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<?php
/**
* Context for ResourceLoader modules.
*
* 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
*
* @file
* @author Trevor Parscal
* @author Roan Kattouw
*/
use MediaWiki\Logger\LoggerFactory;
/**
* Object passed around to modules which contains information about the state
* of a specific loader request
*/
class ResourceLoaderContext {
protected $resourceLoader;
protected $request;
protected $logger;
// Module content vary
protected $skin;
protected $language;
protected $debug;
protected $user;
// Request vary (in addition to cache vary)
protected $modules;
protected $only;
protected $version;
protected $raw;
protected $image;
protected $variant;
protected $format;
protected $direction;
protected $hash;
protected $userObj;
protected $imageObj;
/**
* @param ResourceLoader $resourceLoader
* @param WebRequest $request
*/
public function __construct( ResourceLoader $resourceLoader, WebRequest $request ) {
$this->resourceLoader = $resourceLoader;
$this->request = $request;
$this->logger = $resourceLoader->getLogger();
// List of modules
$modules = $request->getVal( 'modules' );
$this->modules = $modules ? self::expandModuleNames( $modules ) : [];
// Various parameters
$this->user = $request->getVal( 'user' );
$this->debug = $request->getFuzzyBool(
'debug',
$resourceLoader->getConfig()->get( 'ResourceLoaderDebug' )
);
$this->only = $request->getVal( 'only', null );
$this->version = $request->getVal( 'version', null );
$this->raw = $request->getFuzzyBool( 'raw' );
// Image requests
$this->image = $request->getVal( 'image' );
$this->variant = $request->getVal( 'variant' );
$this->format = $request->getVal( 'format' );
$this->skin = $request->getVal( 'skin' );
$skinnames = Skin::getSkinNames();
// If no skin is specified, or we don't recognize the skin, use the default skin
if ( !$this->skin || !isset( $skinnames[$this->skin] ) ) {
$this->skin = $resourceLoader->getConfig()->get( 'DefaultSkin' );
}
}
/**
* Expand a string of the form jquery.foo,bar|jquery.ui.baz,quux to
* an array of module names like array( 'jquery.foo', 'jquery.bar',
* 'jquery.ui.baz', 'jquery.ui.quux' )
* @param string $modules Packed module name list
* @return array Array of module names
*/
public static function expandModuleNames( $modules ) {
$retval = [];
$exploded = explode( '|', $modules );
foreach ( $exploded as $group ) {
if ( strpos( $group, ',' ) === false ) {
// This is not a set of modules in foo.bar,baz notation
// but a single module
$retval[] = $group;
} else {
// This is a set of modules in foo.bar,baz notation
$pos = strrpos( $group, '.' );
if ( $pos === false ) {
// Prefixless modules, i.e. without dots
$retval = array_merge( $retval, explode( ',', $group ) );
} else {
// We have a prefix and a bunch of suffixes
$prefix = substr( $group, 0, $pos ); // 'foo'
$suffixes = explode( ',', substr( $group, $pos + 1 ) ); // array( 'bar', 'baz' )
foreach ( $suffixes as $suffix ) {
$retval[] = "$prefix.$suffix";
}
}
}
}
return $retval;
}
/**
* Return a dummy ResourceLoaderContext object suitable for passing into
* things that don't "really" need a context.
* @return ResourceLoaderContext
*/
public static function newDummyContext() {
return new self( new ResourceLoader(
ConfigFactory::getDefaultInstance()->makeConfig( 'main' ),
LoggerFactory::getInstance( 'resourceloader' )
), new FauxRequest( [] ) );
}
/**
* @return ResourceLoader
*/
public function getResourceLoader() {
return $this->resourceLoader;
}
/**
* @return WebRequest
*/
public function getRequest() {
return $this->request;
}
/**
* @since 1.27
* @return \Psr\Log\LoggerInterface
*/
public function getLogger() {
return $this->logger;
}
/**
* @return array
*/
public function getModules() {
return $this->modules;
}
/**
* @return string
*/
public function getLanguage() {
if ( $this->language === null ) {
// Must be a valid language code after this point (T64849)
// Only support uselang values that follow built-in conventions (T102058)
$lang = $this->getRequest()->getVal( 'lang', '' );
// Stricter version of RequestContext::sanitizeLangCode()
if ( !Language::isValidBuiltInCode( $lang ) ) {
wfDebug( "Invalid user language code\n" );
global $wgLanguageCode;
$lang = $wgLanguageCode;
}
$this->language = $lang;
}
return $this->language;
}
/**
* @return string
*/
public function getDirection() {
if ( $this->direction === null ) {
$this->direction = $this->getRequest()->getVal( 'dir' );
if ( !$this->direction ) {
// Determine directionality based on user language (bug 6100)
$this->direction = Language::factory( $this->getLanguage() )->getDir();
}
}
return $this->direction;
}
/**
* @return string
*/
public function getSkin() {
return $this->skin;
}
/**
* @return string|null
*/
public function getUser() {
return $this->user;
}
/**
* Get a Message object with context set. See wfMessage for parameters.
*
* @since 1.27
* @param mixed ...
* @return Message
*/
public function msg() {
return call_user_func_array( 'wfMessage', func_get_args() )
->inLanguage( $this->getLanguage() );
}
/**
* Get the possibly-cached User object for the specified username
*
* @since 1.25
* @return User|bool false if a valid object cannot be created
*/
public function getUserObj() {
if ( $this->userObj === null ) {
$username = $this->getUser();
if ( $username ) {
$this->userObj = User::newFromName( $username );
} else {
$this->userObj = new User; // Anonymous user
}
}
return $this->userObj;
}
/**
* @return bool
*/
public function getDebug() {
return $this->debug;
}
/**
* @return string|null
*/
public function getOnly() {
return $this->only;
}
/**
* @see ResourceLoaderModule::getVersionHash
* @see OutputPage::makeResourceLoaderLink
* @return string|null
*/
public function getVersion() {
return $this->version;
}
/**
* @return bool
*/
public function getRaw() {
return $this->raw;
}
/**
* @return string|null
*/
public function getImage() {
return $this->image;
}
/**
* @return string|null
*/
public function getVariant() {
return $this->variant;
}
/**
* @return string|null
*/
public function getFormat() {
return $this->format;
}
/**
* If this is a request for an image, get the ResourceLoaderImage object.
*
* @since 1.25
* @return ResourceLoaderImage|bool false if a valid object cannot be created
*/
public function getImageObj() {
if ( $this->imageObj === null ) {
$this->imageObj = false;
if ( !$this->image ) {
return $this->imageObj;
}
$modules = $this->getModules();
if ( count( $modules ) !== 1 ) {
return $this->imageObj;
}
$module = $this->getResourceLoader()->getModule( $modules[0] );
if ( !$module || !$module instanceof ResourceLoaderImageModule ) {
return $this->imageObj;
}
$image = $module->getImage( $this->image, $this );
if ( !$image ) {
return $this->imageObj;
}
$this->imageObj = $image;
}
return $this->imageObj;
}
/**
* @return bool
*/
public function shouldIncludeScripts() {
return $this->getOnly() === null || $this->getOnly() === 'scripts';
}
/**
* @return bool
*/
public function shouldIncludeStyles() {
return $this->getOnly() === null || $this->getOnly() === 'styles';
}
/**
* @return bool
*/
public function shouldIncludeMessages() {
return $this->getOnly() === null;
}
/**
* All factors that uniquely identify this request, except 'modules'.
*
* The list of modules is excluded here for legacy reasons as most callers already
* split up handling of individual modules. Including it here would massively fragment
* the cache and decrease its usefulness.
*
* E.g. Used by RequestFileCache to form a cache key for storing the reponse output.
*
* @return string
*/
public function getHash() {
if ( !isset( $this->hash ) ) {
$this->hash = implode( '|', [
// Module content vary
$this->getLanguage(),
$this->getSkin(),
$this->getDebug(),
$this->getUser(),
// Request vary
$this->getOnly(),
$this->getVersion(),
$this->getRaw(),
$this->getImage(),
$this->getVariant(),
$this->getFormat(),
] );
}
return $this->hash;
}
}