[Message Actions] Forward messages (#635)

* Add forwarding messages base

* Make forwarding single-selection

---------

Co-authored-by: ElementBot <benoitm+elementbot@element.io>

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

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2023 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.api.room
+
+import io.element.android.libraries.matrix.api.core.RoomId
+
+class ForwardEventException(
+    val roomIds: List<RoomId>
+) : Exception() {
+
+    override val message: String? = "Failed to deliver event to $roomIds rooms"
+}

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

@@ -26,6 +26,7 @@ import io.element.android.libraries.matrix.api.media.FileInfo
 import io.element.android.libraries.matrix.api.media.ImageInfo
 import io.element.android.libraries.matrix.api.media.VideoInfo
 import io.element.android.libraries.matrix.api.timeline.MatrixTimeline
+import io.element.android.libraries.matrix.api.timeline.item.event.MessageContent
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.StateFlow
 import java.io.Closeable
@@ -84,6 +85,8 @@ interface MatrixRoom : Closeable {
 
     suspend fun sendReaction(emoji: String, eventId: EventId): Result<Unit>
 
+    suspend fun forwardEvent(eventId: EventId, rooms: List<RoomId>): Result<Unit>
+
     suspend fun retrySendMessage(transactionId: String): Result<Unit>
 
     suspend fun cancelSend(transactionId: String): Result<Unit>