includes/libs/filebackend/fileop/StoreFileOp.php

   1 <?php
   2 /**
   3  * Helper class for representing operations with transaction support.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup FileBackend
  22  */
  23
  24 use Wikimedia\AtEase\AtEase;
  25
  26 /**
  27  * Store a file into the backend from a file on the file system.
  28  * Parameters for this operation are outlined in FileBackend::doOperations().
  29  */
  30 class StoreFileOp extends FileOp {
  31         protected function allowedParams() {
  32                 return [
  33                         [ 'src', 'dst' ],
  34                         [ 'overwrite', 'overwriteSame', 'headers' ],
  35                         [ 'src', 'dst' ]
  36                 ];
  37         }
  38
  39         protected function doPrecheck( array &$predicates ) {
  40                 $status = StatusValue::newGood();
  41
  42                 // Check if the source file exists in the file system and is not too big
  43                 if ( !is_file( $this->params['src'] ) ) {
  44                         $status->fatal( 'backend-fail-notexists', $this->params['src'] );
  45
  46                         return $status;
  47                 }
  48                 // Check if the source file is too big
  49                 $maxBytes = $this->backend->maxFileSizeInternal();
  50                 if ( filesize( $this->params['src'] ) > $maxBytes ) {
  51                         $status->fatal( 'backend-fail-maxsize', $this->params['dst'], $maxBytes );
  52
  53                         return $status;
  54                 }
  55                 // Check if an incompatible destination file exists
  56                 $status->merge( $this->precheckDestExistence( $predicates ) );
  57                 $this->params['dstExists'] = $this->destExists; // see FileBackendStore::setFileCache()
  58                 if ( $status->isOK() ) {
  59                         // Update file existence predicates
  60                         $predicates['exists'][$this->params['dst']] = true;
  61                         $predicates['sha1'][$this->params['dst']] = $this->sourceSha1;
  62                 }
  63
  64                 return $status; // safe to call attempt()
  65         }
  66
  67         protected function doAttempt() {
  68                 if ( $this->overwriteSameCase ) {
  69                         $status = StatusValue::newGood(); // nothing to do
  70                 } else {
  71                         // Store the file at the destination
  72                         $status = $this->backend->storeInternal( $this->setFlags( $this->params ) );
  73                 }
  74
  75                 return $status;
  76         }
  77
  78         protected function getSourceSha1Base36() {
  79                 AtEase::suppressWarnings();
  80                 $hash = sha1_file( $this->params['src'] );
  81                 AtEase::restoreWarnings();
  82                 if ( $hash !== false ) {
  83                         $hash = Wikimedia\base_convert( $hash, 16, 36, 31 );
  84                 }
  85
  86                 return $hash;
  87         }
  88
  89         public function storagePathsChanged() {
  90                 return [ $this->params['dst'] ];
  91         }
  92 }