Fix video context menu channel subscription button (fixes #41)

Model/PlaylistsModel.swift

@@ -28,7 +28,7 @@ final class PlaylistsModel: ObservableObject {
     }
 
     func load(force: Bool = false, onSuccess: @escaping () -> Void = {}) {
-        guard !resource.isNil else {
+        guard accounts.app.supportsUserPlaylists, accounts.signedIn else {
             playlists = []
             return
         }

Model/SubscriptionsModel.swift

@@ -35,9 +35,11 @@ final class SubscriptionsModel: ObservableObject {
     }
 
     func load(force: Bool = false, onSuccess: @escaping () -> Void = {}) {
-        guard accounts.app.supportsSubscriptions else {
+        guard accounts.app.supportsSubscriptions, accounts.signedIn else {
+            channels = []
             return
         }
+
         let request = force ? resource?.load() : resource?.loadIfNeeded()
 
         request?

Shared/EnvironmentValues.swift

@@ -9,6 +9,10 @@ private struct InChannelViewKey: EnvironmentKey {
     static let defaultValue = false
 }
 
+private struct InChannelPlaylistViewKey: EnvironmentKey {
+    static let defaultValue = false
+}
+
 private struct HorizontalCellsKey: EnvironmentKey {
     static let defaultValue = false
 }
@@ -36,6 +40,11 @@ extension EnvironmentValues {
         set { self[InChannelViewKey.self] = newValue }
     }
 
+    var inChannelPlaylistView: Bool {
+        get { self[InChannelPlaylistViewKey.self] }
+        set { self[InChannelPlaylistViewKey.self] = newValue }
+    }
+
     var horizontalCells: Bool {
         get { self[HorizontalCellsKey.self] }
         set { self[HorizontalCellsKey.self] = newValue }

Shared/Navigation/ContentView.swift

@@ -39,6 +39,10 @@ struct ContentView: View {
             #endif
         }
         .onAppear(perform: configure)
+        .onChange(of: accounts.signedIn) { _ in
+            subscriptions.load(force: true)
+            playlists.load(force: true)
+        }
 
         .environmentObject(accounts)
         .environmentObject(comments)
@@ -83,6 +87,17 @@ struct ContentView: View {
             }
         )
         #endif
+        .alert(isPresented: $navigation.presentingUnsubscribeAlert) {
+            Alert(
+                title: Text(
+                    "Are you sure you want to unsubscribe from \(navigation.channelToUnsubscribe.name)?"
+                ),
+                primaryButton: .destructive(Text("Unsubscribe")) {
+                    subscriptions.unsubscribe(navigation.channelToUnsubscribe.id)
+                },
+                secondaryButton: .cancel()
+            )
+        }
     }
 
     func configure() {
@@ -135,6 +150,9 @@ struct ContentView: View {
         #endif
 
         navigation.tabSelection = section ?? .search
+
+        subscriptions.load()
+        playlists.load()
     }
 
     func openWelcomeScreenIfAccountEmpty() {

Shared/Navigation/Sidebar.swift

@@ -29,14 +29,6 @@ struct Sidebar: View {
                     }
                 }
             }
-            .onAppear {
-                subscriptions.load()
-                playlists.load()
-            }
-            .onChange(of: accounts.signedIn) { _ in
-                subscriptions.load(force: true)
-                playlists.load(force: true)
-            }
             .onChange(of: navigation.sidebarSectionChanged) { _ in
                 scrollScrollViewToItem(scrollView: scrollView, for: navigation.tabSelection)
             }

Shared/Views/ChannelPlaylistView.swift

@@ -57,6 +57,7 @@ struct ChannelPlaylistView: View {
                 }
             #endif
             VerticalCells(items: items)
+                .environment(\.inChannelPlaylistView, true)
         }
         #if os(iOS)
         .sheet(isPresented: $presentingShareSheet) {

Shared/Views/ChannelVideosView.swift

@@ -67,18 +67,12 @@ struct ChannelVideosView: View {
                 .frame(maxWidth: .infinity)
             #endif
 
-            #if os(iOS)
-                VerticalCells(items: videos)
-            #else
-                if #available(macOS 12.0, *) {
             VerticalCells(items: videos)
+                .environment(\.inChannelView, true)
+            #if os(tvOS)
                 .prefersDefaultFocus(in: focusNamespace)
-                } else {
-                    VerticalCells(items: videos)
-                }
             #endif
         }
-        .environment(\.inChannelView, true)
 
         #if !os(tvOS)
         .toolbar {
@@ -164,17 +158,6 @@ struct ChannelVideosView: View {
                 }
             }
         }
-        .alert(isPresented: $navigation.presentingUnsubscribeAlert) {
-            Alert(
-                title: Text(
-                    "Are you sure you want to unsubscribe from \(channel.name)?"
-                ),
-                primaryButton: .destructive(Text("Unsubscribe")) {
-                    subscriptions.unsubscribe(channel.id)
-                },
-                secondaryButton: .cancel()
-            )
-        }
     }
 
     private var contentItem: ContentItem {

Shared/Views/VideoContextMenuView.swift

@@ -8,6 +8,7 @@ struct VideoContextMenuView: View {
 
     @Environment(\.inNavigationView) private var inNavigationView
     @Environment(\.inChannelView) private var inChannelView
+    @Environment(\.inChannelPlaylistView) private var inChannelPlaylistView
     @Environment(\.navigationStyle) private var navigationStyle
     @Environment(\.currentPlaylistID) private var playlistID
 
@@ -28,11 +29,11 @@ struct VideoContextMenuView: View {
             addToQueueButton
         }
 
-        if !inChannelView {
+        if !inChannelView, !inChannelPlaylistView {
             Section {
                 openChannelButton
 
-                if accounts.app.supportsSubscriptions {
+                if accounts.app.supportsSubscriptions, accounts.api.signedIn {
                     subscriptionButton
                 }
             }