feat: support MessageAppend event

website embeds show up right away now

Signed-off-by: Infi <wingit@geist.ga>

app/src/main/java/chat/revolt/api/realtime/RealtimeSocket.kt

@@ -12,6 +12,7 @@ import chat.revolt.api.realtime.frames.receivable.ChannelAckFrame
 import chat.revolt.api.realtime.frames.receivable.ChannelStartTypingFrame
 import chat.revolt.api.realtime.frames.receivable.ChannelStopTypingFrame
 import chat.revolt.api.realtime.frames.receivable.ChannelUpdateFrame
+import chat.revolt.api.realtime.frames.receivable.MessageAppendFrame
 import chat.revolt.api.realtime.frames.receivable.MessageFrame
 import chat.revolt.api.realtime.frames.receivable.MessageUpdateFrame
 import chat.revolt.api.realtime.frames.receivable.PongFrame
@@ -176,6 +177,33 @@ object RealtimeSocket {
                 }
             }
 
+            "MessageAppend" -> {
+                val messageAppendFrame =
+                    RevoltJson.decodeFromString(MessageAppendFrame.serializer(), rawFrame)
+                Log.d(
+                    "RealtimeSocket",
+                    "Received message append frame for ${messageAppendFrame.id} in channel ${messageAppendFrame.channel}."
+                )
+
+                var message = RevoltAPI.messageCache[messageAppendFrame.id]
+
+                if (message == null) {
+                    Log.d(
+                        "RealtimeSocket",
+                        "Message ${messageAppendFrame.id} not found in cache. Will not append."
+                    )
+                    return
+                }
+
+                messageAppendFrame.append.embeds?.let {
+                    message = message!!.copy(embeds = message!!.embeds?.plus(it) ?: it)
+                }
+
+                RevoltAPI.messageCache[messageAppendFrame.id] = message!!
+
+                RevoltAPI.wsFrameChannel.send(messageAppendFrame)
+            }
+
             "MessageUpdate" -> {
                 val messageUpdateFrame =
                     RevoltJson.decodeFromString(MessageUpdateFrame.serializer(), rawFrame)

app/src/main/java/chat/revolt/screens/chat/views/channel/ChannelScreenViewModel.kt

@@ -19,6 +19,7 @@ import chat.revolt.api.internals.ULID
 import chat.revolt.api.realtime.RealtimeSocketFrames
 import chat.revolt.api.realtime.frames.receivable.ChannelStartTypingFrame
 import chat.revolt.api.realtime.frames.receivable.ChannelStopTypingFrame
+import chat.revolt.api.realtime.frames.receivable.MessageAppendFrame
 import chat.revolt.api.realtime.frames.receivable.MessageDeleteFrame
 import chat.revolt.api.realtime.frames.receivable.MessageFrame
 import chat.revolt.api.realtime.frames.receivable.MessageUpdateFrame
@@ -319,6 +320,24 @@ class ChannelScreenViewModel : ViewModel() {
                         })
                     }
 
+                    is MessageAppendFrame -> {
+                        if (it.channel != activeChannel?.id) return@onEach
+
+                        val hasMessage = renderableMessages.any { currentMsg ->
+                            currentMsg.id == it.id
+                        }
+
+                        if (!hasMessage) return@onEach
+
+                        regroupMessages(renderableMessages.map { currentMsg ->
+                            if (currentMsg.id == it.id) {
+                                RevoltAPI.messageCache[it.id] ?: currentMsg
+                            } else {
+                                currentMsg
+                            }
+                        })
+                    }
+
                     is MessageDeleteFrame -> {
                         if (it.channel != activeChannel?.id) return@onEach