[Message Actions] Add emoji reactions option (#568)

* Add logic to send message reactions

* Add emoji library, create EmojiPicker component

* Fix bottom sheet behaviors

---------

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

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

@@ -81,6 +81,8 @@ interface MatrixRoom : Closeable {
 
     suspend fun sendFile(file: File, fileInfo: FileInfo): Result<Unit>
 
+    suspend fun sendReaction(emoji: String, eventId: EventId): Result<Unit>
+
     suspend fun leave(): Result<Unit>
 
     suspend fun acceptInvitation(): Result<Unit>

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

@@ -259,6 +259,12 @@ class RustMatrixRoom(
         }
     }
 
+    override suspend fun sendReaction(emoji: String, eventId: EventId): Result<Unit> = withContext(Dispatchers.IO) {
+        runCatching {
+            innerRoom.sendReaction(key = emoji, eventId = eventId.value)
+        }
+    }
+
     @OptIn(ExperimentalUnsignedTypes::class)
     override suspend fun updateAvatar(mimeType: String, data: ByteArray): Result<Unit> =
         withContext(Dispatchers.IO) {

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

@@ -70,10 +70,14 @@ class FakeMatrixRoom(
     private var setTopicResult = Result.success(Unit)
     private var updateAvatarResult = Result.success(Unit)
     private var removeAvatarResult = Result.success(Unit)
+    private var sendReactionResult = Result.success(Unit)
 
     var sendMediaCount = 0
         private set
 
+    var sendReactionCount = 0
+        private set
+
     var isInviteAccepted: Boolean = false
         private set
 
@@ -124,6 +128,11 @@ class FakeMatrixRoom(
         return Result.success(Unit)
     }
 
+    override suspend fun sendReaction(emoji: String, eventId: EventId): Result<Unit> {
+        sendReactionCount++
+        return sendReactionResult
+    }
+
     var editMessageParameter: String? = null
         private set
 
@@ -279,4 +288,8 @@ class FakeMatrixRoom(
     fun givenSetTopicResult(result: Result<Unit>) {
         setTopicResult = result
     }
+
+    fun givenSendReactionResult(result: Result<Unit>) {
+        sendReactionResult = result
+    }
 }