Source Code added

mobile/lib/domain/models/asset/base_asset.model.dart

@@ -0,0 +1,109 @@
+part 'local_asset.model.dart';
+part 'remote_asset.model.dart';
+
+enum AssetType {
+  // do not change this order!
+  other,
+  image,
+  video,
+  audio,
+}
+
+enum AssetState { local, remote, merged }
+
+sealed class BaseAsset {
+  final String name;
+  final String? checksum;
+  final AssetType type;
+  final DateTime createdAt;
+  final DateTime updatedAt;
+  final int? width;
+  final int? height;
+  final int? durationInSeconds;
+  final bool isFavorite;
+  final String? livePhotoVideoId;
+  final bool isEdited;
+
+  const BaseAsset({
+    required this.name,
+    required this.checksum,
+    required this.type,
+    required this.createdAt,
+    required this.updatedAt,
+    this.width,
+    this.height,
+    this.durationInSeconds,
+    this.isFavorite = false,
+    this.livePhotoVideoId,
+    required this.isEdited,
+  });
+
+  bool get isImage => type == AssetType.image;
+  bool get isVideo => type == AssetType.video;
+
+  bool get isMotionPhoto => livePhotoVideoId != null;
+
+  Duration get duration {
+    final durationInSeconds = this.durationInSeconds;
+    if (durationInSeconds != null) {
+      return Duration(seconds: durationInSeconds);
+    }
+    return const Duration();
+  }
+
+  bool get hasRemote => storage == AssetState.remote || storage == AssetState.merged;
+  bool get hasLocal => storage == AssetState.local || storage == AssetState.merged;
+  bool get isLocalOnly => storage == AssetState.local;
+  bool get isRemoteOnly => storage == AssetState.remote;
+
+  // Overridden in subclasses
+  AssetState get storage;
+  String? get localId;
+  String? get remoteId;
+  String get heroTag;
+
+  @override
+  String toString() {
+    return '''BaseAsset {
+  name: $name,
+  type: $type,
+  createdAt: $createdAt,
+  updatedAt: $updatedAt,
+  width: ${width ?? "<NA>"},
+  height: ${height ?? "<NA>"},
+  durationInSeconds: ${durationInSeconds ?? "<NA>"},
+  isFavorite: $isFavorite,
+  isEdited: $isEdited,
+}''';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    if (other is BaseAsset) {
+      return name == other.name &&
+          type == other.type &&
+          createdAt == other.createdAt &&
+          updatedAt == other.updatedAt &&
+          width == other.width &&
+          height == other.height &&
+          durationInSeconds == other.durationInSeconds &&
+          isFavorite == other.isFavorite &&
+          isEdited == other.isEdited;
+    }
+    return false;
+  }
+
+  @override
+  int get hashCode {
+    return name.hashCode ^
+        type.hashCode ^
+        createdAt.hashCode ^
+        updatedAt.hashCode ^
+        width.hashCode ^
+        height.hashCode ^
+        durationInSeconds.hashCode ^
+        isFavorite.hashCode ^
+        isEdited.hashCode;
+  }
+}