parallel HTTP requests with Promises

challenge.js

const request =  require('request-promise')

const getURL = (url) => {
  console.log(`GET: ${url}`)
  // request the URL as a GET requests
  // parse the resonse using JSON.parse
}

const getPosts = () => {
  return getURL('https://jsonplaceholder.typicode.com/posts')
}

const getPost = (postId) => {
  return getURL(`https://jsonplaceholder.typicode.com/posts/${postId}`)
}


const getAllPostsWithDetails = () => {
  return getPosts().then(posts => {
    // use Promise.all here
    // for each post
    //   call getPost(post.id)
    //   then add the results to the post as post.details
  })
}

getAllPostsWithDetails().then(posts => {
  console.log(JSON.stringify(posts, null, 2))
})

solution.js

const request =  require('request-promise')

const getURL = (url) => {
  console.log(`GET: ${url}`)
  return request({method: 'GET', url})
    .then(json => JSON.parse(json))
}

const getURLS = (urls) => {
  return Promise.all(urls.map(getURL))
}

const getPosts = () => {
  return getURL('https://jsonplaceholder.typicode.com/posts')
}

const getPost = (postId) => {
  return getURL(`https://jsonplaceholder.typicode.com/posts/${postId}`)
}


const getAllPostsWithDetails = () => {
  return getPosts().then(posts => {
    return Promise.all(
      posts.map(post => getPost(post.id))
    ).then(postDetails => {
      posts.forEach((post, index) => {
        post.details = postDetails[index]
      })
      return posts
    })
  })
}

getAllPostsWithDetails().then(posts => {
  console.log(JSON.stringify(posts, null, 2))
})