import 'package:comunic/helpers/friends_helper.dart'; import 'package:comunic/helpers/users_helper.dart'; import 'package:comunic/lists/friends_list.dart'; import 'package:comunic/lists/users_list.dart'; import 'package:comunic/models/friend.dart'; import 'package:comunic/ui/tiles/accepted_friend_tile.dart'; import 'package:comunic/ui/tiles/pending_friend_tile.dart'; import 'package:comunic/ui/widgets/safe_state.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'; /// Friends list screen /// /// Display the list of friends of the current user /// /// @author Pierre HUBERT enum _ErrorsLevel { NONE, MINOR, MAJOR } class FriendsListScreen extends StatefulWidget { @override State createState() => _FriendsListScreenState(); } class _FriendsListScreenState extends SafeState { /// Helpers final _friendsHelper = FriendsHelper(); final _usersHelper = UsersHelper(); /// Widget members _ErrorsLevel _error = _ErrorsLevel.NONE; FriendsList _friendsList; UsersList _usersInfo; GlobalKey _refreshIndicatorKey = GlobalKey(); /// Useful setters set error(_ErrorsLevel err) => setState(() => _error = err); void _gotError() { error = _friendsList == null ? _ErrorsLevel.MAJOR : _ErrorsLevel.MINOR; } @override void didChangeDependencies() { super.didChangeDependencies(); _getList(); } /// Initialize list retrieving Future _getList() async { await _loadList(false); await _loadList(true); } /// Refresh the list of friends Future _refreshList() async { await _refreshIndicatorKey.currentState.show(); } /// Load the list of friends Future _loadList(bool online) async { error = _ErrorsLevel.NONE; // Get the list of friends final list = await _friendsHelper.getList(online: online); // Check if there is no cache yet if (!online && list.isEmpty) return; // Check for errors if (list == null) return _gotError(); // Get information about related users final users = await _usersHelper.getUsersInfo(list.usersId); // Check for errors if (users == null) return _gotError(); // Apply new information setState(() { _friendsList = list..sort(); _usersInfo = users; }); error = _ErrorsLevel.NONE; } /// Build and return loading error Widget _buildError() => buildErrorCard( tr("Could not load your list of friends!"), actions: [ TextButton( onPressed: _refreshList, child: Text( tr("Retry").toUpperCase(), style: TextStyle(color: Colors.white), ), ), ], ); @override Widget build(BuildContext context) => Scaffold( appBar: AppBar( title: Text(tr("Your friends list")), ), body: _buildBody(), ); Widget _buildBody() { if (_error == _ErrorsLevel.MAJOR) return _buildError(); if (_friendsList == null) return buildCenteredProgressBar(); return Column( children: [ // Check for errors Container(child: _error != _ErrorsLevel.NONE ? _buildError() : null), // List of friends Expanded( child: RefreshIndicator( key: _refreshIndicatorKey, onRefresh: () => _loadList(true), child: ListView.builder( physics: AlwaysScrollableScrollPhysics(), itemCount: _friendsList.length, itemBuilder: (c, i) => _friendsList[i].accepted ? AcceptedFriendTile( friend: _friendsList[i], user: _usersInfo.getUser(_friendsList[i].id), onOpenPrivateConversation: _openPrivateConversation, onSetFollowing: _setFollowingFriend, onRequestDelete: _deleteFriend, ) : PendingFriendTile( friend: _friendsList[i], user: _usersInfo.getUser(_friendsList[i].id), onRespond: _respondRequest, )), ), ), ], ); } /// Respond to friendship request Future _respondRequest(Friend f, bool accept) async { if (!await _friendsHelper.respondRequest(f.id, accept)) showSimpleSnack(context, tr("Could not respond to friendship request!")); // Load the list of friends again _refreshList(); } /// Update following status of a friend Future _setFollowingFriend(Friend friend, bool follow) async { if (!await _friendsHelper.setFollowing(friend.id, follow)) showSimpleSnack(context, tr("Could not update following status!")); _refreshList(); } /// Handles deletion request of a friend Future _deleteFriend(Friend f) async { final choice = await showDialog( 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: [ TextButton( onPressed: () => Navigator.pop(context, false), child: Text(tr("Cancel").toUpperCase()), ), TextButton( 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 if (!await _friendsHelper.removeFriend(f.id)) showSimpleSnack( context, tr("Could not delete this person from your friends list!")); // Refresh list _refreshList(); } /// Open a private conversation for a given [friend] Future _openPrivateConversation(Friend friend) async { await openPrivateConversation(context, friend.id); } }