Grab subtitles

gistfile1.js

var postURLs = [];
var movieLinks = $('dl dt b a');
var transcriptData = [];

var extractSubs = function(subs) {
	var output = '';
	var start;
	var end;
	var text = '';

	var hour = 0;
	var min = 0;
	var sec = 0;
	var frac = 0;

	var pad = function(time) {
	  return time < 10 ? '0' + time : '' + time;
	}

	var formatTime = function(hour, min, sec, frac) {
	  return pad(hour) + ':' + pad(min) + ':' + pad(sec) + ',' + frac;
	}

	var convertDuration = function(dur) {
	  var h, m, s, f;
	  var time = parseFloat(dur, 10);
	  h = Math.floor(time / 60 / 60);
	  m = parseInt((time/60 - h), 10)
	  s = parseInt(time % 60, 10)
	  f = parseInt((time - Math.floor(time)) * 1000, 10);

	  return formatTime(h, m, s, f);
	}

	//loop through all but the last item which I will handle manually later
	for (var i = 0; i < subs.length - 1; i++) {
	    start = subs[i].attributes['data-duration'].value;
	    end = subs[i + 1].attributes['data-duration'].value;
	    text = subs[i].innerHTML;

	    output += '' +
	      (i + 1) + '\n' +
	      convertDuration(start) + ' --> ' + convertDuration(end) + '\n' +
	      text + '\n\n';
	}

	//the above loop won't work for the last item since it has a subs[i +1] that will throw an error
	//so I manually perform the last loop and then return the result of the entire string
	//concatenation.
	var results = (function lastLoop() {
	    var item = subs[subs.length - 1];
	    start = item.attributes['data-duration'].value;
	    end = parseFloat(start, 10) + 5;
	    text = item.innerHTML;

	    output += '' +
	      (i + 1) + '\n' +
	      convertDuration(start) + ' --> ' + convertDuration(end) + '\n' +
	      text + '\n\n';

	      return output;
	})()

	// console.log(results);
	return results;
};

var processResponse = function(data, num) {
	var el = document.createElement('div');
	el.innerHTML = data.VideoTranscriptHtml;
	var rawSubs = el.querySelectorAll('.transcript');
	transcriptData[num] = extractSubs(rawSubs);
};

var ajaxCall = function(url, num) {
	$.ajax({
		"url": url,
		type: 'POST',
		success: function(res) {
			console.log(res);
			processResponse(res, num);}
	})	
};

var performAllAjaxCalls = function() {
	//build the array of URLs to use for your POST request
	for (var i = 0; i < movieLinks.length; i++) {
  		postURLs.push(movieLinks[i].id.replace('lnk-', '/CourseTranscript/'));
	}

	//perform all the POST requests for postURLs.
	//Via processResponse, write the answers to the transcriptData array
	for (var i = 0; i < postURLs.length; i++) {
		ajaxCall(postURLs[i], i);
	}
};

var logOutResults = function() {
	for (var i = 0; i < transcriptData.length; i++) {console.log(transcriptData[i], '\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n')}
};

var init = function() {
	performAllAjaxCalls();
	setTimetout(logOutResults, 5000);
};
init();