Managing Favorites sections

Shared/Favorites/FavoriteItemView.swift

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+import Defaults
+import Siesta
+import SwiftUI
+import UniformTypeIdentifiers
+
+final class FavoriteResourceObserver: ObservableObject, ResourceObserver {
+    @Published var videos = [Video]()
+
+    func resourceChanged(_ resource: Resource, event _: ResourceEvent) {
+        if let videos: [Video] = resource.typedContent() {
+            self.videos = videos
+        } else if let channel: Channel = resource.typedContent() {
+            videos = channel.videos
+        } else if let playlist: ChannelPlaylist = resource.typedContent() {
+            videos = playlist.videos
+        } else if let playlist: Playlist = resource.typedContent() {
+            videos = playlist.videos
+        }
+    }
+}
+
+struct FavoriteItemView: View {
+    let item: FavoriteItem
+    let resource: Resource?
+
+    @StateObject private var store = FavoriteResourceObserver()
+
+    @Binding private var favorites: [FavoriteItem]
+    @Binding private var dragging: FavoriteItem?
+
+    @EnvironmentObject<PlaylistsModel> private var playlistsModel
+
+    init(
+        item: FavoriteItem,
+        resource: Resource?,
+        favorites: Binding<[FavoriteItem]>,
+        dragging: Binding<FavoriteItem?>
+    ) {
+        self.item = item
+        self.resource = resource
+        _favorites = favorites
+        _dragging = dragging
+    }
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 2) {
+            Text(label)
+                .font(.title3.bold())
+                .foregroundColor(.secondary)
+
+                .contextMenu {
+                    Button {
+                        FavoritesModel.shared.remove(item)
+                    } label: {
+                        Label("Remove from Favorites", systemImage: "trash")
+                    }
+                }
+                .contentShape(Rectangle())
+            #if os(tvOS)
+                .padding(.leading, 40)
+            #else
+                .padding(.leading, 15)
+            #endif
+
+            HorizontalCells(items: store.videos.map { ContentItem(video: $0) })
+        }
+
+        .contentShape(Rectangle())
+        .opacity(dragging?.id == item.id ? 0.5 : 1)
+        .onAppear {
+            resource?.addObserver(store)
+            resource?.loadIfNeeded()
+        }
+        #if !os(tvOS)
+            .onDrag {
+                dragging = item
+                return NSItemProvider(object: item.id as NSString)
+            }
+            .onDrop(
+                of: [UTType.text],
+                delegate: DropFavorite(item: item, favorites: $favorites, current: $dragging)
+            )
+        #endif
+    }
+
+    var label: String {
+        if case let .playlist(id) = item.section {
+            return playlistsModel.find(id: id)?.title ?? "Unknown Playlist"
+        }
+
+        return item.section.label
+    }
+}