Gazelle/classes/mass_user_bookmarks_editor....

<?php
#declare(strict_types=1);

//require_once 'mass_user_torrents_editor.class.php';

/**
 * This class helps with mass-editing bookmarked torrents.
 *
 * It can later be used for other bookmark tables.
 *
 */
class MASS_USER_BOOKMARKS_EDITOR extends MASS_USER_TORRENTS_EDITOR
{
    public function __construct($Table = 'bookmarks_torrents')
    {
        $this->set_table($Table);
    }

    /**
     * Runs a SQL query and clears the Cache key
     *
     * G::$Cache->delete_value didn't always work, but setting the key to null, did. (?)
     *
     * @param string $sql
     */
    protected function query_and_clear_cache($sql)
    {
        $QueryID = G::$DB->get_query_id();
        if (is_string($sql) && G::$DB->query($sql)) {
            G::$Cache->delete_value('bookmarks_group_ids_' . G::$LoggedUser['ID']);
        }
        G::$DB->set_query_id($QueryID);
    }

    /**
     * Uses (checkboxes) $_POST['remove'] to delete entries.
     *
     * Uses an IN() to match multiple items in one query.
     */
    public function mass_remove()
    {
        $SQL = [];
        foreach ($_POST['remove'] as $GroupID => $K) {
            if (is_number($GroupID)) {
                $SQL[] = sprintf('%d', $GroupID);
            }
        }

        if (!empty($SQL)) {
            $SQL = sprintf(
                '
            DELETE FROM %s
              WHERE UserID = %d
              AND GroupID IN (%s)',
                $this->Table,
                G::$LoggedUser['ID'],
                implode(', ', $SQL)
            );
            $this->query_and_clear_cache($SQL);
        }
    }

    /**
     * Uses $_POST['sort'] values to update the DB.
     */
    public function mass_update()
    {
        $SQL = [];
        foreach ($_POST['sort'] as $GroupID => $Sort) {
            if (is_number($Sort) && is_number($GroupID)) {
                $SQL[] = sprintf('(%d, %d, %d)', $GroupID, $Sort, G::$LoggedUser['ID']);
            }
        }

        if (!empty($SQL)) {
            $SQL = sprintf(
                '
            INSERT INTO %s
              (GroupID, Sort, UserID)
            VALUES
              %s
            ON DUPLICATE KEY UPDATE
              Sort = VALUES (Sort)',
                $this->Table,
                implode(', ', $SQL)
            );
            $this->query_and_clear_cache($SQL);
        }
    }
}