uid: rules_tools:mqtt_status
label: MQTT Online Status Publisher
description: Publishes a retained ONLINE message to the openHAB client's LWT topic to make it easier for other clients to know when OH is connected.
configDescriptions:
  - name: broker
    type: TEXT
    context: thing
    label: MQTT Broker Thing
    description: Select the MQTT Broker Thing with a LWT configured
    required: true
  - name: topic
    type: TEXT
    label: LWT Topic 
    description: Use the same LWT Topic configured on the MQTT Broker Thing
    required: true
triggers:
  - id: "1"
    label: Mosquitto Broker Thing changes to ONLINE
    configuration:
      thingUID: "{{broker}}"
      status: ONLINE
    type: core.ThingStatusChangeTrigger
conditions: []
actions:
  - inputs: {}
    id: "2"
    label: Publish ONLINE to the LWT topic
    configuration:
      type: application/javascript
      script: >-
        if(typeof(require) === "function") Object.assign(this, require('@runtime'));
        
        var logger =
        Java.type("org.slf4j.LoggerFactory").getLogger("org.openhab.model.script.Rules.rules_tools.MQTT_Online");

        logger.info("Publishing ONLINE to LWT topic {{topic}}");

        actions.get("mqtt", "{{broker}}").publishMQTT("{{topic}}", "ONLINE", true);
    type: script.ScriptAction