Hossein-w2-node.js

.gitignore

@@ -5,6 +5,7 @@ node_modules
 npm-debug.log
 package-lock.json
 yarn-error.log
+.env
 *.bkp
 
 week3/prep-exercise/server-demo/

assignments/hackyourtemperature/__tests__/app.test.js

@@ -0,0 +1,29 @@
+import { app } from '../app.js';
+import supertest from 'supertest';
+
+const request = supertest(app);
+
+describe('POST /weather', () => {
+    it('should return 400 if no cityName is provided', async () => {
+        const response = await request.post('/weather').send({});
+
+        expect(response.status).toBe(400);
+        expect(response.body).toEqual({
+            weatherText: 'City name is required!'
+        });
+    });
+
+    it('should return 404 if cityName is gibberish', async () => {
+        const response = await request.post('/weather').send({ cityName: 'aslkdjflaskjd' });
+
+        expect(response.status).toBe(404);
+        expect(response.body).toEqual({ weatherText: 'City is not found!' });
+    });
+
+    it('should return 200 with correct cityName', async () => {
+        const response = await request.post('/weather').send({ cityName: 'Amsterdam' });
+
+        expect(response.status).toBe(200);
+        expect(response.body.weatherText).toContain('Amsterdam');
+    });
+});

assignments/hackyourtemperature/app.js

@@ -0,0 +1,40 @@
+import express from 'express';
+import keys from './sources/keys.js';
+import fetch from 'node-fetch';
+
+const app = express();
+
+app.use(express.json());
+
+app.get('/', (req, res) => {
+    res.send('Hello from backend to frontend!');
+});
+
+app.post('/weather', async (req, res) => {
+    try {
+        const { cityName } = req.body;
+
+        if (!cityName) {
+            return res.status(400).json({ weatherText: 'City name is required!' });
+        }
+
+        const response = await fetch(
+            `https://api.openweathermap.org/data/2.5/weather?q=${cityName}&appid=${keys.API_KEY}`
+        );
+
+        if (!response.ok) {
+            return res.status(404).json({ weatherText: 'City is not found!' });
+        }
+
+        const data = await response.json();
+        const temperatureInCelsius = Math.floor(data.main.temp - 273.15);
+
+        res.status(200).json({
+            weatherText: `${cityName}: ${temperatureInCelsius}°C`
+        });
+    } catch (error) {
+        res.status(500).json({ error: 'Internal server error' });
+    }
+});
+
+export { app };

assignments/hackyourtemperature/babel.config.cjs

@@ -0,0 +1,13 @@
+module.exports = {
+  presets: [
+      [
+          // This is a configuration, here we are telling babel what configuration to use
+          '@babel/preset-env',
+          {
+              targets: {
+                  node: 'current'
+              }
+          }
+      ]
+  ]
+};

assignments/hackyourtemperature/jest.config.js

@@ -0,0 +1,8 @@
+export default {
+  // Tells jest that any file that has 2 .'s in it and ends with either js or jsx should be run through the babel-jest transformer
+  transform: {
+      '^.+\\.jsx?$': 'babel-jest'
+  },
+  // By default our `node_modules` folder is ignored by jest, this tells jest to transform those as well
+  transformIgnorePatterns: []
+};

assignments/hackyourtemperature/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "hackyourtemperature",
+  "version": "1.0.0",
+  "main": "server.js",
+  "scripts": {
+      "test": "jest",
+      "start": "node server.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "dependencies": {
+      "dotenv": "^16.4.7",
+      "express": "^4.21.1",
+      "express-handlebars": "^8.0.1",
+      "node-fetch": "^3.3.2"
+  },
+  "type": "module",
+  "devDependencies": {
+      "@babel/core": "^7.26.0",
+      "@babel/preset-env": "^7.26.0",
+      "babel-jest": "^29.7.0",
+      "jest": "^29.7.0",
+      "supertest": "^7.0.0"
+  }
+}

assignments/hackyourtemperature/server.js

@@ -0,0 +1,7 @@
+import { app } from './app.js';
+
+const port = 3000;
+
+app.listen(port, () => {
+    console.log(`App listening on port ${port}`);
+});

assignments/hackyourtemperature/sources/keys.js

@@ -0,0 +1,8 @@
+import dotenv from 'dotenv';
+dotenv.config(); 
+
+const keys = {
+  API_KEY: process.env.API_KEY, 
+};
+
+export default keys;