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javascript:(function(){
  var cookies = ' --header \"Cookie:'+ document.cookie + '\" ';
  var course = $('div#course-logo-text > a > img').attr('alt');
  var START_UNIT=1;
  console.log('#!/bin/bash');
  $('a.list_header_link').each(function (index){
    var num_unit = index + 1;
    if (num_unit >= START_UNIT) {
      var name_unit = $(this).children('h3').text().trim();
      console.log('mkdir ' + '\"' + num_unit + '.' + name_unit  + '\"');
      console.log('cd ' + '\"' + num_unit + '.' +  name_unit  + '\"');
      $(this).next('ul.item_section_list').children('li').children('a.lecture-link').each(function (index) {
        var num_lecture = index + 1;
        var name_lecture = num_unit + '.' + num_lecture + '.' + $(this).text().trim();
        console.log('echo \"=== Downloading ' + course + "/" + name_unit + "/" + name_lecture + '\"');
        $(this).next('div.item_resource').children('a').each(function(index) {
          if (/\.mp4/.test($(this).attr('href'))) {
            console.log('curl -L' + cookies + '\"' + $(this).attr('href') + '\"' + ' > ' + 
              '\"' + name_lecture + '.mp4\"');
          } else if (/\.pptx/.test($(this).attr('href'))) {
            console.log('curl -L' + cookies + '\"' + $(this).attr('href') + '\"' + ' > ' +
              '\"' + name_lecture + '.pptx\"');
          } else if (/subtitles.*txt/.test($(this).attr('href'))) {
            console.log('curl -L' + cookies + '\"' + $(this).attr('href').replace('&format=txt', '') + '\"' + ' > ' + 
              '\"' + name_lecture + '.srt\"');
          } else if (/\.pdf/.test($(this).attr('href'))) {
            console.log('curl -L' + cookies + '\"' + $(this).attr('href') + '\"' + ' > ' + 
              '\"' + name_lecture + '.pdf\"');
          }    
        });
      });
      console.log('cd ..');
    }
  });  
})();