Timeline : introduce loadReplyDetails api

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/timeline/Timeline.kt

@@ -28,6 +28,7 @@ import io.element.android.libraries.matrix.api.media.VideoInfo
 import io.element.android.libraries.matrix.api.poll.PollKind
 import io.element.android.libraries.matrix.api.room.Mention
 import io.element.android.libraries.matrix.api.room.location.AssetType
+import io.element.android.libraries.matrix.api.timeline.item.event.InReplyTo
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.StateFlow
 import java.io.File
@@ -168,4 +169,6 @@ interface Timeline : AutoCloseable {
         waveform: List<Float>,
         progressCallback: ProgressCallback?
     ): Result<MediaUploadHandler>
+
+    suspend fun loadReplyDetails(eventId: EventId): Result<InReplyTo>
 }

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/timeline/RustTimeline.kt

@@ -33,6 +33,7 @@ import io.element.android.libraries.matrix.api.timeline.MatrixTimelineItem
 import io.element.android.libraries.matrix.api.timeline.ReceiptType
 import io.element.android.libraries.matrix.api.timeline.Timeline
 import io.element.android.libraries.matrix.api.timeline.TimelineException
+import io.element.android.libraries.matrix.api.timeline.item.event.InReplyTo
 import io.element.android.libraries.matrix.impl.core.toProgressWatcher
 import io.element.android.libraries.matrix.impl.media.MediaUploadHandlerImpl
 import io.element.android.libraries.matrix.impl.media.map
@@ -41,7 +42,6 @@ import io.element.android.libraries.matrix.impl.poll.toInner
 import io.element.android.libraries.matrix.impl.room.RoomContentForwarder
 import io.element.android.libraries.matrix.impl.room.location.toInner
 import io.element.android.libraries.matrix.impl.room.map
-import io.element.android.libraries.matrix.impl.timeline.item.event.EventMessageMapper
 import io.element.android.libraries.matrix.impl.timeline.item.event.EventTimelineItemMapper
 import io.element.android.libraries.matrix.impl.timeline.item.event.TimelineEventContentMapper
 import io.element.android.libraries.matrix.impl.timeline.item.virtual.VirtualTimelineItemMapper
@@ -49,6 +49,7 @@ import io.element.android.libraries.matrix.impl.timeline.postprocessor.LastForwa
 import io.element.android.libraries.matrix.impl.timeline.postprocessor.LoadingIndicatorsPostProcessor
 import io.element.android.libraries.matrix.impl.timeline.postprocessor.RoomBeginningPostProcessor
 import io.element.android.libraries.matrix.impl.timeline.postprocessor.TimelineEncryptedHistoryPostProcessor
+import io.element.android.libraries.matrix.impl.timeline.reply.InReplyToMapper
 import io.element.android.services.toolbox.api.systemclock.SystemClock
 import kotlinx.coroutines.CompletableDeferred
 import kotlinx.coroutines.CoroutineDispatcher
@@ -118,14 +119,14 @@ class RustTimeline(
     private val loadingIndicatorsPostProcessor = LoadingIndicatorsPostProcessor(systemClock)
     private val lastForwardIndicatorsPostProcessor = LastForwardIndicatorsPostProcessor(isLive)
 
+    private val timelineEventContentMapper = TimelineEventContentMapper()
+    private val inReplyToMapper = InReplyToMapper(timelineEventContentMapper)
     private val timelineItemFactory = MatrixTimelineItemMapper(
         fetchDetailsForEvent = this::fetchDetailsForEvent,
         roomCoroutineScope = roomCoroutineScope,
         virtualTimelineItemMapper = VirtualTimelineItemMapper(),
         eventTimelineItemMapper = EventTimelineItemMapper(
-            contentMapper = TimelineEventContentMapper(
-                eventMessageMapper = EventMessageMapper()
-            )
+            contentMapper = timelineEventContentMapper
         )
     )
 
@@ -580,4 +581,10 @@ class RustTimeline(
             inner.fetchDetailsForEvent(eventId.value)
         }
     }
+
+    override suspend fun loadReplyDetails(eventId: EventId): Result<InReplyTo> {
+        return runCatching {
+            inner.loadReplyDetails(eventId.value).use(inReplyToMapper::map)
+        }
+    }
 }

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/timeline/item/event/EventMessageMapper.kt

@@ -16,8 +16,6 @@
 
 package io.element.android.libraries.matrix.impl.timeline.item.event
 
-import io.element.android.libraries.matrix.api.core.EventId
-import io.element.android.libraries.matrix.api.core.UserId
 import io.element.android.libraries.matrix.api.timeline.item.event.AudioMessageType
 import io.element.android.libraries.matrix.api.timeline.item.event.EmoteMessageType
 import io.element.android.libraries.matrix.api.timeline.item.event.FileMessageType
@@ -33,42 +31,20 @@ import io.element.android.libraries.matrix.api.timeline.item.event.TextMessageTy
 import io.element.android.libraries.matrix.api.timeline.item.event.VideoMessageType
 import io.element.android.libraries.matrix.api.timeline.item.event.VoiceMessageType
 import io.element.android.libraries.matrix.impl.media.map
+import io.element.android.libraries.matrix.impl.timeline.reply.InReplyToMapper
 import org.matrix.rustcomponents.sdk.Message
 import org.matrix.rustcomponents.sdk.MessageType
-import org.matrix.rustcomponents.sdk.RepliedToEventDetails
 import org.matrix.rustcomponents.sdk.use
 import org.matrix.rustcomponents.sdk.FormattedBody as RustFormattedBody
 import org.matrix.rustcomponents.sdk.MessageFormat as RustMessageFormat
 import org.matrix.rustcomponents.sdk.MessageType as RustMessageType
 
 class EventMessageMapper {
-    private val timelineEventContentMapper by lazy { TimelineEventContentMapper() }
+    private val inReplyToMapper by lazy { InReplyToMapper(TimelineEventContentMapper()) }
 
     fun map(message: Message): MessageContent = message.use {
         val type = it.msgtype().use(this::mapMessageType)
-        val inReplyToEvent: InReplyTo? = it.inReplyTo()?.use { details ->
-            val inReplyToId = EventId(details.eventId)
-            when (val event = details.event) {
-                is RepliedToEventDetails.Ready -> {
-                    InReplyTo.Ready(
-                        eventId = inReplyToId,
-                        content = timelineEventContentMapper.map(event.content),
-                        senderId = UserId(event.sender),
-                        senderProfile = event.senderProfile.map(),
-                    )
-                }
-                is RepliedToEventDetails.Error -> InReplyTo.Error(
-                    eventId = inReplyToId,
-                    message = event.message,
-                )
-                RepliedToEventDetails.Pending -> InReplyTo.Pending(
-                    eventId = inReplyToId,
-                )
-                is RepliedToEventDetails.Unavailable -> InReplyTo.NotLoaded(
-                    eventId = inReplyToId
-                )
-            }
-        }
+        val inReplyToEvent: InReplyTo? = it.inReplyTo()?.use(inReplyToMapper::map)
         MessageContent(
             body = it.body(),
             inReplyTo = inReplyToEvent,

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/timeline/reply/InReplyToMapper.kt

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2024 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.element.android.libraries.matrix.impl.timeline.reply
+
+import io.element.android.libraries.matrix.api.core.EventId
+import io.element.android.libraries.matrix.api.core.UserId
+import io.element.android.libraries.matrix.api.timeline.item.event.InReplyTo
+import io.element.android.libraries.matrix.impl.timeline.item.event.TimelineEventContentMapper
+import io.element.android.libraries.matrix.impl.timeline.item.event.map
+import org.matrix.rustcomponents.sdk.InReplyToDetails
+import org.matrix.rustcomponents.sdk.RepliedToEventDetails
+
+class InReplyToMapper(
+    private val timelineEventContentMapper: TimelineEventContentMapper,
+) {
+
+    fun map(inReplyToDetails: InReplyToDetails): InReplyTo {
+        val inReplyToId = EventId(inReplyToDetails.eventId)
+        return when (val event = inReplyToDetails.event) {
+            is RepliedToEventDetails.Ready -> {
+                InReplyTo.Ready(
+                    eventId = inReplyToId,
+                    content = timelineEventContentMapper.map(event.content),
+                    senderId = UserId(event.sender),
+                    senderProfile = event.senderProfile.map(),
+                )
+            }
+            is RepliedToEventDetails.Error -> InReplyTo.Error(
+                eventId = inReplyToId,
+                message = event.message,
+            )
+            RepliedToEventDetails.Pending -> InReplyTo.Pending(
+                eventId = inReplyToId,
+            )
+            is RepliedToEventDetails.Unavailable -> InReplyTo.NotLoaded(
+                eventId = inReplyToId
+            )
+        }
+    }
+}

libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/timeline/FakeTimeline.kt

@@ -31,6 +31,7 @@ import io.element.android.libraries.matrix.api.room.location.AssetType
 import io.element.android.libraries.matrix.api.timeline.MatrixTimelineItem
 import io.element.android.libraries.matrix.api.timeline.ReceiptType
 import io.element.android.libraries.matrix.api.timeline.Timeline
+import io.element.android.libraries.matrix.api.timeline.item.event.InReplyTo
 import io.element.android.libraries.matrix.test.media.FakeMediaUploadHandler
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
@@ -370,6 +371,12 @@ class FakeTimeline(
         }
     }
 
+    var loadReplyDetailsLambda: (eventId: EventId) -> Result<InReplyTo> = {
+        Result.success(InReplyTo.NotLoaded(it))
+    }
+
+    override suspend fun loadReplyDetails(eventId: EventId) = loadReplyDetailsLambda(eventId)
+
     var closeCounter = 0
         private set