uninstall.php

<?php

// Delete Media Manager media types
$sql = rex_sql::factory();
$sql->setQuery('SELECT id FROM '. \rex::getTablePrefix() ."media_manager_type WHERE name = 'd2u_helper_yfeed_small'");
if ($sql->getRows() > 0) {
    $id = $sql->getValue('id');
    $sql->setQuery('DELETE FROM '. \rex::getTablePrefix() .'media_manager_type_effect WHERE `type_id` = '. $id);
    $sql->setQuery('DELETE FROM '. \rex::getTablePrefix() .'media_manager_type WHERE `type_id` = '. $id);
}
$sql->setQuery('SELECT id FROM '. \rex::getTablePrefix() ."media_manager_type WHERE name = 'd2u_helper_yfeed_large'");
if ($sql->getRows() > 0) {
    $id = $sql->getValue('id');
    $sql->setQuery('DELETE FROM '. \rex::getTablePrefix() .'media_manager_type_effect WHERE `type_id` = '. $id);
    $sql->setQuery('DELETE FROM '. \rex::getTablePrefix() .'media_manager_type WHERE `type_id` = '. $id);
}

// Delete Metainfo fields
rex_metainfo_delete_field('art_file');
rex_metainfo_delete_field('art_slogan');
rex_metainfo_delete_field('cat_d2u_helper_icon');
rex_metainfo_delete_field('clang_icon');

// Delete language replacements
if (!class_exists(\TobiasKrais\D2UHelper\LangHelper::class)) {
    // Load class in case addon is deactivated
    require_once 'lib/ALangHelper.php';
    require_once 'lib/LangHelper.php';
}
\TobiasKrais\D2UHelper\LangHelper::factory()->uninstall();