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<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* A parser that translates page titles on a foreign wiki into ForeignTitle
* objects, with no knowledge of the namespace setup on the foreign site.
*/
class NaiveForeignTitleFactory implements ForeignTitleFactory {
/** @var Language */
private $contentLanguage;
/**
* @param Language $contentLanguage
*/
public function __construct( Language $contentLanguage ) {
$this->contentLanguage = $contentLanguage;
}
/**
* Create a ForeignTitle object.
*
* Based on the page title and optionally the namespace ID, of a page on a foreign wiki.
* These values could be, for example, the `<title>` and `<ns>` attributes found in an
* XML dump.
*
* Although exported XML dumps have contained a map of namespace IDs to names
* since MW 1.5, the importer used to completely ignore the `<siteinfo>` tag
* before MW 1.25. It is therefore possible that custom XML dumps (i.e. not
* generated by Special:Export) have been created without this metadata.
* As a result, this code falls back to using namespace data for the local
* wiki (similar to buggy pre-1.25 behaviour) if $ns is not supplied.
*
* @param string $title The page title
* @param int|null $ns The namespace ID, or null if this data is not available
* @return ForeignTitle
*/
public function createForeignTitle( $title, $ns = null ) {
$pieces = explode( ':', $title, 2 );
/**
* Can we assume that the part of the page title before the colon is a
* namespace name?
*
* XML export schema version 0.5 and earlier (MW 1.18 and earlier) does not
* contain a <ns> tag, so we need to be able to handle that case.
*
* If we know the namespace ID, we assume a non-zero namespace ID means
* the ':' sets off a valid namespace name. If we don't know the namespace
* ID, we fall back to using the local wiki's namespace names to resolve
* this -- better than nothing, and mimics the old crappy behavior
*/
$isNamespacePartValid = $ns === null
? $this->contentLanguage->getNsIndex( $pieces[0] ) !== false
: $ns != 0;
if ( count( $pieces ) === 2 && $isNamespacePartValid ) {
list( $namespaceName, $pageName ) = $pieces;
} else {
$namespaceName = '';
$pageName = $title;
}
return new ForeignTitle( $ns, $namespaceName, $pageName );
}
}
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