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| /**
* Copyright 2017 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import {
FirebaseApp,
FirebaseOptions,
FirebaseNamespace
} from '@firebase/app-types';
import {
_FirebaseApp,
_FirebaseNamespace,
FirebaseService,
FirebaseServiceFactory,
FirebaseServiceNamespace,
AppHook
} from '@firebase/app-types/private';
import {
createSubscribe,
deepCopy,
deepExtend,
ErrorFactory,
FirebaseError,
Observer,
patchProperty,
Subscribe
} from '@firebase/util';
const contains = function(obj, key) {
return Object.prototype.hasOwnProperty.call(obj, key);
};
const DEFAULT_ENTRY_NAME = '[DEFAULT]';
// An array to capture listeners before the true auth functions
// exist
let tokenListeners = [];
/**
* Global context object for a collection of services using
* a shared authentication state.
*/
class FirebaseAppImpl implements FirebaseApp {
private options_: FirebaseOptions;
private name_: string;
private isDeleted_ = false;
private services_: {
[name: string]: {
[serviceName: string]: FirebaseService;
};
} = {};
public INTERNAL;
constructor(
options: FirebaseOptions,
name: string,
private firebase_: FirebaseNamespace
) {
this.name_ = name;
this.options_ = deepCopy<FirebaseOptions>(options);
this.INTERNAL = {
getUid: () => null,
getToken: () => Promise.resolve(null),
addAuthTokenListener: (callback: (token: string | null) => void) => {
tokenListeners.push(callback);
// Make sure callback is called, asynchronously, in the absence of the auth module
setTimeout(() => callback(null), 0);
},
removeAuthTokenListener: callback => {
tokenListeners = tokenListeners.filter(
listener => listener !== callback
);
}
};
}
get name(): string {
this.checkDestroyed_();
return this.name_;
}
get options(): FirebaseOptions {
this.checkDestroyed_();
return this.options_;
}
delete(): Promise<void> {
return new Promise(resolve => {
this.checkDestroyed_();
resolve();
})
.then(() => {
(this.firebase_ as _FirebaseNamespace).INTERNAL.removeApp(this.name_);
let services: FirebaseService[] = [];
Object.keys(this.services_).forEach(serviceKey => {
Object.keys(this.services_[serviceKey]).forEach(instanceKey => {
services.push(this.services_[serviceKey][instanceKey]);
});
});
return Promise.all(
services.map(service => {
return service.INTERNAL!.delete();
})
);
})
.then((): void => {
this.isDeleted_ = true;
this.services_ = {};
});
}
/**
* Return a service instance associated with this app (creating it
* on demand), identified by the passed instanceIdentifier.
*
* NOTE: Currently storage is the only one that is leveraging this
* functionality. They invoke it by calling:
*
* ```javascript
* firebase.app().storage('STORAGE BUCKET ID')
* ```
*
* The service name is passed to this already
* @internal
*/
_getService(
name: string,
instanceIdentifier: string = DEFAULT_ENTRY_NAME
): FirebaseService {
this.checkDestroyed_();
if (!this.services_[name]) {
this.services_[name] = {};
}
if (!this.services_[name][instanceIdentifier]) {
/**
* If a custom instance has been defined (i.e. not '[DEFAULT]')
* then we will pass that instance on, otherwise we pass `null`
*/
const instanceSpecifier =
instanceIdentifier !== DEFAULT_ENTRY_NAME
? instanceIdentifier
: undefined;
const service = (this.firebase_ as _FirebaseNamespace).INTERNAL.factories[
name
](this, this.extendApp.bind(this), instanceSpecifier);
this.services_[name][instanceIdentifier] = service;
}
return this.services_[name][instanceIdentifier];
}
/**
* Callback function used to extend an App instance at the time
* of service instance creation.
*/
private extendApp(props: { [name: string]: any }): void {
// Copy the object onto the FirebaseAppImpl prototype
deepExtend(this, props);
/**
* If the app has overwritten the addAuthTokenListener stub, forward
* the active token listeners on to the true fxn.
*
* TODO: This function is required due to our current module
* structure. Once we are able to rely strictly upon a single module
* implementation, this code should be refactored and Auth should
* provide these stubs and the upgrade logic
*/
Iif (props.INTERNAL && props.INTERNAL.addAuthTokenListener) {
tokenListeners.forEach(listener => {
this.INTERNAL.addAuthTokenListener(listener);
});
tokenListeners = [];
}
}
/**
* This function will throw an Error if the App has already been deleted -
* use before performing API actions on the App.
*/
private checkDestroyed_(): void {
if (this.isDeleted_) {
error('app-deleted', { name: this.name_ });
}
}
}
// Prevent dead-code elimination of these methods w/o invalid property
// copying.
(FirebaseAppImpl.prototype.name && FirebaseAppImpl.prototype.options) ||
FirebaseAppImpl.prototype.delete ||
console.log('dc');
/**
* Return a firebase namespace object.
*
* In production, this will be called exactly once and the result
* assigned to the 'firebase' global. It may be called multiple times
* in unit tests.
*/
export function createFirebaseNamespace(): FirebaseNamespace {
let apps_: { [name: string]: FirebaseApp } = {};
let factories: { [service: string]: FirebaseServiceFactory } = {};
let appHooks: { [service: string]: AppHook } = {};
// A namespace is a plain JavaScript Object.
let namespace = {
// Hack to prevent Babel from modifying the object returned
// as the firebase namespace.
__esModule: true,
initializeApp: initializeApp,
app: app as any,
apps: null as any,
Promise: Promise,
SDK_VERSION: '${JSCORE_VERSION}',
INTERNAL: {
registerService: registerService,
createFirebaseNamespace: createFirebaseNamespace,
extendNamespace: extendNamespace,
createSubscribe: createSubscribe,
ErrorFactory: ErrorFactory,
removeApp: removeApp,
factories: factories,
useAsService: useAsService,
Promise: Promise,
deepExtend: deepExtend
}
};
// Inject a circular default export to allow Babel users who were previously
// using:
//
// import firebase from 'firebase';
// which becomes: var firebase = require('firebase').default;
//
// instead of
//
// import * as firebase from 'firebase';
// which becomes: var firebase = require('firebase');
patchProperty(namespace, 'default', namespace);
// firebase.apps is a read-only getter.
Object.defineProperty(namespace, 'apps', {
get: getApps
});
/**
* Called by App.delete() - but before any services associated with the App
* are deleted.
*/
function removeApp(name: string): void {
let app = apps_[name];
callAppHooks(app, 'delete');
delete apps_[name];
}
/**
* Get the App object for a given name (or DEFAULT).
*/
function app(name?: string): FirebaseApp {
name = name || DEFAULT_ENTRY_NAME;
if (!contains(apps_, name)) {
error('no-app', { name: name });
}
return apps_[name];
}
patchProperty(app, 'App', FirebaseAppImpl);
/**
* Create a new App instance (name must be unique).
*/
function initializeApp(options: FirebaseOptions, name?: string): FirebaseApp {
if (name === undefined) {
name = DEFAULT_ENTRY_NAME;
} else {
if (typeof name !== 'string' || name === '') {
error('bad-app-name', { name: name + '' });
}
}
if (contains(apps_, name)) {
error('duplicate-app', { name: name });
}
let app = new FirebaseAppImpl(
options,
name!,
namespace as FirebaseNamespace
);
apps_[name!] = app;
callAppHooks(app, 'create');
return app;
}
/*
* Return an array of all the non-deleted FirebaseApps.
*/
function getApps(): FirebaseApp[] {
// Make a copy so caller cannot mutate the apps list.
return Object.keys(apps_).map(name => apps_[name]);
}
/*
* Register a Firebase Service.
*
* firebase.INTERNAL.registerService()
*
* TODO: Implement serviceProperties.
*/
function registerService(
name: string,
createService: FirebaseServiceFactory,
serviceProperties?: { [prop: string]: any },
appHook?: AppHook,
allowMultipleInstances?: boolean
): FirebaseServiceNamespace<FirebaseService> {
// Cannot re-register a service that already exists
Iif (factories[name]) {
error('duplicate-service', { name: name });
}
// Capture the service factory for later service instantiation
factories[name] = createService;
// Capture the appHook, if passed
if (appHook) {
appHooks[name] = appHook;
// Run the **new** app hook on all existing apps
getApps().forEach(app => {
appHook('create', app);
});
}
// The Service namespace is an accessor function ...
const serviceNamespace = (appArg: FirebaseApp = app()) => {
Iif (typeof (appArg as any)[name] !== 'function') {
// Invalid argument.
// This happens in the following case: firebase.storage('gs:/')
error('invalid-app-argument', { name: name });
}
// Forward service instance lookup to the FirebaseApp.
return (appArg as any)[name]();
};
// ... and a container for service-level properties.
if (serviceProperties !== undefined) {
deepExtend(serviceNamespace, serviceProperties);
}
// Monkey-patch the serviceNamespace onto the firebase namespace
(namespace as any)[name] = serviceNamespace;
// Patch the FirebaseAppImpl prototype
FirebaseAppImpl.prototype[name] = function(...args) {
const serviceFxn = this._getService.bind(this, name);
return serviceFxn.apply(this, allowMultipleInstances ? args : []);
};
return serviceNamespace;
}
/**
* Patch the top-level firebase namespace with additional properties.
*
* firebase.INTERNAL.extendNamespace()
*/
function extendNamespace(props: { [prop: string]: any }): void {
deepExtend(namespace, props);
}
function callAppHooks(app: FirebaseApp, eventName: string) {
Object.keys(factories).forEach(serviceName => {
// Ignore virtual services
let factoryName = useAsService(app, serviceName);
Iif (factoryName === null) {
return;
}
if (appHooks[factoryName]) {
appHooks[factoryName](eventName, app);
}
});
}
// Map the requested service to a registered service name
// (used to map auth to serverAuth service when needed).
function useAsService(app: FirebaseApp, name: string): string | null {
Iif (name === 'serverAuth') {
return null;
}
let useService = name;
let options = app.options;
return useService;
}
return (namespace as any) as FirebaseNamespace;
}
type AppError =
| 'no-app'
| 'bad-app-name'
| 'duplicate-app'
| 'app-deleted'
| 'duplicate-service'
| 'sa-not-supported'
| 'invalid-app-argument';
function error(code: AppError, args?: { [name: string]: any }) {
throw appErrors.create(code, args);
}
// TypeScript does not support non-string indexes!
// let errors: {[code: AppError: string} = {
let errors: { [code: string]: string } = {
'no-app':
"No Firebase App '{$name}' has been created - " +
'call Firebase App.initializeApp()',
'bad-app-name': "Illegal App name: '{$name}",
'duplicate-app': "Firebase App named '{$name}' already exists",
'app-deleted': "Firebase App named '{$name}' already deleted",
'duplicate-service': "Firebase service named '{$name}' already registered",
'sa-not-supported':
'Initializing the Firebase SDK with a service ' +
'account is only allowed in a Node.js environment. On client ' +
'devices, you should instead initialize the SDK with an api key and ' +
'auth domain',
'invalid-app-argument':
'firebase.{$name}() takes either no argument or a ' +
'Firebase App instance.'
};
let appErrors = new ErrorFactory<AppError>('app', 'Firebase', errors);
|