Alex2Node/examples/ExamplePowerControllerWithErrors.js
2025-05-12 16:46:33 +00:00

92 lines
2.6 KiB
JavaScript

const {
Alex2MQTT,
AlexaInterfaceType,
PowerController,
AlexaErrorType,
} = require("../dist/index.js");
require("dotenv").config();
let outputState = PowerController.OFF;
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);
alex2NodeClient.connect();
const errorLight = alex2NodeClient.registerDevice("bad light", "endpoint4");
errorLight.addCapability(AlexaInterfaceType.POWER_CONTROLLER);
console.log(errorLight.getName());
// Error cycling setup
const errorCycle = [
AlexaErrorType.ENDPOINT_LOW_POWER,
AlexaErrorType.VALUE_OUT_OF_RANGE,
AlexaErrorType.HARDWARE_MALFUNCTION,
AlexaErrorType.BRIDGE_UNREACHABLE,
AlexaErrorType.FIRMWARE_OUT_OF_DATE,
AlexaErrorType.NOT_CALIBRATED,
AlexaErrorType.RATE_LIMIT_EXCEEDED,
];
let currentErrorIndex = 0;
/**
* Always return HARDWARE_MALFUNCTION error on state queries.
*/
errorLight.on("ReportState", (payload) => {
console.log("ReportState received!", payload);
const { correlationToken } = payload.header;
const errorResponse = errorLight.getErrorMessage(correlationToken);
errorResponse.setErrorMessage(
AlexaErrorType.HARDWARE_MALFUNCTION,
"The device is currently busy and cannot report its state."
);
console.log("Sending error: HARDWARE_MALFUNCTION");
errorResponse.send();
});
/**
* Handle control directives with 90% error chance, cycling through fixed errors.
*/
errorLight.on("Event", (directive, interfaceType) => {
if (interfaceType === AlexaInterfaceType.POWER_CONTROLLER) {
const name = directive.header.name;
const token = directive.header.correlationToken;
const shouldError = Math.random() < 0.9;
if (shouldError) {
const errorType = errorCycle[currentErrorIndex];
currentErrorIndex = (currentErrorIndex + 1) % errorCycle.length;
const errorResponse = errorLight.getErrorMessage(token);
errorResponse.setErrorMessage(
errorType,
`Failed to process ${name} due to ${errorType.replace(/_/g, " ").toLowerCase()}.`
);
console.log(`Sending error: ${errorType}`);
errorResponse.send();
return;
}
// Success path
if (name === "TurnOn") {
outputState = PowerController.ON;
console.log("Turning ON the Light");
} else if (name === "TurnOff") {
outputState = PowerController.OFF;
console.log("Turning OFF the Light");
}
const status = errorLight.getStatusMessage(token, true);
status
.addHealthProp("OK")
.addPowerControllerProp(outputState)
.send();
}
});