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<?php
namespace SMW\MediaWiki\Specials\SearchByProperty;
use SMW\DataValueFactory;
use SMW\DIWikiPage;
use SMW\Query\DescriptionFactory;
use SMW\Query\PrintRequest as PrintRequest;
use SMW\SQLStore\QueryDependencyLinksStoreFactory;
use SMW\Store;
use SMWQuery as Query;
use SMWRequestOptions as RequestOptions;
/**
* @license GNU GPL v2+
* @since 2.1
*
* @author Denny Vrandecic
* @author Daniel Herzig
* @author Markus Kroetzsch
* @author mwjames
*/
class QueryResultLookup {
/**
* @var Store
*/
private $store;
/**
* @since 2.1
*/
public function __construct( Store $store ) {
$this->store = $store;
}
/**
* @since 2.5
*
* @param QueryOptions $pageRequestOptions
*
* @return array
*/
public function doQueryLinksReferences( PageRequestOptions $pageRequestOptions ) {
$requestOptions = new RequestOptions();
$requestOptions->setLimit( $pageRequestOptions->limit + 1 );
$requestOptions->setOffset( $pageRequestOptions->offset );
$requestOptions->sort = true;
$queryDependencyLinksStoreFactory = new QueryDependencyLinksStoreFactory();
$queryReferenceLinks = $queryDependencyLinksStoreFactory->newQueryReferenceBacklinks(
$this->store
);
$queryBacklinks = $queryReferenceLinks->findReferenceLinks(
$pageRequestOptions->value->getDataItem(),
$requestOptions
);
$results = [];
$dataValueFactory = DataValueFactory::getInstance();
foreach ( $queryBacklinks as $result ) {
$results[] = [
$dataValueFactory->newDataValueByItem( DIWikiPage::doUnserialize( $result ), null ),
$pageRequestOptions->value
];
}
return $results;
}
/**
* @since 2.1
*
* @param QueryOptions $pageRequestOptions
*
* @return array of array(SMWWikiPageValue, SMWDataValue) with the
* first being the entity, and the second the value
*/
public function doQuery( PageRequestOptions $pageRequestOptions ) {
$requestOptions = new RequestOptions();
$requestOptions->limit = $pageRequestOptions->limit + 1;
$requestOptions->offset = $pageRequestOptions->offset;
$requestOptions->sort = true;
if ( $pageRequestOptions->value === null || !$pageRequestOptions->value->isValid() ) {
$res = $this->doQueryForNonValue( $pageRequestOptions, $requestOptions );
} else {
$res = $this->doQueryForExactValue( $pageRequestOptions, $requestOptions );
}
$results = [];
$dataValueFactory = DataValueFactory::getInstance();
foreach ( $res as $result ) {
$results[] = [
$dataValueFactory->newDataValueByItem( $result, null ),
$pageRequestOptions->value
];
}
return $results;
}
/**
* Returns all results that have a value near to the searched for value
* on the property, ordered, and sorted by ending with the smallest
* one.
*
* @param QueryOptions $pageRequestOptions
* @param integer $count How many entities have the exact same value on the property?
* @param integer $greater Should the values be bigger? Set false for smaller values.
*
* @return array of array of SMWWikiPageValue, SMWDataValue with the
* first being the entity, and the second the value
*/
public function doQueryForNearbyResults( PageRequestOptions $pageRequestOptions, $count, $greater = true ) {
$comparator = $greater ? SMW_CMP_GRTR : SMW_CMP_LESS;
$sortOrder = $greater ? 'ASC' : 'DESC';
if ( $pageRequestOptions->value !== null && $pageRequestOptions->value->getTypeID() === '_txt' && strlen( $pageRequestOptions->valueString ) > 72 ) {
$comparator = SMW_CMP_LIKE;
}
$descriptionFactory = new DescriptionFactory();
if ( $pageRequestOptions->valueString === '' || $pageRequestOptions->valueString === null ) {
$description = $descriptionFactory->newThingDescription();
} else {
$description = $descriptionFactory->newValueDescription(
$pageRequestOptions->value->getDataItem(),
$pageRequestOptions->property->getDataItem(),
$comparator
);
$description = $descriptionFactory->newSomeProperty(
$pageRequestOptions->property->getDataItem(),
$description
);
}
$query = new Query( $description );
$query->setLimit( $pageRequestOptions->limit );
$query->setOffset( $pageRequestOptions->offset );
$query->sort = true;
$query->sortkeys = [
$pageRequestOptions->property->getDataItem()->getKey() => $sortOrder
];
// Note: printrequests change the caption of properties they
// get (they expect properties to be given to them).
// Since we want to continue using the property for our
// purposes, we give a clone to the print request.
$printouts = [
new PrintRequest( PrintRequest::PRINT_THIS, '' ),
new PrintRequest( PrintRequest::PRINT_PROP, '', clone $pageRequestOptions->property )
];
$query->setExtraPrintouts( $printouts );
$queryResults = $this->store->getQueryResult( $query );
$result = [];
while ( $resultArrays = $queryResults->getNext() ) {
$r = [];
foreach ( $resultArrays as $resultArray ) {
$r[] = $resultArray->getNextDataValue();
}
// Note: if results have multiple values for the property
// then this code just pick the first, which may not be
// the reason why the result is shown here, i.e., it could
// be out of order.
$result[] = $r;
}
if ( !$greater ) {
$result = array_reverse( $result );
}
return $result;
}
private function doQueryForNonValue( PageRequestOptions $pageRequestOptions, RequestOptions $requestOptions ) {
return $this->store->getPropertyValues(
null,
$pageRequestOptions->property->getDataItem(),
$requestOptions
);
}
private function doQueryForExactValue( PageRequestOptions $pageRequestOptions, RequestOptions $requestOptions ) {
$pageRequestOptions->value->setOption( 'is.search', true );
return $this->store->getPropertySubjects(
$pageRequestOptions->property->getDataItem(),
$pageRequestOptions->value->getDataItem(),
$requestOptions
);
}
}
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