100 lines
3.9 KiB
JavaScript
100 lines
3.9 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const Mqtt = require("mqtt");
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const log = require("./log");
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const callchain = require("./callchain");
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const fs = require("fs");
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const MQTT_BROKER_DEFAULT_URL = "mqtt://localhost";
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function passThrough(message) {
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return message;
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}
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exports.passThrough = passThrough;
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class MqttDispatcher {
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constructor(mqttBrokerUrl, mqttUser, mqttPass, mqttCAFile) {
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this._mqttOptions = {};
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this._mqttBrokerUrl = (mqttBrokerUrl) ? mqttBrokerUrl : MQTT_BROKER_DEFAULT_URL;
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if (mqttUser && mqttPass) {
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this._mqttOptions.username = mqttUser;
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this._mqttOptions.password = mqttPass;
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}
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if (mqttCAFile) {
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this._mqttOptions.ca = fs.readFileSync(mqttCAFile, 'ascii');
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this._mqttOptions.rejectUnauthorized = true;
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}
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this._topicHandlers = [];
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}
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register(topic, label, newChainItemOrCallbackFunc) {
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let newChainItem;
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if (newChainItemOrCallbackFunc instanceof callchain.AChainItem) {
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newChainItem = newChainItemOrCallbackFunc;
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}
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else {
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let myNewChainItem = new callchain.ChainItem(label);
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myNewChainItem.registerFunc(newChainItemOrCallbackFunc);
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newChainItem = myNewChainItem;
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}
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let done = false;
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for (let topicHandler of this._topicHandlers) {
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if (topicHandler.topic === topic) {
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topicHandler.last.registerNext(newChainItem);
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topicHandler.last = newChainItem;
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done = true;
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log.info(`additional callback ${newChainItem.toString()} added for topic ${topic}`);
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}
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}
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if (!done) {
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this._topicHandlers.push({ topic: topic, root: newChainItem, last: newChainItem });
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log.info(`first callback ${newChainItem.toString()} added for topic ${topic}`);
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}
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}
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exec() {
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for (let topicHandler of this._topicHandlers) {
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topicHandler.root.begin();
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}
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log.info(`connecting to ${this._mqttBrokerUrl}`);
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this._mqttClient = Mqtt.connect(this._mqttBrokerUrl, this._mqttOptions);
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this._mqttClient.on('error', log.error);
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this._mqttClient.on('connect', () => {
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log.info("connected to mqtt broker");
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for (let topicHandler of this._topicHandlers) {
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this._mqttClient.subscribe(topicHandler.topic);
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}
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});
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this._mqttClient.on('message', (topic, payload) => {
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log.info(`message received, topic ${topic}, payload ${payload}`);
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for (let topicHandler of this._topicHandlers) {
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if (this.topicMatch(topicHandler.topic, topic)) {
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log.info(`received topic ${topic} matches registered topic ${topicHandler.topic}`);
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topicHandler.root.send(payload);
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}
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}
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});
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}
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topicMatch(registeredTopic, receivedTopic) {
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let registeredTopicFields = registeredTopic.split('/');
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let receivedTopicFields = receivedTopic.split('/');
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for (let field in registeredTopicFields) {
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let regField = registeredTopicFields[field];
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let recvField = receivedTopicFields[field];
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log.info(`recv: ${recvField}, reg: ${regField}`);
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if (regField === "#") {
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log.info('true');
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return true;
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}
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if (regField != recvField && regField != "+") {
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log.info('false');
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return false;
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}
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}
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if (registeredTopicFields.length == receivedTopicFields.length) {
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log.info('true');
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return true;
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}
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else {
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log.info('false');
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return false;
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}
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}
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}
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exports.MqttDispatcher = MqttDispatcher;
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//# sourceMappingURL=mqttdispatcher.js.map
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