js-video-url-parser/lib/util.js

exports.getQueryParams = function getQueryParams(qs) {
  if (typeof qs !== 'string') {
    return {};
  }
  qs = qs.split('+').join(' ');

  var params = {};
  var match = qs.match(
    /(?:[?](?:[^=]+)=(?:[^&#]*)(?:[&](?:[^=]+)=(?:[^&#]*))*(?:[#].*)?)|(?:[#].*)/
  );
  var split;

  if (match === null) {
    return {};
  }

  split = match[0].substr(1).split(/[&#=]/);

  for (var i = 0; i < split.length; i += 2) {
    params[decodeURIComponent(split[i])] =
      decodeURIComponent(split[i + 1] || '');
  }

  return params;
};

exports.combineParams = function combineParams(op) {
  if (typeof op !== 'object') {
    return '';
  }
  op.params = op.params || {};
  var combined = '',
    i = 0,
    keys = Object.keys(op.params);

  if (keys.length === 0) {
    return '';
  }

  //always have parameters in the same order
  keys.sort();

  if (!op.hasParams) {
    combined += '?' + keys[0] + '=' + op.params[keys[0]];
    i += 1;
  }

  for (; i < keys.length; i += 1) {
    combined += '&' + keys[i] + '=' + op.params[keys[i]];
  }
  return combined;
};

//parses strings like 1h30m20s to seconds
function getLetterTime(timeString) {
  var totalSeconds = 0;
  var timeValues = {
    's': 1,
    'm': 1 * 60,
    'h': 1 * 60 * 60,
    'd': 1 * 60 * 60 * 24,
    'w': 1 * 60 * 60 * 24 * 7,
  };
  var timePairs;

  //expand to "1 h 30 m 20 s" and split
  timeString = timeString.replace(/([smhdw])/g, ' $1 ').trim();
  timePairs = timeString.split(' ');

  for (var i = 0; i < timePairs.length; i += 2) {
    totalSeconds += parseInt(timePairs[i], 10) *
      timeValues[timePairs[i + 1] || 's'];
  }
  return totalSeconds;
}

//parses strings like 1:30:20 to seconds
function getColonTime(timeString) {
  var totalSeconds = 0;
  var timeValues = [
    1,
    1 * 60,
    1 * 60 * 60,
    1 * 60 * 60 * 24,
    1 * 60 * 60 * 24 * 7,
  ];
  var timePairs = timeString.split(':');
  for (var i = 0; i < timePairs.length; i++) {
    totalSeconds += parseInt(timePairs[i], 10) * timeValues[timePairs.length - i - 1];
  }
  return totalSeconds;
}

exports.getTime = function getTime(timeString) {
  if (typeof timeString === 'undefined') {
    return 0;
  }
  if (timeString.match(/^(\d+[smhdw]?)+$/)) {
    return getLetterTime(timeString);
  }
  if (timeString.match(/^(\d+:?)+$/)) {
    return getColonTime(timeString);
  }
  return 0;
};