CreationPermissionConstraint.php

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<?php
namespace MediaWiki\EditPage\Constraint;
 
use MediaWiki\Permissions\Authority;
use StatusValue;
use Title;
 
class CreationPermissionConstraint implements IEditConstraint {
 
    private $performer;
 
    private $title;
 
    private $result;
 
    public function __construct(
        Authority $performer,
        Title $title
    ) {
        $this->performer = $performer;
        $this->title = $title;
    }
 
    public function checkConstraint(): string {
        // Check isn't simple enough to just repeat when getting the status
        if ( !$this->performer->authorizeWrite( 'create', $this->title ) ) {
            $this->result = self::CONSTRAINT_FAILED;
            return self::CONSTRAINT_FAILED;
        }
 
        $this->result = self::CONSTRAINT_PASSED;
        return self::CONSTRAINT_PASSED;
    }
 
    public function getLegacyStatus(): StatusValue {
        $statusValue = StatusValue::newGood();
 
        if ( $this->result === self::CONSTRAINT_FAILED ) {
            $statusValue->fatal( 'nocreatetext' );
            $statusValue->value = self::AS_NO_CREATE_PERMISSION;
        }
 
        return $statusValue;
    }
 
}