ApiFileRevert.php

Go to the documentation of this file.

<?php
class ApiFileRevert extends ApiBase {
    protected $file;

    protected $archiveName;

    protected $params;

    public function execute() {
        $this->params = $this->extractRequestParams();
        // Extract the file and archiveName from the request parameters
        $this->validateParameters();

        // Check whether we're allowed to revert this file
        $this->checkPermissions( $this->getUser() );

        $sourceUrl = $this->file->getArchiveVirtualUrl( $this->archiveName );
        $status = $this->file->upload(
            $sourceUrl,
            $this->params['comment'],
            $this->params['comment'],
            0,
            false,
            false,
            $this->getUser()
        );

        if ( $status->isGood() ) {
            $result = array( 'result' => 'Success' );
        } else {
            $result = array(
                'result' => 'Failure',
                'errors' => $this->getResult()->convertStatusToArray( $status ),
            );
        }

        $this->getResult()->addValue( null, $this->getModuleName(), $result );
    }

    protected function checkPermissions( $user ) {
        $title = $this->file->getTitle();
        $permissionErrors = array_merge(
            $title->getUserPermissionsErrors( 'edit', $user ),
            $title->getUserPermissionsErrors( 'upload', $user )
        );

        if ( $permissionErrors ) {
            $this->dieUsageMsg( $permissionErrors[0] );
        }
    }

    protected function validateParameters() {
        // Validate the input title
        $title = Title::makeTitleSafe( NS_FILE, $this->params['filename'] );
        if ( is_null( $title ) ) {
            $this->dieUsageMsg( array( 'invalidtitle', $this->params['filename'] ) );
        }
        $localRepo = RepoGroup::singleton()->getLocalRepo();

        // Check if the file really exists
        $this->file = $localRepo->newFile( $title );
        if ( !$this->file->exists() ) {
            $this->dieUsageMsg( 'notanarticle' );
        }

        // Check if the archivename is valid for this file
        $this->archiveName = $this->params['archivename'];
        $oldFile = $localRepo->newFromArchiveName( $title, $this->archiveName );
        if ( !$oldFile->exists() ) {
            $this->dieUsageMsg( 'filerevert-badversion' );
        }
    }

    public function mustBePosted() {
        return true;
    }

    public function isWriteMode() {
        return true;
    }

    public function getAllowedParams() {
        return array(
            'filename' => array(
                ApiBase::PARAM_TYPE => 'string',
                ApiBase::PARAM_REQUIRED => true,
            ),
            'comment' => array(
                ApiBase::PARAM_DFLT => '',
            ),
            'archivename' => array(
                ApiBase::PARAM_TYPE => 'string',
                ApiBase::PARAM_REQUIRED => true,
            ),
        );
    }

    public function getParamDescription() {
        return array(
            'filename' => 'Target filename without the File: prefix',
            'comment' => 'Upload comment',
            'archivename' => 'Archive name of the revision to revert to',
        );
    }

    public function getDescription() {
        return array(
            'Revert a file to an old version.'
        );
    }

    public function needsToken() {
        return 'csrf';
    }

    public function getExamples() {
        return array(
            'api.php?action=filerevert&filename=Wiki.png&comment=Revert&' .
                'archivename=20110305152740!Wiki.png&token=123ABC'
                => 'Revert Wiki.png to the version of 20110305152740',
        );
    }
}