<?php
class Config{
    public static $dbhost = "localhost";
    public static $dbuser = "root";
    public static $dbpass = "";
    public static $dbdata = "Skyhigh";
}
global $con;
$con = new mysqli(Config::$dbhost, Config::$dbuser, Config::$dbpass, Config::$dbdata);
if($con->connect_errno)
{
    printf("Connect failed: %s\n", $con->connect_error);
    die("ERROR");
}

$action = $_GET['action'];

class User{
    private $con;
    private $username;
    private $password;
    private $newpassword;
    public function __construct($user, $pass, $newpass) {
       $username = $user;
       $password = $pass;
       $newpassword = $newpass;
   }
   public function exists(){
       $result = $con->query("SELECT ID FROM users WHERE username = " . $username);
       if ($result->num_rows == 0 )
       {
           return 1;
       } else if($result->num_rows == 1)
       {
           return 0;
       } else
       {
           return -1;
       }
   }
   public function login()
   {
       $result = $con->query("SELECT passhash FROM users WHERE username = " . $username);
       while($row = $result->fetch_object()){
            $hash =$row->passhash;
       }
       if (password_verify($password, $hash))
       {
           return 1;
       }else
       {
           return 0;
       }
   }
   public function register()
   {
       if(($password == $newpassword))
       {
           $hash = password_hash($password, PASSWORD_DEFAULT);
       }
       if($query = $con->query("INSERT INTO users (username,passhash) VALUES ('$username','$hash')"))
        {
            echo "1";
        }
        else
        {
            echo "0";
        }
   }
}

$name = $con->real_escape_string($_GET['username']);
$pass1 = $con->real_escape_string($_GET['password']);
$pass2 = $con->real_escape_string($_GET['newpassword']);


$user = new User($username, $pass1, $pass2);

switch ($action)
{
    case "register":
        if (!$user->exists())
            echo $user->register();
        break;
    case "login":
        if($user->exists())
            echo $user->login();
        break;
    default:
        echo "Please enter an action.";

}