surface(Modifier.fillMaxWidth().padding(horizontal = 5.dp, vertical = 10.dp).clickable { isOpened = !isOpened }, shape = MaterialTheme.shapes.medium, tonalElevation = 2.dp, shadowElevation = 2.dp) {
-        Row {
-            Column(Modifier.weight(1f).padding(5.dp)) {
-                Row {
-                    Icon(
-                        if (isOpened) ChevronDown else ChevronRight, "Toggle editions",
-                        Modifier.size(MaterialTheme.typography.headlineMedium.fontSize.toDp())
-                            .align(Alignment.CenterVertically)
-                    )
-                    Column {
-                        Text(state.course.name, style = MaterialTheme.typography.headlineMedium)
-                    }
-                }
-                Row {
-                    Spacer(Modifier.width(25.dp))
-                    Text(
-                        "${editions.size} edition(s)",
-                        fontStyle = FontStyle.Italic,
-                        style = MaterialTheme.typography.bodySmall
-                    )
-                }
-
-                if(isOpened) {
-                    Row {
-                        Spacer(Modifier.width(25.dp))
-                        Column {
-                            editions.forEach { EditionWidget(it, { callback(it) }) { state.delete(it) } }
-                            Button({ showDialog = true }, Modifier.fillMaxWidth()) { Text("Add edition") }
-                        }
-                    }
-                }
-            }
-            Column {
-                IconButton({ onDelete() }) { Icon(Icons.Default.Delete, "Remove") }
-                IconButton({ TODO() }, enabled = false) { Icon(Icons.Default.Edit, "Edit") }
-            }
-        }
-    }
-
-    if(showDialog) AddStringDialog("Edition name", editions.map { it.name }, { showDialog = false }) { state.new(it) }
-}
-
-@Composable
-fun EditionWidget(edition: Edition, onOpen: () -> Unit, onDelete: () -> Unit) {
-    Surface(Modifier.fillMaxWidth().padding(horizontal = 5.dp, vertical = 10.dp).clickable { onOpen() }, shape = MaterialTheme.shapes.medium, tonalElevation = 2.dp, shadowElevation = 2.dp) {
-        Row(Modifier.padding(5.dp)) {
-            Text(edition.name, Modifier.weight(1f), style = MaterialTheme.typography.headlineSmall)
-            IconButton({ onDelete() }) { Icon(Icons.Default.Delete, "Remove") }
-        }
-    }
-}
+//@Composable
+//fun CoursesView(state: CourseListState, push: (UiRoute) -> Unit) {
+//    val data by state.courses.entities
+//    var showDialog by remember { mutableStateOf(false) }
+//
+//    Box(Modifier.padding(15.dp)) {
+//        ListOrEmpty(
+//            data,
+//            { Text("You have no courses yet.", Modifier.align(Alignment.CenterHorizontally)) },
+//            { Text("Add a course") },
+//            { showDialog = true },
+//            addAfterLazy = false
+//        ) { _, it ->
+//            CourseWidget(state.getEditions(it), { state.delete(it) }, push)
+//        }
+//    }
+//
+//    if(showDialog) AddStringDialog("Course name", data.map { it.name }, { showDialog = false }) { state.new(it) }
+//}
+//
+//@Composable
+//fun CourseWidget(state: EditionListState, onDelete: () -> Unit, push: (UiRoute) -> Unit) {
+//    val editions by state.editions.entities
+//    var isOpened by remember { mutableStateOf(false) }
+//    var showDialog by remember { mutableStateOf(false) }
+//
+//    val callback = { it: Edition ->
+//        val s = EditionState(it)
+//        val route = UiRoute("${state.course.name}: ${it.name}") {
+//            EditionView(s)
+//        }
+//        push(route)
+//    }
+//
+//    Surface(Modifier.fillMaxWidth().padding(horizontal = 5.dp, vertical = 10.dp).clickable { isOpened = !isOpened }, shape = MaterialTheme.shapes.medium, tonalElevation = 2.dp, shadowElevation = 2.dp) {
+//        Row {
+//            Column(Modifier.weight(1f).padding(5.dp)) {
+//                Row {
+//                    Icon(
+//                        if (isOpened) ChevronDown else ChevronRight, "Toggle editions",
+//                        Modifier.size(MaterialTheme.typography.headlineMedium.fontSize.toDp())
+//                            .align(Alignment.CenterVertically)
+//                    )
+//                    Column {
+//                        Text(state.course.name, style = MaterialTheme.typography.headlineMedium)
+//                    }
+//                }
+//                Row {
+//                    Spacer(Modifier.width(25.dp))
+//                    Text(
+//                        "${editions.size} edition(s)",
+//                        fontStyle = FontStyle.Italic,
+//                        style = MaterialTheme.typography.bodySmall
+//                    )
+//                }
+//
+//                if(isOpened) {
+//                    Row {
+//                        Spacer(Modifier.width(25.dp))
+//                        Column {
+//                            editions.forEach { EditionWidget(it, { callback(it) }) { state.delete(it) } }
+//                            Button({ showDialog = true }, Modifier.fillMaxWidth()) { Text("Add edition") }
+//                        }
+//                    }
+//                }
+//            }
+//            Column {
+//                IconButton({ onDelete() }) { Icon(Icons.Default.Delete, "Remove") }
+//                IconButton({ TODO() }, enabled = false) { Icon(Icons.Default.Edit, "Edit") }
+//            }
+//        }
+//    }
+//
+//    if(showDialog) AddStringDialog("Edition name", editions.map { it.name }, { showDialog = false }) { state.new(it) }
+//}
+//
+//@Composable
+//fun EditionWidget(edition: Edition, onOpen: () -> Unit, onDelete: () -> Unit) {
+//    Surface(Modifier.fillMaxWidth().padding(horizontal = 5.dp, vertical = 10.dp).clickable { onOpen() }, shape = MaterialTheme.shapes.medium, tonalElevation = 2.dp, shadowElevation = 2.dp) {
+//        Row(Modifier.padding(5.dp)) {
+//            Text(edition.name, Modifier.weight(1f), style = MaterialTheme.typography.headlineSmall)
+//            IconButton({ onDelete() }) { Icon(Icons.Default.Delete, "Remove") }
+//        }
+//    }
+//}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/EditionView.kt

@@ -0,0 +1,100 @@
+package com.jaytux.grader.ui
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.material3.Button
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.PrimaryScrollableTabRow
+import androidx.compose.material3.PrimaryTabRow
+import androidx.compose.material3.Tab
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.jaytux.grader.EditionDetail
+import com.jaytux.grader.data.v2.BaseAssignment
+import com.jaytux.grader.data.v2.Student
+import com.jaytux.grader.viewmodel.EditionVM
+import com.jaytux.grader.viewmodel.Navigator
+
+@Composable
+fun EditionTitle(data: EditionDetail) = Text("Courses / ${data.course.name} / ${data.ed.name}")
+
+@Composable
+fun EditionView(data: EditionDetail, token: Navigator.NavToken) {
+    val vm = viewModel<EditionVM>(key = data.ed.id.toString()) { EditionVM(data.ed, data.course) }
+    val tab by vm.selectedTab
+    var adding by remember { mutableStateOf(false) }
+
+    val groups by vm.groupList.entities
+    val assignments by vm.assignmentList.entities
+
+
+    Column(Modifier.padding(10.dp)) {
+        Row {
+            Text("${vm.course.name} - ${vm.edition.name}", Modifier.weight(1f), style = MaterialTheme.typography.headlineMedium)
+            Button({ adding = true }) {
+                Icon(CirclePlus, "Add ${tab.addText}")
+                Spacer(Modifier.width(5.dp))
+                Text("Add ${tab.addText}")
+            }
+        }
+        Spacer(Modifier.height(5.dp))
+        PrimaryScrollableTabRow(tab.ordinal, edgePadding = 10.dp) {
+            EditionVM.Tab.entries.forEach {
+                Tab(tab == it, onClick = { vm.switchTo(it) }, modifier = Modifier.padding(horizontal = 5.dp)) { it.renderTab() }
+            }
+        }
+        Box(Modifier.weight(1f)) {
+            when (tab) {
+                EditionVM.Tab.STUDENTS -> StudentsView(vm)
+                EditionVM.Tab.GROUPS -> GroupsView(vm)
+                EditionVM.Tab.ASSIGNMENTS -> AssignmentsView(vm, token)
+            }
+        }
+    }
+
+    if(adding) {
+        when(tab) {
+            EditionVM.Tab.STUDENTS ->
+                AddStringDialog("Student Name", listOf(), { adding = false }, "") { vm.mkStudent(it, "", "") }
+            EditionVM.Tab.GROUPS ->
+                AddStringDialog("Group Name", groups.map { it.group.name }, { adding = false }, "") { vm.mkGroup(it) }
+            EditionVM.Tab.ASSIGNMENTS ->
+                AddAssignmentDialog("Assignment Name", assignments.map { it.assignment.name }, { adding = false }, "") { name, type -> vm.mkAssignment(name, type) }
+        }
+    }
+}
+
+@Composable
+fun StudentsTabHeader() = Row(Modifier.padding(all = 5.dp)) {
+    Icon(UserIcon, "Students")
+    Spacer(Modifier.width(5.dp))
+    Text("Students")
+}
+
+@Composable
+fun GroupsTabHeader() = Row(Modifier.padding(all = 5.dp)) {
+    Icon(UserGroupIcon, "Groups")
+    Spacer(Modifier.width(5.dp))
+    Text("Groups")
+}
+
+@Composable
+fun AssignmentsTabHeader() = Row(Modifier.padding(all = 5.dp)) {
+    Icon(AssignmentIcon, "Assignments")
+    Spacer(Modifier.width(5.dp))
+    Text("Assignments")
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/Editions.kt

@@ -1,419 +1,409 @@
 package com.jaytux.grader.ui
 
-import androidx.compose.foundation.clickable
-import androidx.compose.foundation.layout.*
-import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.itemsIndexed
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.ArrowDownward
-import androidx.compose.material.icons.filled.ArrowUpward
-import androidx.compose.material.icons.filled.Delete
-import androidx.compose.material.icons.filled.Edit
-import androidx.compose.material3.*
-import androidx.compose.runtime.*
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.text.style.TextAlign
-import androidx.compose.ui.unit.DpSize
-import androidx.compose.ui.unit.dp
-import androidx.compose.ui.window.DialogWindow
-import androidx.compose.ui.window.WindowPosition
-import androidx.compose.ui.window.rememberDialogState
-import com.jaytux.grader.data.Course
-import com.jaytux.grader.data.Edition
-import com.jaytux.grader.data.Group
-import com.jaytux.grader.data.Student
-import com.jaytux.grader.viewmodel.*
 
-data class Navigators(
-    val student: (Student) -> Unit,
-    val group: (Group) -> Unit,
-    val assignment: (Assignment) -> Unit
-)
-
-@Composable
-fun EditionView(state: EditionState) = Row(Modifier.padding(0.dp)) {
-    val course = state.course; val edition = state.edition
-    val students by state.students.entities
-    val availableStudents by state.availableStudents.entities
-    val groups by state.groups.entities
-    val solo by state.solo.entities
-    val groupAs by state.groupAs.entities
-    val peers by state.peer.entities
-    val mergedAssignments by remember(solo, groupAs, peers) { mutableStateOf(Assignment.merge(groupAs, solo, peers)) }
-    val hist by state.history
-
-    val navs = Navigators(
-        student = { state.navTo(OpenPanel.Student, students.indexOfFirst{ s -> s.id == it.id }) },
-        group = { state.navTo(OpenPanel.Group, groups.indexOfFirst { g -> g.id == it.id }) },
-        assignment = { state.navTo(OpenPanel.Assignment, mergedAssignments.indexOfFirst { a -> a.id() == it.id() }) }
-    )
-
-    val (id, tab) = hist.last()
-    Surface(Modifier.weight(0.25f), tonalElevation = 5.dp) {
-        TabLayout(
-            OpenPanel.entries,
-            tab.ordinal,
-            { state.navTo(OpenPanel.entries[it]) },
-            { Text(it.tabName) }
-        ) {
-            when(tab) {
-                OpenPanel.Student -> StudentPanel(
-                    course, edition, students, availableStudents, id,
-                    { state.navTo(it) },
-                    { name, note, contact, add -> state.newStudent(name, contact, note, add) },
-                    { students -> state.addToCourse(students) },
-                    { s, name -> state.setStudentName(s, name) }
-                ) { s, idx -> state.delete(s); if(id == idx) state.clearHistoryIndex() }
-
-                OpenPanel.Group -> GroupPanel(
-                    course, edition, groups, id,
-                    { state.navTo(it) },
-                    { name -> state.newGroup(name) },
-                    { g, name -> state.setGroupName(g, name) }
-                ) { g, idx -> state.delete(g); if(id == idx) state.clearHistoryIndex() }
-
-                OpenPanel.Assignment -> AssignmentPanel(
-                    course, edition, mergedAssignments, id,
-                    { state.navTo(it) },
-                    { type, name -> state.newAssignment(type, name) },
-                    { a, name -> state.setAssignmentTitle(a, name) },
-                    { a1, a2 -> state.swapOrder(a1, a2) }
-                ) { a, idx -> state.delete(a); if(id == idx) state.clearHistoryIndex() }
-            }
-        }
-    }
-
-    Column(Modifier.weight(0.75f)) {
-        Row {
-            IconButton({ state.back() }, enabled = hist.size >= 2) {
-                Icon(ChevronLeft, "Back", Modifier.size(MaterialTheme.typography.headlineMedium.fontSize.toDp()).align(Alignment.CenterVertically))
-            }
-            when(tab) {
-                OpenPanel.Student -> {
-                    if(id == -1) PaneHeader("Nothing selected", "students", course, edition)
-                    else PaneHeader(students[id].name, "student", course, edition)
-                }
-                OpenPanel.Group -> {
-                    if(id == -1) PaneHeader("Nothing selected", "groups", course, edition)
-                    else PaneHeader(groups[id].name, "group", course, edition)
-                }
-                OpenPanel.Assignment -> {
-                    if(id == -1) PaneHeader("Nothing selected", "assignments", course, edition)
-                    else {
-                        when(val a = mergedAssignments[id]) {
-                            is Assignment.SAssignment -> PaneHeader(a.name(), "individual assignment", course, edition)
-                            is Assignment.GAssignment -> PaneHeader(a.name(), "group assignment", course, edition)
-                            is Assignment.PeerEval -> PaneHeader(a.name(), "peer evaluation", course, edition)
-                        }
-                    }
-                }
-            }
-        }
-        Box(Modifier.weight(1f)) {
-            if (id != -1) {
-                when (tab) {
-                    OpenPanel.Student -> StudentView(StudentState(students[id], edition), navs)
-                    OpenPanel.Group -> GroupView(GroupState(groups[id]), navs)
-                    OpenPanel.Assignment -> {
-                        when (val a = mergedAssignments[id]) {
-                            is Assignment.SAssignment -> SoloAssignmentView(SoloAssignmentState(a.assignment))
-                            is Assignment.GAssignment -> GroupAssignmentView(GroupAssignmentState(a.assignment))
-                            is Assignment.PeerEval -> PeerEvaluationView(PeerEvaluationState(a.evaluation))
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
-
-@Composable
-fun StudentPanel(
-    course: Course, edition: Edition, students: List<Student>, available: List<Student>,
-    selected: Int, onSelect: (Int) -> Unit,
-    onAdd: (name: String, note: String, contact: String, addToEdition: Boolean) -> Unit,
-    onImport: (List<Student>) -> Unit, onUpdate: (Student, String) -> Unit, onDelete: (Student, Int) -> Unit
-) = Column(Modifier.padding(10.dp)) {
-    var showDialog by remember { mutableStateOf(false) }
-    var deleting by remember { mutableStateOf(-1) }
-    var editing by remember { mutableStateOf(-1) }
-
-    Text("Student list (${students.size})", style = MaterialTheme.typography.headlineMedium)
-
-    ListOrEmpty(
-        students,
-        { Text(
-            "Course ${course.name} (edition ${edition.name})\nhas no students yet.",
-            Modifier.align(Alignment.CenterHorizontally), textAlign = TextAlign.Center
-        ) },
-        { Text("Add a student") },
-        { showDialog = true }
-    ) { idx, it ->
-        SelectEditDeleteRow(
-            selected == idx,
-            { onSelect(idx) }, { onSelect(-1) },
-            { editing = idx }, { deleting = idx }
-        ) {
-            Text(it.name, Modifier.padding(5.dp))
-        }
-    }
-
-    if(showDialog) {
-        StudentDialog(course, edition, { showDialog = false }, available, onImport, onAdd)
-    }
-    else if(editing != -1) {
-        AddStringDialog("Student name", students.map { it.name }, { editing = -1 }, students[editing].name) {
-            onUpdate(students[editing], it)
-        }
-    }
-    else if(deleting != -1) {
-        ConfirmDeleteDialog(
-            "a student",
-            { deleting = -1 },
-            { onDelete(students[deleting], deleting) }
-        ) { Text(students[deleting].name) }
-    }
-}
-
-@Composable
-fun GroupPanel(
-    course: Course, edition: Edition, groups: List<Group>,
-    selected: Int, onSelect: (Int) -> Unit,
-    onAdd: (String) -> Unit, onUpdate: (Group, String) -> Unit, onDelete: (Group, Int) -> Unit
-) = Column(Modifier.padding(10.dp)) {
-    var showDialog by remember { mutableStateOf(false) }
-    var deleting by remember { mutableStateOf(-1) }
-    var editing by remember { mutableStateOf(-1) }
-
-    Text("Group list (${groups.size})", style = MaterialTheme.typography.headlineMedium)
-
-    ListOrEmpty(
-        groups,
-        { Text(
-            "Course ${course.name} (edition ${edition.name})\nhas no groups yet.",
-            Modifier.align(Alignment.CenterHorizontally), textAlign = TextAlign.Center
-        ) },
-        { Text("Add a group") },
-        { showDialog = true }
-    ) { idx, it ->
-        SelectEditDeleteRow(
-            selected == idx,
-            { onSelect(idx) }, { onSelect(-1) },
-            { editing = idx }, { deleting = idx }
-        ) {
-            Text(it.name, Modifier.padding(5.dp))
-        }
-    }
-
-    if(showDialog) {
-        AddStringDialog("Group name", groups.map{ it.name }, { showDialog = false }) { onAdd(it) }
-    }
-    else if(editing != -1) {
-        AddStringDialog("Group name", groups.map { it.name }, { editing = -1 }, groups[editing].name) {
-            onUpdate(groups[editing], it)
-        }
-    }
-    else if(deleting != -1) {
-        ConfirmDeleteDialog(
-            "a group",
-            { deleting = -1 },
-            { onDelete(groups[deleting], deleting) }
-        ) { Text(groups[deleting].name) }
-    }
-}
-
-@Composable
-fun AssignmentPanel(
-    course: Course, edition: Edition, assignments: List<Assignment>,
-    selected: Int, onSelect: (Int) -> Unit,
-    onAdd: (AssignmentType, String) -> Unit, onUpdate: (Assignment, String) -> Unit,
-    onSwapOrder: (Assignment, Assignment) -> Unit, onDelete: (Assignment, Int) -> Unit
-) = Column(Modifier.padding(10.dp)) {
-    var showDialog by remember { mutableStateOf(false) }
-    var deleting by remember { mutableStateOf(-1) }
-    var editing by remember { mutableStateOf(-1) }
-
-    val dialog: @Composable (String, List<String>, () -> Unit, String, (AssignmentType, String) -> Unit) -> Unit =
-        { label, taken, onClose, current, onSave ->
-            DialogWindow(
-                onCloseRequest = onClose,
-                state = rememberDialogState(size = DpSize(400.dp, 300.dp), position = WindowPosition(Alignment.Center))
-            ) {
-                var name by remember(current) { mutableStateOf(current) }
-                var tab by remember { mutableStateOf(AssignmentType.Solo) }
-
-                Surface(Modifier.fillMaxSize()) {
-                    TabLayout(
-                        AssignmentType.entries,
-                        tab.ordinal,
-                        { tab = AssignmentType.entries[it] },
-                        { Text(it.show) }
-                    ) {
-                        Box(Modifier.fillMaxSize().padding(10.dp)) {
-                            Column(Modifier.align(Alignment.Center)) {
-                                OutlinedTextField(
-                                    name,
-                                    { name = it },
-                                    Modifier.fillMaxWidth(),
-                                    label = { Text(label) },
-                                    isError = name in taken
-                                )
-                                CancelSaveRow(name.isNotBlank() && name !in taken, onClose) {
-                                    onSave(tab, name)
-                                    onClose()
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-        }
-
-    Text("Assignment list (${assignments.size})", style = MaterialTheme.typography.headlineMedium)
-
-    ListOrEmpty(
-        assignments,
-        { Text(
-            "Course ${course.name} (edition ${edition.name})\nhas no assignments yet.",
-            Modifier.align(Alignment.CenterHorizontally), textAlign = TextAlign.Center
-        ) },
-        { Text("Add an assignment") },
-        { showDialog = true }
-    ) { idx, it ->
-        Selectable(
-            selected == idx,
-            { onSelect(idx) }, { onSelect(-1) }
-        ) {
-            Row {
-                Text(it.name(), Modifier.padding(5.dp).align(Alignment.CenterVertically).weight(1f))
-                Column(Modifier.padding(2.dp)) {
-                    Icon(Icons.Default.ArrowUpward, "Move up", Modifier.clickable {
-                        if(idx > 0) onSwapOrder(assignments[idx], assignments[idx - 1])
-                    })
-                    Icon(Icons.Default.ArrowDownward, "Move down", Modifier.clickable {
-                        if(idx < assignments.size - 1) onSwapOrder(assignments[idx], assignments[idx + 1])
-                    })
-                }
-                Column(Modifier.padding(2.dp)) {
-                    Icon(Icons.Default.Edit, "Edit", Modifier.clickable { editing = idx })
-                    Icon(Icons.Default.Delete, "Delete", Modifier.clickable { deleting = idx })
-                }
-            }
-        }
-    }
-
-    if(showDialog) {
-        dialog("Assignment name", assignments.map{ it.name() }, { showDialog = false }, "", onAdd)
-    }
-    else if(editing != -1) {
-        AddStringDialog("Assignment name", assignments.map { it.name() }, { editing = -1 }, assignments[editing].name()) {
-            onUpdate(assignments[editing], it)
-        }
-    }
-    else if(deleting != -1) {
-        ConfirmDeleteDialog(
-            "an assignment",
-            { deleting = -1 },
-            { onDelete(assignments[deleting], deleting) }
-        ) { if(deleting != -1) Text(assignments[deleting].name()) }
-    }
-}
-
-@Composable
-fun StudentDialog(
-    course: Course,
-    edition: Edition,
-    onClose: () -> Unit,
-    availableStudents: List<Student>,
-    onImport: (List<Student>) -> Unit,
-    onAdd: (name: String, note: String, contact: String, addToEdition: Boolean) -> Unit
-) = DialogWindow(
-    onCloseRequest = onClose,
-    state = rememberDialogState(size = DpSize(600.dp, 400.dp), position = WindowPosition(Alignment.Center))
-) {
-    Surface(Modifier.fillMaxSize()) {
-        Column(Modifier.padding(10.dp)) {
-            var isImport by remember { mutableStateOf(false) }
-            TabRow(if(isImport) 1 else 0) {
-                Tab(!isImport, { isImport = false }) { Text("Add new student") }
-                Tab(isImport, { isImport = true }) { Text("Add existing student") }
-            }
-
-            if(isImport) {
-                if(availableStudents.isEmpty()) {
-                    Box(Modifier.fillMaxSize()) {
-                        Text("No students available to add to this course.", Modifier.align(Alignment.Center))
-                    }
-                }
-                else {
-                    var selected by remember { mutableStateOf(setOf<Int>()) }
-
-                    val onClick = { idx: Int ->
-                        selected = if(idx in selected) selected - idx else selected + idx
-                    }
-
-                    Text("Select students to add to ${course.name} ${edition.name}")
-                    LazyColumn {
-                        itemsIndexed(availableStudents) { idx, student ->
-                            Surface(
-                                Modifier.fillMaxWidth().clickable { onClick(idx) },
-                                tonalElevation = if (selected.contains(idx)) 5.dp else 0.dp
-                            ) {
-                                Row {
-                                    Checkbox(selected.contains(idx), { onClick(idx) })
-                                    Text(student.name, Modifier.padding(5.dp))
-                                }
-                            }
-                        }
-                    }
-                    CancelSaveRow(selected.isNotEmpty(), onClose) {
-                        onImport(selected.map { idx -> availableStudents[idx] })
-                        onClose()
-                    }
-                }
-            }
-            else {
-                Box(Modifier.fillMaxSize()) {
-                    var name by remember { mutableStateOf("") }
-                    var contact by remember { mutableStateOf("") }
-                    var note by remember { mutableStateOf("") }
-                    var add by remember { mutableStateOf(true) }
-
-                    Column(Modifier.align(Alignment.Center)) {
-                        OutlinedTextField(
-                            name,
-                            { name = it },
-                            Modifier.fillMaxWidth(),
-                            singleLine = true,
-                            label = { Text("Student name") })
-                        OutlinedTextField(
-                            contact,
-                            { contact = it },
-                            Modifier.fillMaxWidth(),
-                            singleLine = true,
-                            label = { Text("Student contact") })
-                        OutlinedTextField(
-                            note,
-                            { note = it },
-                            Modifier.fillMaxWidth(),
-                            singleLine = false,
-                            minLines = 3,
-                            label = { Text("Note") })
-                        Row {
-                            Checkbox(add, { add = it })
-                            Text(
-                                "Add student to ${course.name} ${edition.name}?",
-                                Modifier.align(Alignment.CenterVertically)
-                            )
-                        }
-                        CancelSaveRow(name.isNotBlank() && contact.isNotBlank(), onClose) {
-                            onAdd(name, note, contact, add)
-                            onClose()
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
+//data class Navigators(
+//    val student: (Student) -> Unit,
+//    val group: (Group) -> Unit,
+//    val assignment: (Assignment) -> Unit
+//)
+//
+//@Composable
+//fun EditionView(state: EditionState) = Row(Modifier.padding(0.dp)) {
+//    val course = state.course; val edition = state.edition
+//    val students by state.students.entities
+//    val availableStudents by state.availableStudents.entities
+//    val groups by state.groups.entities
+//    val solo by state.solo.entities
+//    val groupAs by state.groupAs.entities
+//    val peers by state.peer.entities
+//    val mergedAssignments by remember(solo, groupAs, peers) { mutableStateOf(Assignment.merge(groupAs, solo, peers)) }
+//    val hist by state.history
+//
+//    val scope = rememberCoroutineScope()
+//
+//    var groupExporting by remember { mutableStateOf<GroupAssignmentState?>(null) }
+//    val groupPopup = rememberDirectoryPickerLauncher(directory = PlatformFile(Preferences.exportPath)) { path ->
+//        if(path != null) {
+//            groupExporting?.let {
+//                Preferences.exportPath = path.toKotlinxIoPath().toString()
+//                scope.launch { it.batchExport(path.toKotlinxIoPath()) }
+//            }
+//        }
+//    }
+//
+//    val navs = Navigators(
+//        student = { state.navTo(OpenPanel.Student, students.indexOfFirst{ s -> s.id == it.id }) },
+//        group = { state.navTo(OpenPanel.Group, groups.indexOfFirst { g -> g.id == it.id }) },
+//        assignment = { state.navTo(OpenPanel.Assignment, mergedAssignments.indexOfFirst { a -> a.id() == it.id() }) }
+//    )
+//
+//    val (id, tab) = hist.last()
+//    Surface(Modifier.weight(0.25f), tonalElevation = 5.dp) {
+//        TabLayout(
+//            OpenPanel.entries,
+//            tab.ordinal,
+//            { state.navTo(OpenPanel.entries[it]) },
+//            { Text(it.tabName) }
+//        ) {
+//            when(tab) {
+//                OpenPanel.Student -> StudentPanel(
+//                    course, edition, students, availableStudents, id,
+//                    { state.navTo(it) },
+//                    { name, note, contact, add -> state.newStudent(name, contact, note, add) },
+//                    { students -> state.addToCourse(students) },
+//                    { s, name -> state.setStudentName(s, name) }
+//                ) { s, idx -> state.delete(s); if(id == idx) state.clearHistoryIndex() }
+//
+//                OpenPanel.Group -> GroupPanel(
+//                    course, edition, groups, id,
+//                    { state.navTo(it) },
+//                    { name -> state.newGroup(name) },
+//                    { g, name -> state.setGroupName(g, name) }
+//                ) { g, idx -> state.delete(g); if(id == idx) state.clearHistoryIndex() }
+//
+//                OpenPanel.Assignment -> AssignmentPanel(
+//                    course, edition, mergedAssignments, id,
+//                    { state.navTo(it) },
+//                    { type, name -> state.newAssignment(type, name) },
+//                    { a, name -> state.setAssignmentTitle(a, name) },
+//                    { a1, a2 -> state.swapOrder(a1, a2) }
+//                ) { a, idx -> state.delete(a); if(id == idx) state.clearHistoryIndex() }
+//            }
+//        }
+//    }
+//
+//    Column(Modifier.weight(0.75f)) {
+//        Row {
+//            IconButton({ state.back() }, enabled = hist.size >= 2) {
+//                Icon(ChevronLeft, "Back", Modifier.size(MaterialTheme.typography.headlineMedium.fontSize.toDp()).align(Alignment.CenterVertically))
+//            }
+//            when(tab) {
+//                OpenPanel.Student -> {
+//                    if(id == -1) PaneHeader("Nothing selected", "students", course, edition)
+//                    else PaneHeader(students[id].name, "student", course, edition)
+//                }
+//                OpenPanel.Group -> {
+//                    if(id == -1) PaneHeader("Nothing selected", "groups", course, edition)
+//                    else PaneHeader(groups[id].name, "group", course, edition)
+//                }
+//                OpenPanel.Assignment -> {
+//                    if(id == -1) PaneHeader("Nothing selected", "assignments", course, edition)
+//                    else {
+//                        when(val a = mergedAssignments[id]) {
+//                            is Assignment.SAssignment -> PaneHeader(a.name(), "individual assignment", course, edition)
+//                            is Assignment.GAssignment -> PaneHeader(a.name(), "group assignment", course, edition) {
+//                                groupExporting = GroupAssignmentState(a.assignment); groupPopup.launch()
+//                            }
+//                            is Assignment.PeerEval -> PaneHeader(a.name(), "peer evaluation", course, edition)
+//                        }
+//                    }
+//                }
+//            }
+//        }
+//        Box(Modifier.weight(1f)) {
+//            if (id != -1) {
+//                when (tab) {
+//                    OpenPanel.Student -> StudentView(StudentState(students[id], edition), navs)
+//                    OpenPanel.Group -> GroupView(GroupState(groups[id]), navs)
+//                    OpenPanel.Assignment -> {
+//                        when (val a = mergedAssignments[id]) {
+//                            is Assignment.SAssignment -> SoloAssignmentView(SoloAssignmentState(a.assignment))
+//                            is Assignment.GAssignment -> GroupAssignmentView(GroupAssignmentState(a.assignment))
+//                            is Assignment.PeerEval -> PeerEvaluationView(PeerEvaluationState(a.evaluation))
+//                        }
+//                    }
+//                }
+//            }
+//        }
+//    }
+//}
+//
+//@Composable
+//fun StudentPanel(
+//    course: Course, edition: Edition, students: List<Student>, available: List<Student>,
+//    selected: Int, onSelect: (Int) -> Unit,
+//    onAdd: (name: String, note: String, contact: String, addToEdition: Boolean) -> Unit,
+//    onImport: (List<Student>) -> Unit, onUpdate: (Student, String) -> Unit, onDelete: (Student, Int) -> Unit
+//) = Column(Modifier.padding(10.dp)) {
+//    var showDialog by remember { mutableStateOf(false) }
+//    var deleting by remember { mutableStateOf(-1) }
+//    var editing by remember { mutableStateOf(-1) }
+//
+//    Text("Student list (${students.size})", style = MaterialTheme.typography.headlineMedium)
+//
+//    ListOrEmpty(
+//        students,
+//        { Text(
+//            "Course ${course.name} (edition ${edition.name})\nhas no students yet.",
+//            Modifier.align(Alignment.CenterHorizontally), textAlign = TextAlign.Center
+//        ) },
+//        { Text("Add a student") },
+//        { showDialog = true }
+//    ) { idx, it ->
+//        SelectEditDeleteRow(
+//            selected == idx,
+//            { onSelect(idx) }, { onSelect(-1) },
+//            { editing = idx }, { deleting = idx }
+//        ) {
+//            Text(it.name, Modifier.padding(5.dp))
+//        }
+//    }
+//
+//    if(showDialog) {
+//        StudentDialog(course, edition, { showDialog = false }, available, onImport, onAdd)
+//    }
+//    else if(editing != -1) {
+//        AddStringDialog("Student name", students.map { it.name }, { editing = -1 }, students[editing].name) {
+//            onUpdate(students[editing], it)
+//        }
+//    }
+//    else if(deleting != -1) {
+//        ConfirmDeleteDialog(
+//            "a student",
+//            { deleting = -1 },
+//            { onDelete(students[deleting], deleting) }
+//        ) { Text(students[deleting].name) }
+//    }
+//}
+//
+//@Composable
+//fun GroupPanel(
+//    course: Course, edition: Edition, groups: List<Group>,
+//    selected: Int, onSelect: (Int) -> Unit,
+//    onAdd: (String) -> Unit, onUpdate: (Group, String) -> Unit, onDelete: (Group, Int) -> Unit
+//) = Column(Modifier.padding(10.dp)) {
+//    var showDialog by remember { mutableStateOf(false) }
+//    var deleting by remember { mutableStateOf(-1) }
+//    var editing by remember { mutableStateOf(-1) }
+//
+//    Text("Group list (${groups.size})", style = MaterialTheme.typography.headlineMedium)
+//
+//    ListOrEmpty(
+//        groups,
+//        { Text(
+//            "Course ${course.name} (edition ${edition.name})\nhas no groups yet.",
+//            Modifier.align(Alignment.CenterHorizontally), textAlign = TextAlign.Center
+//        ) },
+//        { Text("Add a group") },
+//        { showDialog = true }
+//    ) { idx, it ->
+//        SelectEditDeleteRow(
+//            selected == idx,
+//            { onSelect(idx) }, { onSelect(-1) },
+//            { editing = idx }, { deleting = idx }
+//        ) {
+//            Text(it.name, Modifier.padding(5.dp))
+//        }
+//    }
+//
+//    if(showDialog) {
+//        AddStringDialog("Group name", groups.map{ it.name }, { showDialog = false }) { onAdd(it) }
+//    }
+//    else if(editing != -1) {
+//        AddStringDialog("Group name", groups.map { it.name }, { editing = -1 }, groups[editing].name) {
+//            onUpdate(groups[editing], it)
+//        }
+//    }
+//    else if(deleting != -1) {
+//        ConfirmDeleteDialog(
+//            "a group",
+//            { deleting = -1 },
+//            { onDelete(groups[deleting], deleting) }
+//        ) { Text(groups[deleting].name) }
+//    }
+//}
+//
+//@Composable
+//fun AssignmentPanel(
+//    course: Course, edition: Edition, assignments: List<Assignment>,
+//    selected: Int, onSelect: (Int) -> Unit,
+//    onAdd: (AssignmentType, String) -> Unit, onUpdate: (Assignment, String) -> Unit,
+//    onSwapOrder: (Assignment, Assignment) -> Unit, onDelete: (Assignment, Int) -> Unit
+//) = Column(Modifier.padding(10.dp)) {
+//    var showDialog by remember { mutableStateOf(false) }
+//    var deleting by remember { mutableStateOf(-1) }
+//    var editing by remember { mutableStateOf(-1) }
+//
+//    val dialog: @Composable (String, List<String>, () -> Unit, String, (AssignmentType, String) -> Unit) -> Unit =
+//        { label, taken, onClose, current, onSave ->
+//            DialogWindow(
+//                onCloseRequest = onClose,
+//                state = rememberDialogState(size = DpSize(400.dp, 300.dp), position = WindowPosition(Alignment.Center))
+//            ) {
+//                var name by remember(current) { mutableStateOf(current) }
+//                var tab by remember { mutableStateOf(AssignmentType.Solo) }
+//
+//                Surface(Modifier.fillMaxSize()) {
+//                    TabLayout(
+//                        AssignmentType.entries,
+//                        tab.ordinal,
+//                        { tab = AssignmentType.entries[it] },
+//                        { Text(it.show) }
+//                    ) {
+//                        Box(Modifier.fillMaxSize().padding(10.dp)) {
+//                            Column(Modifier.align(Alignment.Center)) {
+//                                OutlinedTextField(
+//                                    name,
+//                                    { name = it },
+//                                    Modifier.fillMaxWidth(),
+//                                    label = { Text(label) },
+//                                    isError = name in taken
+//                                )
+//                                CancelSaveRow(name.isNotBlank() && name !in taken, onClose) {
+//                                    onSave(tab, name)
+//                                    onClose()
+//                                }
+//                            }
+//                        }
+//                    }
+//                }
+//            }
+//        }
+//
+//    Text("Assignment list (${assignments.size})", style = MaterialTheme.typography.headlineMedium)
+//
+//    ListOrEmpty(
+//        assignments,
+//        { Text(
+//            "Course ${course.name} (edition ${edition.name})\nhas no assignments yet.",
+//            Modifier.align(Alignment.CenterHorizontally), textAlign = TextAlign.Center
+//        ) },
+//        { Text("Add an assignment") },
+//        { showDialog = true }
+//    ) { idx, it ->
+//        Selectable(
+//            selected == idx,
+//            { onSelect(idx) }, { onSelect(-1) }
+//        ) {
+//            Row {
+//                Text(it.name(), Modifier.padding(5.dp).align(Alignment.CenterVertically).weight(1f))
+//                Column(Modifier.padding(2.dp)) {
+//                    Icon(Icons.Default.ArrowUpward, "Move up", Modifier.clickable {
+//                        if(idx > 0) onSwapOrder(assignments[idx], assignments[idx - 1])
+//                    })
+//                    Icon(Icons.Default.ArrowDownward, "Move down", Modifier.clickable {
+//                        if(idx < assignments.size - 1) onSwapOrder(assignments[idx], assignments[idx + 1])
+//                    })
+//                }
+//                Column(Modifier.padding(2.dp)) {
+//                    Icon(Icons.Default.Edit, "Edit", Modifier.clickable { editing = idx })
+//                    Icon(Icons.Default.Delete, "Delete", Modifier.clickable { deleting = idx })
+//                }
+//            }
+//        }
+//    }
+//
+//    if(showDialog) {
+//        dialog("Assignment name", assignments.map{ it.name() }, { showDialog = false }, "", onAdd)
+//    }
+//    else if(editing != -1) {
+//        AddStringDialog("Assignment name", assignments.map { it.name() }, { editing = -1 }, assignments[editing].name()) {
+//            onUpdate(assignments[editing], it)
+//        }
+//    }
+//    else if(deleting != -1) {
+//        ConfirmDeleteDialog(
+//            "an assignment",
+//            { deleting = -1 },
+//            { onDelete(assignments[deleting], deleting) }
+//        ) { if(deleting != -1) Text(assignments[deleting].name()) }
+//    }
+//}
+//
+//@Composable
+//fun StudentDialog(
+//    course: Course,
+//    edition: Edition,
+//    onClose: () -> Unit,
+//    availableStudents: List<Student>,
+//    onImport: (List<Student>) -> Unit,
+//    onAdd: (name: String, note: String, contact: String, addToEdition: Boolean) -> Unit
+//) = DialogWindow(
+//    onCloseRequest = onClose,
+//    state = rememberDialogState(size = DpSize(600.dp, 400.dp), position = WindowPosition(Alignment.Center))
+//) {
+//    Surface(Modifier.fillMaxSize()) {
+//        Column(Modifier.padding(10.dp)) {
+//            var isImport by remember { mutableStateOf(false) }
+//            TabRow(if(isImport) 1 else 0) {
+//                Tab(!isImport, { isImport = false }) { Text("Add new student") }
+//                Tab(isImport, { isImport = true }) { Text("Add existing student") }
+//            }
+//
+//            if(isImport) {
+//                if(availableStudents.isEmpty()) {
+//                    Box(Modifier.fillMaxSize()) {
+//                        Text("No students available to add to this course.", Modifier.align(Alignment.Center))
+//                    }
+//                }
+//                else {
+//                    var selected by remember { mutableStateOf(setOf<Int>()) }
+//
+//                    val onClick = { idx: Int ->
+//                        selected = if(idx in selected) selected - idx else selected + idx
+//                    }
+//
+//                    Text("Select students to add to ${course.name} ${edition.name}")
+//                    LazyColumn {
+//                        itemsIndexed(availableStudents) { idx, student ->
+//                            Surface(
+//                                Modifier.fillMaxWidth().clickable { onClick(idx) },
+//                                tonalElevation = if (selected.contains(idx)) 5.dp else 0.dp
+//                            ) {
+//                                Row {
+//                                    Checkbox(selected.contains(idx), { onClick(idx) })
+//                                    Text(student.name, Modifier.padding(5.dp))
+//                                }
+//                            }
+//                        }
+//                    }
+//                    CancelSaveRow(selected.isNotEmpty(), onClose) {
+//                        onImport(selected.map { idx -> availableStudents[idx] })
+//                        onClose()
+//                    }
+//                }
+//            }
+//            else {
+//                Box(Modifier.fillMaxSize()) {
+//                    var name by remember { mutableStateOf("") }
+//                    var contact by remember { mutableStateOf("") }
+//                    var note by remember { mutableStateOf("") }
+//                    var add by remember { mutableStateOf(true) }
+//
+//                    Column(Modifier.align(Alignment.Center)) {
+//                        OutlinedTextField(
+//                            name,
+//                            { name = it },
+//                            Modifier.fillMaxWidth(),
+//                            singleLine = true,
+//                            label = { Text("Student name") })
+//                        OutlinedTextField(
+//                            contact,
+//                            { contact = it },
+//                            Modifier.fillMaxWidth(),
+//                            singleLine = true,
+//                            label = { Text("Student contact") })
+//                        OutlinedTextField(
+//                            note,
+//                            { note = it },
+//                            Modifier.fillMaxWidth(),
+//                            singleLine = false,
+//                            minLines = 3,
+//                            label = { Text("Note") })
+//                        Row {
+//                            Checkbox(add, { add = it })
+//                            Text(
+//                                "Add student to ${course.name} ${edition.name}?",
+//                                Modifier.align(Alignment.CenterVertically)
+//                            )
+//                        }
+//                        CancelSaveRow(name.isNotBlank() && contact.isNotBlank(), onClose) {
+//                            onAdd(name, note, contact, add)
+//                            onClose()
+//                        }
+//                    }
+//                }
+//            }
+//        }
+//    }
+//}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/GroupsGradingView.kt

@@ -0,0 +1,266 @@
+package com.jaytux.grader.ui
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.IntrinsicSize
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.Button
+import androidx.compose.material3.Checkbox
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.LocalTextStyle
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.PrimaryScrollableTabRow
+import androidx.compose.material3.ProvideTextStyle
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Tab
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontStyle
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.jaytux.grader.GroupGrading
+import com.jaytux.grader.app
+import com.jaytux.grader.data.v2.CategoricGrade
+import com.jaytux.grader.data.v2.Criterion
+import com.jaytux.grader.data.v2.GradeType
+import com.jaytux.grader.data.v2.Group
+import com.jaytux.grader.data.v2.Student
+import com.jaytux.grader.viewmodel.Grade
+import com.jaytux.grader.viewmodel.GroupsGradingVM
+import com.jaytux.grader.viewmodel.Navigator
+import org.jetbrains.exposed.v1.jdbc.transactions.transaction
+import java.util.UUID
+
+@Composable
+fun GroupsGradingTitle(data: GroupGrading) = Text("Courses / ${data.course.name} / ${data.edition.name} / Group Assignments / ${data.assignment.name} / Grading")
+
+@Composable
+fun GroupsGradingView(data: GroupGrading, token: Navigator.NavToken) {
+    val vm = viewModel<GroupsGradingVM>(key = data.assignment.id.toString()) {
+        GroupsGradingVM(data.course, data.edition, data.assignment)
+    }
+    val groups by vm.groupList.entities
+    val focus by vm.focus
+
+    val selectedGroup = remember(focus, groups) { groups.getOrNull(focus) }
+
+    Column(Modifier.padding(10.dp)) {
+        Text("Grading ${vm.base.name}", Modifier.weight(1f), style = MaterialTheme.typography.headlineMedium)
+        Text("Group assignment in ${vm.course.name} - ${vm.edition.name}")
+        Spacer(Modifier.height(5.dp))
+        Row(Modifier.fillMaxSize()) {
+            Surface(Modifier.weight(0.25f).fillMaxHeight(), tonalElevation = 7.dp) {
+                ListOrEmpty(groups, { Text("No groups yet.") }) { idx, it ->
+                    QuickAGroup(idx == focus, { vm.focusGroup(idx) }, it)
+                }
+            }
+
+            Surface(Modifier.weight(0.75f).fillMaxHeight(), tonalElevation = 1.dp) {
+                if (focus == -1 || selectedGroup == null) {
+                    Box(Modifier.weight(0.75f).fillMaxHeight()) {
+                        Text("Select a group to start grading.", Modifier.align(Alignment.Center))
+                    }
+                } else {
+                    Column(Modifier.weight(0.75f).padding(15.dp)) {
+                        Row {
+                            IconButton({ vm.focusPrev() }, Modifier.align(Alignment.CenterVertically), enabled = focus > 0) {
+                                Icon(DoubleBack, "Previous group")
+                            }
+                            Spacer(Modifier.width(10.dp))
+                            Text(selectedGroup.group.name, Modifier.align(Alignment.CenterVertically), style = MaterialTheme.typography.headlineSmall)
+                            Spacer(Modifier.weight(1f))
+                            IconButton({ vm.focusNext() }, Modifier.align(Alignment.CenterVertically), enabled = focus < groups.size - 1) {
+                                Icon(DoubleForward, "Next group")
+                            }
+                        }
+
+                        Spacer(Modifier.height(10.dp))
+
+                        val global by vm.globalGrade.entity
+                        val byCriteria by vm.gradeList.entities
+
+                        Surface(Modifier.fillMaxSize(), color = Color.White, shape = MaterialTheme.shapes.medium) {
+                            LazyColumn {
+                                items(byCriteria ?: listOf()) { (crit, fdbk) ->
+                                    var isOpen by remember(selectedGroup) { mutableStateOf(false) }
+                                    Column(Modifier.padding(5.dp)) {
+                                        GFWidget(crit, selectedGroup.group, fdbk, vm, global to byCriteria, isOpen) { isOpen = !isOpen }
+                                        Spacer(Modifier.height(5.dp))
+                                    }
+                                }
+                                global?.let { fdbk ->
+                                    item {
+                                        Box(Modifier.padding(5.dp)) {
+                                            GFWidget(
+                                                vm.global, selectedGroup.group, fdbk, vm, global to byCriteria, true,
+                                                (byCriteria ?: listOf()).flatMap { (_, it) ->
+                                                    it.overrides.mapNotNull { o ->
+                                                        o.second?.let { _ -> o.first.id.value }
+                                                    }
+                                                }.toSet()
+                                            ) {}
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun QuickAGroup(isFocus: Boolean, onFocus: () -> Unit, group: GroupsGradingVM.GroupData) {
+    Surface(tonalElevation = if(isFocus) 15.dp else 0.dp, shape = MaterialTheme.shapes.small) {
+        Column(Modifier.fillMaxWidth().clickable { onFocus() }.padding(10.dp)) {
+            Text(group.group.name, fontWeight = FontWeight.Bold)
+            Text("${group.students.size} student(s)", Modifier.padding(start = 10.dp), fontStyle = FontStyle.Italic)
+        }
+    }
+}
+
+private fun gradeState(crit: GroupsGradingVM.CritData, current: Grade?): Grade = transaction {
+    if(current == null) Grade.default(crit.criterion.gradeType, crit.cat, crit.num)
+    when(crit.criterion.gradeType) {
+        GradeType.CATEGORIC ->
+            if(current is Grade.Categoric && current.grade.id == crit.criterion.categoricGrade?.id) current
+            else Grade.default(GradeType.CATEGORIC, crit.cat, crit.num)
+        GradeType.NUMERIC ->
+            if(current is Grade.Numeric && current.grade.id == crit.criterion.numericGrade?.id) current
+            else Grade.default(GradeType.NUMERIC, crit.cat, crit.num)
+        GradeType.PERCENTAGE ->
+            current as? Grade.Percentage ?: Grade.default(GradeType.PERCENTAGE, crit.cat, crit.num)
+        GradeType.NONE ->
+            current as? Grade.FreeText ?: Grade.default(GradeType.NONE, crit.cat, crit.num)
+    }
+}
+
+@Composable
+fun GFWidget(crit: GroupsGradingVM.CritData, gr: Group, feedback: GroupsGradingVM.FeedbackData, vm: GroupsGradingVM, key: Any, isOpen: Boolean, markOverridden: Set<UUID> = setOf(), onToggle: () -> Unit) = Surface(
+    Modifier.fillMaxWidth(),
+    shape = MaterialTheme.shapes.medium,
+    shadowElevation = 3.dp
+) {
+    Column {
+        Surface(tonalElevation = 5.dp) {
+            Row(Modifier.fillMaxWidth().clickable { onToggle() }.padding(10.dp)) {
+                Icon(if(isOpen) ChevronDown else ChevronRight, "Toggle criterion detail grading", Modifier.align(Alignment.CenterVertically))
+                Spacer(Modifier.width(5.dp))
+                Text(crit.criterion.name, Modifier.align(Alignment.CenterVertically), style = MaterialTheme.typography.bodyLarge)
+                Spacer(Modifier.width(5.dp))
+                feedback.groupLevel?.grade?.let {
+                    Row(Modifier.align(Alignment.Bottom)) {
+                        ProvideTextStyle(MaterialTheme.typography.bodySmall) {
+                            Text("(Grade: ")
+                            it.render()
+                            Text(")")
+                        }
+                    }
+                }
+            }
+        }
+
+        if(isOpen) {
+            Row(Modifier.padding(10.dp)) {
+                var grade by remember(key, feedback) { mutableStateOf(gradeState(crit, feedback.groupLevel?.grade)) }
+                var text by remember(key, feedback) { mutableStateOf(feedback.groupLevel?.feedback ?: "") }
+                Column(Modifier.weight(0.5f).height(IntrinsicSize.Min)) {
+
+                    GradePicker(grade, key = crit to gr) { grade = it }
+                    Spacer(Modifier.height(5.dp))
+                    OutlinedTextField(text, { text = it }, label = { Text("Feedback") }, singleLine = false, minLines = 5, modifier = Modifier.fillMaxWidth().weight(1f))
+                    Spacer(Modifier.height(5.dp))
+                    Button({ vm.modGroupFeedback(crit.criterion, gr, grade, text) }) {
+                        Text("Save grade and feedback")
+                    }
+                }
+
+                feedback.groupLevel?.let { groupLevel ->
+                    Spacer(Modifier.width(10.dp))
+
+                    Surface(Modifier.weight(0.5f).height(IntrinsicSize.Min), tonalElevation = 10.dp, shape = MaterialTheme.shapes.small) {
+                        Column(Modifier.padding(10.dp)) {
+                            Text("Individual overrides", style = MaterialTheme.typography.bodyLarge)
+                            feedback.overrides.forEach { (student, it) ->
+                                var enable by remember(key, it) { mutableStateOf(false) }
+                                var maybeRemoving by remember(key, it) { mutableStateOf(false) }
+                                var sGrade by remember(key, it) { mutableStateOf(gradeState(crit, it?.grade ?: grade)) }
+                                var sText by remember(key, it) { mutableStateOf(it?.feedback ?: "") }
+
+                                Column {
+                                    Row {
+                                        Checkbox(enable, { if(it) { enable = true } else { maybeRemoving = true } })
+                                        Spacer(Modifier.width(5.dp))
+                                        Text(student.name, Modifier.align(Alignment.CenterVertically))
+                                        if(student.id.value in markOverridden) {
+                                            Spacer(Modifier.width(5.dp))
+                                            Text("(Overridden)", Modifier.align(Alignment.CenterVertically), style = MaterialTheme.typography.bodySmall, fontStyle = FontStyle.Italic, color = Color.Red)
+                                        }
+                                    }
+
+                                    if(enable) Row {
+                                        Spacer(Modifier.width(15.dp))
+                                        Surface(color = Color.White, shape = MaterialTheme.shapes.small) {
+                                            Column(Modifier.padding(10.dp)) {
+                                                Spacer(Modifier.height(5.dp))
+                                                GradePicker(sGrade, key = crit to gr app student) { sGrade = it }
+                                                Spacer(Modifier.height(5.dp))
+                                                OutlinedTextField(sText, { sText = it }, label = { Text("Feedback") }, singleLine = true, modifier = Modifier.fillMaxWidth())
+                                                Spacer(Modifier.height(5.dp))
+                                                Button({ vm.modOverrideFeedback(crit.criterion, gr, student, groupLevel, sGrade, sText) }) {
+                                                    Text("Save override")
+                                                }
+                                            }
+                                        }
+                                    }
+                                }
+
+                                if(maybeRemoving) {
+                                    ConfirmDeleteDialog("the individual grade for ${student.name}", { maybeRemoving = false }, {
+                                        maybeRemoving = false
+                                        enable = false
+                                        vm.rmOverrideFeedback(crit.criterion, gr, student)
+                                    }) {
+                                        Column {
+                                            Row {
+                                                Text("Grade:")
+                                                sGrade.render()
+                                            }
+                                            Row {
+                                                Text("Feedback:")
+                                                if(sText.isBlank()) Text("No feedback", fontStyle = FontStyle.Italic)
+                                                else Text(sText)
+                                            }
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/GroupsView.kt

@@ -0,0 +1,285 @@
+package com.jaytux.grader.ui
+
+import androidx.compose.foundation.BorderStroke
+import androidx.compose.foundation.border
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.draganddrop.dragAndDropSource
+import androidx.compose.foundation.draganddrop.dragAndDropTarget
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.LocalTextStyle
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.ExperimentalComposeUiApi
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draganddrop.DragAndDropEvent
+import androidx.compose.ui.draganddrop.DragAndDropTarget
+import androidx.compose.ui.draganddrop.DragAndDropTransferAction
+import androidx.compose.ui.draganddrop.DragAndDropTransferData
+import androidx.compose.ui.draganddrop.DragAndDropTransferable
+import androidx.compose.ui.draganddrop.awtTransferable
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontStyle
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import com.jaytux.grader.data.v2.Group
+import com.jaytux.grader.data.v2.Student
+import com.jaytux.grader.viewmodel.EditionVM
+import org.jetbrains.exposed.v1.jdbc.transactions.transaction
+import java.awt.datatransfer.DataFlavor
+import java.awt.datatransfer.StringSelection
+import java.awt.datatransfer.Transferable
+import java.util.UUID
+
+@Composable
+fun GroupsView(vm: EditionVM) = Row(Modifier.fillMaxSize()) {
+    val groups by vm.groupList.entities
+    val focus by vm.focusIndex
+    var swappingRole by remember { mutableStateOf(-1) }
+
+    val group = remember(groups, focus) { if(focus != -1) groups[focus] else null }
+    val grades by vm.groupGrades.entities
+
+    Surface(Modifier.weight(0.25f).fillMaxHeight(), tonalElevation = 7.dp) {
+        ListOrEmpty(groups, { Text("No groups yet.") }) { idx, it ->
+            QuickGroup(idx, it, vm)
+        }
+    }
+
+    Surface(Modifier.weight(0.75f).fillMaxHeight(), tonalElevation = 1.dp) {
+        if(group == null) {
+            Box(Modifier.weight(0.75f).fillMaxHeight()) {
+                Text("Select a group to view details.", Modifier.align(Alignment.Center))
+            }
+        }
+        else {
+            Column(Modifier.padding(10.dp)) {
+                Text(group.group.name, style = MaterialTheme.typography.headlineMedium)
+                Spacer(Modifier.height(5.dp))
+                Row(Modifier.padding(5.dp)) {
+                    var showTargetBorder by remember { mutableStateOf(false) }
+                    val ddTarget = remember {
+                        DDTarget({ showTargetBorder = true }, { showTargetBorder = false }, { DDTarget.extractStudent(it) }) {
+                            vm.addStudentToGroup(it, group.group, null)
+                        }
+                    }
+
+                    Column(Modifier.weight(0.75f)) {
+                        Surface(
+                            Modifier.weight(0.5f).then(if(showTargetBorder) Modifier.border(BorderStroke(3.dp, Color.Black)) else Modifier)
+                                .dragAndDropTarget({ true }, target = ddTarget),
+                            shape = MaterialTheme.shapes.medium, color = Color.White, shadowElevation = 1.dp) {
+                            LazyColumn {
+                                item {
+                                    Surface(tonalElevation = 15.dp) {
+                                        Row(Modifier.fillMaxWidth().padding(10.dp)) {
+                                            Text("Members", style = MaterialTheme.typography.headlineSmall, modifier = Modifier.padding(10.dp))
+                                        }
+                                    }
+                                }
+
+                                itemsIndexed(group.members) { idx, (student, role) ->
+                                    Row(Modifier.clickable { vm.focus(student) }.padding(10.dp)) {
+                                        Column(Modifier.weight(1f)) {
+                                            Text(student.name, fontWeight = FontWeight.Bold)
+                                            if(student.contact.isEmpty())
+                                                Text("No contact info.", fontStyle = FontStyle.Italic, color = LocalTextStyle.current.color.copy(alpha = 0.5f))
+                                            else Text(student.contact)
+                                        }
+                                        if(role != null) {
+                                            Surface(Modifier.align(Alignment.CenterVertically), tonalElevation = 5.dp, shape = MaterialTheme.shapes.small) {
+                                                Box(Modifier.clickable { swappingRole = -1 }.clickable { swappingRole = idx }) {
+                                                    Text(role, Modifier.padding(horizontal = 5.dp, vertical = 2.dp), style = MaterialTheme.typography.labelMedium)
+                                                }
+                                            }
+                                        }
+                                        else {
+                                            Text("No role", Modifier.align(Alignment.CenterVertically).clickable { swappingRole = idx }, fontStyle = FontStyle.Italic, color = LocalTextStyle.current.color.copy(alpha = 0.5f))
+                                        }
+                                        IconButton({ vm.rmStudentFromGroup(student, group.group) }, Modifier.align(Alignment.CenterVertically)) {
+                                            Icon(PersonMinus, "Remove ${student.name} from group")
+                                        }
+                                    }
+                                }
+
+                                if(group.members.isEmpty()) {
+                                    item {
+                                        Box(Modifier.fillMaxWidth().padding(vertical = 5.dp)) {
+                                            Text("No members yet.", Modifier.align(Alignment.Center), fontStyle = FontStyle.Italic, color = LocalTextStyle.current.color.copy(alpha = 0.5f))
+                                        }
+                                    }
+                                }
+                            }
+                        }
+
+                        Spacer(Modifier.height(10.dp))
+
+                        Column(Modifier.weight(0.5f)) {
+                            Text("Grade Summary: ", style = MaterialTheme.typography.headlineSmall)
+                            Surface(shape = MaterialTheme.shapes.medium, color = Color.White) {
+                            LazyColumn {
+                                item {
+                                    Surface(tonalElevation = 15.dp) {
+                                        Row(Modifier.padding(10.dp)) {
+                                            Text("Assignment", Modifier.weight(0.66f))
+                                            Text("Grade", Modifier.weight(0.33f))
+                                        }
+                                    }
+                                }
+
+                                items(grades ?: listOf()) {
+                                    Column(Modifier.padding(10.dp)) {
+                                        Row {
+                                            Text(it.first.name, Modifier.weight(0.66f))
+                                            it.second?.render(Modifier.weight(0.33f))
+                                                ?: Text("---", Modifier.weight(0.33f), color = LocalTextStyle.current.color.copy(alpha = 0.5f))
+                                        }
+                                    }
+                                }
+
+                                if((grades ?: listOf()).isEmpty()) {
+                                    item {
+                                        Box(Modifier.fillMaxWidth().padding(vertical = 5.dp)) {
+                                            Text("No grades yet.", Modifier.align(Alignment.Center), fontStyle = FontStyle.Italic, color = LocalTextStyle.current.color.copy(alpha = 0.5f))
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                        }
+                    }
+
+                    Spacer(Modifier.width(10.dp))
+
+                    val available by vm.groupAvailableStudents.entities
+                    Surface(Modifier.weight(0.25f), shape = MaterialTheme.shapes.medium, color = Color.White, shadowElevation = 1.dp) {
+                        LazyColumn {
+                            item {
+                                Surface(tonalElevation = 15.dp) {
+                                    Row(Modifier.fillMaxWidth().padding(10.dp)) {
+                                        Text("Available Students", style = MaterialTheme.typography.headlineSmall, modifier = Modifier.padding(10.dp))
+                                    }
+                                }
+                            }
+
+                            items(available ?: listOf()) { student ->
+                                AvailableStudent(student, group.group, vm)
+                            }
+
+                            if((available ?: listOf()).isEmpty()) {
+                                item {
+                                    Box(Modifier.fillMaxWidth().padding(vertical = 5.dp)) {
+                                        Text("No available students.", Modifier.align(Alignment.Center), fontStyle = FontStyle.Italic, color = LocalTextStyle.current.color.copy(alpha = 0.5f))
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    if(swappingRole != -1) {
+        if(group != null) {
+            val roles by vm.usedRoles.entities
+            RolePicker(roles, group.members[swappingRole].second, { swappingRole = -1 }) { upd ->
+                vm.setStudentRole(group.members[swappingRole].first, group.group, upd)
+            }
+        }
+        else {
+            swappingRole = -1
+        }
+    }
+}
+
+private class DDTarget<T>(val onStart: () -> Unit, val onEnd: () -> Unit, val validator: (Transferable) -> T?, val handle: (T) -> Unit) : DragAndDropTarget {
+    override fun onStarted(event: DragAndDropEvent) {
+        onStart()
+        super.onStarted(event)
+    }
+
+    override fun onEnded(event: DragAndDropEvent) {
+        onEnd()
+        super.onEnded(event)
+    }
+
+    @OptIn(ExperimentalComposeUiApi::class)
+    override fun onDrop(event: DragAndDropEvent): Boolean {
+        println("Action at the target: ${event.action}")
+
+        return validator(event.awtTransferable)?.let {
+            handle(it)
+            true
+        } ?: false
+    }
+
+    companion object {
+        @OptIn(ExperimentalComposeUiApi::class)
+        fun mkStudentTransferable(student: Student) = DragAndDropTransferable(StringSelection("com.jaytux.grader:student:${student.id.value}"))
+
+        fun extractStudent(transf: Transferable): Student? {
+            if(transf.isDataFlavorSupported(DataFlavor.stringFlavor)) {
+                val raw = transf.getTransferData(DataFlavor.stringFlavor) as String
+                val prefix = "com.jaytux.grader:student:"
+                if(raw.startsWith(prefix)) {
+                    val id = UUID.fromString(raw.removePrefix(prefix))
+                    return transaction { Student.findById(id) }
+                }
+            }
+            return null
+        }
+    }
+}
+
+@Composable
+fun QuickGroup(idx: Int, group: EditionVM.GroupData, vm: EditionVM) {
+    val focus by vm.focusIndex
+    Surface(tonalElevation = if(focus == idx) 15.dp else 0.dp, shape = MaterialTheme.shapes.small) {
+        Column(Modifier.fillMaxWidth().clickable { vm.focus(idx) }.padding(10.dp)) {
+            Text(group.group.name, fontWeight = FontWeight.Bold)
+            Text("${group.members.size} member(s)", Modifier.padding(start = 10.dp), fontStyle = FontStyle.Italic)
+        }
+    }
+}
+
+@OptIn(ExperimentalComposeUiApi::class)
+@Composable
+fun AvailableStudent(student: Student, group: Group, vm: EditionVM) {
+    Row(Modifier.padding(10.dp).dragAndDropSource(
+        drawDragDecoration = {},
+    ) {
+        DragAndDropTransferData(
+            transferable = DDTarget.mkStudentTransferable(student),
+            supportedActions = listOf(DragAndDropTransferAction.Move),
+            dragDecorationOffset = it,
+            onTransferCompleted = { act -> println("Source action: $act") }
+        )
+    }) {
+        Text(student.name, Modifier.align(Alignment.CenterVertically).weight(1f), fontWeight = FontWeight.Bold)
+        IconButton({ vm.addStudentToGroup(student, group, null) }) {
+            Icon(CirclePlus, "Add ${student.name} to group")
+        }
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/HomeView.kt

@@ -0,0 +1,147 @@
+package com.jaytux.grader.ui
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.jaytux.grader.EditionDetail
+import com.jaytux.grader.data.v2.Edition
+import com.jaytux.grader.viewmodel.HomeVM
+import com.jaytux.grader.viewmodel.Navigator
+
+@Composable
+fun HomeTitle() = Text("Grader")
+
+@Composable
+fun HomeView(token: Navigator.NavToken) {
+    val vm = viewModel<HomeVM>()
+    val courses by vm.courses.entities
+    var addingCourse by remember { mutableStateOf(false) }
+
+    LazyColumn(Modifier.padding(15.dp)) {
+        item {
+            Row {
+                Text("Courses Overview", Modifier.weight(0.8f), style = MaterialTheme.typography.headlineMedium)
+                Button({ addingCourse = true }) {
+                    Icon(CirclePlus, "Add course")
+                    Spacer(Modifier.width(5.dp))
+                    Text("Add course")
+                }
+            }
+        }
+
+        items(courses) {
+            CourseCard(it, vm) { e -> token.navTo(EditionDetail(e, it.course)) }
+        }
+    }
+
+    if(addingCourse) {
+        AddStringDialog("Course Name", courses.map { it.course.name }, { addingCourse = false }, "") {
+            vm.mkCourse(it)
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun CourseCard(course: HomeVM.CourseData, vm: HomeVM, onOpenEdition: (Edition) -> Unit) {
+    var addingEdition by remember { mutableStateOf(false) }
+    var deleting by remember { mutableStateOf(false) }
+    Surface(shape = MaterialTheme.shapes.medium, tonalElevation = 2.dp, shadowElevation = 5.dp, modifier = Modifier.fillMaxWidth().padding(10.dp)) {
+        Column(Modifier.padding(8.dp)) {
+            Row {
+                Text(course.course.name, style = MaterialTheme.typography.headlineSmall, modifier = Modifier.weight(1f))
+                IconButton({ deleting = true }) { Icon(Delete, "Delete course") }
+            }
+
+            Row {
+                Text("Editions", style = MaterialTheme.typography.headlineSmall, modifier = Modifier.weight(1f))
+                Button({ addingEdition = true }) {
+                    Icon(CirclePlus, "Add edition")
+                    Spacer(Modifier.width(5.dp))
+                    Text("Add edition")
+                }
+            }
+
+            FlowRow(horizontalArrangement = Arrangement.SpaceEvenly) {
+                course.editions.forEach { EditionCard(course.course.name, it, vm, onOpenEdition) }
+            }
+
+            if(course.archived.isNotEmpty()) {
+                Text("Archived editions", style = MaterialTheme.typography.headlineSmall)
+                FlowRow(horizontalArrangement = Arrangement.SpaceEvenly) {
+                    course.archived.forEach { EditionCard(course.course.name, it, vm, onOpenEdition) }
+                }
+            }
+        }
+    }
+
+    if(addingEdition) {
+        AddStringDialog("Edition Name (in ${course.course.name})", course.editions.map { it.edition.name }, { addingEdition = false }, "") {
+            vm.mkEdition(course.course, it)
+        }
+    }
+
+    if(deleting) {
+        ConfirmDeleteDialog("a course", { deleting = false }, { vm.rmCourse(course.course) }) {
+            Text(course.course.name)
+        }
+    }
+}
+
+@Composable
+fun EditionCard(courseName: String, edition: HomeVM.EditionData, vm: HomeVM, onOpen: (Edition) -> Unit) {
+    val type = if(edition.edition.archived) "Archived" else "Active"
+    var deleting by remember { mutableStateOf(false) }
+
+    Surface(shape = MaterialTheme.shapes.medium, tonalElevation = 2.dp, shadowElevation = 5.dp, modifier = Modifier.padding(10.dp).clickable { onOpen(edition.edition) }) {
+        Column(Modifier.padding(10.dp).width(IntrinsicSize.Min)) {
+            Column(Modifier.width(IntrinsicSize.Max)) {
+                Text(edition.edition.name, style = MaterialTheme.typography.headlineSmall)
+                Text(
+                    "$type\n${edition.students.size} student(s) • ${edition.groups.size} group(s) • ${edition.assignments.size} assignment(s)",
+                    style = MaterialTheme.typography.bodyMedium
+                )
+            }
+
+            Spacer(Modifier.height(5.dp))
+            Row {
+                if(edition.edition.archived) {
+                    Button({ vm.unarchiveEdition(edition.edition) }, Modifier.weight(0.5f)) {
+                        Icon(Unarchive, "Unarchive edition")
+                        Spacer(Modifier.width(5.dp))
+                        Text("Unarchive edition")
+                    }
+                }
+                else {
+                    Button({ vm.archiveEdition(edition.edition) }, Modifier.weight(0.5f)) {
+                        Icon(Archive, "Archive edition")
+                        Spacer(Modifier.width(5.dp))
+                        Text("Archive edition")
+                    }
+                }
+                Spacer(Modifier.width(10.dp))
+                Button({ deleting = true }, Modifier.weight(0.5f)) {
+                    Icon(Delete, "Archive edition")
+                    Spacer(Modifier.width(5.dp))
+                    Text("Delete edition")
+                }
+            }
+        }
+    }
+
+    if(deleting) {
+        ConfirmDeleteDialog("an edition", { deleting = false }, { vm.rmEdition(edition.edition) }) {
+            Column {
+                Text(edition.edition.name, Modifier.align(Alignment.CenterHorizontally))
+                Text("Edition in course $courseName", Modifier.align(Alignment.CenterHorizontally))
+            }
+        }
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/PeerEvalsGradingView.kt

@@ -0,0 +1,20 @@
+package com.jaytux.grader.ui
+
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.jaytux.grader.GroupGrading
+import com.jaytux.grader.PeerEvalGrading
+import com.jaytux.grader.viewmodel.GroupsGradingVM
+import com.jaytux.grader.viewmodel.Navigator
+import com.jaytux.grader.viewmodel.PeerEvalsGradingVM
+
+@Composable
+fun PeerEvalsGradingTitle(data: PeerEvalGrading) = Text("Courses / ${data.course.name} / ${data.edition.name} / Peer Evaluations / ${data.assignment.name} / Grading")
+
+@Composable
+fun PeerEvalsGradingView(data: PeerEvalGrading, token: Navigator.NavToken) {
+    val vm = viewModel<PeerEvalsGradingVM>(key = data.assignment.id.toString()) {
+        PeerEvalsGradingVM(data.course, data.edition, data.assignment)
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/RichText.kt

@@ -4,12 +4,6 @@ import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyRow
 import androidx.compose.foundation.shape.CircleShape
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.automirrored.outlined.FormatListBulleted
-import androidx.compose.material.icons.filled.Circle
-import androidx.compose.material.icons.filled.ContentCopy
-import androidx.compose.material.icons.filled.ContentPaste
-import androidx.compose.material.icons.outlined.*
 import androidx.compose.material3.*
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.rememberCoroutineScope
@@ -18,6 +12,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.focus.focusProperties
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.platform.LocalClipboard
 import androidx.compose.ui.platform.LocalClipboardManager
 import androidx.compose.ui.text.SpanStyle
 import androidx.compose.ui.text.font.FontStyle
@@ -29,13 +24,14 @@ import com.jaytux.grader.loadClipboard
 import com.jaytux.grader.toClipboard
 import com.mohamedrejeb.richeditor.model.RichTextState
 import com.mohamedrejeb.richeditor.ui.material.OutlinedRichTextEditor
+import kotlinx.coroutines.launch
 
 @Composable
 fun RichTextStyleRow(
     modifier: Modifier = Modifier,
     state: RichTextState,
 ) {
-    val clip = LocalClipboardManager.current
+    val clip = LocalClipboardManager.current // I know this is deprecated, but I won't figure out the Clipboard API now
     val scope = rememberCoroutineScope()
 
     Row(modifier.fillMaxWidth()) {
@@ -53,7 +49,7 @@ fun RichTextStyleRow(
                         )
                     },
                     isSelected = state.currentSpanStyle.fontWeight == FontWeight.Bold,
-                    icon = Icons.Outlined.FormatBold
+                    icon = FormatBold
                 )
             }
 
@@ -67,7 +63,7 @@ fun RichTextStyleRow(
                         )
                     },
                     isSelected = state.currentSpanStyle.fontStyle == FontStyle.Italic,
-                    icon = Icons.Outlined.FormatItalic
+                    icon = FormatItalic
                 )
             }
 
@@ -81,7 +77,7 @@ fun RichTextStyleRow(
                         )
                     },
                     isSelected = state.currentSpanStyle.textDecoration?.contains(TextDecoration.Underline) == true,
-                    icon = Icons.Outlined.FormatUnderlined
+                    icon = FormatUnderline
                 )
             }
 
@@ -95,7 +91,7 @@ fun RichTextStyleRow(
                         )
                     },
                     isSelected = state.currentSpanStyle.textDecoration?.contains(TextDecoration.LineThrough) == true,
-                    icon = Icons.Outlined.FormatStrikethrough
+                    icon = FormatStrikethrough
                 )
             }
 
@@ -109,7 +105,7 @@ fun RichTextStyleRow(
                         )
                     },
                     isSelected = state.currentSpanStyle.fontSize == 28.sp,
-                    icon = Icons.Outlined.FormatSize
+                    icon = FormatSize
                 )
             }
 
@@ -123,7 +119,7 @@ fun RichTextStyleRow(
                         )
                     },
                     isSelected = state.currentSpanStyle.color == Color.Red,
-                    icon = Icons.Filled.Circle,
+                    icon = CircleFilled,
                     tint = Color.Red
                 )
             }
@@ -138,7 +134,7 @@ fun RichTextStyleRow(
                         )
                     },
                     isSelected = state.currentSpanStyle.background == Color.Yellow,
-                    icon = Icons.Outlined.Circle,
+                    icon = CircleOutline,
                     tint = Color.Yellow
                 )
             }
@@ -158,7 +154,7 @@ fun RichTextStyleRow(
                         state.toggleUnorderedList()
                     },
                     isSelected = state.isUnorderedList,
-                    icon = Icons.AutoMirrored.Outlined.FormatListBulleted,
+                    icon = FormatListBullet,
                 )
             }
 
@@ -168,7 +164,7 @@ fun RichTextStyleRow(
                         state.toggleOrderedList()
                     },
                     isSelected = state.isOrderedList,
-                    icon = Icons.Outlined.FormatListNumbered,
+                    icon = FormatListNumber,
                 )
             }
 
@@ -187,16 +183,16 @@ fun RichTextStyleRow(
                         state.toggleCodeSpan()
                     },
                     isSelected = state.isCodeSpan,
-                    icon = Icons.Outlined.Code,
+                    icon = FormatCode,
                 )
             }
         }
 
-        IconButton({ state.toClipboard(clip) }) {
-            Icon(Icons.Default.ContentCopy, contentDescription = "Copy markdown")
+        IconButton({ scope.launch { state.toClipboard(clip) } }) {
+            Icon(ContentCopy, contentDescription = "Copy markdown")
         }
-        IconButton({ state.loadClipboard(clip, scope) }) {
-            Icon(Icons.Default.ContentPaste, contentDescription = "Paste markdown")
+        IconButton({ scope.launch { state.loadClipboard(clip, scope) } }) {
+            Icon(ContentPaste, contentDescription = "Paste markdown")
         }
     }
 }

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/SolosGradingView.kt

@@ -0,0 +1,20 @@
+package com.jaytux.grader.ui
+
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.jaytux.grader.GroupGrading
+import com.jaytux.grader.SoloGrading
+import com.jaytux.grader.viewmodel.GroupsGradingVM
+import com.jaytux.grader.viewmodel.Navigator
+import com.jaytux.grader.viewmodel.SolosGradingVM
+
+@Composable
+fun SolosGradingTitle(data: SoloGrading) = Text("Courses / ${data.course.name} / ${data.edition.name} / Individual Assignments / ${data.assignment.name} / Grading")
+
+@Composable
+fun SolosGradingView(data: SoloGrading, token: Navigator.NavToken) {
+    val vm = viewModel<SolosGradingVM>(key = data.assignment.id.toString()) {
+        SolosGradingVM(data.course, data.edition, data.assignment)
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/StudentsView.kt

@@ -0,0 +1,193 @@
+package com.jaytux.grader.ui
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.FlowRow
+import androidx.compose.foundation.layout.IntrinsicSize
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.Button
+import androidx.compose.material3.Icon
+import androidx.compose.material3.LocalTextStyle
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextField
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontStyle
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import com.jaytux.grader.data.v2.Edition
+import com.jaytux.grader.data.v2.Student
+import com.jaytux.grader.viewmodel.EditionVM
+
+@Composable
+fun StudentsView(vm: EditionVM) = Row(Modifier.fillMaxSize()) {
+    val students by vm.studentList.entities
+    val focus by vm.focusIndex
+
+    Surface(Modifier.weight(0.25f).fillMaxHeight(), tonalElevation = 7.dp) {
+        ListOrEmpty(students, { Text("No students yet.") }) { idx, it ->
+            QuickStudent(idx, it, vm)
+        }
+    }
+
+    Surface(Modifier.weight(0.75f).fillMaxHeight(), tonalElevation = 1.dp) {
+        if(focus == -1) {
+            Box(Modifier.weight(0.75f).fillMaxHeight()) {
+                Text("Select a student to view details.", Modifier.align(Alignment.Center))
+            }
+        }
+        else {
+            val groups by vm.studentGroups.entities
+            val grades by vm.studentGrades.entities
+
+            Column(Modifier.weight(0.75f).padding(15.dp)) {
+                Surface(Modifier.padding(10.dp).fillMaxWidth(), tonalElevation = 10.dp, shadowElevation = 2.dp, shape = MaterialTheme.shapes.medium) {
+                    Column(Modifier.padding(10.dp)) {
+                        Text(students[focus].name, style = MaterialTheme.typography.headlineSmall)
+                        Row {
+                            var editing by remember { mutableStateOf(false) }
+
+                            Text("Contact: ", Modifier.align(Alignment.CenterVertically).padding(start = 15.dp))
+                            if(!editing) {
+                                if (students[focus].contact.isBlank()) Text(
+                                    "No contact info.",
+                                    Modifier.padding(start = 5.dp),
+                                    fontStyle = FontStyle.Italic,
+                                    color = LocalTextStyle.current.color.copy(alpha = 0.5f)
+                                )
+                                else Text(students[focus].contact, Modifier.padding(start = 5.dp))
+                                Spacer(Modifier.width(5.dp))
+                                Icon(Edit, "Edit contact info", Modifier.clickable { editing = true })
+                            }
+                            else {
+                                var mod by remember(focus, students[focus].contact, students[focus].id.value) { mutableStateOf(students[focus].contact) }
+                                OutlinedTextField(mod, { mod = it })
+                                Spacer(Modifier.width(5.dp))
+                                Icon(Check, "Confirm edit", Modifier.align(Alignment.CenterVertically).clickable {
+                                    vm.modStudent(students[focus], null, mod, null)
+                                    editing = false
+                                })
+                                Spacer(Modifier.width(5.dp))
+                                Icon(Close, "Cancel edit", Modifier.align(Alignment.CenterVertically).clickable { editing = false })
+                            }
+                        }
+
+                        Column {
+                            Text("Groups:", style = MaterialTheme.typography.headlineSmall)
+                            groups?.let { gList ->
+                                if(gList.isEmpty()) null
+                                else {
+                                    FlowRow(Modifier.padding(start = 10.dp), horizontalArrangement = Arrangement.SpaceEvenly) {
+                                        gList.forEach { group ->
+                                            Surface(tonalElevation = 15.dp, shadowElevation = 1.dp, shape = MaterialTheme.shapes.small) {
+                                                Box(Modifier.padding(5.dp).clickable { vm.focus(group.first) }) {
+                                                    Text("${group.first.name} (${group.second ?: "no role"})", Modifier.padding(5.dp))
+                                                }
+                                            }
+                                        }
+                                    }
+                                }
+                            } ?: Text("Not a member of any group.", Modifier.padding(start = 15.dp), fontStyle = FontStyle.Italic, color = LocalTextStyle.current.color.copy(alpha = 0.5f))
+                        }
+                    }
+                }
+                Row {
+                    Column(Modifier.weight(0.33f)) {
+                        var mod by remember(focus, students[focus].note, students[focus].id.value) { mutableStateOf(students[focus].note) }
+
+                        Text("Internal Note:")
+                        OutlinedTextField(
+                            mod,
+                            { mod = it },
+                            singleLine = false,
+                            minLines = 5,
+                            modifier = Modifier.fillMaxWidth()
+                        )
+                        if(mod != students[focus].note) {
+                            Row {
+                                Spacer(Modifier.weight(1f))
+                                Button({ vm.modStudent(students[focus], null, null, mod) }) {
+                                    Text("Update note")
+                                }
+                            }
+                        }
+                    }
+                    Spacer(Modifier.width(10.dp))
+                    Column(Modifier.weight(0.66f)) {
+                        Text("Grade Summary: ", style = MaterialTheme.typography.headlineSmall)
+                        Surface(shape = MaterialTheme.shapes.medium, color = Color.White) {
+                            LazyColumn {
+                                item {
+                                    Surface(tonalElevation = 15.dp) {
+                                        Row(Modifier.padding(10.dp)) {
+                                            Text("Assignment", Modifier.weight(0.66f))
+                                            Text("Grade", Modifier.weight(0.33f))
+                                        }
+                                    }
+                                }
+
+                                items(grades ?: listOf()) {
+                                    Column(Modifier.padding(10.dp)) {
+                                        Row {
+                                            Text(it.assignment.name, Modifier.weight(0.66f))
+                                            it.grade?.render(Modifier.weight(0.33f))
+                                                ?: Text("---", Modifier.weight(0.33f), color = LocalTextStyle.current.color.copy(alpha = 0.5f))
+                                        }
+
+                                        it.asMember?.let { g ->
+                                            Row(Modifier.padding(start = 10.dp)) {
+                                                Text("As member of ${g.name}", fontStyle = FontStyle.Italic)
+                                                if (it.overridden) Text(" (overridden)", fontStyle = FontStyle.Italic)
+                                            }
+                                        }
+                                    }
+                                }
+
+                                if((grades ?: listOf()).isEmpty()) {
+                                    item {
+                                        Box(Modifier.fillMaxWidth().padding(vertical = 5.dp)) {
+                                            Text("No grades yet.", Modifier.align(Alignment.Center), fontStyle = FontStyle.Italic, color = LocalTextStyle.current.color.copy(alpha = 0.5f))
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun QuickStudent(idx: Int, student: Student, vm: EditionVM) {
+    val focus by vm.focusIndex
+    Surface(tonalElevation = if(focus == idx) 15.dp else 0.dp, shape = MaterialTheme.shapes.small) {
+        Column(Modifier.fillMaxWidth().clickable { vm.focus(idx) }.padding(10.dp)) {
+            Text(student.name, fontWeight = FontWeight.Bold)
+            if(student.contact.isBlank())
+                Text("No contact info.", fontStyle = FontStyle.Italic, color = LocalTextStyle.current.color.copy(alpha = 0.5f))
+            else Text(student.contact)
+        }
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/Views.kt

@@ -1,220 +1,200 @@
 package com.jaytux.grader.ui
 
-import androidx.compose.foundation.clickable
-import androidx.compose.foundation.layout.*
-import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.items
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Delete
-import androidx.compose.material.icons.filled.Edit
-import androidx.compose.material3.*
-import androidx.compose.runtime.*
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.unit.DpSize
-import androidx.compose.ui.unit.dp
-import androidx.compose.ui.window.DialogWindow
-import androidx.compose.ui.window.WindowPosition
-import androidx.compose.ui.window.rememberDialogState
-import com.jaytux.grader.maxN
-import com.jaytux.grader.viewmodel.GroupState
-import com.jaytux.grader.viewmodel.StudentState
 
-@Composable
-fun StudentView(state: StudentState, nav: Navigators) {
-    val groups by state.groups.entities
-    val courses by state.courseEditions.entities
-    val groupGrades by state.groupGrades.entities
-    val soloGrades by state.soloGrades.entities
-
-    Column(Modifier.padding(10.dp)) {
-        Row {
-            Column(Modifier.weight(0.45f)) {
-                Column(Modifier.padding(10.dp).weight(0.35f)) {
-                    Spacer(Modifier.height(10.dp))
-                    InteractToEdit(state.student.name, { state.update { this.name = it } }, "Name")
-                    InteractToEdit(state.student.contact, { state.update { this.contact = it } }, "Contact")
-                    InteractToEdit(state.student.note, { state.update { this.note = it } }, "Note", singleLine = false)
-                }
-                Column(Modifier.weight(0.20f)) {
-                    Text("Courses", style = MaterialTheme.typography.headlineSmall)
-                    ListOrEmpty(courses, { Text("Not a member of any course") }) { _, it ->
-                        val (ed, course) = it
-                        Text("${course.name} (${ed.name})", style = MaterialTheme.typography.bodyMedium)
-                    }
-                }
-                Column(Modifier.weight(0.45f)) {
-                    Text("Groups", style = MaterialTheme.typography.headlineSmall)
-                    ListOrEmpty(groups, { Text("Not a member of any group") }) { _, it ->
-                        val (group, c) = it
-                        val (course, ed) = c
-                        Row(Modifier.clickable { nav.group(group) }) {
-                            Text(group.name, style = MaterialTheme.typography.bodyMedium)
-                            Spacer(Modifier.width(5.dp))
-                            Text(
-                                "(in course $course ($ed))",
-                                Modifier.align(Alignment.Bottom),
-                                style = MaterialTheme.typography.bodySmall
-                            )
-                        }
-
-                    }
-                }
-            }
-            Column(Modifier.weight(0.55f)) {
-                Text("Courses", style = MaterialTheme.typography.headlineSmall)
-                LazyColumn {
-                    item {
-                        Text("As group member", fontWeight = FontWeight.Bold)
-                    }
-                    items(groupGrades) {
-                        groupGradeWidget(it)
-                    }
-
-                    item {
-                        Text("Solo assignments", fontWeight = FontWeight.Bold)
-                    }
-                    items(soloGrades) {
-                        soloGradeWidget(it)
-                    }
-                }
-            }
-        }
-    }
-}
-
-@Composable
-fun groupGradeWidget(gg: StudentState.LocalGroupGrade) {
-    val (group, assignment, gGrade, iGrade) = gg
-    var expanded by remember { mutableStateOf(false) }
-    Row(Modifier.padding(5.dp)) {
-        Spacer(Modifier.width(10.dp))
-        Surface(
-            Modifier.clickable { expanded = !expanded }.fillMaxWidth(),
-            tonalElevation = 5.dp,
-            shape = MaterialTheme.shapes.medium
-        ) {
-            Column(Modifier.padding(5.dp)) {
-                Text("${assignment.maxN(25)} (${iGrade ?: gGrade ?: "no grade yet"})")
-
-                if (expanded) {
-                    Row {
-                        Spacer(Modifier.width(10.dp))
-                        Column {
-                            ItalicAndNormal("Assignment: ", assignment)
-                            ItalicAndNormal("Group name: ", group)
-                            ItalicAndNormal("Group grade: ", gGrade ?: "no grade yet")
-                            ItalicAndNormal("Individual grade: ", iGrade ?: "no individual grade")
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
-
-@Composable
-fun soloGradeWidget(sg: StudentState.LocalSoloGrade) {
-    val (assignment, grade) = sg
-    var expanded by remember { mutableStateOf(false) }
-    Row(Modifier.padding(5.dp)) {
-        Spacer(Modifier.width(10.dp))
-        Surface(
-            Modifier.clickable { expanded = !expanded }.fillMaxWidth(),
-            tonalElevation = 5.dp,
-            shape = MaterialTheme.shapes.medium
-        ) {
-            Column(Modifier.padding(5.dp)) {
-                Text("${assignment.maxN(25)} (${grade ?: "no grade yet"})")
-
-                if (expanded) {
-                    Row {
-                        Spacer(Modifier.width(10.dp))
-                        Column {
-                            ItalicAndNormal("Assignment: ", assignment)
-                            ItalicAndNormal("Individual grade: ", grade ?: "no grade yet")
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
-
-@Composable
-fun GroupView(state: GroupState, nav: Navigators) {
-    val members by state.members.entities
-    val available by state.availableStudents.entities
-    val allRoles by state.roles.entities
-
-    var pickRole: Pair<String?, (String?) -> Unit>? by remember { mutableStateOf(null) }
-
-    Column(Modifier.padding(10.dp)) {
-        Row {
-            Column(Modifier.weight(0.5f)) {
-                Text("Students", style = MaterialTheme.typography.headlineSmall)
-                ListOrEmpty(members, { Text("No students in this group") }) { _, it ->
-                    val (student, role) = it
-                    Row(Modifier.clickable { nav.student(student) }) {
-                        Text(
-                            "${student.name} (${role ?: "no role"})",
-                            Modifier.weight(0.75f).align(Alignment.CenterVertically),
-                            style = MaterialTheme.typography.bodyMedium
-                        )
-                        IconButton({ pickRole = role to { r -> state.updateRole(student, r) } }, Modifier.weight(0.12f)) {
-                            Icon(Icons.Default.Edit, "Change role")
-                        }
-                        IconButton({ state.removeStudent(student) }, Modifier.weight(0.12f)) {
-                            Icon(Icons.Default.Delete, "Remove student")
-                        }
-                    }
-                }
-            }
-            Column(Modifier.weight(0.5f)) {
-                Text("Available students", style = MaterialTheme.typography.headlineSmall)
-                ListOrEmpty(available, { Text("No students available") }) { _, it ->
-                    Row(Modifier.padding(5.dp).clickable { nav.student(it) }) {
-                        IconButton({ state.addStudent(it) }) {
-                            Icon(ChevronLeft, "Add student")
-                        }
-                        Text(it.name, Modifier.weight(0.75f).align(Alignment.CenterVertically), style = MaterialTheme.typography.bodyMedium)
-                    }
-                }
-            }
-        }
-    }
-
-    pickRole?.let {
-        val (curr, onPick) = it
-        RolePicker(allRoles, curr, { pickRole = null }, { role -> onPick(role); pickRole = null })
-    }
-}
-
-@Composable
-fun RolePicker(used: List<String>, curr: String?, onClose: () -> Unit, onSave: (String?) -> Unit) = DialogWindow(
-    onCloseRequest = onClose,
-    state = rememberDialogState(size = DpSize(400.dp, 500.dp), position = WindowPosition(Alignment.Center))
-) {
-    Surface(Modifier.fillMaxSize().padding(10.dp)) {
-        Box(Modifier.fillMaxSize()) {
-            var role by remember { mutableStateOf(curr ?: "") }
-            Column {
-                Text("Used roles:")
-                LazyColumn(Modifier.weight(1.0f).padding(5.dp)) {
-                    items(used) {
-                        Surface(Modifier.fillMaxWidth().clickable { role = it }, tonalElevation = 5.dp) {
-                            Text(it, Modifier.padding(5.dp))
-                        }
-                        Spacer(Modifier.height(5.dp))
-                    }
-                }
-                OutlinedTextField(role, { role = it }, Modifier.fillMaxWidth())
-                CancelSaveRow(true, onClose) {
-                    onSave(role.ifBlank { null })
-                    onClose()
-                }
-            }
-        }
-    }
-}
+//@Composable
+//fun StudentView(state: StudentState, nav: Navigators) {
+//    val groups by state.groups.entities
+//    val courses by state.courseEditions.entities
+//    val groupGrades by state.groupGrades.entities
+//    val soloGrades by state.soloGrades.entities
+//
+//    Column(Modifier.padding(10.dp)) {
+//        Row {
+//            Column(Modifier.weight(0.45f)) {
+//                Column(Modifier.padding(10.dp).weight(0.35f)) {
+//                    Spacer(Modifier.height(10.dp))
+//                    InteractToEdit(state.student.name, { state.update { this.name = it } }, "Name")
+//                    InteractToEdit(state.student.contact, { state.update { this.contact = it } }, "Contact")
+//                    InteractToEdit(state.student.note, { state.update { this.note = it } }, "Note", singleLine = false)
+//                }
+//                Column(Modifier.weight(0.20f)) {
+//                    Text("Courses", style = MaterialTheme.typography.headlineSmall)
+//                    ListOrEmpty(courses, { Text("Not a member of any course") }) { _, it ->
+//                        val (ed, course) = it
+//                        Text("${course.name} (${ed.name})", style = MaterialTheme.typography.bodyMedium)
+//                    }
+//                }
+//                Column(Modifier.weight(0.45f)) {
+//                    Text("Groups", style = MaterialTheme.typography.headlineSmall)
+//                    ListOrEmpty(groups, { Text("Not a member of any group") }) { _, it ->
+//                        val (group, c) = it
+//                        val (course, ed) = c
+//                        Row(Modifier.clickable { nav.group(group) }) {
+//                            Text(group.name, style = MaterialTheme.typography.bodyMedium)
+//                            Spacer(Modifier.width(5.dp))
+//                            Text(
+//                                "(in course $course ($ed))",
+//                                Modifier.align(Alignment.Bottom),
+//                                style = MaterialTheme.typography.bodySmall
+//                            )
+//                        }
+//
+//                    }
+//                }
+//            }
+//            Column(Modifier.weight(0.55f)) {
+//                Text("Courses", style = MaterialTheme.typography.headlineSmall)
+//                LazyColumn {
+//                    item {
+//                        Text("As group member", fontWeight = FontWeight.Bold)
+//                    }
+//                    items(groupGrades) {
+//                        groupGradeWidget(it)
+//                    }
+//
+//                    item {
+//                        Text("Solo assignments", fontWeight = FontWeight.Bold)
+//                    }
+//                    items(soloGrades) {
+//                        soloGradeWidget(it)
+//                    }
+//                }
+//            }
+//        }
+//    }
+//}
+//
+//@Composable
+//fun groupGradeWidget(gg: StudentState.LocalGroupGrade) {
+//    val (group, assignment, gGrade, iGrade) = gg
+//    var expanded by remember { mutableStateOf(false) }
+//    Row(Modifier.padding(5.dp)) {
+//        Spacer(Modifier.width(10.dp))
+//        Surface(
+//            Modifier.clickable { expanded = !expanded }.fillMaxWidth(),
+//            tonalElevation = 5.dp,
+//            shape = MaterialTheme.shapes.medium
+//        ) {
+//            Column(Modifier.padding(5.dp)) {
+//                Text("${assignment.maxN(25)} (${iGrade ?: gGrade ?: "no grade yet"})")
+//
+//                if (expanded) {
+//                    Row {
+//                        Spacer(Modifier.width(10.dp))
+//                        Column {
+//                            ItalicAndNormal("Assignment: ", assignment)
+//                            ItalicAndNormal("Group name: ", group)
+//                            ItalicAndNormal("Group grade: ", gGrade ?: "no grade yet")
+//                            ItalicAndNormal("Individual grade: ", iGrade ?: "no individual grade")
+//                        }
+//                    }
+//                }
+//            }
+//        }
+//    }
+//}
+//
+//@Composable
+//fun soloGradeWidget(sg: StudentState.LocalSoloGrade) {
+//    val (assignment, grade) = sg
+//    var expanded by remember { mutableStateOf(false) }
+//    Row(Modifier.padding(5.dp)) {
+//        Spacer(Modifier.width(10.dp))
+//        Surface(
+//            Modifier.clickable { expanded = !expanded }.fillMaxWidth(),
+//            tonalElevation = 5.dp,
+//            shape = MaterialTheme.shapes.medium
+//        ) {
+//            Column(Modifier.padding(5.dp)) {
+//                Text("${assignment.maxN(25)} (${grade ?: "no grade yet"})")
+//
+//                if (expanded) {
+//                    Row {
+//                        Spacer(Modifier.width(10.dp))
+//                        Column {
+//                            ItalicAndNormal("Assignment: ", assignment)
+//                            ItalicAndNormal("Individual grade: ", grade ?: "no grade yet")
+//                        }
+//                    }
+//                }
+//            }
+//        }
+//    }
+//}
+//
+//@Composable
+//fun GroupView(state: GroupState, nav: Navigators) {
+//    val members by state.members.entities
+//    val available by state.availableStudents.entities
+//    val allRoles by state.roles.entities
+//
+//    var pickRole: Pair<String?, (String?) -> Unit>? by remember { mutableStateOf(null) }
+//
+//    Column(Modifier.padding(10.dp)) {
+//        Row {
+//            Column(Modifier.weight(0.5f)) {
+//                Text("Students", style = MaterialTheme.typography.headlineSmall)
+//                ListOrEmpty(members, { Text("No students in this group") }) { _, it ->
+//                    val (student, role) = it
+//                    Row(Modifier.clickable { nav.student(student) }) {
+//                        Text(
+//                            "${student.name} (${role ?: "no role"})",
+//                            Modifier.weight(0.75f).align(Alignment.CenterVertically),
+//                            style = MaterialTheme.typography.bodyMedium
+//                        )
+//                        IconButton({ pickRole = role to { r -> state.updateRole(student, r) } }, Modifier.weight(0.12f)) {
+//                            Icon(Icons.Default.Edit, "Change role")
+//                        }
+//                        IconButton({ state.removeStudent(student) }, Modifier.weight(0.12f)) {
+//                            Icon(Icons.Default.Delete, "Remove student")
+//                        }
+//                    }
+//                }
+//            }
+//            Column(Modifier.weight(0.5f)) {
+//                Text("Available students", style = MaterialTheme.typography.headlineSmall)
+//                ListOrEmpty(available, { Text("No students available") }) { _, it ->
+//                    Row(Modifier.padding(5.dp).clickable { nav.student(it) }) {
+//                        IconButton({ state.addStudent(it) }) {
+//                            Icon(ChevronLeft, "Add student")
+//                        }
+//                        Text(it.name, Modifier.weight(0.75f).align(Alignment.CenterVertically), style = MaterialTheme.typography.bodyMedium)
+//                    }
+//                }
+//            }
+//        }
+//    }
+//
+//    pickRole?.let {
+//        val (curr, onPick) = it
+//        RolePicker(allRoles, curr, { pickRole = null }, { role -> onPick(role); pickRole = null })
+//    }
+//}
+//
+//@Composable
+//fun RolePicker(used: List<String>, curr: String?, onClose: () -> Unit, onSave: (String?) -> Unit) = DialogWindow(
+//    onCloseRequest = onClose,
+//    state = rememberDialogState(size = DpSize(400.dp, 500.dp), position = WindowPosition(Alignment.Center))
+//) {
+//    Surface(Modifier.fillMaxSize().padding(10.dp)) {
+//        Box(Modifier.fillMaxSize()) {
+//            var role by remember { mutableStateOf(curr ?: "") }
+//            Column {
+//                Text("Used roles:")
+//                LazyColumn(Modifier.weight(1.0f).padding(5.dp)) {
+//                    items(used) {
+//                        Surface(Modifier.fillMaxWidth().clickable { role = it }, tonalElevation = 5.dp) {
+//                            Text(it, Modifier.padding(5.dp))
+//                        }
+//                        Spacer(Modifier.height(5.dp))
+//                    }
+//                }
+//                OutlinedTextField(role, { role = it }, Modifier.fillMaxWidth())
+//                CancelSaveRow(true, onClose) {
+//                    onSave(role.ifBlank { null })
+//                    onClose()
+//                }
+//            }
+//        }
+//    }
+//}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/ui/Widgets.kt

@@ -1,45 +1,34 @@
 package com.jaytux.grader.ui
 
-import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
-import androidx.compose.foundation.lazy.*
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Check
-import androidx.compose.material.icons.filled.Delete
-import androidx.compose.material.icons.filled.Edit
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyItemScope
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.TransformOrigin
 import androidx.compose.ui.graphics.graphicsLayer
-import androidx.compose.ui.input.key.Key
-import androidx.compose.ui.input.key.KeyEvent
-import androidx.compose.ui.input.key.key
-import androidx.compose.ui.input.key.onKeyEvent
-import androidx.compose.ui.layout.SubcomposeLayout
-import androidx.compose.ui.layout.layout
 import androidx.compose.ui.layout.onGloballyPositioned
-import androidx.compose.ui.text.TextRange
-import androidx.compose.ui.text.capitalize
 import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.text.input.TextFieldValue
-import androidx.compose.ui.text.intl.Locale
-import androidx.compose.ui.unit.*
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.DpSize
+import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.*
-import com.jaytux.grader.data.Course
-import com.jaytux.grader.data.Edition
-import com.jaytux.grader.viewmodel.PeerEvaluationState
-import com.mohamedrejeb.richeditor.model.RichTextState
-import kotlinx.coroutines.delay
-import kotlinx.coroutines.launch
+import com.jaytux.grader.maxN
+import com.jaytux.grader.viewmodel.Grade
 import kotlinx.datetime.*
 import kotlinx.datetime.TimeZone
 import java.util.*
+import kotlin.time.toJavaInstant
 
 @Composable
 fun CancelSaveRow(canSave: Boolean, onCancel: () -> Unit, cancelText: String = "Cancel", saveText: String = "Save", onSave: () -> Unit) {
@@ -50,37 +39,18 @@ fun CancelSaveRow(canSave: Boolean, onCancel: () -> Unit, cancelText: String = "
     }
 }
 
-@Composable
-fun <T> TabLayout(
-    options: List<T>,
-    currentIndex: Int,
-    onSelect: (Int) -> Unit,
-    optionContent: @Composable (T) -> Unit,
-    modifier: Modifier = Modifier,
-    content: @Composable () -> Unit
-) = Column(modifier) {
-    TabRow(currentIndex) {
-        options.forEachIndexed { idx, it ->
-            Tab(
-                selected = idx == currentIndex,
-                onClick = { onSelect(idx) },
-                text = { optionContent(it) }
-            )
-        }
-    }
-    content()
-}
-
 @Composable
 fun AddStringDialog(label: String, taken: List<String>, onClose: () -> Unit, current: String = "", onSave: (String) -> Unit) = DialogWindow(
     onCloseRequest = onClose,
     state = rememberDialogState(size = DpSize(400.dp, 300.dp), position = WindowPosition(Alignment.Center))
 ) {
+    val focus = remember { FocusRequester() }
+
     Surface(Modifier.fillMaxSize()) {
         Box(Modifier.fillMaxSize().padding(10.dp)) {
             var name by remember(current) { mutableStateOf(current) }
             Column(Modifier.align(Alignment.Center)) {
-                OutlinedTextField(name, { name = it }, Modifier.fillMaxWidth(), label = { Text(label) }, isError = name in taken)
+                OutlinedTextField(name, { name = it }, Modifier.fillMaxWidth().focusRequester(focus), label = { Text(label) }, isError = name in taken)
                 CancelSaveRow(name.isNotBlank() && name !in taken, onClose) {
                     onSave(name)
                     onClose()
@@ -88,6 +58,8 @@ fun AddStringDialog(label: String, taken: List<String>, onClose: () -> Unit, cur
             }
         }
     }
+
+    LaunchedEffect(Unit) { focus.requestFocus() }
 }
 
 @Composable
@@ -118,299 +90,25 @@ fun ConfirmDeleteDialog(
 fun <T> ListOrEmpty(
     data: List<T>,
     onEmpty: @Composable ColumnScope.() -> Unit,
-    addOptions: @Composable ColumnScope.() -> Unit,
-    addAfterLazy: Boolean = true,
+    modifier: Modifier = Modifier,
     item: @Composable LazyItemScope.(idx: Int, it: T) -> Unit
 ) {
     if(data.isEmpty()) {
-        Box(Modifier.fillMaxSize()) {
-            Column(Modifier.align(Alignment.Center)) {
-                onEmpty()
-                addOptions()
+        Box(modifier) {
+            Box(Modifier.fillMaxSize()) {
+                Column(Modifier.align(Alignment.Center)) {
+                    onEmpty()
+                }
             }
         }
     }
     else {
-        Column {
+        Column(modifier) {
             LazyColumn(Modifier.weight(1f)) {
                 itemsIndexed(data) { idx, it ->
                     item(idx, it)
                 }
-
-                if(!addAfterLazy) item { addOptions() }
             }
-            if(addAfterLazy) addOptions()
-        }
-    }
-}
-
-@Composable
-fun <T> ListOrEmpty(
-    data: List<T>,
-    emptyText: @Composable ColumnScope.() -> Unit,
-    addText: @Composable RowScope.() -> Unit,
-    onAdd: () -> Unit,
-    addAfterLazy: Boolean = true,
-    item: @Composable LazyItemScope.(idx: Int, it: T) -> Unit
-) = ListOrEmpty(
-    data, emptyText,
-    { Button(onAdd, Modifier.align(Alignment.CenterHorizontally).fillMaxWidth()) { addText() } },
-    addAfterLazy,
-    item
-)
-
-@Composable
-fun <T> ListOrEmpty(
-    data: List<T>,
-    emptyText: @Composable ColumnScope.() -> Unit,
-    item: @Composable LazyItemScope.(idx: Int, it: T) -> Unit
-) {
-    if(data.isEmpty()) {
-        Box(Modifier.fillMaxSize()) {
-            Column(Modifier.align(Alignment.Center)) {
-                emptyText()
-            }
-        }
-    }
-    else {
-        Column {
-            LazyColumn(Modifier.padding(5.dp).weight(1f)) {
-                itemsIndexed(data) { idx, it ->
-                    item(idx, it)
-                }
-            }
-        }
-    }
-}
-
-@Composable
-fun InteractToEdit(
-    content: String, onSave: (String) -> Unit, pre: String, modifier: Modifier = Modifier,
-    w1: Float = 0.75f, w2: Float = 0.25f,
-    singleLine: Boolean = true
-) {
-    var text by remember(content) { mutableStateOf(content) }
-
-    Row(modifier.padding(5.dp)) {
-        val base = if(singleLine) Modifier.align(Alignment.CenterVertically) else Modifier
-        OutlinedTextField(
-            text, { text = it }, base.weight(w1), label = { Text(pre) },
-            singleLine = singleLine, minLines = if(singleLine) 1 else 5
-        )
-        IconButton({ onSave(text) }, base.weight(w2)) { Icon(Icons.Default.Check, "Save") }
-    }
-}
-
-@Composable
-fun PaneHeader(name: String, type: String, course: Course, edition: Edition) = Column {
-    Text(name, style = MaterialTheme.typography.headlineMedium)
-    Text("${type.capitalize(Locale.current)} in ${course.name} (${edition.name})", fontStyle = FontStyle.Italic)
-}
-
-@Composable
-fun PaneHeader(name: String, type: String, courseEdition: Pair<Course, Edition>) = PaneHeader(name, type, courseEdition.first, courseEdition.second)
-
-@OptIn(ExperimentalFoundationApi::class)
-@Composable
-fun AutocompleteLineField__(
-//    state: RichTextState,
-    value: TextFieldValue, onValueChange: (TextFieldValue) -> Unit,
-    modifier: Modifier = Modifier, label: @Composable (() -> Unit)? = null,
-    onFilter: (String) -> List<String>
-) = Column(modifier) {
-    var suggestions by remember { mutableStateOf(listOf<String>()) }
-    var selected by remember { mutableStateOf(0) }
-    val scope = rememberCoroutineScope()
-    val scrollState = rememberLazyListState()
-
-    val posToLine = { pos: Int ->
-        (value.text.take(pos).count { it == '\n' }) to (value.text.take(pos).lastIndexOf('\n'))
-    }
-
-    val autoComplete = { str: String ->
-        val pos = value.selection.start
-        val lines = value.text.split("\n").toMutableList()
-        val (lineno, lineStart) = posToLine(pos)
-
-        lines[lineno] = str
-        onValueChange(value.copy(text = lines.joinToString("\n"), selection = TextRange(lineStart + str.length + 1)))
-    }
-
-    val currentLine = {
-        value.text.split('\n')[posToLine(value.selection.start).first]
-    }
-
-    val gotoOption = { idx: Int ->
-        selected = if(suggestions.isEmpty()) 0 else ((idx + suggestions.size) % suggestions.size)
-        scope.launch {
-            scrollState.animateScrollToItem(if(suggestions.isNotEmpty()) (selected + 1) else 0)
-        }
-        Unit
-    }
-
-    val onKey = { kev: KeyEvent ->
-        var res = true
-        if(suggestions.isNotEmpty()) {
-            when (kev.key) {
-                Key.Tab -> autoComplete(suggestions[selected])
-                Key.DirectionUp -> gotoOption(selected - 1)
-                Key.DirectionDown -> gotoOption(selected + 1)
-                Key.Escape -> suggestions = listOf()
-                else -> res = false
-            }
-        }
-        else res = false
-
-        res
-    }
-
-    LaunchedEffect(value.text) {
-        delay(300)
-        suggestions = onFilter(currentLine())
-        gotoOption(if(suggestions.isEmpty()) 0 else selected % suggestions.size)
-    }
-
-    OutlinedTextField(
-        value, onValueChange,
-        Modifier.fillMaxWidth().weight(0.75f).onKeyEvent(onKey), label = label, singleLine = false, minLines = 5
-    )
-
-    if(suggestions.isNotEmpty()) {
-        LazyColumn(Modifier.weight(0.25f), state = scrollState) {
-            stickyHeader {
-                Surface(tonalElevation = 5.dp) {
-                    Text("Suggestions", Modifier.padding(5.dp).fillMaxWidth(), fontStyle = FontStyle.Italic)
-                }
-            }
-            itemsIndexed(suggestions) { idx, it ->
-                Surface(Modifier.padding(5.dp).fillMaxWidth(), tonalElevation = if(selected == idx) 50.dp else 0.dp) {
-                    Text(it, Modifier.clickable { autoComplete(it) })
-                }
-            }
-        }
-    }
-}
-
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-fun DateTimePicker(
-    value: LocalDateTime,
-    onPick: (LocalDateTime) -> Unit,
-    formatter: (LocalDateTime) -> String = { java.text.DateFormat.getDateTimeInstance().format(Date.from(it.toInstant(TimeZone.currentSystemDefault()).toJavaInstant())) },
-    modifier: Modifier = Modifier,
-) {
-    var showPicker by remember { mutableStateOf(false) }
-
-    Row(modifier) {
-        Text(
-            formatter(value),
-            Modifier.align(Alignment.CenterVertically)
-        )
-        Spacer(Modifier.width(10.dp))
-        Button({ showPicker = true }) { Text("Change") }
-
-        if (showPicker) {
-            val dateState = rememberDatePickerState(value.toInstant(TimeZone.currentSystemDefault()).toEpochMilliseconds())
-            val timeState = rememberTimePickerState(value.hour, value.minute)
-
-            Dialog(
-                { showPicker = false },
-                properties = DialogProperties(usePlatformDefaultWidth = false)
-            ) {
-                Surface(
-                    shape = MaterialTheme.shapes.extraLarge, tonalElevation = 6.dp,
-                    modifier = Modifier.width(800.dp).height(600.dp)
-                ) {
-                    val colors = TimePickerDefaults.colors(
-                                    selectorColor = MaterialTheme.colorScheme.primary,
-                                    timeSelectorSelectedContainerColor = MaterialTheme.colorScheme.primary,
-                                    timeSelectorSelectedContentColor = MaterialTheme.colorScheme.onPrimary,
-                                    clockDialSelectedContentColor = MaterialTheme.colorScheme.onPrimary,
-                    ) // the colors are fucked, and I don't get why :(
-
-                    Column(Modifier.padding(10.dp)) {
-                        Row {
-                            DatePicker(
-                                dateState,
-                                Modifier.padding(10.dp).weight(0.5f),
-                            )
-                            TimePicker(
-                                timeState,
-                                Modifier.weight(0.5f).align(Alignment.CenterVertically),
-                                layoutType = TimePickerLayoutType.Vertical,
-                                colors = colors
-                            )
-                        }
-                        CancelSaveRow(true, { showPicker = false }) {
-                            val date = (dateState.selectedDateMillis?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(TimeZone.currentSystemDefault()) } ?: value).date
-                            val time = LocalTime(timeState.hour, timeState.minute)
-
-                            onPick(LocalDateTime(date, time))
-                            showPicker = false
-                        }
-                    }
-                }
-            }
-        }
-
-
-//            DatePickerDialog(
-//            { showPicker = false },
-//            {
-//                Button({
-//                    showPicker = false; dateState.selectedDateMillis?.let { state.updateDeadline(it) }
-//                }) { Text("Set deadline") }
-//            },
-//            Modifier,
-//            { Button({ showPicker = false }) { Text("Cancel") } },
-//            shape = MaterialTheme.shapes.medium,
-//            tonalElevation = 10.dp,
-//            colors = DatePickerDefaults.colors(),
-//            properties = DialogProperties()
-//        ) {
-//            DatePicker(
-//                dateState,
-//                Modifier.fillMaxWidth().padding(10.dp),
-//            )
-//        }
-    }
-}
-
-@Composable
-fun ItalicAndNormal(italic: String, normal: String) = Row{
-    Text(italic, fontStyle = FontStyle.Italic)
-    Text(normal)
-}
-
-@Composable
-fun Selectable(
-    isSelected: Boolean,
-    onSelect: () -> Unit, onDeselect: () -> Unit,
-    unselectedElevation: Dp = 0.dp, selectedElevation: Dp = 50.dp,
-    content: @Composable () -> Unit
-) {
-    Surface(
-        Modifier.fillMaxWidth().clickable { if(isSelected) onDeselect() else onSelect() },
-        tonalElevation = if (isSelected) selectedElevation else unselectedElevation,
-        shape = MaterialTheme.shapes.medium
-    ) {
-        content()
-    }
-}
-
-@Composable
-fun SelectEditDeleteRow(
-    isSelected: Boolean,
-    onSelect: () -> Unit, onDeselect: () -> Unit, onEdit: () -> Unit, onDelete: () -> Unit,
-    content: @Composable BoxScope.() -> Unit
-)  = Selectable(isSelected, onSelect, onDeselect) {
-    Row {
-        Box(Modifier.weight(1f).align(Alignment.CenterVertically)) { content() }
-        IconButton(onEdit, Modifier.align(Alignment.CenterVertically)) {
-            Icon(Icons.Default.Edit, "Edit")
-        }
-        IconButton(onDelete, Modifier.align(Alignment.CenterVertically)) {
-            Icon(Icons.Default.Delete, "Delete")
         }
     }
 }
@@ -438,19 +136,19 @@ fun FromTo(size: Dp) {
     }
 }
 
-@Composable
-fun PEGradeWidget(
-    grade: PeerEvaluationState.Student2StudentEntry?,
-    onSelect: () -> Unit, onDeselect: () -> Unit,
-    isSelected: Boolean,
-    modifier: Modifier = Modifier
-) = Box(modifier.padding(2.dp)) {
-    Selectable(isSelected, onSelect, onDeselect) {
-        Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
-            Text(grade?.let { if(it.grade.isNotBlank()) it.grade else if(it.feedback.isNotBlank()) "(other)" else null } ?: "none")
-        }
-    }
-}
+//@Composable
+//fun PEGradeWidget(
+//    grade: PeerEvaluationState.Student2StudentEntry?,
+//    onSelect: () -> Unit, onDeselect: () -> Unit,
+//    isSelected: Boolean,
+//    modifier: Modifier = Modifier
+//) = Box(modifier.padding(2.dp)) {
+//    Selectable(isSelected, onSelect, onDeselect) {
+//        Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+//            Text(grade?.let { if(it.grade.isNotBlank()) it.grade else if(it.feedback.isNotBlank()) "(other)" else null } ?: "none")
+//        }
+//    }
+//}
 
 @Composable
 fun VLine(width: Dp = 1.dp, color: Color = Color.Black) = Spacer(Modifier.fillMaxHeight().width(width).background(color))
@@ -459,4 +157,103 @@ fun VLine(width: Dp = 1.dp, color: Color = Color.Black) = Spacer(Modifier.fillMa
 fun MeasuredLazyItemScope.HLine(height: Dp = 1.dp, color: Color = Color.Black) {
     val width by measuredWidth()
     Spacer(Modifier.width(width).height(height).background(color))
+}
+
+@Composable
+fun RolePicker(used: List<String>, curr: String?, onClose: () -> Unit, onSave: (String?) -> Unit) = DialogWindow(
+    onCloseRequest = onClose,
+    state = rememberDialogState(size = DpSize(400.dp, 500.dp), position = WindowPosition(Alignment.Center))
+) {
+    Surface(Modifier.fillMaxSize().padding(10.dp)) {
+        Box(Modifier.fillMaxSize()) {
+            var role by remember { mutableStateOf(curr ?: "") }
+            Column {
+                Text("Used roles:")
+                LazyColumn(Modifier.weight(1.0f).padding(5.dp)) {
+                    items(used) {
+                        Surface(Modifier.fillMaxWidth().clickable { role = it }, tonalElevation = 5.dp) {
+                            Text(it, Modifier.padding(5.dp))
+                        }
+                        Spacer(Modifier.height(5.dp))
+                    }
+                }
+                OutlinedTextField(role, { role = it }, Modifier.fillMaxWidth())
+                CancelSaveRow(true, onClose) {
+                    onSave(role.ifBlank { null })
+                    onClose()
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun GradePicker(grade: Grade, modifier: Modifier = Modifier, key: Any = Unit, onUpdate: (Grade) -> Unit) = Row(modifier) { // TODO: fix UI to remove save-buttons (instead wait fo end of editing)
+    Text("Grade: ", Modifier.align(Alignment.CenterVertically))
+
+    when(grade) {
+        is Grade.Categoric -> {
+            if(grade.options.size <= 5) {
+                Column {
+                    SingleChoiceSegmentedButtonRow(Modifier.fillMaxWidth()) {
+                        grade.options.forEachIndexed { idx, opt ->
+                            println("Rendering opt ${opt.option} (index $idx) ~ current value: ${grade.value.option})")
+                            SegmentedButton(
+                                grade.value.option == opt.option, { onUpdate(Grade.Categoric(opt, grade.options, grade.grade)) },
+                                shape = SegmentedButtonDefaults.itemShape(idx, grade.options.size)
+                            ) { Text(opt.option.maxN(15)) }
+                        }
+                    }
+                    Row {
+                        Spacer(Modifier.weight(1f))
+                        Text(grade.value.option, fontStyle = FontStyle.Italic, style = MaterialTheme.typography.bodySmall)
+                    }
+                }
+            }
+            else {
+                var slider by remember(grade, key) { mutableStateOf(maxOf(0, grade.options.indexOfFirst { it.option == grade.value.option }))  }
+                Row {
+                    Column(Modifier.weight(1f)) {
+                        Slider(
+                            slider.toFloat(),
+                            onValueChange = { onUpdate(grade.copy(value = grade.options[slider])) },
+                            steps = grade.options.size,
+                            valueRange = 0f..(grade.options.size - 1).toFloat()
+                        )
+                        Row {
+                            Spacer(Modifier.weight(1f))
+                            Text(grade.options[slider].option, fontStyle = FontStyle.Italic, style = MaterialTheme.typography.bodySmall)
+                        }
+                    }
+                }
+            }
+        }
+        is Grade.FreeText -> {
+            var text by remember(grade, key) { mutableStateOf(grade.text) }
+
+            OutlinedTextField(grade.text, { onUpdate(grade.copy(text = it)) }, Modifier.weight(1f), singleLine = true)
+            Button({ onUpdate(Grade.FreeText(text)) }, enabled = text != grade.text) {
+                Text("Save")
+            }
+        }
+        is Grade.Numeric -> {
+            var num by remember(grade, key) { mutableStateOf(grade.value.toString()) }
+
+            OutlinedTextField(
+                num, { num = it.filter { c -> c.isDigit() || c == '.' || c == ',' }.ifEmpty { "0" } },
+                Modifier.weight(1f), singleLine = true, isError = (num.toDoubleOrNull() ?: 0.0) > grade.grade.max
+            )
+            Button({ onUpdate(Grade.Numeric(num.toDoubleOrNull() ?: 0.0, grade.grade)) }, enabled = (num.toDoubleOrNull() ?: 0.0) <= grade.grade.max) {
+                Text("Save")
+            }
+        }
+        is Grade.Percentage -> {
+            var perc by remember(grade, key) { mutableStateOf(grade.percentage.toString()) }
+
+            OutlinedTextField("$perc%", { perc = it.filter { c -> c.isDigit() || c == '.' || c == ',' }.ifEmpty { "0" } }, Modifier.weight(1f), singleLine = true)
+            Button({ onUpdate(Grade.Percentage(perc.toDoubleOrNull() ?: 0.0)) }) {
+                Text("Save")
+            }
+        }
+    }
 }

composeApp/src/desktopMain/kotlin/com/jaytux/grader/viewmodel/DbState.kt

@@ -3,821 +3,64 @@ package com.jaytux.grader.viewmodel
 import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.State
 import androidx.compose.runtime.mutableStateOf
-import com.jaytux.grader.data.*
-import com.jaytux.grader.data.EditionStudents.editionId
-import com.jaytux.grader.data.EditionStudents.studentId
-import com.jaytux.grader.viewmodel.GroupAssignmentState.*
-import kotlinx.datetime.*
-import kotlinx.datetime.TimeZone
-import org.jetbrains.exposed.dao.id.EntityID
-import org.jetbrains.exposed.sql.*
-import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
-import org.jetbrains.exposed.sql.transactions.transaction
-import java.util.*
-import kotlin.math.max
+import org.jetbrains.exposed.v1.core.Transaction
+import org.jetbrains.exposed.v1.jdbc.transactions.transaction
 
 fun <T> MutableState<T>.immutable(): State<T> = this
-fun <T> SizedIterable<T>.sortAsc(vararg columns: Expression<*>) = this.orderBy(*(columns.map { it to SortOrder.ASC }.toTypedArray()))
-
-enum class AssignmentType(val show: String) { Solo("Solo Assignment"), Group("Group Assignment"), Peer("Peer Evaluation") }
-sealed class Assignment {
-    class GAssignment(val assignment: GroupAssignment) : Assignment() {
-        override fun name(): String = assignment.name
-        override fun id(): EntityID<UUID> = assignment.id
-        override fun index(): Int? = assignment.number
-    }
-    class SAssignment(val assignment: SoloAssignment) : Assignment() {
-        override fun name(): String = assignment.name
-        override fun id(): EntityID<UUID> = assignment.id
-        override fun index(): Int? = assignment.number
-    }
-    class PeerEval(val evaluation: com.jaytux.grader.data.PeerEvaluation) : Assignment() {
-        override fun name(): String = evaluation.name
-        override fun id(): EntityID<UUID> = evaluation.id
-        override fun index(): Int? = evaluation.number
-    }
-
-    abstract fun name(): String
-    abstract fun id(): EntityID<UUID>
-    abstract fun index(): Int?
-
-    companion object {
-        fun from(assignment: GroupAssignment) = GAssignment(assignment)
-        fun from(assignment: SoloAssignment) = SAssignment(assignment)
-        fun from(pEval: PeerEvaluation) = PeerEval(pEval)
-
-        fun merge(groups: List<GroupAssignment>, solos: List<SoloAssignment>, peers: List<PeerEvaluation>): List<Assignment> {
-            val g = groups.map { from(it) }
-            val s = solos.map { from(it) }
-            val p = peers.map { from(it) }
-            return (g + s + p).sortedWith(compareBy<Assignment> { it.index() }.thenBy { it.name() })
-        }
-    }
-}
 
 class RawDbState<T: Any>(private val loader: (Transaction.() -> List<T>)) {
-
     private val rawEntities by lazy {
         mutableStateOf(transaction { loader() })
     }
-    val entities = rawEntities.immutable()
 
+    val entities = rawEntities.immutable()
     fun refresh() {
         rawEntities.value = transaction { loader() }
     }
 }
 
-class CourseListState {
-    val courses = RawDbState { Course.all().sortAsc(Courses.name).toList() }
-
-    fun new(name: String) {
-        transaction { Course.new { this.name = name } }
-        courses.refresh()
+class RawDbFocusableSingleState<TIn, TOut: Any>(private val loader: (Transaction.(TIn) -> TOut?)) {
+    private var _input: TIn? = null
+    private val rawEntity by lazy {
+        mutableStateOf<TOut?>(null)
     }
 
-    fun delete(course: Course) {
-        transaction { course.delete() }
-        courses.refresh()
+    val entity: State<TOut?> = rawEntity.immutable()
+
+    fun focus(input: TIn) {
+        _input = input
+        rawEntity.value = transaction { loader(input) }
     }
 
-    fun getEditions(course: Course) = EditionListState(course)
-}
-
-class EditionListState(val course: Course) {
-    val editions = RawDbState { Edition.find { Editions.courseId eq course.id }.sortAsc(Editions.name).toList() }
-
-    fun new(name: String) {
-        transaction { Edition.new { this.name = name; this.course = this@EditionListState.course } }
-        editions.refresh()
+    fun unfocus() {
+        _input = null
+        rawEntity.value = null
     }
 
-    fun delete(edition: Edition) {
-        transaction { edition.delete() }
-        editions.refresh()
+    fun refresh() {
+        rawEntity.value = transaction { _input?.let { loader(it) } }
     }
 }
 
-enum class OpenPanel(val tabName: String) {
-    Student("Students"), Group("Groups"), Assignment("Assignments")
-}
-
-class EditionState(val edition: Edition) {
-    val course = transaction { edition.course }
-    val students = RawDbState { edition.soloStudents.sortAsc(Students.name).toList() }
-    val groups = RawDbState { edition.groups.sortAsc(Groups.name).toList() }
-    val solo = RawDbState { edition.soloAssignments.sortAsc(SoloAssignments.name).toList() }
-    val groupAs = RawDbState { edition.groupAssignments.sortAsc(GroupAssignments.name).toList() }
-    val peer = RawDbState { edition.peerEvaluations.sortAsc(PeerEvaluations.name).toList() }
-    private val _history = mutableStateOf(listOf(-1 to OpenPanel.Assignment))
-    val history = _history.immutable()
-
-    val availableStudents = RawDbState {
-        Student.find {
-            (Students.id notInList edition.soloStudents.map { it.id })
-        }.toList()
+class RawDbFocusableState<TIn, TOut: Any>(private val loader: (Transaction.(TIn) -> List<TOut>)) {
+    private var _input: TIn? = null
+    private val rawEntities by lazy {
+        mutableStateOf<List<TOut>?>(null)
     }
 
-    fun newStudent(name: String, contact: String, note: String, addToEdition: Boolean) {
-        transaction {
-            val student = Student.new { this.name = name; this.contact = contact; this.note = note }
-            if(addToEdition) EditionStudents.insert {
-                it[editionId] = edition.id
-                it[studentId] = student.id
-            }
-        }
+    val entities: State<List<TOut>?> = rawEntities.immutable()
 
-        if(addToEdition) students.refresh()
-        else availableStudents.refresh()
-    }
-    fun setStudentName(student: Student, name: String) {
-        transaction {
-            student.name = name
-        }
-        students.refresh()
-    }
-    fun addToCourse(students: List<Student>) {
-        transaction {
-            EditionStudents.batchInsert(students) {
-                this[editionId] = edition.id
-                this[studentId] = it.id
-            }
-        }
-        availableStudents.refresh()
-        this.students.refresh()
+    fun focus(input: TIn) {
+        _input = input
+        rawEntities.value = transaction { loader(input) }
     }
 
-    fun newGroup(name: String) {
-        transaction {
-            Group.new { this.name = name; this.edition = this@EditionState.edition }
-            groups.refresh()
-        }
-    }
-    fun setGroupName(group: Group, name: String) {
-        transaction {
-            group.name = name
-        }
-        groups.refresh()
+    fun unfocus() {
+        _input = null
+        rawEntities.value = null
     }
 
-    private fun now(): LocalDateTime {
-        val instant = Instant.fromEpochMilliseconds(System.currentTimeMillis())
-        return instant.toLocalDateTime(TimeZone.currentSystemDefault())
+    fun refresh() {
+        rawEntities.value = transaction { _input?.let { loader(it) } }
     }
-
-    private fun nextIdx(): Int = max(
-        solo.entities.value.maxOfOrNull { it.number ?: 0 } ?: 0,
-        groupAs.entities.value.maxOfOrNull { it.number ?: 0 } ?: 0
-    ) + 1
-
-    fun newSoloAssignment(name: String) {
-        transaction {
-            val assign = SoloAssignment.new {
-                this.name = name; this.edition = this@EditionState.edition; assignment = ""; deadline = now()
-                this.number = nextIdx()
-            }
-            val global = SoloAssignmentCriterion.new {
-                this.name = "_global"; this.description = "[Global] Meta-criterion for $name"; this.assignment = assign
-            }
-            assign.globalCriterion = global
-            solo.refresh()
-        }
-    }
-    fun setSoloAssignmentTitle(assignment: SoloAssignment, title: String) {
-        transaction {
-            assignment.name = title
-        }
-        solo.refresh()
-    }
-    fun newGroupAssignment(name: String) {
-        transaction {
-            val assign = GroupAssignment.new {
-                this.name = name; this.edition = this@EditionState.edition; assignment = ""; deadline = now()
-                this.number = nextIdx()
-            }
-            val global = GroupAssignmentCriterion.new {
-                this.name = "_global"; this.description = "[Global] Meta-criterion for $name"; this.assignment = assign
-            }
-            assign.globalCriterion = global
-            groupAs.refresh()
-        }
-    }
-    fun setGroupAssignmentTitle(assignment: GroupAssignment, title: String) {
-        transaction {
-            assignment.name = title
-        }
-        groupAs.refresh()
-    }
-    fun newPeerEvaluation(name: String) {
-        transaction {
-            PeerEvaluation.new {
-                this.name = name; this.edition = this@EditionState.edition
-                this.number = nextIdx()
-            }
-            peer.refresh()
-        }
-    }
-    fun setPeerEvaluationTitle(assignment: PeerEvaluation, title: String) {
-        transaction {
-            assignment.name = title
-        }
-        peer.refresh()
-    }
-
-    fun newAssignment(type: AssignmentType, name: String) = when(type) {
-        AssignmentType.Solo -> newSoloAssignment(name)
-        AssignmentType.Group -> newGroupAssignment(name)
-        AssignmentType.Peer -> newPeerEvaluation(name)
-    }
-    fun setAssignmentTitle(assignment: Assignment, title: String) = when(assignment) {
-        is Assignment.GAssignment -> setGroupAssignmentTitle(assignment.assignment, title)
-        is Assignment.SAssignment -> setSoloAssignmentTitle(assignment.assignment, title)
-        is Assignment.PeerEval -> setPeerEvaluationTitle(assignment.evaluation, title)
-    }
-
-    fun swapOrder(a1: Assignment, a2: Assignment) {
-        transaction {
-            when(a1) {
-                is Assignment.GAssignment -> {
-                    when(a2) {
-                        is Assignment.GAssignment -> {
-                            val temp = a1.assignment.number
-                            a1.assignment.number = a2.assignment.number
-                            a2.assignment.number = temp
-                        }
-                        is Assignment.SAssignment -> {
-                            val temp = a1.assignment.number
-                            a1.assignment.number = nextIdx()
-                            a2.assignment.number = temp
-                        }
-                        is Assignment.PeerEval -> {
-                            val temp = a1.assignment.number
-                            a1.assignment.number = nextIdx()
-                            a2.evaluation.number = temp
-                        }
-                    }
-                }
-                is Assignment.SAssignment -> {
-                    when(a2) {
-                        is Assignment.GAssignment -> {
-                            val temp = a1.assignment.number
-                            a1.assignment.number = a2.assignment.number
-                            a2.assignment.number = temp
-                        }
-                        is Assignment.SAssignment -> {
-                            val temp = a1.assignment.number
-                            a1.assignment.number = a2.assignment.number
-                            a2.assignment.number = temp
-                        }
-                        is Assignment.PeerEval -> {
-                            val temp = a1.assignment.number
-                            a1.assignment.number = nextIdx()
-                            a2.evaluation.number = temp
-                        }
-                    }
-                }
-                is Assignment.PeerEval -> {
-                    when(a2) {
-                        is Assignment.GAssignment -> {
-                            val temp = a1.evaluation.number
-                            a1.evaluation.number = a2.assignment.number
-                            a2.assignment.number = temp
-                        }
-                        is Assignment.SAssignment -> {
-                            val temp = a1.evaluation.number
-                            a1.evaluation.number = a2.assignment.number
-                            a2.assignment.number = temp
-                        }
-                        is Assignment.PeerEval -> {
-                            val temp = a1.evaluation.number
-                            a1.evaluation.number = a2.evaluation.number
-                            a2.evaluation.number = temp
-                        }
-                    }
-                }
-            }
-        }
-        solo.refresh(); groupAs.refresh()
-    }
-
-    fun delete(s: Student) {
-        transaction {
-            EditionStudents.deleteWhere { studentId eq s.id }
-            GroupStudents.deleteWhere { studentId eq s.id }
-            IndividualFeedbacks.deleteWhere { studentId eq s.id }
-        }
-        students.refresh(); availableStudents.refresh()
-    }
-    fun delete(g: Group) {
-        transaction {
-            GroupFeedbacks.deleteWhere { groupId eq g.id }
-            IndividualFeedbacks.deleteWhere { groupId eq g.id }
-            GroupStudents.deleteWhere { groupId eq g.id }
-            g.delete()
-        }
-        groups.refresh(); groupAs.refresh()
-    }
-    fun delete(sa: SoloAssignment) {
-        transaction {
-            SoloAssignmentCriteria.selectAll().where { SoloAssignmentCriteria.assignmentId eq sa.id }.forEach { it ->
-                val id = it[SoloAssignmentCriteria.assignmentId]
-                SoloFeedbacks.deleteWhere { criterionId eq id }
-            }
-            SoloAssignmentCriteria.deleteWhere { assignmentId eq sa.id }
-            sa.delete()
-        }
-        solo.refresh()
-    }
-    fun delete(ga: GroupAssignment) {
-        transaction {
-            GroupAssignmentCriteria.selectAll().where { GroupAssignmentCriteria.assignmentId eq ga.id }.forEach { it ->
-                val id = it[GroupAssignmentCriteria.assignmentId]
-                GroupFeedbacks.deleteWhere { criterionId eq id }
-                IndividualFeedbacks.deleteWhere { criterionId eq id }
-            }
-            GroupAssignmentCriteria.deleteWhere { assignmentId eq ga.id }
-            ga.delete()
-        }
-        groupAs.refresh()
-    }
-    fun delete(pe: PeerEvaluation) {
-        transaction {
-            PeerEvaluationContents.deleteWhere { peerEvaluationId eq pe.id }
-            StudentToStudentEvaluation.deleteWhere { peerEvaluationId eq pe.id }
-            pe.delete()
-        }
-        peer.refresh()
-    }
-    fun delete(assignment: Assignment) = when(assignment) {
-        is Assignment.GAssignment -> delete(assignment.assignment)
-        is Assignment.SAssignment -> delete(assignment.assignment)
-        is Assignment.PeerEval -> delete(assignment.evaluation)
-    }
-
-    fun navTo(panel: OpenPanel, id: Int = -1) {
-        _history.value += (id to panel)
-    }
-    fun navTo(id: Int) = navTo(_history.value.last().second, id)
-    fun back() {
-        var temp = _history.value.dropLast(1)
-        while(temp.last().first == -1 && temp.size >= 2) temp = temp.dropLast(1)
-        _history.value = temp
-    }
-    fun clearHistoryIndex() {
-        val last = _history.value.lastOrNull() ?: return
-        _history.value = _history.value.filter { (i, panel) -> panel != last.second || i != last.first } + (-1 to last.second)
-    }
-}
-
-class StudentState(val student: Student, edition: Edition) {
-    data class LocalGroupGrade(val groupName: String, val assignmentName: String, val groupGrade: String?, val indivGrade: String?)
-    data class LocalSoloGrade(val assignmentName: String, val grade: String)
-
-    val editionCourse = transaction { edition.course to edition }
-    val groups = RawDbState { student.groups.sortAsc(Groups.name).map { it to (it.edition.course.name to it.edition.name) }.toList() }
-    val courseEditions = RawDbState { student.courses.map{ it to it.course }.sortedWith {
-        (e1, c1), (e2, c2) -> c1.name.compareTo(c2.name).let { if(it == 0) e1.name.compareTo(e2.name) else it }
-    }.toList() }
-
-    val groupGrades = RawDbState {
-        val groupsForEdition = Group.find {
-            (Groups.editionId eq edition.id) and (Groups.id inList student.groups.map { it.id })
-        }.associate { it.id to it.name }
-
-        val asGroup = (GroupAssignments innerJoin GroupAssignmentCriteria innerJoin GroupFeedbacks innerJoin Groups).selectAll().where {
-            (GroupFeedbacks.groupId inList groupsForEdition.keys.toList()) and
-                    (GroupAssignmentCriteria.id eq GroupAssignments.globalCriterion)
-        }.map { it[GroupAssignments.id] to it }
-
-        val asIndividual = (GroupAssignments innerJoin GroupAssignmentCriteria innerJoin IndividualFeedbacks innerJoin Groups).selectAll().where {
-            (IndividualFeedbacks.studentId eq student.id) and
-                    (GroupAssignmentCriteria.id eq GroupAssignments.globalCriterion)
-        }.map { it[GroupAssignments.id] to it }
-
-        val res = mutableMapOf<EntityID<UUID>, LocalGroupGrade>()
-        asGroup.forEach {
-            val (gAId, gRow) = it
-
-            res[gAId] = LocalGroupGrade(
-                gRow[Groups.name], gRow[GroupAssignments.name], gRow[GroupFeedbacks.grade], null
-            )
-        }
-
-        asIndividual.forEach {
-            val (gAId, iRow) = it
-
-            val og = res[gAId] ?: LocalGroupGrade(iRow[Groups.name], iRow[GroupAssignments.name], null, null)
-            res[gAId] = og.copy(indivGrade = iRow[IndividualFeedbacks.grade])
-        }
-        
-        res.values.toList()
-    }
-
-    val soloGrades = RawDbState {
-        (SoloAssignments innerJoin SoloAssignmentCriteria innerJoin SoloFeedbacks).selectAll().where {
-            (SoloFeedbacks.studentId eq student.id) and
-                (SoloAssignmentCriteria.name eq "")
-        }.map { LocalSoloGrade(it[SoloAssignments.name], it[SoloFeedbacks.grade]) }.toList()
-    }
-
-    fun update(f: Student.() -> Unit) {
-        transaction {
-            student.f()
-        }
-    }
-}
-
-class GroupState(val group: Group) {
-    val members = RawDbState { group.studentRoles.map{ it.student to it.role }.sortedBy { it.first.name }.toList() }
-    val availableStudents = RawDbState { Student.find {
-        // not yet in the group
-        (Students.id notInList group.students.map { it.id }) and
-        // but in the same course (edition)
-        (Students.id inList group.edition.soloStudents.map { it.id })
-    }.sortAsc(Students.name).toList() }
-    val course = transaction { group.edition.course to group.edition }
-    val roles = RawDbState {
-        GroupStudents.select(GroupStudents.role).where{ GroupStudents.role.isNotNull() }
-            .withDistinct(true).sortAsc(GroupStudents.role).map{ it[GroupStudents.role] ?: "" }.toList()
-    }
-
-    fun addStudent(student: Student) {
-        transaction {
-            GroupStudents.insert {
-                it[groupId] = group.id
-                it[studentId] = student.id
-            }
-        }
-        members.refresh(); availableStudents.refresh()
-    }
-
-    fun removeStudent(student: Student) {
-        transaction {
-            GroupStudents.deleteWhere { groupId eq group.id and (studentId eq student.id) }
-        }
-        members.refresh(); availableStudents.refresh()
-    }
-
-    fun updateRole(student: Student, role: String?) {
-        transaction {
-            GroupStudents.update({ GroupStudents.groupId eq group.id and (GroupStudents.studentId eq student.id) }) {
-                it[this.role] = role
-            }
-            members.refresh()
-            roles.refresh()
-        }
-    }
-}
-
-class GroupAssignmentState(val assignment: GroupAssignment) {
-    data class FeedbackEntry(val feedback: String, val grade: String)
-    data class LocalCriterionFeedback(
-        val criterion: GroupAssignmentCriterion, val entry: FeedbackEntry?
-    )
-    data class LocalFeedback(
-        val global: FeedbackEntry?, val byCriterion: List<LocalCriterionFeedback>
-    )
-    data class LocalGFeedback(
-        val group: Group,
-        val feedback: LocalFeedback,
-        val individuals: List<Pair<Student, Pair<String?, LocalFeedback>>> // Student -> (Role, Feedback)
-    )
-
-    val editionCourse = transaction { assignment.edition.course to assignment.edition }
-    private val _name = mutableStateOf(assignment.name); val name = _name.immutable()
-    private val _task = mutableStateOf(assignment.assignment); val task = _task.immutable()
-    private val _deadline = mutableStateOf(assignment.deadline); val deadline = _deadline.immutable()
-    val criteria = RawDbState {
-        assignment.criteria.orderBy(GroupAssignmentCriteria.name to SortOrder.ASC).filter { it.id != assignment.globalCriterion.id }
-    }
-    val feedback = RawDbState { loadFeedback() }
-
-    val autofill = RawDbState {
-        val forGroups = (GroupFeedbacks innerJoin GroupAssignmentCriteria).selectAll().where { GroupAssignmentCriteria.assignmentId eq assignment.id }.flatMap {
-            it[GroupFeedbacks.feedback].split('\n')
-        }
-
-        val forIndividuals = (IndividualFeedbacks innerJoin GroupAssignmentCriteria).selectAll().where { GroupAssignmentCriteria.assignmentId eq assignment.id }.flatMap {
-            it[IndividualFeedbacks.feedback].split('\n')
-        }
-
-        (forGroups + forIndividuals).distinct().sorted()
-    }
-
-    private fun Transaction.loadFeedback(): List<Pair<Group, LocalGFeedback>> {
-        val allCrit = GroupAssignmentCriterion.find {
-            GroupAssignmentCriteria.assignmentId eq assignment.id
-        }.orderBy(GroupAssignmentCriteria.name to SortOrder.ASC).filter { it.id != assignment.globalCriterion.id }
-
-        return Group.find {
-            (Groups.editionId eq assignment.edition.id)
-        }.sortAsc(Groups.name).map { group ->
-            val forGroup = (GroupFeedbacks innerJoin Groups).selectAll().where {
-                (GroupFeedbacks.assignmentId eq assignment.id) and (Groups.id eq group.id)
-            }.map { row ->
-                val crit = GroupAssignmentCriterion[row[GroupFeedbacks.criterionId]]
-                val fdbk = row[GroupFeedbacks.feedback]
-                val grade = row[GroupFeedbacks.grade]
-
-                crit to FeedbackEntry(fdbk, grade)
-            }
-
-            val global = forGroup.firstOrNull { it.first.id == assignment.globalCriterion.id }?.second
-            val byCrit_ = forGroup
-                .filter{ it.first.id != assignment.globalCriterion.id }
-                .map { LocalCriterionFeedback(it.first, it.second) }
-                .associateBy { it.criterion.id }
-
-            val byCrit = allCrit.map { c ->
-                byCrit_[c.id] ?: LocalCriterionFeedback(c, null)
-            }
-
-            val byGroup = LocalFeedback(global, byCrit)
-
-            val indiv = group.studentRoles.map {
-                val student = it.student
-                val role = it.role
-
-                val forSt = (IndividualFeedbacks innerJoin Groups)
-                    .selectAll().where {
-                        (IndividualFeedbacks.assignmentId eq assignment.id) and
-                                (IndividualFeedbacks.studentId eq student.id) and (Groups.id eq group.id)
-                    }.map { row ->
-                        val stdId = row[IndividualFeedbacks.studentId]
-                        val crit = GroupAssignmentCriterion[row[IndividualFeedbacks.criterionId]]
-                        val fdbk = row[IndividualFeedbacks.feedback]
-                        val grade = row[IndividualFeedbacks.grade]
-
-                        crit to FeedbackEntry(fdbk, grade)
-                    }
-
-                val global = forSt.firstOrNull { it.first.id == assignment.globalCriterion.id }?.second
-                val byCrit_ = forSt
-                    .filter { it.first != assignment.globalCriterion.id }
-                    .map { LocalCriterionFeedback(it.first, it.second) }
-                    .associateBy { it.criterion.id }
-
-                val byCrit = allCrit.map { c ->
-                    byCrit_[c.id] ?: LocalCriterionFeedback(c, null)
-                }
-                val byStudent = LocalFeedback(global, byCrit)
-
-                student to (role to byStudent)
-            }
-
-            group to LocalGFeedback(group, byGroup, indiv)
-        }
-    }
-
-    fun upsertGroupFeedback(group: Group, msg: String, grd: String, criterion: GroupAssignmentCriterion? = null) {
-        transaction {
-            GroupFeedbacks.upsert {
-                it[assignmentId] = assignment.id
-                it[groupId] = group.id
-                it[this.feedback] = msg
-                it[this.grade] = grd
-                it[criterionId] = criterion?.id ?: assignment.globalCriterion.id
-            }
-        }
-        feedback.refresh(); autofill.refresh()
-    }
-
-    fun upsertIndividualFeedback(student: Student, group: Group, msg: String, grd: String, criterion: GroupAssignmentCriterion? = null) {
-        transaction {
-            IndividualFeedbacks.upsert {
-                it[assignmentId] = assignment.id
-                it[groupId] = group.id
-                it[studentId] = student.id
-                it[this.feedback] = msg
-                it[this.grade] = grd
-                it[criterionId] = criterion?.id ?: assignment.globalCriterion.id
-            }
-        }
-        feedback.refresh(); autofill.refresh()
-    }
-
-    fun updateTask(t: String) {
-        transaction {
-            assignment.assignment = t
-        }
-        _task.value = t
-    }
-
-    fun updateDeadline(d: LocalDateTime) {
-        transaction {
-            assignment.deadline = d
-        }
-        _deadline.value = d
-    }
-
-    fun addCriterion(name: String) {
-        transaction {
-            GroupAssignmentCriterion.new {
-                this.name = name;
-                this.description = "";
-                this.assignment = this@GroupAssignmentState.assignment
-            }
-            criteria.refresh()
-        }
-    }
-
-    fun updateCriterion(criterion: GroupAssignmentCriterion, name: String, desc: String) {
-        transaction {
-            criterion.name = name
-            criterion.description = desc
-        }
-        criteria.refresh()
-    }
-
-    fun deleteCriterion(criterion: GroupAssignmentCriterion) {
-        transaction {
-            GroupFeedbacks.deleteWhere { criterionId eq criterion.id }
-            IndividualFeedbacks.deleteWhere { criterionId eq criterion.id }
-            criterion.delete()
-        }
-        criteria.refresh()
-    }
-}
-
-class SoloAssignmentState(val assignment: SoloAssignment) {
-    data class LocalFeedback(val feedback: String, val grade: String)
-    data class FullFeedback(val global: LocalFeedback?, val byCriterion: List<Pair<SoloAssignmentCriterion, LocalFeedback?>>)
-
-    val editionCourse = transaction { assignment.edition.course to assignment.edition }
-    private val _name = mutableStateOf(assignment.name); val name = _name.immutable()
-    private val _task = mutableStateOf(assignment.assignment); val task = _task.immutable()
-    private val _deadline = mutableStateOf(assignment.deadline); val deadline = _deadline.immutable()
-    val criteria = RawDbState {
-        assignment.criteria.orderBy(SoloAssignmentCriteria.name to SortOrder.ASC).filter { it.id != assignment.globalCriterion.id }
-    }
-    val feedback = RawDbState { loadFeedback() }
-
-    val autofill = RawDbState {
-        SoloFeedbacks.selectAll().where { SoloFeedbacks.assignmentId eq assignment.id }.map {
-            it[SoloFeedbacks.feedback].split('\n')
-        }.flatten().distinct().sorted()
-    }
-
-    private fun Transaction.loadFeedback(): List<Pair<Student, FullFeedback>> {3
-        val allCrit = SoloAssignmentCriterion.find {
-            SoloAssignmentCriteria.assignmentId eq assignment.id
-        }.orderBy(SoloAssignmentCriteria.name to SortOrder.ASC).filter { it.id != assignment.globalCriterion.id }
-
-        return editionCourse.second.soloStudents.sortAsc(Students.name).map { student ->
-            val forStudent = (IndividualFeedbacks innerJoin Students).selectAll().where {
-                (IndividualFeedbacks.assignmentId eq assignment.id) and (Students.id eq student.id)
-            }.map { row ->
-                val crit = SoloAssignmentCriterion[row[IndividualFeedbacks.criterionId]]
-                val fdbk = row[IndividualFeedbacks.feedback]
-                val grade = row[IndividualFeedbacks.grade]
-
-                crit to LocalFeedback(fdbk, grade)
-            }
-
-            val global = forStudent.firstOrNull { it.first == assignment.globalCriterion.id }?.second
-            val byCrit_ = forStudent
-                .filter { it.first != assignment.globalCriterion.id }
-                .map { Pair(it.first, it.second) }
-                .associateBy { it.first.id }
-
-            val byCrit = allCrit.map { c ->
-                byCrit_[c.id] ?: Pair(c, null)
-            }
-
-            student to FullFeedback(global, byCrit)
-        }
-    }
-
-    fun upsertFeedback(student: Student, msg: String?, grd: String?, criterion: SoloAssignmentCriterion? = null) {
-        transaction {
-            SoloFeedbacks.upsert {
-                it[assignmentId] = assignment.id
-                it[studentId] = student.id
-                it[this.feedback] = msg ?: ""
-                it[this.grade] = grd ?: ""
-                it[criterionId] = criterion?.id ?: assignment.globalCriterion.id
-            }
-        }
-        feedback.refresh(); autofill.refresh()
-    }
-
-    fun updateTask(t: String) {
-        transaction {
-            assignment.assignment = t
-        }
-        _task.value = t
-    }
-
-    fun updateDeadline(d: LocalDateTime) {
-        transaction {
-            assignment.deadline = d
-        }
-        _deadline.value = d
-    }
-
-    fun addCriterion(name: String) {
-        transaction {
-            SoloAssignmentCriterion.new {
-                this.name = name;
-                this.description = "";
-                this.assignment = this@SoloAssignmentState.assignment
-            }
-            criteria.refresh()
-        }
-    }
-
-    fun updateCriterion(criterion: SoloAssignmentCriterion, name: String, desc: String) {
-        transaction {
-            criterion.name = name
-            criterion.description = desc
-        }
-        criteria.refresh()
-    }
-
-    fun deleteCriterion(criterion: SoloAssignmentCriterion) {
-        transaction {
-            SoloFeedbacks.deleteWhere { criterionId eq criterion.id }
-            criterion.delete()
-        }
-        criteria.refresh()
-    }
-}
-
-class PeerEvaluationState(val evaluation: PeerEvaluation) {
-    data class Student2StudentEntry(val grade: String, val feedback: String)
-    data class StudentEntry(val student: Student, val role: String?, val global: Student2StudentEntry?, val others: List<Pair<Student, Student2StudentEntry?>>)
-    data class GroupEntry(val group: Group, val content: String, val students: List<StudentEntry>)
-    val editionCourse = transaction { evaluation.edition.course to evaluation.edition }
-    private val _name = mutableStateOf(evaluation.name); val name = _name.immutable()
-    val contents = RawDbState { loadContents() }
-
-    private fun Transaction.loadContents(): List<GroupEntry> {
-        return evaluation.edition.groups.map { group ->
-            val globalNotes = PeerEvaluationContents.selectAll()
-                .where {
-                    (PeerEvaluationContents.groupId eq group.id) and
-                            (PeerEvaluationContents.peerEvaluationId eq evaluation.id)
-                }.firstOrNull()?.let {
-                    it[PeerEvaluationContents.content]
-                }
-
-            val students = group.students.map { from ->
-                val role = GroupStudents.selectAll().where { (GroupStudents.studentId eq from.id) and (GroupStudents.groupId eq group.id) }.firstOrNull()?.let {
-                    it[GroupStudents.role]
-                }
-                val s2g = StudentToGroupEvaluation.selectAll().where {
-                    (StudentToGroupEvaluation.peerEvaluationId eq evaluation.id) and
-                            (StudentToGroupEvaluation.studentId eq from.id)
-                }.firstOrNull()?.let {
-                    Student2StudentEntry(it[StudentToGroupEvaluation.grade], it[StudentToGroupEvaluation.note])
-                }
-
-                val others = group.students.map { other ->
-                    val eval = StudentToStudentEvaluation.selectAll().where {
-                        (StudentToStudentEvaluation.peerEvaluationId eq evaluation.id) and
-                                (StudentToStudentEvaluation.studentIdFrom eq from.id) and
-                                (StudentToStudentEvaluation.studentIdTo eq other.id)
-                    }.firstOrNull()?.let {
-                        Student2StudentEntry(it[StudentToStudentEvaluation.grade], it[StudentToStudentEvaluation.note])
-                    }
-
-                    other to eval
-                }
-
-                StudentEntry(from, role, s2g, others)
-            }
-
-            GroupEntry(group, globalNotes ?: "", students)
-        }
-    }
-
-    fun upsertGroupFeedback(group: Group, feedback: String) {
-        transaction {
-            PeerEvaluationContents.upsert {
-                it[peerEvaluationId] = evaluation.id
-                it[groupId] = group.id
-                it[this.content] = feedback
-            }
-        }
-        contents.refresh()
-    }
-
-    fun upsertIndividualFeedback(from: Student, to: Student?, grade: String, feedback: String) {
-        transaction {
-            to?.let {
-                StudentToStudentEvaluation.upsert {
-                    it[peerEvaluationId] = evaluation.id
-                    it[studentIdFrom] = from.id
-                    it[studentIdTo] = to.id
-                    it[this.grade] = grade
-                    it[this.note] = feedback
-                }
-            } ?: StudentToGroupEvaluation.upsert {
-                it[peerEvaluationId] = evaluation.id
-                it[studentId] = from.id
-                it[this.grade] = grade
-                it[this.note] = feedback
-            }
-        }
-        contents.refresh()
-    }
-}
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/viewmodel/EditionVM.kt

@@ -0,0 +1,419 @@
+package com.jaytux.grader.viewmodel
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.mutableStateOf
+import androidx.lifecycle.ViewModel
+import com.jaytux.grader.app
+import com.jaytux.grader.data.v2.*
+import com.jaytux.grader.ui.AssignmentsTabHeader
+import com.jaytux.grader.ui.GroupsTabHeader
+import com.jaytux.grader.ui.StudentsTabHeader
+import kotlinx.datetime.LocalDateTime
+import kotlinx.datetime.TimeZone
+import kotlinx.datetime.toLocalDateTime
+import org.jetbrains.exposed.v1.core.Expression
+import org.jetbrains.exposed.v1.core.SortOrder
+import org.jetbrains.exposed.v1.core.Transaction
+import org.jetbrains.exposed.v1.core.and
+import org.jetbrains.exposed.v1.core.eq
+import org.jetbrains.exposed.v1.dao.with
+import org.jetbrains.exposed.v1.jdbc.insert
+import org.jetbrains.exposed.v1.jdbc.select
+import org.jetbrains.exposed.v1.jdbc.transactions.transaction
+import kotlin.time.Clock
+
+class EditionVM(val edition: Edition, val course: Course) : ViewModel() {
+    data class GroupData(val group: Group, val members: List<Pair<Student, String?>>)
+    data class CriterionData(val criterion: Criterion, val gradeType: UiGradeType) {
+        companion object {
+            context(trns: Transaction)
+            fun from(c: Criterion) = CriterionData(c, when(c.gradeType) {
+                GradeType.CATEGORIC -> UiGradeType.Categoric(c.categoricGrade!!.options.toList(), c.categoricGrade!!)
+                GradeType.NUMERIC -> UiGradeType.Numeric(c.numericGrade!!)
+                GradeType.PERCENTAGE -> UiGradeType.Percentage
+                GradeType.NONE -> UiGradeType.FreeText
+            })
+        }
+    }
+    data class AssignmentData(val assignment: BaseAssignment, val global: CriterionData, val criteria: List<CriterionData>)
+    data class GradeSummary(val assignment: BaseAssignment, val asMember: Group?, val overridden: Boolean, val grade: Grade?)
+    enum class Tab(val renderTab: @Composable () -> Unit, val addText: String) {
+        STUDENTS(::StudentsTabHeader, "Student"),
+        GROUPS(::GroupsTabHeader, "Group"),
+        ASSIGNMENTS(::AssignmentsTabHeader, "Assignment")
+    }
+
+    val studentList = RawDbState { edition.students.sortedBy { it.name }.toList() }
+    val groupList = RawDbState {
+        edition.groups.with(Group::students, GroupStudent::student).sortedBy { it.name }.map {
+            GroupData(it, it.students.map { gs -> gs.student to gs.role }.sortedBy { it.first.name })
+        }
+    }
+    val assignmentList = RawDbState {
+        edition.assignments.sortedBy { it.number }.map {
+            AssignmentData(it, CriterionData.from(it.globalCriterion), it.nonBaseCriteria.map { c ->
+                CriterionData.from(c)
+            })
+        }
+    }
+    val usedRoles = RawDbState {
+        GroupStudents.select(GroupStudents.role).mapNotNull { it[GroupStudents.role] }.distinct()
+    }
+
+    val categoricGrades = RawDbState {
+        CategoricGrade.all().map {
+            UiGradeType.Categoric(it.options.toList(), it)
+        }
+    }
+
+    val numericGrades = RawDbState {
+        NumericGrade.all().map { UiGradeType.Numeric(it) }
+    }
+
+    val studentGrades = RawDbFocusableState { st: Student ->
+        val groupIds = st.groups.map { it.group.id }.toSet()
+
+        edition.assignments.map { asg ->
+            val (grade, memberOf, override) = when(asg.type) {
+                AssignmentType.GROUP -> {
+                    val asGroup = asg.globalCriterion.feedbacks.find { it.asGroupFeedback?.id in groupIds }
+                    val solo = null // asg.globalCriterion.feedbacks.find { it.forStudentsOverrideIfGroup.any { over -> over.student == st } } // TODO
+                    val gr = (solo ?: asGroup)?.let { Grade.fromAssignment(asg.globalCriterion, it) }
+                    gr to asGroup?.asGroupFeedback app (solo != null)
+                }
+                AssignmentType.SOLO -> {
+                    val gr = asg.globalCriterion.feedbacks.find { it.asSoloFeedback == st }
+                        ?.let { Grade.fromAssignment(asg.globalCriterion, it) }
+                    gr to null app false
+                }
+                AssignmentType.PEER_EVALUATION -> {
+                    val asGroup = asg.globalCriterion.feedbacks.find { it.asPeerEvaluationFeedback?.id in groupIds }
+                    val solo = asg.globalCriterion.feedbacks.find { it.forStudentsOverrideIfPeer.any { over -> over.student == st } }
+                    val gr = (solo ?: asGroup)?.let { Grade.fromAssignment(asg.globalCriterion, it) }
+                    gr to asGroup?.asPeerEvaluationFeedback app (solo != null)
+                }
+            }
+
+            GradeSummary(asg, memberOf, override, grade)
+        }
+    }
+    val studentGroups = RawDbFocusableState { st: Student ->
+        st.groups.map { it.group to it.role }
+    }
+
+    val groupAvailableStudents = RawDbFocusableState { grp: Group ->
+        val exclude = grp.students.map { it.student.id }.toSet()
+        edition.students.filterNot { it.id in exclude }
+    }
+    val groupGrades = RawDbFocusableState { g: Group ->
+        edition.assignments.filter{ it.type != AssignmentType.SOLO }.map { asg ->
+            val grade = when(asg.type) {
+                AssignmentType.GROUP -> {
+                    val asGroup = asg.globalCriterion.feedbacks.find { it.asGroupFeedback?.id == g.id }
+                    asGroup?.let { Grade.fromAssignment(asg.globalCriterion, it) }
+                }
+                AssignmentType.PEER_EVALUATION -> {
+                    val asGroup = asg.globalCriterion.feedbacks.find { it.asPeerEvaluationFeedback?.id == g.id }
+                    asGroup?.let { Grade.fromAssignment(asg.globalCriterion, it) }
+                }
+                else -> null
+            }
+
+            asg to grade
+        }
+    }
+
+    private val _selectedTab = mutableStateOf(Tab.STUDENTS)
+    private val _focusIndex = mutableStateOf(-1)
+    val selectedTab = _selectedTab.immutable()
+    val focusIndex = _focusIndex.immutable()
+
+    fun switchTo(tab: Tab) {
+        _selectedTab.value = tab
+        _focusIndex.value = -1
+    }
+
+    fun focus(idx: Int) {
+        _focusIndex.value = idx
+
+        when(_selectedTab.value) {
+            Tab.STUDENTS -> {
+                val st = studentList.entities.value[idx]
+                studentGrades.focus(st)
+                studentGroups.focus(st)
+            }
+            Tab.GROUPS -> {
+                val grp = groupList.entities.value[idx].group
+                groupAvailableStudents.focus(grp)
+                groupGrades.focus(grp)
+            }
+            Tab.ASSIGNMENTS -> {}
+        }
+    }
+
+    fun focus(group: Group) {
+        val idx = groupList.entities.value.indexOfFirst { it.group.id == group.id }
+        if(idx != -1) {
+            switchTo(Tab.GROUPS)
+            focus(idx)
+        }
+    }
+
+    fun focus(student: Student) {
+        val idx = studentList.entities.value.indexOfFirst { it.id == student.id }
+        if(idx != -1) {
+            switchTo(Tab.STUDENTS)
+            focus(idx)
+        }
+    }
+
+    fun unfocus() {
+        _focusIndex.value = -1
+
+        studentGrades.unfocus()
+        studentGroups.unfocus()
+    }
+
+    fun mkStudent(name: String, contact: String, note: String) {
+        transaction {
+            val s = Student.new {
+                this.name = name
+                this.contact = contact
+                this.note = note
+            }
+            EditionStudents.insert {
+                it[EditionStudents.editionId] = edition.id
+                it[EditionStudents.studentId] = s.id
+            }
+        }
+        unfocus()
+        studentList.refresh()
+    }
+
+    fun modStudent(student: Student, name: String?, contact: String?, note: String?) {
+        transaction {
+            student.name = name ?: student.name
+            student.contact = contact ?: student.contact
+            student.note = note ?: student.note
+        }
+        studentList.refresh()
+        studentGroups.refresh()
+        studentGrades.refresh()
+    }
+
+    fun rmStudent(student: Student) {
+        transaction {
+            student.delete()
+        }
+        unfocus()
+        studentList.refresh()
+    }
+
+    fun mkGroup(name: String) {
+        transaction {
+            Group.new {
+                this.name = name
+                this.edition = this@EditionVM.edition
+            }
+        }
+        unfocus()
+        groupList.refresh()
+    }
+
+    fun modGroup(group: Group, name: String?) {
+        transaction {
+            group.name = name ?: group.name
+        }
+        groupList.refresh()
+    }
+
+    fun addStudentToGroup(student: Student, group: Group, role: String?) {
+        transaction {
+            GroupStudent.new {
+                this.student = student
+                this.group = group
+                this.role = role
+            }
+        }
+        groupList.refresh()
+        studentGroups.refresh()
+        groupAvailableStudents.refresh()
+    }
+
+    fun setStudentRole(student: Student, group: Group, role: String?) {
+        transaction {
+            GroupStudent.find { (GroupStudents.studentId eq student.id) and (GroupStudents.groupId eq group.id) }.firstOrNull()?.let {
+                it.role = role
+            }
+        }
+        groupList.refresh()
+        groupAvailableStudents.refresh()
+        usedRoles.refresh()
+    }
+
+    fun rmStudentFromGroup(student: Student, group: Group) {
+        transaction {
+            GroupStudent.find { (GroupStudents.studentId eq student.id) and (GroupStudents.groupId eq group.id) }.firstOrNull()?.delete()
+        }
+        groupList.refresh()
+        groupAvailableStudents.refresh()
+    }
+
+    fun rmGroup(group: Group) {
+        transaction {
+            group.delete()
+        }
+        unfocus()
+        groupList.refresh()
+    }
+
+    private fun Transaction.mkBaseAssignment(name: String, type: AssignmentType): BaseAssignment {
+        val asg = BaseAssignment.new {
+            this.name = name
+            this.assignment = ""
+            this.deadline = Clock.System.now().toLocalDateTime(TimeZone.currentSystemDefault())
+            this.number = assignmentList.entities.value.size
+            this.edition = this@EditionVM.edition
+            this.type = type
+        }
+
+        val crit = Criterion.new {
+            this.assignment = asg
+            this.name = "(Default Criterion)"
+            this.desc = "Default criterion for assignment ${asg.name}"
+            this.gradeType = GradeType.NONE
+        }
+
+        asg.globalCriterion = crit
+        return asg
+    }
+
+    private fun postCreateAsg() {
+        focus(assignmentList.entities.value.size)
+        assignmentList.refresh()
+    }
+
+    fun mkGroupAssignment(name: String) {
+        transaction {
+            val asg = mkBaseAssignment(name, AssignmentType.GROUP)
+            GroupAssignment.new { this.base = asg }
+        }
+        postCreateAsg()
+    }
+
+    fun mkSoloAssignment(name: String) {
+        transaction {
+            val asg = mkBaseAssignment(name, AssignmentType.SOLO)
+            SoloAssignment.new { this.base = asg }
+        }
+        postCreateAsg()
+    }
+
+    fun mkPeerEvaluation(name: String) {
+        transaction {
+            val asg = mkBaseAssignment(name, AssignmentType.PEER_EVALUATION)
+            PeerEvaluation.new { this.base = asg }
+        }
+        postCreateAsg()
+    }
+
+    fun mkAssignment(name: String, type: AssignmentType) {
+        when(type) {
+            AssignmentType.GROUP -> mkGroupAssignment(name)
+            AssignmentType.SOLO -> mkSoloAssignment(name)
+            AssignmentType.PEER_EVALUATION -> mkPeerEvaluation(name)
+        }
+    }
+
+    fun modAssignment(assignment: BaseAssignment, name: String?, deadline: LocalDateTime?) {
+        transaction {
+            assignment.name = name ?: assignment.name
+            assignment.deadline = deadline ?: assignment.deadline
+        }
+        assignmentList.refresh()
+    }
+
+    fun setDesc(assignment: AssignmentData, desc: String) {
+        transaction {
+            assignment.global.criterion.desc = desc
+        }
+        assignmentList.refresh()
+    }
+
+    fun mkCriterion(assignment: BaseAssignment, name: String, desc: String, gradeType: UiGradeType) {
+        transaction {
+            val crit = Criterion.new {
+                this.assignment = assignment
+                this.name = name
+                this.desc = desc
+                this.gradeType = when(gradeType) {
+                    is UiGradeType.Categoric -> GradeType.CATEGORIC
+                    is UiGradeType.Numeric -> GradeType.NUMERIC
+                    UiGradeType.Percentage -> GradeType.PERCENTAGE
+                    UiGradeType.FreeText -> GradeType.NONE
+                }
+            }
+
+            when(gradeType) {
+                is UiGradeType.Categoric -> crit.categoricGrade = gradeType.grade
+                is UiGradeType.Numeric -> crit.numericGrade = gradeType.grade
+                else -> {}
+            }
+        }
+        assignmentList.refresh()
+    }
+
+    fun modCriterion(crit: Criterion, name: String?, desc: String?, gradeType: UiGradeType?) {
+        transaction {
+            crit.name = name ?: crit.name
+            crit.desc = desc ?: crit.desc
+            crit.gradeType = when(gradeType) {
+                null -> crit.gradeType
+                is UiGradeType.Categoric -> GradeType.CATEGORIC
+                is UiGradeType.Numeric -> GradeType.NUMERIC
+                UiGradeType.Percentage -> GradeType.PERCENTAGE
+                UiGradeType.FreeText -> GradeType.NONE
+            }
+
+            when(gradeType) {
+                is UiGradeType.Categoric -> crit.categoricGrade = gradeType.grade
+                is UiGradeType.Numeric -> crit.numericGrade = gradeType.grade
+                else -> {}
+            }
+        }
+        assignmentList.refresh()
+    }
+
+    fun mkScale(name: String, options: List<String>) {
+        transaction {
+            val grade = CategoricGrade.new { this.name = name }
+            options.forEachIndexed { idx, opt ->
+                CategoricGradeOption.new {
+                    this.grade = grade
+                    this.option = opt
+                    this.index = idx
+                }
+            }
+        }
+        categoricGrades.refresh()
+    }
+
+    fun mkNumericScale(name: String, max: Double) {
+        transaction {
+            NumericGrade.new {
+                this.name = name
+                this.max = max
+            }
+        }
+        numericGrades.refresh()
+    }
+
+    fun rmAssignment(assignment: BaseAssignment) {
+        transaction {
+            assignment.delete()
+            (assignment.asPeerEvaluation ?: assignment.asGroupAssignment ?: assignment.asSoloAssignment)?.delete()
+        }
+        unfocus()
+        assignmentList.refresh()
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/viewmodel/Grade.kt

@@ -0,0 +1,57 @@
+package com.jaytux.grader.viewmodel
+
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import com.jaytux.grader.data.v2.BaseFeedback
+import com.jaytux.grader.data.v2.CategoricGrade
+import com.jaytux.grader.data.v2.CategoricGradeOption
+import com.jaytux.grader.data.v2.CategoricGradeOptions
+import com.jaytux.grader.data.v2.Criterion
+import com.jaytux.grader.data.v2.GradeType
+import com.jaytux.grader.data.v2.NumericGrade
+import com.jaytux.grader.maxN
+import org.jetbrains.exposed.v1.core.Transaction
+import org.jetbrains.exposed.v1.jdbc.transactions.transaction
+
+sealed class Grade {
+    data class FreeText(val text: String) : Grade()
+    data class Percentage(val percentage: Double) : Grade()
+    data class Numeric(val value: Double, val grade: NumericGrade) : Grade()
+    data class Categoric(val value: CategoricGradeOption, val options: List<CategoricGradeOption>, val grade: CategoricGrade) : Grade()
+
+    @Composable
+    fun render(modifier: Modifier = Modifier) = when(this) {
+        is FreeText -> Text(text.maxN(15), modifier)
+        is Categoric -> Text(value.option, modifier)
+        is Numeric -> Text("$value / ${grade.max}", modifier)
+        is Percentage -> Text("$percentage%", modifier)
+    }
+
+    companion object {
+        context(trns: Transaction)
+        fun fromAssignment(asg: Criterion, fdb: BaseFeedback): Grade = when(asg.gradeType) {
+            GradeType.CATEGORIC ->
+                Categoric(fdb.gradeCategoric!!, asg.categoricGrade!!.options.toList(), asg.categoricGrade!!)
+
+            GradeType.NUMERIC -> Numeric(fdb.gradeNumeric!!, asg.numericGrade!!)
+            GradeType.PERCENTAGE -> Percentage(fdb.gradeNumeric!!)
+            GradeType.NONE -> FreeText(fdb.gradeFreeText!!)
+        }
+
+        fun defaultFreeText() = FreeText("")
+        fun defaultPercentage() = Percentage(0.0)
+        fun defaultNumeric(grade: NumericGrade) = Numeric(0.0, grade)
+        fun defaultCategoric(grade: CategoricGrade, options: List<CategoricGradeOption>) = Categoric(options.first(), options, grade)
+
+        fun default(type: GradeType, cat: CategoricGrade?, num: NumericGrade?) = when(type) {
+            GradeType.CATEGORIC -> transaction {
+                cat!!
+                defaultCategoric(cat, cat.options.toList())
+            }
+            GradeType.NUMERIC -> defaultNumeric(num!!)
+            GradeType.PERCENTAGE -> defaultPercentage()
+            GradeType.NONE -> defaultFreeText()
+        }
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/viewmodel/GroupsGradingVM.kt

@@ -0,0 +1,174 @@
+package com.jaytux.grader.viewmodel
+
+import androidx.compose.runtime.mutableStateOf
+import androidx.lifecycle.ViewModel
+import com.jaytux.grader.data.v2.BaseAssignment
+import com.jaytux.grader.data.v2.BaseFeedback
+import com.jaytux.grader.data.v2.BaseFeedbacks
+import com.jaytux.grader.data.v2.CategoricGrade
+import com.jaytux.grader.data.v2.Course
+import com.jaytux.grader.data.v2.Criterion
+import com.jaytux.grader.data.v2.Edition
+import com.jaytux.grader.data.v2.GradeType
+import com.jaytux.grader.data.v2.Group
+import com.jaytux.grader.data.v2.GroupAssignment
+import com.jaytux.grader.data.v2.GroupFeedbacks
+import com.jaytux.grader.data.v2.GroupStudent
+import com.jaytux.grader.data.v2.NumericGrade
+import com.jaytux.grader.data.v2.Student
+import com.jaytux.grader.data.v2.StudentOverrideFeedback
+import com.jaytux.grader.data.v2.StudentOverrideFeedbacks
+import org.jetbrains.exposed.v1.core.Transaction
+import org.jetbrains.exposed.v1.core.and
+import org.jetbrains.exposed.v1.core.eq
+import org.jetbrains.exposed.v1.dao.with
+import org.jetbrains.exposed.v1.jdbc.insert
+import org.jetbrains.exposed.v1.jdbc.transactions.transaction
+import org.jetbrains.exposed.v1.jdbc.upsertReturning
+
+class GroupsGradingVM(val course: Course, val edition: Edition, val base: BaseAssignment) : ViewModel() {
+    data class GroupData(val group: Group, val students: List<Pair<Student, String?>>)
+    data class FeedbackItem(val base: BaseFeedback, val grade: Grade, val feedback: String) {
+        companion object {
+            context(trns: Transaction)
+            fun fromDb(f: BaseFeedback): FeedbackItem = when(f.criterion.gradeType) {
+                GradeType.CATEGORIC -> {
+                    val categoric = f.criterion.categoricGrade!!
+                    val options = categoric.options.toList()
+                    Grade.Categoric(f.gradeCategoric ?: options.first(), options, categoric)
+                }
+                GradeType.NUMERIC -> Grade.Numeric(f.gradeNumeric ?: 0.0, f.criterion.numericGrade!!)
+                GradeType.PERCENTAGE -> Grade.Percentage(f.gradeNumeric ?: 0.0)
+                GradeType.NONE -> Grade.FreeText(f.gradeFreeText ?: "")
+            }.let { FeedbackItem(f, it, f.feedback) }
+        }
+    }
+    data class FeedbackData(val groupLevel: FeedbackItem?, val overrides: List<Pair<Student, FeedbackItem?>>)
+    data class CritData(val criterion: Criterion, val cat: CategoricGrade?, val num: NumericGrade?) {
+        companion object {
+            context(trns: Transaction)
+            fun fromDb(c: Criterion) = CritData(c, c.categoricGrade, c.numericGrade)
+        }
+    }
+
+    private val _focus = mutableStateOf(-1)
+    val focus = _focus.immutable()
+
+    val asGroup = transaction { base.asGroupAssignment!! }
+    val global = transaction { CritData.fromDb(base.globalCriterion) }
+    val groupList = RawDbState {
+        edition.groups.with(Group::students, GroupStudent::student).map { group ->
+            GroupData(group, group.students.map { Pair(it.student, it.role) })
+        }
+    }
+
+    val globalGrade = RawDbFocusableSingleState { group: Group ->
+        val g = base.globalCriterion.feedbacks.find { it.asGroupFeedback?.id == group.id }?.let { FeedbackItem.fromDb(it) }
+        val overrides = g?.let { gl -> getOverrides(group, gl.base) } ?: group.students.map { it.student to null }
+        FeedbackData(g, overrides)
+    }
+
+    val gradeList = RawDbFocusableState { group: Group ->
+        base.nonBaseCriteria.map { crit ->
+            val groupLevel = crit.feedbacks.find { it.asGroupFeedback?.id == group.id }?.let { FeedbackItem.fromDb(it) }
+            val overrides = groupLevel?.let { gl -> getOverrides(group, gl.base) } ?: group.students.map { it.student to null }
+
+            CritData.fromDb(crit) to FeedbackData(groupLevel, overrides)
+        }
+    }
+
+    private fun Transaction.getOverrides(group: Group, fd: BaseFeedback): List<Pair<Student, FeedbackItem?>> {
+//        val feedbacks = fd.forStudentsOverrideIfGroup.filter { it.group.id == group.id }.associateBy { it.student.id }
+//
+//        return group.students.map {
+//            it.student to feedbacks[it.student.id]?.let { sof -> FeedbackItem.fromDb(sof.feedback) }
+//        }
+        return listOf() // TODO!!!
+    }
+
+    fun focusGroup(idx: Int) {
+        _focus.value = idx
+        val group = groupList.entities.value[idx].group
+        globalGrade.focus(group)
+        gradeList.focus(group)
+    }
+
+    fun focusPrev() {
+        if (focus.value > 0) {
+            focusGroup(focus.value - 1)
+        }
+    }
+
+    fun focusNext() {
+        if (focus.value < groupList.entities.value.size - 1) {
+            focusGroup(focus.value + 1)
+        }
+    }
+
+    context(trns: Transaction)
+    private fun BaseFeedback.set(grade: Grade, feedback: String) {
+        this.feedback = feedback
+        when(grade) {
+            is Grade.Categoric -> this.gradeCategoric = grade.value
+            is Grade.FreeText -> this.gradeFreeText = grade.text
+            is Grade.Numeric -> this.gradeNumeric = grade.value
+            is Grade.Percentage -> this.gradeNumeric = grade.percentage
+        }
+    }
+
+    fun modGroupFeedback(crit: Criterion, group: Group, grade: Grade, feedback: String) {
+        transaction {
+            val existing = group.feedbacks.find { f -> f.criterion.id == crit.id }
+            if(existing != null) {
+                existing.set(grade, feedback)
+            }
+            else {
+                val fdb = BaseFeedback.new {
+                    criterion = crit
+                    set(grade, feedback)
+                }
+                GroupFeedbacks.insert {
+                    it[GroupFeedbacks.feedbackId] = fdb.id
+                    it[GroupFeedbacks.groupId] = group.id
+                }
+            }
+        }
+        globalGrade.refresh()
+        gradeList.refresh()
+    }
+
+    fun modOverrideFeedback(crit: Criterion, group: Group, student: Student, groupLevel: FeedbackItem, grade: Grade, feedback: String) {
+        transaction {
+            val existing = groupLevel.base.forStudentsOverrideIfGroup.find { it.student.id == student.id }
+            if(existing != null) {
+                existing.feedback.set(grade, feedback)
+            }
+            else {
+                val fdb = BaseFeedback.new {
+                    criterion = crit
+                    set(grade, feedback)
+                }
+                StudentOverrideFeedback.new {
+                    this.group = group
+                    this.student = student
+                    this.feedback = fdb
+                    this.overrides = groupLevel.base
+                }
+            }
+        }
+        globalGrade.refresh()
+        gradeList.refresh()
+    }
+
+    fun rmOverrideFeedback(crit: Criterion, group: Group, student: Student) {
+        transaction {
+            crit.feedbacks.find {
+                it.asGroupFeedback!!.id == group.id // find relevant group-level feedback
+            }?.forStudentsOverrideIfGroup?.find {
+                it.student.id == student.id // find override for the student
+            }?.delete()
+        }
+        globalGrade.refresh()
+        gradeList.refresh()
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/viewmodel/HomeVM.kt

@@ -0,0 +1,70 @@
+package com.jaytux.grader.viewmodel
+
+import androidx.lifecycle.ViewModel
+import com.jaytux.grader.data.v2.BaseAssignment
+import com.jaytux.grader.data.v2.Course
+import com.jaytux.grader.data.v2.Edition
+import com.jaytux.grader.data.v2.Group
+import com.jaytux.grader.data.v2.Student
+import org.jetbrains.exposed.v1.dao.with
+import org.jetbrains.exposed.v1.jdbc.transactions.transaction
+
+class HomeVM : ViewModel() {
+    data class EditionData(val edition: Edition, val students: List<Student>, val groups: List<Group>, val assignments: List<BaseAssignment>)
+    data class CourseData(val course: Course, val editions: List<EditionData>, val archived: List<EditionData>)
+
+    val courses = RawDbState {
+        Course.all().with(Course::editions, Edition::students, Edition::groups, Edition::assignments).map {
+            val mkEditionData = { e: Edition ->
+                EditionData(e, e.students.toList(), e.groups.toList(), e.assignments.toList())
+            }
+
+            CourseData(it, it.editions.filter { e -> !e.archived }.map(mkEditionData), it.editions.filter { e -> e.archived }.map(mkEditionData))
+        }
+    }
+
+    fun mkCourse(name: String) {
+        transaction {
+            Course.new { this.name = name }
+        }
+        courses.refresh()
+    }
+
+    fun rmCourse(course: Course) {
+        transaction {
+            course.delete()
+        }
+        courses.refresh()
+    }
+
+    fun mkEdition(course: Course, name: String) {
+        transaction {
+            Edition.new {
+                this.course = course
+                this.name = name
+            }
+        }
+        courses.refresh()
+    }
+
+    fun rmEdition(edition: Edition) {
+        transaction {
+            edition.delete()
+        }
+        courses.refresh()
+    }
+
+    fun archiveEdition(edition: Edition) {
+        transaction {
+            edition.archived = true
+        }
+        courses.refresh()
+    }
+
+    fun unarchiveEdition(edition: Edition) {
+        transaction {
+            edition.archived = false
+        }
+        courses.refresh()
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/viewmodel/Navigator.kt

@@ -0,0 +1,152 @@
+package com.jaytux.grader.viewmodel
+
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.*
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.ExperimentalComposeUiApi
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.backhandler.BackHandler
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.jaytux.grader.ui.ChevronLeft
+import kotlin.reflect.KClass
+
+class Navigator private constructor(
+    private var _start: IDestination,
+    private val _typeMap: Map<KClass<out IDestination>, RenderData>
+) : ViewModel() {
+    interface IDestination
+
+    private data class Entry<T : IDestination>(val dest: T, val token: NavToken)
+    inner class NavToken {
+        fun navTo(target: IDestination) { this@Navigator.navTo(target) }
+        fun back() { this@Navigator.back() }
+        inline fun <reified T : IDestination> backTo() { this@Navigator.backTo<T>() }
+        fun rewriteHistory(t: IDestination) { this@Navigator.rewriteHistory(t) }
+    }
+    internal data class RenderData(
+        val header: @Composable (IDestination) -> Unit,
+        val renderer: @Composable (IDestination, NavToken) -> Unit
+    )
+
+    private val _stack = mutableStateOf(listOf<Entry<*>>(Entry(_start, NavToken())))
+
+    fun navTo(target: IDestination) {
+        _stack.value += Entry(target, NavToken())
+    }
+
+    fun back() {
+        if(_stack.value.size > 1) _stack.value = _stack.value.dropLast(1)
+    }
+
+    fun <T : IDestination> backTo(cls: KClass<T>) {
+        val idx = _stack.value.indexOfLast { entry -> cls.isInstance(entry.dest) }
+        if(idx != -1 && idx != _stack.value.lastIndex) {
+            _stack.value = _stack.value.take(idx + 1)
+        }
+    }
+
+    fun rewriteHistory(t: IDestination) {
+        _stack.value = listOf(Entry(t, NavToken()))
+        _start = t
+    }
+
+    inline fun <reified T : IDestination> backTo() = backTo(T::class)
+
+    @OptIn(ExperimentalMaterial3Api::class, ExperimentalComposeUiApi::class)
+    @Composable
+    fun DisplayScaffold() {
+        val state = remember { SnackbarHostState() }
+        val stack by _stack
+        val (top, render) = remember(stack) {
+            val top = stack.last()
+            val render = _typeMap[top.dest::class]
+                ?: throw IllegalStateException("No renderer for destination of type ${top.dest::class.simpleName}")
+            top to render
+        }
+        val snackVM = viewModel<SnackVM>()
+        snackVM.Launcher(state)
+
+        BackHandler { back() }
+        Scaffold(
+            topBar = {
+                TopAppBar(
+                    colors = TopAppBarDefaults.topAppBarColors(containerColor = MaterialTheme.colorScheme.primaryContainer),
+                    title = { render.header(top.dest) },
+                    navigationIcon = {
+                        IconButton({ back() }, enabled = top != _start) {
+                            Icon(ChevronLeft, contentDescription = "Back")
+                        }
+                    }
+                )
+            },
+            snackbarHost = {
+                SnackbarHost(state)
+            }
+        ) { insets ->
+            Surface(Modifier.padding(insets), color = MaterialTheme.colorScheme.surface) {
+                render.renderer(top.dest, top.token)
+            }
+        }
+    }
+
+    @DslMarker
+    annotation class NavigatorDslMarker
+
+    @NavigatorDslMarker
+    class Builder internal constructor(
+        private val _onBuild: (IDestination, Map<KClass<out IDestination>, RenderData>) -> Navigator
+    ) {
+        private val _typeMap = mutableMapOf<KClass<out IDestination>, RenderData>()
+        private lateinit var _start: IDestination
+
+        fun <T : IDestination> composable(cls: KClass<T>, title: @Composable (T) -> Unit, renderer: @Composable (T, NavToken) -> Unit) {
+            _typeMap[cls]?.let {
+                throw IllegalArgumentException("Destination of type ${cls.simpleName} is already registered.")
+            } ?: run {
+                _typeMap[cls] = RenderData({
+                    @Suppress("UNCHECKED_CAST")
+                    title(it as T)
+                }) { d, t ->
+                    @Suppress("UNCHECKED_CAST")
+                    renderer(d as T, t)
+                }
+            }
+        }
+
+        inline fun <reified T : IDestination> composable(noinline title: @Composable (T) -> Unit, noinline renderer: @Composable (T, NavToken) -> Unit) {
+            composable(T::class, title, renderer)
+        }
+
+        fun start(start: IDestination) {
+            if(this::_start.isInitialized) throw IllegalStateException("Start destination is already set.")
+            _start = start
+        }
+
+        internal fun build(): Navigator {
+            if(!this::_start.isInitialized) throw IllegalStateException("Start destination is not set.")
+            return _onBuild(_start, _typeMap)
+        }
+    }
+
+    companion object {
+        fun build(block: Builder.() -> Unit): Navigator =
+            Builder { start, map -> Navigator(start, map) }
+                .apply { block() }.build()
+
+        @Composable
+        fun NavHost(initial: IDestination, block: Builder.() -> Unit) {
+            val vm = viewModel {
+                build {
+                    block()
+                    start(initial)
+                }
+            }
+
+            vm.DisplayScaffold()
+        }
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/viewmodel/PeerEvalsGradingVM.kt

@@ -0,0 +1,9 @@
+package com.jaytux.grader.viewmodel
+
+import androidx.lifecycle.ViewModel
+import com.jaytux.grader.data.v2.BaseAssignment
+import com.jaytux.grader.data.v2.Course
+import com.jaytux.grader.data.v2.Edition
+
+class PeerEvalsGradingVM(val course: Course, val edition: Edition, val base: BaseAssignment) : ViewModel() {
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/viewmodel/SnackVM.kt

@@ -0,0 +1,28 @@
+package com.jaytux.grader.viewmodel
+
+import androidx.compose.material3.SnackbarHostState
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.flow.receiveAsFlow
+import kotlinx.coroutines.launch
+
+class SnackVM : ViewModel() {
+    private val _snacks = Channel<String>()
+    val snacks = _snacks.receiveAsFlow()
+
+    fun show(msg: String): Unit {
+        viewModelScope.launch {
+            _snacks.send(msg)
+        }
+    }
+
+    @Composable
+    fun Launcher(state: SnackbarHostState) {
+        LaunchedEffect(Unit) {
+            snacks.collect { snack -> state.showSnackbar(snack) }
+        }
+    }
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/viewmodel/SolosGradingVM.kt

@@ -0,0 +1,9 @@
+package com.jaytux.grader.viewmodel
+
+import androidx.lifecycle.ViewModel
+import com.jaytux.grader.data.v2.BaseAssignment
+import com.jaytux.grader.data.v2.Course
+import com.jaytux.grader.data.v2.Edition
+
+class SolosGradingVM(val course: Course, val edition: Edition, val base: BaseAssignment) : ViewModel() {
+}

composeApp/src/desktopMain/kotlin/com/jaytux/grader/viewmodel/UiGradeType.kt

@@ -0,0 +1,20 @@
+package com.jaytux.grader.viewmodel
+
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import com.jaytux.grader.data.v2.BaseFeedback
+import com.jaytux.grader.data.v2.CategoricGrade
+import com.jaytux.grader.data.v2.CategoricGradeOption
+import com.jaytux.grader.data.v2.Criterion
+import com.jaytux.grader.data.v2.GradeType
+import com.jaytux.grader.data.v2.NumericGrade
+import com.jaytux.grader.maxN
+import org.jetbrains.exposed.v1.core.Transaction
+
+sealed class UiGradeType {
+    object FreeText : UiGradeType()
+    object Percentage : UiGradeType()
+    data class Numeric(val grade: NumericGrade) : UiGradeType()
+    data class Categoric(val options: List<CategoricGradeOption>, val grade: CategoricGrade) : UiGradeType()
+}

gradle/libs.versions.toml

@@ -1,33 +1,38 @@
 [versions]
-androidx-lifecycle = "2.8.4"
-compose-multiplatform = "1.8.1"
+androidx-lifecycle = "2.9.6"
+compose-multiplatform = "1.9.0"
 junit = "4.13.2"
-kotlin = "2.1.0"
+kotlin = "2.3.0"
 kotlinx-coroutines = "1.10.1"
-exposed = "0.59.0"
-material3 = "1.7.3"
+exposed = "1.1.1"
+material3 = "1.9.0"
 ui-android = "1.7.8"
 foundation-layout-android = "1.7.8"
 rtf = "1.0.0-rc11"
 filekit = "0.10.0-beta04"
+directories = "26"
+androidx-activity-compose = "1.12.2"
 
 [libraries]
 kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test", version.ref = "kotlin" }
 kotlin-test-junit = { module = "org.jetbrains.kotlin:kotlin-test-junit", version.ref = "kotlin" }
 junit = { group = "junit", name = "junit", version.ref = "junit" }
 androidx-lifecycle-viewmodel = { group = "org.jetbrains.androidx.lifecycle", name = "lifecycle-viewmodel", version.ref = "androidx-lifecycle" }
+androidx-lifecycle-viewmodel-compose = { group = "org.jetbrains.androidx.lifecycle", name = "lifecycle-viewmodel-compose", version.ref = "androidx-lifecycle" }
+androidx-activity-compose = { module = "androidx.activity:activity-compose", version.ref = "androidx-activity-compose" }
+compose-backhandler = { module = "org.jetbrains.compose.ui:ui-backhandler", version.ref = "compose-multiplatform" }
 androidx-lifecycle-runtime-compose = { group = "org.jetbrains.androidx.lifecycle", name = "lifecycle-runtime-compose", version.ref = "androidx-lifecycle" }
 kotlinx-coroutines-swing = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-swing", version.ref = "kotlinx-coroutines" }
 exposed-core = { group = "org.jetbrains.exposed", name = "exposed-core", version.ref = "exposed" }
 exposed-dao = { group = "org.jetbrains.exposed", name = "exposed-dao", version.ref = "exposed" }
 exposed-jdbc = { group = "org.jetbrains.exposed", name = "exposed-jdbc", version.ref = "exposed" }
-exposed-migration = { group = "org.jetbrains.exposed", name = "exposed-migration", version.ref = "exposed" }
+exposed-migration = { group = "org.jetbrains.exposed", name = "exposed-migration-core", version.ref = "exposed" }
+exposed-migration-jdbc = { group = "org.jetbrains.exposed", name = "exposed-migration-jdbc", version.ref = "exposed" }
 exposed-kotlin-datetime = { group = "org.jetbrains.exposed", name = "exposed-kotlin-datetime", version.ref = "exposed" }
 sqlite = { group = "org.xerial", name = "sqlite-jdbc", version = "3.34.0" }
 sl4j = { group = "org.slf4j", name = "slf4j-simple", version = "2.0.12" }
 material3-core = { group = "org.jetbrains.compose.material3", name = "material3", version.ref = "material3" }
 material3-desktop = { group = "org.jetbrains.compose.material3", name = "material3-desktop", version.ref = "material3" }
-material-icons = { group = "org.jetbrains.compose.material", name = "material-icons-extended", version.ref = "material3" }
 androidx-ui-android = { group = "androidx.compose.ui", name = "ui-android", version.ref = "ui-android" }
 androidx-foundation-layout-android = { group = "androidx.compose.foundation", name = "foundation-layout-android", version.ref = "foundation-layout-android" }
 rtfield = { group = "com.mohamedrejeb.richeditor", name = "richeditor-compose", version.ref = "rtf" }
@@ -35,6 +40,7 @@ filekit-core = { group = "io.github.vinceglb", name = "filekit-core", version.re
 filekit-dialogs = { group = "io.github.vinceglb", name = "filekit-dialogs", version.ref = "filekit" }
 filekit-dialogs-compose = { group = "io.github.vinceglb", name = "filekit-dialogs-compose", version.ref = "filekit" }
 filekit-coil = { group = "io.github.vinceglb", name = "filekit-coil", version.ref = "filekit" }
+directories = { group = "dev.dirs", name = "directories", version.ref = "directories" }
 
 [plugins]
 composeMultiplatform = { id = "org.jetbrains.compose", version.ref = "compose-multiplatform" }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-all.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -86,8 +86,7 @@ done
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
 # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
-' "$PWD" ) || exit
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -115,7 +114,6 @@ case "$( uname )" in                #(
   NONSTOP* )        nonstop=true ;;
 esac
 
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
 
 # Determine the Java command to use to start the JVM.
@@ -173,7 +171,6 @@ fi
 # For Cygwin or MSYS, switch paths to Windows format before running java
 if "$cygwin" || "$msys" ; then
     APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
-    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
 
     JAVACMD=$( cygpath --unix "$JAVACMD" )
 
@@ -206,15 +203,14 @@ fi
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Collect all arguments for the java command:
-#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
 #     and any embedded shellness will be escaped.
 #   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
 #     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
-        -classpath "$CLASSPATH" \
-        org.gradle.wrapper.GradleWrapperMain \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
         "$@"
 
 # Stop when "xargs" is not available.

gradlew.bat

@@ -70,11 +70,10 @@ goto fail
 :execute
 @rem Setup the command line
 
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
 
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
 
 :end
 @rem End local scope for the variables with windows NT shell