Yattee v2 rewrite

Yattee/Data/DataManagerNotifications.swift

@@ -0,0 +1,47 @@
+//
+//  DataManagerNotifications.swift
+//  Yattee
+//
+//  Notification definitions for data changes.
+//
+
+import Foundation
+
+// MARK: - Notification Names
+
+extension Notification.Name {
+    /// Posted when subscriptions are modified (subscribe or unsubscribe).
+    static let subscriptionsDidChange = Notification.Name("subscriptionsDidChange")
+    /// Posted when bookmarks are modified (add or remove).
+    static let bookmarksDidChange = Notification.Name("bookmarksDidChange")
+    /// Posted when watch history is modified (add, update, or remove).
+    static let watchHistoryDidChange = Notification.Name("watchHistoryDidChange")
+    /// Posted when playlists are modified (create, update, or delete).
+    static let playlistsDidChange = Notification.Name("playlistsDidChange")
+    /// Posted when media sources are modified (add, update, or delete).
+    static let mediaSourcesDidChange = Notification.Name("mediaSourcesDidChange")
+    /// Posted when search history is modified (add or delete).
+    static let searchHistoryDidChange = Notification.Name("searchHistoryDidChange")
+    /// Posted when recent channels are modified (add or delete).
+    static let recentChannelsDidChange = Notification.Name("recentChannelsDidChange")
+    /// Posted when recent playlists are modified (add or delete).
+    static let recentPlaylistsDidChange = Notification.Name("recentPlaylistsDidChange")
+    /// Posted when video details (likes, views, etc.) are loaded or updated.
+    static let videoDetailsDidLoad = Notification.Name("videoDetailsDidLoad")
+    /// Posted when sidebar settings (max channels, sort order, etc.) are modified.
+    static let sidebarSettingsDidChange = Notification.Name("sidebarSettingsDidChange")
+}
+
+// MARK: - Subscription Change
+
+/// Describes what changed in subscriptions for incremental feed updates.
+struct SubscriptionChange {
+    let addedSubscriptions: [Subscription]
+    let removedChannelIDs: [String]
+
+    static let userInfoKey = "subscriptionChange"
+
+    var isEmpty: Bool {
+        addedSubscriptions.isEmpty && removedChannelIDs.isEmpty
+    }
+}