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<?php /** * Helper class for representing operations with transaction support. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file * @ingroup FileBackend */ namespace Wikimedia\FileBackend\FileOps; use StatusValue; use Wikimedia\FileBackend\FileBackend; /** * Change metadata for a file at the given storage path in the backend. * Parameters for this operation are outlined in FileBackend::doOperations(). */ class DescribeFileOp extends FileOp { protected function allowedParams() { return [ [ 'src' ], [ 'headers' ], [ 'src' ] ]; } protected function doPrecheck( FileStatePredicates $opPredicates, FileStatePredicates $batchPredicates ) { $status = StatusValue::newGood(); // Check source file existence $srcExists = $this->resolveFileExistence( $this->params['src'], $opPredicates ); if ( $srcExists === false ) { $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; } // Update file existence predicates since the operation is expected to be allowed to run $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; }; $batchPredicates->assumeFileExists( $this->params['src'], $srcSize, $srcSha1 ); return $status; // safe to call attempt() } protected function doAttempt() { // Update the source file's metadata return $this->backend->describeInternal( $this->setFlags( $this->params ) ); } public function storagePathsChanged() { return [ $this->params['src'] ]; } } /** @deprecated class alias since 1.43 */ class_alias( DescribeFileOp::class, 'DescribeFileOp' );
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