ApiImageRotate.php

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<?php
class ApiImageRotate extends ApiBase {
    private $mPageSet = null;

    private static function addValues( array &$result, $values, $flag = null, $name = null ) {
        foreach ( $values as $val ) {
            if ( $val instanceof Title ) {
                $v = [];
                ApiQueryBase::addTitleInfo( $v, $val );
            } elseif ( $name !== null ) {
                $v = [ $name => $val ];
            } else {
                $v = $val;
            }
            if ( $flag !== null ) {
                $v[$flag] = true;
            }
            $result[] = $v;
        }
    }

    public function execute() {
        $this->useTransactionalTimeLimit();

        $params = $this->extractRequestParams();
        $rotation = $params['rotation'];

        $continuationManager = new ApiContinuationManager( $this, [], [] );
        $this->setContinuationManager( $continuationManager );

        $pageSet = $this->getPageSet();
        $pageSet->execute();

        $result = [];

        self::addValues( $result, $pageSet->getInvalidTitlesAndReasons(), 'invalid' );
        self::addValues( $result, $pageSet->getSpecialTitles(), 'special', 'title' );
        self::addValues( $result, $pageSet->getMissingPageIDs(), 'missing', 'pageid' );
        self::addValues( $result, $pageSet->getMissingRevisionIDs(), 'missing', 'revid' );
        self::addValues( $result, $pageSet->getInterwikiTitlesAsResult() );

        foreach ( $pageSet->getTitles() as $title ) {
            $r = [];
            $r['id'] = $title->getArticleID();
            ApiQueryBase::addTitleInfo( $r, $title );
            if ( !$title->exists() ) {
                $r['missing'] = true;
            }

            $file = wfFindFile( $title, [ 'latest' => true ] );
            if ( !$file ) {
                $r['result'] = 'Failure';
                $r['errormessage'] = 'File does not exist';
                $result[] = $r;
                continue;
            }
            $handler = $file->getHandler();
            if ( !$handler || !$handler->canRotate() ) {
                $r['result'] = 'Failure';
                $r['errormessage'] = 'File type cannot be rotated';
                $result[] = $r;
                continue;
            }

            // Check whether we're allowed to rotate this file
            $permError = $this->checkPermissions( $this->getUser(), $file->getTitle() );
            if ( $permError !== null ) {
                $r['result'] = 'Failure';
                $r['errormessage'] = $permError;
                $result[] = $r;
                continue;
            }

            $srcPath = $file->getLocalRefPath();
            if ( $srcPath === false ) {
                $r['result'] = 'Failure';
                $r['errormessage'] = 'Cannot get local file path';
                $result[] = $r;
                continue;
            }
            $ext = strtolower( pathinfo( "$srcPath", PATHINFO_EXTENSION ) );
            $tmpFile = TempFSFile::factory( 'rotate_', $ext );
            $dstPath = $tmpFile->getPath();
            $err = $handler->rotate( $file, [
                'srcPath' => $srcPath,
                'dstPath' => $dstPath,
                'rotation' => $rotation
            ] );
            if ( !$err ) {
                $comment = wfMessage(
                    'rotate-comment'
                )->numParams( $rotation )->inContentLanguage()->text();
                $status = $file->upload( $dstPath,
                    $comment, $comment, 0, false, false, $this->getUser() );
                if ( $status->isGood() ) {
                    $r['result'] = 'Success';
                } else {
                    $r['result'] = 'Failure';
                    $r['errormessage'] = $this->getErrorFormatter()->arrayFromStatus( $status );
                }
            } else {
                $r['result'] = 'Failure';
                $r['errormessage'] = $err->toText();
            }
            $result[] = $r;
        }
        $apiResult = $this->getResult();
        ApiResult::setIndexedTagName( $result, 'page' );
        $apiResult->addValue( null, $this->getModuleName(), $result );

        $this->setContinuationManager( null );
        $continuationManager->setContinuationIntoResult( $apiResult );
    }

    private function getPageSet() {
        if ( $this->mPageSet === null ) {
            $this->mPageSet = new ApiPageSet( $this, 0, NS_FILE );
        }

        return $this->mPageSet;
    }

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

        if ( $permissionErrors ) {
            // Just return the first error
            $msg = $this->parseMsg( $permissionErrors[0] );

            return $msg['info'];
        }

        return null;
    }

    public function mustBePosted() {
        return true;
    }

    public function isWriteMode() {
        return true;
    }

    public function getAllowedParams( $flags = 0 ) {
        $result = [
            'rotation' => [
                ApiBase::PARAM_TYPE => [ '90', '180', '270' ],
                ApiBase::PARAM_REQUIRED => true
            ],
            'continue' => [
                ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
            ],
        ];
        if ( $flags ) {
            $result += $this->getPageSet()->getFinalParams( $flags );
        }

        return $result;
    }

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

    protected function getExamplesMessages() {
        return [
            'action=imagerotate&titles=File:Example.jpg&rotation=90&token=123ABC'
                => 'apihelp-imagerotate-example-simple',
            'action=imagerotate&generator=categorymembers&gcmtitle=Category:Flip&gcmtype=file&' .
                'rotation=180&token=123ABC'
                => 'apihelp-imagerotate-example-generator',
        ];
    }
}