73 lines
2.2 KiB
JavaScript
73 lines
2.2 KiB
JavaScript
"use strict";
|
|
|
|
import mqtt from 'async-mqtt';
|
|
|
|
class TTNAppServer {
|
|
get connection_string() {
|
|
return `${this.settings.ttn.tls ? "mqtts" : "mqtt"}://${this.settings.ttn.host}:${this.settings.ttn.port}/`
|
|
}
|
|
|
|
// Destructure the awilix container
|
|
constructor({ settings, ansi, MessageHandler, log }) {
|
|
this.settings = settings;
|
|
/** @type {Ansi} */
|
|
this.a = ansi;
|
|
/** @type {Log} */
|
|
this.log = log;
|
|
/** @type {MessageHandler} */
|
|
this.message_handler = MessageHandler;
|
|
}
|
|
|
|
async run() {
|
|
// 1: Sanity checks
|
|
if(this.settings.ttn.app_id == "CHANGE_THIS" || this.settings.ttn.access_key == "CHANGE_THIS") {
|
|
this.log.error(`Error: No TTN app id specified. Try filling in the required values in settings.toml. If they don't exist yet, try using server/settings.default.toml as a reference.`);
|
|
return false;
|
|
}
|
|
|
|
if(this.settings.ttn.devices.includes("CHANGE_THIS")) {
|
|
this.log.error(`Error: No device names specified. Try filling in the required values in settings.toml. If they don't exist yet, try using server/settings.default.toml as a reference.`);
|
|
return false;
|
|
}
|
|
|
|
|
|
// 2: Connect
|
|
this.ttn_client = await this.connect();
|
|
this.ttn_client.on("message", this.handle_message.bind(this));
|
|
this.log.log(`Connected to ${this.connection_string}`);
|
|
|
|
|
|
// 3: Subscribe
|
|
let result = await this.ttn_client.subscribe(this.settings.ttn.devices.map(
|
|
(device_name) => `${this.settings.ttn.app_id}/devices/${device_name}/up`
|
|
));
|
|
|
|
this.log.log(`Subscribed to ${result.map((el) => el.topic).join(", ")}`);
|
|
}
|
|
|
|
connect() {
|
|
return new Promise((resolve, _reject) => {
|
|
let client = mqtt.connect(this.connection_string, {
|
|
username: this.settings.ttn.app_id,
|
|
password: this.settings.ttn.access_key
|
|
});
|
|
client.once("connect", () => resolve(client));
|
|
});
|
|
}
|
|
|
|
async handle_message(topic, message_buffer) {
|
|
let message = message_buffer.toString("utf8"),
|
|
message_object = null;
|
|
try {
|
|
message_object = JSON.parse(message);
|
|
} catch(error) {
|
|
this.log.log(error);
|
|
return false;
|
|
}
|
|
|
|
this.log.log(`[mqtt/handler] ${topic}: `, message_object);
|
|
// await this.message_handler.handle(payload);
|
|
}
|
|
}
|
|
|
|
export default TTNAppServer;
|