Demo.prototype.onAuthStateChanged = function()

in fcm-notifications/public/main.js [43:77]

• 30 lines of code
• 5 McCabe index (conditional complexity)

Demo.prototype.onAuthStateChanged = function(user) {
  // If this is just an ID token refresh we exit.
  if (user && this.currentUid === user.uid) {
    return;
  }

  // Remove all Firebase realtime database listeners.
  if (this.listeners) {
    this.listeners.forEach(function(ref) {
      ref.off();
    });
  }
  this.listeners = [];

  // Adjust UI depending on user state.
  if (user) {
    this.nameContainer.innerText = user.displayName;
    this.signedOutCard.style.display = 'none';
    this.signedInCard.style.display = 'block';
    this.usersCard.style.display = 'block';
    firebase.database().ref(`users/${user.uid}`).update({
      displayName: user.displayName,
      photoURL: user.photoURL
    });
    this.saveToken();
    this.displayAllUsers();
    this.currentUid = user.uid;
  } else {
    this.signedOutCard.style.display = 'block';
    this.signedInCard.style.display = 'none';
    this.usersCard.style.display = 'none';
    this.usersContainer.innerHTML = '';
    this.currentUid = null;
  }
};