Improve initial location when adding map to album

app/lib/widget/collection_browser.dart

@@ -22,6 +22,7 @@ import 'package:nc_photos/controller/collection_items_controller.dart';
 import 'package:nc_photos/controller/collections_controller.dart';
 import 'package:nc_photos/controller/files_controller.dart';
 import 'package:nc_photos/controller/pref_controller.dart';
+import 'package:nc_photos/db/entity_converter.dart';
 import 'package:nc_photos/di_container.dart';
 import 'package:nc_photos/download_handler.dart';
 import 'package:nc_photos/entity/collection.dart';
@@ -44,6 +45,7 @@ import 'package:nc_photos/session_storage.dart';
 import 'package:nc_photos/snack_bar_manager.dart';
 import 'package:nc_photos/stream_util.dart';
 import 'package:nc_photos/widget/album_share_outlier_browser.dart';
+import 'package:nc_photos/widget/app_bar_circular_progress_indicator.dart';
 import 'package:nc_photos/widget/app_intermediate_circular_progress_indicator.dart';
 import 'package:nc_photos/widget/collection_picker.dart';
 import 'package:nc_photos/widget/draggable_item_list.dart';
@@ -63,8 +65,11 @@ import 'package:nc_photos/widget/simple_input_dialog.dart';
 import 'package:nc_photos/widget/sliver_visualized_scale.dart';
 import 'package:nc_photos/widget/viewer.dart';
 import 'package:np_codegen/np_codegen.dart';
+import 'package:np_common/object_util.dart';
 import 'package:np_common/or_null.dart';
+import 'package:np_common/unique.dart';
 import 'package:np_datetime/np_datetime.dart';
+import 'package:np_db/np_db.dart';
 import 'package:np_gps_map/np_gps_map.dart';
 import 'package:np_ui/np_ui.dart';
 import 'package:to_string/to_string.dart';
@@ -117,6 +122,7 @@ class CollectionBrowser extends StatelessWidget {
         prefController: context.read(),
         collectionsController: accountController.collectionsController,
         filesController: accountController.filesController,
+        db: context.read(),
         collection: collection,
       ),
       child: const _WrappedCollectionBrowser(),
@@ -220,6 +226,29 @@ class _WrappedCollectionBrowserState extends State<_WrappedCollectionBrowser>
                   }
                 },
               ),
+              _BlocListenerT(
+                selector: (state) => state.placePickerRequest,
+                listener: (context, placePickerRequest) async {
+                  if (placePickerRequest.value != null) {
+                    final result =
+                        await Navigator.of(context).pushNamed<CameraPosition>(
+                      PlacePicker.routeName,
+                      arguments: PlacePickerArguments(
+                        initialPosition:
+                            placePickerRequest.value!.initialPosition,
+                        initialZoom:
+                            placePickerRequest.value!.initialPosition == null
+                                ? null
+                                : 15.5,
+                      ),
+                    );
+                    if (result == null) {
+                      return;
+                    }
+                    context.read<_Bloc>().add(_AddMapToCollection(result));
+                  }
+                },
+              ),
               _BlocListenerT<ExceptionEvent?>(
                 selector: (state) => state.error,
                 listener: (context, error) {
@@ -418,6 +447,7 @@ typedef _BlocBuilder = BlocBuilder<_Bloc, _State>;
 typedef _BlocListener = BlocListener<_Bloc, _State>;
 typedef _BlocListenerT<T> = BlocListenerT<_Bloc, _State, T>;
 typedef _BlocSelector<T> = BlocSelector<_Bloc, _State, T>;
+typedef _Emitter = Emitter<_State>;
 
 extension on BuildContext {
   _Bloc get bloc => read<_Bloc>();

app/lib/widget/collection_browser.g.dart

@@ -31,6 +31,8 @@ abstract class $_StateCopyWithWorker {
       List<CollectionItem>? editItems,
       List<_Item>? editTransformedItems,
       CollectionItemSort? editSort,
+      bool? isAddMapBusy,
+      Unique<_PlacePickerRequest?>? placePickerRequest,
       bool? isDragging,
       int? zoom,
       double? scale,
@@ -61,6 +63,8 @@ class _$_StateCopyWithWorkerImpl implements $_StateCopyWithWorker {
       dynamic editItems = copyWithNull,
       dynamic editTransformedItems = copyWithNull,
       dynamic editSort = copyWithNull,
+      dynamic isAddMapBusy,
+      dynamic placePickerRequest,
       dynamic isDragging,
       dynamic zoom,
       dynamic scale = copyWithNull,
@@ -99,6 +103,10 @@ class _$_StateCopyWithWorkerImpl implements $_StateCopyWithWorker {
         editSort: editSort == copyWithNull
             ? that.editSort
             : editSort as CollectionItemSort?,
+        isAddMapBusy: isAddMapBusy as bool? ?? that.isAddMapBusy,
+        placePickerRequest:
+            placePickerRequest as Unique<_PlacePickerRequest?>? ??
+                that.placePickerRequest,
         isDragging: isDragging as bool? ?? that.isDragging,
         zoom: zoom as int? ?? that.zoom,
         scale: scale == copyWithNull ? that.scale : scale as double?,
@@ -151,7 +159,7 @@ extension _$_BlocNpLog on _Bloc {
 extension _$_StateToString on _State {
   String _$toString() {
     // ignore: unnecessary_string_interpolations
-    return "_State {collection: $collection, coverUrl: $coverUrl, items: [length: ${items.length}], rawItems: [length: ${rawItems.length}], itemsWhitelist: ${itemsWhitelist == null ? null : "{length: ${itemsWhitelist!.length}}"}, isLoading: $isLoading, transformedItems: [length: ${transformedItems.length}], selectedItems: {length: ${selectedItems.length}}, isSelectionRemovable: $isSelectionRemovable, isSelectionManageableFile: $isSelectionManageableFile, isSelectionDeletable: $isSelectionDeletable, isEditMode: $isEditMode, isEditBusy: $isEditBusy, editName: $editName, editItems: ${editItems == null ? null : "[length: ${editItems!.length}]"}, editTransformedItems: ${editTransformedItems == null ? null : "[length: ${editTransformedItems!.length}]"}, editSort: ${editSort == null ? null : "${editSort!.name}"}, isDragging: $isDragging, zoom: $zoom, scale: ${scale == null ? null : "${scale!.toStringAsFixed(3)}"}, importResult: $importResult, error: $error, message: $message}";
+    return "_State {collection: $collection, coverUrl: $coverUrl, items: [length: ${items.length}], rawItems: [length: ${rawItems.length}], itemsWhitelist: ${itemsWhitelist == null ? null : "{length: ${itemsWhitelist!.length}}"}, isLoading: $isLoading, transformedItems: [length: ${transformedItems.length}], selectedItems: {length: ${selectedItems.length}}, isSelectionRemovable: $isSelectionRemovable, isSelectionManageableFile: $isSelectionManageableFile, isSelectionDeletable: $isSelectionDeletable, isEditMode: $isEditMode, isEditBusy: $isEditBusy, editName: $editName, editItems: ${editItems == null ? null : "[length: ${editItems!.length}]"}, editTransformedItems: ${editTransformedItems == null ? null : "[length: ${editTransformedItems!.length}]"}, editSort: ${editSort == null ? null : "${editSort!.name}"}, isAddMapBusy: $isAddMapBusy, placePickerRequest: $placePickerRequest, isDragging: $isDragging, zoom: $zoom, scale: ${scale == null ? null : "${scale!.toStringAsFixed(3)}"}, importResult: $importResult, error: $error, message: $message}";
   }
 }
 
@@ -219,6 +227,13 @@ extension _$_AddLabelToCollectionToString on _AddLabelToCollection {
   }
 }
 
+extension _$_RequestAddMapToString on _RequestAddMap {
+  String _$toString() {
+    // ignore: unnecessary_string_interpolations
+    return "_RequestAddMap {}";
+  }
+}
+
 extension _$_AddMapToCollectionToString on _AddMapToCollection {
   String _$toString() {
     // ignore: unnecessary_string_interpolations

app/lib/widget/collection_browser/app_bar.dart

@@ -365,10 +365,20 @@ class _EditAppBar extends StatelessWidget {
             onPressed: () => _onAddTextPressed(context),
           ),
         if (capabilitiesAdapter.isPermitted(CollectionCapability.mapItem))
-          IconButton(
-            icon: const Icon(Icons.map_outlined),
-            tooltip: L10n.global().albumAddMapTooltip,
-            onPressed: () => _onAddMapPressed(context),
+          _BlocSelector(
+            selector: (state) => state.isAddMapBusy,
+            builder: (context, isAddMapBusy) => isAddMapBusy
+                ? const IconButton(
+                    icon: AppBarProgressIndicator(),
+                    onPressed: null,
+                  )
+                : IconButton(
+                    icon: const Icon(Icons.map_outlined),
+                    tooltip: L10n.global().albumAddMapTooltip,
+                    onPressed: () {
+                      context.addEvent(const _RequestAddMap());
+                    },
+                  ),
           ),
         if (capabilitiesAdapter.isPermitted(CollectionCapability.sort))
           IconButton(
@@ -393,15 +403,6 @@ class _EditAppBar extends StatelessWidget {
     context.read<_Bloc>().add(_AddLabelToCollection(result));
   }
 
-  Future<void> _onAddMapPressed(BuildContext context) async {
-    final result = await Navigator.of(context)
-        .pushNamed<CameraPosition>(PlacePicker.routeName);
-    if (result == null) {
-      return;
-    }
-    context.read<_Bloc>().add(_AddMapToCollection(result));
-  }
-
   Future<void> _onSortPressed(BuildContext context) async {
     final current = context
         .read<_Bloc>()

app/lib/widget/collection_browser/bloc.dart

@@ -9,6 +9,7 @@ class _Bloc extends Bloc<_Event, _State>
     required this.prefController,
     required this.collectionsController,
     required this.filesController,
+    required this.db,
     required Collection collection,
   })  : _c = container,
         _isAdHocCollection = !collectionsController.stream.value.data
@@ -30,6 +31,7 @@ class _Bloc extends Bloc<_Event, _State>
     on<_BeginEdit>(_onBeginEdit);
     on<_EditName>(_onEditName);
     on<_AddLabelToCollection>(_onAddLabelToCollection);
+    on<_RequestAddMap>(_onRequestAddMap);
     on<_AddMapToCollection>(_onAddMapToCollection);
     on<_EditSort>(_onEditSort);
     on<_EditManualSort>(_onEditManualSort);
@@ -212,6 +214,34 @@ class _Bloc extends Bloc<_Event, _State>
     ));
   }
 
+  Future<void> _onRequestAddMap(_RequestAddMap ev, _Emitter emit) async {
+    _log.info(ev);
+    emit(state.copyWith(isAddMapBusy: true));
+    try {
+      final location = await db.getFirstLocationOfFileIds(
+        account: account.toDb(),
+        fileIds: state.transformedItems
+            .whereType<_FileItem>()
+            .map((e) => e.file.fdId)
+            .toList(),
+      );
+      final mapCoord =
+          location?.let((e) => MapCoord(e.latitude!, e.longitude!));
+      emit(state.copyWith(
+        placePickerRequest:
+            Unique(_PlacePickerRequest(initialPosition: mapCoord)),
+      ));
+    } catch (e, stackTrace) {
+      _log.severe("[_onRequestAddMap] Failed while getFirstLocationOfFileIds",
+          e, stackTrace);
+      emit(state.copyWith(
+        placePickerRequest: Unique(const _PlacePickerRequest()),
+      ));
+    } finally {
+      emit(state.copyWith(isAddMapBusy: false));
+    }
+  }
+
   void _onAddMapToCollection(_AddMapToCollection ev, Emitter<_State> emit) {
     _log.info(ev);
     assert(isCollectionCapabilityPermitted(CollectionCapability.mapItem));
@@ -597,6 +627,7 @@ class _Bloc extends Bloc<_Event, _State>
   final PrefController prefController;
   final CollectionsController collectionsController;
   final FilesController filesController;
+  final NpDb db;
   late final CollectionItemsController itemsController;
 
   /// Specify if the supplied [collection] is an "inline" one, which means it's

app/lib/widget/collection_browser/state_event.dart

@@ -21,6 +21,8 @@ class _State {
     this.editItems,
     this.editTransformedItems,
     this.editSort,
+    required this.isAddMapBusy,
+    required this.placePickerRequest,
     required this.isDragging,
     required this.zoom,
     this.scale,
@@ -47,6 +49,8 @@ class _State {
       isSelectionDeletable: true,
       isEditMode: false,
       isEditBusy: false,
+      isAddMapBusy: false,
+      placePickerRequest: Unique(null),
       isDragging: false,
       zoom: zoom,
     );
@@ -76,6 +80,8 @@ class _State {
   final List<CollectionItem>? editItems;
   final List<_Item>? editTransformedItems;
   final CollectionItemSort? editSort;
+  final bool isAddMapBusy;
+  final Unique<_PlacePickerRequest?> placePickerRequest;
 
   final bool isDragging;
 
@@ -174,6 +180,14 @@ class _AddLabelToCollection implements _Event {
   final String label;
 }
 
+@toString
+class _RequestAddMap implements _Event {
+  const _RequestAddMap();
+
+  @override
+  String toString() => _$toString();
+}
+
 @toString
 class _AddMapToCollection implements _Event {
   const _AddMapToCollection(this.location);

app/lib/widget/collection_browser/type.dart

@@ -221,6 +221,14 @@ class _DateItem extends _Item {
   final Date date;
 }
 
+class _PlacePickerRequest {
+  const _PlacePickerRequest({
+    this.initialPosition,
+  });
+
+  final MapCoord? initialPosition;
+}
+
 @toString
 class _ArchiveFailedError implements Exception {
   const _ArchiveFailedError(this.count);

app/lib/widget/my_app.dart

@@ -214,7 +214,6 @@ class _WrappedAppState extends State<_WrappedApp>
         ArchiveBrowser.routeName: ArchiveBrowser.buildRoute,
         TrustedCertManager.routeName: TrustedCertManager.buildRoute,
         MapBrowser.routeName: MapBrowser.buildRoute,
-        PlacePicker.routeName: PlacePicker.buildRoute,
       };
 
   Route<dynamic>? _onGenerateRoute(RouteSettings settings) {
@@ -242,6 +241,7 @@ class _WrappedAppState extends State<_WrappedApp>
     route ??= _handleImageEnhancerRoute(settings);
     route ??= _handleCollectionBrowserRoute(settings);
     route ??= _handleAccountSettingsRoute(settings);
+    route ??= _handlePlacePickerRoute(settings);
     return route;
   }
 
@@ -551,6 +551,18 @@ class _WrappedAppState extends State<_WrappedApp>
     return null;
   }
 
+  Route<dynamic>? _handlePlacePickerRoute(RouteSettings settings) {
+    try {
+      if (settings.name == PlacePicker.routeName) {
+        final args = settings.arguments as PlacePickerArguments?;
+        return PlacePicker.buildRoute(args, settings);
+      }
+    } catch (e) {
+      _log.severe("[_handlePlacePickerRoute] Failed while handling route", e);
+    }
+    return null;
+  }
+
   late final _bloc = context.read<_Bloc>();
   final _scaffoldMessengerKey = GlobalKey<ScaffoldMessengerState>();
   final _navigatorKey = GlobalKey<NavigatorState>();

app/lib/widget/place_picker/bloc.dart

@@ -2,8 +2,13 @@ part of 'place_picker.dart';
 
 @npLog
 class _Bloc extends Bloc<_Event, _State> with BlocLogger {
-  _Bloc() : super(_State.init()) {
+  _Bloc({
+    required this.prefController,
+    required this.initialPosition,
+    required this.initialZoom,
+  }) : super(_State.init()) {
     on<_SetPosition>(_onSetPosition);
+    on<_Done>(_onDone);
   }
 
   @override
@@ -18,4 +23,17 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
     // _log.info(ev);
     emit(state.copyWith(position: ev.value));
   }
+
+  void _onDone(_Done ev, _Emitter emit) {
+    _log.info(ev);
+    if (prefController.mapBrowserPrevPositionValue == null &&
+        state.position != null) {
+      prefController.setMapBrowserPrevPosition(state.position!.center);
+    }
+    emit(state.copyWith(isDone: true));
+  }
+
+  final PrefController prefController;
+  final MapCoord? initialPosition;
+  final double? initialZoom;
 }

app/lib/widget/place_picker/place_picker.dart

@@ -14,24 +14,54 @@ part 'bloc.dart';
 part 'place_picker.g.dart';
 part 'state_event.dart';
 
+class PlacePickerArguments {
+  const PlacePickerArguments({
+    this.initialPosition,
+    this.initialZoom,
+  });
+
+  final MapCoord? initialPosition;
+  final double? initialZoom;
+}
+
 class PlacePicker extends StatelessWidget {
   static const routeName = "/place-picker";
 
-  static Route buildRoute(RouteSettings settings) =>
+  static Route buildRoute(PlacePickerArguments? args, RouteSettings settings) =>
       MaterialPageRoute<CameraPosition>(
-        builder: (_) => const PlacePicker(),
+        builder: (_) => PlacePicker.fromArgs(args),
         settings: settings,
       );
 
-  const PlacePicker({super.key});
+  const PlacePicker({
+    super.key,
+    required this.initialPosition,
+    required this.initialZoom,
+  });
+
+  PlacePicker.fromArgs(
+    PlacePickerArguments? args, {
+    Key? key,
+  }) : this(
+          key: key,
+          initialPosition: args?.initialPosition,
+          initialZoom: args?.initialZoom,
+        );
 
   @override
   Widget build(BuildContext context) {
     return BlocProvider(
-      create: (context) => _Bloc(),
+      create: (context) => _Bloc(
+        prefController: context.read(),
+        initialPosition: initialPosition,
+        initialZoom: initialZoom,
+      ),
       child: const _WrappedPlacePicker(),
     );
   }
+
+  final MapCoord? initialPosition;
+  final double? initialZoom;
 }
 
 @npLog
@@ -40,19 +70,31 @@ class _WrappedPlacePicker extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(
-        title: Text(L10n.global().placePickerTitle),
-        leading: IconButton(
-          onPressed: () {
-            final position = context.state.position;
-            _log.info("[build] Position picked: $position");
-            Navigator.of(context).pop(position);
+    return MultiBlocListener(
+      listeners: [
+        _BlocListenerT(
+          selector: (state) => state.isDone,
+          listener: (context, isDone) {
+            if (isDone) {
+              final position = context.state.position;
+              _log.info("[build] Position picked: $position");
+              Navigator.of(context).pop(position);
+            }
           },
-          icon: const Icon(Icons.check_outlined),
         ),
+      ],
+      child: Scaffold(
+        appBar: AppBar(
+          title: Text(L10n.global().placePickerTitle),
+          leading: IconButton(
+            onPressed: () {
+              context.addEvent(const _Done());
+            },
+            icon: const Icon(Icons.check_outlined),
+          ),
+        ),
+        body: const _BodyView(),
       ),
-      body: const _BodyView(),
     );
   }
 }
@@ -62,15 +104,16 @@ class _BodyView extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final prevPosition =
-        context.read<PrefController>().mapBrowserPrevPositionValue;
+    final position = context.bloc.initialPosition ??
+        context.bloc.prefController.mapBrowserPrevPositionValue;
     return ValueStreamBuilderEx<GpsMapProvider>(
       stream: context.read<PrefController>().gpsMapProvider,
       builder: StreamWidgetBuilder.value(
         (context, gpsMapProvider) => PlacePickerView(
           providerHint: gpsMapProvider,
-          initialPosition: prevPosition ?? const MapCoord(0, 0),
-          initialZoom: prevPosition == null ? 2.5 : 10,
+          initialPosition: position ?? const MapCoord(0, 0),
+          initialZoom:
+              context.bloc.initialZoom ?? (position == null ? 2.5 : 10),
           onCameraMove: (position) {
             context.addEvent(_SetPosition(position));
           },
@@ -82,7 +125,7 @@ class _BodyView extends StatelessWidget {
 
 // typedef _BlocBuilder = BlocBuilder<_Bloc, _State>;
 // typedef _BlocListener = BlocListener<_Bloc, _State>;
-// typedef _BlocListenerT<T> = BlocListenerT<_Bloc, _State, T>;
+typedef _BlocListenerT<T> = BlocListenerT<_Bloc, _State, T>;
 // typedef _BlocSelector<T> = BlocSelector<_Bloc, _State, T>;
 typedef _Emitter = Emitter<_State>;
 

app/lib/widget/place_picker/place_picker.g.dart

@@ -13,18 +13,19 @@ part of 'place_picker.dart';
 // **************************************************************************
 
 abstract class $_StateCopyWithWorker {
-  _State call({CameraPosition? position});
+  _State call({CameraPosition? position, bool? isDone});
 }
 
 class _$_StateCopyWithWorkerImpl implements $_StateCopyWithWorker {
   _$_StateCopyWithWorkerImpl(this.that);
 
   @override
-  _State call({dynamic position = copyWithNull}) {
+  _State call({dynamic position = copyWithNull, dynamic isDone}) {
     return _State(
         position: position == copyWithNull
             ? that.position
-            : position as CameraPosition?);
+            : position as CameraPosition?,
+        isDone: isDone as bool? ?? that.isDone);
   }
 
   final _State that;
@@ -61,7 +62,7 @@ extension _$_BlocNpLog on _Bloc {
 extension _$_StateToString on _State {
   String _$toString() {
     // ignore: unnecessary_string_interpolations
-    return "_State {position: $position}";
+    return "_State {position: $position, isDone: $isDone}";
   }
 }
 
@@ -71,3 +72,10 @@ extension _$_SetPositionToString on _SetPosition {
     return "_SetPosition {value: $value}";
   }
 }
+
+extension _$_DoneToString on _Done {
+  String _$toString() {
+    // ignore: unnecessary_string_interpolations
+    return "_Done {}";
+  }
+}

app/lib/widget/place_picker/state_event.dart

@@ -5,14 +5,18 @@ part of 'place_picker.dart';
 class _State {
   const _State({
     this.position,
+    required this.isDone,
   });
 
-  factory _State.init() => const _State();
+  factory _State.init() => const _State(
+    isDone: false,
+  );
 
   @override
   String toString() => _$toString();
 
   final CameraPosition? position;
+  final bool isDone;
 }
 
 abstract class _Event {}
@@ -26,3 +30,11 @@ class _SetPosition implements _Event {
 
   final CameraPosition value;
 }
+
+@toString
+class _Done implements _Event {
+  const _Done();
+
+  @override
+  String toString() => _$toString();
+}

np_db/lib/src/api.dart

@@ -454,6 +454,13 @@ abstract class NpDb {
     List<String>? excludeRelativeRoots,
   });
 
+  /// Return the location data of the first file (sorted by date time in
+  /// descending order) in a group of files
+  Future<DbLocation?> getFirstLocationOfFileIds({
+    required DbAccount account,
+    required List<int> fileIds,
+  });
+
   /// Return the latitude, longitude and the file id of all files
   Future<List<DbImageLatLng>> getImageLatLngWithFileIds({
     required DbAccount account,

np_db_sqlite/lib/src/database/image_location_extension.dart

@@ -200,6 +200,64 @@ extension SqliteDbImageLocationExtension on SqliteDb {
     }).get();
   }
 
+  Future<ImageLocation?> queryFirstImageLocationByFileIds({
+    required ByAccount account,
+    required List<int> fileIds,
+  }) async {
+    final candidates = await fileIds.withPartition((sublist) async {
+      final query = selectOnly(files).join([
+        innerJoin(accountFiles, accountFiles.file.equalsExp(files.rowId),
+            useColumns: false),
+        if (account.dbAccount != null) ...[
+          innerJoin(accounts, accounts.rowId.equalsExp(accountFiles.account),
+              useColumns: false),
+          innerJoin(servers, servers.rowId.equalsExp(accounts.server),
+              useColumns: false),
+        ],
+        innerJoin(imageLocations,
+            imageLocations.accountFile.equalsExp(accountFiles.rowId),
+            useColumns: false),
+      ]);
+      query.addColumns([
+        accountFiles.rowId,
+        accountFiles.bestDateTime,
+      ]);
+
+      if (account.sqlAccount != null) {
+        query.where(accountFiles.account.equals(account.sqlAccount!.rowId));
+      } else if (account.dbAccount != null) {
+        query
+          ..where(servers.address.equals(account.dbAccount!.serverAddress))
+          ..where(accounts.userId
+              .equals(account.dbAccount!.userId.toCaseInsensitiveString()));
+      }
+
+      query
+        ..where(files.fileId.isIn(sublist))
+        ..where(imageLocations.latitude.isNotNull() &
+            imageLocations.longitude.isNotNull())
+        ..orderBy([OrderingTerm.desc(accountFiles.bestDateTime)])
+        ..limit(1);
+      return [
+        await query
+            .map((r) => (
+                  rowId: r.read(accountFiles.rowId)!,
+                  dateTime: r.read(accountFiles.bestDateTime)!,
+                ))
+            .getSingleOrNull()
+      ];
+    }, _maxByFileIdsSize);
+    final winner =
+        candidates.nonNulls.sortedBy((e) => e.dateTime).reversed.firstOrNull;
+    if (winner == null) {
+      return null;
+    }
+
+    final reusltQuery = select(imageLocations)
+      ..where((t) => t.accountFile.equals(winner.rowId));
+    return reusltQuery.getSingleOrNull();
+  }
+
   Future<List<ImageLocationGroup>> _groupImageLocationsBy({
     required ByAccount account,
     required GeneratedColumn<String> by,

np_db_sqlite/lib/src/sqlite_api.dart

@@ -607,6 +607,20 @@ class NpDbSqlite implements NpDb {
     );
   }
 
+  @override
+  Future<DbLocation?> getFirstLocationOfFileIds({
+    required DbAccount account,
+    required List<int> fileIds,
+  }) async {
+    final sqlObj = await _db.use((db) async {
+      return await db.queryFirstImageLocationByFileIds(
+        account: ByAccount.db(account),
+        fileIds: fileIds,
+      );
+    });
+    return sqlObj?.let(ImageLocationConverter.fromSql);
+  }
+
   @override
   Future<List<DbImageLatLng>> getImageLatLngWithFileIds({
     required DbAccount account,