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website/node_modules/firebase-functions/lib/apps.js

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+"use strict";
+// The MIT License (MIT)
+//
+// Copyright (c) 2017 Firebase
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+Object.defineProperty(exports, "__esModule", { value: true });
+const _ = require("lodash");
+const firebase = require("firebase-admin");
+const config_1 = require("./config");
+/** @internal */
+function apps() {
+    if (typeof apps.singleton === 'undefined') {
+        apps.init();
+    }
+    return apps.singleton;
+}
+exports.apps = apps;
+/** @internal */
+(function (apps) {
+    /** @internal */
+    apps.garbageCollectionInterval = 2 * 60 * 1000;
+    /** @internal */
+    function delay(delay) {
+        return new Promise(resolve => {
+            setTimeout(resolve, delay);
+        });
+    }
+    apps.delay = delay;
+    apps.init = () => (apps.singleton = new Apps());
+    /** @internal */
+    class Apps {
+        constructor() {
+            this._refCounter = {};
+        }
+        _appAlive(appName) {
+            try {
+                let app = firebase.app(appName);
+                return !_.get(app, 'isDeleted_');
+            }
+            catch (e) {
+                return false;
+            }
+        }
+        _destroyApp(appName) {
+            if (!this._appAlive(appName)) {
+                return;
+            }
+            firebase
+                .app(appName)
+                .delete()
+                .catch(_.noop);
+        }
+        retain() {
+            let increment = (n) => {
+                return (n || 0) + 1;
+            };
+            // Increment counter for admin because function might use event.data.ref
+            _.update(this._refCounter, '__admin__', increment);
+        }
+        release() {
+            let decrement = (n) => {
+                return n - 1;
+            };
+            return delay(apps.garbageCollectionInterval).then(() => {
+                _.update(this._refCounter, '__admin__', decrement);
+                _.forEach(this._refCounter, (count, key) => {
+                    if (count <= 0) {
+                        this._destroyApp(key);
+                    }
+                });
+            });
+        }
+        get admin() {
+            if (this._appAlive('__admin__')) {
+                return firebase.app('__admin__');
+            }
+            return firebase.initializeApp(this.firebaseArgs, '__admin__');
+        }
+        get firebaseArgs() {
+            return _.assign({}, config_1.firebaseConfig(), {
+                credential: firebase.credential.applicationDefault(),
+            });
+        }
+    }
+    apps.Apps = Apps;
+})(apps = exports.apps || (exports.apps = {}));