local sync poc

2026-05-18 03:10:24 +03:00 · 2025-11-21 00:50:24 -05:00
parent c70146c4a8
commit 8fe932d891
7 changed files with 626 additions and 898 deletions
@@ -0,0 +1,53 @@
+import Photos
+
+protocol PhotoLibraryProvider {
+  var isAuthorized: Bool { get }
+  @available(iOS 16, *)
+  var currentChangeToken: PHPersistentChangeToken { get }
+  
+  func fetchAlbums(sorted: Bool) -> [PHAssetCollection]
+  func fetchAlbums(with type: PHAssetCollectionType, subtype: PHAssetCollectionSubtype, options: PHFetchOptions?) -> PHFetchResult<PHAssetCollection>
+  func fetchAssets(in album: PHAssetCollection, options: PHFetchOptions?) -> PHFetchResult<PHAsset>
+  func fetchAssets(withIdentifiers ids: [String], options: PHFetchOptions?) -> PHFetchResult<PHAsset>
+  @available(iOS 16, *)
+  func fetchPersistentChanges(since token: PHPersistentChangeToken) throws -> PHPersistentChangeFetchResult
+}
+
+struct PhotoLibrary: PhotoLibraryProvider {
+  static let shared: PhotoLibrary = .init()
+
+  private init() {}
+  
+  func fetchAlbums(with type: PHAssetCollectionType, subtype: PHAssetCollectionSubtype, options: PHFetchOptions?) -> PHFetchResult<PHAssetCollection> {
+    PHAssetCollection.fetchAssetCollections(with: type, subtype: subtype, options: options)
+  }
+
+  func fetchAssetCollection(albumId: String, options: PHFetchOptions? = nil) -> PHAssetCollection? {
+    let albums = PHAssetCollection.fetchAssetCollections(withLocalIdentifiers: [albumId], options: options)
+    return albums.firstObject
+  }
+
+  func fetchAssets(in album: PHAssetCollection, options: PHFetchOptions?) -> PHFetchResult<PHAsset> {
+    album.assetCollectionSubtype == .smartAlbumUserLibrary
+      ? PHAsset.fetchAssets(with: options)
+      : PHAsset.fetchAssets(in: album, options: options)
+  }
+
+  func fetchAssets(withIdentifiers ids: [String], options: PHFetchOptions?) -> PHFetchResult<PHAsset> {
+    PHAsset.fetchAssets(withLocalIdentifiers: ids, options: options)
+  }
+  
+  @available(iOS 16, *)
+  func fetchPersistentChanges(since token: PHPersistentChangeToken) throws -> PHPersistentChangeFetchResult {
+    try PHPhotoLibrary.shared().fetchPersistentChanges(since: token)
+  }
+  
+  @available(iOS 16, *)
+  var currentChangeToken: PHPersistentChangeToken {
+    PHPhotoLibrary.shared().currentChangeToken
+  }
+  
+  var isAuthorized: Bool {
+    PHPhotoLibrary.authorizationStatus(for: .readWrite) == .authorized
+  }
+}