osa3

.gitignore

+node_modules

Procfile

+web: node index.js

index.js

+//toimivat 3.1-3.6
+
+const http = require('http')
+const express = require('express')
+const app = express()
+
+const bodyParser = require('body-parser')
+app.use(bodyParser.json())
+
+const cors = require('cors')
+app.use(cors())
+
+let persons = [
+  {
+    name: "Arto Hellas",
+    number: "040-123456",
+    id: 1
+  },
+  {
+    name: "Martti Tienari",
+    number: "040-123456",
+    id: 2
+  },
+  {
+    name: "Arto Järvinen",
+    number: "040-123456",
+    id: 3
+  },
+  {
+    name: "Lea Kutvonen",
+    number: "040-123456",
+    id: 4
+  }
+]
+app.get('/', (req, res) => {
+  res.send('<h1>Hello World!</h1>')
+})
+
+app.get('/api/persons', (req, res) => {
+  res.json(persons)
+})
+
+app.get('/api/persons/:id', (request, response) => {
+  const id = Number(request.params.id)
+  const person = persons.find(person => person.id === id )
+
+  if (person){
+  response.json(person)
+}else{
+  response.status(404).end()
+}
+})
+
+app.delete('/api/persons/:id' , (request, response) =>{
+  const id = Number(request.params.id)
+  persons = persons.filter(person => person.id !== id)
+
+  response.status(204).end()
+})
+
+const generateId = () => {
+  const minId = Math.ceil(persons.length > 0 ? persons.map(n => n.id).sort((a,b) => a - b).reverse()[0] : 1)
+  const maxId = Math.floor(1000)
+  return Math.floor(Math.random() * (maxId - minId));
+}
+
+app.post('/api/persons', (request, response) => {
+  const body = request.body
+  const person_list = () => persons.map(part => part.name)
+
+  if ((body.name && body.number) === undefined) {
+    return response.status(400).json({error: 'Please check the input, there is some content missing.'})
+  }
+
+  if ((person_list().includes(body.name))){
+    return response.status(400).json({error: 'Sorry, but the name must be unique.'})
+    console.log("name must be unique!");
+  }
+
+  const person = {
+    name: body.name,
+    number: body.number,
+    id: generateId()
+  }
+
+  persons = persons.concat(person)
+
+  response.json(person)
+})
+
+const error = (request, response) => {
+  response.status(404).send({error: 'unknown endpoint'})
+}
+
+app.use(error)
+
+const PORT = process.env.PORT || 3001
+app.listen(PORT, () => {
+  console.log(`Server running on port ${PORT}`)
+})

package.json

+{
+  "name": "osa3",
+  "version": "1.0.0",
+  "description": "osa3",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js",
+    "watch": "nodemon index.js"
+  },
+  "author": "Suvi Hyvonen",
+  "license": "ISC",
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^4.16.4"
+  },
+  "devDependencies": {
+    "nodemon": "^1.18.10"
+  }
+}