feat: manual stack assets (#4198)

mobile/lib/modules/asset_viewer/services/asset_stack.service.dart

@@ -0,0 +1,72 @@
+import 'package:flutter/material.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/shared/models/asset.dart';
+import 'package:immich_mobile/shared/providers/api.provider.dart';
+import 'package:immich_mobile/shared/services/api.service.dart';
+import 'package:openapi/api.dart';
+
+class AssetStackService {
+  AssetStackService(this._api);
+
+  final ApiService _api;
+
+  updateStack(
+    Asset parentAsset, {
+    List<Asset>? childrenToAdd,
+    List<Asset>? childrenToRemove,
+  }) async {
+    // Guard [local asset]
+    if (parentAsset.remoteId == null) {
+      return;
+    }
+
+    try {
+      if (childrenToAdd != null) {
+        final toAdd = childrenToAdd
+            .where((e) => e.isRemote)
+            .map((e) => e.remoteId!)
+            .toList();
+
+        await _api.assetApi.updateAssets(
+          AssetBulkUpdateDto(ids: toAdd, stackParentId: parentAsset.remoteId),
+        );
+      }
+
+      if (childrenToRemove != null) {
+        final toRemove = childrenToRemove
+            .where((e) => e.isRemote)
+            .map((e) => e.remoteId!)
+            .toList();
+        await _api.assetApi.updateAssets(
+          AssetBulkUpdateDto(ids: toRemove, removeParent: true),
+        );
+      }
+    } catch (error) {
+      debugPrint("Error while updating stack children: ${error.toString()}");
+    }
+  }
+
+  updateStackParent(Asset oldParent, Asset newParent) async {
+    // Guard [local asset]
+    if (oldParent.remoteId == null || newParent.remoteId == null) {
+      return;
+    }
+
+    try {
+      await _api.assetApi.updateStackParent(
+        UpdateStackParentDto(
+          oldParentId: oldParent.remoteId!,
+          newParentId: newParent.remoteId!,
+        ),
+      );
+    } catch (error) {
+      debugPrint("Error while updating stack parent: ${error.toString()}");
+    }
+  }
+}
+
+final assetStackServiceProvider = Provider(
+  (ref) => AssetStackService(
+    ref.watch(apiServiceProvider),
+  ),
+);