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Add filter for each topic #1

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132 changes: 80 additions & 52 deletions main.ts
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Original file line number Diff line number Diff line change
@@ -1,52 +1,80 @@
import mqtt from "mqtt";
import promclient from "prom-client";
// @deno-types="@types/express"
import express from "express";
import { Buffer } from "node:buffer";

const client = mqtt.connect(`mqtt:${Deno.env.get("MQTT_HOST")}`, {
username: Deno.env.get("MQTT_USERNAME"),
password: Deno.env.get("MQTT_PASSWORD"),
port: Number(Deno.env.get("MQTT_PASSWORD")),
connectTimeout: 10 * 1000,
});
console.log("Connecting...");
client.on("connect", () => {
client.subscribe([
"icnss/temperature",
"icnss/humidity",
"icnss/co",
]);
console.log("Connected!");
});
client.on("reconnect", () => {
console.log("Reconnecting...");
});
client.on("error", () => {
console.log("Connection failed, exiting...");
client.end();
Deno.exit();
});

const tempGauge = new promclient.Gauge({
name: "temperature",
help: "Temperature Gauge",
});

const tempHandler = (message: Buffer) => {
const temp = Number(message.toString());
tempGauge.set(temp);
};

client.on("message", (topic, message, _) => {
console.log(`Message received: ${topic}: ${message.toString()}`);
tempHandler(message);
// ...
});

const app = express();
app.get("/metrics", async (_, res) => {
res.set("Content-Type", promclient.register.contentType)
.send(await promclient.register.metrics());
});
app.listen(3000);
import mqtt from "mqtt";
import promclient from "prom-client";
// @deno-types="@types/express"
import express from "express";
import { Buffer } from "node:buffer";

const client = mqtt.connect(`mqtt:${Deno.env.get("MQTT_HOST")}`, {
username: Deno.env.get("MQTT_USERNAME"),
password: Deno.env.get("MQTT_PASSWORD"),
port: Number(Deno.env.get("MQTT_PASSWORD")),
connectTimeout: 10 * 1000,
});
console.log("Connecting...");
client.on("connect", () => {
client.subscribe([
"icnss/temperature",
"icnss/humidity",
"icnss/co",
]);
console.log("Connected!");
});
client.on("reconnect", () => {
console.log("Reconnecting...");
});
client.on("error", () => {
console.log("Connection failed, exiting...");
client.end();
Deno.exit();
});

const tempGauge = new promclient.Gauge({
name: "temperature",
help: "Temperature Gauge",
});
const humiGauge = new promclient.Gauge({
name: "humidity",
help: "Humidity Gauge",
});
const coGauge = new promclient.Gauge({
name: "co2",
help: "CO2 Gauge",
});

const tempHandler = (message: Buffer) => {
const temp = Number(message.toString());
tempGauge.set(temp);
};
const humiHandler = (message: Buffer) => {
const humi = Number(message.toString());
humiGauge.set(humi);
};
const coHandler = (message: Buffer) => {
const co = Number(message.toString());
coGauge.set(co);
};

client.on("message", (topic, message, _) => {
console.log(`Message received: ${topic}: ${message.toString()}`);
switch (topic) {
case "icnss/temperature":
tempHandler(message);
break;
case "icnss/humidity":
humiHandler(message)
break;
case "icnss/co":
coHandler(message)
break;

default:
break;
}
});

const app = express();
app.get("/metrics", async (_, res) => {
res.set("Content-Type", promclient.register.contentType)
.send(await promclient.register.metrics());
});
app.listen(3000);