Resolves #58: Message queue

lib/home_assistant.class.dart

@@ -6,6 +6,7 @@ class HomeAssistant {
   String _hassioAuthType;
 
   IOWebSocketChannel _hassioChannel;
+  SendMessageQueue _messageQueue;
 
   int _currentMessageId = 0;
   int _statesMessageId = 0;
@@ -36,6 +37,7 @@ class HomeAssistant {
     _hassioAuthType = authType;
     _entities = EntityCollection();
     _uiBuilder = UIBuilder();
+    _messageQueue = SendMessageQueue(20);
   }
 
   Future fetch() {
@@ -65,7 +67,7 @@ class HomeAssistant {
 
   Future _reConnectSocket() {
     if ((_connectionCompleter != null) && (!_connectionCompleter.isCompleted)) {
-      TheLogger.log("Warning","Previous connection is not complited");
+      TheLogger.log("Debug","Previous connection is not complited");
     } else {
       if ((_hassioChannel == null) || (_hassioChannel.closeCode != null)) {
         TheLogger.log("Debug", "Socket connecting...");
@@ -131,8 +133,7 @@ class HomeAssistant {
     var data = json.decode(message);
     //TheLogger.log("Debug","[Received] => Message type: ${data['type']}");
     if (data["type"] == "auth_required") {
-      _finishConnecting(null);
+      _sendAuthMessageRaw('{"type": "auth","$_hassioAuthType": "$_hassioPassword"}');
-      _sendMessageRaw('{"type": "auth","$_hassioAuthType": "$_hassioPassword"}');
     } else if (data["type"] == "auth_ok") {
       _finishConnecting(null);
       _sendSubscribe();
@@ -164,14 +165,14 @@ class HomeAssistant {
   void _sendSubscribe() {
     _incrementMessageId();
     _subscriptionMessageId = _currentMessageId;
-    _sendMessageRaw('{"id": $_subscriptionMessageId, "type": "subscribe_events", "event_type": "state_changed"}');
+    _sendMessageRaw('{"id": $_subscriptionMessageId, "type": "subscribe_events", "event_type": "state_changed"}', false);
   }
 
   Future _getConfig() {
     _configCompleter = new Completer();
     _incrementMessageId();
     _configMessageId = _currentMessageId;
-    _sendMessageRaw('{"id": $_configMessageId, "type": "get_config"}');
+    _sendMessageRaw('{"id": $_configMessageId, "type": "get_config"}', false);
 
     return _configCompleter.future;
   }
@@ -180,7 +181,7 @@ class HomeAssistant {
     _statesCompleter = new Completer();
     _incrementMessageId();
     _statesMessageId = _currentMessageId;
-    _sendMessageRaw('{"id": $_statesMessageId, "type": "get_states"}');
+    _sendMessageRaw('{"id": $_statesMessageId, "type": "get_states"}', false);
 
     return _statesCompleter.future;
   }
@@ -189,7 +190,7 @@ class HomeAssistant {
     _servicesCompleter = new Completer();
     _incrementMessageId();
     _servicesMessageId = _currentMessageId;
-    _sendMessageRaw('{"id": $_servicesMessageId, "type": "get_services"}');
+    _sendMessageRaw('{"id": $_servicesMessageId, "type": "get_services"}', false);
 
     return _servicesCompleter.future;
   }
@@ -198,15 +199,23 @@ class HomeAssistant {
     _currentMessageId += 1;
   }
 
-  _sendMessageRaw(String message) {
+  void _sendAuthMessageRaw(String message) {
+    TheLogger.log("Debug", "[Sending] ==> auth request");
+    _hassioChannel.sink.add(message);
+  }
+
+  _sendMessageRaw(String message, bool queued) {
     var sendCompleter = Completer();
+    if (queued) _messageQueue.add(message);
     _reConnectSocket().then((r) {
-      if (message.indexOf('"type": "auth"') > 0) {
+      _messageQueue.getActualMessages().forEach((message){
-        TheLogger.log("Debug", "[Sending] ==> auth request");
+        TheLogger.log("Debug", "[Sending queued] ==> $message");
-      } else {
+        _hassioChannel.sink.add(message);
+      });
+      if (!queued) {
         TheLogger.log("Debug", "[Sending] ==> $message");
+        _hassioChannel.sink.add(message);
       }
-      _hassioChannel.sink.add(message);
       sendCompleter.complete();
     }).catchError((e){
       sendCompleter.completeError(e);
@@ -223,7 +232,7 @@ class HomeAssistant {
       });
     }
     message += '}}';
-    return _sendMessageRaw(message);
+    return _sendMessageRaw(message, true);
   }
 
   void _handleEntityStateChange(Map eventData) {
@@ -277,3 +286,43 @@ class HomeAssistant {
     _statesCompleter.complete();
   }
 }
+
+class SendMessageQueue {
+  int _messageTimeout;
+  List<HAMessage> _queue = [];
+
+  SendMessageQueue(this._messageTimeout);
+
+  void add(String message) {
+    _queue.add(HAMessage(_messageTimeout, message));
+  }
+  
+  List<String> getActualMessages() {
+    _queue.removeWhere((item) => item.isExpired());
+    List<String> result = [];
+    _queue.forEach((haMessage){
+      result.add(haMessage.message);
+    });
+    this.clear();
+    return result;
+  }
+  
+  void clear() {
+    _queue.clear();
+  }
+  
+}
+
+class HAMessage {
+  DateTime _timeStamp;
+  int _messageTimeout;
+  String message;
+  
+  HAMessage(this._messageTimeout, this.message) {
+    _timeStamp = DateTime.now();
+  }
+  
+  bool isExpired() {
+    return _timeStamp.difference(DateTime.now()).inSeconds > _messageTimeout;
+  }
+}