Assignments week 2 Nikita

hackyourtemperature/__tests__/app.test.js

@@ -0,0 +1,45 @@
+import app from '../app.js'
+import supertest from 'supertest'
+import fetch from 'node-fetch'
+
+jest.mock('node-fetch', () => jest.fn())
+
+const request = supertest(app)
+
+describe('POST /', () => {
+  it('returns temperature for a valid city', async () => {
+    const fakeGeoData = [{ lat: 52.37, lon: 4.89 }]
+    const fakeWeatherData = {
+      main: {
+        temp: 283.15,
+      },
+    }
+
+    fetch
+      .mockResolvedValueOnce({
+        json: async () => fakeGeoData,
+      })
+      .mockResolvedValueOnce({
+        json: async () => fakeWeatherData,
+      })
+
+    const response = await request.post('/').send({ cityName: 'Amsterdam' })
+
+    expect(response.statusCode).toBe(200)
+    expect(response.body).toEqual({
+      cityName: 'Amsterdam',
+      temperature: '10.0',
+    })
+  })
+
+  it('returns error message for unknown city', async () => {
+    fetch.mockResolvedValueOnce({
+      json: async () => [],
+    })
+
+    const response = await request.post('/').send({ cityName: 'FakeCityXYZ' })
+
+    expect(response.statusCode).toBe(200)
+    expect(response.body).toBe('City is not found')
+  })
+})

hackyourtemperature/app.js

@@ -0,0 +1,48 @@
+import express from 'express'
+import { engine } from 'express-handlebars'
+import fetch from 'node-fetch'
+import { API_KEY } from './sources/keys.js'
+
+
+const app = express()
+
+app.engine('handlebars', engine())
+app.set('view engine', 'handlebars')
+app.set('views', './views')
+
+app.get('/', (req, res) => {
+  res.render('home')
+})
+
+app.use(express.json())
+
+app.post('/', async (req, res) => {
+  try {
+    const cityName = req.body.cityName
+    const geoData = await fetch(
+      `http://api.openweathermap.org/geo/1.0/direct?q=${cityName}&limit=1&appid=${API_KEY}`
+    )
+    const geoResponse = await geoData.json()
+    console.log(geoResponse)
+    if (geoResponse.length == 0) {
+      throw new Error('City is not found')
+    }
+
+    const lat = geoResponse[0].lat
+    const lon = geoResponse[0].lon
+    console.log(lat, lon)
+
+    const weatherData = await fetch(
+      `https://api.openweathermap.org/data/2.5/weather?lat=${lat}&lon=${lon}&appid=${API_KEY}`
+    )
+    const weatherResponse = await weatherData.json()
+    res.json({ 
+      cityName: cityName,
+      temperature: (weatherResponse.main.temp - 273.15).toFixed(1)
+    });
+  } catch (err) {
+    res.json(err.message)
+  }
+})
+
+export default app

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",
+        },
+      },
+    ],
+  ],
+};

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: [],
+};

hackyourtemperature/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "hackyourtemperature",
+  "version": "1.0.0",
+  "main": "server.js",
+  "type": "module",
+  "scripts": {
+    "test": "jest",
+    "start": "node server.js",
+    "dev": "nodemon server.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "dependencies": {
+    "@babel/preset-env": "^7.27.2",
+    "babel-jest": "^29.7.0",
+    "express": "^5.1.0",
+    "express-handlebars": "^8.0.3",
+    "jest": "^29.7.0",
+    "node-fetch": "^3.3.2",
+    "nodemon": "^3.1.10",
+    "supertest": "^7.1.0"
+  }
+}

hackyourtemperature/server.js

@@ -0,0 +1,5 @@
+import app from './app.js'
+
+app.listen(3000, () => {
+  console.log(`server started on http://localhost:3000`)
+})

hackyourtemperature/sources/keys.js

@@ -0,0 +1 @@
+export const API_KEY = '7d47d5f41dcdf3b026655cb15bf3ff0a'

hackyourtemperature/views/layouts/main.handlebars

@@ -0,0 +1 @@
+<h1>Hello from backend to frontend!</h1>

week1/prep-exercises/1-web-server/server.js

@@ -1,14 +1,43 @@
 /**
  * Exercise 3: Create an HTTP web server
  */
-
-const http = require('http');
+const fs = require('fs').promises
+const path = require('path') 
+const http = require('http')
 
 //create a server
-let server = http.createServer(function (req, res) {
+let server = http.createServer(async function (req, res) {
   // YOUR CODE GOES IN HERE
-	res.write('Hello World!'); // Sends a response back to the client
-	res.end(); // Ends the response
-});
+  try {
+    if (req.url === '/') {
+      const data = await fs.readFile(path.join(__dirname, 'index.html'))
+      res.writeHead(200, {
+        'Content-Type': 'text/html',
+      })
+      res.end(data)
+    } else if (req.url === '/index.js') {
+      const data = await fs.readFile(path.join(__dirname, 'index.js'))
+      res.writeHead(200, {
+        'Content-Type': 'application/javascript',
+      })
+      res.end(data)
+    } else {
+      res.writeHead(404, {
+        'Content-Type': 'text/plain',
+      })
+      res.end('404 not found')
+    }
+  } catch (err) {
+    res.writeHead(500, {
+      'Content-Type': 'text/plain',
+    })
+    res.end('server error')
+    console.error(err)
+  }
+  //   res.write('Hello World!') // Sends a response back to the client
+  //   res.end() // Ends the response
+})
 
-server.listen(3000); // The server starts to listen on port 3000
+server.listen(3000, () => {
+  console.log('server is running (listen on port 3000)')
+}) // The server starts to listen on port 3000

week2/practice-exercises/1-joke-api/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "1-joke-api",
+  "type": "module",
+  "version": "1.0.0",
+  "description": "Did you know that there is an API for Chuck Norris jokes? That's incredible, right!?",
+  "main": "script.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "node-fetch": "^3.3.2"
+  }
+}

week2/practice-exercises/1-joke-api/script.js

@@ -1,18 +1,25 @@
 /**
  * 1. Chuck Norris programs do not accept input
- * 
+ *
  * `GET` a random joke inside the function, using the API: http://www.icndb.com/api/
- * (use `node-fetch`) and print it to the console. 
+ * (use `node-fetch`) and print it to the console.
  * Make use of `async/await` and `try/catch`
- * 
+ *
  * Hints
  * - To install node dependencies you should first initialize npm
  * - Print the entire response to the console to see how it is structured.
  */
+import fetch from 'node-fetch'
 
-function printChuckNorrisJoke() {
-  // YOUR CODE GOES IN HERE
-
+async function printChuckNorrisJoke() {
+  try {
+    const response = await fetch('https://api.chucknorris.io/jokes/random')
+    // const body = await response.text()
+    const data = await response.json()
+    // console.log(response);
+    console.log(data.value)
+  } catch (err) {
+    console.error(err)
+  }
 }
-
-printChuckNorrisJoke();
+printChuckNorrisJoke()

week2/prep-exercises/1-blog-API/My first blog

@@ -0,0 +1 @@
+Lorem ipsum

week2/prep-exercises/1-blog-API/package.json

@@ -5,11 +5,12 @@
   "main": "server.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "start": "node server.js"
+    "start": "nodemon server.js"
   },
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "express": "^4.17.1"
+    "express": "^4.17.1",
+    "nodemon": "^3.1.10"
   }
 }

week2/prep-exercises/1-blog-API/server.js

@@ -1,10 +1,64 @@
 const express = require('express')
-const app = express();
-
+const app = express()
+const fs = require('fs')
+
+app.use(express.json()) // to read requests format in JSON
+
+app.post('/blogs', (req, res) => {
+  // const content = req.body.content
+  // const title = req.body.title
+  const { title, content } = req.body
+  fs.writeFileSync(title, content)
+  res.end('ok')
+})
+
+app.put('/posts/:title', (req, res) => {
+  // console.log(req.query)
+  const { title, content } = req.body
+  if (title || content) {
+    if (fs.existsSync(title)) {
+      fs.writeFileSync(title, content)
+      res.end('ok')
+    } else {
+      res.end('This post does not exist!')
+    }
+  } else {
+    res.end('the request does not have a title and/or content')
+  }
+})
+
+app.delete('/blogs/:title', (req, res) => {
+  // console.log(req.params.title)
+  const title = req.params.title
+  if (fs.existsSync(title)) { 
+    fs.unlinkSync(title);
+    res.end('ok');
+  } else {
+    res.end('This blog does not exist!')
+  }
+})
+
+app.get('/blogs/:title', (req, res) => {
+
+  // How to get the title from the url parameters?
+  const title = req.params.title
+  // check if post exists
+  if (fs.existsSync(title)) {
+    const post = fs.readFileSync(title);
+    res.end(`Your post content is: ${post}`)
+  } else {
+    res.end('This post does not exist!')
+  }
+
+
+  // send response
+})
 
 // YOUR CODE GOES IN HERE
 app.get('/', function (req, res) {
   res.send('Hello World')
 })
-
-app.listen(3000)
+
+app.listen(3000, () => {
+  console.log(`server started on http://localhost:3000`)
+})