1 files changed, 120 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/Query/QueryLinker.php b/www/wiki/extensions/SemanticMediaWiki/src/Query/QueryLinker.php
new file mode 100644
index 00000000..e7bb42d5
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/Query/QueryLinker.php
@@ -0,0 +1,120 @@
+<?php
+
+namespace SMW\Query;
+
+use SMW\Message;
+use SMW\DIProperty;
+use SMWInfolink as Infolink;
+use SMWQuery as Query;
+
+/**
+ * Representing a Special:Ask query link to further query results
+ *
+ * @since 2.4
+ *
+ * @author mwjames
+ */
+class QueryLinker {
+
+	/**
+	 * @since 2.4
+	 *
+	 * @param Query $query
+	 * @param array $parameters
+	 *
+	 * @return Infolink
+	 */
+	public static function get( Query $query, array $parameters = [] ) {
+
+		$link = Infolink::newInternalLink( '', ':Special:Ask', false, [] );
+		$link->setCompactLink( $GLOBALS['smwgCompactLinkSupport'] );
+
+		foreach ( $parameters as $key => $value ) {
+
+			if ( !is_string( $key ) ) {
+				continue;
+			}
+
+			$link->setParameter( $value, $key );
+		}
+
+		$params = self::getParameters( $query );
+
+		foreach ( $params as $key => $param ) {
+			$link->setParameter( $param, is_string( $key ) ? $key : false );
+		}
+
+		$link->setCaption(
+			' ' . Message::get( 'smw_iq_moreresults', Message::TEXT, Message::USER_LANGUAGE )
+		);
+
+		return $link;
+	}
+
+	private static function getParameters( $query ) {
+
+		$params = [ trim( $query->getQueryString( true ) ) ];
+
+		foreach ( $query->getExtraPrintouts() as /* PrintRequest */ $printout ) {
+			if ( ( $serialisation = $printout->getSerialisation( true ) ) !== '' ) {
+				$params[] = $serialisation;
+			}
+		}
+
+		if ( $query->getMainLabel() !== false ) {
+			$params['mainlabel'] = $query->getMainLabel();
+		}
+
+		if ( $query->getQuerySource() !== '' ) {
+			$params['source'] = $query->getQuerySource();
+		}
+
+		$params['offset'] = $query->getOffset();
+
+		if ( $params['offset'] === 0 ) {
+			unset( $params['offset'] );
+		}
+
+		if ( $query->getLimit() > 0 ) {
+			$params['limit'] = $query->getLimit();
+		}
+
+		$sortKeys = $query->getSortKeys();
+		$count = count( $sortKeys );
+
+		if ( $count == 0 ) {
+			return $params;
+		}
+
+		$order = [];
+		$sort = [];
+
+		foreach ( $sortKeys as $key => $order_by ) {
+
+			$order_by = strtolower( $order_by );
+
+			// Default mode, skip
+			if ( $count == 1 && $key === '' && $order_by === 'asc' ) {
+				continue;
+			}
+
+			// Avoid predefined properties to appear as key as in _MDAT
+			if ( $key !== '' && $key{0} === '_' ) {
+				$key = DIProperty::newFromUserLabel( $key )->getLabel();
+			} else {
+				$key = str_replace( '_', ' ', $key );
+			}
+
+			$order[] = $order_by;
+			$sort[] = $key;
+		}
+
+		if ( $sort !== [] ) {
+			$params['order'] = implode( ',', $order );
+			$params['sort'] = implode( ',', $sort );
+		}
+
+		return $params;
+	}
+
+}