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Live query connection stream #313

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Live query connection stream #313

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6d2ae3b
added live-query-client-event-stream
fischerscode Mar 1, 2020
b5b0877
Update parse_live_query.dart
fischerscode Mar 2, 2020
ca51340
Cleanup
fischerscode Mar 2, 2020
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21 changes: 20 additions & 1 deletion lib/src/network/parse_live_query.dart
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Original file line number Diff line number Diff line change
@@ -1,10 +1,11 @@
import 'dart:async';
import 'dart:convert';
import 'dart:io';

import 'package:connectivity/connectivity.dart';
import 'package:flutter/widgets.dart';
import 'package:web_socket_channel/io.dart';
import 'package:web_socket_channel/web_socket_channel.dart';
import 'package:connectivity/connectivity.dart';

import '../../parse_server_sdk.dart';

Expand All @@ -31,10 +32,16 @@ class Subscription {
}
}

enum LiveQueryClientEvent { CONNECTED, DISCONNECTED }

class Client with WidgetsBindingObserver {
factory Client() => _getInstance();
Client._internal(
{bool debug, ParseHTTPClient client, bool autoSendSessionId}) {
_clientEventStreamController = StreamController<LiveQueryClientEvent>();
_clientEventStream =
_clientEventStreamController.stream.asBroadcastStream();

_client = client ??
ParseHTTPClient(
sendSessionId:
Expand Down Expand Up @@ -68,6 +75,10 @@ class Client with WidgetsBindingObserver {
return _instance;
}

Stream<LiveQueryClientEvent> get getClientEventStream {
return _clientEventStream;
}

WebSocket _webSocket;
ParseHTTPClient _client;
bool _debug;
Expand All @@ -76,6 +87,8 @@ class Client with WidgetsBindingObserver {
String _liveQueryURL;
bool _userDisconnected = false;
bool _connecting = false;
StreamController<LiveQueryClientEvent> _clientEventStreamController;
Stream<LiveQueryClientEvent> _clientEventStream;

final Map<int, Subscription> _requestSubScription = <int, Subscription>{};

Expand Down Expand Up @@ -185,13 +198,17 @@ class Client with WidgetsBindingObserver {
_channel.stream.listen((dynamic message) {
_handleMessage(message);
}, onDone: () {
_clientEventStreamController.sink
.add(LiveQueryClientEvent.DISCONNECTED);
if (!_userDisconnected) {
reconnect();
}
if (_debug) {
print('$_printConstLiveQuery: Done');
}
}, onError: (Object error) {
_clientEventStreamController.sink
.add(LiveQueryClientEvent.DISCONNECTED);
if (!_userDisconnected) {
reconnect();
}
Expand All @@ -203,6 +220,7 @@ class Client with WidgetsBindingObserver {
ParseApiRQ.liveQuery, _debug, 'IOWebSocketChannel'));
});
} on Exception catch (e) {
_clientEventStreamController.sink.add(LiveQueryClientEvent.DISCONNECTED);
if (_debug) {
print('$_printConstLiveQuery: Error: ${e.toString()}');
}
Expand Down Expand Up @@ -286,6 +304,7 @@ class Client with WidgetsBindingObserver {
_requestSubScription.values.toList().forEach((Subscription subcription) {
_subscribeLiveQuery(subcription);
});
_clientEventStreamController.sink.add(LiveQueryClientEvent.CONNECTED);
return;
}
if (actionData.containsKey('requestId')) {
Expand Down