Merge branch 'reverse-geocoding' into dev

2025-02-24 10:28:50 +01:00 · 2022-08-29 03:38:56 +08:00 · 2022-08-29 03:38:56 +08:00 · 51e3431cdc
commit 51e3431cdc
parent 94c7e420d1 66d31d3c20
41 changed files with 2962 additions and 71 deletions
--- a/app/assets/cities.sqlite
+++ b/app/assets/cities.sqlite
--- a/app/lib/api/api_util.dart
+++ b/app/lib/api/api_util.dart
@ -56,6 +56,26 @@ String getFilePreviewUrlRelative(
  return url;
 }

+/// Return the preview image URL for [fileId]. See [getFilePreviewUrlRelative]
+String getFilePreviewUrlByFileId(
+  Account account,
+  int fileId, {
+  required int width,
+  required int height,
+  String? mode,
+  bool? a,
+}) {
+  String url = "${account.url}/index.php/core/preview?fileId=$fileId";
+  url = "$url&x=$width&y=$height";
+  if (mode != null) {
+    url = "$url&mode=$mode";
+  }
+  if (a != null) {
+    url = "$url&a=${a ? 1 : 0}";
+  }
+  return url;
+}
+
 String getFileUrl(Account account, File file) {
  return "${account.url}/${getFileUrlRelative(file)}";
 }
--- a/app/lib/bloc/home_search_suggestion.dart
+++ b/app/lib/bloc/home_search_suggestion.dart
@ -11,6 +11,7 @@ import 'package:nc_photos/entity/person.dart';
 import 'package:nc_photos/entity/tag.dart';
 import 'package:nc_photos/iterable_extension.dart';
 import 'package:nc_photos/use_case/list_album.dart';
+import 'package:nc_photos/use_case/list_location_group.dart';
 import 'package:nc_photos/use_case/list_person.dart';
 import 'package:nc_photos/use_case/list_tag.dart';
 import 'package:tuple/tuple.dart';
@ -51,6 +52,17 @@ class HomeSearchPersonResult implements HomeSearchResult {
  final Person person;
 }

+class HomeSearchLocationResult implements HomeSearchResult {
+  const HomeSearchLocationResult(this.location);
+
+  @override
+  toString() => "$runtimeType {"
+      "location: $location, "
+      "}";
+
+  final LocationGroup location;
+}
+
 abstract class HomeSearchSuggestionBlocEvent {
  const HomeSearchSuggestionBlocEvent();
 }
@ -200,6 +212,19 @@ class HomeSearchSuggestionBloc
    } catch (e) {
      _log.warning("[_onEventPreloadData] Failed while ListPerson", e);
    }
+    try {
+      final locations = await ListLocationGroup(_c)(account);
+      // replace duplicated entries in name by the one in countryCode
+      final map = <String, LocationGroup>{};
+      for (final l in locations.name + locations.countryCode) {
+        map[l.place] = l;
+      }
+      product.addAll(map.values.map((e) => _LocationSearcheable(e)));
+      _log.info(
+          "[_onEventPreloadData] Loaded ${locations.name.length + locations.countryCode.length} locations");
+    } catch (e) {
+      _log.warning("[_onEventPreloadData] Failed while ListLocationGroup", e);
+    }

    _setSearchItems(product);
  }
@ -262,3 +287,15 @@ class _PersonSearcheable implements _Searcheable {

  final Person person;
 }
+
+class _LocationSearcheable implements _Searcheable {
+  const _LocationSearcheable(this.location);
+
+  @override
+  toKeywords() => [location.place.toCi()];
+
+  @override
+  toResult() => HomeSearchLocationResult(location);
+
+  final LocationGroup location;
+}
--- a/app/lib/bloc/list_location.dart
+++ b/app/lib/bloc/list_location.dart
@ -0,0 +1,176 @@
+import 'package:bloc/bloc.dart';
+import 'package:logging/logging.dart';
+import 'package:nc_photos/account.dart';
+import 'package:nc_photos/di_container.dart';
+import 'package:nc_photos/entity/file.dart';
+import 'package:nc_photos/entity/file_util.dart' as file_util;
+import 'package:nc_photos/event/event.dart';
+import 'package:nc_photos/throttler.dart';
+import 'package:nc_photos/use_case/list_location_file.dart';
+import 'package:nc_photos/use_case/list_location_group.dart';
+
+abstract class ListLocationBlocEvent {
+  const ListLocationBlocEvent();
+}
+
+class ListLocationBlocQuery extends ListLocationBlocEvent {
+  const ListLocationBlocQuery(this.account);
+
+  @override
+  toString() => "$runtimeType {"
+      "account: $account, "
+      "}";
+
+  final Account account;
+}
+
+/// An external event has happened and may affect the state of this bloc
+class _ListLocationBlocExternalEvent extends ListLocationBlocEvent {
+  const _ListLocationBlocExternalEvent();
+
+  @override
+  toString() => "$runtimeType {"
+      "}";
+}
+
+abstract class ListLocationBlocState {
+  const ListLocationBlocState(this.account, this.result);
+
+  @override
+  toString() => "$runtimeType {"
+      "account: $account, "
+      "result: $result, "
+      "}";
+
+  final Account? account;
+  final LocationGroupResult result;
+}
+
+class ListLocationBlocInit extends ListLocationBlocState {
+  ListLocationBlocInit()
+      : super(null, const LocationGroupResult([], [], [], []));
+}
+
+class ListLocationBlocLoading extends ListLocationBlocState {
+  const ListLocationBlocLoading(Account? account, LocationGroupResult result)
+      : super(account, result);
+}
+
+class ListLocationBlocSuccess extends ListLocationBlocState {
+  const ListLocationBlocSuccess(Account? account, LocationGroupResult result)
+      : super(account, result);
+}
+
+class ListLocationBlocFailure extends ListLocationBlocState {
+  const ListLocationBlocFailure(
+      Account? account, LocationGroupResult result, this.exception)
+      : super(account, result);
+
+  @override
+  toString() => "$runtimeType {"
+      "super: ${super.toString()}, "
+      "exception: $exception, "
+      "}";
+
+  final Object exception;
+}
+
+/// The state of this bloc is inconsistent. This typically means that the data
+/// may have been changed externally
+class ListLocationBlocInconsistent extends ListLocationBlocState {
+  const ListLocationBlocInconsistent(
+      Account? account, LocationGroupResult result)
+      : super(account, result);
+}
+
+/// List all files associated with a specific tag
+class ListLocationBloc
+    extends Bloc<ListLocationBlocEvent, ListLocationBlocState> {
+  ListLocationBloc(this._c)
+      : assert(require(_c)),
+        assert(ListLocationFile.require(_c)),
+        super(ListLocationBlocInit()) {
+    _fileRemovedEventListener.begin();
+
+    on<ListLocationBlocEvent>(_onEvent);
+  }
+
+  static bool require(DiContainer c) =>
+      DiContainer.has(c, DiType.taggedFileRepo);
+
+  @override
+  close() {
+    _fileRemovedEventListener.end();
+    return super.close();
+  }
+
+  Future<void> _onEvent(
+      ListLocationBlocEvent event, Emitter<ListLocationBlocState> emit) async {
+    _log.info("[_onEvent] $event");
+    if (event is ListLocationBlocQuery) {
+      await _onEventQuery(event, emit);
+    } else if (event is _ListLocationBlocExternalEvent) {
+      await _onExternalEvent(event, emit);
+    }
+  }
+
+  Future<void> _onEventQuery(
+      ListLocationBlocQuery ev, Emitter<ListLocationBlocState> emit) async {
+    try {
+      emit(ListLocationBlocLoading(ev.account, state.result));
+      emit(ListLocationBlocSuccess(ev.account, await _query(ev)));
+    } catch (e, stackTrace) {
+      _log.severe("[_onEventQuery] Exception while request", e, stackTrace);
+      emit(ListLocationBlocFailure(ev.account, state.result, e));
+    }
+  }
+
+  Future<void> _onExternalEvent(_ListLocationBlocExternalEvent ev,
+      Emitter<ListLocationBlocState> emit) async {
+    emit(ListLocationBlocInconsistent(state.account, state.result));
+  }
+
+  void _onFileRemovedEvent(FileRemovedEvent ev) {
+    if (state is ListLocationBlocInit) {
+      // no data in this bloc, ignore
+      return;
+    }
+    if (_isFileOfInterest(ev.file)) {
+      _refreshThrottler.trigger(
+        maxResponceTime: const Duration(seconds: 3),
+        maxPendingCount: 10,
+      );
+    }
+  }
+
+  Future<LocationGroupResult> _query(ListLocationBlocQuery ev) =>
+      ListLocationGroup(_c.withLocalRepo())(ev.account);
+
+  bool _isFileOfInterest(File file) {
+    if (!file_util.isSupportedFormat(file)) {
+      return false;
+    }
+
+    for (final r in state.account?.roots ?? []) {
+      final dir = File(path: file_util.unstripPath(state.account!, r));
+      if (file_util.isUnderDir(file, dir)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  final DiContainer _c;
+
+  late final _fileRemovedEventListener =
+      AppEventListener<FileRemovedEvent>(_onFileRemovedEvent);
+
+  late final _refreshThrottler = Throttler(
+    onTriggered: (_) {
+      add(const _ListLocationBlocExternalEvent());
+    },
+    logTag: "ListLocationBloc.refresh",
+  );
+
+  static final _log = Logger("bloc.list_location.ListLocationBloc");
+}
--- a/app/lib/bloc/list_location_file.dart
+++ b/app/lib/bloc/list_location_file.dart
@ -0,0 +1,184 @@
+import 'package:bloc/bloc.dart';
+import 'package:logging/logging.dart';
+import 'package:nc_photos/account.dart';
+import 'package:nc_photos/di_container.dart';
+import 'package:nc_photos/entity/file.dart';
+import 'package:nc_photos/entity/file_util.dart' as file_util;
+import 'package:nc_photos/event/event.dart';
+import 'package:nc_photos/throttler.dart';
+import 'package:nc_photos/use_case/list_location_file.dart';
+
+abstract class ListLocationFileBlocEvent {
+  const ListLocationFileBlocEvent();
+}
+
+class ListLocationFileBlocQuery extends ListLocationFileBlocEvent {
+  const ListLocationFileBlocQuery(this.account, this.place, this.countryCode);
+
+  @override
+  toString() => "$runtimeType {"
+      "account: $account, "
+      "place: $place, "
+      "countryCode: $countryCode, "
+      "}";
+
+  final Account account;
+  final String? place;
+  final String countryCode;
+}
+
+/// An external event has happened and may affect the state of this bloc
+class _ListLocationFileBlocExternalEvent extends ListLocationFileBlocEvent {
+  const _ListLocationFileBlocExternalEvent();
+
+  @override
+  toString() => "$runtimeType {"
+      "}";
+}
+
+abstract class ListLocationFileBlocState {
+  const ListLocationFileBlocState(this.account, this.items);
+
+  @override
+  toString() => "$runtimeType {"
+      "account: $account, "
+      "items: List {length: ${items.length}}, "
+      "}";
+
+  final Account? account;
+  final List<File> items;
+}
+
+class ListLocationFileBlocInit extends ListLocationFileBlocState {
+  ListLocationFileBlocInit() : super(null, const []);
+}
+
+class ListLocationFileBlocLoading extends ListLocationFileBlocState {
+  const ListLocationFileBlocLoading(Account? account, List<File> items)
+      : super(account, items);
+}
+
+class ListLocationFileBlocSuccess extends ListLocationFileBlocState {
+  const ListLocationFileBlocSuccess(Account? account, List<File> items)
+      : super(account, items);
+}
+
+class ListLocationFileBlocFailure extends ListLocationFileBlocState {
+  const ListLocationFileBlocFailure(
+      Account? account, List<File> items, this.exception)
+      : super(account, items);
+
+  @override
+  toString() => "$runtimeType {"
+      "super: ${super.toString()}, "
+      "exception: $exception, "
+      "}";
+
+  final Object exception;
+}
+
+/// The state of this bloc is inconsistent. This typically means that the data
+/// may have been changed externally
+class ListLocationFileBlocInconsistent extends ListLocationFileBlocState {
+  const ListLocationFileBlocInconsistent(Account? account, List<File> items)
+      : super(account, items);
+}
+
+/// List all files associated with a specific tag
+class ListLocationFileBloc
+    extends Bloc<ListLocationFileBlocEvent, ListLocationFileBlocState> {
+  ListLocationFileBloc(this._c)
+      : assert(require(_c)),
+        assert(ListLocationFile.require(_c)),
+        super(ListLocationFileBlocInit()) {
+    _fileRemovedEventListener.begin();
+
+    on<ListLocationFileBlocEvent>(_onEvent);
+  }
+
+  static bool require(DiContainer c) =>
+      DiContainer.has(c, DiType.taggedFileRepo);
+
+  @override
+  close() {
+    _fileRemovedEventListener.end();
+    return super.close();
+  }
+
+  Future<void> _onEvent(ListLocationFileBlocEvent event,
+      Emitter<ListLocationFileBlocState> emit) async {
+    _log.info("[_onEvent] $event");
+    if (event is ListLocationFileBlocQuery) {
+      await _onEventQuery(event, emit);
+    } else if (event is _ListLocationFileBlocExternalEvent) {
+      await _onExternalEvent(event, emit);
+    }
+  }
+
+  Future<void> _onEventQuery(ListLocationFileBlocQuery ev,
+      Emitter<ListLocationFileBlocState> emit) async {
+    try {
+      emit(ListLocationFileBlocLoading(ev.account, state.items));
+      emit(ListLocationFileBlocSuccess(ev.account, await _query(ev)));
+    } catch (e, stackTrace) {
+      _log.severe("[_onEventQuery] Exception while request", e, stackTrace);
+      emit(ListLocationFileBlocFailure(ev.account, state.items, e));
+    }
+  }
+
+  Future<void> _onExternalEvent(_ListLocationFileBlocExternalEvent ev,
+      Emitter<ListLocationFileBlocState> emit) async {
+    emit(ListLocationFileBlocInconsistent(state.account, state.items));
+  }
+
+  void _onFileRemovedEvent(FileRemovedEvent ev) {
+    if (state is ListLocationFileBlocInit) {
+      // no data in this bloc, ignore
+      return;
+    }
+    if (_isFileOfInterest(ev.file)) {
+      _refreshThrottler.trigger(
+        maxResponceTime: const Duration(seconds: 3),
+        maxPendingCount: 10,
+      );
+    }
+  }
+
+  Future<List<File>> _query(ListLocationFileBlocQuery ev) async {
+    final files = <File>[];
+    for (final r in ev.account.roots) {
+      final dir = File(path: file_util.unstripPath(ev.account, r));
+      files.addAll(await ListLocationFile(_c)(
+          ev.account, dir, ev.place, ev.countryCode));
+    }
+    return files.where((f) => file_util.isSupportedFormat(f)).toList();
+  }
+
+  bool _isFileOfInterest(File file) {
+    if (!file_util.isSupportedFormat(file)) {
+      return false;
+    }
+
+    for (final r in state.account?.roots ?? []) {
+      final dir = File(path: file_util.unstripPath(state.account!, r));
+      if (file_util.isUnderDir(file, dir)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  final DiContainer _c;
+
+  late final _fileRemovedEventListener =
+      AppEventListener<FileRemovedEvent>(_onFileRemovedEvent);
+
+  late final _refreshThrottler = Throttler(
+    onTriggered: (_) {
+      add(const _ListLocationFileBlocExternalEvent());
+    },
+    logTag: "ListLocationFileBloc.refresh",
+  );
+
+  static final _log = Logger("bloc.list_location_file.ListLocationFileBloc");
+}
--- a/app/lib/bloc/search_landing.dart
+++ b/app/lib/bloc/search_landing.dart
@ -3,6 +3,7 @@ import 'package:logging/logging.dart';
 import 'package:nc_photos/account.dart';
 import 'package:nc_photos/di_container.dart';
 import 'package:nc_photos/entity/person.dart';
+import 'package:nc_photos/use_case/list_location_group.dart';
 import 'package:nc_photos/use_case/list_person.dart';

 abstract class SearchLandingBlocEvent {
@ -21,36 +22,41 @@ class SearchLandingBlocQuery extends SearchLandingBlocEvent {
 }

 abstract class SearchLandingBlocState {
-  const SearchLandingBlocState(this.account, this.persons);
+  const SearchLandingBlocState(this.account, this.persons, this.locations);

  @override
  toString() => "$runtimeType {"
      "account: $account, "
      "persons: List {length: ${persons.length}}, "
+      "locations: $locations, "
      "}";

  final Account? account;
  final List<Person> persons;
+  final LocationGroupResult locations;
 }

 class SearchLandingBlocInit extends SearchLandingBlocState {
-  SearchLandingBlocInit() : super(null, const []);
+  SearchLandingBlocInit()
+      : super(null, const [], const LocationGroupResult([], [], [], []));
 }

 class SearchLandingBlocLoading extends SearchLandingBlocState {
-  const SearchLandingBlocLoading(Account? account, List<Person> persons)
-      : super(account, persons);
+  const SearchLandingBlocLoading(
+      Account? account, List<Person> persons, LocationGroupResult locations)
+      : super(account, persons, locations);
 }

 class SearchLandingBlocSuccess extends SearchLandingBlocState {
-  const SearchLandingBlocSuccess(Account? account, List<Person> persons)
-      : super(account, persons);
+  const SearchLandingBlocSuccess(
+      Account? account, List<Person> persons, LocationGroupResult locations)
+      : super(account, persons, locations);
 }

 class SearchLandingBlocFailure extends SearchLandingBlocState {
-  const SearchLandingBlocFailure(
-      Account? account, List<Person> persons, this.exception)
-      : super(account, persons);
+  const SearchLandingBlocFailure(Account? account, List<Person> persons,
+      LocationGroupResult locations, this.exception)
+      : super(account, persons, locations);

  @override
  toString() => "$runtimeType {"
@ -83,17 +89,39 @@ class SearchLandingBloc
  Future<void> _onEventQuery(
      SearchLandingBlocQuery ev, Emitter<SearchLandingBlocState> emit) async {
    try {
-      emit(SearchLandingBlocLoading(ev.account, state.persons));
-      emit(SearchLandingBlocSuccess(ev.account, await _query(ev)));
+      emit(
+          SearchLandingBlocLoading(ev.account, state.persons, state.locations));
+
+      List<Person>? persons;
+      try {
+        persons = await _queryPeople(ev);
+      } catch (e, stackTrace) {
+        _log.shout("[_onEventQuery] Failed while _queryPeople", e, stackTrace);
+      }
+
+      LocationGroupResult? locations;
+      try {
+        locations = await _queryLocations(ev);
+      } catch (e, stackTrace) {
+        _log.shout(
+            "[_onEventQuery] Failed while _queryLocations", e, stackTrace);
+      }
+
+      emit(SearchLandingBlocSuccess(ev.account, persons ?? [],
+          locations ?? const LocationGroupResult([], [], [], [])));
    } catch (e, stackTrace) {
      _log.severe("[_onEventQuery] Exception while request", e, stackTrace);
-      emit(SearchLandingBlocFailure(ev.account, state.persons, e));
+      emit(SearchLandingBlocFailure(
+          ev.account, state.persons, state.locations, e));
    }
  }

-  Future<List<Person>> _query(SearchLandingBlocQuery ev) =>
+  Future<List<Person>> _queryPeople(SearchLandingBlocQuery ev) =>
      ListPerson(_c.withLocalRepo())(ev.account);

+  Future<LocationGroupResult> _queryLocations(SearchLandingBlocQuery ev) =>
+      ListLocationGroup(_c.withLocalRepo())(ev.account);
+
  final DiContainer _c;

  static final _log = Logger("bloc.search_landing.SearchLandingBloc");
--- a/app/lib/entity/file.dart
+++ b/app/lib/entity/file.dart
@ -21,6 +21,81 @@ int compareFileDateTimeDescending(File x, File y) {
  }
 }

+class ImageLocation with EquatableMixin {
+  const ImageLocation({
+    this.version = appVersion,
+    required this.name,
+    required this.latitude,
+    required this.longitude,
+    required this.countryCode,
+    this.admin1,
+    this.admin2,
+  });
+
+  factory ImageLocation.empty() => const ImageLocation(
+      name: null, latitude: null, longitude: null, countryCode: null);
+
+  static ImageLocation fromJson(JsonObj json) {
+    return ImageLocation(
+      version: json["v"],
+      name: json["name"],
+      latitude: json["lat"] == null ? null : json["lat"] / 10000,
+      longitude: json["lng"] == null ? null : json["lng"] / 10000,
+      countryCode: json["cc"],
+      admin1: json["admin1"],
+      admin2: json["admin2"],
+    );
+  }
+
+  JsonObj toJson() => {
+        "v": version,
+        if (name != null) "name": name,
+        if (latitude != null) "lat": (latitude! * 10000).round(),
+        if (longitude != null) "lng": (longitude! * 10000).round(),
+        if (countryCode != null) "cc": countryCode,
+        if (admin1 != null) "admin1": admin1,
+        if (admin2 != null) "admin2": admin2,
+      };
+
+  bool isEmpty() => name == null;
+
+  @override
+  toString() {
+    var product = "$runtimeType {"
+        "version: $version, ";
+    if (name != null) {
+      product += "name: $name, "
+          "latitude: $latitude, "
+          "longitude: $longitude, "
+          "countryCode: $countryCode, "
+          "admin1: $admin1, "
+          "admin2: $admin2, ";
+    }
+    return product + "}";
+  }
+
+  @override
+  get props => [
+        version,
+        name,
+        latitude,
+        longitude,
+        countryCode,
+        admin1,
+        admin2,
+      ];
+
+  final int version;
+  final String? name;
+  final double? latitude;
+  final double? longitude;
+  final String? countryCode;
+  final String? admin1;
+  final String? admin2;
+
+  static const appVersion = 1;
+}
+
 /// Immutable object that hold metadata of a [File]
 class Metadata with EquatableMixin {
  Metadata({
@ -238,6 +313,7 @@ class File with EquatableMixin {
    this.trashbinFilename,
    this.trashbinOriginalLocation,
    this.trashbinDeletionTime,
+    this.location,
  }) : path = path.trimAny("/");

  @override
@ -292,6 +368,9 @@ class File with EquatableMixin {
      overrideDateTime: json["overrideDateTime"] == null
          ? null
          : DateTime.parse(json["overrideDateTime"]),
+      location: json["location"] == null
+          ? null
+          : ImageLocation.fromJson(json["location"]),
    );
  }

@ -350,6 +429,9 @@ class File with EquatableMixin {
    if (overrideDateTime != null) {
      product += "overrideDateTime: $overrideDateTime, ";
    }
+    if (location != null) {
+      product += "location: $location, ";
+    }
    return product + "}";
  }

@ -377,6 +459,7 @@ class File with EquatableMixin {
      if (isArchived != null) "isArchived": isArchived,
      if (overrideDateTime != null)
        "overrideDateTime": overrideDateTime!.toUtc().toIso8601String(),
+      if (location != null) "location": location!.toJson(),
    };
  }

@ -399,6 +482,7 @@ class File with EquatableMixin {
    OrNull<Metadata>? metadata,
    OrNull<bool>? isArchived,
    OrNull<DateTime>? overrideDateTime,
+    OrNull<ImageLocation>? location,
  }) {
    return File(
      path: path ?? this.path,
@ -422,6 +506,7 @@ class File with EquatableMixin {
      overrideDateTime: overrideDateTime == null
          ? this.overrideDateTime
          : overrideDateTime.obj,
+      location: location == null ? this.location : location.obj,
    );
  }

@ -445,6 +530,7 @@ class File with EquatableMixin {
        // metadata is handled separately, see [equals]
        isArchived,
        overrideDateTime,
+        location,
      ];

  final String path;
@ -466,6 +552,7 @@ class File with EquatableMixin {
  final Metadata? metadata;
  final bool? isArchived;
  final DateTime? overrideDateTime;
+  final ImageLocation? location;
 }

 extension FileExtension on File {
@ -581,6 +668,7 @@ class FileRepo {
    OrNull<bool>? isArchived,
    OrNull<DateTime>? overrideDateTime,
    bool? favorite,
+    OrNull<ImageLocation>? location,
  }) =>
      dataSrc.updateProperty(
        account,
@ -589,6 +677,7 @@ class FileRepo {
        isArchived: isArchived,
        overrideDateTime: overrideDateTime,
        favorite: favorite,
+        location: location,
      );

  /// See [FileDataSource.copy]
@ -660,6 +749,7 @@ abstract class FileDataSource {
    OrNull<bool>? isArchived,
    OrNull<DateTime>? overrideDateTime,
    bool? favorite,
+    OrNull<ImageLocation>? location,
  });

  /// Copy [f] to [destination]
--- a/app/lib/entity/file/data_source.dart
+++ b/app/lib/entity/file/data_source.dart
@ -58,6 +58,7 @@ class FileWebdavDataSource implements FileDataSource {
        "app:metadata",
        "app:is-archived",
        "app:override-date-time",
+        "app:location",
      ],
    );
  }
@ -135,6 +136,7 @@ class FileWebdavDataSource implements FileDataSource {
    OrNull<bool>? isArchived,
    OrNull<DateTime>? overrideDateTime,
    bool? favorite,
+    OrNull<ImageLocation>? location,
  }) async {
    _log.info("[updateProperty] ${f.path}");
    if (metadata?.obj != null && metadata!.obj!.fileEtag != f.etag) {
@ -149,11 +151,14 @@ class FileWebdavDataSource implements FileDataSource {
        "app:override-date-time":
            overrideDateTime!.obj!.toUtc().toIso8601String(),
      if (favorite != null) "oc:favorite": favorite ? 1 : 0,
+      if (location?.obj != null)
+        "app:location": jsonEncode(location!.obj!.toJson()),
    };
    final removeProps = [
      if (OrNull.isSetNull(metadata)) "app:metadata",
      if (OrNull.isSetNull(isArchived)) "app:is-archived",
      if (OrNull.isSetNull(overrideDateTime)) "app:override-date-time",
+      if (OrNull.isSetNull(location)) "app:location",
    ];
    final response = await Api(account).files().proppatch(
          path: f.path,
@ -417,6 +422,7 @@ class FileSqliteDbDataSource implements FileDataSource {
                r.readTable(db.files),
                r.readTable(db.accountFiles),
                r.readTableOrNull(db.images),
+                r.readTableOrNull(db.imageLocations),
                r.readTableOrNull(db.trashes),
              ))
          .get();
@ -450,6 +456,7 @@ class FileSqliteDbDataSource implements FileDataSource {
    OrNull<bool>? isArchived,
    OrNull<DateTime>? overrideDateTime,
    bool? favorite,
+    OrNull<ImageLocation>? location,
  }) async {
    _log.info("[updateProperty] ${f.path}");
    await _c.sqliteDb.use((db) async {
@ -490,6 +497,26 @@ class FileSqliteDbDataSource implements FileDataSource {
              ));
        }
      }
+      if (location != null) {
+        if (location.obj == null) {
+          await (db.delete(db.imageLocations)
+                ..where((t) => t.accountFile.equals(rowIds.accountFileRowId)))
+              .go();
+        } else {
+          await db
+              .into(db.imageLocations)
+              .insertOnConflictUpdate(sql.ImageLocationsCompanion.insert(
+                accountFile: sql.Value(rowIds.accountFileRowId),
+                version: location.obj!.version,
+                name: sql.Value(location.obj!.name),
+                latitude: sql.Value(location.obj!.latitude),
+                longitude: sql.Value(location.obj!.longitude),
+                countryCode: sql.Value(location.obj!.countryCode),
+                admin1: sql.Value(location.obj!.admin1),
+                admin2: sql.Value(location.obj!.admin2),
+              ));
+        }
+      }
    });
  }

@ -627,6 +654,7 @@ class FileCachedDataSource implements FileDataSource {
    OrNull<bool>? isArchived,
    OrNull<DateTime>? overrideDateTime,
    bool? favorite,
+    OrNull<ImageLocation>? location,
  }) async {
    await _remoteSrc.updateProperty(
      account,
@ -635,6 +663,7 @@ class FileCachedDataSource implements FileDataSource {
      isArchived: isArchived,
      overrideDateTime: overrideDateTime,
      favorite: favorite,
+      location: location,
    );
    await _sqliteDbSrc.updateProperty(
      account,
@ -643,6 +672,7 @@ class FileCachedDataSource implements FileDataSource {
      isArchived: isArchived,
      overrideDateTime: overrideDateTime,
      favorite: favorite,
+      location: location,
    );

    // generate a new random token
--- a/app/lib/entity/file/file_cache_manager.dart
+++ b/app/lib/entity/file/file_cache_manager.dart
@ -226,6 +226,14 @@ class FileSqliteCacheUpdater {
                  t.accountFile.equals(thisRowIds.accountFileRowId),
            );
          }
+          if (f.imageLocation != null) {
+            batch.update(
+              db.imageLocations,
+              f.imageLocation!,
+              where: (sql.$ImageLocationsTable t) =>
+                  t.accountFile.equals(thisRowIds.accountFileRowId),
+            );
+          }
          if (f.trash != null) {
            batch.update(
              db.trashes,
@ -289,6 +297,10 @@ class FileSqliteCacheUpdater {
        await db.into(db.images).insert(
            f.image!.copyWith(accountFile: sql.Value(dbAccountFile.rowId)));
      }
+      if (f.imageLocation != null) {
+        await db.into(db.imageLocations).insert(f.imageLocation!
+            .copyWith(accountFile: sql.Value(dbAccountFile.rowId)));
+      }
      if (f.trash != null) {
        await db
            .into(db.trashes)
--- a/app/lib/entity/file_util.dart
+++ b/app/lib/entity/file_util.dart
@ -88,8 +88,11 @@ bool isNoMediaMarkerPath(String path) {
 }

 /// Return if there's missing metadata in [file]
+///
+/// Current this function will check both [File.metadata] and [File.location]
 bool isMissingMetadata(File file) =>
-    isSupportedImageFormat(file) && file.metadata == null;
+    isSupportedImageFormat(file) &&
+    (file.metadata == null || file.location == null);

 final _supportedFormatMimes = [
  "image/jpeg",
--- a/app/lib/entity/search/data_source.dart
+++ b/app/lib/entity/search/data_source.dart
@ -39,6 +39,7 @@ class SearchSqliteDbDataSource implements SearchDataSource {
                r.readTable(db.files),
                r.readTable(db.accountFiles),
                r.readTableOrNull(db.images),
+                r.readTableOrNull(db.imageLocations),
                r.readTableOrNull(db.trashes),
              ))
          .get();
--- a/app/lib/entity/sqlite_table.dart
+++ b/app/lib/entity/sqlite_table.dart
@ -89,6 +89,22 @@ class Images extends Table {
  get primaryKey => {accountFile};
 }

+/// Estimated locations for images
+class ImageLocations extends Table {
+  IntColumn get accountFile =>
+      integer().references(AccountFiles, #rowId, onDelete: KeyAction.cascade)();
+  IntColumn get version => integer()();
+  TextColumn get name => text().nullable()();
+  RealColumn get latitude => real().nullable()();
+  RealColumn get longitude => real().nullable()();
+  TextColumn get countryCode => text().nullable()();
+  TextColumn get admin1 => text().nullable()();
+  TextColumn get admin2 => text().nullable()();
+
+  @override
+  get primaryKey => {accountFile};
+}
+
 /// A file inside trashbin
@DataClassName("Trash")
 class Trashes extends Table {
@ -184,6 +200,7 @@ class Persons extends Table {
    Accounts,
    Files,
    Images,
+    ImageLocations,
    Trashes,
    AccountFiles,
    DirFiles,
@ -201,7 +218,7 @@ class SqliteDb extends _$SqliteDb {
  SqliteDb.connect(DatabaseConnection connection) : super.connect(connection);

  @override
-  get schemaVersion => 2;
+  get schemaVersion => 3;

  @override
  get migration => MigrationStrategy(
@ -242,6 +259,10 @@ class SqliteDb extends _$SqliteDb {
                await m.createTable(persons);
                await _createIndexV2(m);
              }
+              if (from < 3) {
+                await m.createTable(imageLocations);
+                await _createIndexV3(m);
+              }
            });
          } catch (e, stackTrace) {
            _log.shout("[onUpgrade] Failed upgrading sqlite db", e, stackTrace);
@ -265,6 +286,17 @@ class SqliteDb extends _$SqliteDb {
        "CREATE INDEX persons_account_index ON persons(account);"));
  }

+  Future<void> _createIndexV3(Migrator m) async {
+    await m.createIndex(Index("image_locations_name_index",
+        "CREATE INDEX image_locations_name_index ON image_locations(name);"));
+    await m.createIndex(Index("image_locations_country_code_index",
+        "CREATE INDEX image_locations_country_code_index ON image_locations(country_code);"));
+    await m.createIndex(Index("image_locations_admin1_index",
+        "CREATE INDEX image_locations_admin1_index ON image_locations(admin1);"));
+    await m.createIndex(Index("image_locations_admin2_index",
+        "CREATE INDEX image_locations_admin2_index ON image_locations(admin2);"));
+  }
+
  static final _log = Logger("entity.sqlite_table.SqliteDb");
 }

--- a/app/lib/entity/sqlite_table.g.dart
+++ b/app/lib/entity/sqlite_table.g.dart
@ -1820,6 +1820,416 @@ class $ImagesTable extends Images with TableInfo<$ImagesTable, Image> {
      const _DateTimeConverter();
 }

+class ImageLocation extends DataClass implements Insertable<ImageLocation> {
+  final int accountFile;
+  final int version;
+  final String? name;
+  final double? latitude;
+  final double? longitude;
+  final String? countryCode;
+  final String? admin1;
+  final String? admin2;
+  ImageLocation(
+      {required this.accountFile,
+      required this.version,
+      this.name,
+      this.latitude,
+      this.longitude,
+      this.countryCode,
+      this.admin1,
+      this.admin2});
+  factory ImageLocation.fromData(Map<String, dynamic> data, {String? prefix}) {
+    final effectivePrefix = prefix ?? '';
+    return ImageLocation(
+      accountFile: const IntType()
+          .mapFromDatabaseResponse(data['${effectivePrefix}account_file'])!,
+      version: const IntType()
+          .mapFromDatabaseResponse(data['${effectivePrefix}version'])!,
+      name: const StringType()
+          .mapFromDatabaseResponse(data['${effectivePrefix}name']),
+      latitude: const RealType()
+          .mapFromDatabaseResponse(data['${effectivePrefix}latitude']),
+      longitude: const RealType()
+          .mapFromDatabaseResponse(data['${effectivePrefix}longitude']),
+      countryCode: const StringType()
+          .mapFromDatabaseResponse(data['${effectivePrefix}country_code']),
+      admin1: const StringType()
+          .mapFromDatabaseResponse(data['${effectivePrefix}admin1']),
+      admin2: const StringType()
+          .mapFromDatabaseResponse(data['${effectivePrefix}admin2']),
+    );
+  }
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    map['account_file'] = Variable<int>(accountFile);
+    map['version'] = Variable<int>(version);
+    if (!nullToAbsent || name != null) {
+      map['name'] = Variable<String?>(name);
+    }
+    if (!nullToAbsent || latitude != null) {
+      map['latitude'] = Variable<double?>(latitude);
+    }
+    if (!nullToAbsent || longitude != null) {
+      map['longitude'] = Variable<double?>(longitude);
+    }
+    if (!nullToAbsent || countryCode != null) {
+      map['country_code'] = Variable<String?>(countryCode);
+    }
+    if (!nullToAbsent || admin1 != null) {
+      map['admin1'] = Variable<String?>(admin1);
+    }
+    if (!nullToAbsent || admin2 != null) {
+      map['admin2'] = Variable<String?>(admin2);
+    }
+    return map;
+  }
+
+  ImageLocationsCompanion toCompanion(bool nullToAbsent) {
+    return ImageLocationsCompanion(
+      accountFile: Value(accountFile),
+      version: Value(version),
+      name: name == null && nullToAbsent ? const Value.absent() : Value(name),
+      latitude: latitude == null && nullToAbsent
+          ? const Value.absent()
+          : Value(latitude),
+      longitude: longitude == null && nullToAbsent
+          ? const Value.absent()
+          : Value(longitude),
+      countryCode: countryCode == null && nullToAbsent
+          ? const Value.absent()
+          : Value(countryCode),
+      admin1:
+          admin1 == null && nullToAbsent ? const Value.absent() : Value(admin1),
+      admin2:
+          admin2 == null && nullToAbsent ? const Value.absent() : Value(admin2),
+    );
+  }
+
+  factory ImageLocation.fromJson(Map<String, dynamic> json,
+      {ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return ImageLocation(
+      accountFile: serializer.fromJson<int>(json['accountFile']),
+      version: serializer.fromJson<int>(json['version']),
+      name: serializer.fromJson<String?>(json['name']),
+      latitude: serializer.fromJson<double?>(json['latitude']),
+      longitude: serializer.fromJson<double?>(json['longitude']),
+      countryCode: serializer.fromJson<String?>(json['countryCode']),
+      admin1: serializer.fromJson<String?>(json['admin1']),
+      admin2: serializer.fromJson<String?>(json['admin2']),
+    );
+  }
+  @override
+  Map<String, dynamic> toJson({ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return <String, dynamic>{
+      'accountFile': serializer.toJson<int>(accountFile),
+      'version': serializer.toJson<int>(version),
+      'name': serializer.toJson<String?>(name),
+      'latitude': serializer.toJson<double?>(latitude),
+      'longitude': serializer.toJson<double?>(longitude),
+      'countryCode': serializer.toJson<String?>(countryCode),
+      'admin1': serializer.toJson<String?>(admin1),
+      'admin2': serializer.toJson<String?>(admin2),
+    };
+  }
+
+  ImageLocation copyWith(
+          {int? accountFile,
+          int? version,
+          Value<String?> name = const Value.absent(),
+          Value<double?> latitude = const Value.absent(),
+          Value<double?> longitude = const Value.absent(),
+          Value<String?> countryCode = const Value.absent(),
+          Value<String?> admin1 = const Value.absent(),
+          Value<String?> admin2 = const Value.absent()}) =>
+      ImageLocation(
+        accountFile: accountFile ?? this.accountFile,
+        version: version ?? this.version,
+        name: name.present ? name.value : this.name,
+        latitude: latitude.present ? latitude.value : this.latitude,
+        longitude: longitude.present ? longitude.value : this.longitude,
+        countryCode: countryCode.present ? countryCode.value : this.countryCode,
+        admin1: admin1.present ? admin1.value : this.admin1,
+        admin2: admin2.present ? admin2.value : this.admin2,
+      );
+  @override
+  String toString() {
+    return (StringBuffer('ImageLocation(')
+          ..write('accountFile: $accountFile, ')
+          ..write('version: $version, ')
+          ..write('name: $name, ')
+          ..write('latitude: $latitude, ')
+          ..write('longitude: $longitude, ')
+          ..write('countryCode: $countryCode, ')
+          ..write('admin1: $admin1, ')
+          ..write('admin2: $admin2')
+          ..write(')'))
+        .toString();
+  }
+
+  @override
+  int get hashCode => Object.hash(accountFile, version, name, latitude,
+      longitude, countryCode, admin1, admin2);
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      (other is ImageLocation &&
+          other.accountFile == this.accountFile &&
+          other.version == this.version &&
+          other.name == this.name &&
+          other.latitude == this.latitude &&
+          other.longitude == this.longitude &&
+          other.countryCode == this.countryCode &&
+          other.admin1 == this.admin1 &&
+          other.admin2 == this.admin2);
+}
+
+class ImageLocationsCompanion extends UpdateCompanion<ImageLocation> {
+  final Value<int> accountFile;
+  final Value<int> version;
+  final Value<String?> name;
+  final Value<double?> latitude;
+  final Value<double?> longitude;
+  final Value<String?> countryCode;
+  final Value<String?> admin1;
+  final Value<String?> admin2;
+  const ImageLocationsCompanion({
+    this.accountFile = const Value.absent(),
+    this.version = const Value.absent(),
+    this.name = const Value.absent(),
+    this.latitude = const Value.absent(),
+    this.longitude = const Value.absent(),
+    this.countryCode = const Value.absent(),
+    this.admin1 = const Value.absent(),
+    this.admin2 = const Value.absent(),
+  });
+  ImageLocationsCompanion.insert({
+    this.accountFile = const Value.absent(),
+    required int version,
+    this.name = const Value.absent(),
+    this.latitude = const Value.absent(),
+    this.longitude = const Value.absent(),
+    this.countryCode = const Value.absent(),
+    this.admin1 = const Value.absent(),
+    this.admin2 = const Value.absent(),
+  }) : version = Value(version);
+  static Insertable<ImageLocation> custom({
+    Expression<int>? accountFile,
+    Expression<int>? version,
+    Expression<String?>? name,
+    Expression<double?>? latitude,
+    Expression<double?>? longitude,
+    Expression<String?>? countryCode,
+    Expression<String?>? admin1,
+    Expression<String?>? admin2,
+  }) {
+    return RawValuesInsertable({
+      if (accountFile != null) 'account_file': accountFile,
+      if (version != null) 'version': version,
+      if (name != null) 'name': name,
+      if (latitude != null) 'latitude': latitude,
+      if (longitude != null) 'longitude': longitude,
+      if (countryCode != null) 'country_code': countryCode,
+      if (admin1 != null) 'admin1': admin1,
+      if (admin2 != null) 'admin2': admin2,
+    });
+  }
+
+  ImageLocationsCompanion copyWith(
+      {Value<int>? accountFile,
+      Value<int>? version,
+      Value<String?>? name,
+      Value<double?>? latitude,
+      Value<double?>? longitude,
+      Value<String?>? countryCode,
+      Value<String?>? admin1,
+      Value<String?>? admin2}) {
+    return ImageLocationsCompanion(
+      accountFile: accountFile ?? this.accountFile,
+      version: version ?? this.version,
+      name: name ?? this.name,
+      latitude: latitude ?? this.latitude,
+      longitude: longitude ?? this.longitude,
+      countryCode: countryCode ?? this.countryCode,
+      admin1: admin1 ?? this.admin1,
+      admin2: admin2 ?? this.admin2,
+    );
+  }
+
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    if (accountFile.present) {
+      map['account_file'] = Variable<int>(accountFile.value);
+    }
+    if (version.present) {
+      map['version'] = Variable<int>(version.value);
+    }
+    if (name.present) {
+      map['name'] = Variable<String?>(name.value);
+    }
+    if (latitude.present) {
+      map['latitude'] = Variable<double?>(latitude.value);
+    }
+    if (longitude.present) {
+      map['longitude'] = Variable<double?>(longitude.value);
+    }
+    if (countryCode.present) {
+      map['country_code'] = Variable<String?>(countryCode.value);
+    }
+    if (admin1.present) {
+      map['admin1'] = Variable<String?>(admin1.value);
+    }
+    if (admin2.present) {
+      map['admin2'] = Variable<String?>(admin2.value);
+    }
+    return map;
+  }
+
+  @override
+  String toString() {
+    return (StringBuffer('ImageLocationsCompanion(')
+          ..write('accountFile: $accountFile, ')
+          ..write('version: $version, ')
+          ..write('name: $name, ')
+          ..write('latitude: $latitude, ')
+          ..write('longitude: $longitude, ')
+          ..write('countryCode: $countryCode, ')
+          ..write('admin1: $admin1, ')
+          ..write('admin2: $admin2')
+          ..write(')'))
+        .toString();
+  }
+}
+
+class $ImageLocationsTable extends ImageLocations
+    with TableInfo<$ImageLocationsTable, ImageLocation> {
+  @override
+  final GeneratedDatabase attachedDatabase;
+  final String? _alias;
+  $ImageLocationsTable(this.attachedDatabase, [this._alias]);
+  final VerificationMeta _accountFileMeta =
+      const VerificationMeta('accountFile');
+  @override
+  late final GeneratedColumn<int?> accountFile = GeneratedColumn<int?>(
+      'account_file', aliasedName, false,
+      type: const IntType(),
+      requiredDuringInsert: false,
+      defaultConstraints:
+          'REFERENCES account_files (row_id) ON DELETE CASCADE');
+  final VerificationMeta _versionMeta = const VerificationMeta('version');
+  @override
+  late final GeneratedColumn<int?> version = GeneratedColumn<int?>(
+      'version', aliasedName, false,
+      type: const IntType(), requiredDuringInsert: true);
+  final VerificationMeta _nameMeta = const VerificationMeta('name');
+  @override
+  late final GeneratedColumn<String?> name = GeneratedColumn<String?>(
+      'name', aliasedName, true,
+      type: const StringType(), requiredDuringInsert: false);
+  final VerificationMeta _latitudeMeta = const VerificationMeta('latitude');
+  @override
+  late final GeneratedColumn<double?> latitude = GeneratedColumn<double?>(
+      'latitude', aliasedName, true,
+      type: const RealType(), requiredDuringInsert: false);
+  final VerificationMeta _longitudeMeta = const VerificationMeta('longitude');
+  @override
+  late final GeneratedColumn<double?> longitude = GeneratedColumn<double?>(
+      'longitude', aliasedName, true,
+      type: const RealType(), requiredDuringInsert: false);
+  final VerificationMeta _countryCodeMeta =
+      const VerificationMeta('countryCode');
+  @override
+  late final GeneratedColumn<String?> countryCode = GeneratedColumn<String?>(
+      'country_code', aliasedName, true,
+      type: const StringType(), requiredDuringInsert: false);
+  final VerificationMeta _admin1Meta = const VerificationMeta('admin1');
+  @override
+  late final GeneratedColumn<String?> admin1 = GeneratedColumn<String?>(
+      'admin1', aliasedName, true,
+      type: const StringType(), requiredDuringInsert: false);
+  final VerificationMeta _admin2Meta = const VerificationMeta('admin2');
+  @override
+  late final GeneratedColumn<String?> admin2 = GeneratedColumn<String?>(
+      'admin2', aliasedName, true,
+      type: const StringType(), requiredDuringInsert: false);
+  @override
+  List<GeneratedColumn> get $columns => [
+        accountFile,
+        version,
+        name,
+        latitude,
+        longitude,
+        countryCode,
+        admin1,
+        admin2
+      ];
+  @override
+  String get aliasedName => _alias ?? 'image_locations';
+  @override
+  String get actualTableName => 'image_locations';
+  @override
+  VerificationContext validateIntegrity(Insertable<ImageLocation> instance,
+      {bool isInserting = false}) {
+    final context = VerificationContext();
+    final data = instance.toColumns(true);
+    if (data.containsKey('account_file')) {
+      context.handle(
+          _accountFileMeta,
+          accountFile.isAcceptableOrUnknown(
+              data['account_file']!, _accountFileMeta));
+    }
+    if (data.containsKey('version')) {
+      context.handle(_versionMeta,
+          version.isAcceptableOrUnknown(data['version']!, _versionMeta));
+    } else if (isInserting) {
+      context.missing(_versionMeta);
+    }
+    if (data.containsKey('name')) {
+      context.handle(
+          _nameMeta, name.isAcceptableOrUnknown(data['name']!, _nameMeta));
+    }
+    if (data.containsKey('latitude')) {
+      context.handle(_latitudeMeta,
+          latitude.isAcceptableOrUnknown(data['latitude']!, _latitudeMeta));
+    }
+    if (data.containsKey('longitude')) {
+      context.handle(_longitudeMeta,
+          longitude.isAcceptableOrUnknown(data['longitude']!, _longitudeMeta));
+    }
+    if (data.containsKey('country_code')) {
+      context.handle(
+          _countryCodeMeta,
+          countryCode.isAcceptableOrUnknown(
+              data['country_code']!, _countryCodeMeta));
+    }
+    if (data.containsKey('admin1')) {
+      context.handle(_admin1Meta,
+          admin1.isAcceptableOrUnknown(data['admin1']!, _admin1Meta));
+    }
+    if (data.containsKey('admin2')) {
+      context.handle(_admin2Meta,
+          admin2.isAcceptableOrUnknown(data['admin2']!, _admin2Meta));
+    }
+    return context;
+  }
+
+  @override
+  Set<GeneratedColumn> get $primaryKey => {accountFile};
+  @override
+  ImageLocation map(Map<String, dynamic> data, {String? tablePrefix}) {
+    return ImageLocation.fromData(data,
+        prefix: tablePrefix != null ? '$tablePrefix.' : null);
+  }
+
+  @override
+  $ImageLocationsTable createAlias(String alias) {
+    return $ImageLocationsTable(attachedDatabase, alias);
+  }
+}
+
 class Trash extends DataClass implements Insertable<Trash> {
  final int file;
  final String filename;
@ -3717,6 +4127,7 @@ abstract class _$SqliteDb extends GeneratedDatabase {
  late final $FilesTable files = $FilesTable(this);
  late final $AccountFilesTable accountFiles = $AccountFilesTable(this);
  late final $ImagesTable images = $ImagesTable(this);
+  late final $ImageLocationsTable imageLocations = $ImageLocationsTable(this);
  late final $TrashesTable trashes = $TrashesTable(this);
  late final $DirFilesTable dirFiles = $DirFilesTable(this);
  late final $AlbumsTable albums = $AlbumsTable(this);
@ -3732,6 +4143,7 @@ abstract class _$SqliteDb extends GeneratedDatabase {
        files,
        accountFiles,
        images,
+        imageLocations,
        trashes,
        dirFiles,
        albums,
--- a/app/lib/entity/sqlite_table_converter.dart
+++ b/app/lib/entity/sqlite_table_converter.dart
@ -115,6 +115,15 @@ class SqliteFileConverter {
          imageHeight: obj.height,
          exif: obj.exifRaw?.run((e) => Exif.fromJson(jsonDecode(e))),
        ));
+    final location = f.imageLocation?.run((obj) => ImageLocation(
+          version: obj.version,
+          name: obj.name,
+          latitude: obj.latitude,
+          longitude: obj.longitude,
+          countryCode: obj.countryCode,
+          admin1: obj.admin1,
+          admin2: obj.admin2,
+        ));
    return File(
      path: "remote.php/dav/files/$userId/${f.accountFile.relativePath}",
      contentLength: f.file.contentLength,
@ -134,6 +143,7 @@ class SqliteFileConverter {
      metadata: metadata,
      isArchived: f.accountFile.isArchived,
      overrideDateTime: f.accountFile.overrideDateTime,
+      location: location,
    );
  }

@ -167,6 +177,16 @@ class SqliteFileConverter {
          exifRaw: Value(m.exif?.toJson().run((j) => jsonEncode(j))),
          dateTimeOriginal: Value(m.exif?.dateTimeOriginal),
        ));
+    final dbImageLocation =
+        file.location?.run((l) => sql.ImageLocationsCompanion.insert(
+              version: l.version,
+              name: Value(l.name),
+              latitude: Value(l.latitude),
+              longitude: Value(l.longitude),
+              countryCode: Value(l.countryCode),
+              admin1: Value(l.admin1),
+              admin2: Value(l.admin2),
+            ));
    final dbTrash = file.trashbinDeletionTime == null
        ? null
        : sql.TrashesCompanion.insert(
@ -174,7 +194,8 @@ class SqliteFileConverter {
            originalLocation: file.trashbinOriginalLocation!,
            deletionTime: file.trashbinDeletionTime!,
          );
-    return sql.CompleteFileCompanion(dbFile, dbAccountFile, dbImage, dbTrash);
+    return sql.CompleteFileCompanion(
+        dbFile, dbAccountFile, dbImage, dbImageLocation, dbTrash);
  }
 }

--- a/app/lib/entity/sqlite_table_extension.dart
+++ b/app/lib/entity/sqlite_table_extension.dart
@ -16,21 +16,24 @@ import 'package:nc_photos/platform/k.dart' as platform_k;
 const maxByFileIdsSize = 30000;

 class CompleteFile {
-  const CompleteFile(this.file, this.accountFile, this.image, this.trash);
+  const CompleteFile(
+      this.file, this.accountFile, this.image, this.imageLocation, this.trash);

  final File file;
  final AccountFile accountFile;
  final Image? image;
+  final ImageLocation? imageLocation;
  final Trash? trash;
 }

 class CompleteFileCompanion {
  const CompleteFileCompanion(
-      this.file, this.accountFile, this.image, this.trash);
+      this.file, this.accountFile, this.image, this.imageLocation, this.trash);

  final FilesCompanion file;
  final AccountFilesCompanion accountFile;
  final ImagesCompanion? image;
+  final ImageLocationsCompanion? imageLocation;
  final TrashesCompanion? trash;
 }

@ -347,6 +350,7 @@ extension SqliteDbExtension on SqliteDb {
                r.readTable(files),
                r.readTable(accountFiles),
                r.readTableOrNull(images),
+                r.readTableOrNull(imageLocations),
                r.readTableOrNull(trashes),
              ))
          .get();
@ -374,6 +378,7 @@ extension SqliteDbExtension on SqliteDb {
              r.readTable(files),
              r.readTable(accountFiles),
              r.readTableOrNull(images),
+              r.readTableOrNull(imageLocations),
              r.readTableOrNull(trashes),
            ))
        .get();
@ -400,6 +405,7 @@ extension SqliteDbExtension on SqliteDb {
              r.readTable(files),
              r.readTable(accountFiles),
              r.readTableOrNull(images),
+              r.readTableOrNull(imageLocations),
              r.readTableOrNull(trashes),
            ))
        .get();
@ -454,6 +460,7 @@ extension SqliteDbExtension on SqliteDb {
    await delete(accounts).go();
    await delete(files).go();
    await delete(images).go();
+    await delete(imageLocations).go();
    await delete(trashes).go();
    await delete(accountFiles).go();
    await delete(dirFiles).go();
@ -571,6 +578,8 @@ class FilesQueryBuilder {
      if (_queryMode == FilesQueryMode.completeFile) ...[
        leftOuterJoin(
            db.images, db.images.accountFile.equalsExp(db.accountFiles.rowId)),
+        leftOuterJoin(db.imageLocations,
+            db.imageLocations.accountFile.equalsExp(db.accountFiles.rowId)),
        leftOuterJoin(db.trashes, db.trashes.file.equalsExp(db.files.rowId)),
      ],
    ]) as JoinedSelectStatement;
--- a/app/lib/entity/webdav_response_parser.dart
+++ b/app/lib/entity/webdav_response_parser.dart
@ -101,6 +101,7 @@ class WebdavResponseParser {
    String? trashbinFilename;
    String? trashbinOriginalLocation;
    DateTime? trashbinDeletionTime;
+    ImageLocation? location;

    for (final child in element.children.whereType<XmlElement>()) {
      if (child.matchQualifiedName("href",
@ -139,6 +140,7 @@ class WebdavResponseParser {
        trashbinFilename = propParser.trashbinFilename;
        trashbinOriginalLocation = propParser.trashbinOriginalLocation;
        trashbinDeletionTime = propParser.trashbinDeletionTime;
+        location = propParser.location;
      }
    }

@ -161,6 +163,7 @@ class WebdavResponseParser {
      trashbinFilename: trashbinFilename,
      trashbinOriginalLocation: trashbinOriginalLocation,
      trashbinDeletionTime: trashbinDeletionTime,
+      location: location,
    );
  }

@ -357,6 +360,9 @@ class _FilePropParser {
      } else if (child.matchQualifiedName("override-date-time",
          prefix: "com.nkming.nc_photos", namespaces: namespaces)) {
        _overrideDateTime = DateTime.parse(child.innerText);
+      } else if (child.matchQualifiedName("location",
+          prefix: "com.nkming.nc_photos", namespaces: namespaces)) {
+        _location = ImageLocation.fromJson(jsonDecode(child.innerText));
      }
    }
    // 2nd pass that depends on data in 1st pass
@ -395,6 +401,7 @@ class _FilePropParser {
  String? get trashbinFilename => _trashbinFilename;
  String? get trashbinOriginalLocation => _trashbinOriginalLocation;
  DateTime? get trashbinDeletionTime => _trashbinDeletionTime;
+  ImageLocation? get location => _location;

  final Map<String, String> namespaces;

@ -418,6 +425,7 @@ class _FilePropParser {
  String? _trashbinFilename;
  String? _trashbinOriginalLocation;
  DateTime? _trashbinDeletionTime;
+  ImageLocation? _location;
 }

 class _FileIdPropParser {
--- a/app/lib/event/event.dart
+++ b/app/lib/event/event.dart
@ -71,6 +71,7 @@ class FilePropertyUpdatedEvent {
  static const propIsArchived = 0x02;
  static const propOverrideDateTime = 0x04;
  static const propFavorite = 0x08;
+  static const propImageLocation = 0x10;
 }

 class FileRemovedEvent {
--- a/app/lib/l10n/app_en.arb
+++ b/app/lib/l10n/app_en.arb
@ -1374,6 +1374,25 @@
 	"@showAllButtonLabel": {
 		"description": "A button to show all items of a certain item group (e.g., show all recognized faces)"
 	},
+	"gpsPlaceText": "Near {place}",
+	"@gpsPlaceText": {
+		"description": "The estimated place where a photo was taken at. The place could be a town, a city, an administrative region, or a country.",
+		"placeholders": {
+			"place": {}
+		}
+	},
+	"gpsPlaceAboutDialogTitle": "About place",
+	"@gpsPlaceAboutDialogTitle": {
+		"description": "Warn about the inaccurate nature of our offline reverse geocoding feature (i.e., converting coordinates into addresses)"
+	},
+	"gpsPlaceAboutDialogContent": "The place shown here is only a rough estimation and not guaranteed to be accurate. It does not represent our views on any disputed areas.",
+	"@gpsPlaceAboutDialogContent": {
+		"description": "Warn about the inaccurate nature of our offline reverse geocoding feature (i.e., converting coordinates into addresses)"
+	},
+	"collectionPlacesLabel": "Places",
+	"@collectionPlacesLabel": {
+		"description": "Browse photos grouped by place"
+	},

 	"errorUnauthenticated": "Unauthenticated access. Please sign-in again if the problem continues",
 	"@errorUnauthenticated": {
--- a/app/lib/l10n/untranslated-messages.txt
+++ b/app/lib/l10n/untranslated-messages.txt
@ -143,6 +143,10 @@
    "searchFilterBubbleFavoriteTrueText",
    "searchFilterBubbleFavoriteFalseText",
    "showAllButtonLabel",
+    "gpsPlaceText",
+    "gpsPlaceAboutDialogTitle",
+    "gpsPlaceAboutDialogContent",
+    "collectionPlacesLabel",
    "errorAlbumDowngrade"
  ],

@ -304,6 +308,10 @@
    "searchFilterBubbleFavoriteTrueText",
    "searchFilterBubbleFavoriteFalseText",
    "showAllButtonLabel",
+    "gpsPlaceText",
+    "gpsPlaceAboutDialogTitle",
+    "gpsPlaceAboutDialogContent",
+    "collectionPlacesLabel",
    "errorAlbumDowngrade"
  ],

@ -345,13 +353,28 @@
    "searchFilterFavoriteLabel",
    "searchFilterBubbleFavoriteTrueText",
    "searchFilterBubbleFavoriteFalseText",
-    "showAllButtonLabel"
+    "showAllButtonLabel",
+    "gpsPlaceText",
+    "gpsPlaceAboutDialogTitle",
+    "gpsPlaceAboutDialogContent",
+    "collectionPlacesLabel"
  ],

  "es": [
    "settingsLanguageOptionSystemDefaultLabel",
    "rootPickerSkipConfirmationDialogContent2",
-    "showAllButtonLabel"
+    "showAllButtonLabel",
+    "gpsPlaceText",
+    "gpsPlaceAboutDialogTitle",
+    "gpsPlaceAboutDialogContent",
+    "collectionPlacesLabel"
+  ],
+
+  "fi": [
+    "gpsPlaceText",
+    "gpsPlaceAboutDialogTitle",
+    "gpsPlaceAboutDialogContent",
+    "collectionPlacesLabel"
  ],

  "fr": [
@ -417,7 +440,11 @@
    "searchFilterFavoriteLabel",
    "searchFilterBubbleFavoriteTrueText",
    "searchFilterBubbleFavoriteFalseText",
-    "showAllButtonLabel"
+    "showAllButtonLabel",
+    "gpsPlaceText",
+    "gpsPlaceAboutDialogTitle",
+    "gpsPlaceAboutDialogContent",
+    "collectionPlacesLabel"
  ],

  "pl": [
@ -500,7 +527,11 @@
    "searchFilterFavoriteLabel",
    "searchFilterBubbleFavoriteTrueText",
    "searchFilterBubbleFavoriteFalseText",
-    "showAllButtonLabel"
+    "showAllButtonLabel",
+    "gpsPlaceText",
+    "gpsPlaceAboutDialogTitle",
+    "gpsPlaceAboutDialogContent",
+    "collectionPlacesLabel"
  ],

  "pt": [
@ -562,7 +593,11 @@
    "searchFilterFavoriteLabel",
    "searchFilterBubbleFavoriteTrueText",
    "searchFilterBubbleFavoriteFalseText",
-    "showAllButtonLabel"
+    "showAllButtonLabel",
+    "gpsPlaceText",
+    "gpsPlaceAboutDialogTitle",
+    "gpsPlaceAboutDialogContent",
+    "collectionPlacesLabel"
  ],

  "ru": [
@ -624,7 +659,11 @@
    "searchFilterFavoriteLabel",
    "searchFilterBubbleFavoriteTrueText",
    "searchFilterBubbleFavoriteFalseText",
-    "showAllButtonLabel"
+    "showAllButtonLabel",
+    "gpsPlaceText",
+    "gpsPlaceAboutDialogTitle",
+    "gpsPlaceAboutDialogContent",
+    "collectionPlacesLabel"
  ],

  "zh": [
@ -686,7 +725,11 @@
    "searchFilterFavoriteLabel",
    "searchFilterBubbleFavoriteTrueText",
    "searchFilterBubbleFavoriteFalseText",
-    "showAllButtonLabel"
+    "showAllButtonLabel",
+    "gpsPlaceText",
+    "gpsPlaceAboutDialogTitle",
+    "gpsPlaceAboutDialogContent",
+    "collectionPlacesLabel"
  ],

  "zh_Hant": [
@ -748,6 +791,10 @@
    "searchFilterFavoriteLabel",
    "searchFilterBubbleFavoriteTrueText",
    "searchFilterBubbleFavoriteFalseText",
-    "showAllButtonLabel"
+    "showAllButtonLabel",
+    "gpsPlaceText",
+    "gpsPlaceAboutDialogTitle",
+    "gpsPlaceAboutDialogContent",
+    "collectionPlacesLabel"
  ]
 }
--- a/app/lib/location_util.dart
+++ b/app/lib/location_util.dart
@ -0,0 +1,254 @@
+/// Convert a ISO 3166-1 alpha-2 code into country name
+String? alpha2CodeToName(String cc) => _ccMap[cc];
+
+const _ccMap = {
+  "AD": "Andorra",
+  "AE": "United Arab Emirates",
+  "AF": "Afghanistan",
+  "AG": "Antigua and Barbuda",
+  "AI": "Anguilla",
+  "AL": "Albania",
+  "AM": "Armenia",
+  "AO": "Angola",
+  "AQ": "Antarctica",
+  "AR": "Argentina",
+  "AS": "American Samoa",
+  "AT": "Austria",
+  "AU": "Australia",
+  "AW": "Aruba",
+  "AX": "Åland Islands",
+  "AZ": "Azerbaijan",
+  "BA": "Bosnia and Herzegovina",
+  "BB": "Barbados",
+  "BD": "Bangladesh",
+  "BE": "Belgium",
+  "BF": "Burkina Faso",
+  "BG": "Bulgaria",
+  "BH": "Bahrain",
+  "BI": "Burundi",
+  "BJ": "Benin",
+  "BL": "Saint Barthélemy",
+  "BM": "Bermuda",
+  "BN": "Brunei Darussalam",
+  "BO": "Bolivia",
+  "BQ": "Bonaire, Sint Eustatius and Saba",
+  "BR": "Brazil",
+  "BS": "Bahamas",
+  "BT": "Bhutan",
+  "BV": "Bouvet Island",
+  "BW": "Botswana",
+  "BY": "Belarus",
+  "BZ": "Belize",
+  "CA": "Canada",
+  "CC": "Cocos (Keeling) Islands",
+  "CD": "DR Congo",
+  "CF": "Central African Republic",
+  "CG": "Congo",
+  "CH": "Switzerland",
+  "CI": "Ivory Coast",
+  "CK": "Cook Islands",
+  "CL": "Chile",
+  "CM": "Cameroon",
+  "CN": "China",
+  "CO": "Colombia",
+  "CR": "Costa Rica",
+  "CU": "Cuba",
+  "CV": "Cabo Verde",
+  "CW": "Curaçao",
+  "CX": "Christmas Island",
+  "CY": "Cyprus",
+  "CZ": "Czechia",
+  "DE": "Germany",
+  "DJ": "Djibouti",
+  "DK": "Denmark",
+  "DM": "Dominica",
+  "DO": "Dominican Republic",
+  "DZ": "Algeria",
+  "EC": "Ecuador",
+  "EE": "Estonia",
+  "EG": "Egypt",
+  "EH": "Western Sahara",
+  "ER": "Eritrea",
+  "ES": "Spain",
+  "ET": "Ethiopia",
+  "FI": "Finland",
+  "FJ": "Fiji",
+  "FK": "Falkland Islands (Malvinas)",
+  "FM": "Micronesia",
+  "FO": "Faroe Islands",
+  "FR": "France",
+  "GA": "Gabon",
+  "GB": "United Kingdom",
+  "GD": "Grenada",
+  "GE": "Georgia",
+  "GF": "French Guiana",
+  "GG": "Guernsey",
+  "GH": "Ghana",
+  "GI": "Gibraltar",
+  "GL": "Greenland",
+  "GM": "Gambia",
+  "GN": "Guinea",
+  "GP": "Guadeloupe",
+  "GQ": "Equatorial Guinea",
+  "GR": "Greece",
+  "GS": "South Georgia and the South Sandwich Islands",
+  "GT": "Guatemala",
+  "GU": "Guam",
+  "GW": "Guinea-Bissau",
+  "GY": "Guyana",
+  "HK": "Hong Kong",
+  "HM": "Heard Island and McDonald Islands",
+  "HN": "Honduras",
+  "HR": "Croatia",
+  "HT": "Haiti",
+  "HU": "Hungary",
+  "ID": "Indonesia",
+  "IE": "Ireland",
+  "IL": "Israel",
+  "IM": "Isle of Man",
+  "IN": "India",
+  "IO": "British Indian Ocean Territory",
+  "IQ": "Iraq",
+  "IR": "Iran",
+  "IS": "Iceland",
+  "IT": "Italy",
+  "JE": "Jersey",
+  "JM": "Jamaica",
+  "JO": "Jordan",
+  "JP": "Japan",
+  "KE": "Kenya",
+  "KG": "Kyrgyzstan",
+  "KH": "Cambodia",
+  "KI": "Kiribati",
+  "KM": "Comoros",
+  "KN": "Saint Kitts and Nevis",
+  "KP": "North Korea",
+  "KR": "South Korea",
+  "KW": "Kuwait",
+  "KY": "Cayman Islands",
+  "KZ": "Kazakhstan",
+  "LA": "Laos",
+  "LB": "Lebanon",
+  "LC": "Saint Lucia",
+  "LI": "Liechtenstein",
+  "LK": "Sri Lanka",
+  "LR": "Liberia",
+  "LS": "Lesotho",
+  "LT": "Lithuania",
+  "LU": "Luxembourg",
+  "LV": "Latvia",
+  "LY": "Libya",
+  "MA": "Morocco",
+  "MC": "Monaco",
+  "MD": "Moldova",
+  "ME": "Montenegro",
+  "MF": "Saint Martin",
+  "MG": "Madagascar",
+  "MH": "Marshall Islands",
+  "MK": "North Macedonia",
+  "ML": "Mali",
+  "MM": "Myanmar",
+  "MN": "Mongolia",
+  "MO": "Macau",
+  "MP": "Northern Mariana Islands",
+  "MQ": "Martinique",
+  "MR": "Mauritania",
+  "MS": "Montserrat",
+  "MT": "Malta",
+  "MU": "Mauritius",
+  "MV": "Maldives",
+  "MW": "Malawi",
+  "MX": "Mexico",
+  "MY": "Malaysia",
+  "MZ": "Mozambique",
+  "NA": "Namibia",
+  "NC": "New Caledonia",
+  "NE": "Niger",
+  "NF": "Norfolk Island",
+  "NG": "Nigeria",
+  "NI": "Nicaragua",
+  "NL": "Netherlands",
+  "NO": "Norway",
+  "NP": "Nepal",
+  "NR": "Nauru",
+  "NU": "Niue",
+  "NZ": "New Zealand",
+  "OM": "Oman",
+  "PA": "Panama",
+  "PE": "Peru",
+  "PF": "French Polynesia",
+  "PG": "Papua New Guinea",
+  "PH": "Philippines",
+  "PK": "Pakistan",
+  "PL": "Poland",
+  "PM": "Saint Pierre and Miquelon",
+  "PN": "Pitcairn",
+  "PR": "Puerto Rico",
+  "PS": "Palestine",
+  "PT": "Portugal",
+  "PW": "Palau",
+  "PY": "Paraguay",
+  "QA": "Qatar",
+  "RE": "Réunion",
+  "RO": "Romania",
+  "RS": "Serbia",
+  "RU": "Russia",
+  "RW": "Rwanda",
+  "SA": "Saudi Arabia",
+  "SB": "Solomon Islands",
+  "SC": "Seychelles",
+  "SD": "Sudan",
+  "SE": "Sweden",
+  "SG": "Singapore",
+  "SH": "Saint Helena, Ascension and Tristan da Cunha",
+  "SI": "Slovenia",
+  "SJ": "Svalbard and Jan Mayen",
+  "SK": "Slovakia",
+  "SL": "Sierra Leone",
+  "SM": "San Marino",
+  "SN": "Senegal",
+  "SO": "Somalia",
+  "SR": "Suriname",
+  "SS": "South Sudan",
+  "ST": "Sao Tome and Principe",
+  "SV": "El Salvador",
+  "SX": "Sint Maarten",
+  "SY": "Syria",
+  "SZ": "Eswatini",
+  "TC": "Turks and Caicos Islands",
+  "TD": "Chad",
+  "TF": "French Southern Territories",
+  "TG": "Togo",
+  "TH": "Thailand",
+  "TJ": "Tajikistan",
+  "TK": "Tokelau",
+  "TL": "Timor-Leste",
+  "TM": "Turkmenistan",
+  "TN": "Tunisia",
+  "TO": "Tonga",
+  "TR": "Türkiye",
+  "TT": "Trinidad and Tobago",
+  "TV": "Tuvalu",
+  "TW": "Taiwan",
+  "TZ": "Tanzania",
+  "UA": "Ukraine",
+  "UG": "Uganda",
+  "UM": "United States Minor Outlying Islands",
+  "US": "United States",
+  "UY": "Uruguay",
+  "UZ": "Uzbekistan",
+  "VA": "Holy See",
+  "VC": "Saint Vincent and the Grenadines",
+  "VE": "Venezuela",
+  "VG": "Virgin Islands (British)",
+  "VI": "Virgin Islands (U.S.)",
+  "VN": "Viet Nam",
+  "VU": "Vanuatu",
+  "WF": "Wallis and Futuna",
+  "WS": "Samoa",
+  "YE": "Yemen",
+  "YT": "Mayotte",
+  "ZA": "South Africa",
+  "ZM": "Zambia",
+  "ZW": "Zimbabwe",
+};
--- a/app/lib/metadata_task_manager.dart
+++ b/app/lib/metadata_task_manager.dart
@ -9,6 +9,7 @@ import 'package:nc_photos/entity/file.dart';
 import 'package:nc_photos/entity/file_util.dart' as file_util;
 import 'package:nc_photos/event/event.dart';
 import 'package:nc_photos/pref.dart';
+import 'package:nc_photos/reverse_geocoder.dart';
 import 'package:nc_photos/use_case/update_missing_metadata.dart';

 /// Task to update metadata for missing files
@ -29,11 +30,13 @@ class MetadataTask {
      final shareFolder =
          File(path: file_util.unstripPath(account, pref.getShareFolderOr()));
      bool hasScanShareFolder = false;
+      final geocoder = ReverseGeocoder();
+      await geocoder.init();
      for (final r in account.roots) {
        final dir = File(path: file_util.unstripPath(account, r));
        hasScanShareFolder |= file_util.isOrUnderDir(shareFolder, dir);
-        final op = UpdateMissingMetadata(
-            _c.fileRepo, const _UpdateMissingMetadataConfigProvider());
+        final op = UpdateMissingMetadata(_c.fileRepo,
+            const _UpdateMissingMetadataConfigProvider(), geocoder);
        await for (final _ in op(account, dir)) {
          if (!Pref().isEnableExifOr()) {
            _log.info("[call] EXIF disabled, task ending immaturely");
@ -43,8 +46,8 @@ class MetadataTask {
        }
      }
      if (!hasScanShareFolder) {
-        final op = UpdateMissingMetadata(
-            _c.fileRepo, const _UpdateMissingMetadataConfigProvider());
+        final op = UpdateMissingMetadata(_c.fileRepo,
+            const _UpdateMissingMetadataConfigProvider(), geocoder);
        await for (final _ in op(
          account,
          shareFolder,
--- a/app/lib/mobile/db_util.dart
+++ b/app/lib/mobile/db_util.dart
@ -2,9 +2,11 @@ import 'dart:io' as dart;

 import 'package:drift/drift.dart';
 import 'package:drift/native.dart';
+import 'package:flutter/services.dart' show rootBundle;
 import 'package:path/path.dart' as path_lib;
 import 'package:path_provider/path_provider.dart';
-import 'package:sqlite3_flutter_libs/sqlite3_flutter_libs.dart' as sqlite3;
+import 'package:sqlite3/sqlite3.dart';
+import 'package:sqlite3_flutter_libs/sqlite3_flutter_libs.dart' as sql;

 Future<Map<String, dynamic>> getSqliteConnectionArgs() async {
  // put the database file, called db.sqlite here, into the documents folder
@ -32,5 +34,27 @@ QueryExecutor openSqliteConnection() {
 }

 Future<void> applyWorkaroundToOpenSqlite3OnOldAndroidVersions() {
-  return sqlite3.applyWorkaroundToOpenSqlite3OnOldAndroidVersions();
+  return sql.applyWorkaroundToOpenSqlite3OnOldAndroidVersions();
+}
+
+Future<Database> openRawSqliteDbFromAsset(
+  String assetRelativePath,
+  String outputFilename, {
+  bool isReadOnly = false,
+}) async {
+  final dbFolder = await getApplicationDocumentsDirectory();
+  final file = dart.File(path_lib.join(dbFolder.path, outputFilename));
+  if (!await file.exists()) {
+    // copy file from assets
+    final blob = await rootBundle.load("assets/$assetRelativePath");
+    final buffer = blob.buffer;
+    await file.writeAsBytes(
+      buffer.asUint8List(blob.offsetInBytes, blob.lengthInBytes),
+      flush: true,
+    );
+  }
+  return sqlite3.open(
+    file.path,
+    mode: isReadOnly ? OpenMode.readOnly : OpenMode.readWriteCreate,
+  );
 }
--- a/app/lib/reverse_geocoder.dart
+++ b/app/lib/reverse_geocoder.dart
@ -0,0 +1,172 @@
+import 'dart:math' as math;
+
+import 'package:collection/collection.dart';
+import 'package:kdtree/kdtree.dart';
+import 'package:logging/logging.dart';
+import 'package:nc_photos/entity/file.dart';
+import 'package:nc_photos/math_util.dart' as math_util;
+import 'package:nc_photos/mobile/platform.dart'
+    if (dart.library.html) 'package:nc_photos/web/platform.dart' as platform;
+import 'package:sqlite3/common.dart';
+
+class ReverseGeocoderLocation {
+  const ReverseGeocoderLocation(this.name, this.latitude, this.longitude,
+      this.countryCode, this.admin1, this.admin2);
+
+  @override
+  toString() => "$runtimeType {"
+      "name: $name, "
+      "latitude: $latitude, "
+      "longitude: $longitude, "
+      "countryCode: $countryCode, "
+      "admin1: $admin1, "
+      "admin2: $admin2, "
+      "}";
+
+  final String name;
+  final double latitude;
+  final double longitude;
+  final String countryCode;
+  final String? admin1;
+  final String? admin2;
+}
+
+class ReverseGeocoder {
+  Future<void> init() async {
+    final s = Stopwatch()..start();
+    _db = await _openDatabase();
+    _searchTree = _buildSearchTree(_db);
+    _log.info("[init] Elapsed time: ${s.elapsedMilliseconds}ms");
+  }
+
+  /// Convert a geographic coordinate (in degree) into a location
+  Future<ReverseGeocoderLocation?> call(
+      double latitude, double longitude) async {
+    _log.info(
+        "[call] latitude: ${latitude.toStringAsFixed(3)}, longitude: ${longitude.toStringAsFixed(3)}");
+    final latitudeInt = (latitude * 10000).round();
+    final longitudeInt = (longitude * 10000).round();
+    final nearest = _searchTree
+        .nearest({"t": latitudeInt, "g": longitudeInt}, 1).firstOrNull;
+    if (nearest == null) {
+      _log.info("[call] Nearest point not found");
+      return null;
+    }
+    final nearestLat = nearest[0]["t"];
+    final nearestLatF = nearestLat / 10000;
+    final nearestLng = nearest[0]["g"];
+    final nearestLngF = nearestLng / 10000;
+    _log.info("[call] Nearest point, (lat: $nearestLatF, lng: $nearestLngF)");
+    try {
+      final distance = _distanceInKm(
+        math_util.degToRad(latitude),
+        math_util.degToRad(longitude),
+        math_util.degToRad(nearestLatF),
+        math_util.degToRad(nearestLngF),
+      );
+      _log.info(
+          "[call] (lat: ${latitude.toStringAsFixed(3)}, lng: ${longitude.toStringAsFixed(3)}) <-> (lat: $nearestLatF, lng: $nearestLngF) = ${distance.toStringAsFixed(3)}km");
+      // a completely arbitrary threshold :)
+      if (distance > 10) {
+        _log.info("[call] Nearest point is too far away");
+        return null;
+      }
+    } catch (e, stackTrace) {
+      _log.severe("[call] Uncaught exception", e, stackTrace);
+    }
+
+    final data = _queryPoint(nearestLat, nearestLng);
+    if (data == null) {
+      _log.severe(
+          "[call] Row not found for point: latitude: $nearestLat, longitude: $nearestLng");
+      return null;
+    }
+    final result = ReverseGeocoderLocation(data.name, data.latitude / 10000,
+        data.longitude / 10000, data.countryCode, data.admin1, data.admin2);
+    _log.info("[call] Found: $result");
+    return result;
+  }
+
+  _DatabaseRow? _queryPoint(int latitudeInt, int longitudeInt) {
+    final result = _db.select(
+      "SELECT * FROM cities WHERE latitude = ? AND longitude = ? LIMIT 1;",
+      [latitudeInt, longitudeInt],
+    );
+    if (result.isEmpty) {
+      return null;
+    } else {
+      return _DatabaseRow(
+        result.first.columnAt(1),
+        result.first.columnAt(2),
+        result.first.columnAt(3),
+        result.first.columnAt(4),
+        result.first.columnAt(5),
+        result.first.columnAt(6),
+      );
+    }
+  }
+
+  late final CommonDatabase _db;
+  late final KDTree _searchTree;
+
+  static final _log = Logger("reverse_geocoder.ReverseGeocoder");
+}
+
+extension ReverseGeocoderExtension on ReverseGeocoderLocation {
+  ImageLocation toImageLocation() {
+    return ImageLocation(
+      name: name,
+      latitude: latitude,
+      longitude: longitude,
+      countryCode: countryCode,
+      admin1: admin1,
+      admin2: admin2,
+    );
+  }
+}
+
+class _DatabaseRow {
+  const _DatabaseRow(this.name, this.latitude, this.longitude, this.countryCode,
+      this.admin1, this.admin2);
+
+  final String name;
+  final int latitude;
+  final int longitude;
+  final String countryCode;
+  final String? admin1;
+  final String? admin2;
+}
+
+Future<CommonDatabase> _openDatabase() async {
+  return platform.openRawSqliteDbFromAsset("cities.sqlite", "cities.sqlite");
+}
+
+KDTree _buildSearchTree(CommonDatabase db) {
+  final results = db.select("SELECT latitude, longitude FROM cities;");
+  return KDTree(
+    results.map((e) => {"t": e.columnAt(0), "g": e.columnAt(1)}).toList(),
+    _kdTreeDistance,
+    ["t", "g"],
+  );
+}
+
+int _kdTreeDistance(Map a, Map b) {
+  return (math.pow((a["t"] as int) - (b["t"] as int), 2) +
+      math.pow((a["g"] as int) - (b["g"] as int), 2)) as int;
+}
+
+/// Calculate the distance in KM between two point
+///
+/// Both latitude and longitude are expected to be in radian
+double _distanceInKm(
+    double latitude1, double longitude1, double latitude2, double longitude2) {
+  final dLat = latitude2 - latitude1;
+  final dLon = longitude2 - longitude1;
+  final a = math.pow(math.sin(dLat / 2), 2) +
+      math.cos(latitude1) *
+          math.cos(latitude2) *
+          math.pow(math.sin(dLon / 2), 2);
+  final c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a));
+  // 6371 = earth radius
+  return 6371 * c;
+}
--- a/app/lib/service.dart
+++ b/app/lib/service.dart
@ -19,6 +19,7 @@ import 'package:nc_photos/event/native_event.dart';
 import 'package:nc_photos/future_extension.dart';
 import 'package:nc_photos/language_util.dart' as language_util;
 import 'package:nc_photos/pref.dart';
+import 'package:nc_photos/reverse_geocoder.dart';
 import 'package:nc_photos/use_case/update_missing_metadata.dart';
 import 'package:nc_photos_plugin/nc_photos_plugin.dart';

@ -248,11 +249,13 @@ class _MetadataTask {
        path: file_util.unstripPath(account, accountPref.getShareFolderOr()));
    bool hasScanShareFolder = false;
    final c = KiwiContainer().resolve<DiContainer>();
+    final geocoder = ReverseGeocoder();
+    await geocoder.init();
    for (final r in account.roots) {
      final dir = File(path: file_util.unstripPath(account, r));
      hasScanShareFolder |= file_util.isOrUnderDir(shareFolder, dir);
      final updater = UpdateMissingMetadata(
-          c.fileRepo, const _UpdateMissingMetadataConfigProvider());
+          c.fileRepo, const _UpdateMissingMetadataConfigProvider(), geocoder);
      void onServiceStop() {
        _log.info("[_updateMetadata] Stopping task: user canceled");
        updater.stop();
@ -275,7 +278,7 @@ class _MetadataTask {
    }
    if (!hasScanShareFolder) {
      final shareUpdater = UpdateMissingMetadata(
-          c.fileRepo, const _UpdateMissingMetadataConfigProvider());
+          c.fileRepo, const _UpdateMissingMetadataConfigProvider(), geocoder);
      void onServiceStop() {
        _log.info("[_updateMetadata] Stopping task: user canceled");
        shareUpdater.stop();
--- a/app/lib/use_case/list_location_file.dart
+++ b/app/lib/use_case/list_location_file.dart
@ -0,0 +1,58 @@
+import 'package:drift/drift.dart' as sql;
+import 'package:nc_photos/account.dart';
+import 'package:nc_photos/di_container.dart';
+import 'package:nc_photos/entity/file.dart';
+import 'package:nc_photos/entity/sqlite_table_converter.dart';
+import 'package:nc_photos/entity/sqlite_table_extension.dart' as sql;
+import 'package:nc_photos/location_util.dart' as location_util;
+import 'package:nc_photos/object_extension.dart';
+
+class ListLocationFile {
+  ListLocationFile(this._c) : assert(require(_c));
+
+  static bool require(DiContainer c) => DiContainer.has(c, DiType.sqliteDb);
+
+  /// List all files located in [place], [countryCode]
+  Future<List<File>> call(
+      Account account, File dir, String? place, String countryCode) async {
+    final dbFiles = await _c.sqliteDb.use((db) async {
+      final query = db.queryFiles().run((q) {
+        q
+          ..setQueryMode(sql.FilesQueryMode.completeFile)
+          ..setAppAccount(account);
+        dir.strippedPathWithEmpty.run((p) {
+          if (p.isNotEmpty) {
+            q.byOrRelativePathPattern("$p/%");
+          }
+        });
+        return q.build();
+      });
+      if (place == null ||
+          location_util.alpha2CodeToName(countryCode) == place) {
+        // some places in the DB have the same name as the country, in such
+        // cases, we return all photos from the country
+        query.where(db.imageLocations.countryCode.equals(countryCode));
+      } else {
+        query
+          ..where(db.imageLocations.name.equals(place) |
+              db.imageLocations.admin1.equals(place) |
+              db.imageLocations.admin2.equals(place))
+          ..where(db.imageLocations.countryCode.equals(countryCode));
+      }
+      return await query
+          .map((r) => sql.CompleteFile(
+                r.readTable(db.files),
+                r.readTable(db.accountFiles),
+                r.readTableOrNull(db.images),
+                r.readTableOrNull(db.imageLocations),
+                r.readTableOrNull(db.trashes),
+              ))
+          .get();
+    });
+    return dbFiles
+        .map((f) => SqliteFileConverter.fromSql(account.userId.toString(), f))
+        .toList();
+  }
+
+  final DiContainer _c;
+}
--- a/app/lib/use_case/list_location_group.dart
+++ b/app/lib/use_case/list_location_group.dart
@ -0,0 +1,173 @@
+import 'package:drift/drift.dart' as sql;
+import 'package:logging/logging.dart';
+import 'package:nc_photos/account.dart';
+import 'package:nc_photos/di_container.dart';
+import 'package:nc_photos/entity/sqlite_table.dart' as sql;
+import 'package:nc_photos/entity/sqlite_table_extension.dart' as sql;
+import 'package:nc_photos/location_util.dart' as location_util;
+
+class LocationGroup {
+  const LocationGroup(
+      this.place, this.countryCode, this.count, this.latestFileId);
+
+  @override
+  toString() => "$runtimeType {"
+      "place: $place, "
+      "countryCode: $countryCode, "
+      "count: $count, "
+      "latestFileId: $latestFileId, "
+      "}";
+
+  final String place;
+  final String countryCode;
+  final int count;
+  final int latestFileId;
+}
+
+class LocationGroupResult {
+  const LocationGroupResult(
+      this.name, this.admin1, this.admin2, this.countryCode);
+
+  @override
+  toString() => "$runtimeType {"
+      "name: List {length: ${name.length}}, "
+      "admin1: List {length: ${admin1.length}}, "
+      "admin2: List {length: ${admin2.length}}, "
+      "countryCode: List {length: ${countryCode.length}}, "
+      "}";
+
+  final List<LocationGroup> name;
+  final List<LocationGroup> admin1;
+  final List<LocationGroup> admin2;
+  final List<LocationGroup> countryCode;
+}
+
+class ListLocationGroup {
+  ListLocationGroup(this._c) : assert(require(_c));
+
+  static bool require(DiContainer c) => DiContainer.has(c, DiType.sqliteDb);
+
+  /// List location groups based on the name of the places
+  Future<LocationGroupResult> call(Account account) async {
+    final s = Stopwatch()..start();
+    try {
+      return await _c.sqliteDb.use((db) async {
+        final dbAccount = await db.accountOf(account);
+
+        final nameResult = <LocationGroup>[];
+        final admin1Result = <LocationGroup>[];
+        final admin2Result = <LocationGroup>[];
+        final countryCodeResult = <LocationGroup>[];
+        for (final r in account.roots) {
+          final latest = db.accountFiles.bestDateTime.max();
+          final count = db.imageLocations.rowId.count();
+          final nameQ = _buildQuery(
+              db, dbAccount, r, latest, count, db.imageLocations.name);
+          try {
+            nameResult.addAll(await nameQ
+                .map((r) => LocationGroup(
+                      r.read(db.imageLocations.name)!,
+                      r.read(db.imageLocations.countryCode)!,
+                      r.read(count),
+                      r.read(db.files.fileId)!,
+                    ))
+                .get());
+          } catch (e, stackTrace) {
+            _log.shout("[call] Failed while query name group", e, stackTrace);
+          }
+
+          final admin1Q = _buildQuery(
+              db, dbAccount, r, latest, count, db.imageLocations.admin1);
+          try {
+            admin1Result.addAll(await admin1Q
+                .map((r) => LocationGroup(
+                      r.read(db.imageLocations.admin1)!,
+                      r.read(db.imageLocations.countryCode)!,
+                      r.read(count),
+                      r.read(db.files.fileId)!,
+                    ))
+                .get());
+          } catch (e, stackTrace) {
+            _log.shout("[call] Failed while query admin1 group", e, stackTrace);
+          }
+
+          final admin2Q = _buildQuery(
+              db, dbAccount, r, latest, count, db.imageLocations.admin2);
+          try {
+            admin2Result.addAll(await admin2Q
+                .map((r) => LocationGroup(
+                      r.read(db.imageLocations.admin2)!,
+                      r.read(db.imageLocations.countryCode)!,
+                      r.read(count),
+                      r.read(db.files.fileId)!,
+                    ))
+                .get());
+          } catch (e, stackTrace) {
+            _log.shout("[call] Failed while query admin2 group", e, stackTrace);
+          }
+
+          final countryCodeQ = _buildQuery(
+              db, dbAccount, r, latest, count, db.imageLocations.countryCode);
+          try {
+            countryCodeResult.addAll(await countryCodeQ.map((r) {
+              final cc = r.read(db.imageLocations.countryCode)!;
+              return LocationGroup(location_util.alpha2CodeToName(cc) ?? cc, cc,
+                  r.read(count), r.read(db.files.fileId)!);
+            }).get());
+          } catch (e, stackTrace) {
+            _log.shout(
+                "[call] Failed while query countryCode group", e, stackTrace);
+          }
+        }
+        return LocationGroupResult(
+            nameResult, admin1Result, admin2Result, countryCodeResult);
+      });
+    } finally {
+      _log.info("[call] Elapsed time: ${s.elapsedMilliseconds}ms");
+    }
+  }
+
+  sql.JoinedSelectStatement _buildQuery(
+    sql.SqliteDb db,
+    sql.Account dbAccount,
+    String dir,
+    sql.Expression<DateTime> latest,
+    sql.Expression<int> count,
+    sql.GeneratedColumn<String?> groupColumn,
+  ) {
+    final query = db.selectOnly(db.imageLocations).join([
+      sql.innerJoin(db.accountFiles,
+          db.accountFiles.rowId.equalsExp(db.imageLocations.accountFile),
+          useColumns: false),
+      sql.innerJoin(db.files, db.files.rowId.equalsExp(db.accountFiles.file),
+          useColumns: false),
+    ]);
+    if (identical(groupColumn, db.imageLocations.countryCode)) {
+      query
+        ..addColumns([db.imageLocations.countryCode, count, db.files.fileId])
+        ..groupBy([db.imageLocations.countryCode],
+            having: db.accountFiles.bestDateTime.equalsExp(latest));
+    } else {
+      query
+        ..addColumns([
+          groupColumn,
+          db.imageLocations.countryCode,
+          count,
+          db.files.fileId
+        ])
+        ..groupBy([groupColumn, db.imageLocations.countryCode],
+            having: db.accountFiles.bestDateTime.equalsExp(latest));
+    }
+    query
+      ..where(db.accountFiles.account.equals(dbAccount.rowId))
+      ..where(groupColumn.isNotNull());
+    if (dir.isNotEmpty) {
+      query.where(db.accountFiles.relativePath.like("$dir/%"));
+    }
+    return query;
+  }
+
+  final DiContainer _c;
+
+  static final _log = Logger("use_case.list_location_group.ListLocationGroup");
+}
--- a/app/lib/use_case/scan_dir_offline.dart
+++ b/app/lib/use_case/scan_dir_offline.dart
@ -46,6 +46,7 @@ class ScanDirOffline {
                  r.readTable(db.files),
                  r.readTable(db.accountFiles),
                  r.readTableOrNull(db.images),
+                  r.readTableOrNull(db.imageLocations),
                  r.readTableOrNull(db.trashes),
                ))
            .get();
@ -97,6 +98,7 @@ class ScanDirOfflineMini {
                r.readTable(db.files),
                r.readTable(db.accountFiles),
                r.readTableOrNull(db.images),
+                r.readTableOrNull(db.imageLocations),
                r.readTableOrNull(db.trashes),
              ))
          .get();
--- a/app/lib/use_case/update_missing_metadata.dart
+++ b/app/lib/use_case/update_missing_metadata.dart
@ -4,11 +4,13 @@ import 'package:kiwi/kiwi.dart';
 import 'package:logging/logging.dart';
 import 'package:nc_photos/account.dart';
 import 'package:nc_photos/connectivity_util.dart' as connectivity_util;
+import 'package:nc_photos/entity/exif_extension.dart';
 import 'package:nc_photos/entity/file.dart';
 import 'package:nc_photos/event/event.dart';
 import 'package:nc_photos/exception.dart';
 import 'package:nc_photos/exception_event.dart';
 import 'package:nc_photos/or_null.dart';
+import 'package:nc_photos/reverse_geocoder.dart';
 import 'package:nc_photos/use_case/get_file_binary.dart';
 import 'package:nc_photos/use_case/load_metadata.dart';
 import 'package:nc_photos/use_case/scan_missing_metadata.dart';
@ -19,7 +21,7 @@ abstract class UpdateMissingMetadataConfigProvider {
 }

 class UpdateMissingMetadata {
-  UpdateMissingMetadata(this.fileRepo, this.configProvider);
+  UpdateMissingMetadata(this.fileRepo, this.configProvider, this.geocoder);

  /// Update metadata for all files that support one under a dir
  ///
@ -43,6 +45,9 @@ class UpdateMissingMetadata {
      isRecursive: isRecursive,
    );
    await for (final d in dataStream) {
+      if (!_shouldRun) {
+        return;
+      }
      if (d is ExceptionEvent) {
        yield d;
        continue;
@ -54,28 +59,58 @@ class UpdateMissingMetadata {
        continue;
      }
      try {
-        // since we need to download multiple images in their original size,
-        // we only do it with WiFi
-        await _ensureWifi();
-        await _ensureBattery();
-        KiwiContainer().resolve<EventBus>().fire(
-            const MetadataTaskStateChangedEvent(MetadataTaskState.prcoessing));
-        if (!_shouldRun) {
-          return;
+        OrNull<Metadata>? metadataUpdate;
+        OrNull<ImageLocation>? locationUpdate;
+        if (file.metadata == null) {
+          // since we need to download multiple images in their original size,
+          // we only do it with WiFi
+          await _ensureWifi();
+          await _ensureBattery();
+          KiwiContainer().resolve<EventBus>().fire(
+              const MetadataTaskStateChangedEvent(
+                  MetadataTaskState.prcoessing));
+          if (!_shouldRun) {
+            return;
+          }
+          _log.fine("[call] Updating metadata for ${file.path}");
+          final binary = await GetFileBinary(fileRepo)(account, file);
+          final metadata =
+              (await LoadMetadata().loadRemote(account, file, binary)).copyWith(
+            fileEtag: file.etag,
+          );
+          metadataUpdate = OrNull(metadata);
+        } else {
+          _log.finer("[call] Skip updating metadata for ${file.path}");
        }
-        _log.fine("[call] Updating metadata for ${file.path}");
-        final binary = await GetFileBinary(fileRepo)(account, file);
-        final metadata =
-            (await LoadMetadata().loadRemote(account, file, binary)).copyWith(
-          fileEtag: file.etag,
-        );

-        await UpdateProperty(fileRepo)(
-          account,
-          file,
-          metadata: OrNull(metadata),
-        );
-        yield file;
+        final lat =
+            (metadataUpdate?.obj ?? file.metadata)?.exif?.gpsLatitudeDeg;
+        final lng =
+            (metadataUpdate?.obj ?? file.metadata)?.exif?.gpsLongitudeDeg;
+        try {
+          ImageLocation? location;
+          if (lat != null && lng != null) {
+            _log.fine("[call] Reverse geocoding for ${file.path}");
+            final l = await geocoder(lat, lng);
+            if (l != null) {
+              location = l.toImageLocation();
+            }
+          }
+          locationUpdate = OrNull(location ?? ImageLocation.empty());
+        } catch (e, stackTrace) {
+          _log.severe("[call] Failed while reverse geocoding: ${file.path}", e,
+              stackTrace);
+        }
+
+        if (metadataUpdate != null || locationUpdate != null) {
+          await UpdateProperty(fileRepo)(
+            account,
+            file,
+            metadata: metadataUpdate,
+            location: locationUpdate,
+          );
+          yield file;
+        }

        // slow down a bit to give some space for the main isolate
        await Future.delayed(const Duration(milliseconds: 10));
@ -123,6 +158,7 @@ class UpdateMissingMetadata {

  final FileRepo fileRepo;
  final UpdateMissingMetadataConfigProvider configProvider;
+  final ReverseGeocoder geocoder;

  bool _shouldRun = true;

--- a/app/lib/use_case/update_property.dart
+++ b/app/lib/use_case/update_property.dart
@ -16,11 +16,13 @@ class UpdateProperty {
    OrNull<bool>? isArchived,
    OrNull<DateTime>? overrideDateTime,
    bool? favorite,
+    OrNull<ImageLocation>? location,
  }) async {
    if (metadata == null &&
        isArchived == null &&
        overrideDateTime == null &&
-        favorite == null) {
+        favorite == null &&
+        location == null) {
      // ?
      _log.warning("[call] Nothing to update");
      return;
@ -37,6 +39,7 @@ class UpdateProperty {
      isArchived: isArchived,
      overrideDateTime: overrideDateTime,
      favorite: favorite,
+      location: location,
    );

    int properties = 0;
@ -52,6 +55,9 @@ class UpdateProperty {
    if (favorite != null) {
      properties |= FilePropertyUpdatedEvent.propFavorite;
    }
+    if (location != null) {
+      properties |= FilePropertyUpdatedEvent.propImageLocation;
+    }
    assert(properties != 0);
    KiwiContainer()
        .resolve<EventBus>()
--- a/app/lib/widget/about_geocoding_dialog.dart
+++ b/app/lib/widget/about_geocoding_dialog.dart
@ -0,0 +1,30 @@
+import 'package:flutter/material.dart';
+import 'package:nc_photos/app_localizations.dart';
+import 'package:nc_photos/theme.dart';
+
+class AboutGeocodingDialog extends StatelessWidget {
+  const AboutGeocodingDialog({
+    Key? key,
+  }) : super(key: key);
+
+  @override
+  build(BuildContext context) {
+    return AppTheme(
+      child: AlertDialog(
+        title: Text(L10n.global().gpsPlaceAboutDialogTitle),
+        content: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text(L10n.global().gpsPlaceAboutDialogContent),
+            const SizedBox(height: 16),
+            const Divider(height: 16),
+            const Text(
+              "Based on GeoNames Gazetteer data by GeoNames, licensed under CC BY 4.0",
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
--- a/app/lib/widget/home_search_suggestion.dart
+++ b/app/lib/widget/home_search_suggestion.dart
@ -11,9 +11,11 @@ import 'package:nc_photos/exception_util.dart' as exception_util;
 import 'package:nc_photos/k.dart' as k;
 import 'package:nc_photos/snack_bar_manager.dart';
 import 'package:nc_photos/theme.dart';
+import 'package:nc_photos/use_case/list_location_group.dart';
 import 'package:nc_photos/widget/album_browser_util.dart' as album_browser_util;
 import 'package:nc_photos/widget/page_visibility_mixin.dart';
 import 'package:nc_photos/widget/person_browser.dart';
+import 'package:nc_photos/widget/place_browser.dart';
 import 'package:nc_photos/widget/tag_browser.dart';

 class HomeSearchSuggestionController {
@ -133,6 +135,14 @@ class _HomeSearchSuggestionState extends State<HomeSearchSuggestion>
    }
  }

+  void _onLocationPressed(_LocationListItem item) {
+    if (mounted) {
+      Navigator.of(context).pushNamed(PlaceBrowser.routeName,
+          arguments: PlaceBrowserArguments(
+              widget.account, item.location.place, item.location.countryCode));
+    }
+  }
+
  void _transformItems(List<HomeSearchResult> results) {
    final items = () sync* {
      for (final r in results) {
@ -142,6 +152,8 @@ class _HomeSearchSuggestionState extends State<HomeSearchSuggestion>
          yield _TagListItem(r.tag, onTap: _onTagPressed);
        } else if (r is HomeSearchPersonResult) {
          yield _PersonListItem(r.person, onTap: _onPersonPressed);
+        } else if (r is HomeSearchLocationResult) {
+          yield _LocationListItem(r.location, onTap: _onLocationPressed);
        } else {
          _log.warning("[_transformItems] Unknown type: ${r.runtimeType}");
        }
@ -213,3 +225,20 @@ class _PersonListItem implements _ListItem {
  final Person person;
  final void Function(_PersonListItem)? onTap;
 }
+
+class _LocationListItem implements _ListItem {
+  const _LocationListItem(
+    this.location, {
+    this.onTap,
+  });
+
+  @override
+  buildWidget(BuildContext context) => ListTile(
+        leading: const Icon(Icons.location_on_outlined),
+        title: Text(location.place),
+        onTap: onTap == null ? null : () => onTap!(this),
+      );
+
+  final LocationGroup location;
+  final void Function(_LocationListItem)? onTap;
+}
--- a/app/lib/widget/my_app.dart
+++ b/app/lib/widget/my_app.dart
@ -23,6 +23,8 @@ import 'package:nc_photos/widget/image_editor.dart';
 import 'package:nc_photos/widget/local_file_viewer.dart';
 import 'package:nc_photos/widget/people_browser.dart';
 import 'package:nc_photos/widget/person_browser.dart';
+import 'package:nc_photos/widget/place_browser.dart';
+import 'package:nc_photos/widget/places_browser.dart';
 import 'package:nc_photos/widget/root_picker.dart';
 import 'package:nc_photos/widget/settings.dart';
 import 'package:nc_photos/widget/setup.dart';
@ -167,6 +169,8 @@ class _MyAppState extends State<MyApp>
    route ??= _handleChangelogRoute(settings);
    route ??= _handleTagBrowserRoute(settings);
    route ??= _handlePeopleBrowserRoute(settings);
+    route ??= _handlePlaceBrowserRoute(settings);
+    route ??= _handlePlacesBrowserRoute(settings);
    return route;
  }

@ -570,6 +574,32 @@ class _MyAppState extends State<MyApp>
    return null;
  }

+  Route<dynamic>? _handlePlaceBrowserRoute(RouteSettings settings) {
+    try {
+      if (settings.name == PlaceBrowser.routeName &&
+          settings.arguments != null) {
+        final args = settings.arguments as PlaceBrowserArguments;
+        return PlaceBrowser.buildRoute(args);
+      }
+    } catch (e) {
+      _log.severe("[_handlePlaceBrowserRoute] Failed while handling route", e);
+    }
+    return null;
+  }
+
+  Route<dynamic>? _handlePlacesBrowserRoute(RouteSettings settings) {
+    try {
+      if (settings.name == PlacesBrowser.routeName &&
+          settings.arguments != null) {
+        final args = settings.arguments as PlacesBrowserArguments;
+        return PlacesBrowser.buildRoute(args);
+      }
+    } catch (e) {
+      _log.severe("[_handlePlacesBrowserRoute] Failed while handling route", e);
+    }
+    return null;
+  }
+
  final _scaffoldMessengerKey = GlobalKey<ScaffoldMessengerState>();
  final _navigatorKey = GlobalKey<NavigatorState>();

--- a/app/lib/widget/place_browser.dart
+++ b/app/lib/widget/place_browser.dart
@ -0,0 +1,426 @@
+import 'dart:ui';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:kiwi/kiwi.dart';
+import 'package:logging/logging.dart';
+import 'package:nc_photos/account.dart';
+import 'package:nc_photos/app_localizations.dart';
+import 'package:nc_photos/bloc/list_location_file.dart';
+import 'package:nc_photos/compute_queue.dart';
+import 'package:nc_photos/di_container.dart';
+import 'package:nc_photos/download_handler.dart';
+import 'package:nc_photos/entity/file.dart';
+import 'package:nc_photos/exception_util.dart' as exception_util;
+import 'package:nc_photos/k.dart' as k;
+import 'package:nc_photos/language_util.dart' as language_util;
+import 'package:nc_photos/location_util.dart' as location_util;
+import 'package:nc_photos/object_extension.dart';
+import 'package:nc_photos/pref.dart';
+import 'package:nc_photos/share_handler.dart';
+import 'package:nc_photos/snack_bar_manager.dart';
+import 'package:nc_photos/theme.dart';
+import 'package:nc_photos/widget/about_geocoding_dialog.dart';
+import 'package:nc_photos/widget/builder/photo_list_item_builder.dart';
+import 'package:nc_photos/widget/handler/add_selection_to_album_handler.dart';
+import 'package:nc_photos/widget/handler/archive_selection_handler.dart';
+import 'package:nc_photos/widget/handler/remove_selection_handler.dart';
+import 'package:nc_photos/widget/photo_list_item.dart';
+import 'package:nc_photos/widget/photo_list_util.dart' as photo_list_util;
+import 'package:nc_photos/widget/selectable_item_stream_list_mixin.dart';
+import 'package:nc_photos/widget/selection_app_bar.dart';
+import 'package:nc_photos/widget/viewer.dart';
+import 'package:nc_photos/widget/zoom_menu_button.dart';
+
+class PlaceBrowserArguments {
+  const PlaceBrowserArguments(this.account, this.place, this.countryCode);
+
+  final Account account;
+  final String? place;
+  final String countryCode;
+}
+
+class PlaceBrowser extends StatefulWidget {
+  static const routeName = "/place-browser";
+
+  static Route buildRoute(PlaceBrowserArguments args) => MaterialPageRoute(
+        builder: (context) => PlaceBrowser.fromArgs(args),
+      );
+
+  const PlaceBrowser({
+    Key? key,
+    required this.account,
+    required this.place,
+    required this.countryCode,
+  }) : super(key: key);
+
+  PlaceBrowser.fromArgs(PlaceBrowserArguments args, {Key? key})
+      : this(
+          key: key,
+          account: args.account,
+          place: args.place,
+          countryCode: args.countryCode,
+        );
+
+  @override
+  createState() => _PlaceBrowserState();
+
+  final Account account;
+  final String? place;
+  final String countryCode;
+}
+
+class _PlaceBrowserState extends State<PlaceBrowser>
+    with SelectableItemStreamListMixin<PlaceBrowser> {
+  _PlaceBrowserState() {
+    final c = KiwiContainer().resolve<DiContainer>();
+    assert(require(c));
+    assert(ListLocationFileBloc.require(c));
+    _c = c;
+  }
+
+  static bool require(DiContainer c) => true;
+
+  @override
+  initState() {
+    super.initState();
+    _initBloc();
+    _thumbZoomLevel = Pref().getAlbumBrowserZoomLevelOr(0);
+  }
+
+  @override
+  build(BuildContext context) {
+    return AppTheme(
+      child: Scaffold(
+        body: BlocListener<ListLocationFileBloc, ListLocationFileBlocState>(
+          bloc: _bloc,
+          listener: (context, state) => _onStateChange(context, state),
+          child: BlocBuilder<ListLocationFileBloc, ListLocationFileBlocState>(
+            bloc: _bloc,
+            builder: (context, state) => _buildContent(context, state),
+          ),
+        ),
+      ),
+    );
+  }
+
+  @override
+  onItemTap(SelectableItem item, int index) {
+    item.as<PhotoListFileItem>()?.run((fileItem) {
+      Navigator.pushNamed(
+        context,
+        Viewer.routeName,
+        arguments:
+            ViewerArguments(widget.account, _backingFiles, fileItem.fileIndex),
+      );
+    });
+  }
+
+  void _initBloc() {
+    _log.info("[_initBloc] Initialize bloc");
+    _reqQuery();
+  }
+
+  Widget _buildContent(BuildContext context, ListLocationFileBlocState state) {
+    return buildItemStreamListOuter(
+      context,
+      child: Theme(
+        data: Theme.of(context).copyWith(
+          colorScheme: Theme.of(context).colorScheme.copyWith(
+                secondary: AppTheme.getOverscrollIndicatorColor(context),
+              ),
+        ),
+        child: CustomScrollView(
+          slivers: [
+            _buildAppBar(context, state),
+            if (state is ListLocationFileBlocLoading ||
+                _buildItemQueue.isProcessing)
+              const SliverToBoxAdapter(
+                child: Align(
+                  alignment: Alignment.center,
+                  child: LinearProgressIndicator(),
+                ),
+              ),
+            buildItemStreamList(
+              maxCrossAxisExtent: _thumbSize.toDouble(),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildAppBar(BuildContext context, ListLocationFileBlocState state) {
+    if (isSelectionMode) {
+      return _buildSelectionAppBar(context);
+    } else {
+      return _buildNormalAppBar(context, state);
+    }
+  }
+
+  Widget _buildNormalAppBar(
+      BuildContext context, ListLocationFileBlocState state) {
+    return SliverAppBar(
+      floating: true,
+      titleSpacing: 0,
+      title: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Text(
+            widget.place ?? location_util.alpha2CodeToName(widget.countryCode)!,
+            style: TextStyle(
+              color: AppTheme.getPrimaryTextColor(context),
+            ),
+            maxLines: 1,
+            softWrap: false,
+            overflow: TextOverflow.clip,
+          ),
+          if (state is! ListLocationFileBlocLoading &&
+              !_buildItemQueue.isProcessing)
+            Text(
+              L10n.global().personPhotoCountText(_backingFiles.length),
+              style: TextStyle(
+                color: AppTheme.getSecondaryTextColor(context),
+                fontSize: 12,
+              ),
+            ),
+        ],
+      ),
+      actions: [
+        ZoomMenuButton(
+          initialZoom: _thumbZoomLevel,
+          minZoom: 0,
+          maxZoom: 2,
+          onZoomChanged: (value) {
+            setState(() {
+              _thumbZoomLevel = value.round();
+            });
+            Pref().setAlbumBrowserZoomLevel(_thumbZoomLevel);
+          },
+        ),
+        IconButton(
+          onPressed: () {
+            showDialog(
+              context: context,
+              builder: (_) => const AboutGeocodingDialog(),
+            );
+          },
+          icon: const Icon(Icons.info_outline),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildSelectionAppBar(BuildContext context) {
+    return SelectionAppBar(
+      count: selectedListItems.length,
+      onClosePressed: () {
+        setState(() {
+          clearSelectedItems();
+        });
+      },
+      actions: [
+        IconButton(
+          icon: const Icon(Icons.share),
+          tooltip: L10n.global().shareTooltip,
+          onPressed: () {
+            _onSelectionSharePressed(context);
+          },
+        ),
+        IconButton(
+          icon: const Icon(Icons.add),
+          tooltip: L10n.global().addToAlbumTooltip,
+          onPressed: () {
+            _onSelectionAddToAlbumPressed(context);
+          },
+        ),
+        PopupMenuButton<_SelectionMenuOption>(
+          tooltip: MaterialLocalizations.of(context).moreButtonTooltip,
+          itemBuilder: (context) => [
+            PopupMenuItem(
+              value: _SelectionMenuOption.download,
+              child: Text(L10n.global().downloadTooltip),
+            ),
+            PopupMenuItem(
+              value: _SelectionMenuOption.archive,
+              child: Text(L10n.global().archiveTooltip),
+            ),
+            PopupMenuItem(
+              value: _SelectionMenuOption.delete,
+              child: Text(L10n.global().deleteTooltip),
+            ),
+          ],
+          onSelected: (option) {
+            _onSelectionMenuSelected(context, option);
+          },
+        ),
+      ],
+    );
+  }
+
+  void _onStateChange(BuildContext context, ListLocationFileBlocState state) {
+    if (state is ListLocationFileBlocInit) {
+      itemStreamListItems = [];
+    } else if (state is ListLocationFileBlocSuccess ||
+        state is ListLocationFileBlocLoading) {
+      _transformItems(state.items);
+    } else if (state is ListLocationFileBlocFailure) {
+      _transformItems(state.items);
+      SnackBarManager().showSnackBar(SnackBar(
+        content: Text(exception_util.toUserString(state.exception)),
+        duration: k.snackBarDurationNormal,
+      ));
+    } else if (state is ListLocationFileBlocInconsistent) {
+      _reqQuery();
+    }
+  }
+
+  void _onSelectionMenuSelected(
+      BuildContext context, _SelectionMenuOption option) {
+    switch (option) {
+      case _SelectionMenuOption.archive:
+        _onSelectionArchivePressed(context);
+        break;
+      case _SelectionMenuOption.delete:
+        _onSelectionDeletePressed(context);
+        break;
+      case _SelectionMenuOption.download:
+        _onSelectionDownloadPressed();
+        break;
+      default:
+        _log.shout("[_onSelectionMenuSelected] Unknown option: $option");
+        break;
+    }
+  }
+
+  void _onSelectionSharePressed(BuildContext context) {
+    final selected = selectedListItems
+        .whereType<PhotoListFileItem>()
+        .map((e) => e.file)
+        .toList();
+    ShareHandler(
+      context: context,
+      clearSelection: () {
+        setState(() {
+          clearSelectedItems();
+        });
+      },
+    ).shareFiles(widget.account, selected);
+  }
+
+  Future<void> _onSelectionAddToAlbumPressed(BuildContext context) {
+    return AddSelectionToAlbumHandler()(
+      context: context,
+      account: widget.account,
+      selectedFiles: selectedListItems
+          .whereType<PhotoListFileItem>()
+          .map((e) => e.file)
+          .toList(),
+      clearSelection: () {
+        if (mounted) {
+          setState(() {
+            clearSelectedItems();
+          });
+        }
+      },
+    );
+  }
+
+  void _onSelectionDownloadPressed() {
+    final selected = selectedListItems
+        .whereType<PhotoListFileItem>()
+        .map((e) => e.file)
+        .toList();
+    DownloadHandler().downloadFiles(widget.account, selected);
+    setState(() {
+      clearSelectedItems();
+    });
+  }
+
+  Future<void> _onSelectionArchivePressed(BuildContext context) async {
+    final selectedFiles = selectedListItems
+        .whereType<PhotoListFileItem>()
+        .map((e) => e.file)
+        .toList();
+    setState(() {
+      clearSelectedItems();
+    });
+    await ArchiveSelectionHandler(KiwiContainer().resolve<DiContainer>())(
+      account: widget.account,
+      selectedFiles: selectedFiles,
+    );
+  }
+
+  Future<void> _onSelectionDeletePressed(BuildContext context) async {
+    final selectedFiles = selectedListItems
+        .whereType<PhotoListFileItem>()
+        .map((e) => e.file)
+        .toList();
+    setState(() {
+      clearSelectedItems();
+    });
+    await RemoveSelectionHandler()(
+      account: widget.account,
+      selectedFiles: selectedFiles,
+      isMoveToTrash: true,
+    );
+  }
+
+  Future<void> _transformItems(List<File> files) async {
+    final PhotoListItemSorter? sorter;
+    final PhotoListItemGrouper? grouper;
+    if (Pref().isPhotosTabSortByNameOr()) {
+      sorter = photoListFilenameSorter;
+      grouper = null;
+    } else {
+      sorter = photoListFileDateTimeSorter;
+      grouper = PhotoListFileDateGrouper(isMonthOnly: _thumbZoomLevel < 0);
+    }
+
+    _buildItemQueue.addJob(
+      PhotoListItemBuilderArguments(
+        widget.account,
+        files,
+        sorter: sorter,
+        grouper: grouper,
+        shouldShowFavoriteBadge: true,
+        locale: language_util.getSelectedLocale() ??
+            PlatformDispatcher.instance.locale,
+      ),
+      buildPhotoListItem,
+      (result) {
+        if (mounted) {
+          setState(() {
+            _backingFiles = result.backingFiles;
+            itemStreamListItems = result.listItems;
+          });
+        }
+      },
+    );
+  }
+
+  void _reqQuery() {
+    _bloc.add(ListLocationFileBlocQuery(
+        widget.account, widget.place, widget.countryCode));
+  }
+
+  late final DiContainer _c;
+
+  late final ListLocationFileBloc _bloc = ListLocationFileBloc(_c);
+  var _backingFiles = <File>[];
+
+  final _buildItemQueue =
+      ComputeQueue<PhotoListItemBuilderArguments, PhotoListItemBuilderResult>();
+
+  var _thumbZoomLevel = 0;
+  int get _thumbSize => photo_list_util.getThumbSize(_thumbZoomLevel);
+
+  static final _log = Logger("widget.place_browser._PlaceBrowserState");
+}
+
+enum _SelectionMenuOption {
+  archive,
+  delete,
+  download,
+}
--- a/app/lib/widget/places_browser.dart
+++ b/app/lib/widget/places_browser.dart
@ -0,0 +1,349 @@
+import 'package:cached_network_image/cached_network_image.dart';
+import 'package:cached_network_image_platform_interface/cached_network_image_platform_interface.dart';
+import 'package:collection/collection.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
+import 'package:kiwi/kiwi.dart';
+import 'package:logging/logging.dart';
+import 'package:nc_photos/account.dart';
+import 'package:nc_photos/api/api.dart';
+import 'package:nc_photos/api/api_util.dart' as api_util;
+import 'package:nc_photos/app_localizations.dart';
+import 'package:nc_photos/bloc/list_location.dart';
+import 'package:nc_photos/cache_manager_util.dart';
+import 'package:nc_photos/di_container.dart';
+import 'package:nc_photos/exception.dart';
+import 'package:nc_photos/exception_util.dart' as exception_util;
+import 'package:nc_photos/k.dart' as k;
+import 'package:nc_photos/snack_bar_manager.dart';
+import 'package:nc_photos/theme.dart';
+import 'package:nc_photos/use_case/list_location_group.dart';
+import 'package:nc_photos/widget/about_geocoding_dialog.dart';
+import 'package:nc_photos/widget/collection_list_item.dart';
+import 'package:nc_photos/widget/place_browser.dart';
+
+class PlacesBrowserArguments {
+  const PlacesBrowserArguments(this.account);
+
+  final Account account;
+}
+
+/// Show a list of all people associated with this account
+class PlacesBrowser extends StatefulWidget {
+  static const routeName = "/places-browser";
+
+  static Route buildRoute(PlacesBrowserArguments args) => MaterialPageRoute(
+        builder: (context) => PlacesBrowser.fromArgs(args),
+      );
+
+  const PlacesBrowser({
+    Key? key,
+    required this.account,
+  }) : super(key: key);
+
+  PlacesBrowser.fromArgs(PlacesBrowserArguments args, {Key? key})
+      : this(
+          key: key,
+          account: args.account,
+        );
+
+  @override
+  createState() => _PlacesBrowserState();
+
+  final Account account;
+}
+
+class _PlacesBrowserState extends State<PlacesBrowser> {
+  @override
+  initState() {
+    super.initState();
+    _initBloc();
+  }
+
+  @override
+  build(BuildContext context) {
+    return AppTheme(
+      child: Scaffold(
+        body: BlocListener<ListLocationBloc, ListLocationBlocState>(
+          bloc: _bloc,
+          listener: (context, state) => _onStateChange(context, state),
+          child: BlocBuilder<ListLocationBloc, ListLocationBlocState>(
+            bloc: _bloc,
+            builder: (context, state) => _buildContent(context, state),
+          ),
+        ),
+      ),
+    );
+  }
+
+  void _initBloc() {
+    if (_bloc.state is ListLocationBlocInit) {
+      _log.info("[_initBloc] Initialize bloc");
+    } else {
+      // process the current state
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        setState(() {
+          _onStateChange(context, _bloc.state);
+        });
+      });
+    }
+    _reqQuery();
+  }
+
+  Widget _buildContent(BuildContext context, ListLocationBlocState state) {
+    return Stack(
+      children: [
+        Theme(
+          data: Theme.of(context).copyWith(
+            colorScheme: Theme.of(context).colorScheme.copyWith(
+                  secondary: AppTheme.getOverscrollIndicatorColor(context),
+                ),
+          ),
+          child: CustomScrollView(
+            slivers: [
+              _buildAppBar(context),
+              if (state is ListLocationBlocLoading)
+                const SliverToBoxAdapter(
+                  child: Align(
+                    alignment: Alignment.center,
+                    child: LinearProgressIndicator(),
+                  ),
+                ),
+              SliverToBoxAdapter(
+                child: SizedBox(
+                  height: 48,
+                  child: ListView.separated(
+                    scrollDirection: Axis.horizontal,
+                    padding: const EdgeInsets.symmetric(horizontal: 8),
+                    itemCount: _countryItems.length,
+                    itemBuilder: (context, i) =>
+                        _countryItems[i].buildWidget(context),
+                    separatorBuilder: (_, __) => const SizedBox(width: 8),
+                  ),
+                ),
+              ),
+              const SliverToBoxAdapter(
+                child: SizedBox(height: 8),
+              ),
+              SliverStaggeredGrid.extentBuilder(
+                maxCrossAxisExtent: 160,
+                mainAxisSpacing: 2,
+                crossAxisSpacing: 2,
+                itemCount: _placeItems.length,
+                itemBuilder: (context, i) =>
+                    _placeItems[i].buildWidget(context),
+                staggeredTileBuilder: (_) => const StaggeredTile.count(1, 1),
+              ),
+            ],
+          ),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildAppBar(BuildContext context) {
+    return SliverAppBar(
+      title: Text(L10n.global().collectionPlacesLabel),
+      floating: true,
+      actions: [
+        IconButton(
+          onPressed: () {
+            showDialog(
+              context: context,
+              builder: (_) => const AboutGeocodingDialog(),
+            );
+          },
+          icon: const Icon(Icons.info_outline),
+        ),
+      ],
+    );
+  }
+
+  void _onStateChange(BuildContext context, ListLocationBlocState state) {
+    if (state is ListLocationBlocInit) {
+      _placeItems = [];
+      _countryItems = [];
+    } else if (state is ListLocationBlocSuccess ||
+        state is ListLocationBlocLoading) {
+      _transformItems(state.result);
+    } else if (state is ListLocationBlocFailure) {
+      _transformItems(state.result);
+      try {
+        final e = state.exception as ApiException;
+        if (e.response.statusCode == 404) {
+          // face recognition app probably not installed, ignore
+          return;
+        }
+      } catch (_) {}
+      SnackBarManager().showSnackBar(SnackBar(
+        content: Text(exception_util.toUserString(state.exception)),
+        duration: k.snackBarDurationNormal,
+      ));
+    }
+  }
+
+  void _onPlaceTap(LocationGroup location) {
+    Navigator.pushNamed(context, PlaceBrowser.routeName,
+        arguments: PlaceBrowserArguments(
+            widget.account, location.place, location.countryCode));
+  }
+
+  void _onCountryTap(LocationGroup location) {
+    Navigator.pushNamed(context, PlaceBrowser.routeName,
+        arguments:
+            PlaceBrowserArguments(widget.account, null, location.countryCode));
+  }
+
+  void _transformItems(LocationGroupResult? result) {
+    if (result == null) {
+      _placeItems = [];
+      _countryItems = [];
+      return;
+    }
+
+    int sorter(LocationGroup a, LocationGroup b) {
+      final compare = b.count.compareTo(a.count);
+      if (compare == 0) {
+        return a.place.compareTo(b.place);
+      } else {
+        return compare;
+      }
+    }
+
+    _placeItems = result.name
+        .sorted(sorter)
+        .map((e) => _PlaceItem(
+              account: widget.account,
+              place: e.place,
+              thumbUrl: api_util.getFilePreviewUrlByFileId(
+                widget.account,
+                e.latestFileId,
+                width: k.photoThumbSize,
+                height: k.photoThumbSize,
+              ),
+              onTap: () => _onPlaceTap(e),
+            ))
+        .toList();
+    _countryItems = result.countryCode
+        .sorted(sorter)
+        .map((e) => _CountryItem(
+              account: widget.account,
+              country: e.place,
+              thumbUrl: api_util.getFilePreviewUrlByFileId(
+                widget.account,
+                e.latestFileId,
+                width: k.photoThumbSize,
+                height: k.photoThumbSize,
+              ),
+              onTap: () => _onCountryTap(e),
+            ))
+        .toList();
+  }
+
+  void _reqQuery() {
+    _bloc.add(ListLocationBlocQuery(widget.account));
+  }
+
+  late final _bloc = ListLocationBloc(KiwiContainer().resolve<DiContainer>());
+
+  var _placeItems = <_PlaceItem>[];
+  var _countryItems = <_CountryItem>[];
+
+  static final _log = Logger("widget.places_browser._PlacesBrowserState");
+}
+
+class _PlaceItem {
+  const _PlaceItem({
+    required this.account,
+    required this.place,
+    required this.thumbUrl,
+    this.onTap,
+  });
+
+  Widget buildWidget(BuildContext context) => CollectionListSmall(
+        account: account,
+        label: place,
+        coverUrl: thumbUrl,
+        fallbackBuilder: (_) => Icon(
+          Icons.location_on,
+          color: Colors.white.withOpacity(.8),
+        ),
+        onTap: onTap,
+      );
+
+  final Account account;
+  final String place;
+  final String thumbUrl;
+  final VoidCallback? onTap;
+}
+
+class _CountryItem {
+  const _CountryItem({
+    required this.account,
+    required this.country,
+    required this.thumbUrl,
+    this.onTap,
+  });
+
+  Widget buildWidget(BuildContext context) {
+    return ClipRRect(
+      borderRadius: BorderRadius.circular(16),
+      child: Stack(
+        alignment: Alignment.center,
+        children: [
+          Row(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              CachedNetworkImage(
+                cacheManager: ThumbnailCacheManager.inst,
+                imageUrl: thumbUrl,
+                httpHeaders: {
+                  "Authorization": Api.getAuthorizationHeaderValue(account),
+                },
+                fadeInDuration: const Duration(),
+                filterQuality: FilterQuality.high,
+                errorWidget: (_, __, ___) => Padding(
+                  padding: const EdgeInsetsDirectional.fromSTEB(8, 8, 0, 8),
+                  child: Icon(
+                    Icons.location_on,
+                    color: AppTheme.getUnfocusedIconColor(context),
+                  ),
+                ),
+                imageRenderMethodForWeb: ImageRenderMethodForWeb.HttpGet,
+              ),
+              const SizedBox(width: 8),
+              Text(country),
+              const SizedBox(width: 8),
+            ],
+          ),
+          Positioned.fill(
+            child: Container(
+              decoration: BoxDecoration(
+                border: Border.all(
+                  color: AppTheme.getListItemBackgroundColor(context),
+                  width: 1,
+                ),
+                borderRadius: BorderRadius.circular(16),
+              ),
+            ),
+          ),
+          if (onTap != null)
+            Positioned.fill(
+              child: Material(
+                type: MaterialType.transparency,
+                child: InkWell(
+                  onTap: onTap,
+                ),
+              ),
+            ),
+        ],
+      ),
+    );
+  }
+
+  final Account account;
+  final String country;
+  final String thumbUrl;
+  final VoidCallback? onTap;
+}
--- a/app/lib/widget/search_landing.dart
+++ b/app/lib/widget/search_landing.dart
@ -21,8 +21,11 @@ import 'package:nc_photos/pref.dart';
 import 'package:nc_photos/snack_bar_manager.dart';
 import 'package:nc_photos/theme.dart';
 import 'package:nc_photos/url_launcher_util.dart';
+import 'package:nc_photos/use_case/list_location_group.dart';
 import 'package:nc_photos/widget/people_browser.dart';
 import 'package:nc_photos/widget/person_browser.dart';
+import 'package:nc_photos/widget/place_browser.dart';
+import 'package:nc_photos/widget/places_browser.dart';

 class SearchLanding extends StatefulWidget {
  const SearchLanding({
@ -85,6 +88,7 @@ class _SearchLandingState extends State<SearchLanding> {
      children: [
        if (AccountPref.of(widget.account).isEnableFaceRecognitionAppOr())
          ..._buildPeopleSection(context, state),
+        ..._buildLocationSection(context, state),
        ListTile(
          contentPadding: const EdgeInsets.symmetric(horizontal: 16),
          title: Text(L10n.global().categoriesLabel),
@ -113,7 +117,7 @@ class _SearchLandingState extends State<SearchLanding> {
      BuildContext context, SearchLandingBlocState state) {
    final isNoResult = (state is SearchLandingBlocSuccess ||
            state is SearchLandingBlocFailure) &&
-        state.persons.isEmpty;
+        _personItems.isEmpty;
    return [
      ListTile(
        contentPadding: const EdgeInsets.symmetric(horizontal: 16),
@ -147,26 +151,61 @@ class _SearchLandingState extends State<SearchLanding> {
          child: ListView.builder(
            padding: const EdgeInsets.symmetric(horizontal: 16),
            scrollDirection: Axis.horizontal,
-            itemCount: _items.length,
-            itemBuilder: (context, i) => _buildItem(context, i),
+            itemCount: _personItems.length,
+            itemBuilder: (context, i) => _personItems[i].buildWidget(context),
          ),
        ),
    ];
  }

-  Widget _buildItem(BuildContext context, int index) {
-    final item = _items[index];
-    return item.buildWidget(context);
+  List<Widget> _buildLocationSection(
+      BuildContext context, SearchLandingBlocState state) {
+    final isNoResult = (state is SearchLandingBlocSuccess ||
+            state is SearchLandingBlocFailure) &&
+        _locationItems.isEmpty;
+    return [
+      ListTile(
+        contentPadding: const EdgeInsets.symmetric(horizontal: 16),
+        title: Text(L10n.global().collectionPlacesLabel),
+        trailing: isNoResult
+            ? null
+            : TextButton(
+                onPressed: () {
+                  Navigator.of(context).pushNamed(PlacesBrowser.routeName,
+                      arguments: PlacesBrowserArguments(widget.account));
+                },
+                child: Text(L10n.global().showAllButtonLabel),
+              ),
+      ),
+      if (isNoResult)
+        SizedBox(
+          height: 48,
+          child: Center(
+            child: Text(L10n.global().listNoResultsText),
+          ),
+        )
+      else
+        SizedBox(
+          height: 128,
+          child: ListView.builder(
+            padding: const EdgeInsets.symmetric(horizontal: 16),
+            scrollDirection: Axis.horizontal,
+            itemCount: _locationItems.length,
+            itemBuilder: (context, i) => _locationItems[i].buildWidget(context),
+          ),
+        ),
+    ];
  }

  void _onStateChange(BuildContext context, SearchLandingBlocState state) {
    if (state is SearchLandingBlocInit) {
-      _items = [];
+      _personItems = [];
+      _locationItems = [];
    } else if (state is SearchLandingBlocSuccess ||
        state is SearchLandingBlocLoading) {
-      _transformItems(state.persons);
+      _transformItems(state.persons, state.locations);
    } else if (state is SearchLandingBlocFailure) {
-      _transformItems(state.persons);
+      _transformItems(state.persons, state.locations);
      try {
        final e = state.exception as ApiException;
        if (e.response.statusCode == 404) {
@ -189,13 +228,26 @@ class _SearchLandingState extends State<SearchLanding> {
    widget.onVideoPressed?.call();
  }

-  void _onItemTap(Person person) {
+  void _onPersonItemTap(Person person) {
    Navigator.pushNamed(context, PersonBrowser.routeName,
        arguments: PersonBrowserArguments(widget.account, person));
  }

-  void _transformItems(List<Person> items) {
-    _items = items
+  void _onLocationItemTap(LocationGroup location) {
+    Navigator.of(context).pushNamed(
+      PlaceBrowser.routeName,
+      arguments: PlaceBrowserArguments(
+          widget.account, location.place, location.countryCode),
+    );
+  }
+
+  void _transformItems(List<Person> persons, LocationGroupResult locations) {
+    _transformPersons(persons);
+    _transformLocations(locations);
+  }
+
+  void _transformPersons(List<Person> persons) {
+    _personItems = persons
        .sorted((a, b) {
          final countCompare = b.count.compareTo(a.count);
          if (countCompare == 0) {
@ -209,7 +261,31 @@ class _SearchLandingState extends State<SearchLanding> {
              name: e.name,
              faceUrl: api_util.getFacePreviewUrl(widget.account, e.thumbFaceId,
                  size: k.faceThumbSize),
-              onTap: () => _onItemTap(e),
+              onTap: () => _onPersonItemTap(e),
+            ))
+        .toList();
+  }
+
+  void _transformLocations(LocationGroupResult locations) {
+    _locationItems = locations.name
+        .sorted((a, b) {
+          final compare = b.count.compareTo(a.count);
+          if (compare == 0) {
+            return a.place.compareTo(b.place);
+          } else {
+            return compare;
+          }
+        })
+        .map((e) => _LandingLocationItem(
+              account: widget.account,
+              name: e.place,
+              thumbUrl: api_util.getFilePreviewUrlByFileId(
+                widget.account,
+                e.latestFileId,
+                width: k.photoThumbSize,
+                height: k.photoThumbSize,
+              ),
+              onTap: () => _onLocationItemTap(e),
            ))
        .toList();
  }
@ -220,7 +296,8 @@ class _SearchLandingState extends State<SearchLanding> {

  late final _bloc = SearchLandingBloc(KiwiContainer().resolve<DiContainer>());

-  var _items = <_LandingPersonItem>[];
+  var _personItems = <_LandingPersonItem>[];
+  var _locationItems = <_LandingLocationItem>[];

  static final _log = Logger("widget.search_landing._SearchLandingState");
 }
@ -250,6 +327,31 @@ class _LandingPersonItem {
  final VoidCallback? onTap;
 }

+class _LandingLocationItem {
+  _LandingLocationItem({
+    required this.account,
+    required this.name,
+    required this.thumbUrl,
+    this.onTap,
+  });
+
+  Widget buildWidget(BuildContext context) => _LandingItemWidget(
+        account: account,
+        label: name,
+        coverUrl: thumbUrl,
+        onTap: onTap,
+        fallbackBuilder: (_) => Icon(
+          Icons.location_on,
+          color: Colors.white.withOpacity(.8),
+        ),
+      );
+
+  final Account account;
+  final String name;
+  final String thumbUrl;
+  final VoidCallback? onTap;
+}
+
 class _LandingItemWidget extends StatelessWidget {
  const _LandingItemWidget({
    Key? key,
--- a/app/lib/widget/viewer_detail_pane.dart
+++ b/app/lib/widget/viewer_detail_pane.dart
@ -17,7 +17,9 @@ import 'package:nc_photos/entity/album/provider.dart';
 import 'package:nc_photos/entity/exif_extension.dart';
 import 'package:nc_photos/entity/file.dart';
 import 'package:nc_photos/k.dart' as k;
+import 'package:nc_photos/location_util.dart' as location_util;
 import 'package:nc_photos/notified_action.dart';
+import 'package:nc_photos/object_extension.dart';
 import 'package:nc_photos/platform/features.dart' as features;
 import 'package:nc_photos/platform/k.dart' as platform_k;
 import 'package:nc_photos/snack_bar_manager.dart';
@ -26,6 +28,7 @@ import 'package:nc_photos/use_case/list_file_tag.dart';
 import 'package:nc_photos/use_case/remove_from_album.dart';
 import 'package:nc_photos/use_case/update_album.dart';
 import 'package:nc_photos/use_case/update_property.dart';
+import 'package:nc_photos/widget/about_geocoding_dialog.dart';
 import 'package:nc_photos/widget/animated_visibility.dart';
 import 'package:nc_photos/widget/gps_map.dart';
 import 'package:nc_photos/widget/handler/add_selection_to_album_handler.dart';
@ -291,6 +294,27 @@ class _ViewerDetailPaneState extends State<ViewerDetailPane> {
              title: Text(_model!),
              subtitle: cameraSubStr.isNotEmpty ? Text(cameraSubStr) : null,
            ),
+          if (_location?.name != null)
+            ListTile(
+              leading: ListTileCenterLeading(
+                child: Icon(
+                  Icons.location_on_outlined,
+                  color: AppTheme.getSecondaryTextColor(context),
+                ),
+              ),
+              title: Text(L10n.global().gpsPlaceText(_location!.name!)),
+              subtitle: _location!.toSubtitle()?.run((obj) => Text(obj)),
+              trailing: Icon(
+                Icons.info_outline,
+                color: AppTheme.getSecondaryTextColor(context),
+              ),
+              onTap: () {
+                showDialog(
+                  context: context,
+                  builder: (_) => const AboutGeocodingDialog(),
+                );
+              },
+            ),
          if (features.isSupportMapView && _gps != null)
            AnimatedVisibility(
              opacity: _shouldBlockGpsMap ? 0 : 1,
@ -339,6 +363,7 @@ class _ViewerDetailPaneState extends State<ViewerDetailPane> {
    if (lat != null && lng != null) {
      _log.fine("GPS: ($lat, $lng)");
      _gps = Tuple2(lat, lng);
+      _location = widget.file.location;
    }
  }

@ -520,6 +545,7 @@ class _ViewerDetailPaneState extends State<ViewerDetailPane> {
  double? _focalLength;
  int? _isoSpeedRatings;
  Tuple2<double, double>? _gps;
+  ImageLocation? _location;

  final _tags = <String>[];

@ -589,3 +615,17 @@ String _byteSizeToString(int byteSize) {
  }
  return "${remain.toStringAsFixed(2)}${units[i]}";
 }
+
+extension on ImageLocation {
+  String? toSubtitle() {
+    if (countryCode == null) {
+      return null;
+    } else if (admin1 == null) {
+      return location_util.alpha2CodeToName(countryCode!);
+    } else if (admin2 == null) {
+      return "$admin1, ${location_util.alpha2CodeToName(countryCode!)}";
+    } else {
+      return "$admin2, $admin1, ${location_util.alpha2CodeToName(countryCode!)}";
+    }
+  }
+}
--- a/app/pubspec.lock
+++ b/app/pubspec.lock
@ -679,6 +679,13 @@ packages:
      url: "https://pub.dartlang.org"
    source: hosted
    version: "4.6.0"
+  kdtree:
+    dependency: "direct main"
+    description:
+      name: kdtree
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.2.0"
  kiwi:
    dependency: "direct main"
    description:
@ -1161,7 +1168,7 @@ packages:
    source: hosted
    version: "2.2.1+1"
  sqlite3:
-    dependency: transitive
+    dependency: "direct main"
    description:
      name: sqlite3
      url: "https://pub.dartlang.org"
--- a/app/pubspec.yaml
+++ b/app/pubspec.yaml
@ -76,6 +76,7 @@ dependencies:
      ref: 1.0.0-nc-photos-2
      path: library
  intl: ^0.17.0
+  kdtree: ^0.2.0
  kiwi: ^4.0.1
  logging: ^1.0.1
  memory_info: ^0.0.2
@ -90,6 +91,7 @@ dependencies:
  quiver: ^3.1.0
  screen_brightness:  ^0.2.1
  shared_preferences: ^2.0.8
+  sqlite3: any
  sqlite3_flutter_libs: ^0.5.8
  synchronized: ^3.0.0
  tuple: ^2.0.0
--- a/app/test/entity/sqlite_table_extension_test.dart
+++ b/app/test/entity/sqlite_table_extension_test.dart
@ -313,6 +313,7 @@ Future<void> _truncate() async {
      "accounts",
      "files",
      "images",
+      "image_locations",
      "trashes",
      "account_files",
      "dir_files",
--- a/app/test/mock_type.dart
+++ b/app/test/mock_type.dart
@ -181,6 +181,7 @@ class MockFileDataSource implements FileDataSource {
    OrNull<bool>? isArchived,
    OrNull<DateTime>? overrideDateTime,
    bool? favorite,
+    OrNull<ImageLocation>? location,
  }) {
    throw UnimplementedError();
  }
@ -272,6 +273,7 @@ class MockFileWebdavDataSource implements FileWebdavDataSource {
    OrNull<bool>? isArchived,
    OrNull<DateTime>? overrideDateTime,
    bool? favorite,
+    OrNull<ImageLocation>? location,
  }) =>
      src.updateProperty(
        account,
@ -280,6 +282,7 @@ class MockFileWebdavDataSource implements FileWebdavDataSource {
        isArchived: isArchived,
        overrideDateTime: overrideDateTime,
        favorite: favorite,
+        location: location,
      );

  final MockFileMemoryDataSource src;
--- a/app/test/test_util.dart
+++ b/app/test/test_util.dart
@ -447,6 +447,10 @@ Future<void> insertFiles(
      await db.into(db.images).insert(
          insert.image!.copyWith(accountFile: sql.Value(dbAccountFile.rowId)));
    }
+    if (insert.imageLocation != null) {
+      await db.into(db.imageLocations).insert(insert.imageLocation!
+          .copyWith(accountFile: sql.Value(dbAccountFile.rowId)));
+    }
    if (insert.trash != null) {
      await db
          .into(db.trashes)
@ -499,6 +503,8 @@ Future<Set<File>> listSqliteDbFiles(sql.SqliteDb db) async {
        db.accounts, db.accounts.rowId.equalsExp(db.accountFiles.account)),
    sql.leftOuterJoin(
        db.images, db.images.accountFile.equalsExp(db.accountFiles.rowId)),
+    sql.leftOuterJoin(db.imageLocations,
+        db.imageLocations.accountFile.equalsExp(db.accountFiles.rowId)),
    sql.leftOuterJoin(db.trashes, db.trashes.file.equalsExp(db.files.rowId)),
  ]);
  return (await query
@ -508,6 +514,7 @@ Future<Set<File>> listSqliteDbFiles(sql.SqliteDb db) async {
                  r.readTable(db.files),
                  r.readTable(db.accountFiles),
                  r.readTableOrNull(db.images),
+                  r.readTableOrNull(db.imageLocations),
                  r.readTableOrNull(db.trashes),
                ),
              ))
@ -523,6 +530,8 @@ Future<Map<File, Set<File>>> listSqliteDbDirs(sql.SqliteDb db) async {
        db.accounts, db.accounts.rowId.equalsExp(db.accountFiles.account)),
    sql.leftOuterJoin(
        db.images, db.images.accountFile.equalsExp(db.accountFiles.rowId)),
+    sql.leftOuterJoin(db.imageLocations,
+        db.imageLocations.accountFile.equalsExp(db.accountFiles.rowId)),
    sql.leftOuterJoin(db.trashes, db.trashes.file.equalsExp(db.files.rowId)),
  ]);
  final fileMap = Map.fromEntries(await query.map((r) {
@ -530,6 +539,7 @@ Future<Map<File, Set<File>>> listSqliteDbDirs(sql.SqliteDb db) async {
      r.readTable(db.files),
      r.readTable(db.accountFiles),
      r.readTableOrNull(db.images),
+      r.readTableOrNull(db.imageLocations),
      r.readTableOrNull(db.trashes),
    );
    return MapEntry(
@ -563,6 +573,7 @@ Future<Set<Album>> listSqliteDbAlbums(sql.SqliteDb db) async {
        r.readTable(db.accountFiles),
        null,
        null,
+        null,
      ),
    );
    return Tuple2(