Samira w2 node.js

.gitignore

@@ -8,3 +8,5 @@ yarn-error.log
 *.bkp
 
 week3/prep-exercise/server-demo/
+
+.env

assignments/hackyourtemperature/app.js

@@ -0,0 +1,49 @@
+// Import necessary modules
+import express from 'express';
+import fetch from 'node-fetch';
+import keys from './sources/keys.js';
+
+// Initialize Express app
+const app = express();
+
+// Middleware to parse JSON request bodies
+app.use(express.json());
+
+// Define a simple GET route
+app.get('/', async (req, res) => {
+  res.send("Hello from backend to frontend")
+});
+
+// Post route to fetch weather data
+app.post('/weather', async (req, res) => {
+  // Extract city name from request body
+  const { cityName } = req.body;  
+
+  // Validate the request
+  if (!cityName) {
+    return res.status(400).json({ weatherText: "City name is required" }); 
+  }
+  try {
+    // Fetch weather data from OpenWeatherMap API using provided city name and API key
+    const response = await fetch(
+      `https://api.openweathermap.org/data/2.5/weather?q=${cityName}&appid=${keys.API_KEY}&units=metric`
+    );
+    const data = await response.json();
+
+
+    if (data.cod !== 200) {
+      return res.status(404).json({ weatherText: "City is not found" });
+    }
+
+    // return fetched weather data
+    res.json({
+      temperature: data.main.temp,
+     weatherText: `The temperature in ${data.name} is ${data.main.temp}°C`
+
+    });
+
+  } catch (error) {
+    res.status(500).json({ weatherText: "Server error" });
+  }
+});
+export default app;

assignments/hackyourtemperature/app.test.js

@@ -0,0 +1,36 @@
+// Import required modules for testing
+import request from "supertest";
+import app from "./app.js";
+
+// Define test suite for POST /weather route
+describe("POST /weather" , () => {
+  it("should return weather data for a valid city", async () => {
+    const response = await request(app)
+     .post('/weather')
+     .send({ cityName: "London" });
+
+    expect(response.status).toBe(200);
+    expect(response.body).toHaveProperty("temperature");
+    expect(response.body.temperature).toBeGreaterThan(-50);
+    expect(response.body.temperature).toBeLessThan(60);
+  });
+
+  it("should return an error for an invalid city", async () => {
+    const response = await request(app)
+     .post('/weather')
+     .send({ cityName: "InvalidCity" });
+
+    expect(response.status).toBe(404);
+    expect(response.body).toHaveProperty("weatherText", "City is not found");
+  });
+
+  it("should return an error for an empty city", async () => {
+    const response = await request(app)
+     .post('/weather')
+     .send({ cityName: "" });
+
+    expect(response.status).toBe(400);
+    expect(response.body).toHaveProperty("weatherText", "City name is required");
+  });
+}); 
+

assignments/hackyourtemperature/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "hackyourtemperature",
+  "version": "1.0.0",
+  "main": "server.js",
+  "scripts": {
+    "test": "jest",
+    "start": "node server.js"
+  },
+  "keywords": [],
+  "type": "module",
+  "author": "[email protected]",
+  "license": "ISC",
+  "dependencies": {
+    "dotenv": "^16.4.7",
+    "express": "^4.21.2",
+    "express-handlebars": "^8.0.1",
+    "node-fetch": "^2.7.0"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.26.9",
+    "@babel/preset-env": "^7.26.9",
+    "babel-jest": "^29.7.0",
+    "cross-env": "^7.0.3",
+    "jest": "^29.7.0",
+    "supertest": "^7.0.0",
+    "ts-jest": "^29.2.6"
+  },
+  "directories": {
+    "test": "tests"
+  },
+  "description": ""
+}

assignments/hackyourtemperature/server.js

@@ -0,0 +1,8 @@
+import app from './app.js';
+
+const PORT = 3000;
+
+// Start the server on the specified port
+app.listen(PORT, () => {
+    console.log(`Server is runnig on port ${PORT}`);
+});

assignments/hackyourtemperature/sources/keys.js

@@ -0,0 +1,7 @@
+import dotenv from "dotenv";
+dotenv.config();
+
+export default { 
+    BASE_URL:process.env.BASE_URL,
+    API_KEY:process.env.API_KEY,
+};