Extract uuid function into @firebase/util (#6363)

Removed duplicate uuid function and extracted into `@firebase/util`

.changeset/tame-rice-peel.md

@@ -0,0 +1,7 @@
+---
+"@firebase/app-check": patch
+"@firebase/database": patch
+"@firebase/util": patch
+---
+
+Extract uuid function into @firebase/util

common/api-review/util.api.md

@@ -422,6 +422,9 @@ export interface Subscribe<T> {
 // @public (undocumented)
 export type Unsubscribe = () => void;
 
+// @public
+export const uuidv4: () => string;
+
 // Warning: (ae-missing-release-tag) "validateArgCount" is exported by the package, but it is missing a release tag (@alpha, @beta, @public, or @internal)
 //
 // @public

packages/app-check/src/storage.ts

@@ -15,9 +15,8 @@
  * limitations under the License.
  */
 
-import { uuidv4 } from './util';
 import { FirebaseApp } from '@firebase/app';
-import { isIndexedDBAvailable } from '@firebase/util';
+import { isIndexedDBAvailable, uuidv4 } from '@firebase/util';
 import {
   readDebugTokenFromIndexedDB,
   readTokenFromIndexedDB,

packages/app-check/src/util.ts

@@ -37,17 +37,6 @@ export function ensureActivated(app: FirebaseApp): void {
   }
 }
 
-/**
- * Copied from https://stackoverflow.com/a/2117523
- */
-export function uuidv4(): string {
-  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, c => {
-    const r = (Math.random() * 16) | 0,
-      v = c === 'x' ? r : (r & 0x3) | 0x8;
-    return v.toString(16);
-  });
-}
-
 export function getDurationString(durationInMillis: number): string {
   const totalSeconds = Math.round(durationInMillis / 1000);
   const days = Math.floor(totalSeconds / (3600 * 24));

packages/database/test/helpers/util.ts

@@ -15,6 +15,8 @@
  * limitations under the License.
  */
 
+import { uuidv4 } from '@firebase/util';
+
 import { Database, ref } from '../../src';
 import { ConnectionTarget } from '../../src/api/test_access';
 
@@ -78,18 +80,6 @@ export function waitFor(waitTimeInMS: number) {
   return new Promise(resolve => setTimeout(resolve, waitTimeInMS));
 }
 
-/**
- * Copied from https://stackoverflow.com/a/2117523
- * TODO: extract this into @firebase/util
- */
-export function uuidv4(): string {
-  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, c => {
-    const r = (Math.random() * 16) | 0,
-      v = c === 'x' ? r : (r & 0x3) | 0x8;
-    return v.toString(16);
-  });
-}
-
 // Creates a unique reference using uuid
 export function getUniqueRef(db: Database) {
   const path = uuidv4();

packages/util/index.node.ts

@@ -36,6 +36,7 @@ export * from './src/sha1';
 export * from './src/subscribe';
 export * from './src/validation';
 export * from './src/utf8';
+export * from './src/uuid';
 export * from './src/exponential_backoff';
 export * from './src/formatters';
 export * from './src/compat';

packages/util/index.ts

@@ -31,6 +31,7 @@ export * from './src/sha1';
 export * from './src/subscribe';
 export * from './src/validation';
 export * from './src/utf8';
+export * from './src/uuid';
 export * from './src/exponential_backoff';
 export * from './src/formatters';
 export * from './src/compat';

packages/util/src/uuid.ts

@@ -0,0 +1,29 @@
+/**
+ * @license
+ * Copyright 2022 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.
+ */
+
+/**
+ * Copied from https://stackoverflow.com/a/2117523
+ * Generates a new uuid.
+ * @public
+ */
+export const uuidv4 = function (): string {
+  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, c => {
+    const r = (Math.random() * 16) | 0,
+      v = c === 'x' ? r : (r & 0x3) | 0x8;
+    return v.toString(16);
+  });
+};