query("SELECT * FROM voucher_templates"); return $stmt->fetchAll(); } public function getAllByRouterId($routerId) { $db = Database::getInstance(); $stmt = $db->query("SELECT * FROM voucher_templates WHERE router_id = ?", [$routerId]); return $stmt->fetchAll(); } public function getById($id) { $db = Database::getInstance(); $stmt = $db->query("SELECT * FROM voucher_templates WHERE id = ?", [$id]); return $stmt->fetch(); } public function add($data) { $db = Database::getInstance(); $sql = "INSERT INTO voucher_templates (router_id, session_name, name, content) VALUES (?, ?, ?, ?)"; return $db->query($sql, [ $data['router_id'], $data['session_name'], $data['name'], $data['content'] ]); } public function update($id, $data) { $db = Database::getInstance(); $sql = "UPDATE voucher_templates SET name=?, content=?, updated_at=CURRENT_TIMESTAMP WHERE id=?"; return $db->query($sql, [ $data['name'], $data['content'], $id ]); } public function delete($id) { $db = Database::getInstance(); return $db->query("DELETE FROM voucher_templates WHERE id = ?", [$id]); } }