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<?php
/*
 *  GNUfault.org - GNUfault's website
 *  Copyright (C) 2026  Connor Thomson
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

define('ROOT', rtrim($_SERVER['DOCUMENT_ROOT'], '/') . '/');

require_once ROOT . '/php/session.php';

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $username        = $_POST['username'];
    $password        = $_POST['password'];
    $confirmpassword = $_POST['confirmpassword'];
    $email           = $_POST['email'];

    if ($confirmpassword != $password) {
        echo "Passwords do not match!";
        exit;
    }

    $hashed_password = password_hash($password, PASSWORD_DEFAULT);

    $code    = rand(1000, 9999);

    $host    = '127.0.0.1';
    $db      = 'gnufaultdb';
    $db_user = 'gnufaultdb_user';
    $pass    = trim(file_get_contents('/etc/gnufault.d/password'));

    $charset = 'utf8mb4';
    $dsn     = "mysql:host=$host;dbname=$db;charset=$charset";

    $options = [
        PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
        PDO::ATTR_EMULATE_PREPARES   => false,
    ];

    try {
        $pdo = new PDO($dsn, $db_user, $pass, $options);
    } catch (\PDOException $e) {
        throw new \PDOException($e->getMessage(), (int)$e->getCode());
    }

    try {
        $sql = "INSERT INTO users (username, email, password, verification_code) VALUES (:username, :email, :password, :code)";
        $stmt = $pdo->prepare($sql);
        $stmt->execute([
            'username' => $username,
            'email'    => $email,
            'password' => $hashed_password,
            'code'     => $code
        ]);

        $user_id = $pdo->lastInsertId();

        set_user_id((int)$user_id);
    } catch (\PDOException $e) {
        if ($e->getCode() == 23000) {
            echo "Error: Username or email is already taken.";
        } else {
            echo "Error: " . $e->getMessage();
        }
        exit;
    }

    $subject = "GNUfault.org Verification Code";

    $headers = "From: noreply@gnufault.org" . "\r\n" .
               "Reply-To: noreply@gnufault.org" . "\r\n" .
               "X-Mailer: PHP/" . phpversion();

    if (mail($email, $subject, $code, $headers)) {
        header("Location: verify");
    } else {
        echo "Failed to send";
        exit;
    }
}
?>