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<?php
/**
* 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.
* http://www.gnu.org/copyleft/gpl.html
*
* @author Daniel Friesen
* @file
*/
namespace MediaWiki\Context;
use MediaWiki\Config\Config;
use MediaWiki\Language\Language;
use MediaWiki\MediaWikiServices;
use MediaWiki\Message\Message;
use MediaWiki\Output\OutputPage;
use MediaWiki\Page\WikiPage;
use MediaWiki\Permissions\Authority;
use MediaWiki\Request\WebRequest;
use MediaWiki\Session\CsrfTokenSet;
use MediaWiki\Skin\Skin;
use MediaWiki\Title\Title;
use MediaWiki\User\User;
use Wikimedia\Assert\Assert;
use Wikimedia\Message\MessageParam;
use Wikimedia\Message\MessageSpecifier;
use Wikimedia\Timing\Timing;
/**
* An IContextSource implementation which will inherit context from another source
* but allow individual pieces of context to be changed locally
* eg: A ContextSource that can inherit from the main RequestContext but have
* a different Title instance set on it.
* @newable
* @since 1.19
*/
class DerivativeContext extends ContextSource implements MutableContext {
/**
* @var WebRequest
*/
private $request;
/**
* @var Title
*/
private $title;
/**
* @var WikiPage
*/
private $wikipage;
/**
* @var string|null|false
*/
private $action = false;
/**
* @var OutputPage
*/
private $output;
/**
* @var User|null
*/
private $user;
/**
* @var Authority
*/
private $authority;
/**
* @var Language
*/
private $lang;
/**
* @var Skin
*/
private $skin;
/**
* @var Config
*/
private $config;
/**
* @var Timing
*/
private $timing;
/**
* @stable to call
* @param IContextSource $context Context to inherit from
*/
public function __construct( IContextSource $context ) {
$this->setContext( $context );
}
public function setConfig( Config $config ) {
$this->config = $config;
}
/**
* @return Config
*/
public function getConfig() {
return $this->config ?: $this->getContext()->getConfig();
}
/**
* @return Timing
*/
public function getTiming() {
return $this->timing ?: $this->getContext()->getTiming();
}
public function setRequest( WebRequest $request ) {
$this->request = $request;
}
/**
* @return WebRequest
*/
public function getRequest() {
return $this->request ?: $this->getContext()->getRequest();
}
public function getCsrfTokenSet(): CsrfTokenSet {
return new CsrfTokenSet( $this->getRequest() );
}
public function setTitle( Title $title ) {
$this->title = $title;
$this->action = null;
}
/**
* @return Title|null
*/
public function getTitle() {
return $this->title ?: $this->getContext()->getTitle();
}
/**
* Check whether a WikiPage object can be get with getWikiPage().
* Callers should expect that an exception is thrown from getWikiPage()
* if this method returns false.
*
* @since 1.19
* @return bool
*/
public function canUseWikiPage() {
if ( $this->wikipage !== null ) {
return true;
}
if ( $this->title !== null ) {
return $this->title->canExist();
}
return $this->getContext()->canUseWikiPage();
}
/**
* @since 1.19
* @param WikiPage $wikiPage
*/
public function setWikiPage( WikiPage $wikiPage ) {
$pageTitle = $wikiPage->getTitle();
if ( !$this->title || !$pageTitle->equals( $this->title ) ) {
$this->setTitle( $pageTitle );
}
$this->wikipage = $wikiPage;
$this->action = null;
}
/**
* Get the WikiPage object.
* May throw an exception if there's no Title object set or the Title object
* belongs to a special namespace that doesn't have WikiPage, so use first
* canUseWikiPage() to check whether this method can be called safely.
*
* @since 1.19
* @return WikiPage
*/
public function getWikiPage() {
if ( !$this->wikipage && $this->title ) {
$this->wikipage = MediaWikiServices::getInstance()->getWikiPageFactory()->newFromTitle( $this->title );
}
return $this->wikipage ?: $this->getContext()->getWikiPage();
}
/**
* @since 1.38
* @param string $action
*/
public function setActionName( string $action ): void {
$this->action = $action;
}
/**
* Get the action name for the current web request.
*
* @since 1.38
* @return string Action
*/
public function getActionName(): string {
if ( $this->action === false ) {
return $this->getContext()->getActionName();
}
$this->action ??= MediaWikiServices::getInstance()
->getActionFactory()
->getActionName( $this );
return $this->action;
}
public function setOutput( OutputPage $output ) {
$this->output = $output;
}
/**
* @return OutputPage
*/
public function getOutput() {
return $this->output ?: $this->getContext()->getOutput();
}
public function setUser( User $user ) {
$this->authority = $user;
$this->user = $user;
}
/**
* @return User
*/
public function getUser() {
if ( !$this->user && $this->authority ) {
// Keep user consistent by using a possible set authority
$this->user = MediaWikiServices::getInstance()
->getUserFactory()
->newFromAuthority( $this->authority );
}
return $this->user ?: $this->getContext()->getUser();
}
public function setAuthority( Authority $authority ) {
$this->authority = $authority;
// If needed, a User object is constructed from this authority
$this->user = null;
}
/**
* @since 1.36
* @return Authority
*/
public function getAuthority(): Authority {
return $this->authority ?: $this->getContext()->getAuthority();
}
/**
* @param Language|string $language Language instance or language code
* @since 1.19
*/
public function setLanguage( $language ) {
Assert::parameterType( [ Language::class, 'string' ], $language, '$language' );
if ( $language instanceof Language ) {
$this->lang = $language;
} else {
$language = RequestContext::sanitizeLangCode( $language );
$obj = MediaWikiServices::getInstance()->getLanguageFactory()->getLanguage( $language );
$this->lang = $obj;
}
}
/**
* @return Language
* @since 1.19
*/
public function getLanguage() {
return $this->lang ?: $this->getContext()->getLanguage();
}
public function setSkin( Skin $skin ) {
$this->skin = clone $skin;
$this->skin->setContext( $this );
}
/**
* @return Skin
*/
public function getSkin() {
return $this->skin ?: $this->getContext()->getSkin();
}
/**
* Get a message using the current context.
*
* This can't just inherit from ContextSource, since then
* it would set only the original context, and not take
* into account any changes.
*
* @param string|string[]|MessageSpecifier $key Message key, or array of keys,
* or a MessageSpecifier.
* @phpcs:ignore Generic.Files.LineLength
* @param MessageParam|MessageSpecifier|string|int|float|list<MessageParam|MessageSpecifier|string|int|float> ...$params
* See Message::params()
* @return Message
*/
public function msg( $key, ...$params ) {
// phpcs:ignore MediaWiki.Usage.ExtendClassUsage.FunctionVarUsage
return wfMessage( $key, ...$params )->setContext( $this );
}
}
/** @deprecated class alias since 1.42 */
class_alias( DerivativeContext::class, 'DerivativeContext' );