class.ilChatroomClearGUI.php

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<?php

declare(strict_types=1);

class ilChatroomClearGUI extends ilChatroomGUIHandler
{
    public function executeDefault(string $requestedMethod): void
    {
        $this->redirectIfNoPermission('moderate');

        $room = $this->getRoomByObjectId($this->gui->getObject()->getId());
        $this->exitIfNoRoomExists($room);

        $chat_user = new ilChatroomUser($this->ilUser, $room);
        $subRoomId = $this->getRequestValue('sub', $this->refinery->kindlyTo()->int());

        $room->clearMessages($subRoomId);

        $connector = $this->gui->getConnector();
        $response = $connector->sendClearMessages($room->getRoomId(), $subRoomId, $chat_user->getUserId());

        $this->sendResponse($response);
    }
}