<?php
/* This Class is the basic user model */
class User {
     // Constants
     const NICKNAME_MAXLENGTH = 20;
     const NICKNAME_MINLENGTH = 3;
     const PASSWORD_MAXLENGTH = 30;
     const PASSWORD_MINLENGTH = 5;
     // Atributes
     private $user_id;
     private $nickname;
     private $password;

     public function __construct($nickname, $password) {
         $this->nickname = $nickname;
         $this->password = $password;
     }

     public function GetNickname() {
         return $this->nickname;
     }

     public function GetPassword() {
         return $this->password;
     }

     public function VerifyLogins($login, $password) { // Verify the format of the login/password
         $errors = '';
         // We start by verifying the nickname
         if(!preg_match("#^[^(\^\\/*\+\-)]{".self::NICKNAME_MINLENGTH.",".self::NICKNAME_MAXLENGTH."}$#", $login))
         {
             $errors .= 'The nickname is incorrect.<br />';
         }
         // We verify the password
         if(!preg_match("#^[.]{".self::PASSWORD_MINLENGTH.",".self::PASSWORD_MAXLENGTH."}$#", $password))
         {
             $errors .= 'The password is incorrect.<br />';
         }
         // Now if the $errors variable is not empty then there is an error
         if($errors == '')
         {
             return false;
         }
         else
         {
             return true;
         }
     }

     public function AddUser($login, $password) { // Add a new user to the database
         global $PA; // To access the PDO variable
         // First we need to verify the logins
         if($this->VerifyLogins($login, $password))
         {
             // Now that we are sure about the validity of the logins, we can add the user to the dabase
             $PA->prepare('INSERT INTO ') or die($PA->error);
             $PA->execute();
         }
     }
}
?>