1 files changed, 59 insertions, 0 deletions
diff --git a/node_modules/fbjs/lib/PromiseMap.js b/node_modules/fbjs/lib/PromiseMap.js
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+++ b/node_modules/fbjs/lib/PromiseMap.js
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+/**
+ * Copyright (c) 2013-present, 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';
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+var Deferred = require('./Deferred');
+
+var invariant = require('./invariant');
+
+/**
+ * A map of asynchronous values that can be get or set in any order. Unlike a
+ * normal map, setting the value for a particular key more than once throws.
+ * Also unlike a normal map, a key can either be resolved or rejected.
+ */
+
+var PromiseMap = function () {
+  function PromiseMap() {
+    _classCallCheck(this, PromiseMap);
+
+    this._deferred = {};
+  }
+
+  PromiseMap.prototype.get = function get(key) {
+    return getDeferred(this._deferred, key).getPromise();
+  };
+
+  PromiseMap.prototype.resolveKey = function resolveKey(key, value) {
+    var entry = getDeferred(this._deferred, key);
+    !!entry.isSettled() ? process.env.NODE_ENV !== 'production' ? invariant(false, 'PromiseMap: Already settled `%s`.', key) : invariant(false) : void 0;
+    entry.resolve(value);
+  };
+
+  PromiseMap.prototype.rejectKey = function rejectKey(key, reason) {
+    var entry = getDeferred(this._deferred, key);
+    !!entry.isSettled() ? process.env.NODE_ENV !== 'production' ? invariant(false, 'PromiseMap: Already settled `%s`.', key) : invariant(false) : void 0;
+    entry.reject(reason);
+  };
+
+  return PromiseMap;
+}();
+
+function getDeferred(entries, key) {
+  if (!entries.hasOwnProperty(key)) {
+    entries[key] = new Deferred();
+  }
+  return entries[key];
+}
+
+module.exports = PromiseMap;
+\ No newline at end of file