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<?php
/**
* Base classes for actions done on pages.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*
* @file
* @ingroup Actions
*/
/**
* An action which just does something, without showing a form first.
*
* @ingroup Actions
*/
abstract class FormlessAction extends Action {
/**
* Show something on GET request.
* @return string|null Will be added to the HTMLForm if present, or just added to the
* output if not. Return null to not add anything
*/
abstract public function onView();
public function show() {
$this->setHeaders();
// This will throw exceptions if there's a problem
$this->checkCanExecute( $this->getUser() );
$this->getOutput()->addHTML( $this->onView() );
}
}
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