server.js

'use strict';

const Hapi = require('hapi');
const Path = require('path');

const server = new Hapi.Server();

server.connection({ port: 3001, routes: { cors: true } });

let posts = [
  {
    id: 1,
    title: 'Post 1',
    body: 'This is Post n.1'
  },
  {
    id: 2,
    title: 'Post 2',
    body: 'This is Post n.2'
  }
];

var generateNextId = function(generateNextId) {
  let ids = posts.map((p) => {
    return p.id;
  });

  return Math.max.apply(Math, ids) + 1;
};

server.route({
  method: 'GET',
  path: '/api/posts',
  handler: function (req, reply) {
    return reply(JSON.stringify(posts));
  }
});

server.route({
  method: 'GET',
  path: '/api/posts/{id}',
  handler: function (req, reply) {
    let post = posts.filter((p) => {
      return p.id == req.params.id;
    })[0];

    if (post) {
      return reply(JSON.stringify(post));
    }
    return reply('Post not found').code(404);
  }
});

server.route({
  method: 'POST',
  path: '/api/posts',
  handler: function (req, reply) {
    var newPost = {
      id: generateNextId(),
      title: req.payload.title,
      body: req.payload.body
    };
    posts.push(newPost);
    return reply(newPost);
  }
});

server.route({
  method: 'DELETE',
  path: '/api/posts/{id}',
  handler: function (req, reply) {
    let pLength = posts.length;
    posts = posts.filter((p) => {
      return p.id != req.params.id;
    });
    if (pLength == posts.length) {
      return reply('Post not found').code(404);
    }
    return reply(true);
  }
});

server.route({
  method: 'PUT',
  path: '/api/posts/{id}',
  handler: function (req, reply) {
    let modified;
    posts.map((p) => {
      if (p.id == req.params.id) {
        p.title = req.payload.title;
        p.body = req.payload.body;
        modified = p;
      }
      return p;
    });
    if (modified) {
      return reply(modified);
    }
    return reply('Post not found').code(404);
  }
});

server.start((err) => {
  if (err) {
    throw err;
  }

  console.log('Server running at:', server.info.uri);
});