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<?php |
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namespace SIL; |
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use Title; |
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use ParserOutput; |
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/** |
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* @license GNU GPL v2+ |
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* @since 1.0 |
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* |
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* @author mwjames |
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*/ |
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class SiteLanguageLinksParserOutputAppender { |
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/** |
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* @var ParserOutput |
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*/ |
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private $parserOutput; |
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/** |
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* @var InterlanguageLinksLookup |
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*/ |
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private $interlanguageLinksLookup; |
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/** |
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* This is made static by choice to monitor multiple parser calls and filter |
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* out links with the same target. |
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* |
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* @var array |
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*/ |
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private static $languageTargetLinksMap = []; |
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/** |
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* @since 1.0 |
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* |
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* @param ParserOutput $parserOutput |
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* @param InterlanguageLinksLookup $interlanguageLinksLookup |
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*/ |
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public function __construct( ParserOutput $parserOutput, InterlanguageLinksLookup $interlanguageLinksLookup ) { |
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$this->parserOutput = $parserOutput; |
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$this->interlanguageLinksLookup = $interlanguageLinksLookup; |
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} |
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/** |
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* @since 1.0 |
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* |
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* @param Title $target |
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* |
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* @return Title |
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*/ |
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public function getRedirectTargetFor( Title $title ) { |
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return $this->interlanguageLinksLookup->getRedirectTargetFor( $title ); |
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} |
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/** |
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* @since 1.0 |
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* |
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* @param InterlanguageLink $interlanguageLink |
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* @param Title|null $target |
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* |
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* @return string |
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*/ |
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public function tryAddLanguageTargetLinksToOutput( InterlanguageLink $interlanguageLink, Title $target = null ) { |
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$knownTargetLink = ''; |
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$selectedTargetLinkForCurrentLanguage = false; |
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$languageTargetLinks = $this->interlanguageLinksLookup->queryLanguageTargetLinks( |
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$interlanguageLink, |
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$target |
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); |
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// Always update the cache entry with an annotation directly made to avoid |
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// extra lookup during the view action |
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$this->interlanguageLinksLookup->pushPageLanguageToLookupCache( |
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$target, |
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$interlanguageLink->getLanguageCode() |
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); |
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if ( isset( $languageTargetLinks[ $interlanguageLink->getLanguageCode() ] ) ) { |
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$selectedTargetLinkForCurrentLanguage = $languageTargetLinks[ $interlanguageLink->getLanguageCode() ]; |
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} |
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$knownTargetLink = $this->compareTargetToCurrentLanguage( |
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$target, |
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$selectedTargetLinkForCurrentLanguage |
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); |
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if ( !$knownTargetLink ) { |
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$this->addLanguageLinksToOutput( |
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$interlanguageLink, |
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$languageTargetLinks |
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); |
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} |
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$this->doPurgeParserCache( $languageTargetLinks ); |
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return $knownTargetLink; |
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} |
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/** |
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* Identify whether a double assignment did occur by comparing the target |
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* for the requested language and the current article as target that invoked |
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* INTERLANGUAGELINK parser. |
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* |
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* @return boolean|string |
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*/ |
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private function compareTargetToCurrentLanguage( Title $target = null, $selectedTargetLinkForCurrentLanguage ) { |
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if ( $selectedTargetLinkForCurrentLanguage instanceof Title ) { |
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$selectedTargetLinkForCurrentLanguage = $selectedTargetLinkForCurrentLanguage->getPrefixedText(); |
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} |
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if ( $target !== null && $selectedTargetLinkForCurrentLanguage !== $target->getPrefixedText() ) { |
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$title = Title::newFromText( $selectedTargetLinkForCurrentLanguage ); |
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if ( $title->isRedirect() ) { |
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// $this->interlanguageLinksLookup->resetLookupCacheBy( $target ); |
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return false; |
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} |
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return $selectedTargetLinkForCurrentLanguage; |
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} |
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return false; |
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} |
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/** |
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* `sil:` is used as internal code to distinguish any language link that |
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* was not added by SIL |
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*/ |
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private function addLanguageLinksToOutput( InterlanguageLink $interlanguageLink, array $languageTargetLinks ) { |
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$languageTargetLinks = $this->sanitizeLanguageTargetLinks( |
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$interlanguageLink, |
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$languageTargetLinks |
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); |
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foreach ( $languageTargetLinks as $languageCode => $target ) { |
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if ( $target instanceof Title ) { |
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$target = $target->getPrefixedText(); |
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} |
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// Multiple parser calls can create maps that contain the same targets, |
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// safeguard against mutliple entries with the same target |
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if ( isset( self::$languageTargetLinksMap[$languageCode] ) && self::$languageTargetLinksMap[$languageCode] === $target ) { |
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continue; |
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} |
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self::$languageTargetLinksMap[$languageCode] = $target; |
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$this->parserOutput->addLanguageLink( 'sil:' . $languageCode . ':' . $target ); |
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} |
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} |
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private function sanitizeLanguageTargetLinks( InterlanguageLink $interlanguageLink, array $languageTargetLinks ) { |
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unset( $languageTargetLinks[ $interlanguageLink->getLanguageCode() ] ); |
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ksort( $languageTargetLinks ); |
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return $languageTargetLinks; |
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} |
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private function doPurgeParserCache( $languageTargetLinks ) { |
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foreach ( $languageTargetLinks as $languageTargetLink ) { |
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if ( !$languageTargetLink instanceof Title ) { |
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continue; |
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} |
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$languageTargetLink->invalidateCache(); |
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} |
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} |
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} |
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SemanticMediaWiki /
SemanticInterlanguageLinks
