parse-js/dist/transformers/group.js

Utility library for object structure conversion.

'use strict';

var _each = require('lodash/each');

var _transform = require('../lib/transform');

var _isPlainObject = require('lodash/isPlainObject');

function GroupTransformer(regex, key, index) {
  if (!(this instanceof GroupTransformer)) {
    return this.transform(new GroupTransformer(regex, key, index));
  }

  this._regex = regex;
  this._key = key;
  this._index = index;
}

GroupTransformer.prototype.match = function (key) {
  this._regex.lastIndex = 0;
  return this._regex.exec(key);
};

GroupTransformer.prototype.parse = function (source) {
  var _this = this;

  return _transform(source, function (result, value, key) {
    var match = _this.match(key);

    if (!match) {
      result[key] = value;
      return;
    }

    var newKey = match[_this._key];
    var index = match[_this._index];
    if (!result[newKey]) result[newKey] = {};
    result[newKey][index] = value;
  }, {});
};

GroupTransformer.prototype.reverse = function (source) {
  return _transform(source, function (result, value, key) {
    if (!_isPlainObject(value)) {
      result[key] = value;
      return;
    }

    _each(value, function (v, idx) {
      result[key + idx] = v;
    });
  });
};

module.exports = GroupTransformer;