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PageTitleRenamer.php
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PageTitleRenamer.php
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<?php
declare( strict_types = 1 );
namespace MediaWiki\Extension\Translate\PageTranslation;
use MediaWiki\Title\Title;
/**
* Contains logic to determine the new title of translatable pages and
* dependent pages being moved
* @author Niklas Laxström
* @author Abijeet Patro
* @license GPL-2.0-or-later
* @since 2021.09
*/
class PageTitleRenamer {
public const NO_ERROR = 0;
public const UNKNOWN_PAGE = 1;
public const NS_TALK_UNSUPPORTED = 2;
public const RENAME_FAILED = 3;
public const INVALID_TITLE = 4;
private const IMPOSSIBLE = null;
/** @var string[][] */
private $map = [];
public function __construct( Title $source, Title $target ) {
$this->map[$source->getNamespace()] = [
$target->getNamespace(),
$source->getText(),
$target->getText(),
];
$sourceTalkPage = $source->getTalkPageIfDefined();
$targetTalkPage = $target->getTalkPageIfDefined();
if ( $sourceTalkPage ) {
if ( !$targetTalkPage ) {
$this->map[$sourceTalkPage->getNamespace()] = [
self::IMPOSSIBLE,
null,
null,
];
} else {
$this->map[$sourceTalkPage->getNamespace()] = [
$targetTalkPage->getNamespace(),
$source->getText(),
$target->getText(),
];
}
}
$this->map[NS_TRANSLATIONS] = [
NS_TRANSLATIONS,
$source->getPrefixedText(),
$target->getPrefixedText(),
];
$this->map[NS_TRANSLATIONS_TALK] = [
NS_TRANSLATIONS_TALK,
$source->getPrefixedText(),
$target->getPrefixedText(),
];
}
public function getNewTitle( Title $title ): Title {
$instructions = $this->map[$title->getNamespace()] ?? null;
if ( $instructions === null ) {
throw new InvalidPageTitleRename(
'Trying to move a page which is not part of the translatable page', self::UNKNOWN_PAGE
);
}
[ $newNamespace, $search, $replace ] = $instructions;
if ( $newNamespace === self::IMPOSSIBLE ) {
throw new InvalidPageTitleRename(
'Trying to move a talk page to a namespace which does not have talk pages',
self::NS_TALK_UNSUPPORTED
);
}
$oldTitleText = $title->getText();
// Check if the old title matches the string being replaced, if so there is no
// need to run preg_replace. This will happen if the page is being moved from
// one namespace to another.
if ( $oldTitleText === $replace ) {
return Title::makeTitleSafe( $newNamespace, $replace );
}
$searchQuoted = preg_quote( $search, '~' );
$newText = preg_replace( "~^$searchQuoted~", $replace, $oldTitleText, 1 );
// If old and new title + namespace are same, the renaming failed.
if ( $oldTitleText === $newText && $newNamespace === $title->getNamespace() ) {
throw new InvalidPageTitleRename( 'Renaming failed', self::RENAME_FAILED );
}
$title = Title::makeTitleSafe( $newNamespace, $newText );
if ( $title === null ) {
throw new InvalidPageTitleRename( 'Invalid target title', self::INVALID_TITLE );
}
return $title;
}
}

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PageTitleRenamer.php (2 KB)

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