comunicmobile/lib/ui/screens/user_access_denied_screen.dart

import 'package:comunic/helpers/friends_helper.dart';
import 'package:comunic/helpers/users_helper.dart';
import 'package:comunic/models/friend_status.dart';
import 'package:comunic/models/user.dart';
import 'package:comunic/ui/routes/main_route/main_route.dart';
import 'package:comunic/ui/widgets/FrienshipStatusWidget.dart';
import 'package:comunic/ui/widgets/account_image_widget.dart';
import 'package:comunic/utils/intl_utils.dart';
import 'package:comunic/utils/ui_utils.dart';
import 'package:flutter/material.dart';

/// User access denied screen
///
/// @author Pierre HUBERT

class UserAccessDeniedScreen extends StatefulWidget {
  final int userID;

  const UserAccessDeniedScreen({Key key, @required this.userID})
      : assert(userID != null),
        super(key: key);

  @override
  _UserAccessDeniedScreenState createState() => _UserAccessDeniedScreenState();
}

class _UserAccessDeniedScreenState extends State<UserAccessDeniedScreen> {
  final UsersHelper usersHelper = UsersHelper();
  final FriendsHelper friendsHelper = FriendsHelper();

  GlobalKey<RefreshIndicatorState> _refreshIndicatorKey =
      GlobalKey<RefreshIndicatorState>();

  FriendStatus _status;
  User _user;
  bool _error = false;

  void setError(bool e) => setState(() => _error = e);

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    refresh();
  }

  Future<void> refresh() async {
    try {
      final status = await friendsHelper.getFriendshipStatus(widget.userID);
      final user = await usersHelper.getSingleWithThrow(widget.userID);

      // Check if the two users are friend now
      if (status.areFriend) {
        final controller = MainController.of(context);
        controller.popPage();
        controller.openUserPage(widget.userID);
      }

      setState(() {
        _status = status;
        _user = user;
      });
    } catch (e) {
      setError(true);
    }
  }

  @override
  Widget build(BuildContext context) {
    if (!_error && _status == null) return buildLoadingPage(showAppBar: true);

    return Scaffold(
      appBar: AppBar(
        title: Text(_error ? "Error" : _user.displayName),
      ),
      body: RefreshIndicator(
        key: _refreshIndicatorKey,
        onRefresh: refresh,
        child: ListView.builder(
          itemBuilder: (c, i) => _scrollBuild(),
          itemCount: 1,
        ),
      ),
    );
  }

  Widget _scrollBuild() {
    if (_error) return _buildError();

    return _buildPage();
  }

  Widget _buildError() {
    return buildErrorCard("Could get information about your friendship!");
  }

  Widget _buildPage() {
    return Center(
      child: Column(
        children: <Widget>[
          AccountImageWidget(
            user: _user,
            width: 75,
          ),
          Text(
            _user.displayName,
            style: TextStyle(fontSize: 25.0),
          ),
          Text(tr("This account is private.")),
          FriendshipStatusWidget(
            status: _status,
            onFriendshipUpdated: () => _refreshIndicatorKey.currentState.show(),
          )
        ],
      ),
    );
  }
}