Can remove a friend from the list of friends

lib/helpers/friends_helper.dart

@@ -51,4 +51,15 @@ class FriendsHelper {
 
     return response.code == 200;
   }
+
+  /// Remove a friend from the list
+  Future<bool> removeFriend(int friendID) async {
+    final response = await APIRequest(
+      uri: "friends/remove",
+      needLogin: true,
+      args: {"friendID" : friendID.toString()}
+    ).exec();
+
+    return response.code == 200;
+  }
 }

lib/ui/screens/friends_list_screen.dart

@@ -39,8 +39,10 @@ class _FriendsListScreenState extends SafeState<FriendsListScreen> {
 
   set loading(bool loading) => setState(() => _loading = loading);
 
-  void _gotError() =>
+  void _gotError() {
+    loading = false;
     error = _friendsList == null ? _ErrorsLevel.MAJOR : _ErrorsLevel.MINOR;
+  }
 
   @override
   void didChangeDependencies() {
@@ -109,6 +111,7 @@ class _FriendsListScreenState extends SafeState<FriendsListScreen> {
                   ? AcceptedFriendTile(
                       friend: _friendsList[i],
                       user: _usersInfo.getUser(_friendsList[i].id),
+                      onRequestDelete: _deleteFriend,
                     )
                   : PendingFriendTile(
                       friend: _friendsList[i],
@@ -125,10 +128,45 @@ class _FriendsListScreenState extends SafeState<FriendsListScreen> {
     loading = true;
 
     if (!await _friendsHelper.respondRequest(f.id, accept))
-      Scaffold.of(context).showSnackBar(SnackBar(
+      showSimpleSnack(context, tr("Could not respond to friendship request!"));
-          content: Text(tr("Could not respond to friendship request!"))));
 
     // Load the list of friends again
     _loadList();
   }
+
+  /// Handles deletion request of a friend
+  Future<void> _deleteFriend(Friend f) async {
+    final choice = await showDialog<bool>(
+      context: context,
+      builder: (b) => AlertDialog(
+            title: Text(tr("Delete friend")),
+            content: Text(tr(
+                "Are you sure do you want to remove this friend from your list of friends ? A friendship request will have to be sent to get this user back to your list!")),
+            actions: <Widget>[
+              FlatButton(
+                onPressed: () => Navigator.pop(context, false),
+                child: Text(tr("Cancel").toUpperCase()),
+              ),
+              FlatButton(
+                onPressed: () => Navigator.pop(context, true),
+                child: Text(
+                  tr("Confirm").toUpperCase(),
+                  style: TextStyle(color: Colors.red),
+                ),
+              ),
+            ],
+          ),
+    );
+
+    if (choice == null || !choice) return;
+
+    // Forward the request to the server
+    loading = true;
+    if (!await _friendsHelper.removeFriend(f.id))
+      showSimpleSnack(
+          context, tr("Could not delete this person from your friends list!"));
+
+    // Refresh list
+    _loadList();
+  }
 }

lib/ui/tiles/accepted_friend_tile.dart

@@ -9,14 +9,23 @@ import 'package:flutter/material.dart';
 ///
 /// @author Pierre HUBERT
 
+enum _FriendMenuChoices { REMOVE }
+
+typedef OnRequestDeleteFriend = void Function(Friend);
+
 class AcceptedFriendTile extends StatelessWidget {
   final Friend friend;
   final User user;
+  final OnRequestDeleteFriend onRequestDelete;
 
   const AcceptedFriendTile(
-      {Key key, @required this.friend, @required this.user})
+      {Key key,
+      @required this.friend,
+      @required this.user,
+      @required this.onRequestDelete})
       : assert(friend != null),
         assert(user != null),
+        assert(onRequestDelete != null),
         super(key: key);
 
   @override
@@ -34,6 +43,26 @@ class AcceptedFriendTile extends StatelessWidget {
           : Text(
               diffTimeFromNowToStr(friend.lastActive),
             ),
+      trailing: PopupMenuButton<_FriendMenuChoices>(
+        itemBuilder: (c) => [
+              PopupMenuItem(
+                child: Text(tr("Remove")),
+                value: _FriendMenuChoices.REMOVE,
+              )
+            ],
+        onSelected: _selectedMenuOption,
+      ),
     );
   }
+
+  void _selectedMenuOption(_FriendMenuChoices value) {
+    if (value == null) return;
+
+    switch (value) {
+      //Delete friend
+      case _FriendMenuChoices.REMOVE:
+        onRequestDelete(friend);
+        break;
+    }
+  }
 }

lib/utils/ui_utils.dart

@@ -60,3 +60,9 @@ void showImageFullScreen(BuildContext context, String url) {
 
   }));
 }
+
+
+/// Show simple snack
+void showSimpleSnack(BuildContext context, String message) {
+  Scaffold.of(context).showSnackBar(SnackBar(content: Text(message)));
+}