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<?php
require_once('functions.php');
dbConnect('localhost', 'root', '', 'website');
session_start();

if(isset($_POST['submit'])){
    if(isset($_POST['username'], $_POST['password'])) {
    $username = $_POST['username'];
    $password = $_POST['password'];
    $errors = array();

    if(empty($username)) {
        $errors[] = "Please enter a username.";
    }

    if(empty($password)) {
        $errors[] = "Please enter a password.";
    }

    if(strlen($username) <= 3) {
        $errors[] = "Please make sure your username is 4 or more characters long.";
    }

    if(strlen($password) <= 4) {
        $errors[] = "Please make sure your password is 5 or more characters long.";
    }

    if(count($errors)) {
        echo "The following errors occured:";
        foreach($errors AS $error) {
            echo $error."<br/>";
        }
    }else {
        $sql = "SELECT `username` FROM `users` WHERE `username` = '$username'";
        $res = mysql_query($sql);
        $count = mysql_fetch_row($res);
        if($count  < 0) {
            //Insert the user into the db as the given username is available.
            $insertMember = "INSERT INTO `users` (username, password) VALUES ({$username}, {$password})";
            $addMember = mysql_query($sql) or die(mysql_error());
            header("Refrehs: 5;url=login.php");
            echo "You have successfully registered, redirecting you to the login page.";
        }  else {
            echo "Sorry but the given username is not available.";
        }
    }
  }
}

?>

<html>
    <head>
        <title> Register </title>
    </head>
    <body>
        <form method="POST" action="<?php $_SERVER['PHP_SELF']; ?>">
            <p> Username: <input type="username" name="username" /> </p>
            <p> Password: <input type="password" name="password" /> </p>
            <input type="submit" name="submit" value="Register" />
        </form>
    </body>
</html>