fuer WooCommerce
SEPA QR-Codes

<?php
/**
 * GiroCode Integration fuer WooCommerce
 * Fuegt SEPA QR-Code zu Rechnungen hinzu
 */

// API-Konfiguration
define('GIROCODE_API_URL', 'https://api.girocode-api.de/generate');
define('GIROCODE_USER', 'ihr_username');
define('GIROCODE_SECRET', 'ihr_api_secret');

/**
 * GiroCode fuer eine Bestellung generieren
 */
function generate_girocode_for_order($order_id) {
    $order = wc_get_order($order_id);

    $params = [
        'user' => GIROCODE_USER,
        'secret' => GIROCODE_SECRET,
        'iban' => 'DE89370400440532013000',
        'paymentrecipient' => 'Ihre Firma GmbH',
        'purpose' => 'Bestellung ' . $order->get_order_number(),
        'amount' => $order->get_total(),
        'imageformat' => 'png',
        'dimension' => '256',
        'output' => 'json'
    ];

    $response = wp_remote_post(GIROCODE_API_URL, [
        'body' => json_encode($params),
        'headers' => ['Content-Type' => 'application/json'],
        'timeout' => 30
    ]);

    if (is_wp_error($response)) {
        return false;
    }

    $body = json_decode(wp_remote_retrieve_body($response), true);

    if ($body['success'] && isset($body['data']['data'])) {
        return $body['data']['data']; // Data URL fuer <img src="">
    }

    return false;
}

/**
 * GiroCode in E-Mail-Rechnungen einfuegen
 */
add_action('woocommerce_email_after_order_table', function($order, $sent_to_admin, $plain_text, $email) {
    // Nur bei Kunden-Rechnungen
    if ($email->id !== 'customer_invoice') return;
    if ($plain_text) return;

    $qr_code = generate_girocode_for_order($order->get_id());

    if ($qr_code) {
        echo '<div style="text-align: center; margin: 20px 0;">';
        echo '<h3>Schnell bezahlen mit GiroCode</h3>';
        echo '<p>Scannen Sie den QR-Code mit Ihrer Banking-App:</p>';
        echo '<img src="' . esc_attr($qr_code) . '" alt="GiroCode" style="max-width: 200px;" />';
        echo '</div>';
    }
}, 10, 4);
?>