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google-signin.js
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google-signin.js
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// These samples are intended for Web so this import would normally be
// done in HTML however using modules here is more convenient for
// ensuring sample correctness offline.
import firebase from "firebase/app";
import "firebase/auth";
// Docs: https://source.corp.google.com/piper///depot/google3/third_party/devsite/firebase/en/docs/auth/web/google-signin.md
function googleProvider() {
// [START auth_google_provider_create]
var provider = new firebase.auth.GoogleAuthProvider();
// [END auth_google_provider_create]
// [START auth_google_provider_scopes]
provider.addScope('https://www.googleapis.com/auth/contacts.readonly');
// [END auth_google_provider_scopes]
// [START auth_google_provider_params]
provider.setCustomParameters({
'login_hint': 'user@example.com'
});
// [END auth_google_provider_params]
}
function googleSignInPopup(provider) {
// [START auth_google_signin_popup]
firebase.auth()
.signInWithPopup(provider)
.then((result) => {
/** @type {firebase.auth.OAuthCredential} */
var credential = result.credential;
// This gives you a Google Access Token. You can use it to access the Google API.
var token = credential.accessToken;
// The signed-in user info.
var user = result.user;
// IdP data available in result.additionalUserInfo.profile.
// ...
}).catch((error) => {
// Handle Errors here.
var errorCode = error.code;
var errorMessage = error.message;
// The email of the user's account used.
var email = error.email;
// The firebase.auth.AuthCredential type that was used.
var credential = error.credential;
// ...
});
// [END auth_google_signin_popup]
}
function googleSignInRedirectResult() {
// [START auth_google_signin_redirect_result]
firebase.auth()
.getRedirectResult()
.then((result) => {
if (result.credential) {
/** @type {firebase.auth.OAuthCredential} */
var credential = result.credential;
// This gives you a Google Access Token. You can use it to access the Google API.
var token = credential.accessToken;
// ...
}
// The signed-in user info.
var user = result.user;
// IdP data available in result.additionalUserInfo.profile.
// ...
}).catch((error) => {
// Handle Errors here.
var errorCode = error.code;
var errorMessage = error.message;
// The email of the user's account used.
var email = error.email;
// The firebase.auth.AuthCredential type that was used.
var credential = error.credential;
// ...
});
// [END auth_google_signin_redirect_result]
}
function googleBuildAndSignIn(id_token) {
// [START auth_google_build_signin]
// Build Firebase credential with the Google ID token.
var credential = firebase.auth.GoogleAuthProvider.credential(id_token);
// Sign in with credential from the Google user.
firebase.auth().signInWithCredential(credential).catch((error) => {
// Handle Errors here.
var errorCode = error.code;
var errorMessage = error.message;
// The email of the user's account used.
var email = error.email;
// The firebase.auth.AuthCredential type that was used.
var credential = error.credential;
// ...
});
// [END auth_google_build_signin]
}
// [START auth_google_callback]
function onSignIn(googleUser) {
console.log('Google Auth Response', googleUser);
// We need to register an Observer on Firebase Auth to make sure auth is initialized.
var unsubscribe = firebase.auth().onAuthStateChanged((firebaseUser) => {
unsubscribe();
// Check if we are already signed-in Firebase with the correct user.
if (!isUserEqual(googleUser, firebaseUser)) {
// Build Firebase credential with the Google ID token.
var credential = firebase.auth.GoogleAuthProvider.credential(
googleUser.getAuthResponse().id_token);
// Sign in with credential from the Google user.
// [START auth_google_signin_credential]
firebase.auth().signInWithCredential(credential).catch((error) => {
// Handle Errors here.
var errorCode = error.code;
var errorMessage = error.message;
// The email of the user's account used.
var email = error.email;
// The firebase.auth.AuthCredential type that was used.
var credential = error.credential;
// ...
});
// [END auth_google_signin_credential]
} else {
console.log('User already signed-in Firebase.');
}
});
}
// [END auth_google_callback]
// [START auth_google_checksameuser]
function isUserEqual(googleUser, firebaseUser) {
if (firebaseUser) {
var providerData = firebaseUser.providerData;
for (var i = 0; i < providerData.length; i++) {
if (providerData[i].providerId === firebase.auth.GoogleAuthProvider.PROVIDER_ID &&
providerData[i].uid === googleUser.getBasicProfile().getId()) {
// We don't need to reauth the Firebase connection.
return true;
}
}
}
return false;
}
// [END auth_google_checksameuser]
function googleProviderCredential(idToken) {
// [START auth_google_provider_credential]
var credential = firebase.auth.GoogleAuthProvider.credential(idToken);
// [END auth_google_provider_credential]
}