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‎README.md

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<<<<<<< HEAD
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> Please help us improve and share your feedback! If you find better tutorials or links, please share them by opening a Pull Request.
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# HackYourFuture - Node.js
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There are two reasons why we at HYF choose Node.JS over others:
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1) You already know JavaScript, so it's easier to get started than other languages
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2) Node.js is great for making web APIs because it is asynchronous by nature and thus allows for high input/output. By this we mean that it allows many users to make very light requests at the same time.
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2) Node.js is great for making web APIs because it is asynchronous by nature and thus allows for high input/output. By this we mean that it allows many users to make very light requests at the same time.
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=======
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# TODO API
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This is an Express application using `bodyParser` middleware to convert the request body to JSON.
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There are currently four actions:
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- `list` (`GET /todos`): Lists all todos
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- `create` (`POST /todos`): Creates a new todo
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- `update` (`PUT /todos/:id`): Updates the description of a todo
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- `remove` (`DELETE /todos/:id`): Deletes a todo
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## Directory structure
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- `actions`: Contains the actions as listed above, each as a express handler (function accepting request and response)
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- `data`: Contains the data file `todos.json`
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- `models`: Contains the Todo model class
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- `util`: Utility functions
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- `index.js` The application file
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## Request body format
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When calling the `create` or `update` actions, the request body should look like this:
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```json
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{
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"todo": {
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"description": "(todo description)"
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}
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}
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```
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Note that for these actions, the client should add the following header:
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- `Content-Type`: `application/json`
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In Postman, make sure to add this header, and set the Body type to "Raw".
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## UUIDs
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For IDs, this application uses "UUIDs" (Universally Unique IDs). They can be generated using the `uuid` package, and are guaranteed never to be the same.
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>>>>>>> class7-nodejs-week3/master

‎class7-nodejs-week3

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‎class7-week3/README.md

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# TODO API
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This is an Express application using `bodyParser` middleware to convert the request body to JSON.
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There are currently four actions:
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- `list` (`GET /todos`): Lists all todos
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- `create` (`POST /todos`): Creates a new todo
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- `update` (`PUT /todos/:id`): Updates the description of a todo
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- `remove` (`DELETE /todos/:id`): Deletes a todo
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## Directory structure
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- `actions`: Contains the actions as listed above, each as a express handler (function accepting request and response)
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- `data`: Contains the data file `todos.json`
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- `models`: Contains the Todo model class
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- `util`: Utility functions
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- `index.js` The application file
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## Request body format
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When calling the `create` or `update` actions, the request body should look like this:
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```json
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{
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"todo": {
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"description": "(todo description)"
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}
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}
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```
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Note that for these actions, the client should add the following header:
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- `Content-Type`: `application/json`
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In Postman, make sure to add this header, and set the Body type to "Raw".
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## UUIDs
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For IDs, this application uses "UUIDs" (Universally Unique IDs). They can be generated using the `uuid` package, and are guaranteed never to be the same.

‎class7-week3/actions/create.js

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const Todo = require('../models/todo')
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const deserializeTodo = require('../util/deserializeTodo')
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module.exports = function create(request, response) {
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const todo = deserializeTodo(request, response)
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if (todo == null) { return }
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Todo.create(todo.description, (error, todo) => {
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if (error) {
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console.error(error)
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response.status(500)
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response.json({error: 'Internal error'})
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} else {
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response.status(201)
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response.json({todo})
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}
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})
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}

‎class7-week3/actions/index.js

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module.exports = {
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list: require('./list'),
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create: require('./create'),
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update: require('./update'),
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remove: require('./remove')
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}

‎class7-week3/actions/list.js

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const Todo = require('../models/todo')
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module.exports = function list(request, response) {
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// Load todos asynchronously (with a callback)
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Todo.load((error, todos) => {
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if (error) {
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response.status(500)
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response.json({error: 'Internal error'})
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} else {
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response.json({todos})
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response.end()
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}
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})
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}

‎class7-week3/actions/remove.js

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const Todo = require('../models/todo')
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module.exports = function create(request, response) {
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const id = request.params.id
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Todo.remove(id, error => {
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if (error) {
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console.error(error)
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response.status(500)
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response.json({error: 'Internal error'})
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} else {
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response.status(204)
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response.end()
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}
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})
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}

‎class7-week3/actions/update.js

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const Todo = require('../models/todo')
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const deserializeTodo = require('../util/deserializeTodo')
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module.exports = function update(request, response) {
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const id = request.params.id
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const todo = deserializeTodo(request, response)
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if (todo == null) { return }
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Todo.update(id, todo.description, (error, todo) => {
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if (error == null) {
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response.json({todo})
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} else if (error.name === 'NotFound') {
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response.status(404)
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response.json({error: error.message})
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} else {
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console.error(error)
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response.status(500)
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response.json({error: 'Internal error'})
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}
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})
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}

‎class7-week3/data/todos.json

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[{"id":"f3e2462d-0bfb-46f2-8ea8-4fc7020f0f30","description":"Go into bed","done":false},{"id":"a2e2a68e-1a49-4fb5-ba66-f618a523e631","description":"Go into bed","done":false},{"id":"c8f9c333-2372-41c9-bc7b-3448b61f3371","description":"Do something","done":false},{"id":"bde9faac-582c-4536-8d01-b98252618340","description":"Blablabla","done":false}]

‎class7-week3/index.js

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const Express = require('express')
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const bodyParser = require('body-parser')
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const app = Express()
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app.use(bodyParser.json())
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const {list, create, update, remove} = require('./actions')
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app.get('/todos', list)
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app.post('/todos', create)
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app.put('/todos/:id', update)
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app.delete('/todos/:id', remove)
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app.listen(3000)

‎class7-week3/models/todo.js

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const FS = require('fs')
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const Path = require('path')
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const uuid = require('uuid/v4')
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const filename = Path.resolve(__dirname, '../data/todos.json')
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class Todo {
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load(callback) {
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FS.readFile(filename, 'utf-8', (error, data) => {
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if (error) {
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callback(error)
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} else {
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callback(null, JSON.parse(data))
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}
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})
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}
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save(todos, callback) {
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FS.writeFile(filename, JSON.stringify(todos), callback)
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}
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create(description, callback) {
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this.load((error, todos) => {
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if (error) { callback(error); return }
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const todo = {
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id: uuid(),
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description,
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done: false
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}
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todos.push(todo)
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this.save(todos, error => {
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if (error) { callback(error); return }
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callback(null, todo)
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})
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})
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}
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update(id, description, callback) {
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this.load((error, todos) => {
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if (error) { callback(error); return }
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const todo = todos.find(t => t.id === id)
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if (todo == null) {
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const error = new Error(`Todo with ID ${id} does not exist`)
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error.name = 'NotFound'
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callback(error)
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return
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}
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todo.description = description
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this.save(todos, error => {
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if (error) { callback(error); return }
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callback(null, todo)
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})
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})
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}
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remove(id, callback) {
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this.load((error, todos) => {
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if (error) { callback(error); return }
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todos = todos.filter(t => t.id !== id)
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this.save(todos, error => {
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if (error) { callback(error); return }
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callback()
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})
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})
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}
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}
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module.exports = new Todo()

‎class7-week3/node_modules/.bin/mime

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‎class7-week3/node_modules/.bin/uuid

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