feat: favorite action (#19623)

mobile/lib/presentation/widgets/action_buttons/favorite_action_button.widget.dart

@@ -1,16 +1,73 @@
 import 'package:flutter/material.dart';
+import 'package:fluttertoast/fluttertoast.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/constants/enums.dart';
+import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/extensions/translate_extensions.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/base_action_button.widget.dart';
+import 'package:immich_mobile/providers/infrastructure/action.provider.dart';
+import 'package:immich_mobile/providers/timeline/multiselect.provider.dart';
+import 'package:immich_mobile/providers/user.provider.dart';
+import 'package:immich_mobile/widgets/common/immich_toast.dart';
 
 class FavoriteActionButton extends ConsumerWidget {
-  const FavoriteActionButton({super.key});
+  final ActionSource source;
+
+  const FavoriteActionButton({super.key, required this.source});
+
+  onAction(BuildContext context, WidgetRef ref) {
+    switch (source) {
+      case ActionSource.timeline:
+        timelineAction(context, ref);
+      case ActionSource.viewer:
+        viewerAction(ref);
+    }
+  }
+
+  void timelineAction(BuildContext context, WidgetRef ref) {
+    final user = ref.read(currentUserProvider);
+    if (user == null) {
+      return;
+    }
+
+    final ids = ref
+        .read(multiSelectProvider.select((value) => value.selectedAssets))
+        .whereType<RemoteAsset>()
+        .where((asset) => asset.ownerId == user.id)
+        .map((asset) => asset.id)
+        .toList();
+
+    if (ids.isEmpty) {
+      return;
+    }
+
+    ref.read(actionProvider.notifier).favorite(ids);
+    ref.read(multiSelectProvider.notifier).reset();
+
+    final toastMessage = 'favorite_action_prompt'.t(
+      context: context,
+      args: {'count': ids.length.toString()},
+    );
+
+    if (context.mounted) {
+      ImmichToast.show(
+        context: context,
+        msg: toastMessage,
+        gravity: ToastGravity.BOTTOM,
+      );
+    }
+  }
+
+  void viewerAction(WidgetRef _) {
+    UnimplementedError("Viewer action for favorite is not implemented yet.");
+  }
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     return BaseActionButton(
       iconData: Icons.favorite_border_rounded,
       label: "favorite".t(context: context),
+      onPressed: () => onAction(context, ref),
     );
   }
 }

mobile/lib/presentation/widgets/bottom_app_bar/home_bottom_app_bar.widget.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/constants/enums.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/archive_action_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/delete_action_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/delete_local_action_button.widget.dart';
@@ -35,7 +36,7 @@ class HomeBottomAppBar extends ConsumerWidget {
         if (multiselect.hasRemote) ...[
           const ShareLinkActionButton(),
           const ArchiveActionButton(),
-          const FavoriteActionButton(),
+          const FavoriteActionButton(source: ActionSource.timeline),
           const DownloadActionButton(),
           isTrashEnable
               ? const TrashActionButton()

mobile/lib/presentation/widgets/images/thumbnail.widget.dart

@@ -32,7 +32,7 @@ class Thumbnail extends StatelessWidget {
       );
     }
 
-    if (asset is Asset) {
+    if (asset is RemoteAsset) {
       return RemoteThumbProvider(
         assetId: asset.id,
         height: size.height,
@@ -45,7 +45,8 @@ class Thumbnail extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final thumbHash = asset is Asset ? (asset as Asset).thumbHash : null;
+    final thumbHash =
+        asset is RemoteAsset ? (asset as RemoteAsset).thumbHash : null;
     final provider = imageProvider(asset: asset, size: size);
 
     return OctoImage.fromSet(

mobile/lib/presentation/widgets/images/thumbnail_tile.widget.dart

@@ -30,9 +30,8 @@ class ThumbnailTile extends ConsumerWidget {
         ? context.primaryColor.darken(amount: 0.6)
         : context.primaryColor.lighten(amount: 0.8);
 
-    final isSelected = ref
-        .watch(multiSelectProvider.select((state) => state.selectedAssets))
-        .contains(asset);
+    final multiselect = ref.watch(multiSelectProvider);
+    final isSelected = multiselect.selectedAssets.contains(asset);
 
     return Stack(
       children: [

mobile/lib/presentation/widgets/timeline/fixed/segment.model.dart

@@ -185,7 +185,7 @@ class FixedSegment extends Segment {
   /// and prevents duplicate keys even when assets have the same name/timestamp
   String _generateUniqueKey(BaseAsset asset, int assetIndex) {
     // Try to get the most unique identifier based on asset type
-    if (asset is Asset) {
+    if (asset is RemoteAsset) {
       // For remote/merged assets, use the remote ID which is globally unique
       return 'asset_${asset.id}';
     } else if (asset is LocalAsset) {