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'use strict';

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

module.exports = function duplicates() {
  var _this = this;

  var occuredValues = [];
  var duplicateValues = {};

  var stringifiedValue = function stringifiedValue(value) {
    if (Array.isArray(value) || (typeof value === 'undefined' ? 'undefined' : _typeof(value)) === 'object') {
      return JSON.stringify(value);
    }

    return value;
  };

  if (Array.isArray(this.items)) {
    this.items.forEach(function (value, index) {
      var valueAsString = stringifiedValue(value);

      if (occuredValues.indexOf(valueAsString) === -1) {
        occuredValues.push(valueAsString);
      } else {
        duplicateValues[index] = value;
      }
    });
  } else if (_typeof(this.items) === 'object') {
    Object.keys(this.items).forEach(function (key) {
      var valueAsString = stringifiedValue(_this.items[key]);

      if (occuredValues.indexOf(valueAsString) === -1) {
        occuredValues.push(valueAsString);
      } else {
        duplicateValues[key] = _this.items[key];
      }
    });
  }

  return new this.constructor(duplicateValues);
};