Channel playlists support

Shared/Views/ChannelPlaylistView.swift

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+import Siesta
+import SwiftUI
+
+struct ChannelPlaylistView: View {
+    var playlist: ChannelPlaylist
+
+    @StateObject private var store = Store<ChannelPlaylist>()
+
+    @Environment(\.dismiss) private var dismiss
+    @Environment(\.inNavigationView) private var inNavigationView
+
+    @EnvironmentObject<AccountsModel> private var accounts
+
+    var items: [ContentItem] {
+        ContentItem.array(of: store.item?.videos ?? [])
+    }
+
+    var resource: Resource? {
+        accounts.api.channelPlaylist(playlist.id)
+    }
+
+    var body: some View {
+        #if os(iOS)
+            if inNavigationView {
+                content
+            } else {
+                PlayerControlsView {
+                    content
+                }
+            }
+        #else
+            PlayerControlsView {
+                content
+            }
+        #endif
+    }
+
+    var content: some View {
+        VStack(alignment: .leading) {
+            #if os(tvOS)
+                Text(playlist.title)
+                    .font(.title2)
+                    .frame(alignment: .leading)
+            #endif
+            VerticalCells(items: items)
+        }
+        .onAppear {
+            resource?.addObserver(store)
+            resource?.loadIfNeeded()
+        }
+        #if !os(tvOS)
+            .toolbar {
+                ToolbarItem(placement: .cancellationAction) {
+                    if inNavigationView {
+                        Button("Done") {
+                            dismiss()
+                        }
+                    }
+                }
+            }
+            .navigationTitle(playlist.title)
+
+        #else
+            .background(.thickMaterial)
+        #endif
+    }
+}
+
+struct ChannelPlaylistView_Previews: PreviewProvider {
+    static var previews: some View {
+        ChannelPlaylistView(playlist: ChannelPlaylist.fixture)
+            .injectFixtureEnvironmentObjects()
+    }
+}