feat(auth): Add Expo support for phone auth

docs/auth/phone-auth.md

@@ -29,6 +29,22 @@ For reliable automated testing, you may want to disable both automatic and fallb
 
 Ensure that all parts of step 1 and 2 from [the official firebase Android phone auth docs](https://firebase.google.com/docs/auth/android/phone-auth#enable-phone-number-sign-in-for-your-firebase-project) have been followed.
 
+# Expo Setup
+
+To use phone auth in an expo app, add the `@react-native-firebase/auth` config plug-in to the [`plugins`](https://docs.expo.io/versions/latest/config/app/#plugins) section of your `app.json`. This is in addition to the `@react-native-firebase/app` plugin.
+
+```json
+{
+  "expo": {
+    "plugins": ["@react-native-firebase/app", "@react-native-firebase/auth"]
+  }
+}
+```
+
+The `@react-native-firebase/auth` config plugin is not required for all auth providers, but it is required to use phone auth. The plugin [will set up reCAPTCHA](https://firebase.google.com/docs/auth/ios/phone-auth#set-up-recaptcha-verification) verification for you on iOS.
+
+The recommendation is to use a [custom development client](https://docs.expo.dev/clients/getting-started/). For more info on using Expo with React Native Firebase, see our [Expo docs](/#expo).
+
 # Sign-in
 
 The module provides a `signInWithPhoneNumber` method which accepts a phone number. Firebase sends an SMS message to the

packages/auth/app.plugin.js

@@ -0,0 +1 @@
+module.exports = require('./plugin/build');

packages/auth/package.json

@@ -8,7 +8,9 @@
   "scripts": {
     "build": "genversion --semi lib/version.js",
     "build:clean": "rimraf android/build && rimraf ios/build",
-    "prepare": "yarn run build"
+    "build:plugin": "rimraf plugin/build && tsc --build plugin", 
+    "lint:plugin": "eslint plugin/src/*", 
+    "prepare": "yarn run build && yarn run build:plugin" 
   },
   "repository": {
     "type": "git",
@@ -21,10 +23,17 @@
     "firebase",
     "auth"
   ],
+  "dependencies": {
+    "plist": "^3.0.5",
+    "@expo/config-plugins": "^5.0.1"
+  },
   "peerDependencies": {
     "@react-native-firebase/app": "16.3.1"
   },
   "publishConfig": {
     "access": "public"
+  },
+  "devDependencies": {
+    "@types/plist": "^3.0.2"
   }
 }

packages/auth/plugin/__tests__/__snapshots__/iosPlugin.test.ts.snap

@@ -0,0 +1,13 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Config Plugin iOS Tests adds url types to the Info.plist 1`] = `
+{
+  "CFBundleURLTypes": [
+    {
+      "CFBundleURLSchemes": [
+        "com.googleusercontent.apps.SomeRandomClientIdString",
+      ],
+    },
+  ],
+}
+`;

packages/auth/plugin/__tests__/fixtures/TestGoogleService-Info.incomplete.plist

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+</dict>
+</plist>

packages/auth/plugin/__tests__/fixtures/TestGoogleService-Info.plist

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CLIENT_ID</key>
+	<string>SomeRandomClientIdString.apps.googleusercontent.com</string>
+	<key>REVERSED_CLIENT_ID</key>
+	<string>com.googleusercontent.apps.SomeRandomClientIdString</string>
+	<key>ANDROID_CLIENT_ID</key>
+	<string>SomeRandomAndroidClientIdString.apps.googleusercontent.com</string>
+	<key>API_KEY</key>
+	<string>SomeRandomApiKeyString</string>
+	<key>GCM_SENDER_ID</key>
+	<string>SomeRandomGcmSenderIdNumber</string>
+	<key>PLIST_VERSION</key>
+	<string>1</string>
+	<key>BUNDLE_ID</key>
+	<string>com.example.app</string>
+	<key>PROJECT_ID</key>
+	<string>example</string>
+	<key>STORAGE_BUCKET</key>
+	<string>example.appspot.com</string>
+	<key>IS_ADS_ENABLED</key>
+	<false></false>
+	<key>IS_ANALYTICS_ENABLED</key>
+	<false></false>
+	<key>IS_APPINVITE_ENABLED</key>
+	<true></true>
+	<key>IS_GCM_ENABLED</key>
+	<true></true>
+	<key>IS_SIGNIN_ENABLED</key>
+	<true></true>
+	<key>GOOGLE_APP_ID</key>
+	<string>1234:1234:ios:1234</string>
+	<key>DATABASE_URL</key>
+	<string>https://example.firebaseio.com</string>
+</dict>
+</plist>

packages/auth/plugin/__tests__/iosPlugin.test.ts

@@ -0,0 +1,75 @@
+import path from 'path';
+import { beforeEach, describe, expect, it, jest } from '@jest/globals';
+import { setUrlTypesForCaptcha } from '../src/ios/urlTypes';
+
+describe('Config Plugin iOS Tests', () => {
+  beforeEach(function () {
+    jest.resetAllMocks();
+  });
+
+  it('throws if path to GoogleServer-Info.plist is not provided', async () => {
+    expect(() => {
+      setUrlTypesForCaptcha({
+        config: {
+          name: 'TestName',
+          slug: 'TestSlug',
+          modRequest: { projectRoot: path.join(__dirname, 'fixtures') } as any,
+          modResults: {},
+          modRawConfig: { name: 'TestName', slug: 'TestSlug' },
+          ios: {},
+        },
+      });
+    }).toThrow(
+      `[@react-native-firebase/auth] Your app.json file is missing ios.googleServicesFile. Please add this field.`,
+    );
+  });
+
+  it('throws if GoogleServer-Info.plist cannot be read', async () => {
+    const googleServiceFilePath = path.join(__dirname, 'fixtures', 'ThisFileDoesNotExist.plist');
+    expect(() => {
+      setUrlTypesForCaptcha({
+        config: {
+          name: 'TestName',
+          slug: 'TestSlug',
+          modRequest: { projectRoot: path.join(__dirname, 'fixtures') } as any,
+          modResults: {},
+          modRawConfig: { name: 'TestName', slug: 'TestSlug' },
+          ios: { googleServicesFile: 'ThisFileDoesNotExist.plist' },
+        },
+      });
+    }).toThrow(
+      `[@react-native-firebase/auth] GoogleService-Info.plist doesn't exist in ${googleServiceFilePath}. Place it there or configure the path in app.json`,
+    );
+  });
+
+  it('throws if GoogleServer-Info.plist has no reversed client id', async () => {
+    expect(() => {
+      setUrlTypesForCaptcha({
+        config: {
+          name: 'TestName',
+          slug: 'TestSlug',
+          modRequest: { projectRoot: path.join(__dirname, 'fixtures') } as any,
+          modResults: {},
+          modRawConfig: { name: 'TestName', slug: 'TestSlug' },
+          ios: { googleServicesFile: 'TestGoogleService-Info.incomplete.plist' },
+        },
+      });
+    }).toThrow(
+      '[@react-native-firebase/auth] Failed to parse your GoogleService-Info.plist. Are you sure it is a valid Info.Plist file with a REVERSE_CLIENT_ID field?',
+    );
+  });
+
+  it('adds url types to the Info.plist', async () => {
+    const result = setUrlTypesForCaptcha({
+      config: {
+        name: 'TestName',
+        slug: 'TestSlug',
+        modRequest: { projectRoot: path.join(__dirname, 'fixtures') } as any,
+        modResults: {},
+        modRawConfig: { name: 'TestName', slug: 'TestSlug' },
+        ios: { googleServicesFile: 'TestGoogleService-Info.plist' },
+      },
+    });
+    expect(result.modResults).toMatchSnapshot();
+  });
+});

packages/auth/plugin/src/index.ts

@@ -0,0 +1,16 @@
+import { ConfigPlugin, withPlugins, createRunOncePlugin } from '@expo/config-plugins';
+
+import { withIosCaptchaUrlTypes } from './ios';
+
+/**
+ * A config plugin for configuring `@react-native-firebase/auth`
+ */
+const withRnFirebaseAuth: ConfigPlugin = config => {
+  return withPlugins(config, [
+    // iOS
+    withIosCaptchaUrlTypes,
+  ]);
+};
+
+const pak = require('@react-native-firebase/auth/package.json');
+export default createRunOncePlugin(withRnFirebaseAuth, pak.name, pak.version);

packages/auth/plugin/src/ios/index.ts

@@ -0,0 +1,3 @@
+import { withIosCaptchaUrlTypes } from './urlTypes';
+
+export { withIosCaptchaUrlTypes };

packages/auth/plugin/src/ios/urlTypes.ts

@@ -0,0 +1,90 @@
+import {
+  ConfigPlugin,
+  IOSConfig,
+  withInfoPlist,
+  ExportedConfigWithProps,
+} from '@expo/config-plugins';
+import fs from 'fs';
+import path from 'path';
+import plist from 'plist';
+
+// does this for you: https://firebase.google.com/docs/auth/ios/phone-auth#enable-phone-number-sign-in-for-your-firebase-project
+export const withIosCaptchaUrlTypes: ConfigPlugin = config => {
+  return withInfoPlist(config, config => {
+    return setUrlTypesForCaptcha({ config });
+  });
+};
+
+function getReversedClientId(googleServiceFilePath: string): string {
+  try {
+    const googleServicePlist = fs.readFileSync(googleServiceFilePath, 'utf8');
+
+    const googleServiceJson = plist.parse(googleServicePlist) as { REVERSED_CLIENT_ID: string };
+    const REVERSED_CLIENT_ID = googleServiceJson.REVERSED_CLIENT_ID;
+
+    if (!REVERSED_CLIENT_ID) {
+      throw new TypeError('REVERSED_CLIENT_ID missing');
+    }
+
+    return REVERSED_CLIENT_ID;
+  } catch {
+    throw new Error(
+      '[@react-native-firebase/auth] Failed to parse your GoogleService-Info.plist. Are you sure it is a valid Info.Plist file with a REVERSE_CLIENT_ID field?',
+    );
+  }
+}
+
+// add phone auth support by configuring recaptcha
+// https://github.com/invertase/react-native-firebase/pull/6167
+function addUriScheme(
+  config: ExportedConfigWithProps<IOSConfig.InfoPlist>,
+  reversedClientId: string,
+): ExportedConfigWithProps<IOSConfig.InfoPlist> {
+  if (!config.modResults) {
+    config.modResults = {};
+  }
+
+  if (!config.modResults.CFBundleURLTypes) {
+    config.modResults.CFBundleURLTypes = [];
+  }
+
+  const hasReverseClientId = config.modResults.CFBundleURLTypes?.some(urlType =>
+    urlType.CFBundleURLSchemes.includes(reversedClientId),
+  );
+
+  if (!hasReverseClientId) {
+    config.modResults.CFBundleURLTypes.push({
+      CFBundleURLSchemes: [reversedClientId],
+    });
+  }
+
+  return config;
+}
+
+export function setUrlTypesForCaptcha({
+  config,
+}: {
+  config: ExportedConfigWithProps<IOSConfig.InfoPlist>;
+}) {
+  const googleServicesFileRelativePath = config.ios?.googleServicesFile;
+  if (!googleServicesFileRelativePath) {
+    throw new Error(
+      `[@react-native-firebase/auth] Your app.json file is missing ios.googleServicesFile. Please add this field.`,
+    );
+  }
+  const googleServiceFilePath = path.resolve(
+    config.modRequest.projectRoot,
+    googleServicesFileRelativePath,
+  );
+
+  if (!fs.existsSync(googleServiceFilePath)) {
+    throw new Error(
+      `[@react-native-firebase/auth] GoogleService-Info.plist doesn't exist in ${googleServiceFilePath}. Place it there or configure the path in app.json`,
+    );
+  }
+
+  const reversedClientId = getReversedClientId(googleServiceFilePath);
+  addUriScheme(config, reversedClientId);
+
+  return config;
+}

packages/auth/plugin/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "extends": "@tsconfig/node12/tsconfig.json",
+  "compilerOptions": {
+    "outDir": "build",
+    "rootDir": "src",
+    "declaration": true
+  },
+  "include": ["./src"]
+}