Add topic publishing sidebar

backend/src/DataSource/DataSource.ts

@@ -7,6 +7,7 @@ interface DataSource<DataSourceOptions> {
   connect(options: DataSourceOptions): DataSourceStateMachine
   disconnect(): void
   onMessage(messageCallback: MessageCallback): void
+  publish(topic: string, payload: any): void
   topicSeparator: string
   stateMachine: DataSourceStateMachine
 }

backend/src/DataSource/MqttSource.ts

@@ -69,6 +69,10 @@ export class MqttSource implements DataSource<MqttOptions> {
     return this.stateMachine
   }
 
+  public publish(topic: string, payload: any) {
+    this.client && this.client.publish(topic, payload)
+  }
+
   public disconnect() {
     this.client && this.client.end()
   }