HORIZON PROJECT

var createPadding = require('./_createPadding'),

    stringSize = require('./_stringSize'),

    toInteger = require('./toInteger'),

    toString = require('./toString');

/**

 * Pads `string` on the left side if it's shorter than `length`. Padding

 * characters are truncated if they exceed `length`.

 *

 * @static

 * @memberOf _

 * @since 4.0.0

 * @category String

 * @param {string} [string=''] The string to pad.

 * @param {number} [length=0] The padding length.

 * @param {string} [chars=' '] The string used as padding.

 * @returns {string} Returns the padded string.

 * @example

 *

 * _.padStart('abc', 6);

 * // => '   abc'

 *

 * _.padStart('abc', 6, '_-');

 * // => '_-_abc'

 *

 * _.padStart('abc', 3);

 * // => 'abc'

 */

function padStart(string, length, chars) {

  string = toString(string);

  length = toInteger(length);

  var strLength = length ? stringSize(string) : 0;

  return (length && strLength < length)

    ? (createPadding(length - strLength, chars) + string)

    : string;

}

module.exports = padStart;