Source Code added

mobile/lib/pages/album/album_asset_selection.page.dart

@@ -0,0 +1,74 @@
+import 'package:auto_route/auto_route.dart';
+import 'package:easy_localization/easy_localization.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/entities/asset.entity.dart';
+import 'package:immich_mobile/extensions/asyncvalue_extensions.dart';
+import 'package:immich_mobile/extensions/build_context_extensions.dart';
+import 'package:immich_mobile/models/albums/asset_selection_page_result.model.dart';
+import 'package:immich_mobile/providers/timeline.provider.dart';
+import 'package:immich_mobile/widgets/asset_grid/asset_grid_data_structure.dart';
+import 'package:immich_mobile/widgets/asset_grid/immich_asset_grid.dart';
+
+@RoutePage()
+class AlbumAssetSelectionPage extends HookConsumerWidget {
+  const AlbumAssetSelectionPage({super.key, required this.existingAssets, this.canDeselect = false});
+
+  final Set<Asset> existingAssets;
+  final bool canDeselect;
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final assetSelectionRenderList = ref.watch(assetSelectionTimelineProvider);
+    final selected = useState<Set<Asset>>(existingAssets);
+    final selectionEnabledHook = useState(true);
+
+    Widget buildBody(RenderList renderList) {
+      return ImmichAssetGrid(
+        renderList: renderList,
+        listener: (active, assets) {
+          selectionEnabledHook.value = active;
+          selected.value = assets;
+        },
+        selectionActive: true,
+        preselectedAssets: existingAssets,
+        canDeselect: canDeselect,
+        showMultiSelectIndicator: false,
+      );
+    }
+
+    return Scaffold(
+      appBar: AppBar(
+        elevation: 0,
+        leading: IconButton(
+          icon: const Icon(Icons.close_rounded),
+          onPressed: () {
+            AutoRouter.of(context).popForced(null);
+          },
+        ),
+        title: selected.value.isEmpty
+            ? const Text('add_photos', style: TextStyle(fontSize: 18)).tr()
+            : const Text(
+                'share_assets_selected',
+                style: TextStyle(fontSize: 18),
+              ).tr(namedArgs: {'count': selected.value.length.toString()}),
+        centerTitle: false,
+        actions: [
+          if (selected.value.isNotEmpty || canDeselect)
+            TextButton(
+              onPressed: () {
+                var payload = AssetSelectionPageResult(selectedAssets: selected.value);
+                AutoRouter.of(context).popForced<AssetSelectionPageResult>(payload);
+              },
+              child: Text(
+                canDeselect ? "done" : "add",
+                style: TextStyle(fontWeight: FontWeight.bold, color: context.primaryColor),
+              ).tr(),
+            ),
+        ],
+      ),
+      body: assetSelectionRenderList.widgetWhen(onData: (data) => buildBody(data)),
+    );
+  }
+}