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|
<?php
namespace SMW\SQLStore\EntityStore;
use Onoi\Cache\Cache;
use SMW\DIWikiPage;
use SMW\IteratorFactory;
use SMW\RequestOptions;
use SMW\SQLStore\SQLStore;
use SMW\Store;
use InvalidArgumentException;
use SMWDataItem as DataItem;
/**
* @license GNU GPL v2+
* @since 3.0
*
* @author mwjames
*/
class UniquenessLookup {
/**
* @var Store
*/
private $store;
/**
* @var IteratorFactory
*/
private $iteratorFactory;
/**
* @since 3.0
*
* @param Store $store
* @param IteratorFactory $iteratorFactory
*/
public function __construct( Store $store, IteratorFactory $iteratorFactory ) {
$this->store = $store;
$this->iteratorFactory = $iteratorFactory;
}
/**
* @since 3.0
*
* @param DataItem $dataItem
*
* @return boolean
*/
public function isUnique( DataItem $dataItem ) {
$type = $dataItem->getDIType();
if ( $type !== DataItem::TYPE_WIKIPAGE && $type !== DataItem::TYPE_PROPERTY ) {
throw new InvalidArgumentException( 'Expects a DIProperty or DIWikiPage object.' );
}
$connection = $this->store->getConnection( 'mw.db' );
$query = $connection->newQuery();
$query->type( 'SELECT' );
$query->options( [ 'LIMIT' => 2 ] );
$query->table( SQLStore::ID_TABLE );
// Only find entities
$query->fields( [ 'smw_id', 'smw_sortkey' ] );
if ( $type === DataItem::TYPE_WIKIPAGE ) {
$query->condition( $query->eq( 'smw_title', $dataItem->getDBKey() ) );
$query->condition( $query->eq( 'smw_namespace', $dataItem->getNamespace() ) );
$query->condition( $query->eq( 'smw_subobject', $dataItem->getSubobjectName() ) );
} else {
$query->condition( $query->eq( 'smw_sortkey', $dataItem->getCanonicalLabel() ) );
$query->condition( $query->eq( 'smw_namespace', SMW_NS_PROPERTY ) );
$query->condition( $query->eq( 'smw_subobject', '' ) );
}
$query->condition( $query->neq( 'smw_iw', SMW_SQL3_SMWIW_OUTDATED ) );
$query->condition( $query->neq( 'smw_iw', SMW_SQL3_SMWDELETEIW ) );
$query->condition( $query->neq( 'smw_iw', SMW_SQL3_SMWREDIIW ) );
$res = $connection->query(
$query,
__METHOD__
);
return $res->numRows() < 2;
}
/**
* @since 3.0
*
* @return Iterator|[]
*/
public function findDuplicates() {
$connection = $this->store->getConnection( 'mw.db' );
$query = $connection->newQuery();
$query->type( 'SELECT' );
$query->table( SQLStore::ID_TABLE );
$query->fields(
[
'COUNT(*) as count',
'smw_title',
'smw_namespace',
'smw_iw',
'smw_subobject'
]
);
$query->condition( $query->neq( 'smw_iw', SMW_SQL3_SMWIW_OUTDATED ) );
$query->condition( $query->neq( 'smw_iw', SMW_SQL3_SMWDELETEIW ) );
$query->options(
[
'GROUP BY' => 'smw_title, smw_namespace, smw_iw, smw_subobject',
// @see https://stackoverflow.com/questions/8119489/postgresql-where-count-condition
// "HAVING count > 1"; doesn't work with postgres
'HAVING' => 'count(*) > 1'
]
);
$rows = $connection->query(
$query,
__METHOD__
);
if ( $rows === false ) {
return [];
}
$resultIterator = $this->iteratorFactory->newResultIterator(
$rows
);
$mappingIterator = $this->iteratorFactory->newMappingIterator( $resultIterator, function( $row ) {
return [
'count'=> $row->count,
'smw_title'=> $row->smw_title,
'smw_namespace'=> $row->smw_namespace,
'smw_iw'=> $row->smw_iw,
'smw_subobject'=> $row->smw_subobject
];
} );
return $mappingIterator;
}
}
|
