Included initStandalone (#7258)

Added private `initStandalone` API into modular SDK

Author: maneesht

.changeset/pretty-donkeys-brush.md

@@ -0,0 +1,6 @@
+---
+"@firebase/database-compat": patch
+"@firebase/database": patch
+---
+
+Included `initStandalone` as an internal method to RTDB.

packages/database-compat/src/api/internal.ts

@@ -14,7 +14,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
+import {
+  AppCheckInternalComponentName,
+  FirebaseAppCheckInternal
+} from '@firebase/app-check-interop-types';
 import { FirebaseApp } from '@firebase/app-types';
 import {
   FirebaseAuthInternal,
@@ -48,13 +51,15 @@ export function initStandalone<T>({
   url,
   version,
   customAuthImpl,
+  customAppCheckImpl,
   namespace,
   nodeAdmin = false
 }: {
   app: FirebaseApp;
   url: string;
   version: string;
   customAuthImpl: FirebaseAuthInternal;
+  customAppCheckImpl?: FirebaseAppCheckInternal;
   namespace: T;
   nodeAdmin?: boolean;
 }): {
@@ -63,24 +68,40 @@ export function initStandalone<T>({
 } {
   _setSDKVersion(version);
 
+  const container = new ComponentContainer('database-standalone');
   /**
    * ComponentContainer('database-standalone') is just a placeholder that doesn't perform
    * any actual function.
    */
   const authProvider = new Provider<FirebaseAuthInternalName>(
     'auth-internal',
-    new ComponentContainer('database-standalone')
+    container
   );
   authProvider.setComponent(
     new Component('auth-internal', () => customAuthImpl, ComponentType.PRIVATE)
   );
 
+  let appCheckProvider: Provider<AppCheckInternalComponentName> = undefined;
+  if (customAppCheckImpl) {
+    appCheckProvider = new Provider<AppCheckInternalComponentName>(
+      'app-check-internal',
+      container
+    );
+    appCheckProvider.setComponent(
+      new Component(
+        'app-check-internal',
+        () => customAppCheckImpl,
+        ComponentType.PRIVATE
+      )
+    );
+  }
+
   return {
     instance: new Database(
       _repoManagerDatabaseFromApp(
         app,
         authProvider,
-        /* appCheckProvider= */ undefined,
+        appCheckProvider,
         url,
         nodeAdmin
       ),

packages/database/src/api.standalone.ts

@@ -96,4 +96,5 @@ export {
   hijackHash as _TEST_ACCESS_hijackHash,
   forceRestClient as _TEST_ACCESS_forceRestClient
 } from './api/test_access';
+export * from './internal/index';
 /* eslint-enable camelcase */

packages/database/src/internal/index.ts

@@ -0,0 +1,99 @@
+/**
+ * @license
+ * Copyright 2023 Google LLC
+ *
+ * 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 {
+  FirebaseAppCheckInternal,
+  AppCheckInternalComponentName
+} from '@firebase/app-check-interop-types';
+import { FirebaseApp } from '@firebase/app-types';
+import {
+  FirebaseAuthInternal,
+  FirebaseAuthInternalName
+} from '@firebase/auth-interop-types';
+import {
+  Component,
+  ComponentContainer,
+  ComponentType,
+  Provider
+} from '@firebase/component';
+
+import { Database } from '../api.standalone';
+import { repoManagerDatabaseFromApp } from '../api/Database';
+import { setSDKVersion } from '../core/version';
+
+/**
+ * Used by console to create a database based on the app,
+ * passed database URL and a custom auth implementation.
+ * @internal
+ * @param app - A valid FirebaseApp-like object
+ * @param url - A valid Firebase databaseURL
+ * @param version - custom version e.g. firebase-admin version
+ * @param customAppCheckImpl - custom app check implementation
+ * @param customAuthImpl - custom auth implementation
+ */
+export function _initStandalone({
+  app,
+  url,
+  version,
+  customAuthImpl,
+  customAppCheckImpl,
+  nodeAdmin = false
+}: {
+  app: FirebaseApp;
+  url: string;
+  version: string;
+  customAuthImpl: FirebaseAuthInternal;
+  customAppCheckImpl?: FirebaseAppCheckInternal;
+  nodeAdmin?: boolean;
+}): Database {
+  setSDKVersion(version);
+
+  /**
+   * ComponentContainer('database-standalone') is just a placeholder that doesn't perform
+   * any actual function.
+   */
+  const componentContainer = new ComponentContainer('database-standalone');
+  const authProvider = new Provider<FirebaseAuthInternalName>(
+    'auth-internal',
+    componentContainer
+  );
+  let appCheckProvider: Provider<AppCheckInternalComponentName>;
+  if (customAppCheckImpl) {
+    appCheckProvider = new Provider<AppCheckInternalComponentName>(
+      'app-check-internal',
+      componentContainer
+    );
+    appCheckProvider.setComponent(
+      new Component(
+        'app-check-internal',
+        () => customAppCheckImpl,
+        ComponentType.PRIVATE
+      )
+    );
+  }
+  authProvider.setComponent(
+    new Component('auth-internal', () => customAuthImpl, ComponentType.PRIVATE)
+  );
+
+  return repoManagerDatabaseFromApp(
+    app,
+    authProvider,
+    appCheckProvider,
+    url,
+    nodeAdmin
+  );
+}