Browser console bulk download from CSS selector and file extensions

browser-console-single-pdf-download.js

/**
 * README.md
 * 
 * # Browser console, bulk delayed download from CSS selector and file extensions
 * 
 * See below "var config" jsdoc for config details.
 * 
 * All functionallity encapsulated in "function main()"
 * 
 * main() is self executable (last line of the code).
 *
 * ## TODO
 * 
 * * Add finished confirmation after bulkDownloadDelayed()
 * 
 * ## ATTRIBUTION
 * * Download: http://stackoverflow.com/questions/833015/does-execcommand-saveas-work-in-firefox/833024
 * * JQuery Delayed function call: http://stackoverflow.com/questions/10860171/run-function-after-delay
 */
 
 /**
  * Alternative for public files:
  * wget --recursive --level=1 --no-directories --no-host-directories --accept pdf http://example.com
  * ATTRIBUTION: http://superuser.com/questions/260087/download-all-pdf-links-in-a-web-page
  **/

//My old oneliner to copy paste
//var selector='.download-document a';var url = $(selector).attr('href'); var a = document.createElement('a'); a.setAttribute('download', 'mydownload.down'); a.href = url; a.style.display = 'none'; document.body.appendChild(a); a.click();
/**
 * [config description]
 * @type {Object}
 * @param {String} targetAnchorsSelector - CSS selector of target elements
 * @param {String}[] targetExtensions - without '.'
 * @param {int} downloadDelay - in seconds
 */
var config = {};
config.targetAnchorsSelector = '.listItems .block a';
config.targetExtensions = ['vsd', 'pdf', 'mp4'];
config.downloadDelay = 10000;

function filterAnchors(DOMarray, regexString) {
  return $(DOMarray).filter(function(index) {
    var regex = new RegExp(regexString, 'g');
    return $(this).attr('href').match(regex);
  });
};

//from: http://stackoverflow.com/questions/833015/does-execcommand-saveas-work-in-firefox/833024
function download(url) {
  var a = document.createElement('a');
  a.setAttribute('download', 'mydownload.down');
  a.href = url;
  a.style.display = 'none';
  document.body.appendChild(a);
  a.click();
};

//from: http://stackoverflow.com/questions/10860171/run-function-after-delay
function bulkDownloadDelayed(urlArr, delay) {
  delay = delay || 1000;
  $.each(urlArr, function(i, url) {
    $(document).delay(delay).queue(function() {
      console.log('Downloading url: %O', url);
      download(url);
      $(this).dequeue();
    });
  });
};

function main(config) {
  var anchors = $(config.targetAnchorsSelector);
  //console.log('anchors: %O', anchors);

  var filteredAnchors = [];
  $.each(config.targetExtensions, function(i, extension) {
    var extensionRegex = '.' + extension + '$';
    var auxFiltered = filterAnchors(anchors, extensionRegex);
    //console.log('auxFiltered for regex %O: %O', extensionRegex, auxFiltered);
    filteredAnchors = filteredAnchors.concat(auxFiltered.toArray());
  });
  //console.log('filteredAnchors: %O', filteredAnchors);

  var urls = jQuery.map(filteredAnchors, function(val, i) {
    return $(val).attr('href');
  });
  //console.log('urls: %O', urls);

  var urlsUnique = jQuery.unique(urls);
  console.log('urlsUnique: %O', urlsUnique);

  console.log('Last download will start in ' + ((downloadDelay / 1000) * urlsUnique.length));

  bulkDownloadDelayed(urlsUnique, config.downloadDelay);
};

main(config);