lecture_plan_udemy.js

// Get lecture plan for Udemy
var finalLecturePlan;

finalLecturePlan = getLecturePlan(2);

function getLecturePlan(hoursPerDay) {
  var times, totalTime;

  times = $('.lecture__item__link__time').map(function (idx, obj) {
    var $obj, timeStr, regex, execed, minutes, minuteSeconds, seconds, totalSeconds, $parent, lectureNumber;

    $obj = $(obj);
    timeStr = $obj.html();
    regex = /(\d+):(\d+)/;
    execed = regex.exec(timeStr);
    minutes = parseInt(execed[1]);
    minuteSeconds = minutes * 60;
    seconds = parseInt(execed[2]);
    totalSeconds = minuteSeconds + seconds;
    $parent = $obj.closest('.lecture__item__link');
    lectureNumberHTML = $parent.find('.mr5').html().replace(/\./g, "");
    lectureNumber = $.trim(lectureNumberHTML);
    return {
      totalSeconds: totalSeconds,
      lectureNumber: lectureNumber
    };
  });

  var totalSeconds = 0;
  for (var i = 0; i < times.length; i++) {
    totalSeconds += times[i]['totalSeconds'] << 0;
  }

  totalTime = totalSeconds.toString().toHHMMSS();
  console.log('Total Time:');
  console.log(totalTime);

  var startingIndex, perDay, perDayMax, secondsTotal, startingLecture, endIndex, nextAddition, newTotal, endLecture, newLecturePlan, lecturePlans;

  lecturePlans = [];
  startingIndex = 0;
  perDay = hoursPerDay * 60 * 60;
  perDayMax = perDay + 15 * 60;

  while(startingIndex < times.length - 1) {
    secondsTotal = 0;
    newTotal = 0;
    startingLecture = times[startingIndex]['lectureNumber'];
    endIndex = startingIndex;

    while(newTotal < perDay) {
      nextAddition = times[endIndex]['totalSeconds'];
      newTotal = secondsTotal + nextAddition;
      if (newTotal > perDayMax) {
        break;
      }

      endIndex++;
      secondsTotal = newTotal;
    }
    endLecture = times[endIndex]['lectureNumber'];

    newLecturePlan = {
      startingLecture: startingLecture,
      endLecture: endLecture
    }
    startingIndex = endIndex + 1;

    lecturePlans.push(newLecturePlan);
  }

  return lecturePlans;
}

String.prototype.toHHMMSS = function () {
  var sec_num = parseInt(this, 10); // don't forget the second param
  var hours   = Math.floor(sec_num / 3600);
  var minutes = Math.floor((sec_num - (hours * 3600)) / 60);
  var seconds = sec_num - (hours * 3600) - (minutes * 60);

  if (hours   < 10) {hours   = "0"+hours;}
  if (minutes < 10) {minutes = "0"+minutes;}
  if (seconds < 10) {seconds = "0"+seconds;}
  return hours+':'+minutes+':'+seconds;
}