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<?php
namespace SMW\Exporter;
use SMW\DIWikiPage;
use SMW\Exporter\Element\ExpElement;
use SMW\Exporter\Element\ExpResource;
use SMW\Localizer;
use SMW\Store;
use SMWDataItem as DataItem;
use Title;
/**
* @license GNU GPL v2+
* @since 2.4
*
* @author mwjames
*/
class DataItemMatchFinder {
/**
* @var Store
*/
private $store;
/**
* @var string
*/
private $wikiNamespace;
/**
* @since 2.4
*
* @param Store $store
* @param string $wikiNamespace
*/
public function __construct( Store $store, $wikiNamespace = '' ) {
$this->store = $store;
$this->wikiNamespace = $wikiNamespace;
}
/**
* Try to map an ExpElement to a representative DataItem which may return null
* if the attempt fails.
*
* @since 2.4
*
* @param ExpElement $expElement
*
* @return DataItem|null
*/
public function matchExpElement( ExpElement $expElement ) {
$dataItem = null;
if ( !$expElement instanceof ExpResource ) {
return $dataItem;
}
$uri = $expElement->getUri();
if ( strpos( $uri, $this->wikiNamespace ) !== false ) {
$dataItem = $this->matchToWikiNamespaceUri( $uri );
} else {
// Not in wikiNamespace therefore most likely an imported URI
$dataItem = $this->matchToUnknownWikiNamespaceUri( $uri );
}
return $dataItem;
}
private function matchToWikiNamespaceUri( $uri ) {
$dataItem = null;
$localName = substr( $uri, strlen( $this->wikiNamespace ) );
$dbKey = rawurldecode( Escaper::decodeUri( $localName ) );
$parts = explode( '#', $dbKey, 2 );
if ( count( $parts ) == 2 ) {
$dbKey = $parts[0];
$subobjectname = $parts[1];
} else {
$subobjectname = '';
}
$parts = explode( ':', $dbKey, 2 );
// No extra NS
if ( count( $parts ) == 1 ) {
return new DIWikiPage( $dbKey, NS_MAIN, '', $subobjectname );
}
$namespaceId = $this->matchToNamespaceName( $parts[0] );
if ( $namespaceId != -1 && $namespaceId !== false ) {
$dataItem = new DIWikiPage( $parts[1], $namespaceId, '', $subobjectname );
} else {
$title = Title::newFromDBkey( $dbKey );
if ( $title !== null ) {
$dataItem = new DIWikiPage( $title->getDBkey(), $title->getNamespace(), $title->getInterwiki(), $subobjectname );
}
}
return $dataItem;
}
private function matchToNamespaceName( $name ) {
// try the by far most common cases directly before using Title
$namespaceName = str_replace( '_', ' ', $name );
if ( ( $namespaceId = Localizer::getInstance()->getNamespaceIndexByName( $name ) ) !== false ) {
return $namespaceId;
}
foreach ( [ SMW_NS_PROPERTY, NS_CATEGORY, NS_USER, NS_HELP ] as $nsId ) {
if ( $namespaceName == Localizer::getInstance()->getNamespaceTextById( $nsId ) ) {
$namespaceId = $nsId;
break;
}
}
return $namespaceId;
}
private function matchToUnknownWikiNamespaceUri( $uri ) {
$dataItem = null;
// Sesame: Not a valid (absolute) URI: _node1abjt1k9bx17
if ( filter_var( $uri, FILTER_VALIDATE_URL ) === false ) {
return $dataItem;
}
$respositoryResult = $this->store->getConnection( 'sparql' )->select(
'?v1 ?v2',
"<$uri> rdfs:label ?v1 . <$uri> swivt:wikiNamespace ?v2",
[ 'LIMIT' => 1 ]
);
$expElements = $respositoryResult->current();
if ( $expElements !== false ) {
// ?v1
if ( isset( $expElements[0] ) ) {
$dbKey = $expElements[0]->getLexicalForm();
} else {
$dbKey = 'UNKNOWN';
}
// ?v2
if ( isset( $expElements[1] ) ) {
$namespace = strval( $expElements[1]->getLexicalForm() );
} else {
$namespace = NS_MAIN;
}
$dataItem = new DIWikiPage(
$this->getFittingDBKey( $dbKey, $namespace ),
$namespace
);
}
return $dataItem;
}
private function getFittingDBKey( $dbKey, $namespace ) {
// https://www.mediawiki.org/wiki/Manual:$wgCapitalLinks
// https://www.mediawiki.org/wiki/Manual:$wgCapitalLinkOverrides
if ( $GLOBALS['wgCapitalLinks'] || ( isset( $GLOBALS['wgCapitalLinkOverrides'][$namespace] ) && $GLOBALS['wgCapitalLinkOverrides'][$namespace] ) ) {
return mb_strtoupper( mb_substr( $dbKey, 0, 1 ) ) . mb_substr( $dbKey, 1 );
}
return $dbKey;
}
}
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