Revamp environment check for firebase app (#1757)

* rewrite environment check for firebase app

* [AUTOMATED]: Prettier Code Styling

packages/app/index.ts

@@ -17,45 +17,53 @@
 
 import { FirebaseNamespace } from '@firebase/app-types';
 import { createFirebaseNamespace } from './src/firebaseNamespace';
+import { isNode, isBrowser } from '@firebase/util';
+import { Logger } from '@firebase/logger';
 
-// Node detection logic from: https://github.com/iliakan/detect-node/
-let isNode = false;
-try {
-  isNode =
-    Object.prototype.toString.call(global.process) === '[object process]';
-} catch (e) {}
-
-isNode &&
-  console.warn(`
-Warning: This is a browser-targeted Firebase bundle but it appears it is being
-run in a Node environment.  If running in a Node environment, make sure you
-are using the bundle specified by the "main" field in package.json.
-
-If you are using Webpack, you can specify "main" as the first item in
-"resolve.mainFields":
-https://webpack.js.org/configuration/resolve/#resolvemainfields
-
-If using Rollup, use the rollup-plugin-node-resolve plugin and set "module"
-to false and "main" to true:
-https://github.com/rollup/rollup-plugin-node-resolve
-`);
+const logger = new Logger('@firebase/app');
 
 // Firebase Lite detection
-if (self && 'firebase' in self) {
-  console.warn(`
+if (isBrowser() && 'firebase' in self) {
+  logger.warn(`
     Warning: Firebase is already defined in the global scope. Please make sure
     Firebase library is only loaded once.
   `);
 
   const sdkVersion = ((self as any).firebase as FirebaseNamespace).SDK_VERSION;
   if (sdkVersion && sdkVersion.indexOf('LITE') >= 0) {
-    console.warn(`
+    logger.warn(`
     Warning: You are trying to load Firebase while using Firebase Performance standalone script.
     You should load Firebase Performance with this instance of Firebase to avoid loading duplicate code.
     `);
   }
 }
 
-export const firebase = createFirebaseNamespace();
+const firebaseNamespace = createFirebaseNamespace();
+const initializeApp = firebaseNamespace.initializeApp;
+
+firebaseNamespace.initializeApp = function() {
+  // Environment check before initializing app
+  // Do the check in initializeApp, so people have a chance to disable it by setting logLevel
+  // in @firebase/logger
+  if (isNode()) {
+    logger.warn(`
+      Warning: This is a browser-targeted Firebase bundle but it appears it is being
+      run in a Node environment.  If running in a Node environment, make sure you
+      are using the bundle specified by the "main" field in package.json.
+      
+      If you are using Webpack, you can specify "main" as the first item in
+      "resolve.mainFields":
+      https://webpack.js.org/configuration/resolve/#resolvemainfields
+      
+      If using Rollup, use the rollup-plugin-node-resolve plugin and set "module"
+      to false and "main" to true:
+      https://github.com/rollup/rollup-plugin-node-resolve
+      `);
+  }
+
+  return initializeApp.apply(undefined, arguments);
+};
+
+export const firebase = firebaseNamespace;
 
 export default firebase;

packages/app/package.json

@@ -26,6 +26,7 @@
   "dependencies": {
     "@firebase/app-types": "0.4.0",
     "@firebase/util": "0.2.14",
+    "@firebase/logger": "0.1.13",
     "tslib": "1.9.3",
     "dom-storage": "2.1.0",
     "xmlhttprequest": "1.8.0"

packages/util/index.ts

@@ -15,67 +15,18 @@
  * limitations under the License.
  */
 
-export { assert, assertionError } from './src/assert';
-export { base64, base64Decode, base64Encode } from './src/crypt';
-export { CONSTANTS } from './src/constants';
-export { deepCopy, deepExtend, patchProperty } from './src/deepCopy';
-export { Deferred } from './src/deferred';
-export {
-  getUA,
-  isMobileCordova,
-  isNodeSdk,
-  isReactNative
-} from './src/environment';
-export {
-  ErrorFactory,
-  ErrorMap,
-  FirebaseError,
-  StringLike
-} from './src/errors';
-export { jsonEval, stringify } from './src/json';
-export {
-  decode,
-  isAdmin,
-  issuedAtTime,
-  isValidFormat,
-  isValidTimestamp
-} from './src/jwt';
-export {
-  clone,
-  contains,
-  every,
-  extend,
-  findKey,
-  findValue,
-  forEach,
-  getAnyKey,
-  getCount,
-  getValues,
-  isEmpty,
-  isNonNullObject,
-  map,
-  safeGet
-} from './src/obj';
-export { querystring, querystringDecode } from './src/query';
-export { Sha1 } from './src/sha1';
-export {
-  async,
-  CompleteFn,
-  createSubscribe,
-  ErrorFn,
-  Executor,
-  NextFn,
-  Observable,
-  Observer,
-  PartialObserver,
-  Subscribe,
-  Unsubscribe
-} from './src/subscribe';
-export {
-  errorPrefix,
-  validateArgCount,
-  validateCallback,
-  validateContextObject,
-  validateNamespace
-} from './src/validation';
-export { stringLength, stringToByteArray } from './src/utf8';
+export * from './src/assert';
+export * from './src/crypt';
+export * from './src/constants';
+export * from './src/deepCopy';
+export * from './src/deferred';
+export * from './src/environment';
+export * from './src/errors';
+export * from './src/json';
+export * from './src/jwt';
+export * from './src/obj';
+export * from './src/query';
+export * from './src/sha1';
+export * from './src/subscribe';
+export * from './src/validation';
+export * from './src/utf8';

packages/util/src/environment.ts

@@ -21,7 +21,7 @@ import { CONSTANTS } from './constants';
  * Returns navigator.userAgent string or '' if it's not defined.
  * @return {string} user agent string
  */
-export const getUA = function() {
+export function getUA(): string {
   if (
     typeof navigator !== 'undefined' &&
     typeof navigator['userAgent'] === 'string'
@@ -30,7 +30,7 @@ export const getUA = function() {
   } else {
     return '';
   }
-};
+}
 
 /**
  * Detect Cordova / PhoneGap / Ionic frameworks on a mobile device.
@@ -40,30 +40,53 @@ export const getUA = function() {
  *
  * @return {boolean} isMobileCordova
  */
-export const isMobileCordova = function() {
+export function isMobileCordova(): boolean {
   return (
     typeof window !== 'undefined' &&
     !!(window['cordova'] || window['phonegap'] || window['PhoneGap']) &&
     /ios|iphone|ipod|ipad|android|blackberry|iemobile/i.test(getUA())
   );
-};
+}
+
+/**
+ * Detect Node.js.
+ *
+ * @return {boolean} True if Node.js environment is detected.
+ * Node detection logic from: https://github.com/iliakan/detect-node/
+ */
+export function isNode(): boolean {
+  try {
+    return (
+      Object.prototype.toString.call(global.process) === '[object process]'
+    );
+  } catch (e) {
+    return false;
+  }
+}
+
+/**
+ * Detect Browser Environment
+ */
+export function isBrowser(): boolean {
+  return typeof window !== 'undefined';
+}
 
 /**
  * Detect React Native.
  *
  * @return {boolean} True if ReactNative environment is detected.
  */
-export const isReactNative = function() {
+export function isReactNative(): boolean {
   return (
     typeof navigator === 'object' && navigator['product'] === 'ReactNative'
   );
-};
+}
 
 /**
- * Detect Node.js.
+ * Detect whether the current SDK build is the Node version.
  *
- * @return {boolean} True if Node.js environment is detected.
+ * @return {boolean} True if it's the Node SDK build.
  */
-export const isNodeSdk = function() {
+export function isNodeSdk(): boolean {
   return CONSTANTS.NODE_CLIENT === true || CONSTANTS.NODE_ADMIN === true;
-};
+}