subscribe.js

'use strict';

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

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

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; }; }();

exports.default = subscribe;

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _shallowequal = require('shallowequal');

var _shallowequal2 = _interopRequireDefault(_shallowequal);

var _hoistNonReactStatics = require('hoist-non-react-statics');

var _hoistNonReactStatics2 = _interopRequireDefault(_hoistNonReactStatics);

var _PropTypes = require('./PropTypes');

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; }

function getDisplayName(WrappedComponent) {
  return WrappedComponent.displayName || WrappedComponent.name || 'Component';
}

var defaultMapStateToProps = function defaultMapStateToProps() {
  return {};
};

function subscribe() {
  var mapStateToProps = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : defaultMapStateToProps;

  return function wrapWithConnect(WrappedComponent) {
    var Connect = function (_Component) {
      _inherits(Connect, _Component);

      function Connect(props, context) {
        _classCallCheck(this, Connect);

        var _this = _possibleConstructorReturn(this, (Connect.__proto__ || Object.getPrototypeOf(Connect)).call(this, props, context));

        _this.handleChange = function () {
          if (!_this.unsubscribe) {
            return;
          }

          var nextState = mapStateToProps(_this.store.getState());
          if (!(0, _shallowequal2.default)(_this.state.subscribed, nextState)) {
            _this.setState({ subscribed: nextState });
          }
        };

        _this.store = context.store;
        _this.state = { subscribed: mapStateToProps(_this.store.getState()) };
        return _this;
      }

      _createClass(Connect, [{
        key: 'componentDidMount',
        value: function componentDidMount() {
          this.trySubscribe();
        }
      }, {
        key: 'componentWillUnmount',
        value: function componentWillUnmount() {
          this.tryUnsubscribe();
        }
      }, {
        key: 'trySubscribe',
        value: function trySubscribe() {
          this.unsubscribe = this.store.subscribe(this.handleChange);
          this.handleChange();
        }
      }, {
        key: 'tryUnsubscribe',
        value: function tryUnsubscribe() {
          if (this.unsubscribe) {
            this.unsubscribe();
            this.unsubscribe = null;
          }
        }
      }, {
        key: 'render',
        value: function render() {
          return _react2.default.createElement(WrappedComponent, _extends({}, this.state.subscribed, { store: this.store }));
        }
      }]);

      return Connect;
    }(_react.Component);

    Connect.displayName = 'Subscribe(' + getDisplayName(WrappedComponent) + ')';
    Connect.contextTypes = {
      store: _PropTypes.storeShape.isRequired
    };


    return (0, _hoistNonReactStatics2.default)(Connect, WrappedComponent);
  };
}