fixed bug with reactions in message threads

Author: martinmitrevski

Sources/StreamChatSwiftUI/ChatChannel/ChatChannelDataSource.swift

@@ -128,6 +128,13 @@ class MessageThreadDataSource: ChannelDataSource, ChatMessageControllerDelegate
         delegate?.dataSource(channelDataSource: self, didUpdateMessages: controller.replies)
     }
 
+    func messageController(
+        _ controller: ChatMessageController,
+        didChangeMessage change: EntityChange<ChatMessage>
+    ) {
+        delegate?.dataSource(channelDataSource: self, didUpdateMessages: controller.replies)
+    }
+    
     func loadPreviousMessages(
         before messageId: MessageId?,
         limit: Int,

Sources/StreamChatSwiftUI/ChatChannel/ChatChannelView.swift

@@ -87,7 +87,10 @@ public struct ChatChannelView<Factory: ViewFactory>: View {
                 : nil
         )
         .onAppear {
-            viewModel.reactionsShown = false
+            viewModel.onViewAppear()
+        }
+        .onDisappear {
+            viewModel.onViewDissappear()
         }
     }
 }

Sources/StreamChatSwiftUI/ChatChannel/ChatChannelViewModel.swift

@@ -27,6 +27,8 @@ public class ChatChannelViewModel: ObservableObject, MessagesDataSource {
             currentDateString = messageListDateOverlay.string(from: currentDate)
         }
     }
+
+    private var isActive = true
 
     private let messageListDateOverlay: DateFormatter = {
         let df = DateFormatter()
@@ -144,6 +146,10 @@ public class ChatChannelViewModel: ObservableObject, MessagesDataSource {
         channelDataSource: ChannelDataSource,
         didUpdateMessages messages: LazyCachedMapCollection<ChatMessage>
     ) {
+        if !isActive {
+            return
+        }
+        
         if let message = messageController?.message {
             var array = Array(messages)
             array.append(message)
@@ -182,6 +188,16 @@ public class ChatChannelViewModel: ObservableObject, MessagesDataSource {
         UIGraphicsEndImageContext()
     }
 
+    func onViewAppear() {
+        reactionsShown = false
+        isActive = true
+        messages = channelDataSource.messages
+    }
+    
+    func onViewDissappear() {
+        isActive = false
+    }
+    
     // MARK: - private
 
     private func checkForNewMessages(index: Int) {