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return a stream from querychannels and add channelsBloc to handle channelListview

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This commit is contained in:
Salvatore Giordano
2020-04-06 16:11:53 +02:00
parent fe7219a3c1
commit e35d0bc9f5
5 changed files with 115 additions and 74 deletions
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example/lib/main.dart
+22 -11
View File
@@ -63,17 +63,28 @@ class ChannelListPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: ChannelListView(
filter: {
'members': {
'\$in': [StreamChat.of(context).user.id],
}
},
sort: [SortOption('last_message_at')],
pagination: PaginationParams(
limit: 20,
),
channelWidget: ChannelPage(),
body: PageView(
children: <Widget>[
ChannelListView(
filter: {
'members': {
'\$in': [StreamChat.of(context).user.id],
}
},
sort: [SortOption('last_message_at')],
pagination: PaginationParams(
limit: 20,
),
channelWidget: ChannelPage(),
),
ChannelListView(
sort: [SortOption('last_message_at')],
pagination: PaginationParams(
limit: 20,
),
channelWidget: ChannelPage(),
),
],
),
);
}
lib/src/channel_list_view.dart
+19 -12
View File
@@ -1,5 +1,6 @@
import 'package:flutter/material.dart';
import 'package:stream_chat/stream_chat.dart';
import 'package:stream_chat_flutter/src/channels_bloc.dart';
import '../stream_chat_flutter.dart';
import 'channel_preview.dart';
@@ -99,15 +100,16 @@ class ChannelListView extends StatefulWidget {
}
class _ChannelListViewState extends State<ChannelListView>
with WidgetsBindingObserver {
with WidgetsBindingObserver, AutomaticKeepAliveClientMixin {
final ScrollController _scrollController = ScrollController();
ChannelsBloc channelsBloc;
@override
Widget build(BuildContext context) {
final streamChat = StreamChat.of(context);
super.build(context);
return RefreshIndicator(
onRefresh: () async {
return streamChat.queryChannels(
return channelsBloc.queryChannels(
filter: widget.filter,
sortOptions: widget.sort,
paginationParams: widget.pagination,
@@ -115,7 +117,7 @@ class _ChannelListViewState extends State<ChannelListView>
);
},
child: StreamBuilder<List<Channel>>(
stream: streamChat.channelsStream,
stream: channelsBloc.channelsStream,
builder: (context, snapshot) {
if (snapshot.hasError) {
if (snapshot.error is Error) {
@@ -163,7 +165,7 @@ class _ChannelListViewState extends State<ChannelListView>
),
FlatButton(
onPressed: () {
streamChat.queryChannels(
channelsBloc.queryChannels(
filter: widget.filter,
sortOptions: widget.sort,
paginationParams: widget.pagination,
@@ -215,7 +217,7 @@ class _ChannelListViewState extends State<ChannelListView>
if (i < channels.length) {
final channel = channels[i];
final channelClient = streamChat.channels.firstWhere(
final channelClient = channelsBloc.channels.firstWhere(
(c) => c.cid == channel.cid,
orElse: () => null,
);
@@ -285,7 +287,7 @@ class _ChannelListViewState extends State<ChannelListView>
Widget _buildQueryProgressIndicator(context, StreamChatState streamChat) {
return StreamBuilder<bool>(
stream: streamChat.queryChannelsLoading,
stream: channelsBloc.queryChannelsLoading,
initialData: false,
builder: (context, snapshot) {
if (snapshot.hasError) {
@@ -320,11 +322,11 @@ class _ChannelListViewState extends State<ChannelListView>
void _listenChannelPagination(StreamChatState streamChat) {
if (_scrollController.position.maxScrollExtent ==
_scrollController.offset) {
streamChat.queryChannels(
channelsBloc.queryChannels(
filter: widget.filter,
sortOptions: widget.sort,
paginationParams: widget.pagination.copyWith(
offset: streamChat.channels.length,
offset: channelsBloc.channels.length,
),
options: widget.options,
);
@@ -334,11 +336,12 @@ class _ChannelListViewState extends State<ChannelListView>
@override
void initState() {
super.initState();
final streamChat = StreamChat.of(context);
channelsBloc = ChannelsBloc(streamChat.client);
WidgetsBinding.instance.addObserver(this);
final streamChat = StreamChat.of(context);
streamChat.queryChannels(
channelsBloc.queryChannels(
filter: widget.filter,
sortOptions: widget.sort,
paginationParams: widget.pagination,
@@ -353,7 +356,7 @@ class _ChannelListViewState extends State<ChannelListView>
@override
void didChangeAppLifecycleState(AppLifecycleState state) {
if (state == AppLifecycleState.resumed) {
StreamChat.of(context).queryChannels(
channelsBloc.queryChannels(
filter: widget.filter,
sortOptions: widget.sort,
paginationParams: widget.pagination,
@@ -366,6 +369,10 @@ class _ChannelListViewState extends State<ChannelListView>
@override
void dispose() {
WidgetsBinding.instance.removeObserver(this);
channelsBloc.dispose();
super.dispose();
}
@override
bool get wantKeepAlive => true;
}
lib/src/channels_bloc.dart
+72
View File
@@ -0,0 +1,72 @@
import 'package:rxdart/rxdart.dart';
import 'package:stream_chat/stream_chat.dart';
class ChannelsBloc {
final Client client;
ChannelsBloc(this.client);
/// The current channel list
List<Channel> get channels => _channelsController.value;
/// The current channel list as a stream
Stream<List<Channel>> get channelsStream => _channelsController.stream;
final BehaviorSubject<bool> _queryChannelsLoadingController =
BehaviorSubject.seeded(false);
final BehaviorSubject<List<Channel>> _channelsController =
BehaviorSubject.seeded([]);
/// The stream notifying the state of queryChannel call
Stream<bool> get queryChannelsLoading =>
_queryChannelsLoadingController.stream;
/// Calls [client.queryChannels] updating [queryChannelsLoading] stream
Future<void> queryChannels({
Map<String, dynamic> filter,
List<SortOption> sortOptions,
PaginationParams paginationParams,
Map<String, dynamic> options,
bool onlyOffline = false,
}) async {
if (_queryChannelsLoadingController.value == true) {
return;
}
_queryChannelsLoadingController.sink.add(true);
try {
final clear = paginationParams == null ||
paginationParams.offset == null ||
paginationParams.offset == 0;
final oldChannels = List<Channel>.from(channels);
client
.queryChannels(
filter: filter,
sort: sortOptions,
options: options,
paginationParams: paginationParams,
onlyOffline: onlyOffline,
)
.listen((channels) {
if (clear) {
_channelsController.add(channels);
} else {
final l = oldChannels + channels;
_channelsController.add(l);
}
}, onDone: () {
_queryChannelsLoadingController.sink.add(false);
}, onError: (err, stackTrace) {
_queryChannelsLoadingController.addError(err, stackTrace);
});
} catch (err, stackTrace) {
_queryChannelsLoadingController.addError(err, stackTrace);
}
}
void dispose() {
_channelsController.close();
_queryChannelsLoadingController.close();
}
}
lib/src/stream_chat.dart
+1 -50
View File
@@ -2,7 +2,6 @@ import 'dart:async';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:rxdart/rxdart.dart';
import 'package:stream_chat/stream_chat.dart';
import 'package:stream_chat_flutter/src/stream_chat_theme.dart';
@@ -59,15 +58,12 @@ class StreamChat extends StatefulWidget {
}
}
class StreamChatState extends State<StreamChat>
with WidgetsBindingObserver, AutomaticKeepAliveClientMixin {
final List<StreamSubscription> _subscriptions = [];
class StreamChatState extends State<StreamChat> with WidgetsBindingObserver {
Client get client => widget.client;
final GlobalKey<NavigatorState> _navigatorKey = GlobalKey<NavigatorState>();
@override
Widget build(BuildContext context) {
super.build(context);
final theme = _getTheme(context, widget.streamChatThemeData);
return StreamChatTheme(
data: theme,
@@ -179,46 +175,6 @@ class StreamChatState extends State<StreamChat>
/// The current user as a stream
Stream<User> get userStream => widget.client.state.userStream;
/// The current channel list
List<Channel> get channels => client.state.channels;
/// The current channel list as a stream
Stream<List<Channel>> get channelsStream => client.state.channelsStream;
final BehaviorSubject<bool> _queryChannelsLoadingController =
BehaviorSubject.seeded(false);
/// The stream notifying the state of queryChannel call
Stream<bool> get queryChannelsLoading =>
_queryChannelsLoadingController.stream;
/// Calls [client.queryChannels] updating [queryChannelsLoading] stream
Future<void> queryChannels({
Map<String, dynamic> filter,
List<SortOption> sortOptions,
PaginationParams paginationParams,
Map<String, dynamic> options,
bool onlyOffline = false,
}) async {
if (_queryChannelsLoadingController.value == true) {
return;
}
_queryChannelsLoadingController.sink.add(true);
try {
await widget.client.queryChannels(
filter: filter,
sort: sortOptions,
options: options,
paginationParams: paginationParams,
onlyOffline: onlyOffline,
);
_queryChannelsLoadingController.sink.add(false);
} catch (err, stackTrace) {
_queryChannelsLoadingController.addError(err, stackTrace);
}
}
@override
void initState() {
super.initState();
@@ -239,12 +195,7 @@ class StreamChatState extends State<StreamChat>
@override
void dispose() {
_subscriptions.forEach((s) => s.cancel());
_queryChannelsLoadingController.close();
WidgetsBinding.instance.removeObserver(this);
super.dispose();
}
@override
bool get wantKeepAlive => true;
}
pubspec.yaml
+1 -1
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@@ -17,7 +17,7 @@ dependencies:
url_launcher: ^5.4.2
video_player: ^0.10.8+1
chewie: ^0.9.10
file_picker: ^1.5.1
file_picker: ^1.6.0
image_picker: ^0.6.4
flutter_keyboard_visibility: ^0.7.0
stream_chat: