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<?php |
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namespace Wikibase\Client\Hooks; |
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use ExtensionRegistry; |
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use File; |
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use Html; |
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use PageImages\PageImages; |
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use Title; |
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use Wikibase\Client\RepoLinker; |
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use Wikibase\Client\WikibaseClient; |
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use Wikibase\DataModel\Entity\EntityDocument; |
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use Wikibase\DataModel\Entity\EntityId; |
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use Wikibase\DataModel\Services\Lookup\EntityLookupException; |
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use Wikibase\DataModel\Term\FingerprintProvider; |
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/** |
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* @license GPL-2.0-or-later |
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*/ |
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class SkinAfterBottomScriptsHandler { |
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/** @var WikibaseClient */ |
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private $client; |
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/** @var RepoLinker */ |
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private $repoLinker; |
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/** |
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* @param WikibaseClient $client |
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*/ |
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public function __construct( WikibaseClient $client, RepoLinker $repoLinker ) { |
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$this->client = $client; |
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$this->repoLinker = $repoLinker; |
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} |
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/** |
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* @param Title $title |
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* @param string|null $revisionTimestamp |
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* @param EntityId $entityId |
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* |
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* @return string |
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*/ |
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public function createSchemaElement( |
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Title $title, |
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$revisionTimestamp, |
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EntityId $entityId |
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) { |
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$entityConceptUri = $this->repoLinker->getEntityConceptUri( $entityId ); |
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$imageFile = $this->queryPageImage( $title ); |
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$entityDocument = $this->lookupEntityDocument( $entityId ); |
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$description = $this->getDescription( $entityDocument ); |
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$schema = $this->createSchema( |
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$title, $revisionTimestamp, $entityConceptUri, $imageFile, $description |
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); |
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$html = Html::openElement( 'script', [ 'type' => 'application/ld+json' ] ); |
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$html .= json_encode( $schema ); |
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$html .= Html::closeElement( 'script' ); |
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return $html; |
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} |
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/** |
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* @param Title $title |
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* @param string|null $revisionTimestamp |
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* @param string $entityConceptUri |
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* @param File|null $imageFile |
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* @param string|null $description |
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* |
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* @return array |
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*/ |
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public function createSchema( |
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Title $title, |
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$revisionTimestamp, |
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$entityConceptUri, |
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File $imageFile = null, |
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$description = null |
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) { |
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$schema = [ |
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'@context' => 'https://schema.org', |
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'@type' => 'Article', |
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'name' => $title->getText(), |
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'url' => $title->getFullURL( '', false, PROTO_CANONICAL ), |
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'sameAs' => $entityConceptUri, |
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'mainEntity' => $entityConceptUri, |
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'author' => [ |
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'@type' => 'Organization', |
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'name' => wfMessage( 'wikibase-page-schema-author-name' )->text() |
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], |
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'publisher' => [ |
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'@type' => 'Organization', |
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'name' => wfMessage( 'wikibase-page-schema-publisher-name' )->text(), |
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'logo' => [ |
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'@type' => 'ImageObject', |
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'url' => wfMessage( 'wikibase-page-schema-publisher-logo-url' )->text() |
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] |
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], |
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'datePublished' => wfTimestamp( TS_ISO_8601, $title->getEarliestRevTime() ) |
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]; |
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if ( $revisionTimestamp ) { |
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$schema['dateModified'] = wfTimestamp( TS_ISO_8601, $revisionTimestamp ); |
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} |
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if ( $imageFile ) { |
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$schema['image'] = wfExpandUrl( $imageFile->getUrl(), PROTO_CANONICAL ); |
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} |
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if ( $description ) { |
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$schema['headline'] = $description; |
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} |
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return $schema; |
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} |
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/** |
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* @param EntityId $entityId |
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* |
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* @return EntityDocument|null |
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*/ |
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private function lookupEntityDocument( EntityId $entityId ) { |
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try { |
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$entityLookup = $this->client->getStore()->getEntityLookup(); |
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return $entityLookup->getEntity( $entityId ); |
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} catch ( EntityLookupException $ex ) { |
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return null; |
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} |
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} |
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/** |
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* If available, query the canonical page image injected into the og:image meta tag. It's |
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* important that the schema image match the page meta image since the schema describes the page. |
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* @param Title $title |
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* |
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* @return File|null |
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*/ |
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private function queryPageImage( Title $title ) { |
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if ( !ExtensionRegistry::getInstance()->isLoaded( 'PageImages' ) ) { |
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return null; |
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} |
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return PageImages::getPageImage( $title ) ?: null; |
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} |
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/** |
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* @param EntityDocument|null $entity |
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* |
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* @return string |
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*/ |
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private function getDescription( EntityDocument $entity = null ) { |
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if ( !$entity || !( $entity instanceof FingerprintProvider ) ) { |
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return ''; |
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} |
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$langCode = $this->client->getContentLanguage()->getCode(); |
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$fingerprint = $entity->getFingerprint(); |
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if ( !$fingerprint->hasDescription( $langCode ) ) { |
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return ''; |
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} |
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return $fingerprint->getDescription( $langCode )->getText(); |
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} |
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} |
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In PHP, under loose comparison (like
==, or!=, orswitchconditions), values of different types might be equal.For
stringvalues, the empty string''is a special case, in particular the following results might be unexpected: