added currency script

exercises/05_functions_objects/currencyLogic.js

@@ -0,0 +1,69 @@
+'use strict'
+
+const puppeteer = require('puppeteer')
+const fs = require('fs')
+const request = require('request')
+const csv = require('fast-csv')
+
+const getRates = async query => {
+	const width = 1920
+	const height = 926
+	const browser = await puppeteer.launch({ headless: false})
+	const page = await browser.newPage()
+	await page.setViewport({ width: width, height: height })
+	await page.goto('https://www.travelex.co.uk/currency/exchange-rates', { waitUntil: 'domcontentloaded' })
+	await page.waitFor(5000)
+	try {
+		await page.click('a#loadAll')
+	} catch (error) {
+		console.log('the loadAll button has already been clicked.')
+	}
+	console.log('ready to grab page content')
+	//const html = await page.content()
+	const dom = await page.evaluate(() => {
+		const elements = document.querySelectorAll('div.row')
+		console.log(`found ${elements.length} rows.`)
+		const hotels = []
+		elements.forEach((element) => {
+			const quoteJson = {}
+			try {
+				//quoteJson.quote = element.innerText.replace(/  +/g, ',')
+				quoteJson.country = element.querySelector('span.col:first-child').innerText
+				//quoteJson.currencyStr = element.querySelector('span.col:nth-child(2)').innerText
+				quoteJson.currency = element.querySelector('span.col:nth-child(2)').innerText.split(' (')[0]
+				quoteJson.code = element.querySelector('span.col:nth-child(2)').innerText.split(' (')[1].replace(')', '')
+				quoteJson.rate = parseFloat(element.querySelector('span.col:nth-child(3)').innerText)
+			} catch (err) {
+				return new Error('oops')
+			}
+			hotels.push(quoteJson)
+		})
+		return hotels
+	})
+	await browser.close()
+	return dom
+}
+
+const getCurrency = callback => getRates().then(data => callback(null, data)).catch(err => callback(err))
+
+getCurrency( (err, data) => {
+	if(err) console.log('oops!')
+	console.log(`found ${data.length} CURRENCY codes`)
+	console.log(data.length)
+	fs.writeFileSync('currency.json', JSON.stringify(data, null, 2))
+})
+
+
+const getCountries = callback => {
+	const countryData = []
+	csv.fromStream(request('https://datahub.io/core/country-list/r/0.csv'))
+		.on('data', (data) => countryData.push({country: data[0], code: data[1]}))
+		.on('end', () => callback(null, countryData))
+}
+
+getCountries( (err, data) => {
+	if(err) console.log('oops!')
+	//console.log(data)
+	console.log(`found ${data.length} COUNTRY codes`)
+	fs.writeFileSync('countries.json', JSON.stringify(data, null, 2))
+})

exercises/05_functions_objects/quotes.js

@@ -9,7 +9,7 @@ const search = async query => {
 	const browser = await puppeteer.launch({ headless: true})
 	const page = await browser.newPage()
 	await page.setViewport({ width: width, height: height })
-	await page.goto(`https://www.brainyquote.com/search_results?q=${query}`, { waitUntil: 'domcontentloaded' })
+	await page.goto(`https://www.brainyquote.com/search_results?q=${query}`, { waitUntil: 'networkidle0' })
 	await autoScroll(page)
 	const dom = await page.evaluate(() => {
 		const elements = document.querySelectorAll('div.m-brick')

exercises/10_auth/jwt/authenticate.js

@@ -0,0 +1,20 @@
+
+'use strict'
+
+const jwt = require('koa-jwt')
+
+module.exports = function(ctx) {
+	if (ctx.request.body.password === 'password') {
+		ctx.status = 200
+		ctx.body = {
+			token: jwt.sign({ role: 'admin' }, 'A very secret key'), //Should be the same secret key as the one used is ./jwt.js
+			message: 'Successfully logged in!'
+		}
+	} else {
+		ctx.status = ctx.status = 401
+		ctx.body = {
+			message: 'Authentication failed'
+		}
+	}
+	return ctx
+}

exercises/10_auth/jwt/customerService.js

@@ -0,0 +1,33 @@
+'use strict'
+
+const customers = [
+	{
+		'id': 1,
+		'first_name': 'John',
+		'last_name': 'Smith',
+		'date_of_birth': '1993-04-23T00:00:00.000Z'
+	},
+	{
+		'id': 2,
+		'first_name': 'Justin',
+		'last_name': 'Bieber',
+		'date_of_birth': '1994-04-23T00:00:00.000Z'
+	}
+]
+
+let maxId = 2
+
+module.exports = {
+	getCustomers: function() {
+		return customers
+	},
+	getCustomer: function(id) {
+		return customers.find(customer => customer.id === parseInt(id) || customer.id === id)
+	},
+	postCustomer: function(customer) {
+		maxId++
+		customer.id = maxId
+		customers.push(customer)
+		return this.getCustomer(maxId)
+	}
+}

exercises/10_auth/jwt/index.js

@@ -0,0 +1,46 @@
+#!/usr/bin/env node
+
+'use strict'
+
+// https://blog.theodo.fr/2016/11/securize-a-koa-api-with-a-jwt-token/
+
+const Koa = require('koa')
+const Router = require('koa-router')
+//const koaBetterBody = require('koa-better-body')
+const bodyParser = require('koa-bodyparser')
+
+const app = new Koa()
+app.use(bodyParser())
+const router = new Router()
+
+const customerService = require('./customerService')
+const jwt = require('./jwt')
+const authenticate = require('./authenticate.js')
+
+//app.use(koaBetterBody({fields: 'body'}))
+
+router.post('/login', async ctx => {
+	authenticate(ctx)
+})
+
+router.get('/customer', jwt, async ctx => {
+	ctx.body = customerService.getCustomers()
+})
+
+router.get('/customer/:id', async ctx => {
+	if (customerService.getCustomer(this.params.id)) {
+		ctx.body = customerService.getCustomer(this.params.id)
+	} else {
+		this.status = 404
+		ctx.body = {'error': 'There is no customer with that id'}
+	}
+})
+
+router.post('/customer', async ctx => {
+	this.body = customerService.postCustomer(this.request.body)
+})
+
+app.use(router.routes())
+//.use(router.allowedMethods())
+
+app.listen(8080)

exercises/10_auth/jwt/jwt.js

@@ -0,0 +1,7 @@
+'use strict'
+
+const koaJwt = require('koa-jwt')
+
+module.exports = koaJwt({
+	secret: 'A very secret key', // Should not be hardcoded
+})

exercises/10_auth/jwt/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "jwt",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "koa": "^2.6.2",
+    "koa-better-body": "^3.0.4",
+    "koa-bodyparser": "^4.2.1",
+    "koa-jwt": "^3.5.1",
+    "koa-router": "^7.4.0"
+  }
+}