getMovieTitles.js

const https = require('https');
/*
 * Complete the function below.
 * Use console.log to print the result, you should not return from the function.
 */
function getMovieTitles(substr) {

  if (substr === '')
    return ''

  let titles = []

  const url = `https://jsonmock.hackerrank.com/api/movies/search/?Title=${substr}`

  const makeRestTasks = (totalPage, url) => {
    if (totalPage <= 1)
      return []

    let tasks = []
    while (totalPage > 1) {
      tasks.push(
        q(`${url}&page=${totalPage}`)
      )

      totalPage -= 1
    }

    return tasks
  }

  const q = url => {
    return new Promise((resolve, reject) => {
      https.get(url, res => {
        res.on('data', str => {
          let data = JSON.parse(str)
          resolve(data)
        })
      }).on('error', err => {
        reject(err)
      })
    })
  }

  q(url)
    .then(firstPageData => {
      let restTasks = makeRestTasks(firstPageData.total_pages, url)

      Promise.all(restTasks)
        .then(result => {
          let tmp = []
          result.map(item => {
            tmp = [...tmp, ...item.data]
          })
          titles = [...firstPageData.data, ...tmp]
            .map(item => item.Title)
            .sort((a, b) => a.localeCompare(b))

          console.log(titles)
        })
        .catch(err => {
          console.log(err)
        })
    })
    .catch(err => {
      console.log(err)
    })

}


getMovieTitles('spiderman')