Add OIDC provider snippets.

This is a Google Cloud Identity Platform provider.

Author: chronologos

auth-next/oidc.js

@@ -0,0 +1,93 @@
+// [SNIPPET_REGISTRY disabled]
+// [SNIPPETS_SEPARATION enabled]
+
+function oidcProvider() {
+  // [START auth_oidc_provider_create]
+  const { OAuthProvider } = require("firebase/auth");
+
+  const provider = new OAuthProvider("oidc.myProvider");
+  // [END auth_oidc_provider_create]
+}
+
+function oidcSignInPopup(provider) {
+  // [START auth_oidc_signin_popup]
+  const { getAuth, signInWithPopup, OAuthProvider } = require("firebase/auth");
+
+  const auth = getAuth();
+  signInWithPopup(auth, provider)
+    .then((result) => {
+      // User is signed in.
+    }).catch((error) => {
+      // Handle Errors here.
+      const errorCode = error.code;
+      const errorMessage = error.message;
+      // The email of the user's account used.
+      const email = error.email;
+      // The AuthCredential type that was used.
+      const credential = OAuthProvider.credentialFromError(error);
+      // ...
+    });
+  // [END auth_oidc_signin_popup]
+}
+
+function oidcSignInRedirect(provider) {
+  // [START auth_oidc_signin_redirect]
+  const { getAuth, signInWithRedirect } = require("firebase/auth");
+
+  const auth = getAuth();
+  signInWithRedirect(auth, provider);
+  // [END auth_oidc_signin_redirect]
+}
+
+function oidcSignInRedirectResult(provider) {
+  // [START auth_oidc_signin_redirect_result]
+  import { getAuth, getRedirectResult, OAuthProvider } from "firebase/auth";
+
+  const auth = getAuth();
+  getRedirectResult(auth)
+    .then((result) => {
+      credential = OAuthProvider.credentialFromResult(result);
+      // ...
+    })
+    .catch((error) => {
+      // Handle Errors here.
+      const errorCode = error.code;
+      const errorMessage = error.message;
+      // The email of the user's account used.
+      const email = error.email;
+      // The AuthCredential type that was used.
+      const credential = OAuthProvider.credentialFromError(error);
+      console.log(error);
+      console.log(credential);
+      // ...
+    });
+  // [END auth_oidc_signin_redirect_result]
+}
+
+function oidcDirectSignIn(provider, oidcIdToken) {
+  // [START auth_oidc_direct_sign_in]
+  import { getAuth, OAuthProvider } from "firebase/auth";
+
+  const auth = getAuth();
+  const credential = provider.credential({
+    idToken: oidcIdToken,
+  })
+  signInWithCredential(auth, credential)
+    .then((result) => {
+      credential = OAuthProvider.credentialFromResult(result);
+      // ...
+    })
+    .catch((error) => {
+      // Handle Errors here.
+      const errorCode = error.code;
+      const errorMessage = error.message;
+      // The email of the user's account used.
+      const email = error.email;
+      // The AuthCredential type that was used.
+      const credential = OAuthProvider.credentialFromError(error);
+      console.log(error);
+      console.log(credential);
+      // ...
+    });
+  // [END auth_oidc_direct_sign_in]
+}

auth/oidc.js

@@ -0,0 +1,60 @@
+// [SNIPPET_REGISTRY disabled]
+// [SNIPPETS_SEPARATION enabled]
+
+function oidcProvider() {
+  // [START auth_oidc_provider_create]
+  const provider = new firebase.auth.OAuthProvider('oidc.myProvider');
+  // [END auth_oidc_provider_create]
+}
+
+function oidcSignInPopup(provider) {
+  // [START auth_oidc_signin_popup]
+  firebase.auth().signInWithPopup(provider)
+    .then((result) => {
+      // result.credential is a firebase.auth.OAuthCredential object.
+      // result.credential.providerId is equal to 'oidc.myProvider'.
+      // result.credential.idToken is the OIDC provider's ID token.
+    })
+    .catch((error) => {
+      // Handle error.
+    });
+  // [END auth_oidc_signin_popup]
+}
+
+function oidcSignInRedirect(provider) {
+  // [START auth_oidc_signin_redirect]
+  firebase.auth().signInWithRedirect(provider).catch((error) => {
+    // Handle error.
+  });
+  // [END auth_oidc_signin_redirect]
+}
+
+function oidcSignInRedirectResult(provider) {
+  // [START auth_oidc_signin_redirect_result]
+  // On return.
+  firebase.auth().getRedirectResult()
+    .then((result) => {
+      // result.credential is a firebase.auth.OAuthCredential object.
+      // result.credential.providerId is equal to 'oidc.myProvider'.
+      // result.credential.idToken is the OIDC provider's ID token.
+    })
+    .catch((error) => {
+      // Handle error.
+    });
+  // [END auth_oidc_signin_redirect_result]
+}
+
+function oidcDirectSignIn(provider, oidcIdToken) {
+  // [START auth_oidc_direct_sign_in]
+  const credential = provider.credential(oidcIdToken, null);
+
+  firebase.auth().signInWithCredential(credential)
+    .then((result) => {
+      // user now has a odic.myProvider UserInfo in providerData.
+    })
+    .catch((error) => {
+      // Handle error.
+    });
+  // [END auth_oidc_direct_sign_in]
+}
+