text: 'use strict';
  
  Object.defineProperty(exports, '__esModule', {
    value: true
  });
  
  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
  
  var _rule = require('../rule/');
  
  var _rule2 = _interopRequireDefault(_rule);
  
  var _util = require('../util');
  
  var _util2 = _interopRequireDefault(_util);
  
  /**
   *  Validates a regular expression pattern.
   *
   *  Performs validation when a rule only contains
   *  a pattern property but is not declared as a string type.
   *
   *  @param rule The validation rule.
   *  @param value The value of the field on the source object.
   *  @param callback The callback function.
   *  @param source The source object being validated.
   *  @param options The validation options.
   *  @param options.messages The validation messages.
   */
  function pattern(rule, value, callback, source, options) {
    var errors = [];
    var validate = rule.required || !rule.required && source.hasOwnProperty(rule.field);
    if (validate) {
      if (_util2['default'].isEmptyValue(value, 'string') && !rule.required) {
        return callback();
      }
      _rule2['default'].required(rule, value, source, errors, options);
      if (!_util2['default'].isEmptyValue(value, 'string')) {
        _rule2['default'].pattern(rule, value, source, errors, options);
      }
    }
    callback(errors);
  }
  
  exports['default'] = pattern;
  module.exports = exports['default'];