96 lines
2.3 KiB
Dart
96 lines
2.3 KiB
Dart
import 'dart:async';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:rxdart/rxdart.dart';
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import 'package:stream_chat/stream_chat.dart';
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class StreamChat extends InheritedWidget {
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final Client client;
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final List<StreamSubscription> _subscriptions = [];
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StreamChat({
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Key key,
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@required this.client,
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@required Widget child,
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}) : super(
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key: key,
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child: child,
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) {
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_subscriptions.add(client.on(EventType.messageNew).listen((Event e) {
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final index = channels.indexWhere((c) => c.cid == e.cid);
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if (index > 0) {
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final channel = channels.removeAt(index);
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channels.insert(0, channel);
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}
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}));
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}
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User get user => client.state.user;
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Stream<User> get userStream => client.state.userStream;
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final List<Channel> channels = [];
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final BehaviorSubject<bool> _queryChannelsLoadingController =
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BehaviorSubject.seeded(false);
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Stream<bool> get queryChannelsLoading =>
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_queryChannelsLoadingController.stream;
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Future<void> queryChannels({
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Map<String, dynamic> filter,
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List<SortOption> sortOptions,
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PaginationParams paginationParams,
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Map<String, dynamic> options,
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}) async {
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if (_queryChannelsLoadingController.value) {
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return;
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}
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_queryChannelsLoadingController.sink.add(true);
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try {
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client.queryChannels(
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filter: filter,
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sort: sortOptions,
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options: options,
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paginationParams: paginationParams,
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);
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} finally {
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_queryChannelsLoadingController.sink.add(false);
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}
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}
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void clearChannels() {
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channels.clear();
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}
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void dispose() {
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client.dispose();
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_subscriptions.forEach((s) => s.cancel());
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_queryChannelsLoadingController.close();
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}
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@override
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bool updateShouldNotify(InheritedWidget oldWidget) {
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return true;
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}
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static StreamChat of(BuildContext context, [bool listen = false]) {
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StreamChat streamChat;
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if (listen) {
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streamChat = context.dependOnInheritedWidgetOfExactType<StreamChat>();
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} else {
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streamChat = context.findAncestorWidgetOfExactType<StreamChat>();
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}
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if (streamChat == null) {
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throw Exception(
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'You must have a StreamChat widget at the top of your widget tree');
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}
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return streamChat;
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}
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}
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