WIP: show attachment full screen

Session/Media Viewing & Editing/MediaGalleryViewModel.swift

@@ -566,13 +566,14 @@ public class MediaGalleryViewModel {
         return navController
     }
     
+    @ViewBuilder
     public static func createDetailViewSwiftUI(
         for threadId: String,
         threadVariant: SessionThread.Variant,
         interactionId: Int64,
         selectedAttachmentId: String,
         options: [MediaGalleryOption]
-    ) -> (any UIViewControllerRepresentable)? {
+    ) -> some View {
         // Load the data for the album immediately (needed before pushing to the screen so
         // transitions work nicely)
         let viewModel: MediaGalleryViewModel = MediaGalleryViewModel(
@@ -581,16 +582,15 @@ public class MediaGalleryViewModel {
             isPagedData: false,
             mediaType: .media
         )
-        viewModel.loadAndCacheAlbumData(for: interactionId, in: threadId)
-        viewModel.replaceAlbumObservation(toObservationFor: interactionId)
+        let _ = viewModel.loadAndCacheAlbumData(for: interactionId, in: threadId)
+        let _ = viewModel.replaceAlbumObservation(toObservationFor: interactionId)
         
-        guard
+        if
             !viewModel.albumData.isEmpty,
             let initialItem: Item = viewModel.albumData[interactionId]?.first(where: { item -> Bool in
                 item.attachment.id == selectedAttachmentId
             })
-        else { return nil }
-        
+        {
             let pageViewController: MediaPageViewController = MediaPageViewController(
                 viewModel: viewModel,
                 initialItem: initialItem,
@@ -600,8 +600,11 @@ public class MediaGalleryViewModel {
                 viewControllers: [pageViewController],
                 transitioningDelegate: pageViewController
             )
-        
-        return navController
+            navController
+        }
+        else {
+            EmptyView()
+        }
     }
     
     public static func createMediaTileViewController(

Session/Media Viewing & Editing/MessageInfoView.swift

@@ -6,6 +6,7 @@ import SessionSnodeKit
 
 struct MessageInfoView: View {
     @State var index = 1
+    @State var showingAttachmentFullScreen = false
     var actions: [ContextMenuVC.Action]
     var messageViewModel: MessageViewModel
     var isMessageFailed: Bool {
@@ -98,6 +99,8 @@ struct MessageInfoView: View {
                         }
                         
                         if let attachments = messageViewModel.attachments {
+                            let attachment: Attachment = attachments[(index - 1 + attachments.count) % attachments.count]
+                            
                             ZStack(alignment: .bottomTrailing) {
                                 if attachments.count > 1 {
                                     // Attachment carousel view
@@ -135,7 +138,7 @@ struct MessageInfoView: View {
                                 }
                                 
                                 Button {
-                                    // TODO: full screen function
+                                    self.showingAttachmentFullScreen.toggle()
                                 } label: {
                                     ZStack {
                                         Circle()
@@ -146,6 +149,15 @@ struct MessageInfoView: View {
                                     }
                                     .frame(width: 26, height: 26)
                                 }
+                                .sheet(isPresented: $showingAttachmentFullScreen) {
+                                    MediaGalleryViewModel.createDetailViewSwiftUI(
+                                        for: messageViewModel.threadId,
+                                        threadVariant: messageViewModel.threadVariant,
+                                        interactionId: messageViewModel.id,
+                                        selectedAttachmentId: attachment.id,
+                                        options: [ .sliderEnabled ]
+                                    )
+                                }
                                 .padding(
                                     EdgeInsets(
                                         top: 0,
@@ -165,7 +177,6 @@ struct MessageInfoView: View {
                             )
                             
                             // Attachment Info
-                            let attachment: Attachment = attachments[(index - 1 + attachments.count) % attachments.count]
                             ZStack {
                                 RoundedRectangle(cornerRadius: 17)
                                     .fill(themeColor: .backgroundSecondary)
@@ -406,19 +417,6 @@ struct MessageInfoView: View {
             }
         }
     }
-    
-    private func showMediaFullScreen(attachment: Attachment) {
-        let viewController: UIViewController? = MediaGalleryViewModel.createDetailViewController(
-            for: messageViewModel.threadId,
-            threadVariant: messageViewModel.threadVariant,
-            interactionId: messageViewModel.id,
-            selectedAttachmentId: attachment.id,
-            options: [ .sliderEnabled ]
-        )
-        if let viewController: UIViewController = viewController {
-            viewController.transitioningDelegate = nil
-        }
-    }
 }
 
 struct InfoBlock<Content>: View where Content: View {