Can get the list of friends of a user

lib/helpers/friends_helper.dart

@@ -9,7 +9,6 @@ import 'package:meta/meta.dart';
 /// @author Pierre HUBERT
 
 class FriendsHelper {
-
   final FriendsDatabaseHelper _friendsDatabaseHelper = FriendsDatabaseHelper();
 
   /// Get the list of friends of the user from the server
@@ -50,10 +49,8 @@ class FriendsHelper {
 
   /// Get the list, either from an online or an offline source
   Future<FriendsList> getList({@required bool online}) async {
-
-    if(online)
+    if (online)
       return await _downloadList();
-
     else
       return FriendsList()..addAll(await _friendsDatabaseHelper.getAll());
   }
@@ -77,10 +74,9 @@ class FriendsHelper {
         uri: "friends/setFollowing",
         needLogin: true,
         args: {
-        "friendID" : friendID.toString(),
+          "friendID": friendID.toString(),
           "follow": follow.toString()
-      }
-    ).exec();
+        }).exec();
 
     return response.code == 200;
   }
@@ -90,9 +86,24 @@ class FriendsHelper {
     final response = await APIRequest(
         uri: "friends/remove",
         needLogin: true,
-      args: {"friendID" : friendID.toString()}
-    ).exec();
+        args: {"friendID": friendID.toString()}).exec();
 
     return response.code == 200;
   }
+
+  /// Get and return the list of friends of an other user
+  ///
+  /// Throws an Exception if could not get the list of friends
+  Future<Set<int>> getOtherUserList(int userID) async {
+    final response = await APIRequest(
+      uri: "friends/get_user_list",
+      needLogin: true,
+      args: {"userID": userID.toString()},
+    ).exec();
+
+    if (response.code != 200)
+      throw new Exception("Could not get the list of friends of this user!");
+
+    return Set<int>.from(response.getArray());
+  }
 }

lib/ui/routes/other_friends_lists_route.dart

@@ -0,0 +1,114 @@
+import 'package:comunic/helpers/friends_helper.dart';
+import 'package:comunic/helpers/users_helper.dart';
+import 'package:comunic/lists/users_list.dart';
+import 'package:comunic/models/user.dart';
+import 'package:comunic/ui/tiles/simple_user_tile.dart';
+import 'package:comunic/utils/intl_utils.dart';
+import 'package:comunic/utils/navigation_utils.dart';
+import 'package:comunic/utils/ui_utils.dart';
+import 'package:flutter/material.dart';
+
+/// Other friends list route (not intended to display current user friends list)
+///
+/// @author Pierre HUBERT
+
+class OtherUserFriendsListRoute extends StatefulWidget {
+  final User user;
+
+  const OtherUserFriendsListRoute({
+    Key key,
+    @required this.user,
+  })  : assert(user != null),
+        super(key: key);
+
+  @override
+  _OtherUserFriendsListRouteState createState() =>
+      _OtherUserFriendsListRouteState();
+}
+
+class _OtherUserFriendsListRouteState extends State<OtherUserFriendsListRoute> {
+  final FriendsHelper friendsHelper = FriendsHelper();
+  final UsersHelper usersHelper = UsersHelper();
+
+  UsersList _list;
+  bool _error = false;
+
+  String get _routeName =>
+      tr("Friends of %name%", args: {"name": widget.user.displayName});
+
+  void setError(bool e) => setState(() => _error = e);
+
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    load();
+  }
+
+  /// Load the list of friends of the user
+  Future<void> load() async {
+    setError(false);
+
+    try {
+      final list = await usersHelper.getListWithThrow(
+          await friendsHelper.getOtherUserList(widget.user.id));
+
+      setState(() {
+        _list = list;
+      });
+    } catch (e, st) {
+      print(e);
+      print(st);
+      setError(true);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (_error) return _buildError();
+
+    if (_list == null)
+      return buildLoadingPage(
+        showAppBar: true,
+        routeTitle: _routeName,
+      );
+
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(_routeName),
+      ),
+      body: ListView.builder(
+        itemCount: _list.length,
+        itemBuilder: (c, i) => SimpleUserTile(
+              user: _list[i],
+              onTap: (u) => openUserPage(
+                    context: context,
+                    userID: u.id,
+                  ),
+            ),
+      ),
+    );
+  }
+
+  Widget _buildError() {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(_routeName),
+      ),
+      body: buildErrorCard(
+        tr(
+          "Could not get the list of friends of %name% !",
+          args: {"name": widget.user.displayName},
+        ),
+        actions: [
+          FlatButton(
+            child: Text(
+              tr("Try again").toUpperCase(),
+              style: TextStyle(color: Colors.white),
+            ),
+            onPressed: load,
+          )
+        ],
+      ),
+    );
+  }
+}

lib/ui/routes/user_page_route.dart

@@ -1,8 +1,10 @@
 import 'package:comunic/helpers/posts_helper.dart';
 import 'package:comunic/helpers/users_helper.dart';
 import 'package:comunic/models/advanced_user_info.dart';
+import 'package:comunic/ui/routes/other_friends_lists_route.dart';
 import 'package:comunic/ui/widgets/network_image_widget.dart';
 import 'package:comunic/ui/widgets/posts_list_widget.dart';
+import 'package:comunic/utils/conversations_utils.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:comunic/utils/ui_utils.dart';
 import 'package:flutter/material.dart';
@@ -13,6 +15,8 @@ import 'package:flutter/material.dart';
 
 enum _PageStatus { LOADING, ERROR, READY }
 
+enum _MenuOptions { FRIENDS_LIST }
+
 class UserPageRoute extends StatefulWidget {
   final int userID;
 
@@ -105,6 +109,7 @@ class _UserPageRouteState extends State<UserPageRoute> {
             NetworkImageWidget(
               url: _userInfo.accountImageURL,
               height: _appBarHeight,
+              roundedEdges: false,
             ),
             // This gradient ensures that the toolbar icons are distinct
             // against the background image.
@@ -130,6 +135,26 @@ class _UserPageRouteState extends State<UserPageRoute> {
           ],
         ),
       ),
+      actions: <Widget>[
+        IconButton(
+          icon: Icon(
+            Icons.chat,
+          ),
+          onPressed: () {
+            openPrivateConversation(context, widget.userID);
+          },
+        ),
+        PopupMenuButton<_MenuOptions>(
+          itemBuilder: (c) => [
+                PopupMenuItem(
+                  child: Text(tr("Friends")),
+                  enabled: _userInfo != null,
+                  value: _MenuOptions.FRIENDS_LIST,
+                )
+              ],
+          onSelected: _selectedMenuOption,
+        ),
+      ],
     );
   }
 
@@ -146,4 +171,19 @@ class _UserPageRouteState extends State<UserPageRoute> {
       ),
     );
   }
+
+  /// Method called each time a menu option is selected
+  void _selectedMenuOption(_MenuOptions value) {
+    switch (value) {
+      case _MenuOptions.FRIENDS_LIST:
+        Navigator.of(context).push(
+          MaterialPageRoute(
+            builder: (c) => OtherUserFriendsListRoute(
+                  user: _userInfo,
+                ),
+          ),
+        );
+        break;
+    }
+  }
 }

lib/utils/ui_utils.dart

@@ -14,8 +14,16 @@ Widget buildCenteredProgressBar() {
 }
 
 /// Build and return a full loading page
-Widget buildLoadingPage() {
+Widget buildLoadingPage({
+  bool showAppBar = false,
+  String routeTitle,
+}) {
   return Scaffold(
+    appBar: showAppBar
+        ? AppBar(
+            title: Text(routeTitle),
+          )
+        : null,
     body: buildCenteredProgressBar(),
   );
 }