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SubpageOfCondition.php
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SubpageOfCondition.php
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<?php
namespace MediaWiki\RecentChanges\ChangesListQuery;
use MediaWiki\Linker\LinkTarget;
use MediaWiki\Page\PageReference;
use Wikimedia\Rdbms\IExpression;
use Wikimedia\Rdbms\IReadableDatabase;
use Wikimedia\Rdbms\LikeValue;
use Wikimedia\Rdbms\RawSQLExpression;
/**
* Check if the changed title is a subpage of some specified title.
*
* @since 1.45
*/
class SubpageOfCondition extends ChangesListConditionBase {
/**
* @param \stdClass $row
* @param TitleConditionValue $value
* @return bool
*/
public function evaluate( \stdClass $row, $value ): bool {
return (int)$row->rc_namespace === $value->namespace
&& str_starts_with( $row->rc_title, $value->dbKey );
}
/** @inheritDoc */
protected function prepareCapture( IReadableDatabase $dbr, QueryBackend $query ) {
$query->fields( [ 'rc_namespace', 'rc_title' ] );
}
/** @inheritDoc */
public function prepareConds( IReadableDatabase $dbr, QueryBackend $query ) {
[ $required, $excluded ] = $this->getUniqueValues();
if ( $required === [] ) {
$query->forceEmptySet();
} elseif ( $required ) {
$query->where( $this->makeExpression( $dbr, $required ) );
} elseif ( $excluded ) {
$expr = $this->makeExpression( $dbr, $excluded );
$query->where(
new RawSQLExpression( 'NOT (' . $expr->toSql( $dbr ) . ')' )
);
}
}
/**
* @param IReadableDatabase $dbr
* @param TitleConditionValue[] $values
* @return \Wikimedia\Rdbms\OrExpressionGroup
*/
private function makeExpression( IReadableDatabase $dbr, $values ) {
$prefixesByNs = TitleConditionValue::makeSet( $values );
$orConds = [];
foreach ( $prefixesByNs as $ns => $prefixes ) {
$titleExpr = null;
foreach ( $prefixes as $prefix => $unused ) {
$prefixExpr = $dbr->expr(
'rc_title',
IExpression::LIKE,
new LikeValue(
$prefix,
$dbr->anyString()
)
);
$titleExpr = $titleExpr ? $titleExpr->orExpr( $prefixExpr ) : $prefixExpr;
}
if ( $titleExpr ) {
$orConds[] = $dbr->expr( 'rc_namespace', '=', $ns )
->andExpr( $titleExpr );
}
}
if ( $orConds ) {
return $dbr->orExpr( $orConds );
} else {
throw new \RuntimeException( 'Need at least one title' );
}
}
/** @inheritDoc */
public function validateValue( $value ) {
if ( $value instanceof LinkTarget ) {
$ns = $value->getNamespace();
$dbk = $value->getDBkey();
} elseif ( $value instanceof PageReference ) {
$ns = $value->getNamespace();
$dbk = $value->getDBkey();
} else {
throw new \InvalidArgumentException(
"Unknown value type for subpageof"
);
}
// Need a single trailing slash
$dbk = rtrim( $dbk, '/' );
return new TitleConditionValue( $ns, "$dbk/" );
}
}

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Sat, Oct 3, 05:31 (2 w, 5 d ago)
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Default Alt Text
SubpageOfCondition.php (2 KB)

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