Ensure getEventTimelineItemByEventId is called when we enter in reply mode.

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/messagecomposer/MessageComposerPresenter.kt

@@ -20,6 +20,7 @@ import android.Manifest
 import android.annotation.SuppressLint
 import android.net.Uri
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.getValue
@@ -151,15 +152,24 @@ class MessageComposerPresenter @Inject constructor(
             }
         }
 
+        DisposableEffect(Unit) {
+            onDispose {
+                appCoroutineScope.launch {
+                    room.exitReplyMode()
+                }
+            }
+        }
+
         fun handleEvents(event: MessageComposerEvents) {
             when (event) {
                 MessageComposerEvents.ToggleFullScreenState -> isFullScreen.value = !isFullScreen.value
-
                 MessageComposerEvents.CloseSpecialMode -> {
                     richTextEditorState.setHtml("")
                     messageComposerContext.composerMode = MessageComposerMode.Normal("")
+                    appCoroutineScope.launch {
+                        room.exitReplyMode()
+                    }
                 }
-
                 is MessageComposerEvents.SendMessage -> appCoroutineScope.sendMessage(
                     message = event.message,
                     updateComposerMode = { messageComposerContext.composerMode = it },
@@ -167,6 +177,13 @@ class MessageComposerPresenter @Inject constructor(
                 )
                 is MessageComposerEvents.SetMode -> {
                     messageComposerContext.composerMode = event.composerMode
+                    appCoroutineScope.launch {
+                        if (event.composerMode is MessageComposerMode.Reply) {
+                            room.enterReplyMode(event.composerMode.eventId)
+                        } else {
+                            room.exitReplyMode()
+                        }
+                    }
                 }
                 MessageComposerEvents.AddAttachment -> localCoroutineScope.launch {
                     showAttachmentSourcePicker = true

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/room/MatrixRoom.kt

@@ -89,6 +89,10 @@ interface MatrixRoom : Closeable {
 
     suspend fun editMessage(originalEventId: EventId?, transactionId: TransactionId?, body: String, htmlBody: String?): Result<Unit>
 
+    suspend fun enterReplyMode(eventId: EventId): Result<Unit>
+
+    suspend fun exitReplyMode(): Result<Unit>
+
     suspend fun replyMessage(eventId: EventId, body: String, htmlBody: String?): Result<Unit>
 
     suspend fun redactEvent(eventId: EventId, reason: String? = null): Result<Unit>
@@ -184,7 +188,4 @@ interface MatrixRoom : Closeable {
     suspend fun endPoll(pollStartId: EventId, text: String): Result<Unit>
 
     override fun close() = destroy()
-
 }
-
-

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/room/RustMatrixRoom.kt

@@ -60,6 +60,7 @@ import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.withContext
+import org.matrix.rustcomponents.sdk.EventTimelineItem
 import org.matrix.rustcomponents.sdk.RequiredState
 import org.matrix.rustcomponents.sdk.Room
 import org.matrix.rustcomponents.sdk.RoomListItem
@@ -261,11 +262,30 @@ class RustMatrixRoom(
             }
         }
 
+    private var inReplyToEventTimelineItem: EventTimelineItem? = null
+
+    override suspend fun enterReplyMode(eventId: EventId): Result<Unit> = withContext(roomDispatcher) {
+        runCatching {
+            inReplyToEventTimelineItem?.destroy()
+            inReplyToEventTimelineItem = null
+            inReplyToEventTimelineItem = innerRoom.getEventTimelineItemByEventId(eventId.value)
+        }
+    }
+
+    override suspend fun exitReplyMode(): Result<Unit> = withContext(roomDispatcher) {
+        runCatching {
+            inReplyToEventTimelineItem?.destroy()
+            inReplyToEventTimelineItem = null
+        }
+    }
+
     override suspend fun replyMessage(eventId: EventId, body: String, htmlBody: String?): Result<Unit> = withContext(roomDispatcher) {
         runCatching {
-            innerRoom.getEventTimelineItemByEventId(eventId.value).use { eventTimelineItem ->
+            val inReplyTo = inReplyToEventTimelineItem ?: innerRoom.getEventTimelineItemByEventId(eventId.value)
+            inReplyTo.use { eventTimelineItem ->
                 innerRoom.sendReply(messageEventContentFromParts(body, htmlBody), eventTimelineItem)
             }
+            inReplyToEventTimelineItem = null
         }
     }
 

libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/room/FakeMatrixRoom.kt

@@ -31,8 +31,8 @@ import io.element.android.libraries.matrix.api.notificationsettings.Notification
 import io.element.android.libraries.matrix.api.poll.PollKind
 import io.element.android.libraries.matrix.api.room.MatrixRoom
 import io.element.android.libraries.matrix.api.room.MatrixRoomMembersState
-import io.element.android.libraries.matrix.api.room.MessageEventType
 import io.element.android.libraries.matrix.api.room.MatrixRoomNotificationSettingsState
+import io.element.android.libraries.matrix.api.room.MessageEventType
 import io.element.android.libraries.matrix.api.room.StateEventType
 import io.element.android.libraries.matrix.api.room.location.AssetType
 import io.element.android.libraries.matrix.api.timeline.MatrixTimeline
@@ -208,6 +208,14 @@ class FakeMatrixRoom(
     var replyMessageParameter: Pair<String, String?>? = null
         private set
 
+    override suspend fun enterReplyMode(eventId: EventId): Result<Unit> {
+        return Result.success(Unit)
+    }
+
+    override suspend fun exitReplyMode(): Result<Unit> {
+        return Result.success(Unit)
+    }
+
     override suspend fun replyMessage(eventId: EventId, body: String, htmlBody: String?): Result<Unit> {
         replyMessageParameter = body to htmlBody
         return Result.success(Unit)