Alex2Node/examples/legacy/ExampleToggleController.js

// Import the library ("alex2node" is the installed package; inside this checkout it resolves to the built dist/ via package.json "exports")
const {
    Alex2MQTT,
    AlexaInterfaceType,
    PowerController,
    EndpointHealth,
  } = require("alex2node");

  require("dotenv").config();

  const username = process.env.MQTT_USERNAME;
  const password = process.env.MQTT_PASSWORD;
  const rootTopic = process.env.MQTT_ROOT_TOPIC;

  const alex2NodeClient = new Alex2MQTT(username, password, rootTopic, false); // set the 4th argument to true to print every MQTT payload
  alex2NodeClient.connect();
  alex2NodeClient.on("error", (e) => console.error("broker:", e.message)); // Log broker errors (on 1.5.0 this listener is also what keeps an outage from killing the process)

  const deviceName = "Custom Device";
  const customToggle = alex2NodeClient.registerDevice(deviceName, "custom-device-1");
  
  // Define 8 toggle instances and friendly names
  const switchCount = 8;
  const instanceNames = Array.from({ length: switchCount }, (_, i) => `nodejs.toggle.switch${i + 1}`);
  const friendlyNames = Array.from({ length: switchCount }, (_, i) => `Switch ${i + 1}`);
  
  // Add toggle capabilities and store toggle objects
  const toggles = [];
  for (let i = 0; i < switchCount; i++) {
    const toggle = customToggle.addCapability(AlexaInterfaceType.TOGGLE_CONTROLLER);
    toggle.setInstance(instanceNames[i]);
    toggle.addFriendlyName(friendlyNames[i], "en-US");
    toggles.push(toggle);
  }
  
  // Output states for all switches
  const toggleStates = Array(switchCount).fill(PowerController.OFF);
  
  console.log(customToggle.getName());
  
  customToggle.on("ReportState", (payload) => {
    console.log("ReportState received!", payload);
    const { correlationToken } = payload.header;
    const status = customToggle.getStatusMessage(correlationToken);
  
    status.addHealthProp(EndpointHealth.OK);
  
    // Report all toggle states
    for (let i = 0; i < switchCount; i++) {
      status.addToggleControllerProp(toggleStates[i], instanceNames[i]);
    }
  
    status.send();
  });
  
  customToggle.on("Event", (directive, interfaceType) => {
    console.log("Event received", { directive, interfaceType });
  
    if (interfaceType === AlexaInterfaceType.TOGGLE_CONTROLLER) {
      const { name, correlationToken, instance } = directive.header;
  
      const index = instanceNames.indexOf(instance);
      if (index !== -1) {
        if (name === "TurnOn") {
          toggleStates[index] = PowerController.ON;
          console.log(`Turning ON ${friendlyNames[index]}`);
        } else if (name === "TurnOff") {
          toggleStates[index] = PowerController.OFF;
          console.log(`Turning OFF ${friendlyNames[index]}`);
        }
  
        const status = customToggle.getStatusMessage(correlationToken, true);
        status
          .addHealthProp(EndpointHealth.OK)
          .addToggleControllerProp(toggleStates[index], instance)
          .send();
      }
    }
  });