refactor(mobile): stack only through merging from timeline (#4598)

* mobile: remove stack selection page

* mobile: require at-least 2 assets to stack

* mobile: sort stack children by fileCreatedAt

---------

Co-authored-by: shalong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/modules/asset_viewer/providers/asset_stack.provider.dart

@@ -46,5 +46,6 @@ final assetStackProvider =
       .isArchivedEqualTo(false)
       .isTrashedEqualTo(false)
       .stackParentIdEqualTo(asset.remoteId)
+      .sortByFileCreatedAtDesc()
       .findAll();
 });

mobile/lib/modules/home/models/selection_state.dart

@@ -4,33 +4,38 @@ class SelectionAssetState {
   final bool hasRemote;
   final bool hasLocal;
   final bool hasMerged;
+  final int selectedCount;
 
   const SelectionAssetState({
     this.hasRemote = false,
     this.hasLocal = false,
     this.hasMerged = false,
+    this.selectedCount = 0,
   });
 
   SelectionAssetState copyWith({
     bool? hasRemote,
     bool? hasLocal,
     bool? hasMerged,
+    int? selectedCount,
   }) {
     return SelectionAssetState(
       hasRemote: hasRemote ?? this.hasRemote,
       hasLocal: hasLocal ?? this.hasLocal,
       hasMerged: hasMerged ?? this.hasMerged,
+      selectedCount: selectedCount ?? this.selectedCount,
     );
   }
 
   SelectionAssetState.fromSelection(Set<Asset> selection)
       : hasLocal = selection.any((e) => e.storage == AssetState.local),
         hasMerged = selection.any((e) => e.storage == AssetState.merged),
-        hasRemote = selection.any((e) => e.storage == AssetState.remote);
+        hasRemote = selection.any((e) => e.storage == AssetState.remote),
+        selectedCount = selection.length;
 
   @override
   String toString() =>
-      'SelectionAssetState(hasRemote: $hasRemote, hasMerged: $hasMerged, hasMerged: $hasMerged)';
+      'SelectionAssetState(hasRemote: $hasRemote, hasMerged: $hasMerged, hasMerged: $hasMerged, selectedCount: $selectedCount)';
 
   @override
   bool operator ==(covariant SelectionAssetState other) {
@@ -38,10 +43,14 @@ class SelectionAssetState {
 
     return other.hasRemote == hasRemote &&
         other.hasLocal == hasLocal &&
-        other.hasMerged == hasMerged;
+        other.hasMerged == hasMerged &&
+        other.selectedCount == selectedCount;
   }
 
   @override
   int get hashCode =>
-      hasRemote.hashCode ^ hasLocal.hashCode ^ hasMerged.hashCode;
+      hasRemote.hashCode ^
+      hasLocal.hashCode ^
+      hasMerged.hashCode ^
+      selectedCount.hashCode;
 }

mobile/lib/modules/home/ui/control_bottom_app_bar.dart

@@ -94,7 +94,7 @@ class ControlBottomAppBar extends ConsumerWidget {
                 }
               : null,
         ),
-        if (!hasLocal)
+        if (!hasLocal && selectionAssetState.selectedCount > 1)
           ControlBoxButton(
             iconData: Icons.filter_none_rounded,
             label: "control_bottom_app_bar_stack".tr(),

mobile/lib/modules/home/views/home_page.dart

@@ -7,12 +7,10 @@ import 'package:flutter/material.dart';
 import 'package:flutter_hooks/flutter_hooks.dart';
 import 'package:fluttertoast/fluttertoast.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
-import 'package:immich_mobile/modules/album/models/asset_selection_page_result.model.dart';
 import 'package:immich_mobile/modules/album/providers/album.provider.dart';
 import 'package:immich_mobile/modules/album/providers/album_detail.provider.dart';
 import 'package:immich_mobile/modules/album/providers/shared_album.provider.dart';
 import 'package:immich_mobile/modules/album/services/album.service.dart';
-import 'package:immich_mobile/modules/asset_viewer/providers/asset_stack.provider.dart';
 import 'package:immich_mobile/modules/asset_viewer/services/asset_stack.service.dart';
 import 'package:immich_mobile/modules/backup/providers/manual_upload.provider.dart';
 import 'package:immich_mobile/modules/home/models/selection_state.dart';
@@ -259,46 +257,15 @@ class HomePage extends HookConsumerWidget {
       void onStack() async {
         try {
           processing.value = true;
-          if (!selectionEnabledHook.value) {
+          if (!selectionEnabledHook.value || selection.value.length < 2) {
             return;
           }
-
-          final selectedAsset = selection.value.elementAt(0);
-
-          if (selection.value.length == 1) {
-            final stackChildren =
-                (await ref.read(assetStackProvider(selectedAsset).future))
-                    .toSet();
-            AssetSelectionPageResult? returnPayload =
-                await AutoRouter.of(context).push<AssetSelectionPageResult?>(
-              AssetSelectionRoute(
-                existingAssets: stackChildren,
-                canDeselect: true,
-                query: getAssetStackSelectionQuery(ref, selectedAsset),
-              ),
-            );
-
-            if (returnPayload != null) {
-              Set<Asset> selectedAssets = returnPayload.selectedAssets;
-              // Do not add itself as its stack child
-              selectedAssets.remove(selectedAsset);
-              final removedChildren = stackChildren.difference(selectedAssets);
-              final addedChildren = selectedAssets.difference(stackChildren);
-              await ref.read(assetStackServiceProvider).updateStack(
-                    selectedAsset,
-                    childrenToAdd: addedChildren.toList(),
-                    childrenToRemove: removedChildren.toList(),
-                  );
-            }
-          } else {
-            // Merge assets
-            selection.value.remove(selectedAsset);
-            final selectedAssets = selection.value;
-            await ref.read(assetStackServiceProvider).updateStack(
-                  selectedAsset,
-                  childrenToAdd: selectedAssets.toList(),
-                );
-          }
+          final parent = selection.value.elementAt(0);
+          selection.value.remove(parent);
+          await ref.read(assetStackServiceProvider).updateStack(
+                parent,
+                childrenToAdd: selection.value.toList(),
+              );
         } finally {
           processing.value = false;
           selectionEnabledHook.value = false;

mobile/lib/shared/providers/asset.provider.dart

@@ -245,31 +245,3 @@ QueryBuilder<Asset, Asset, QAfterSortBy>? getRemoteAssetQuery(WidgetRef ref) {
       .stackParentIdIsNull()
       .sortByFileCreatedAtDesc();
 }
-
-QueryBuilder<Asset, Asset, QAfterSortBy>? getAssetStackSelectionQuery(
-  WidgetRef ref,
-  Asset parentAsset,
-) {
-  final userId = ref.watch(currentUserProvider)?.isarId;
-  if (userId == null || !parentAsset.isRemote) {
-    return null;
-  }
-  return ref
-      .watch(dbProvider)
-      .assets
-      .where()
-      .remoteIdIsNotNull()
-      .filter()
-      .isArchivedEqualTo(false)
-      .ownerIdEqualTo(userId)
-      .not()
-      .remoteIdEqualTo(parentAsset.remoteId)
-      // Show existing stack children in selection page
-      .group(
-        (q) => q
-            .stackParentIdIsNull()
-            .or()
-            .stackParentIdEqualTo(parentAsset.remoteId),
-      )
-      .sortByFileCreatedAtDesc();
-}