Hook up the actions in the media details sheet. (#3607)

ElementX/Sources/Screens/MediaEventsTimelineScreen/MediaEventsTimelineScreenCoordinator.swift

@@ -20,7 +20,9 @@ struct MediaEventsTimelineScreenCoordinatorParameters {
     let userIndicatorController: UserIndicatorControllerProtocol
 }
 
-enum MediaEventsTimelineScreenCoordinatorAction { }
+enum MediaEventsTimelineScreenCoordinatorAction {
+    case viewInRoomTimeline(TimelineItemIdentifier)
+}
 
 final class MediaEventsTimelineScreenCoordinator: CoordinatorProtocol {
     private let parameters: MediaEventsTimelineScreenCoordinatorParameters
@@ -62,6 +64,15 @@ final class MediaEventsTimelineScreenCoordinator: CoordinatorProtocol {
                                                        filesTimelineViewModel: filesTimelineViewModel,
                                                        mediaProvider: parameters.mediaProvider,
                                                        userIndicatorController: parameters.userIndicatorController)
+        
+        viewModel.actionsPublisher
+            .sink { [weak self] action in
+                switch action {
+                case .viewInRoomTimeline(let itemID):
+                    self?.actionsSubject.send(.viewInRoomTimeline(itemID))
+                }
+            }
+            .store(in: &cancellables)
     }
     
     func toPresentable() -> AnyView {

ElementX/Sources/Screens/MediaEventsTimelineScreen/MediaEventsTimelineScreenModels.swift

@@ -7,7 +7,9 @@
 
 import Foundation
 
-enum MediaEventsTimelineScreenViewModelAction { }
+enum MediaEventsTimelineScreenViewModelAction {
+    case viewInRoomTimeline(TimelineItemIdentifier)
+}
 
 enum MediaEventsTimelineScreenMode {
     case media

ElementX/Sources/Screens/MediaEventsTimelineScreen/MediaEventsTimelineScreenViewModel.swift

@@ -26,6 +26,8 @@ class MediaEventsTimelineScreenViewModel: MediaEventsTimelineScreenViewModelType
         }
     }
     
+    private var mediaPreviewCancellable: AnyCancellable?
+    
     private let actionsSubject: PassthroughSubject<MediaEventsTimelineScreenViewModelAction, Never> = .init()
     var actionsPublisher: AnyPublisher<MediaEventsTimelineScreenViewModelAction, Never> {
         actionsSubject.eraseToAnyPublisher()
@@ -154,6 +156,21 @@ class MediaEventsTimelineScreenViewModel: MediaEventsTimelineScreenViewModelType
                                                       timelineViewModel: activeTimelineViewModel,
                                                       mediaProvider: mediaProvider,
                                                       userIndicatorController: userIndicatorController)
+        
+        mediaPreviewCancellable = viewModel.actions
+            .sink { [weak self] action in
+                guard let self else { return }
+                switch action {
+                case .viewInRoomTimeline(let itemID):
+                    state.bindings.mediaPreviewViewModel = nil
+                    actionsSubject.send(.viewInRoomTimeline(itemID))
+                case .dismiss:
+                    state.bindings.mediaPreviewViewModel = nil
+                case .loadedMediaFile:
+                    break // Handled by the preview controller
+                }
+            }
+        
         state.bindings.mediaPreviewViewModel = viewModel
     }
     

ElementX/Sources/Screens/MediaEventsTimelineScreen/View/MediaEventsTimelineScreen.swift

@@ -121,6 +121,7 @@ struct MediaEventsTimelineScreen: View {
             ProgressView()
                 .padding()
                 .opacity(context.viewState.isBackPaginating ? 1 : 0)
+                .scaleEffect(.init(width: 1, height: -1)) // Make sure it spins the right way around 🙃
             
             Rectangle()
                 .frame(height: 1)