Performance improvements for date indicator string

Author: martinmitrevski

Sources/StreamChatSwiftUI/ChatChannel/ChatChannelView.swift

@@ -55,6 +55,11 @@ public struct ChatChannelView<Factory: ViewFactory>: View, KeyboardReadable {
                     }
                 }
             )
+            .overlay(
+                viewModel.currentDateString != nil ?
+                    factory.makeDateIndicatorView(dateString: viewModel.currentDateString!)
+                    : nil
+            )
 
             Divider()
                 .navigationBarBackButtonHidden(viewModel.reactionsShown)

Sources/StreamChatSwiftUI/ChatChannel/ChatChannelViewModel.swift

@@ -134,9 +134,9 @@ open class ChatChannelViewModel: ObservableObject, MessagesDataSource {
     public func handleMessageAppear(index: Int) {
         let message = messages[index]
         checkForNewMessages(index: index)
-//        if utils.messageListConfig.dateIndicatorPlacement == .overlay {
-//            save(lastDate: message.createdAt)
-//        }
+        if utils.messageListConfig.dateIndicatorPlacement == .overlay {
+            save(lastDate: message.createdAt)
+        }
         if index == 0 {
             maybeSendReadEvent(for: message)
         }

Sources/StreamChatSwiftUI/ChatChannel/MessageList/MessageListView.swift

@@ -176,10 +176,6 @@ public struct MessageListView<Factory: ViewFactory>: View, KeyboardReadable {
                     onScrollToBottom: onScrollToBottom
                 )
             }
-            
-            if let date = currentDateString {
-                factory.makeDateIndicatorView(dateString: date)
-            }
 
             if shouldShowTypingIndicator {
                 TypingIndicatorBottomView(