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509bba0_unpacked_with_node_modules/~/flux/index.js

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+/**
+ * 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.
+ */
+
+module.exports.Dispatcher = require('./lib/Dispatcher');
+
+
+
+//////////////////
+// WEBPACK FOOTER
+// ./~/flux/index.js
+// module id = 690
+// module chunks = 4

509bba0_unpacked_with_node_modules/~/flux/lib/Dispatcher.js

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+/**
+ * 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 = require('fbjs/lib/invariant');
+
+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] ? process.env.NODE_ENV !== 'production' ? 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 ? process.env.NODE_ENV !== 'production' ? 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] ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Dispatcher.waitFor(...): Circular dependency detected while ' + 'waiting for `%s`.', id) : invariant(false) : undefined;
+        continue;
+      }
+      !this._callbacks[id] ? process.env.NODE_ENV !== 'production' ? 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 ? process.env.NODE_ENV !== 'production' ? 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;
+
+
+//////////////////
+// WEBPACK FOOTER
+// ./~/flux/lib/Dispatcher.js
+// module id = 2361
+// module chunks = 4