ReadOnlyConstraint.php

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<?php
namespace MediaWiki\EditPage\Constraint;
 
use StatusValue;
use Wikimedia\Rdbms\ReadOnlyMode;
 
class ReadOnlyConstraint implements IEditConstraint {
 
    private $readOnlyMode;
 
    private $result;
 
    public function __construct( ReadOnlyMode $readOnlyMode ) {
        $this->readOnlyMode = $readOnlyMode;
    }
 
    public function checkConstraint(): string {
        $this->result = $this->readOnlyMode->isReadOnly() ?
            self::CONSTRAINT_FAILED :
            self::CONSTRAINT_PASSED;
        return $this->result;
    }
 
    public function getLegacyStatus(): StatusValue {
        $statusValue = StatusValue::newGood();
 
        if ( $this->result === self::CONSTRAINT_FAILED ) {
            // Saved that this is read only in case getLegacyStatus is called
            // after the read only ends, because it still caused the failure
            $statusValue->fatal( 'readonlytext' );
            $statusValue->value = self::AS_READ_ONLY_PAGE;
        }
 
        return $statusValue;
    }
 
}