"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _react = _interopRequireDefault(require("react"));

var _propTypes = _interopRequireDefault(require("prop-types"));

var _invariant = _interopRequireDefault(require("invariant"));

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

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

function createBroadcast(initialValue) {
  let currentValue = initialValue;
  let subscribers = [];

  const getValue = () => currentValue;

  const publish = state => {
    currentValue = state;
    subscribers.forEach(s => s(currentValue));
  };

  const subscribe = subscriber => {
    subscribers.push(subscriber);
    return () => {
      subscribers = subscribers.filter(s => s !== subscriber);
    };
  };

  return {
    getValue,
    publish,
    subscribe
  };
}
/**
 * A <Broadcast> provides a generic way for descendants to "subscribe"
 * to some value that changes over time, bypassing any intermediate
 * shouldComponentUpdate's in the hierarchy. It puts all subscription
 * functions on context.broadcasts, keyed by "channel".
 *
 * To use it, a subscriber must opt-in to context.broadcasts. See the
 * <Subscriber> component for a reference implementation.
 */


class Broadcast extends _react.default.Component {
  constructor(...args) {
    var _temp;

    return _temp = super(...args), Object.defineProperty(this, "broadcast", {
      configurable: true,
      enumerable: true,
      writable: true,
      value: createBroadcast(this.props.value)
    }), _temp;
  }

  getChildContext() {
    return {
      broadcasts: _objectSpread({}, this.context.broadcasts, {
        [this.props.channel]: this.broadcast
      })
    };
  }

  componentWillReceiveProps(nextProps) {
    (0, _invariant.default)(this.props.channel === nextProps.channel, "You cannot change <Broadcast channel>");

    if (!this.props.compareValues(this.props.value, nextProps.value)) {
      this.broadcast.publish(nextProps.value);
    }
  }

  render() {
    return _react.default.Children.only(this.props.children);
  }

}

Object.defineProperty(Broadcast, "propTypes", {
  configurable: true,
  enumerable: true,
  writable: true,
  value: {
    channel: _propTypes.default.string.isRequired,
    children: _propTypes.default.node.isRequired,
    compareValues: _propTypes.default.func,
    value: _propTypes.default.any
  }
});
Object.defineProperty(Broadcast, "defaultProps", {
  configurable: true,
  enumerable: true,
  writable: true,
  value: {
    compareValues: (prevValue, nextValue) => prevValue === nextValue
  }
});
Object.defineProperty(Broadcast, "contextTypes", {
  configurable: true,
  enumerable: true,
  writable: true,
  value: {
    broadcasts: _propTypes.default.object
  }
});
Object.defineProperty(Broadcast, "childContextTypes", {
  configurable: true,
  enumerable: true,
  writable: true,
  value: {
    broadcasts: _propTypes.default.object.isRequired
  }
});
var _default = Broadcast;
exports.default = _default;