<?php

 require_once 'connection.php';
 header('Content-Type: application/json ');

class User {

    private $db;
    private $connection;

    function _construct() {
        $this->db = new DB_connection();
        $this->connection = $this->db->get_connection();
    }

    public function does_user_exist($username,$password) {

        $query = "Select * from users where username = '$username' and password = '$password' ";
        $result = mysqli_query($this->connection, $query);
        if(mysqli_num_rows($result) > 0) {
            $json['success'] = ' Welcome ' .$username;
            echo json_encode($json);
            mysqli_close($this->connection);

        } else {

            $query = "Insert into users(username,password) values ('$username',$password');"
            $is_inserted = mysqli_query($this->connection, $query);
            if ($is_inserted == 1) {
                $json['success'] = ' Account created, welcome '.$username;

            } else {
                $json['error'] = ' Wrong Password ';

            }
            echo json_encode($json);
            mysqli_close($this->connection);
        }
    }
}

$user = new User();
if (isset($_POST['username'],$_POST['password'])) {
    $username = $_POST['username'];
    $username = $_POST['password'];

    if (!empty($username) && !empty($password)) {

        $encrypted_password = md5($password);
        $user -> does_user_exist($username,$encrypted_password);

    } else {
        echo json_encode(" You must fill both fields ");

    }


}


?>