CopyFileOp.php

Go to the documentation of this file.

<?php
namespace Wikimedia\FileBackend\FileOps;
 
use StatusValue;
use Wikimedia\FileBackend\FileBackend;
 
class CopyFileOp extends FileOp {
    protected function allowedParams() {
        return [
            [ 'src', 'dst' ],
            [ 'overwrite', 'overwriteSame', 'ignoreMissingSource', 'headers' ],
            [ 'src', 'dst' ]
        ];
    }
 
    protected function doPrecheck(
        FileStatePredicates $opPredicates,
        FileStatePredicates $batchPredicates
    ) {
        $status = StatusValue::newGood();
 
        if ( !$this->backend->isPathUsableInternal( $this->params['dst'] ) ) {
            $status->fatal( 'backend-fail-usable', $this->params['dst'] );
 
            return $status;
        }
 
        if (
            !$this->getParam( 'ignoreMissingSource' ) &&
            !$this->backend->isPathUsableInternal( $this->params['src'] )
        ) {
            $status->fatal( 'backend-fail-usable', $this->params['src'] );
 
            return $status;
        }
 
        // Check source file existence
        $srcExists = $this->resolveFileExistence( $this->params['src'], $opPredicates );
        if ( $srcExists === false ) {
            if ( $this->getParam( 'ignoreMissingSource' ) ) {
                $this->noOp = true; // no-op
                // Update file existence predicates (cache 404s)
                $batchPredicates->assumeFileDoesNotExist( $this->params['src'] );
 
                return $status; // nothing to do
            } else {
                $status->fatal( 'backend-fail-notexists', $this->params['src'] );
 
                return $status;
            }
        } elseif ( $srcExists === FileBackend::EXISTENCE_ERROR ) {
            $status->fatal( 'backend-fail-stat', $this->params['src'] );
 
            return $status;
        }
        // Check if an incompatible destination file exists
        $srcSize = function () use ( $opPredicates ) {
            static $size = null;
            $size ??= $this->resolveFileSize( $this->params['src'], $opPredicates );
            return $size;
        };
        $srcSha1 = function () use ( $opPredicates ) {
            static $sha1 = null;
            $sha1 ??= $this->resolveFileSha1Base36( $this->params['src'], $opPredicates );
            return $sha1;
        };
        $status->merge( $this->precheckDestExistence( $opPredicates, $srcSize, $srcSha1 ) );
        $this->params['dstExists'] = $this->destExists; // see FileBackendStore::setFileCache()
 
        // Update file existence predicates if the operation is expected to be allowed to run
        if ( $status->isOK() ) {
            $batchPredicates->assumeFileExists( $this->params['dst'], $srcSize, $srcSha1 );
        }
 
        return $status; // safe to call attempt()
    }
 
    protected function doAttempt() {
        if ( $this->overwriteSameCase ) {
            $status = StatusValue::newGood(); // nothing to do
        } elseif ( $this->params['src'] === $this->params['dst'] ) {
            // Just update the destination file headers
            $headers = $this->getParam( 'headers' ) ?: [];
            $status = $this->backend->describeInternal( $this->setFlags( [
                'src' => $this->params['dst'], 'headers' => $headers
            ] ) );
        } else {
            // Copy the file to the destination
            $status = $this->backend->copyInternal( $this->setFlags( $this->params ) );
        }
 
        return $status;
    }
 
    public function storagePathsRead() {
        return [ $this->params['src'] ];
    }
 
    public function storagePathsChanged() {
        return [ $this->params['dst'] ];
    }
}
 
class_alias( CopyFileOp::class, 'CopyFileOp' );