how to save username and email to firebase - ios

Question

i have watched some tutorial about save user info to DataBase after register or SignUp in the app but the problem that he save all the users by there uid and what i want is to save the users by there usernames what do you think is the professional or the better way to do that or it doesn't matter to chat app
#IBAction func SignUp(_ sender: Any) {
if username.text != nil, email.text != nil, password.text != nil, fullname.text != nil {
activityIndicator.startAnimating()
Auth.auth().createUser(withEmail: email.text!, password: password.text!, completion: { (user, error) in
if error != nil {
AlertController.showAlert(self, titel: "Error", message:".Fill all fields\n .User do exists\n .Network error ")
self.activityIndicator.stopAnimating()
return
}
let uid = user?.uid
let storageRef = Storage.storage().reference(forURL: "gs://,,,,,,,,,.com").child("profile_image").child(uid!)
if let profileImg = self.selectedImage, let imageData = UIImageJPEGRepresentation(profileImg, 0.1){
storageRef.putData( imageData, metadata: nil, completion: { (metadata, error) in
if error != nil{
return
}
let profileImageUrl = metadata?.downloadURL()?.absoluteString
let ref = Database.database().reference()
let usersReferance = ref.child("users")
let newUserReferance = usersReferance.child(uid!)
newUserReferance.setValue(["fullname": self.fullname.text, "username": self.username.text, "email": self.email.text, "password": self.password.text, "profileImageUrl": profileImageUrl])
})
}
self.dismiss(animated: true, completion: nil)
self.activityIndicator.stopAnimating()
})
}
}
}

Answer 1

if you want to save the users by their username yes you can do as follow
#IBAction func SignUp(_ sender: Any) {
if username.text != "", email.text != "", password.text != "", fullname.text != "" {
activityIndicator.startAnimating()
Auth.auth().createUser(withEmail: email.text!, password: password.text!, completion: { (user, error) in
if error != nil {
AlertController.showAlert(self, titel: "Error", message:".Fill all fields\n .User do exists\n .Network error ")
self.activityIndicator.stopAnimating()
return
}
let uid = user?.uid // here you are providing userID
let storageRef = Storage.storage().reference(forURL: "gs://.........com").child("profile_image").child(uid!)
if let profileImg = self.selectedImage, let imageData = UIImageJPEGRepresentation(profileImg, 0.1){
storageRef.putData( imageData, metadata: nil, completion: { (metadata, error) in
if error != nil{
return
}
let profileImageUrl = metadata?.downloadURL()?.absoluteString
let ref = Database.database().reference()
let usersReferance = ref.child("users")
// let newUserReferance = usersReferance.child(uid!) //here in ref you are creating a node with UID
//use your username
let newUserReferance = usersReferance.child(username.text!)
//set child values here as you doing
newUserReferance.setValue(["fullname": self.fullname.text, "username": self.username.text, "email": self.email.text, "password": self.password.text, "profileImageUrl": profileImageUrl])
})
}
self.dismiss(animated: true, completion: nil)
self.activityIndicator.stopAnimating()
})
}
}
For 2 . 1) I do not think it will be a bette approach as if you set node with username if while signUp other user filled same username data will be replaced with new data
2) if you use some checks that username is valid or not it will work , but just for concern need a additional reference in database for it to check username is available or not
-- Do as check in whole database that username is taken or not
-- or make a node with list of usernames and and get all those in array and check offline for a fast response with textfield validations or can even put observe event