relatedArticlesConfig = $configFactory->makeConfig( 'RelatedArticles' );
$this->disambiguatorLookup = $disambiguatorLookup;
}
/**
* Uses the Disambiguator extension to test whether the page is a disambiguation page.
*
* If the Disambiguator extension isn't installed, then the test always fails, i.e. the page is
* never a disambiguation page.
*
* @param Title $title
* @return bool
*/
private function isDisambiguationPage( Title $title ) {
return $this->disambiguatorLookup &&
$this->disambiguatorLookup->isDisambiguationPage( $title );
}
/**
* Check whether the output page is a diff page
*
* @param IContextSource $context
* @return bool
*/
private static function isDiffPage( IContextSource $context ) {
$request = $context->getRequest();
$type = $request->getRawVal( 'type' );
$diff = $request->getCheck( 'diff' );
$oldId = $request->getCheck( 'oldid' );
return $type === 'revision' || $diff || $oldId;
}
/**
* Is ReadMore allowed on skin?
*
* Some wikis may want to only enable the feature on some skins, so we'll only
* show it if the allow list (`RelatedArticlesFooterAllowedSkins`
* configuration variable) is empty or the skin is listed.
*
* @param Skin $skin
* @return bool
*/
private function isReadMoreAllowedOnSkin( Skin $skin ) {
$skins = $this->relatedArticlesConfig->get( 'RelatedArticlesFooterAllowedSkins' );
$skinName = $skin->getSkinName();
return !$skins || in_array( $skinName, $skins );
}
/**
* Can the page show related articles?
*
* @param Skin $skin
* @return bool
*/
private function hasRelatedArticles( Skin $skin ): bool {
$title = $skin->getTitle();
$action = $skin->getRequest()->getRawVal( 'action' ) ?? 'view';
return $title->inNamespace( NS_MAIN ) &&
// T120735
$action === 'view' &&
!$title->isMainPage() &&
$title->exists() &&
!self::isDiffPage( $skin ) &&
!$this->isDisambiguationPage( $title ) &&
$this->isReadMoreAllowedOnSkin( $skin );
}
/**
* Handler for the BeforePageDisplay hook.
*
* Adds the ext.relatedArticles.readMore.bootstrap module
* to the output when:
*
*
* - On mobile, the output is being rendered with
*
SkinMinervaBeta
* - The page is in mainspace
* - The action is 'view'
* - The page is not the Main Page
* - The page is not a disambiguation page
* - The page is not a diff page
* - The feature is allowed on the skin (see isReadMoreAllowedOnSkin() above)
*
*
* @param OutputPage $out The OutputPage object
* @param Skin $skin Skin object that will be used to generate the page
*/
public function onBeforePageDisplay( $out, $skin ): void {
if ( $this->hasRelatedArticles( $skin ) ) {
$out->addModules( [ 'ext.relatedArticles.readMore.bootstrap' ] );
$out->addModuleStyles( [ 'ext.relatedArticles.styles' ] );
}
}
/**
* ResourceLoaderGetConfigVars hook handler for setting a config variable
* @see https://www.mediawiki.org/wiki/Manual:Hooks/ResourceLoaderGetConfigVars
*
* @param array &$vars Array of variables to be added into the output of the startup module.
* @param string $skin
* @param Config $config
*/
public function onResourceLoaderGetConfigVars( array &$vars, $skin, Config $config ): void {
$limit = $this->relatedArticlesConfig->get( 'RelatedArticlesCardLimit' );
$vars['wgRelatedArticlesCardLimit'] = $limit;
if ( $limit < 1 || $limit > 20 ) {
throw new \RuntimeException(
'The value of wgRelatedArticlesCardLimit is not valid. It should be between 1 and 20.'
);
}
}
/**
* Handler for the ParserFirstCallInit hook.
*
* Registers the related parser function (see
* {@see Hooks::onFuncRelated}).
*
* @param Parser $parser Parser object
*/
public function onParserFirstCallInit( $parser ) {
$parser->setFunctionHook( 'related', [ self::class, 'onFuncRelated' ] );
}
/**
* The related parser function.
*
* Appends the arguments to the internal list so that it can be used
* more that once per page.
* We don't use setProperty here is there is no need
* to store it as a page prop in the database, only in the cache.
*
* @todo Test for uniqueness
* @param Parser $parser Parser object
* @param string ...$args
*
* @return string Always ''
*/
public static function onFuncRelated( Parser $parser, ...$args ) {
$parserOutput = $parser->getOutput();
// Add all the related pages passed by the parser function
// {{#related:Test with read more|Foo|Bar}}
foreach ( $args as $relatedPage ) {
$parserOutput->appendJsConfigVar( 'wgRelatedArticles', $relatedPage );
}
return '';
}
/**
* Passes the related pages list from the cached parser output
* object to the output page for rendering.
*
* The list of related pages will be retrieved using
* ParserOutput#getExtensionData.
*
* @param OutputPage $outputPage the OutputPage object
* @param ParserOutput $parserOutput ParserOutput object
*/
public function onOutputPageParserOutput( $outputPage, $parserOutput ): void {
// Backwards-compatibility with old cached content (T371421)
// This hook can be removed once this is no longer needed.
$related = $parserOutput->getExtensionData( 'RelatedArticles' ) ?? [];
$outputPage->addJsConfigVars( 'wgRelatedArticlesCompat', $related );
}
/**
* Create container for ReadMore cards so that they're correctly placed in all skins.
*
* @param string &$data
* @param Skin $skin
*/
public function onSkinAfterContent( &$data, $skin ) {
if ( $this->hasRelatedArticles( $skin ) ) {
$data .= Html::element( 'div', [ 'class' => 'read-more-container' ] );
}
}
}