deep-iterator/lib/tag.js

Deep iteration of any object or iterable collection.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _create = require('babel-runtime/core-js/object/create');

var _create2 = _interopRequireDefault(_create);

var _iterator = require('babel-runtime/core-js/symbol/iterator');

var _iterator2 = _interopRequireDefault(_iterator);

exports.getTypeFromTag = getTypeFromTag;
exports.getTag = getTag;
exports.getTagMap = getTagMap;

var _generators = require('./generators');

var gen = _interopRequireWildcard(_generators);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var TYPE_POSITION_IN_TAG = 8;

var tagMap = {
  '[object Null]': gen.LEAF,
  '[object Undefined]': gen.LEAF,
  '[object Boolean]': gen.LEAF,
  '[object Number]': gen.LEAF,
  '[object String]': gen.LEAF, // strings are excluded although they are iterable
  '[object Symbol]': gen.LEAF,
  '[object Date]': gen.LEAF,
  '[object RegExp]': gen.LEAF,
  '[object Function]': gen.LEAF,
  '[object GeneratorFunction]': gen.LEAF,
  '[object Promise]': gen.LEAF,
  '[object Array]': gen.arrayIterator,
  '[object Set]': gen.genericIterator,
  '[object Map]': gen.mapIterator,
  '[object UserDefinedIterable]': gen.genericIterator,
  '[object NonIterableObject]': gen.objectIterator
};

function getTypeFromTag(tag) {
  return tag.slice(TYPE_POSITION_IN_TAG, tag.length - 1);
}

function getTag(element) {
  var stringTag = Object.prototype.toString.call(element);
  if (stringTag in tagMap) {
    return stringTag;
  }
  if (typeof element[_iterator2.default] === 'function') {
    return '[object UserDefinedIterable]';
  }
  return '[object NonIterableObject]';
}

function getTagMap(config) {
  var myTagMap = (0, _create2.default)(tagMap);
  if (!config.iterateOverObject) {
    myTagMap['[object NonIterableObject]'] = gen.LEAF;
  }
  return myTagMap;
}
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