Implement location search

lib/db/photo_db.dart

@@ -20,6 +20,8 @@ class PhotoDB {
   static final columnLocalId = 'local_id';
   static final columnTitle = 'title';
   static final columnDeviceFolder = 'device_folder';
+  static final columnLatitude = 'latitude';
+  static final columnLongitude = 'longitude';
   static final columnRemoteFolderId = 'remote_folder_id';
   static final columnRemotePath = 'remote_path';
   static final columnThumbnailPath = 'thumbnail_path';
@@ -57,6 +59,8 @@ class PhotoDB {
             $columnUploadedFileId INTEGER NOT NULL,
             $columnTitle TEXT NOT NULL,
             $columnDeviceFolder TEXT NOT NULL,
+            $columnLatitude REAL,
+            $columnLongitude REAL,
             $columnRemoteFolderId INTEGER DEFAULT -1,
             $columnRemotePath TEXT,
             $columnThumbnailPath TEXT,
@@ -283,6 +287,8 @@ class PhotoDB {
         photo.uploadedFileId == null ? -1 : photo.uploadedFileId;
     row[columnTitle] = photo.title;
     row[columnDeviceFolder] = photo.deviceFolder;
+    row[columnLatitude] = photo.latitude;
+    row[columnLongitude] = photo.longitude;
     row[columnRemoteFolderId] = photo.remoteFolderId;
     row[columnRemotePath] = photo.remotePath;
     row[columnThumbnailPath] = photo.thumbnailPath;
@@ -298,6 +304,8 @@ class PhotoDB {
     photo.uploadedFileId = row[columnUploadedFileId];
     photo.title = row[columnTitle];
     photo.deviceFolder = row[columnDeviceFolder];
+    photo.latitude = row[columnLatitude];
+    photo.longitude = row[columnLongitude];
     photo.remoteFolderId = row[columnRemoteFolderId];
     photo.remotePath = row[columnRemotePath];
     photo.thumbnailPath = row[columnThumbnailPath];

lib/models/photo.dart

@@ -18,6 +18,8 @@ class Photo {
   String thumbnailPath;
   int createTimestamp;
   int updateTimestamp;
+  double latitude;
+  double longitude;
 
   Photo();
   Photo.fromJson(Map<String, dynamic> json)
@@ -37,6 +39,9 @@ class Photo {
     photo.localId = asset.id;
     photo.title = asset.title;
     photo.deviceFolder = pathEntity.name;
+    final location = await asset.latlngAsync();
+    photo.latitude = location.latitude;
+    photo.longitude = location.longitude;
     photo.createTimestamp = asset.createDateTime.microsecondsSinceEpoch;
     if (photo.createTimestamp == 0) {
       try {

lib/ui/location_search_results_page.dart

@@ -0,0 +1,73 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:latlong/latlong.dart';
+import 'package:photos/models/photo.dart';
+import 'package:photos/photo_repository.dart';
+import 'package:photos/ui/gallery.dart';
+import 'package:photos/ui/loading_widget.dart';
+
+class LocationSearchResultsPage extends StatefulWidget {
+  final LatLng location;
+  final String name;
+
+  LocationSearchResultsPage(this.location, this.name, {Key key})
+      : super(key: key);
+
+  @override
+  _LocationSearchResultsPageState createState() =>
+      _LocationSearchResultsPageState();
+}
+
+class _LocationSearchResultsPageState extends State<LocationSearchResultsPage> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.name),
+      ),
+      body: Container(
+        child: _getBody(),
+      ),
+    );
+  }
+
+  FutureBuilder<List<Photo>> _getBody() {
+    return FutureBuilder<List<Photo>>(
+      future: _getResult(),
+      builder: (context, snapshot) {
+        if (snapshot.hasData) {
+          return Gallery(
+            snapshot.data,
+            Set<Photo>(),
+          );
+        } else {
+          return Center(child: loadWidget);
+        }
+      },
+    );
+  }
+
+  Future<List<Photo>> _getResult() async {
+    final photos = PhotoRepository.instance.photos;
+    final args = Map<String, dynamic>();
+    args['photos'] = photos;
+    args['location'] = widget.location;
+    args['maxDistance'] = 5000;
+    return await compute(_filterPhotos, args);
+  }
+
+  static List<Photo> _filterPhotos(Map<String, dynamic> args) {
+    List<Photo> photos = args['photos'];
+    LatLng location = args['location'];
+    int maxDistance = args['maxDistance'];
+    final result = List<Photo>();
+    for (final photo in photos) {
+      final distance = Distance().as(LengthUnit.Meter, location,
+          new LatLng(photo.latitude, photo.longitude));
+      if (distance < maxDistance) {
+        result.add(photo);
+      }
+    }
+    return result;
+  }
+}

lib/ui/search_page.dart

@@ -1,12 +1,18 @@
+import 'dart:developer';
+
 import 'package:dio/dio.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_typeahead/flutter_typeahead.dart';
+import 'package:latlong/latlong.dart';
 import 'package:photos/core/configuration.dart';
 import 'package:photos/face_search_manager.dart';
 import 'package:photos/models/face.dart';
+import 'package:photos/models/photo.dart';
+import 'package:photos/photo_repository.dart';
 import 'package:photos/ui/circular_network_image_widget.dart';
 import 'package:photos/ui/face_search_results_page.dart';
 import 'package:photos/ui/loading_widget.dart';
+import 'package:photos/ui/location_search_results_page.dart';
 
 class SearchPage extends StatefulWidget {
   @override
@@ -55,8 +61,14 @@ class _SearchPageState extends State<SearchPage> {
             return LocationSearchResultWidget(suggestion['name']);
           },
           onSuggestionSelected: (suggestion) {
-            // Navigator.of(context).push(MaterialPageRoute(
-            //     builder: (context) => ProductPage(product: suggestion)));
+            double latitude = suggestion['geometry']['location']['lat'];
+            double longitude = suggestion['geometry']['location']['lng'];
+            Navigator.pop(context);
+            Navigator.of(context).push(MaterialPageRoute(
+                builder: (context) => LocationSearchResultsPage(
+                      new LatLng(latitude, longitude),
+                      suggestion['name'],
+                    )));
           },
         ),
         actions: <Widget>[
@@ -108,9 +120,8 @@ class _SearchPageState extends State<SearchPage> {
   }
 
   void _routeToSearchResults(Face face, BuildContext context) {
-    final page = FaceSearchResultsPage(
-      face: face,
-    );
+    final page = FaceSearchResultsPage(face);
+    Navigator.pop(context);
     Navigator.of(context).push(
       MaterialPageRoute(
         builder: (BuildContext context) {

pubspec.lock

@@ -1,6 +1,13 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  ansicolor:
+    dependency: transitive
+    description:
+      name: ansicolor
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.2"
   archive:
     dependency: "direct main"
     description:
@@ -64,6 +71,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.5"
+  console_log_handler:
+    dependency: transitive
+    description:
+      name: console_log_handler
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.6"
   convert:
     dependency: transitive
     description:
@@ -212,6 +226,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.1"
+  latlong:
+    dependency: "direct main"
+    description:
+      name: latlong
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.6.1"
   like_button:
     dependency: "direct main"
     description:
@@ -483,6 +504,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.4.1"
+  validate:
+    dependency: transitive
+    description:
+      name: validate
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.7.0"
   vector_math:
     dependency: transitive
     description:

pubspec.yaml

@@ -48,6 +48,7 @@ dependencies:
   logging: ^0.11.4
   flutter_image_compress: ^0.6.5+1
   flutter_typeahead: ^1.8.1
+  latlong: ^0.6.1
 
 dev_dependencies:
   flutter_test: