boot.php

<?php

if (rex_addon::get('yform')->isAvailable() && !rex::isSafeMode()) {
    rex_yform_manager_dataset::setModelClass(
        'rex_staff',
        staff::class,
    );
    rex_yform_manager_dataset::setModelClass(
        'rex_staff_category',
        staff_category::class,
    );
}

if (rex::isBackend() && 'staff/person' == rex_be_controller::getCurrentPage() || 'yform/manager/data_edit' == rex_be_controller::getCurrentPage()) {
    rex_extension::register('OUTPUT_FILTER', static function (rex_extension_point $ep) {
        $suchmuster = 'class="###staff-settings-editor###"';
        $ersetzen = rex_config::get('staff', 'editor');
        $ep->setSubject(str_replace($suchmuster, $ersetzen, $ep->getSubject()));
    });
}

if (rex::isBackend() && rex_addon::get('staff') && rex_addon::get('staff')->isAvailable() && !rex::isSafeMode()) {
    $addon = rex_addon::get('staff');
    $page = $addon->getProperty('page');

    if (rex::isBackend() && !empty($_REQUEST)) {
        $_csrf_key = rex_yform_manager_table::get('rex_staff')->getCSRFKey();

        $token = rex_csrf_token::factory($_csrf_key)->getUrlParams();

        $params = [];
        $params['table_name'] = 'rex_staff'; // Tabellenname anpassen
        $params['rex_yform_manager_popup'] = '0';
        $params['_csrf_token'] = $token['_csrf_token'];
        $params['func'] = 'add';

        $href = rex_url::backendPage('staff/person', $params);

        $page['title'] .= ' <a class="label label-primary tex-primary" style="position: absolute; right: 18px; top: 10px; padding: 0.2em 0.6em 0.3em; border-radius: 3px; color: white; display: inline; width: auto;" href="' . $href . '">+</a>';
        $addon->setProperty('page', $page);
    }
}