Update to convert to TypeScript and use a few changes to get data from GraphQL

package.json

@@ -2,9 +2,11 @@
   "name": "temperato",
   "version": "1.0.0",
   "description": "",
-  "main": "index.js",
-  "type": "module",
+  "main": "src/index.ts",
+  "module": "src/index.ts",
   "scripts": {
+    "start": "ts-node src/index.ts",
+    "ts-node": "ts-node",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "repository": {
@@ -14,9 +16,14 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "@koa/router": "^10.1.1",
     "dotenv": "^16.0.1",
-    "koa": "^2.13.4",
-    "node-fetch": "^3.2.4"
+    "graphql-request": "^4.2.0",
+    "node-fetch": "^2.6.1"
+  },
+  "devDependencies": {
+    "@types/node": "^17.0.35",
+    "@types/node-fetch": "^2.6.1",
+    "ts-node": "^10.8.0",
+    "typescript": "^4.7.2"
   }
 }

src/index.ts

@@ -18,8 +18,8 @@
 
 import 'dotenv/config';
 import fetch from 'node-fetch';
-import Koa from 'koa';
-import Router from '@koa/router';
+import { request } from 'graphql-request';
+import getSensorDataQuery from './queries/getSensorData';
 
 const PORT = process.env.PORT || 3000;
 const SET_POINT = parseFloat(process.env.SET_POINT);
@@ -27,35 +27,14 @@ const USERNAME = process.env.USERNAME;
 const PASSWORD = process.env.PASSWORD;
 const NOTIF_URL = process.env.NOTIF_URL;
 const MESSAGE = process.env.MESSAGE;
-const SENSOR_URL = process.env.SENSOR_URL;
+const GRAPHQL_URL = process.env.GRAPHQL_URL;
 const SLEEP_TIMER = 1000;
 
-const app = new Koa();
-const router = new Router();
-
-router.get('/', async ctx => {
-   try {
-       ctx.body = `{"temperature": ${currentSensorReading}}`;
-   } catch (e) {
-       ctx.body = 'There was an error retrieving the sensor data.';
-       ctx.status = 500;
-   }
-});
-
-app
-    .use(router.routes())
-    .use(router.allowedMethods());
-
-app.listen(PORT);
-
-let currentSensorReading=0.0
-
 async function temperatoTick() {
     try {
-        const sensor = await fetch(SENSOR_URL);
-        const reading = await sensor.json();
-        currentSensorReading = reading.temperature;
-        if (reading.temperature >= SET_POINT) {
+        const response = await request(GRAPHQL_URL, getSensorDataQuery);
+        
+	if (response.getSensorData.temperato >= SET_POINT) {
             const basicAuth = Buffer.from(`${USERNAME}:${PASSWORD}`).toString('base64');
             await fetch(NOTIF_URL, {
                 method: 'post',

src/queries/getSensorData.ts

@@ -0,0 +1,11 @@
+import { gql } from 'graphql-request';
+
+const getSensorDataQuery = gql`
+    query Temperato {
+        getSensorData {
+        temperato
+        }
+    }
+`;
+
+export default getSensorDataQuery;

systemd/temperato.service

@@ -2,8 +2,8 @@
 Description=Temperato Service
 
 [Service]
-ExecStart=node index.js
-ExecReload=node index.js
+ExecStart=npm start
+ExecReload=npm start
 KillMode=process
 Restart=on-failure
 Type=simple

tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "outDir": "./build",
+    "typeRoots": ["node_modules/@types", "node_modules/node-fetch/@types"],
+    "module": "commonjs",
+    "esModuleInterop": true,
+    "moduleResolution": "node",
+    "declaration": true,
+    "noImplicitAny": true,
+    "skipLibCheck": true
+  },
+  "include": ["./src/**/*.ts"],
+  "exclude": ["node_modules"]
+}