Flux.js

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/* 0 */
/***/ function(module, exports, __webpack_require__) {

	/**
	 * Copyright (c) 2014-2015, Facebook, Inc.
	 * All rights reserved.
	 *
	 * This source code is licensed under the BSD-style license found in the
	 * LICENSE file in the root directory of this source tree. An additional grant
	 * of patent rights can be found in the PATENTS file in the same directory.
	 */

	'use strict';

	module.exports.Dispatcher = __webpack_require__(1);

/***/ },
/* 1 */
/***/ function(module, exports, __webpack_require__) {

	/**
	 * Copyright (c) 2014-2015, Facebook, Inc.
	 * All rights reserved.
	 *
	 * This source code is licensed under the BSD-style license found in the
	 * LICENSE file in the root directory of this source tree. An additional grant
	 * of patent rights can be found in the PATENTS file in the same directory.
	 *
	 * @providesModule Dispatcher
	 * 
	 * @preventMunge
	 */

	'use strict';

	exports.__esModule = true;

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

	var invariant = __webpack_require__(2);

	var _prefix = 'ID_';

	/**
	 * Dispatcher is used to broadcast payloads to registered callbacks. This is
	 * different from generic pub-sub systems in two ways:
	 *
	 *   1) Callbacks are not subscribed to particular events. Every payload is
	 *      dispatched to every registered callback.
	 *   2) Callbacks can be deferred in whole or part until other callbacks have
	 *      been executed.
	 *
	 * For example, consider this hypothetical flight destination form, which
	 * selects a default city when a country is selected:
	 *
	 *   var flightDispatcher = new Dispatcher();
	 *
	 *   // Keeps track of which country is selected
	 *   var CountryStore = {country: null};
	 *
	 *   // Keeps track of which city is selected
	 *   var CityStore = {city: null};
	 *
	 *   // Keeps track of the base flight price of the selected city
	 *   var FlightPriceStore = {price: null}
	 *
	 * When a user changes the selected city, we dispatch the payload:
	 *
	 *   flightDispatcher.dispatch({
	 *     actionType: 'city-update',
	 *     selectedCity: 'paris'
	 *   });
	 *
	 * This payload is digested by `CityStore`:
	 *
	 *   flightDispatcher.register(function(payload) {
	 *     if (payload.actionType === 'city-update') {
	 *       CityStore.city = payload.selectedCity;
	 *     }
	 *   });
	 *
	 * When the user selects a country, we dispatch the payload:
	 *
	 *   flightDispatcher.dispatch({
	 *     actionType: 'country-update',
	 *     selectedCountry: 'australia'
	 *   });
	 *
	 * This payload is digested by both stores:
	 *
	 *   CountryStore.dispatchToken = flightDispatcher.register(function(payload) {
	 *     if (payload.actionType === 'country-update') {
	 *       CountryStore.country = payload.selectedCountry;
	 *     }
	 *   });
	 *
	 * When the callback to update `CountryStore` is registered, we save a reference
	 * to the returned token. Using this token with `waitFor()`, we can guarantee
	 * that `CountryStore` is updated before the callback that updates `CityStore`
	 * needs to query its data.
	 *
	 *   CityStore.dispatchToken = flightDispatcher.register(function(payload) {
	 *     if (payload.actionType === 'country-update') {
	 *       // `CountryStore.country` may not be updated.
	 *       flightDispatcher.waitFor([CountryStore.dispatchToken]);
	 *       // `CountryStore.country` is now guaranteed to be updated.
	 *
	 *       // Select the default city for the new country
	 *       CityStore.city = getDefaultCityForCountry(CountryStore.country);
	 *     }
	 *   });
	 *
	 * The usage of `waitFor()` can be chained, for example:
	 *
	 *   FlightPriceStore.dispatchToken =
	 *     flightDispatcher.register(function(payload) {
	 *       switch (payload.actionType) {
	 *         case 'country-update':
	 *         case 'city-update':
	 *           flightDispatcher.waitFor([CityStore.dispatchToken]);
	 *           FlightPriceStore.price =
	 *             getFlightPriceStore(CountryStore.country, CityStore.city);
	 *           break;
	 *     }
	 *   });
	 *
	 * The `country-update` payload will be guaranteed to invoke the stores'
	 * registered callbacks in order: `CountryStore`, `CityStore`, then
	 * `FlightPriceStore`.
	 */

	var Dispatcher = (function () {
	  function Dispatcher() {
	    _classCallCheck(this, Dispatcher);

	    this._callbacks = {};
	    this._isDispatching = false;
	    this._isHandled = {};
	    this._isPending = {};
	    this._lastID = 1;
	  }

	  /**
	   * Registers a callback to be invoked with every dispatched payload. Returns
	   * a token that can be used with `waitFor()`.
	   */

	  Dispatcher.prototype.register = function register(callback) {
	    var id = _prefix + this._lastID++;
	    this._callbacks[id] = callback;
	    return id;
	  };

	  /**
	   * Removes a callback based on its token.
	   */

	  Dispatcher.prototype.unregister = function unregister(id) {
	    !this._callbacks[id] ?  true ? invariant(false, 'Dispatcher.unregister(...): `%s` does not map to a registered callback.', id) : invariant(false) : undefined;
	    delete this._callbacks[id];
	  };

	  /**
	   * Waits for the callbacks specified to be invoked before continuing execution
	   * of the current callback. This method should only be used by a callback in
	   * response to a dispatched payload.
	   */

	  Dispatcher.prototype.waitFor = function waitFor(ids) {
	    !this._isDispatching ?  true ? invariant(false, 'Dispatcher.waitFor(...): Must be invoked while dispatching.') : invariant(false) : undefined;
	    for (var ii = 0; ii < ids.length; ii++) {
	      var id = ids[ii];
	      if (this._isPending[id]) {
	        !this._isHandled[id] ?  true ? invariant(false, 'Dispatcher.waitFor(...): Circular dependency detected while ' + 'waiting for `%s`.', id) : invariant(false) : undefined;
	        continue;
	      }
	      !this._callbacks[id] ?  true ? invariant(false, 'Dispatcher.waitFor(...): `%s` does not map to a registered callback.', id) : invariant(false) : undefined;
	      this._invokeCallback(id);
	    }
	  };

	  /**
	   * Dispatches a payload to all registered callbacks.
	   */

	  Dispatcher.prototype.dispatch = function dispatch(payload) {
	    !!this._isDispatching ?  true ? invariant(false, 'Dispatch.dispatch(...): Cannot dispatch in the middle of a dispatch.') : invariant(false) : undefined;
	    this._startDispatching(payload);
	    try {
	      for (var id in this._callbacks) {
	        if (this._isPending[id]) {
	          continue;
	        }
	        this._invokeCallback(id);
	      }
	    } finally {
	      this._stopDispatching();
	    }
	  };

	  /**
	   * Is this Dispatcher currently dispatching.
	   */

	  Dispatcher.prototype.isDispatching = function isDispatching() {
	    return this._isDispatching;
	  };

	  /**
	   * Call the callback stored with the given id. Also do some internal
	   * bookkeeping.
	   *
	   * @internal
	   */

	  Dispatcher.prototype._invokeCallback = function _invokeCallback(id) {
	    this._isPending[id] = true;
	    this._callbacks[id](this._pendingPayload);
	    this._isHandled[id] = true;
	  };

	  /**
	   * Set up bookkeeping needed when dispatching.
	   *
	   * @internal
	   */

	  Dispatcher.prototype._startDispatching = function _startDispatching(payload) {
	    for (var id in this._callbacks) {
	      this._isPending[id] = false;
	      this._isHandled[id] = false;
	    }
	    this._pendingPayload = payload;
	    this._isDispatching = true;
	  };

	  /**
	   * Clear bookkeeping used for dispatching.
	   *
	   * @internal
	   */

	  Dispatcher.prototype._stopDispatching = function _stopDispatching() {
	    delete this._pendingPayload;
	    this._isDispatching = false;
	  };

	  return Dispatcher;
	})();

	module.exports = Dispatcher;

/***/ },
/* 2 */
/***/ function(module, exports, __webpack_require__) {

	/**
	 * Copyright 2013-2015, Facebook, Inc.
	 * All rights reserved.
	 *
	 * This source code is licensed under the BSD-style license found in the
	 * LICENSE file in the root directory of this source tree. An additional grant
	 * of patent rights can be found in the PATENTS file in the same directory.
	 *
	 * @providesModule invariant
	 */

	"use strict";

	/**
	 * Use invariant() to assert state which your program assumes to be true.
	 *
	 * Provide sprintf-style format (only %s is supported) and arguments
	 * to provide information about what broke and what you were
	 * expecting.
	 *
	 * The invariant message will be stripped in production, but the invariant
	 * will remain to ensure logic does not differ in production.
	 */

	var invariant = function invariant(condition, format, a, b, c, d, e, f) {
	  if (true) {
	    if (format === undefined) {
	      throw new Error('invariant requires an error message argument');
	    }
	  }

	  if (!condition) {
	    var error;
	    if (format === undefined) {
	      error = new Error('Minified exception occurred; use the non-minified dev environment ' + 'for the full error message and additional helpful warnings.');
	    } else {
	      var args = [a, b, c, d, e, f];
	      var argIndex = 0;
	      error = new Error('Invariant Violation: ' + format.replace(/%s/g, function () {
	        return args[argIndex++];
	      }));
	    }

	    error.framesToPop = 1; // we don't care about invariant's own frame
	    throw error;
	  }
	};

	module.exports = invariant;

/***/ }
/******/ ])
});
;