Remove unnecessary constructor parameter from DeviceFolderGalleryWidget

lib/ui/device_folders_gallery_widget.dart

@@ -5,16 +5,13 @@ import 'package:photos/favorite_photos_repository.dart';
 import 'package:photos/models/device_folder.dart';
 import 'package:photos/models/filters/favorite_items_filter.dart';
 import 'package:photos/models/filters/folder_name_filter.dart';
-import 'package:photos/models/photo.dart';
 import 'package:photos/ui/device_folder_page.dart';
 import 'package:photos/ui/loading_widget.dart';
 import 'package:photos/ui/thumbnail_widget.dart';
 import 'package:path/path.dart' as p;
 
 class DeviceFolderGalleryWidget extends StatefulWidget {
-  final List<Photo> photos;
-
-  const DeviceFolderGalleryWidget(this.photos, {Key key}) : super(key: key);
+  const DeviceFolderGalleryWidget({Key key}) : super(key: key);
 
   @override
   _DeviceFolderGalleryWidgetState createState() =>

lib/ui/home_widget.dart

@@ -13,6 +13,7 @@ import 'package:photos/ui/device_folders_gallery_widget.dart';
 import 'package:photos/ui/gallery.dart';
 import 'package:photos/ui/gallery_app_bar_widget.dart';
 import 'package:photos/ui/loading_widget.dart';
+import 'package:photos/ui/remote_folder_gallery_widget.dart';
 import 'package:photos/utils/logging_util.dart';
 import 'package:shake/shake.dart';
 import 'package:logging/logging.dart';
@@ -74,7 +75,8 @@ class _HomeWidgetState extends State<HomeWidget> {
                     });
                   },
                 ),
-                DeviceFolderGalleryWidget(PhotoRepository.instance.photos)
+                DeviceFolderGalleryWidget(),
+                RemoteFolderGalleryWidget(),
               ],
               index: _selectedNavBarItem,
             );
@@ -99,6 +101,10 @@ class _HomeWidgetState extends State<HomeWidget> {
           icon: Icon(Icons.photo_library),
           title: Text('Gallery'),
         ),
+        BottomNavigationBarItem(
+          icon: Icon(Icons.folder_shared),
+          title: Text('Shared'),
+        ),
       ],
       currentIndex: _selectedNavBarItem,
       selectedItemColor: Colors.yellow[800],

lib/ui/remote_folder_gallery_widget.dart

@@ -0,0 +1,110 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/widgets.dart';
+import 'package:photos/db/photo_db.dart';
+import 'package:photos/favorite_photos_repository.dart';
+import 'package:photos/models/device_folder.dart';
+import 'package:photos/models/filters/favorite_items_filter.dart';
+import 'package:photos/models/filters/folder_name_filter.dart';
+import 'package:photos/ui/device_folder_page.dart';
+import 'package:photos/ui/loading_widget.dart';
+import 'package:photos/ui/thumbnail_widget.dart';
+import 'package:path/path.dart' as p;
+
+class RemoteFolderGalleryWidget extends StatefulWidget {
+  const RemoteFolderGalleryWidget({Key key}) : super(key: key);
+
+  @override
+  _RemoteFolderGalleryWidgetState createState() =>
+      _RemoteFolderGalleryWidgetState();
+}
+
+class _RemoteFolderGalleryWidgetState extends State<RemoteFolderGalleryWidget> {
+  @override
+  Widget build(BuildContext context) {
+    return FutureBuilder(
+      future: _getDeviceFolders(),
+      builder: (context, snapshot) {
+        if (snapshot.hasData) {
+          return _getDeviceFolderGalleryWidget(snapshot.data);
+        } else if (snapshot.hasError) {
+          return Text(snapshot.error.toString());
+        } else {
+          return loadWidget;
+        }
+      },
+    );
+  }
+
+  Widget _getDeviceFolderGalleryWidget(List<DeviceFolder> folders) {
+    return Container(
+      margin: EdgeInsets.only(top: 24),
+      child: GridView.builder(
+        shrinkWrap: true,
+        padding: EdgeInsets.only(bottom: 12),
+        physics: ScrollPhysics(), // to disable GridView's scrolling
+        itemBuilder: (context, index) {
+          return _buildFolder(context, folders[index]);
+        },
+        itemCount: folders.length,
+        gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
+          crossAxisCount: 2,
+        ),
+      ),
+    );
+  }
+
+  Future<List<DeviceFolder>> _getDeviceFolders() async {
+    final paths = await PhotoDB.instance.getDistinctPaths();
+    final folders = List<DeviceFolder>();
+    for (final path in paths) {
+      final photo = await PhotoDB.instance.getLatestPhotoInPath(path);
+      final folderName = p.basename(path);
+      folders
+          .add(DeviceFolder(folderName, photo, FolderNameFilter(folderName)));
+    }
+    folders.sort((first, second) {
+      return second.thumbnailPhoto.createTimestamp
+          .compareTo(first.thumbnailPhoto.createTimestamp);
+    });
+    if (FavoritePhotosRepository.instance.hasFavorites()) {
+      final photo = await PhotoDB.instance.getLatestPhotoAmongGeneratedIds(
+          FavoritePhotosRepository.instance.getLiked().toList());
+      folders.insert(
+          0, DeviceFolder("Favorites", photo, FavoriteItemsFilter()));
+    }
+    return folders;
+  }
+
+  Widget _buildFolder(BuildContext context, DeviceFolder folder) {
+    return GestureDetector(
+      child: Column(
+        children: <Widget>[
+          Container(
+            child: ThumbnailWidget(folder.thumbnailPhoto),
+            height: 150,
+            width: 150,
+          ),
+          Padding(padding: EdgeInsets.all(2)),
+          Expanded(
+            child: Text(
+              folder.name,
+              style: TextStyle(
+                fontSize: 16,
+              ),
+            ),
+          ),
+        ],
+      ),
+      onTap: () {
+        final page = DeviceFolderPage(folder);
+        Navigator.of(context).push(
+          MaterialPageRoute(
+            builder: (BuildContext context) {
+              return page;
+            },
+          ),
+        );
+      },
+    );
+  }
+}