public function ajaxProcessMarkAsRead()
 {
     if ($this->tabAccess['edit'] != '1') {
         throw new PrestaShopException(Tools::displayError('You do not have permission to edit this.'));
     }
     $id_thread = Tools::getValue('id_thread');
     $messages = CustomerThread::getMessageCustomerThreads($id_thread);
     if (count($messages)) {
         Db::getInstance()->execute('UPDATE `' . _DB_PREFIX_ . 'customer_message` set `read` = 1 WHERE `id_employee` = ' . (int) $this->context->employee->id . ' AND `id_customer_thread` = ' . (int) $id_thread);
     }
 }
 public function ajaxProcessMarkAsRead()
 {
     $id_thread = Tools::getValue('id_thread');
     $messages = CustomerThread::getMessageCustomerThreads($id_thread);
     if (count($messages)) {
         Db::getInstance()->execute('UPDATE ' . _DB_PREFIX_ . 'customer_message set `read` = 1');
     }
 }