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Fetch Total Number of Viewable Hits

Fetches the current number of viewable hits on mturk.

  1. // ==UserScript==
  2. // @name        Fetch Total Number of Viewable Hits
  3. // @author      StubbornlyDesigned
  4. // @description Fetches the current number of viewable hits on mturk.
  5. // @namespace   https://greasyfork.org/en/users/35961-stubbornlydesigned
  6. // @version     1.1
  7. // @match       https://www.mturk.com/mturk/findhits?match=false*
  8. // @grant       none
  9. // ==/UserScript==
  10.  
  11. (function () {
  12.     var total = 0,
  13.         totalPages = 0,
  14.         hitsUrl = 'https://www.mturk.com/mturk/findhits?match=false&pageSize=100',
  15.         currentUrl = '';
  16.  
  17.     function parse(data) {
  18.         if(!data.querySelector('td[class="error_title"]')) {
  19.             var available = data.querySelectorAll('a[id^="number_of_hits"]');
  20.             totalPages = data.forms.hitGroupsForm.querySelector('td:nth-of-type(3) span:first-of-type a:last-of-type').search.match(/pageNumber=(\d+)/)[1];
  21.  
  22.             if(available.length) {
  23.                 [].slice.call(available).forEach(function(el) {
  24.                     total = (total + Number(el.parentElement.parentElement.lastElementChild.innerText.trim()));
  25.                 });
  26.  
  27.                 var next = '';
  28.  
  29.                 if(data.forms.hitGroupsForm.querySelector('td:nth-of-type(3) span:first-of-type').outerHTML.includes('Next')) {
  30.                     [].slice.call(data.forms.hitGroupsForm.querySelectorAll('td:nth-of-type(3) span:first-of-type a')).forEach(function(el) {
  31.                         if(el.innerText.includes('Next')) {
  32.                             next = el.href + '&pageSize=100';
  33.                         }
  34.                     });
  35.                 }
  36.  
  37.                 if(next) {
  38.                     return next;
  39.                 } else {
  40.                     return 'completed';
  41.                 }
  42.             }
  43.         }
  44.  
  45.         throw new Error('You have exceeded the maximum number of page requests.');
  46.     }
  47.  
  48.     function get(url) {
  49.         return new Promise(function(resolve, reject) {
  50.             var req = new XMLHttpRequest();
  51.             req.open('GET', url);
  52.             req.onload = function() {
  53.                 if (req.status == 200) {
  54.                     resolve(req.response);
  55.                 } else {
  56.                     reject(Error(req.statusText));
  57.                 }
  58.             };
  59.             req.responseType = 'document';
  60.             req.onerror = function() {
  61.                 reject(Error("error"));
  62.             };
  63.             req.send();
  64.         });
  65.     }
  66.  
  67.     function run() {
  68.         var url = !currentUrl ? hitsUrl : currentUrl;
  69.         get(url)
  70.             .then(function(res) {
  71.                 var nextMove = parse(res);
  72.                 var currentPage = url.match(/pageNumber=(\d+)/) ? url.match(/pageNumber=(\d+)/)[1] : 1;
  73.                 document.getElementById('totalAvailableHits').innerText = currentPage + ' / ' + totalPages;
  74.                 if(nextMove) {
  75.                     if(nextMove.includes('mturk')) {
  76.                         currentUrl = nextMove;
  77.                         setTimeout(function() {run();}, 200);
  78.                     } else if(nextMove == 'completed') {
  79.                         document.getElementById('totalAvailableHits').innerText = total;
  80.                         total = 0;
  81.                         totalPages = '';
  82.                         currentUrl = '';
  83.                     }
  84.                 }
  85.             })
  86.             .catch(function(err) {
  87.                 console.log(err);
  88.                 setTimeout(function() {run();}, 1000);
  89.             });
  90.     }
  91.  
  92.     function init() {
  93.         var el = document.getElementById('user_name_field');
  94.         el.setAttribute('id', 'totalAvailableHits');
  95.         el.innerText = 'Fetch Total Available Hits';
  96.         el.style.cursor = 'pointer';
  97.  
  98.         el.addEventListener('click', function() {run();});
  99.     }
  100.  
  101.     init();
  102. })();