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<?php |
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declare( strict_types = 1 ); |
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namespace ModernTimeline; |
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use ModernTimeline\ResultFacade\PropertyValueCollection; |
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use ModernTimeline\ResultFacade\Subject; |
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use ModernTimeline\ResultFacade\SubjectCollection; |
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use RepoGroup; |
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use SMW\DIWikiPage; |
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use SMWDITime; |
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class EventExtractor { |
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private $parameters; |
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public function __construct( array $parameters ) { |
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$this->parameters = $parameters; |
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} |
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/** |
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* @param SubjectCollection $pages |
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* @return Event[] |
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*/ |
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public function extractEvents( SubjectCollection $pages ): array { |
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$events = []; |
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foreach ( $pages->getSubjects() as $subject ) { |
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[ $startDate, $endDate ] = $this->getDates( $subject ); |
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if ( $startDate !== null ) { |
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$event = new Event( $subject, $startDate, $endDate ); |
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foreach ( $subject->getPropertyValueCollections() as $propertyValues ) { |
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if ( $propertyValues->getPrintRequest()->getText( null ) === $this->parameters['image property'] ) { |
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foreach ( $propertyValues->getDataItems() as $dataItem ) { |
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if ( $this->isImageValue( $dataItem ) ) { |
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$event->setImageUrl( $this->getUrlForFileTitle( $dataItem->getTitle() ) ); |
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} |
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} |
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} |
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} |
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$events[] = $event; |
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} |
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} |
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return $events; |
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} |
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private function isImageValue( \SMWDataItem $dataItem ) { |
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return $dataItem instanceof DIWikiPage |
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&& $dataItem->getTitle() instanceof \Title |
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&& $dataItem->getTitle()->getNamespace() === NS_FILE |
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&& $dataItem->getTitle()->exists(); |
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} |
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public function getUrlForFileTitle( \Title $existingTitle ): string { |
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return RepoGroup::singleton()->findFile( $existingTitle )->getURL(); |
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} |
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private function getDates( Subject $subject ): array { |
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$startDate = null; |
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$endDate = null; |
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foreach ( $this->getPropertyValueCollectionsWithDates( $subject ) as $propertyValues ) { |
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$dataItem = $propertyValues->getDataItems()[0]; |
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if ( $dataItem instanceof SMWDITime ) { |
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if ( $startDate === null ) { |
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$startDate = $dataItem; |
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} |
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else if ( $endDate === null ) { |
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$endDate = $dataItem; |
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break; |
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} |
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} |
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} |
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return [ $startDate, $endDate ]; |
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} |
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/** |
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* @return PropertyValueCollection[] |
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*/ |
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private function getPropertyValueCollectionsWithDates( Subject $subject ) { |
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return array_filter( |
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$subject->getPropertyValueCollections()->toArray(), |
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function( PropertyValueCollection $pvc ) { |
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return $pvc->getPrintRequest()->getTypeID() === '_dat' |
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&& $pvc->getDataItems() !== []; |
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} |
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); |
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} |
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} |
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ProfessionalWiki /
ModernTimeline
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This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.