Source Code added

mobile/lib/presentation/widgets/asset_viewer/asset_viewer.state.dart

@@ -0,0 +1,115 @@
+import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
+import 'package:immich_mobile/providers/asset_viewer/video_player_controls_provider.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+class AssetViewerState {
+  final int backgroundOpacity;
+  final bool showingBottomSheet;
+  final bool showingControls;
+  final BaseAsset? currentAsset;
+  final int stackIndex;
+
+  const AssetViewerState({
+    this.backgroundOpacity = 255,
+    this.showingBottomSheet = false,
+    this.showingControls = true,
+    this.currentAsset,
+    this.stackIndex = 0,
+  });
+
+  AssetViewerState copyWith({
+    int? backgroundOpacity,
+    bool? showingBottomSheet,
+    bool? showingControls,
+    BaseAsset? currentAsset,
+    int? stackIndex,
+  }) {
+    return AssetViewerState(
+      backgroundOpacity: backgroundOpacity ?? this.backgroundOpacity,
+      showingBottomSheet: showingBottomSheet ?? this.showingBottomSheet,
+      showingControls: showingControls ?? this.showingControls,
+      currentAsset: currentAsset ?? this.currentAsset,
+      stackIndex: stackIndex ?? this.stackIndex,
+    );
+  }
+
+  @override
+  String toString() {
+    return 'AssetViewerState(opacity: $backgroundOpacity, bottomSheet: $showingBottomSheet, controls: $showingControls)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    if (other.runtimeType != runtimeType) return false;
+    return other is AssetViewerState &&
+        other.backgroundOpacity == backgroundOpacity &&
+        other.showingBottomSheet == showingBottomSheet &&
+        other.showingControls == showingControls &&
+        other.currentAsset == currentAsset &&
+        other.stackIndex == stackIndex;
+  }
+
+  @override
+  int get hashCode =>
+      backgroundOpacity.hashCode ^
+      showingBottomSheet.hashCode ^
+      showingControls.hashCode ^
+      currentAsset.hashCode ^
+      stackIndex.hashCode;
+}
+
+class AssetViewerStateNotifier extends Notifier<AssetViewerState> {
+  @override
+  AssetViewerState build() {
+    return const AssetViewerState();
+  }
+
+  void reset() {
+    state = const AssetViewerState();
+  }
+
+  void setAsset(BaseAsset? asset) {
+    if (asset == state.currentAsset) {
+      return;
+    }
+    state = state.copyWith(currentAsset: asset, stackIndex: 0);
+  }
+
+  void setOpacity(int opacity) {
+    if (opacity == state.backgroundOpacity) {
+      return;
+    }
+    state = state.copyWith(backgroundOpacity: opacity, showingControls: opacity == 255 ? true : state.showingControls);
+  }
+
+  void setBottomSheet(bool showing) {
+    if (showing == state.showingBottomSheet) {
+      return;
+    }
+    state = state.copyWith(showingBottomSheet: showing, showingControls: showing ? true : state.showingControls);
+    if (showing) {
+      ref.read(videoPlayerControlsProvider.notifier).pause();
+    }
+  }
+
+  void setControls(bool isShowing) {
+    if (isShowing == state.showingControls) {
+      return;
+    }
+    state = state.copyWith(showingControls: isShowing);
+  }
+
+  void toggleControls() {
+    state = state.copyWith(showingControls: !state.showingControls);
+  }
+
+  void setStackIndex(int index) {
+    if (index == state.stackIndex) {
+      return;
+    }
+    state = state.copyWith(stackIndex: index);
+  }
+}
+
+final assetViewerProvider = NotifierProvider<AssetViewerStateNotifier, AssetViewerState>(AssetViewerStateNotifier.new);