Refactor communication

Add QoS andd retain flag
Refactor reducer

backend/src/DataSource/DataSource.ts

@@ -1,4 +1,5 @@
 import { DataSourceStateMachine } from './'
+import { MqttMessage } from '../../../events'
 
 type MessageCallback = (topic: string, payload: Buffer) => void
 
@@ -7,7 +8,7 @@ interface DataSource<DataSourceOptions> {
   connect(options: DataSourceOptions): DataSourceStateMachine
   disconnect(): void
   onMessage(messageCallback: MessageCallback): void
-  publish(topic: string, payload: any): void
+  publish(msg: MqttMessage): void
   topicSeparator: string
   stateMachine: DataSourceStateMachine
 }