server-pages/server-status.js

const urlMetadata = require('url-metadata')
const csv = require('csvtojson')
const log = console.log
const { spawnSync } = require( 'child_process' ),
	uptime = spawnSync( 'uptime', [ '-s' ] )

const csvFilePath = 'server-pages.csv'
// const csvFilePath = 'server-pages-test.csv'

// consider webpage to be up if stored title matches fetched title
const checkIfTitleMatches = obj => {
  // console.log(obj['url'])
  // console.log(urlMetadata(obj['url']))
  return urlMetadata(obj['url']).then(metadata => { // success handler
    // log(metadata.title, obj['siteTitle'])
    if (metadata.title == obj['siteTitle']) {
        obj['status'] = 'up'
      } else {
        obj['status'] = 'down'
      }
      // return true
    },
    error => { // failure handler
      console.log(error)
      obj['status'] = 'down'
      // return false
    }).catch(function(err) {
      console.log(err);
    })
}

// update all sites' status in JSON
const updateSiteStatus = json => { 
  const promiseArray = []
  json.forEach(async function (obj) {
    if (obj['siteTitle'] != '') {
      promiseArray.push(checkIfTitleMatches(obj))
    } else{
      obj['status'] = 'up'
    }
  })
  return promiseArray
}

csv().fromFile(csvFilePath).then(async function (json) {
  // finish updating all sites' status before outputting JSON
  Promise.all(updateSiteStatus(json)).then(results => {
    const statusJson = {
      "sites": json,
      "updateTime": Date.now(),
      "upSince": `${uptime.stdout.toString()}`.replace(/\n/g, ''),
    }
    // console.log(JSON.stringify(statusJson))
    console.log(JSON.stringify(statusJson, null, 2))
  })
})