Implemented message forwarding for media previews and media timelines (#4579)

* implemented message forwarding for media previews and media timelines

* updated tests

* pr suggestion

* fix tests

* fix tests

ElementX/Sources/Screens/RoomScreen/RoomScreenCoordinator.swift

@@ -181,6 +181,8 @@ final class RoomScreenCoordinator: CoordinatorProtocol {
                     actionsSubject.send(.presentKnockRequestsList)
                 case .displayRoom(let roomID, let via):
                     actionsSubject.send(.presentRoom(roomID: roomID, via: via))
+                case .displayMessageForwarding(let forwardingItem):
+                    actionsSubject.send(.presentMessageForwarding(forwardingItem: forwardingItem))
                 }
             }
             .store(in: &cancellables)

ElementX/Sources/Screens/RoomScreen/RoomScreenModels.swift

@@ -16,6 +16,7 @@ enum RoomScreenViewModelAction: Equatable {
     case removeComposerFocus
     case displayKnockRequests
     case displayRoom(roomID: String, via: [String])
+    case displayMessageForwarding(MessageForwardingItem)
 }
 
 enum RoomScreenViewAction {

ElementX/Sources/Screens/RoomScreen/RoomScreenViewModel.swift

@@ -136,11 +136,18 @@ class RoomScreenViewModel: RoomScreenViewModelType, RoomScreenViewModelProtocol
     
     func displayMediaPreview(_ mediaPreviewViewModel: TimelineMediaPreviewViewModel) {
         mediaPreviewViewModel.actions.sink { [weak self] action in
+            guard let self else { return }
             switch action {
-            case .viewInRoomTimeline:
-                fatalError("viewInRoomTimeline should not be visible on a room preview.")
             case .dismiss:
-                self?.state.bindings.mediaPreviewViewModel = nil
+                state.bindings.mediaPreviewViewModel = nil
+            case .displayMessageForwarding(let forwardingItem):
+                state.bindings.mediaPreviewViewModel = nil
+                // We need a small delay because we need to wait for the media preview to be fully dismissed.
+                DispatchQueue.main.asyncAfter(deadline: .now() + TimelineMediaPreviewViewModel.displayMessageForwardingDelay) {
+                    self.actionsSubject.send(.displayMessageForwarding(forwardingItem))
+                }
+            case .viewInRoomTimeline:
+                fatalError("\(action) should not be visible on a room preview.")
             }
         }
         .store(in: &cancellables)