How to retrieve data of current user from firebase - ios

Question

I'm, developing a simple app to store users images. User authorized via Facebook, and the interact with app.
I stuck with retrieving data from current user.
In my firebase for now I have such structure:
I decided to get user data by uid.
So I initialized variable
let userID = FIRAuth.auth()?.currentUser?.uid
Then I retrieve an array of objects from my database
URL_BASE.child("profile").observeEventType(.Value, withBlock: { (snapshot) in
print (snapshot.value as! [String:AnyObject]!)
})
}
In my output I have this:
"-KJSKE4a2y-okl71vDSx": {
Interest = men;
gender = female;
name = girlsname1;
photo = "http://i.imgur.com/VAWlQ0S.gif";
surname = girlsurname1;
}, "-KJSKE4b8TlvxV-urHQo": {
Interest = men;
gender = female;
name = girlsname6;
photo = "http://media.tumblr.com/tumblr_lnb9aozmM71qbxrlp.gif";
surname = girlsurname6;
And so on
It is ok, but my goal is to print data of currently authorized user. I have an idea of sorting all objects by uid, but I think it is irrational. Hope there is simpler solution.
Authorized users stores in users database. profile database consist of user parameters I'm getting from Facebook.

Answer 1

let userID : String = (FIRAuth.auth()?.currentUser?.uid)!
print("Current user ID is" + userID)
self.dbRef?.child("profile").child(userID).observeSingleEvent(of: .value, with: {(snapshot) in
print(snapshot.value)
let userEmail = (snapshot.value as! NSDictionary)["addedByUser"] as! String
print(userEmail)
})

Answer 2

In Firebase, all users have a uid as you know. The uid should be used as the key for each user node in /users.
uid_0
gender: male
name: Leroy
uid_1
gender: female?
name: pat
This is a common design pattern in Firebase.
With that, you can simply get any user by their uid
let thisUserRef = usersRef.childByAppendingPath("the uid")
thisUserRef.observeSingleEventOfType(.Value... {
let gender = snapshot.value["gender"]
}