Merge "SpecialBlock [Vue]: add NamespacesField and PagesField components"
[mediawiki.git] / includes / actions / FormlessAction.php
bloba31ba4ada1b129eab38b1a10099ea0c76f5dd05b
1 <?php
2 /**
3 * Base classes for actions done on pages.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
19 * @file
20 * @ingroup Actions
23 /**
24 * An action which just does something, without showing a form first.
26 * @stable to extend
28 * @ingroup Actions
30 abstract class FormlessAction extends Action {
32 /**
33 * Show something on GET request.
34 * @return string|null Will be added to the HTMLForm if present, or just added to the
35 * output if not. Return null to not add anything
37 abstract public function onView();
39 /**
40 * @stable to override
42 public function show() {
43 $this->setHeaders();
45 // This will throw exceptions if there's a problem
46 $this->checkCanExecute( $this->getUser() );
48 $this->getOutput()->addHTML( $this->onView() );