Allowing specefic users to delete post Swift 4 Firebase - ios

Question

i have just created so the users can comment on other users post and delete the comments if they want to delete them.
but with this code everyone can delete everyone´s comments
func getKeysValue() {
// let uid = Auth.auth().currentUser?.uid
Database.database().reference().child("posts").child(postsKey).child("comments").observe( .value) { (snapshot) in
for child in snapshot.children {
let snap = child as! DataSnapshot
let commentKey = snap.key
self.keyArray.insert(commentKey, at: 0)
// print(self.keyArray)
// print("Here is the specific Key\(self.commentKey)")
}
}
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
getKeysValue()
let when = DispatchTime.now() + 1
DispatchQueue.main.asyncAfter(deadline: when, execute: {
Database.database().reference().child("posts").child(postsKey).child("comments").child(self.keyArray[indexPath.row]).removeValue()
self.commentsTableView.reloadData()
})
}
}
then i tryed this code to only let the user to only delete its own comments:
func getKeysValue() {
// let uid = Auth.auth().currentUser?.uid
Database.database().reference().child("posts").child(postsKey).child("comments").observe( .value) { (snapshot) in
for child in snapshot.children {
let snap = child as! DataSnapshot
let commentKey = snap.key
self.keyArray.insert(commentKey, at: 0)
// print(self.keyArray)
// print("Here is the specific Key\(self.commentKey)")
}
}
}
var uid = Auth.auth().currentUser?.uid
var userID = String()
var idUser = String()
var userUID = String()
func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
getKeysValue()
let when = DispatchTime.now() + 1
DispatchQueue.main.asyncAfter(deadline: when, execute: {
self.userID = self.keyArray[indexPath.row]
self.idUser = self.userID
print(" Here is the indexPath key: \(self.idUser)")
Database.database().reference().child("posts").child(postsKey).child("comments").child(self.idUser).observeSingleEvent(of: .value, with: { (snapshot) in
if let postsDictionary = snapshot.value as? [String: AnyObject] {
self.uidArray.insert(postsDictionary as NSDictionary, at: 0)
let usersArray = self.uidArray[indexPath.row] as! [String: AnyObject]
let usersKey = usersArray["uid"] as? String
self.userUID = usersKey!
print("Here is the Comment:\(self.uidArray)")
print("And here is the UID::: \(self.userUID)")
if self.uid != self.userUID {
let logInAlert = UIAlertController(title: "Failed to delete", message: "You can only delete your own comment(s)", preferredStyle: .actionSheet)
logInAlert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
self.present(logInAlert, animated: true, completion: nil)
}else {
let commentSuccess = self.storyboard?.instantiateViewController(withIdentifier: "CommentReloadVC")
self.present(commentSuccess!, animated: false, completion: nil)
Database.database().reference().child("posts").child(postsKey).child("comments").child(self.keyArray[indexPath.row]).removeValue()
self.commentsTableView.reloadData()
}
}
})
})
}
}
soo whats wrong with this code? the thing is that this work perfect but only on the first row off the tableview that will say that this authorazation code only works with the first comment of the post and if you try to delete any other comment below the first one then i get an error that the index is out of range on this line
let usersArray = self.uidArray[indexPath.row] as! [String: AnyObject]
and this is how it looks in the database:
this looks like it should work but it does not it's probably something really easy but i just cant figure this out so help would be much appreciated
Thanks for your time. :)