CreateFileOp.php

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<?php
namespace Wikimedia\FileBackend\FileOps;
 
use StatusValue;
 
class CreateFileOp extends FileOp {
    protected function allowedParams() {
        return [
            [ 'content', 'dst' ],
            [ 'overwrite', 'overwriteSame', 'headers' ],
            [ 'dst' ]
        ];
    }
 
    protected function doPrecheck(
        FileStatePredicates $opPredicates,
        FileStatePredicates $batchPredicates
    ) {
        $status = StatusValue::newGood();
 
        // Check if the source data is too big
        $sourceSize = $this->getSourceSize();
        $maxFileSize = $this->backend->maxFileSizeInternal();
        if ( $sourceSize > $maxFileSize ) {
            $status->fatal( 'backend-fail-maxsize', $this->params['dst'], $maxFileSize );
 
            return $status;
        }
        // Check if an incompatible destination file exists
        $sourceSha1 = $this->getSourceSha1Base36();
        $status->merge( $this->precheckDestExistence( $opPredicates, $sourceSize, $sourceSha1 ) );
        $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'], $sourceSize, $sourceSha1 );
        }
 
        return $status; // safe to call attempt()
    }
 
    protected function doAttempt() {
        if ( $this->overwriteSameCase ) {
            $status = StatusValue::newGood(); // nothing to do
        } else {
            // Create the file at the destination
            $status = $this->backend->createInternal( $this->setFlags( $this->params ) );
        }
 
        return $status;
    }
 
    protected function getSourceSize() {
        return strlen( $this->params['content'] );
    }
 
    protected function getSourceSha1Base36() {
        return \Wikimedia\base_convert( sha1( $this->params['content'] ), 16, 36, 31 );
    }
 
    public function storagePathsChanged() {
        return [ $this->params['dst'] ];
    }
}
 
class_alias( CreateFileOp::class, 'CreateFileOp' );