BLOG/unsubscribe.php at main · Manasess896/BLOG · GitHub

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<?php
require_once 'vendor/autoload.php';
$dotenv = Dotenv\Dotenv::createImmutable(__DIR__);
$dotenv->safeLoad();

use MongoDB\Client;
use MongoDB\BSON\UTCDateTime;

$message = '';
$isError = false;

$token = $_GET['token'] ?? '';
$token = preg_replace('/[^a-f0-9]/', '', $token);

if (empty($token)) {
    $message = "Invalid or missing unsubscribe token.";
    $isError = true;
} else {
    try {
        $url = $_ENV['MONGODB_URI'] ?? getenv('MONGODB_URI');
        $mydatabase = $_ENV['MONGODB_DATABASE'] ?? getenv('MONGODB_DATABASE');
        $client = new Client($url);
        $subscribers = $client->selectCollection($mydatabase, 'subscribers');

        $result = $subscribers->findOneAndUpdate(
            ['unsubscribe_token' => $token],
            ['$set' => ['unsubscribed' => true, 'updated_at' => new UTCDateTime()]],
            ['returnDocument' => MongoDB\Operation\FindOneAndUpdate::RETURN_DOCUMENT_AFTER]
        );

        if ($result) {
            $message = "You have been successfully unsubscribed from our newsletter. You will no longer receive newsletter emails.";
        } else {
            $message = "No active subscription found for this token.";
            $isError = true;
        }
    } catch (Exception $e) {
        $message = "An error occurred. Please try again later.";
        $isError = true;
    }
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Unsubscribe</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body class="bg-light">
    <div class="container mt-5" style="max-width: 500px;">
        <div class="card p-4 text-center shadow-sm">
            <h2 class="mb-3">Unsubscribe</h2>
            <div class="alert <?= $isError ? 'alert-warning' : 'alert-success' ?>">
                <?= htmlspecialchars($message) ?>
            </div>
            <p class="mt-3 font-size-13 text-muted">If you did not request this, you can safely ignore this message.</p>
            <a href="index.php" class="btn btn-primary mt-3">Return to Home</a>
        </div>
    </div>
</body>
</html>