MqttDispatcher/dist/mqttclient.js
2017-08-09 00:03:57 +02:00

88 lines
3.3 KiB
JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const Mqtt = require("mqtt");
const log = require("./log");
const callchain = require("./callchain");
const MQTT_BROKER_DEFAULT_URL = "mqtt://localhost";
function passThrough(message) {
return message;
}
exports.passThrough = passThrough;
class MqttClient {
constructor(mqttBrokerUrl) {
this._mqttBrokerUrl = (mqttBrokerUrl) ? mqttBrokerUrl : MQTT_BROKER_DEFAULT_URL;
this._topicHandlers = [];
}
registerCallbackFunc(topic, label, callbackFunc) {
let newChainItem = new callchain.ChainItem(label);
newChainItem.registerFunc(callbackFunc);
this.registerCallbackClass(topic, label, newChainItem);
}
registerCallbackClass(topic, label, newChainItem) {
let done = false;
for (let topicHandler of this._topicHandlers) {
if (topicHandler.topic === topic) {
topicHandler.last.registerNext(newChainItem);
topicHandler.last = newChainItem;
done = true;
log.info(`additional callback ${newChainItem.toString()} added for topic ${topic}`);
}
}
if (!done) {
this._topicHandlers.push({ topic: topic, root: newChainItem, last: newChainItem });
log.info(`first callback ${newChainItem.toString()} added for topic ${topic}`);
}
}
test() {
this._mqttClient.emit("message", 'IoT/test', 'payload');
}
exec() {
for (let topicHandler of this._topicHandlers) {
topicHandler.root.begin();
}
this._mqttClient = Mqtt.connect(this._mqttBrokerUrl);
this._mqttClient.on('error', log.error);
this._mqttClient.on('connect', () => {
log.info("connected to mqtt broker");
for (let topicHandler of this._topicHandlers) {
this._mqttClient.subscribe(topicHandler.topic);
}
});
this._mqttClient.on('message', (topic, payload) => {
log.info(`message received, topic ${topic}, payload ${payload}`);
for (let topicHandler of this._topicHandlers) {
if (this.topicMatch(topicHandler.topic, topic)) {
log.info(`received topic ${topic} matches registered topic ${topicHandler.topic}`);
topicHandler.root.send(payload);
}
}
});
}
topicMatch(registeredTopic, receivedTopic) {
let registeredTopicFields = registeredTopic.split('/');
let receivedTopicFields = receivedTopic.split('/');
for (let field in registeredTopicFields) {
let regField = registeredTopicFields[field];
let recvField = receivedTopicFields[field];
log.info(`recv: ${recvField}, reg: ${regField}`);
if (regField === "#") {
log.info('true');
return true;
}
if (regField != recvField && regField != "+") {
log.info('false');
return false;
}
}
if (registeredTopicFields.length == receivedTopicFields.length) {
log.info('true');
return true;
}
else {
log.info('false');
return false;
}
}
}
exports.MqttClient = MqttClient;
//# sourceMappingURL=mqttclient.js.map