import { randomUUID } from "crypto"; import { errorResponse } from "../messages/build.js"; import { AlexaErrors } from "../messages/errors.js"; /** An ErrorResponse as 1.x builds it: device.getErrorMessage(token), setErrorMessage(), send(). */ export class AlexaErrorResponse { constructor(correlationToken, rootTopic, endpointId, mqttClient) { this.correlationToken = correlationToken; this.rootTopic = rootTopic; this.endpointId = endpointId; this.mqttClient = mqttClient; // Sent when setErrorMessage() was not called: 1.x published an empty payload, which is no ErrorResponse to Alexa this.error = AlexaErrors.of("INTERNAL_ERROR", "the device answered with an error and did not say which"); // One id for the message, however often toJSON() is called this.messageId = randomUUID(); } /** * The error to answer with. otherParams are the fields the type adds to the payload (validRange). The header * carries the namespace the type is documented under, Alexa.ThermostatController for THERMOSTAT_IS_OFF; * options.namespace names another. */ setErrorMessage(type, message, otherParams = {}, options = {}) { this.error = AlexaErrors.of(type, message, otherParams); this.namespace = options.namespace; } toJSON() { const { type, alexaMessage, extra } = this.error; return errorResponse({ endpointId: this.endpointId, messageId: this.messageId, correlationToken: this.correlationToken, type, message: alexaMessage, extra, namespace: this.namespace ?? this.error.namespace, }); } /** Resolves with the topic published to, or "" when the publish failed. Never rejects. */ send(sendAsync = false) { const topic = `${this.rootTopic}/${this.endpointId}/${sendAsync ? "deferredResponse" : "alexaResponce"}`; // "alexaResponce" is how Alex2MQTT and Alex2ESP spell the topic return new Promise((resolve) => { this.mqttClient.publish(topic, JSON.stringify(this.toJSON()), (err) => { if (!err) return resolve(topic); if (this.onPublishError) this.onPublishError(err); // -> the bridge's "error" event (when somebody listens) resolve(""); // 1.5.1 rejected here, and an un-caught send() then killed the host on any broker hiccup }); }); } }