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RedirectSpecialArticle.php
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RedirectSpecialArticle.php
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<?php
/**
* @license GPL-2.0-or-later
* @file
*/
namespace MediaWiki\SpecialPage;
use MediaWiki\Title\Title;
/**
* Helper for any RedirectSpecialPage which redirects the user
* to a particular article (as opposed to user contributions, logs, etc.).
*
* This is used by subclasses to create user-independent URLs pointing to
* pages about the current user (user page, talk page, contributions, etc.).
* This can let us link it statically and cache-safe within wikitext,
* e.g. on help pages.
*
* For security reasons these special pages are restricted to only preserve
* the following subset of GET parameters to the target page, while
* removing and/or ignoring all others.
*
* - useskin, uselang, printable: to alter the appearance of the resulting page
*
* - redirect: allows viewing one's user page or talk page even if it is a
* redirect.
*
* - rdfrom: allows redirecting to one's user page or talk page from an
* external wiki with the "Redirect from..." notice.
*
* - limit, offset: Useful for linking to history of one's own user page or
* user talk page. For example, this would be a link to "the last edit to your
* user talk page in the year 2010":
* https://en.wikipedia.org/wiki/Special:MyPage?offset=20110000000000&limit=1&action=history
*
* - feed: would allow linking to the current user's RSS feed for their user
* talk page:
* https://en.wikipedia.org/w/index.php?title=Special:MyTalk&action=history&feed=rss
*
* - preloadtitle: Can be used to provide a default section title for a
* preloaded new comment on one's own talk page.
*
* - summary : Can be used to provide a default edit summary for a preloaded
* edit to one's own user page or talk page.
*
* - preview: Allows showing/hiding preview on first edit regardless of user
* preference, useful for preloaded edits where you know preview wouldn't be
* useful.
*
* - redlink: Affects the message the user sees if their talk page/user talk
* page does not currently exist. Avoids confusion for newbies with no user
* pages over why they got a "permission error" following this link:
* https://en.wikipedia.org/w/index.php?title=Special:MyPage&redlink=1
*
* - debug: determines whether the debug parameter is passed to load.php,
* which disables reformatting and allows scripts to be debugged. Useful
* when debugging scripts that manipulate one's own user page or talk page.
*
* @par Hook extension:
* Extensions can add to the redirect parameters list by using the hook
* RedirectSpecialArticleRedirectParams
*
* This hook allows extensions which add GET parameters like FlaggedRevs to
* retain those parameters when redirecting using special pages.
*
* @par Hook extension example:
* @code
* $wgHooks['RedirectSpecialArticleRedirectParams'][] =
* 'MyExtensionHooks::onRedirectSpecialArticleRedirectParams';
* public static function onRedirectSpecialArticleRedirectParams( &$redirectParams ) {
* $redirectParams[] = 'stable';
* return true;
* }
* @endcode
*
* @stable to extend
* @ingroup SpecialPage
*/
abstract class RedirectSpecialArticle extends RedirectSpecialPage {
/**
* @stable to call
*
* @param string $name
*/
public function __construct( $name ) {
parent::__construct( $name );
$redirectParams = [
'action',
'redirect', 'rdfrom',
# Options for preloaded edits
'preload', 'preloadparams', 'editintro', 'preloadtitle', 'summary', 'nosummary',
# Options for overriding user settings
'preview', 'minor', 'watchthis',
# Options for history/diffs
'section', 'oldid', 'diff', 'dir',
'limit', 'offset', 'feed',
# Misc options
'redlink',
# Options for action=raw; missing ctype can break JS or CSS in some browsers
'ctype', 'maxage', 'smaxage',
];
$this->getHookRunner()->onRedirectSpecialArticleRedirectParams( $redirectParams );
$this->mAllowedRedirectParams = $redirectParams;
}
/**
* @inheritDoc
*/
public function getRedirectQuery( $subpage ) {
$query = parent::getRedirectQuery( $subpage );
$title = $this->getRedirect( $subpage );
// Avoid double redirect for action=edit&redlink=1 for existing pages
// (compare to the check in EditPage::edit)
if (
$query && isset( $query['action'] ) && isset( $query['redlink'] ) &&
( $query['action'] === 'edit' || $query['action'] === 'submit' ) &&
(bool)$query['redlink'] &&
$title instanceof Title &&
$title->exists()
) {
return false;
}
return $query;
}
}
/** @deprecated class alias since 1.41 */
class_alias( RedirectSpecialArticle::class, 'RedirectSpecialArticle' );

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