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<?php
namespace SMW\SQLStore\Lookup;
use RuntimeException;
use SMW\DIProperty;
use SMW\Exception\PropertyLabelNotResolvedException;
use SMW\SQLStore\PropertyStatisticsStore;
use SMW\SQLStore\SQLStore;
use SMW\Store;
use SMWDIError as DIError;
use SMWRequestOptions as RequestOptions;
/**
* @license GNU GPL v2+
* @since 2.2
*
* @author mwjames
* @author Nischay Nahata
*/
class UnusedPropertyListLookup implements ListLookup {
/**
* @var Store
*/
private $store;
/**
* @var PropertyStatisticsStore
*/
private $propertyStatisticsStore;
/**
* @var RequestOptions
*/
private $requestOptions;
/**
* @since 2.2
*
* @param Store $store
* @param PropertyStatisticsStore $propertyStatisticsStore
* @param RequestOptions $requestOptions|null
*/
public function __construct( Store $store, PropertyStatisticsStore $propertyStatisticsStore, RequestOptions $requestOptions = null ) {
$this->store = $store;
$this->propertyStatisticsStore = $propertyStatisticsStore;
$this->requestOptions = $requestOptions;
}
/**
* @since 2.2
*
* @return DIProperty[]
* @throws RuntimeException
*/
public function fetchList() {
if ( $this->requestOptions === null ) {
throw new RuntimeException( "Missing requestOptions" );
}
return $this->buildPropertyList( $this->selectPropertiesFromTable() );
}
/**
* @since 2.2
*
* @return boolean
*/
public function isFromCache() {
return false;
}
/**
* @since 2.2
*
* @return integer
*/
public function getTimestamp() {
return wfTimestamp( TS_UNIX );
}
/**
* @since 2.2
*
* @return string
*/
public function getHash() {
return __METHOD__ . '#' . ( $this->requestOptions !== null ? $this->requestOptions->getHash() : '' );
}
private function selectPropertiesFromTable() {
// the query needs to do the filtering of internal properties, else LIMIT is wrong
$options = [ 'ORDER BY' => 'smw_sort' ];
if ( $this->requestOptions->limit > 0 ) {
$options['LIMIT'] = $this->requestOptions->limit;
$options['OFFSET'] = max( $this->requestOptions->offset, 0 );
}
$conditions = [
"smw_title NOT LIKE '\_%'", // #2182, exclude predefined properties
'smw_id > ' . SQLStore::FIXED_PROPERTY_ID_UPPERBOUND,
'smw_namespace' => SMW_NS_PROPERTY,
'smw_iw' => '',
'smw_subobject' => '',
'smw_proptable_hash IS NOT NULL'
];
$conditions['usage_count'] = 0;
if ( $this->requestOptions->getStringConditions() ) {
$conditions[] = $this->store->getSQLConditions( $this->requestOptions, '', 'smw_sortkey', false );
}
$idTable = $this->store->getObjectIds()->getIdTable();
$res = $this->store->getConnection( 'mw.db' )->select(
[ $idTable ,$this->propertyStatisticsStore->getStatisticsTable() ],
[ 'smw_title', 'usage_count' ],
$conditions,
__METHOD__,
$options,
[ $idTable => [ 'INNER JOIN', [ 'smw_id=p_id' ] ] ]
);
return $res;
}
private function buildPropertyList( $res ) {
$result = [];
foreach ( $res as $row ) {
$result[] = $this->addPropertyFor( $row->smw_title );
}
return $result;
}
private function addPropertyFor( $title ) {
try {
$property = new DIProperty( $title );
} catch ( PropertyLabelNotResolvedException $e ) {
$property = new DIError( new \Message( 'smw_noproperty', [ $title ] ) );
}
return $property;
}
}
|
