'use strict';

module.exports = function str_pad(input, padLength, padString, padType) {
  // eslint-disable-line camelcase
  //  discuss at: https://locutus.io/php/str_pad/
  // original by: Kevin van Zonneveld (https://kvz.io)
  // improved by: Michael White (https://getsprink.com)
  //    input by: Marco van Oort
  // bugfixed by: Brett Zamir (https://brett-zamir.me)
  //   example 1: str_pad('Kevin van Zonneveld', 30, '-=', 'STR_PAD_LEFT')
  //   returns 1: '-=-=-=-=-=-Kevin van Zonneveld'
  //   example 2: str_pad('Kevin van Zonneveld', 30, '-', 'STR_PAD_BOTH')
  //   returns 2: '------Kevin van Zonneveld-----'

  var half = '';
  var padToGo = void 0;

  var _strPadRepeater = function _strPadRepeater(s, len) {
    var collect = '';

    while (collect.length < len) {
      collect += s;
    }
    collect = collect.substr(0, len);

    return collect;
  };

  input += '';
  padString = padString !== undefined ? padString : ' ';

  if (padType !== 'STR_PAD_LEFT' && padType !== 'STR_PAD_RIGHT' && padType !== 'STR_PAD_BOTH') {
    padType = 'STR_PAD_RIGHT';
  }
  if ((padToGo = padLength - input.length) > 0) {
    if (padType === 'STR_PAD_LEFT') {
      input = _strPadRepeater(padString, padToGo) + input;
    } else if (padType === 'STR_PAD_RIGHT') {
      input = input + _strPadRepeater(padString, padToGo);
    } else if (padType === 'STR_PAD_BOTH') {
      half = _strPadRepeater(padString, Math.ceil(padToGo / 2));
      input = half + input + half;
      input = input.substr(0, padLength);
    }
  }

  return input;
};
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