371 lines
12 KiB
Dart
371 lines
12 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:stream_chat_flutter/stream_chat_flutter.dart';
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import 'chips_input_text_field.dart';
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import 'main.dart';
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import 'new_group_chat_screen.dart';
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import 'routes/routes.dart';
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class NewChatScreen extends StatefulWidget {
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@override
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_NewChatScreenState createState() => _NewChatScreenState();
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}
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class _NewChatScreenState extends State<NewChatScreen> {
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final _chipInputTextFieldStateKey =
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GlobalKey<ChipInputTextFieldState<User>>();
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TextEditingController _controller;
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ChipInputTextFieldState get _chipInputTextFieldState =>
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_chipInputTextFieldStateKey.currentState;
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String _userNameQuery = '';
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final _selectedUsers = <User>{};
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final _searchFocusNode = FocusNode();
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final _messageInputFocusNode = FocusNode();
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bool _isSearchActive = false;
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Channel channel;
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Timer _debounce;
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bool _showUserList = true;
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bool _channelExisted = false;
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void _userNameListener() {
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if (_debounce?.isActive ?? false) _debounce.cancel();
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_debounce = Timer(const Duration(milliseconds: 350), () {
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if (mounted)
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setState(() {
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_userNameQuery = _controller.text;
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_isSearchActive = _userNameQuery.isNotEmpty;
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});
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});
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}
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@override
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void initState() {
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super.initState();
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channel = StreamChat.of(context).client.channel('messaging');
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_controller = TextEditingController()..addListener(_userNameListener);
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_searchFocusNode.addListener(() async {
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if (_searchFocusNode.hasFocus && !_showUserList) {
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setState(() {
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_showUserList = true;
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});
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}
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});
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_messageInputFocusNode.addListener(() async {
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if (_messageInputFocusNode.hasFocus && _selectedUsers.isNotEmpty) {
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final chatState = StreamChat.of(context);
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final res = await chatState.client.queryChannels(
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options: {
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'state': false,
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'watch': false,
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},
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filter: {
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'members': [
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..._selectedUsers.map((e) => e.id),
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chatState.user.id,
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],
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'distinct': true,
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},
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messageLimit: 0,
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paginationParams: PaginationParams(
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limit: 1,
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),
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).first;
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final _channelExisted = res.length == 1;
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if (_channelExisted) {
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channel = res.first;
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await channel.watch();
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} else {
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channel = chatState.client.channel(
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'messaging',
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extraData: {
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'members': [
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..._selectedUsers.map((e) => e.id),
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chatState.user.id,
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],
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},
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);
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}
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setState(() {
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_showUserList = false;
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});
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}
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});
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}
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@override
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void dispose() {
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_searchFocusNode.dispose();
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_messageInputFocusNode.dispose();
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_controller?.clear();
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_controller?.removeListener(_userNameListener);
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_controller?.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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backgroundColor: Color.fromRGBO(252, 252, 252, 1),
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appBar: AppBar(
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elevation: 0,
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backgroundColor: Colors.white,
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leading: const StreamBackButton(),
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title: Text(
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'New Chat',
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style: TextStyle(
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color: Colors.black,
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fontSize: 16,
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),
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),
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centerTitle: true,
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),
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body: StreamChannel(
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showLoading: false,
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channel: channel,
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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ChipsInputTextField<User>(
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key: _chipInputTextFieldStateKey,
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controller: _controller,
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focusNode: _searchFocusNode,
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chipBuilder: (context, user) {
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return GestureDetector(
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onTap: () {
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_chipInputTextFieldState.removeItem(user);
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_searchFocusNode.requestFocus();
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},
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child: Stack(
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alignment: AlignmentDirectional.centerStart,
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children: [
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Container(
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decoration: BoxDecoration(
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color: Colors.black.withOpacity(0.05),
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borderRadius: BorderRadius.circular(12),
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),
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padding: const EdgeInsets.only(left: 24),
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child: Padding(
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padding: const EdgeInsets.fromLTRB(8, 4, 12, 4),
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child: Text(
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user.name,
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style: TextStyle(color: Colors.black),
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),
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),
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),
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Opacity(
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opacity: .8,
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child: UserAvatar(
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showOnlineStatus: false,
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user: user,
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constraints: BoxConstraints.tightFor(
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height: 24,
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width: 24,
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),
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),
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),
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Positioned(
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child: StreamSvgIcon.close(
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color: Colors.white,
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),
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),
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],
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),
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);
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},
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onChipAdded: (user) {
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setState(() => _selectedUsers.add(user));
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},
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onChipRemoved: (user) {
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setState(() => _selectedUsers.remove(user));
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},
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),
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if (!_isSearchActive && !_selectedUsers.isNotEmpty)
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Container(
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child: InkWell(
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onTap: () {
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Navigator.pushNamed(
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context,
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Routes.NEW_GROUP_CHAT,
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);
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},
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child: Padding(
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padding: const EdgeInsets.symmetric(vertical: 8),
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child: Row(
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children: [
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StreamNeumorphicButton(
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child: Center(
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child: StreamSvgIcon.contacts(
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color: Color(0xFF006CFF),
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size: 24,
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),
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),
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),
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SizedBox(width: 8),
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Text(
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'Create a Group',
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style: TextStyle(
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fontWeight: FontWeight.bold,
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fontSize: 16,
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),
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),
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],
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),
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),
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),
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),
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if (_showUserList)
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Container(
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width: double.maxFinite,
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decoration: BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.centerLeft,
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end: Alignment.centerRight,
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colors: [
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Colors.black.withOpacity(0.02),
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Colors.white.withOpacity(0.05),
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],
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stops: [0, 1],
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),
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),
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child: Padding(
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padding: const EdgeInsets.symmetric(
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vertical: 8,
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horizontal: 8,
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),
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child: Text(
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_isSearchActive
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? "Matches for \"$_userNameQuery\""
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: 'On the platform',
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style: TextStyle(
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color: Colors.black.withOpacity(0.5),
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),
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),
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),
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),
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Expanded(
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child: _showUserList
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? GestureDetector(
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behavior: HitTestBehavior.opaque,
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onPanDown: (_) => FocusScope.of(context).unfocus(),
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child: UsersBloc(
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child: UserListView(
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selectedUsers: _selectedUsers,
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groupAlphabetically: _isSearchActive ? false : true,
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onUserTap: (user, _) {
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_controller.clear();
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if (!_selectedUsers.contains(user)) {
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_chipInputTextFieldState
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..addItem(user)
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..pauseItemAddition();
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} else {
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_chipInputTextFieldState.removeItem(user);
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}
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},
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pagination: PaginationParams(
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limit: 25,
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),
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filter: {
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if (_userNameQuery.isNotEmpty)
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'name': {
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r'$autocomplete': _userNameQuery,
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},
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'id': {
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r'$ne': StreamChat.of(context).user.id,
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},
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},
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sort: [
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SortOption(
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'name',
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direction: 1,
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),
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],
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emptyBuilder: (_) {
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return LayoutBuilder(
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builder: (context, viewportConstraints) {
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return SingleChildScrollView(
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physics: AlwaysScrollableScrollPhysics(),
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child: ConstrainedBox(
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constraints: BoxConstraints(
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minHeight: viewportConstraints.maxHeight,
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),
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child: Center(
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child: Column(
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children: [
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Padding(
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padding: const EdgeInsets.all(24),
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child: StreamSvgIcon.search(
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size: 96,
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color: Colors.grey,
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),
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),
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Text(
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'No user matches these keywords...'),
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],
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),
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),
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),
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);
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},
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);
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},
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),
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),
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)
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: FutureBuilder<bool>(
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future: channel.initialized,
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builder: (context, snapshot) {
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if (snapshot.data == true) {
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return MessageListView();
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}
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return Center(
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child: Text(
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'No chats here yet...',
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style: TextStyle(
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fontSize: 12,
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color: Colors.black.withOpacity(.5),
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),
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),
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);
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},
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),
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),
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MessageInput(
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focusNode: _messageInputFocusNode,
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preMessageSending: (message) async {
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await channel.watch();
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return message;
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},
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onMessageSent: (m) {
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Navigator.pushNamedAndRemoveUntil(
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context,
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Routes.CHANNEL_PAGE,
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ModalRoute.withName(Routes.HOME),
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arguments: ChannelPageArgs(channel: channel),
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);
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},
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),
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],
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),
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),
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);
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}
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}
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