ImageRedirectConstraint.php

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<?php
namespace MediaWiki\EditPage\Constraint;
 
use MediaWiki\Content\Content;
use MediaWiki\EditPage\EditPageStatus;
use MediaWiki\Exception\PermissionsError;
use MediaWiki\Linker\LinkTarget;
use MediaWiki\Permissions\Authority;
 
class ImageRedirectConstraint extends EditConstraint {
 
    public function __construct(
        private readonly Content $newContent,
        private readonly LinkTarget $title,
        private readonly Authority $performer,
    ) {
    }
 
    public function checkConstraint(): EditPageStatus {
        // Check isn't simple enough to just repeat when getting the status
        if ( $this->title->getNamespace() === NS_FILE &&
            $this->newContent->isRedirect() &&
            !$this->performer->isAllowed( 'upload' )
        ) {
            $errorCode = $this->performer->getUser()->isRegistered() ?
                self::AS_IMAGE_REDIRECT_LOGGED :
                self::AS_IMAGE_REDIRECT_ANON;
            return EditPageStatus::newGood( $errorCode )
                ->setOK( false )
                ->setErrorFunction( static fn () => throw new PermissionsError( 'upload' ) );
        }
 
        return EditPageStatus::newGood();
    }
 
}