Add friend tab

lib/models/user.dart

@@ -3,6 +3,7 @@ import 'dart:convert';
 import 'package:comunic/enums/user_page_visibility.dart';
 import 'package:comunic/helpers/serialization/base_serialization_helper.dart';
 import 'package:comunic/lists/custom_emojies_list.dart';
+import 'package:comunic/utils/account_utils.dart';
 import 'package:comunic/utils/ui_utils.dart';
 import 'package:meta/meta.dart';
 
@@ -44,6 +45,8 @@ class User implements SerializableElement<User> {
   bool get hasVirtualDirectory =>
       virtualDirectory != null && virtualDirectory.length > 0;
 
+  bool get isCurrentUser => id == userID();
+
   Map<String, dynamic> toJson() => {
         "id": id,
         "firstName": firstName,

lib/ui/screens/friends_list_screen.dart

@@ -20,6 +20,10 @@ import 'package:flutter/material.dart';
 enum _ErrorsLevel { NONE, MINOR, MAJOR }
 
 class FriendsListScreen extends StatefulWidget {
+  final bool showAppBar;
+
+  const FriendsListScreen({Key key, this.showAppBar = true}) : super(key: key);
+
   @override
   State<StatefulWidget> createState() => _FriendsListScreenState();
 }
@@ -103,9 +107,11 @@ class _FriendsListScreenState extends SafeState<FriendsListScreen> {
 
   @override
   Widget build(BuildContext context) => Scaffold(
-        appBar: AppBar(
+        appBar: widget.showAppBar
+            ? AppBar(
                 title: Text(tr("Your friends list")),
-        ),
+              )
+            : null,
         body: _buildBody(),
       );
 

lib/ui/screens/other_friends_lists_screen.dart

@@ -13,11 +13,14 @@ import 'package:flutter/material.dart';
 
 class OtherUserFriendsListScreen extends StatefulWidget {
   final int userID;
+  final bool enableAppBar;
 
   const OtherUserFriendsListScreen({
     Key key,
     @required this.userID,
+    this.enableAppBar = true,
   })  : assert(userID != null),
+        assert(enableAppBar != null),
         super(key: key);
 
   @override
@@ -74,9 +77,11 @@ class _OtherUserFriendsListScreenState
     if (_usersInfo == null) return buildCenteredProgressBar();
 
     return Scaffold(
-      appBar: AppBar(
+      appBar: widget.enableAppBar
+          ? AppBar(
               title: Text(_routeName),
-      ),
+            )
+          : null,
       body: ListView.builder(
         itemCount: _friendsList.length,
         itemBuilder: (c, i) => SimpleUserTile(

lib/ui/widgets/mobile_mode/user_page_mobile.dart

@@ -1,4 +1,6 @@
 import 'package:comunic/models/advanced_user_info.dart';
+import 'package:comunic/ui/screens/friends_list_screen.dart';
+import 'package:comunic/ui/screens/other_friends_lists_screen.dart';
 import 'package:comunic/ui/screens/user_page_sections/user_page_header.dart';
 import 'package:comunic/ui/screens/user_page_sections/user_posts_section.dart';
 import 'package:comunic/utils/intl_utils.dart';
@@ -36,7 +38,21 @@ class _UserMobilePageState extends State<UserMobilePage>
             user: widget.userInfo,
           ),
         ),
-      ];
+
+        // User friends
+        UserPageTab(
+            label: tr("Friends"),
+            onBuild: (c) => widget.userInfo.isCurrentUser
+                ? FriendsListScreen(
+                    showAppBar: false,
+                  )
+                : OtherUserFriendsListScreen(
+                    userID: widget.userInfo.id,
+                    enableAppBar: false,
+                  ),
+            visible: widget.userInfo.isFriendsListPublic ||
+                widget.userInfo.isCurrentUser),
+      ].where((element) => element.visible).toList();
 
   @override
   void initState() {
@@ -85,12 +101,15 @@ class _UserMobilePageState extends State<UserMobilePage>
 class UserPageTab {
   final String label;
   final WidgetBuilder onBuild;
+  final bool visible;
 
   UserPageTab({
     @required this.label,
     @required this.onBuild,
+    this.visible = true,
   })  : assert(label != null),
-        assert(onBuild != null);
+        assert(onBuild != null),
+        assert(visible != null);
 
   Tab get tab => Tab(text: label);
 }