Use transmission for snackbar, fix issue with ownership of currently viewed item

The list object of the root library view had ownership of the
currently selected item, so object modifications that removed
the item from the current library list (like move or archive)
could cause the object to be released and the current screen
to continue operating on an invalid object.

apple/OmnivoreKit/Sources/App/Views/AudioPlayer/ExpandedAudioPlayer.swift

@@ -24,9 +24,9 @@
     @State var showLabelsModal = false
     @State var showNotebookView = false
 
-    @State var showOperationToast = false
+    @State var showSnackbar = false
     @State var operationStatus: OperationStatus = .none
-    @State var operationMessage: String?
+    @State var snackbarMessage: String?
 
     var playPauseButtonImage: String {
       switch audioController.state {
@@ -384,8 +384,8 @@
 
     func playerContent(_: LinkedItemAudioProperties) -> some View {
       ZStack {
-        WindowLink(level: .alert, transition: .move(edge: .bottom), isPresented: $showOperationToast) {
+        WindowLink(level: .alert, transition: .move(edge: .bottom), isPresented: $showSnackbar) {
-          OperationToast(operationMessage: $operationMessage, showOperationToast: $showOperationToast, operationStatus: $operationStatus)
+          OperationToast(operationMessage: $snackbarMessage, showOperationToast: $showSnackbar, operationStatus: $operationStatus)
             .offset(y: -90)
         } label: {
           EmptyView()

apple/OmnivoreKit/Sources/App/Views/Home/Components/LibraryItemListNavigationLink.swift

@@ -29,29 +29,15 @@ struct LibraryItemListNavigationLink: View {
   @EnvironmentObject var dataService: DataService
   @EnvironmentObject var audioController: AudioController
 
-  @ObservedObject var item: Models.LibraryItem
+  let item: Models.LibraryItem
-  @ObservedObject var viewModel: HomeFeedViewModel
+  let viewModel: HomeFeedViewModel
 
   var body: some View {
-    ZStack {
+    Button(action: {
+      viewModel.presentItem(item: item)
+    }, label: {
       LibraryItemCard(item: LibraryItemData.make(from: item), viewer: dataService.currentViewer)
-      PresentationLink(
+    })
-        transition: PresentationLinkTransition.slide(
-          options: PresentationLinkTransition.SlideTransitionOptions(edge: .trailing,
-                                                                     options:
-                                                                     PresentationLinkTransition.Options(
-                                                                       modalPresentationCapturesStatusBarAppearance: true
-                                                                     ))),
-        destination: {
-          LinkItemDetailView(
-            linkedItemObjectID: item.objectID,
-            isPDF: item.isPDF
-          )
-        }, label: {
-          EmptyView()
-        }
-      )
-    }
   }
 }
 

apple/OmnivoreKit/Sources/App/Views/Home/HomeFeedViewIOS.swift

@@ -461,6 +461,15 @@ struct AnimatingCellHeight: AnimatableModifier {
     @ObservedObject var viewModel: HomeFeedViewModel
 
     let showFeatureCards: Bool
+    var slideTransition: PresentationLinkTransition {
+      PresentationLinkTransition.slide(
+        options: PresentationLinkTransition.SlideTransitionOptions(edge: .trailing,
+                                                                   options:
+                                                                    PresentationLinkTransition.Options(
+                                                                      modalPresentationCapturesStatusBarAppearance: true
+                                                                    )
+                                                                  ))
+    }
 
     var body: some View {
       VStack(spacing: 0) {
@@ -481,6 +490,16 @@ struct AnimatingCellHeight: AnimatableModifier {
             }
           )
         }
+        PresentationLink(transition: slideTransition, isPresented: $viewModel.linkIsActive) {
+          if let presentingItem = viewModel.selectedItem {
+            WebReaderContainerView(item: presentingItem)
+          } else {
+            EmptyView()
+          }
+        } label: {
+          EmptyView()
+        }.buttonStyle(.plain)
+
         if prefersListLayout || !enableGrid {
           HomeFeedListView(
             listTitle: $listTitle,

apple/OmnivoreKit/Sources/App/Views/Home/HomeFeedViewModel.swift

@@ -13,7 +13,7 @@ enum LoadingBarStyle {
 
 @MainActor final class HomeFeedViewModel: NSObject, ObservableObject {
   let filterKey: String
-  @ObservedObject var fetcher: LibraryItemFetcher
+  @Published var fetcher: LibraryItemFetcher
   let folderConfigs: [String: LibraryListConfig]
 
   @Published var isLoading = false
@@ -67,6 +67,13 @@ enum LoadingBarStyle {
     super.init()
   }
 
+  func presentItem(item: Models.LibraryItem) {
+    withAnimation {
+      self.selectedItem = item
+      self.linkIsActive = true
+    }
+  }
+  
   private var filterState: FetcherFilterState? {
     if let appliedFilter = appliedFilter {
       return FetcherFilterState(
@@ -307,7 +314,7 @@ enum LoadingBarStyle {
     Task {
       do {
         try await dataService.moveItem(itemID: item.unwrappedID, folder: folder)
-        snackbar("Item moved")
+        snackbar("Moved to library")
       } catch {
         snackbar("Error moving item to \(folder)")
       }

apple/OmnivoreKit/Sources/App/Views/LibraryTabView.swift

@@ -137,18 +137,6 @@ struct LibraryTabView: View {
       )
     }
     .navigationBarHidden(true)
-    .onReceive(NSNotification.snackBarPublisher) { notification in
-      if let message = notification.userInfo?["message"] as? String {
-        showOperationToast = true
-        operationMessage = message
-        operationStatus = .isPerforming
-        if let dismissAfter = notification.userInfo?["dismissAfter"] as? Int {
-          DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(dismissAfter)) {
-            showOperationToast = false
-          }
-        }
-      }
-    }
     .onReceive(NSNotification.performSyncPublisher) { _ in
       Task {
         await syncManager.syncUpdates(dataService: dataService)

apple/OmnivoreKit/Sources/App/Views/LinkItemDetailView.swift

@@ -71,7 +71,7 @@ struct LinkItemDetailView: View {
         }
         .navigationViewStyle(.stack)
       } else if let item = viewModel.item {
-        WebReaderContainerView(item: item, pop: { dismiss() })
+        WebReaderContainerView(item: item)
           .background(ThemeManager.currentBgColor)
       }
     }

apple/OmnivoreKit/Sources/App/Views/PrimaryContentView.swift

@@ -2,12 +2,39 @@ import Models
 import Services
 import SwiftUI
 import Views
+import Transmission
 
 @MainActor public struct PrimaryContentView: View {
-  @State var searchTerm: String = ""
+  @State var showSnackbar = false
+  @State var snackbarMessage: String?
+  @State var snackbarUndoAction: (() -> Void)?
+
+  @State private var snackbarTimer: Timer?
 
   public var body: some View {
-    innerBody
+    ZStack {
+      WindowLink(level: .alert, transition: .move(edge: .bottom), isPresented: $showSnackbar) {
+        InformationalSnackbar(message: snackbarMessage, undoAction: snackbarUndoAction)
+      } label: {
+        EmptyView()
+      }.buttonStyle(.plain)
+
+      innerBody
+    }
+      .onReceive(NSNotification.snackBarPublisher) { notification in
+        if let message = notification.userInfo?["message"] as? String {
+          snackbarUndoAction = notification.userInfo?["undoAction"] as? (() -> Void)
+          snackbarMessage = message
+          showSnackbar = true
+
+          let dismissAfter = notification.userInfo?["dismissAfter"] as? Int ?? 2000
+          if snackbarTimer == nil {
+            startTimer(amount: dismissAfter)
+          } else {
+            increaseTimeout(amount: dismissAfter)
+          }
+        }
+      }
   }
 
   public var innerBody: some View {
@@ -25,4 +52,21 @@ import Views
       return AnyView(splitView)
     #endif
   }
+  
+  func startTimer(amount: Int) {
+    self.snackbarTimer = Timer.scheduledTimer(withTimeInterval: TimeInterval(amount / 1000), repeats: false) { _ in
+      DispatchQueue.main.async {
+        self.showSnackbar = false
+      }
+    }
+  }
+
+  func stopTimer() {
+    snackbarTimer?.invalidate()
+  }
+
+  func increaseTimeout(amount: Int) {
+    stopTimer()
+    startTimer(amount: amount)
+  }
 }

apple/OmnivoreKit/Sources/App/Views/WebReader/WebReaderContainer.swift

@@ -9,8 +9,8 @@ import WebKit
 
 // swiftlint:disable file_length type_body_length
 struct WebReaderContainerView: View {
-  let item: Models.LibraryItem
+  @State var item: Models.LibraryItem
-  let pop: () -> Void
+  @Environment(\.dismiss) private var dismiss
 
   @State private var showPreferencesPopover = false
   @State private var showPreferencesFormsheet = false
@@ -44,7 +44,6 @@ struct WebReaderContainerView: View {
   @EnvironmentObject var audioController: AudioController
   @Environment(\.openURL) var openURL
   @StateObject var viewModel = WebReaderViewModel()
-  @Environment(\.dismiss) var dismiss
 
   @AppStorage(UserDefaultKey.prefersHideStatusBarInReader.rawValue) var prefersHideStatusBarInReader = false
 
@@ -252,7 +251,7 @@ struct WebReaderContainerView: View {
       #if os(iOS)
         Button(
           action: {
-            pop()
+            dismiss()
           },
           label: {
             Image.chevronRight
@@ -492,13 +491,6 @@ struct WebReaderContainerView: View {
             }
           }
         }
-        .sheet(isPresented: $showLabelsModal) {
-          ApplyLabelsView(mode: .item(item), onSave: { labels in
-            showLabelsModal = false
-            item.labels = NSSet(array: labels)
-            readerSettingsChangedTransactionID = UUID()
-          })
-        }
         .sheet(isPresented: $showTitleEdit) {
           LinkedItemMetadataEditView(item: item, onSave: { title, _ in
             item.title = title
@@ -506,6 +498,13 @@ struct WebReaderContainerView: View {
             readerSettingsChangedTransactionID = UUID()
           })
         }
+        .sheet(isPresented: $showLabelsModal) {
+          ApplyLabelsView(mode: .item(item), onSave: { labels in
+            showLabelsModal = false
+            item.labels = NSSet(array: labels)
+            readerSettingsChangedTransactionID = UUID()
+          })
+        }
         #if os(iOS)
           .sheet(isPresented: $showNotebookView, onDismiss: onNotebookViewDismissal) {
             NotebookView(
@@ -616,26 +615,18 @@ struct WebReaderContainerView: View {
       WebViewManager.shared().loadHTMLString(WebReaderContent.emptyContent(isDark: Color.isDarkMode), baseURL: nil)
     }
     .onReceive(NotificationCenter.default.publisher(for: Notification.Name("PopToRoot"))) { _ in
-      pop()
+      dismiss()
     }
     .ignoresSafeArea(.all, edges: .bottom)
   }
 
   func moveToInbox() {
     Task {
-      viewModel.showOperationToast = true
-      viewModel.operationMessage = "Moving to library..."
-      viewModel.operationStatus = .isPerforming
       do {
         try await dataService.moveItem(itemID: item.unwrappedID, folder: "inbox")
-        viewModel.operationMessage = "Moved to library"
+        Snackbar.show(message: "Moved to library", dismissAfter: 2000)
-        viewModel.operationStatus = .success
-        DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(1500)) {
-          viewModel.showOperationToast = false
-        }
       } catch {
-        viewModel.operationMessage = "Error moving"
+        Snackbar.show(message: "Error moving item to inbox", dismissAfter: 2000)
-        viewModel.operationStatus = .failure
       }
     }
   }
@@ -644,8 +635,12 @@ struct WebReaderContainerView: View {
     let isArchived = item.isArchived
     dataService.archiveLink(objectID: item.objectID, archived: !isArchived)
     #if os(iOS)
-      pop()
+      dismiss()
-    Snackbar.show(message: isArchived ? "Unarchived" : "Archived", dismissAfter: 2000)
+
+    Snackbar.show(message: isArchived ? "Unarchived" : "Archived", undoAction: {
+      dataService.archiveLink(objectID: item.objectID, archived: isArchived)
+      Snackbar.show(message: isArchived ? "Archived" : "Unarchived", dismissAfter: 2000)
+    }, dismissAfter: 2000)
     #endif
   }
 
@@ -673,7 +668,8 @@ struct WebReaderContainerView: View {
   }
 
   func delete() {
-    pop()
+    dismiss()
+
     #if os(iOS)
       DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(100)) {
         removeLibraryItemAction(dataService: dataService, objectID: item.objectID)