react-feature-toggle/lib/toggle-component/index.js

A simple solution for implementing feature toggles in react

'use strict';

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

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _get = function get(object, property, receiver) { if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { return get(parent, property, receiver); } } else if ("value" in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } };

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

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

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var ToggleComponent = function ToggleComponent(def) {
  for (var _len = arguments.length, toggled = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
    toggled[_key - 1] = arguments[_key];
  }

  return function (_Component) {
    _inherits(ToggleComponent, _Component);

    function ToggleComponent() {
      var _Object$getPrototypeO;

      _classCallCheck(this, ToggleComponent);

      for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
        args[_key2] = arguments[_key2];
      }

      var _this = _possibleConstructorReturn(this, (_Object$getPrototypeO = Object.getPrototypeOf(ToggleComponent)).call.apply(_Object$getPrototypeO, [this].concat(args)));

      _this._toggles = _this.context.toggles || {};
      return _this;
    }

    _createClass(ToggleComponent, [{
      key: 'getChildContext',
      value: function getChildContext() {
        return _get(Object.getPrototypeOf(ToggleComponent.prototype), 'getChildContext', this) && _get(Object.getPrototypeOf(ToggleComponent.prototype), 'getChildContext', this).call(this) || { toggles: {} };
      }
    }, {
      key: 'render',
      value: function render() {
        var _this2 = this;

        var Toggle = toggled.reduce(function (actual, t) {
          return Object.keys(_this2._toggles).find(function (k) {
            return k === t.displayName;
          }) ? t : actual;
        }, def);

        var props = Object.assign({}, this.props, this._toggles[Toggle.displayName] && this._toggles[Toggle.displayName].props);
        return _react2.default.createElement(Toggle, props);
      }
    }], [{
      key: 'childContextTypes',
      get: function get() {
        return Object.assign({}, _get(Object.getPrototypeOf(ToggleComponent), 'childContextTypes', this), {
          toggles: _react.PropTypes.object
        });
      }
    }, {
      key: 'contextTypes',
      get: function get() {
        return {
          toggles: _react.PropTypes.object
        };
      }
    }]);

    return ToggleComponent;
  }(_react.Component);
};

// Pollyfill
if (!Array.prototype.find) {
  Array.prototype.find = function (predicate) {
    if (this === null) {
      throw new TypeError('Array.prototype.find called on null or undefined');
    }
    if (typeof predicate !== 'function') {
      throw new TypeError('predicate must be a function');
    }
    var list = Object(this);
    var length = list.length >>> 0;
    var thisArg = arguments[1];
    var value;

    for (var i = 0; i < length; i++) {
      value = list[i];
      if (predicate.call(thisArg, value, i, list)) {
        return value;
      }
    }
    return undefined;
  };
}

exports.ToggleComponent = ToggleComponent;