Max selections support

features/poll/api/src/main/kotlin/io/element/android/features/poll/api/actions/SendPollResponseAction.kt

@@ -15,6 +15,6 @@ interface SendPollResponseAction {
     suspend fun execute(
         timeline: Timeline,
         pollStartId: EventId,
-        answerId: String
+        answerIds: List<String>
     ): Result<Unit>
 }

features/poll/api/src/main/kotlin/io/element/android/features/poll/api/pollcontent/PollContentState.kt

@@ -18,6 +18,7 @@ import kotlinx.collections.immutable.ImmutableList
  * @property question the poll question.
  * @property answerItems the list of answers.
  * @property pollKind the kind of poll.
+ * @property maxSelections the maximum number of selections allowed.
  * @property isPollEditable whether the poll is editable.
  * @property isPollEnded whether the poll is ended.
  * @property isMine whether the poll has been created by me.
@@ -27,7 +28,10 @@ data class PollContentState(
     val question: String,
     val answerItems: ImmutableList<PollAnswerItem>,
     val pollKind: PollKind,
+    val maxSelections: ULong,
     val isPollEditable: Boolean,
     val isPollEnded: Boolean,
     val isMine: Boolean,
-)
+) {
+    val isMultipleSelection: Boolean get() = maxSelections > 1u
+}

features/poll/api/src/main/kotlin/io/element/android/features/poll/api/pollcontent/PollContentStateFixtures.kt

@@ -84,6 +84,7 @@ fun aPollContentState(
     hasVotes: Boolean = true,
     question: String = aPollQuestion(),
     pollKind: PollKind = PollKind.Disclosed,
+    maxSelections: ULong = 1u,
     answerItems: ImmutableList<PollAnswerItem> = aPollAnswerItemList(
         isEnded = isEnded,
         showVotes = showVotes,
@@ -94,6 +95,7 @@ fun aPollContentState(
     question = question,
     answerItems = answerItems,
     pollKind = pollKind,
+    maxSelections = maxSelections,
     isPollEditable = isMine && !isEnded && isPollEditable,
     isPollEnded = isEnded,
     isMine = isMine,

features/poll/api/src/main/kotlin/io/element/android/features/poll/api/pollcontent/PollContentView.kt

@@ -40,7 +40,7 @@ import kotlinx.collections.immutable.ImmutableList
 @Composable
 fun PollContentView(
     state: PollContentState,
-    onSelectAnswer: (pollStartId: EventId, answerId: String) -> Unit,
+    onSelectAnswer: (pollStartId: EventId, answerIds: List<String>) -> Unit,
     onEditPoll: (pollStartId: EventId) -> Unit,
     onEndPoll: (pollStartId: EventId) -> Unit,
     modifier: Modifier = Modifier,
@@ -50,6 +50,8 @@ fun PollContentView(
         question = state.question,
         answerItems = state.answerItems,
         pollKind = state.pollKind,
+        isMultipleSelection = state.isMultipleSelection,
+        maxSelections = state.maxSelections,
         isPollEditable = state.isPollEditable,
         isPollEnded = state.isPollEnded,
         isMine = state.isMine,
@@ -66,10 +68,12 @@ fun PollContentView(
     question: String,
     answerItems: ImmutableList<PollAnswerItem>,
     pollKind: PollKind,
+    isMultipleSelection: Boolean,
+    maxSelections: ULong,
     isPollEditable: Boolean,
     isPollEnded: Boolean,
     isMine: Boolean,
-    onSelectAnswer: (pollStartId: EventId, answerId: String) -> Unit,
+    onSelectAnswer: (pollStartId: EventId, answerIds: List<String>) -> Unit,
     onEditPoll: (pollStartId: EventId) -> Unit,
     onEndPoll: (pollStartId: EventId) -> Unit,
     modifier: Modifier = Modifier,
@@ -77,7 +81,23 @@ fun PollContentView(
     val votesCount = remember(answerItems) { answerItems.sumOf { it.votesCount } }
 
     fun onSelectAnswer(pollAnswer: PollAnswer) {
-        eventId?.let { onSelectAnswer(it, pollAnswer.id) }
+        eventId?.let {
+            if (isMultipleSelection) {
+                val newSelections = answerItems.map { item ->
+                    if (item.answer.id == pollAnswer.id) {
+                        item.copy(isSelected = !item.isSelected)
+                    } else {
+                        item
+                    }
+                }.filter { it.isSelected }.map { it.answer.id }
+                // Only send the response if the selection count is within the limit
+                if (newSelections.size <= maxSelections.toInt()) {
+                    onSelectAnswer(it, newSelections)
+                }
+            } else {
+                onSelectAnswer(it, listOf(pollAnswer.id))
+            }
+        }
     }
 
     fun onEditPoll() {
@@ -107,7 +127,11 @@ fun PollContentView(
     ) {
         PollTitleView(title = question, isPollEnded = isPollEnded)
 
-        PollAnswers(answerItems = answerItems, onSelectAnswer = ::onSelectAnswer)
+        PollAnswers(
+            answerItems = answerItems,
+            isMultipleSelection = isMultipleSelection,
+            onSelectAnswer = ::onSelectAnswer,
+        )
 
         if (isPollEnded || pollKind == PollKind.Disclosed) {
             DisclosedPollBottomNotice(votesCount = votesCount)
@@ -130,8 +154,10 @@ fun PollContentView(
 @Composable
 private fun PollAnswers(
     answerItems: ImmutableList<PollAnswerItem>,
+    isMultipleSelection: Boolean,
     onSelectAnswer: (PollAnswer) -> Unit,
 ) {
+    val role = if (isMultipleSelection) Role.Checkbox else Role.RadioButton
     Column(
         modifier = Modifier.selectableGroup(),
         verticalArrangement = Arrangement.spacedBy(16.dp),
@@ -144,7 +170,7 @@ private fun PollAnswers(
                         selected = it.isSelected,
                         enabled = it.isEnabled,
                         onClick = { onSelectAnswer(it.answer) },
-                        role = Role.RadioButton,
+                        role = role,
                     ),
             )
         }
@@ -207,6 +233,8 @@ internal fun PollContentViewUndisclosedPreview() = ElementPreview {
         question = "What type of food should we have at the party?",
         answerItems = aPollAnswerItemList(showVotes = false),
         pollKind = PollKind.Undisclosed,
+        isMultipleSelection = false,
+        maxSelections = 1u,
         isPollEnded = false,
         isPollEditable = false,
         isMine = false,
@@ -224,6 +252,27 @@ internal fun PollContentViewDisclosedPreview() = ElementPreview {
         question = "What type of food should we have at the party?",
         answerItems = aPollAnswerItemList(),
         pollKind = PollKind.Disclosed,
+        isMultipleSelection = false,
+        maxSelections = 1u,
+        isPollEnded = false,
+        isPollEditable = false,
+        isMine = false,
+        onSelectAnswer = { _, _ -> },
+        onEditPoll = {},
+        onEndPoll = {},
+    )
+}
+
+@PreviewsDayNight
+@Composable
+internal fun PollContentViewMultipleSelectionPreview() = ElementPreview {
+    PollContentView(
+        eventId = EventId("\$anEventId"),
+        question = "What type of food should we have at the party?",
+        answerItems = aPollAnswerItemList(),
+        pollKind = PollKind.Disclosed,
+        isMultipleSelection = true,
+        maxSelections = 3u,
         isPollEnded = false,
         isPollEditable = false,
         isMine = false,
@@ -241,6 +290,8 @@ internal fun PollContentViewEndedPreview() = ElementPreview {
         question = "What type of food should we have at the party?",
         answerItems = aPollAnswerItemList(isEnded = true),
         pollKind = PollKind.Disclosed,
+        isMultipleSelection = false,
+        maxSelections = 1u,
         isPollEnded = true,
         isPollEditable = false,
         isMine = false,
@@ -258,6 +309,8 @@ internal fun PollContentViewCreatorEditablePreview() = ElementPreview {
         question = "What type of food should we have at the party?",
         answerItems = aPollAnswerItemList(hasVotes = false, isEnded = false),
         pollKind = PollKind.Disclosed,
+        isMultipleSelection = false,
+        maxSelections = 1u,
         isPollEnded = false,
         isPollEditable = true,
         isMine = true,
@@ -275,6 +328,8 @@ internal fun PollContentViewCreatorPreview() = ElementPreview {
         question = "What type of food should we have at the party?",
         answerItems = aPollAnswerItemList(isEnded = false),
         pollKind = PollKind.Disclosed,
+        isMultipleSelection = false,
+        maxSelections = 1u,
         isPollEnded = false,
         isPollEditable = false,
         isMine = true,
@@ -292,6 +347,8 @@ internal fun PollContentViewCreatorEndedPreview() = ElementPreview {
         question = "What type of food should we have at the party?",
         answerItems = aPollAnswerItemList(isEnded = true),
         pollKind = PollKind.Disclosed,
+        isMultipleSelection = false,
+        maxSelections = 1u,
         isPollEnded = true,
         isPollEditable = false,
         isMine = true,