1 files changed, 117 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/SQLStore/QueryDependency/QueryReferenceBacklinks.php b/www/wiki/extensions/SemanticMediaWiki/src/SQLStore/QueryDependency/QueryReferenceBacklinks.php
new file mode 100644
index 00000000..b683627c
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/SQLStore/QueryDependency/QueryReferenceBacklinks.php
@@ -0,0 +1,117 @@
+<?php
+
+namespace SMW\SQLStore\QueryDependency;
+
+use SMW\DIProperty;
+use SMW\DIWikiPage;
+use SMW\Message;
+use SMW\RequestOptions;
+use SMW\SemanticData;
+
+/**
+ * @license GNU GPL v2+
+ * @since 2.5
+ *
+ * @author mwjames
+ */
+class QueryReferenceBacklinks {
+
+	/**
+	 * @var QueryDependencyLinksStore
+	 */
+	private $queryDependencyLinksStore = null;
+
+	/**
+	 * @since 2.5
+	 *
+	 * @param QueryDependencyLinksStore $queryDependencyLinksStore
+	 */
+	public function __construct( QueryDependencyLinksStore $queryDependencyLinksStore ) {
+		$this->queryDependencyLinksStore = $queryDependencyLinksStore;
+	}
+
+	/**
+	 * @since 2.5
+	 *
+	 * @param SemanticData $semanticData
+	 * @param RequestOptions|null $requestOptions
+	 *
+	 * @return boolean
+	 */
+	public function addReferenceLinksTo( SemanticData $semanticData, RequestOptions $requestOptions = null ) {
+
+		if ( !$this->queryDependencyLinksStore->isEnabled() ) {
+			return false;
+		}
+
+		// Don't display a reference where the requesting page is
+		// part of the list that contains queries (suppress self-embedded queries)
+		foreach ( $this->queryDependencyLinksStore->findEmbeddedQueryIdListBySubject( $semanticData->getSubject() ) as $key => $qid ) {
+			$requestOptions->addExtraCondition( 's_id!=' . $qid );
+		}
+
+		$referenceLinks = $this->findReferenceLinks( $semanticData->getSubject(), $requestOptions );
+
+		$property = new DIProperty(
+			'_ASK'
+		);
+
+		foreach ( $referenceLinks as $subject ) {
+			$semanticData->addPropertyObjectValue( $property, DIWikiPage::doUnserialize( $subject ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * @since 2.5
+	 *
+	 * @param DIWikiPage $subject
+	 * @param integer $limit
+	 * @param integer $offset
+	 *
+	 * @return array
+	 */
+	public function findReferenceLinks( DIWikiPage $subject, RequestOptions $requestOptions = null ) {
+
+		$queryTargetLinksHashList = $this->queryDependencyLinksStore->findDependencyTargetLinksForSubject(
+			$subject,
+			$requestOptions
+		);
+
+		return $queryTargetLinksHashList;
+	}
+
+	/**
+	 * @since 2.5
+	 *
+	 * @param DIProperty $property
+	 * @param DIWikiPage $subject
+	 *
+	 * @return boolean
+	 */
+	public function doesRequireFurtherLink( DIProperty $property, DIWikiPage $subject, &$html ) {
+
+		if ( $property->getKey() !== '_ASK' ) {
+			return true;
+		}
+
+		$localURL = \SpecialPage::getSafeTitleFor( 'SearchByProperty' )->getLocalURL(
+			[
+				 'property' => $property->getLabel(),
+				 'value'    => $subject->getTitle()->getPrefixedText()
+			]
+		);
+
+		$html .= \Html::element(
+			'a',
+			[ 'href' => $localURL ],
+			Message::get( 'smw_browse_more' )
+		);
+
+		// Return false in order to stop the link creation process the replace the
+		// generate link
+		return false;
+	}
+
+}