function fuiHandleAnonymous()

in auth/firebaseui.js [260:301]

• 26 lines of code
• 2 McCabe index (conditional complexity)

function fuiHandleAnonymous() {
  var ui = fuiInit();
  // [START auth_fui_handle_anonymous]
  // Temp variable to hold the anonymous user data if needed.
  var data = null;
  // Hold a reference to the anonymous current user.
  var anonymousUser = firebase.auth().currentUser;
  ui.start('#firebaseui-auth-container', {
    // Whether to upgrade anonymous users should be explicitly provided.
    // The user must already be signed in anonymously before FirebaseUI is
    // rendered.
    autoUpgradeAnonymousUsers: true,
    signInSuccessUrl: '<url-to-redirect-to-on-success>',
    signInOptions: [
      firebase.auth.GoogleAuthProvider.PROVIDER_ID,
      firebase.auth.FacebookAuthProvider.PROVIDER_ID,
      firebase.auth.EmailAuthProvider.PROVIDER_ID,
      firebase.auth.PhoneAuthProvider.PROVIDER_ID
    ],
    callbacks: {
      // signInFailure callback must be provided to handle merge conflicts which
      // occur when an existing credential is linked to an anonymous user.
      signInFailure: (error) => {
        // For merge conflicts, the error.code will be
        // 'firebaseui/anonymous-upgrade-merge-conflict'.
        if (error.code != 'firebaseui/anonymous-upgrade-merge-conflict') {
          return Promise.resolve();
        }
        // The credential the user tried to sign in with.
        var cred = error.credential;
        // Copy data from anonymous user to permanent user and delete anonymous
        // user.
        // ...
        // Finish sign-in after data is copied.
        return firebase.auth().signInWithCredential(cred).then(() => {
          return;
        });
      }
    }
  });
  // [END auth_fui_handle_anonymous]
}