Gordon Hayes
411 lines
16 KiB
Dart
411 lines
16 KiB
Dart
import 'dart:async';
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import 'package:example/localizations.dart';
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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 'channel_page.dart';
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import 'chips_input_text_field.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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late 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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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.queryChannelsOnline(
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state: false,
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watch: false,
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filter: Filter.raw(value: {
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'members': [
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..._selectedUsers.map((e) => e.id),
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chatState.currentUser!.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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);
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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.currentUser!.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: StreamChatTheme.of(context).colorTheme.appBg,
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appBar: AppBar(
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elevation: 0,
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backgroundColor: StreamChatTheme.of(context).colorTheme.barsBg,
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leading: const StreamBackButton(),
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title: Text(
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AppLocalizations.of(context).newChat,
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style: StreamChatTheme.of(context).textTheme.headlineBold.copyWith(
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color: StreamChatTheme.of(context).colorTheme.textHighEmphasis),
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),
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centerTitle: true,
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),
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body: ConnectionStatusBuilder(
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statusBuilder: (context, status) {
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String statusString = '';
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bool showStatus = true;
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switch (status) {
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case ConnectionStatus.connected:
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statusString = AppLocalizations.of(context).connected;
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showStatus = false;
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break;
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case ConnectionStatus.connecting:
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statusString = AppLocalizations.of(context).reconnecting;
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break;
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case ConnectionStatus.disconnected:
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statusString = AppLocalizations.of(context).disconnected;
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break;
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}
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return InfoTile(
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showMessage: showStatus,
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tileAnchor: Alignment.topCenter,
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childAnchor: Alignment.topCenter,
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message: statusString,
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child: 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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hint: AppLocalizations.of(context).typeANameHint,
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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: StreamChatTheme.of(context)
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.colorTheme
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.disabled,
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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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maxLines: 1,
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style: TextStyle(
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color: StreamChatTheme.of(context)
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.colorTheme
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.textHighEmphasis,
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),
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),
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),
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),
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Container(
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foregroundDecoration: BoxDecoration(
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color: StreamChatTheme.of(context)
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.colorTheme
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.overlay,
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shape: BoxShape.circle,
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),
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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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StreamSvgIcon.close(),
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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: StreamChatTheme.of(context)
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.colorTheme
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.accentPrimary,
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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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AppLocalizations.of(context).createAGroup,
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style: StreamChatTheme.of(context)
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.textTheme
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.bodyBold,
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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:
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StreamChatTheme.of(context).colorTheme.bgGradient,
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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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? '${AppLocalizations.of(context).matchesFor} "$_userNameQuery"'
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: AppLocalizations.of(context).onThePlatorm,
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style: StreamChatTheme.of(context)
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.textTheme
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.footnote
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.copyWith(
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color: StreamChatTheme.of(context)
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.colorTheme
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.textHighEmphasis
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.withOpacity(.5))),
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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:
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_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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limit: 25,
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filter: Filter.and([
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if (_userNameQuery.isNotEmpty)
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Filter.autoComplete('name', _userNameQuery),
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Filter.notEqual('id',
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StreamChat.of(context).currentUser!.id),
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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:
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AlwaysScrollableScrollPhysics(),
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child: ConstrainedBox(
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constraints: BoxConstraints(
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minHeight:
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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:
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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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AppLocalizations.of(context)
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.noUserMatchesTheseKeywords,
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style: StreamChatTheme.of(
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context)
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.textTheme
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.footnote
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.copyWith(
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color: StreamChatTheme
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.of(context)
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.colorTheme
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.textHighEmphasis
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.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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},
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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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AppLocalizations.of(context).noChatsHereYet,
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style: TextStyle(
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fontSize: 12,
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color: StreamChatTheme.of(context)
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.colorTheme
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.textHighEmphasis
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.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.CHANNEL_LIST_PAGE),
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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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);
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}
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}
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