includes/filerepo/file/OldLocalFile.php

   1 <?php
   2 /**
   3  * Old file in the oldimage table.
   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 FileAbstraction
  22  */
  23
  24 /**
  25  * Class to represent a file in the oldimage table
  26  *
  27  * @ingroup FileAbstraction
  28  */
  29 class OldLocalFile extends LocalFile {
  30         var $requestedTime, $archive_name;
  31
  32         const CACHE_VERSION = 1;
  33         const MAX_CACHE_ROWS = 20;
  34
  35         /**
  36          * @param $title Title
  37          * @param $repo FileRepo
  38          * @param $time null
  39          * @return OldLocalFile
  40          * @throws MWException
  41          */
  42         static function newFromTitle( $title, $repo, $time = null ) {
  43                 # The null default value is only here to avoid an E_STRICT
  44                 if ( $time === null ) {
  45                         throw new MWException( __METHOD__ . ' got null for $time parameter' );
  46                 }
  47                 return new self( $title, $repo, $time, null );
  48         }
  49
  50         /**
  51          * @param $title Title
  52          * @param $repo FileRepo
  53          * @param $archiveName
  54          * @return OldLocalFile
  55          */
  56         static function newFromArchiveName( $title, $repo, $archiveName ) {
  57                 return new self( $title, $repo, null, $archiveName );
  58         }
  59
  60         /**
  61          * @param $row
  62          * @param $repo FileRepo
  63          * @return OldLocalFile
  64          */
  65         static function newFromRow( $row, $repo ) {
  66                 $title = Title::makeTitle( NS_FILE, $row->oi_name );
  67                 $file = new self( $title, $repo, null, $row->oi_archive_name );
  68                 $file->loadFromRow( $row, 'oi_' );
  69                 return $file;
  70         }
  71
  72         /**
  73          * Create a OldLocalFile from a SHA-1 key
  74          * Do not call this except from inside a repo class.
  75          *
  76          * @param string $sha1 base-36 SHA-1
  77          * @param $repo LocalRepo
  78          * @param string|bool $timestamp MW_timestamp (optional)
  79          *
  80          * @return bool|OldLocalFile
  81          */
  82         static function newFromKey( $sha1, $repo, $timestamp = false ) {
  83                 $dbr = $repo->getSlaveDB();
  84
  85                 $conds = array( 'oi_sha1' => $sha1 );
  86                 if ( $timestamp ) {
  87                         $conds['oi_timestamp'] = $dbr->timestamp( $timestamp );
  88                 }
  89
  90                 $row = $dbr->selectRow( 'oldimage', self::selectFields(), $conds, __METHOD__ );
  91                 if ( $row ) {
  92                         return self::newFromRow( $row, $repo );
  93                 } else {
  94                         return false;
  95                 }
  96         }
  97
  98         /**
  99          * Fields in the oldimage table
 100          * @return array
 101          */
 102         static function selectFields() {
 103                 return array(
 104                         'oi_name',
 105                         'oi_archive_name',
 106                         'oi_size',
 107                         'oi_width',
 108                         'oi_height',
 109                         'oi_metadata',
 110                         'oi_bits',
 111                         'oi_media_type',
 112                         'oi_major_mime',
 113                         'oi_minor_mime',
 114                         'oi_description',
 115                         'oi_user',
 116                         'oi_user_text',
 117                         'oi_timestamp',
 118                         'oi_deleted',
 119                         'oi_sha1',
 120                 );
 121         }
 122
 123         /**
 124          * @param $title Title
 125          * @param $repo FileRepo
 126          * @param string $time timestamp or null to load by archive name
 127          * @param string $archiveName archive name or null to load by timestamp
 128          * @throws MWException
 129          */
 130         function __construct( $title, $repo, $time, $archiveName ) {
 131                 parent::__construct( $title, $repo );
 132                 $this->requestedTime = $time;
 133                 $this->archive_name = $archiveName;
 134                 if ( is_null( $time ) && is_null( $archiveName ) ) {
 135                         throw new MWException( __METHOD__ . ': must specify at least one of $time or $archiveName' );
 136                 }
 137         }
 138
 139         /**
 140          * @return bool
 141          */
 142         function getCacheKey() {
 143                 return false;
 144         }
 145
 146         /**
 147          * @return String
 148          */
 149         function getArchiveName() {
 150                 if ( !isset( $this->archive_name ) ) {
 151                         $this->load();
 152                 }
 153                 return $this->archive_name;
 154         }
 155
 156         /**
 157          * @return bool
 158          */
 159         function isOld() {
 160                 return true;
 161         }
 162
 163         /**
 164          * @return bool
 165          */
 166         function isVisible() {
 167                 return $this->exists() && !$this->isDeleted( File::DELETED_FILE );
 168         }
 169
 170         function loadFromDB() {
 171                 wfProfileIn( __METHOD__ );
 172
 173                 $this->dataLoaded = true;
 174                 $dbr = $this->repo->getSlaveDB();
 175                 $conds = array( 'oi_name' => $this->getName() );
 176                 if ( is_null( $this->requestedTime ) ) {
 177                         $conds['oi_archive_name'] = $this->archive_name;
 178                 } else {
 179                         $conds['oi_timestamp'] = $dbr->timestamp( $this->requestedTime );
 180                 }
 181                 $row = $dbr->selectRow( 'oldimage', $this->getCacheFields( 'oi_' ),
 182                         $conds, __METHOD__, array( 'ORDER BY' => 'oi_timestamp DESC' ) );
 183                 if ( $row ) {
 184                         $this->loadFromRow( $row, 'oi_' );
 185                 } else {
 186                         $this->fileExists = false;
 187                 }
 188
 189                 wfProfileOut( __METHOD__ );
 190         }
 191
 192         /**
 193          * Load lazy file metadata from the DB
 194          */
 195         protected function loadExtraFromDB() {
 196                 wfProfileIn( __METHOD__ );
 197
 198                 $this->extraDataLoaded = true;
 199                 $dbr = $this->repo->getSlaveDB();
 200                 $conds = array( 'oi_name' => $this->getName() );
 201                 if ( is_null( $this->requestedTime ) ) {
 202                         $conds['oi_archive_name'] = $this->archive_name;
 203                 } else {
 204                         $conds['oi_timestamp'] = $dbr->timestamp( $this->requestedTime );
 205                 }
 206                 // In theory the file could have just been renamed/deleted...oh well
 207                 $row = $dbr->selectRow( 'oldimage', $this->getLazyCacheFields( 'oi_' ),
 208                         $conds, __METHOD__, array( 'ORDER BY' => 'oi_timestamp DESC' ) );
 209
 210                 if ( !$row ) { // fallback to master
 211                         $dbr = $this->repo->getMasterDB();
 212                         $row = $dbr->selectRow( 'oldimage', $this->getLazyCacheFields( 'oi_' ),
 213                                 $conds, __METHOD__, array( 'ORDER BY' => 'oi_timestamp DESC' ) );
 214                 }
 215
 216                 if ( $row ) {
 217                         foreach ( $this->unprefixRow( $row, 'oi_' ) as $name => $value ) {
 218                                 $this->$name = $value;
 219                         }
 220                 } else {
 221                         wfProfileOut( __METHOD__ );
 222                         throw new MWException( "Could not find data for image '{$this->archive_name}'." );
 223                 }
 224
 225                 wfProfileOut( __METHOD__ );
 226         }
 227
 228         /**
 229          * @param $prefix string
 230          * @return array
 231          */
 232         function getCacheFields( $prefix = 'img_' ) {
 233                 $fields = parent::getCacheFields( $prefix );
 234                 $fields[] = $prefix . 'archive_name';
 235                 $fields[] = $prefix . 'deleted';
 236                 return $fields;
 237         }
 238
 239         /**
 240          * @return string
 241          */
 242         function getRel() {
 243                 return 'archive/' . $this->getHashPath() . $this->getArchiveName();
 244         }
 245
 246         /**
 247          * @return string
 248          */
 249         function getUrlRel() {
 250                 return 'archive/' . $this->getHashPath() . rawurlencode( $this->getArchiveName() );
 251         }
 252
 253         function upgradeRow() {
 254                 wfProfileIn( __METHOD__ );
 255                 $this->loadFromFile();
 256
 257                 # Don't destroy file info of missing files
 258                 if ( !$this->fileExists ) {
 259                         wfDebug( __METHOD__ . ": file does not exist, aborting\n" );
 260                         wfProfileOut( __METHOD__ );
 261                         return;
 262                 }
 263
 264                 $dbw = $this->repo->getMasterDB();
 265                 list( $major, $minor ) = self::splitMime( $this->mime );
 266
 267                 wfDebug( __METHOD__ . ': upgrading ' . $this->archive_name . " to the current schema\n" );
 268                 $dbw->update( 'oldimage',
 269                         array(
 270                                 'oi_size'       => $this->size, // sanity
 271                                 'oi_width'      => $this->width,
 272                                 'oi_height'     => $this->height,
 273                                 'oi_bits'       => $this->bits,
 274                                 'oi_media_type' => $this->media_type,
 275                                 'oi_major_mime' => $major,
 276                                 'oi_minor_mime' => $minor,
 277                                 'oi_metadata'   => $this->metadata,
 278                                 'oi_sha1'       => $this->sha1,
 279                         ), array(
 280                                 'oi_name' => $this->getName(),
 281                                 'oi_archive_name' => $this->archive_name ),
 282                         __METHOD__
 283                 );
 284                 wfProfileOut( __METHOD__ );
 285         }
 286
 287         /**
 288          * @param $field Integer: one of DELETED_* bitfield constants
 289          *               for file or revision rows
 290          * @return bool
 291          */
 292         function isDeleted( $field ) {
 293                 $this->load();
 294                 return ( $this->deleted & $field ) == $field;
 295         }
 296
 297         /**
 298          * Returns bitfield value
 299          * @return int
 300          */
 301         function getVisibility() {
 302                 $this->load();
 303                 return (int)$this->deleted;
 304         }
 305
 306         /**
 307          * Determine if the current user is allowed to view a particular
 308          * field of this image file, if it's marked as deleted.
 309          *
 310          * @param $field Integer
 311          * @param $user User object to check, or null to use $wgUser
 312          * @return bool
 313          */
 314         function userCan( $field, User $user = null ) {
 315                 $this->load();
 316                 return Revision::userCanBitfield( $this->deleted, $field, $user );
 317         }
 318
 319         /**
 320          * Upload a file directly into archive. Generally for Special:Import.
 321          *
 322          * @param string $srcPath File system path of the source file
 323          * @param string $archiveName Full archive name of the file, in the form
 324          *     $timestamp!$filename, where $filename must match $this->getName()
 325          *
 326          * @param $timestamp string
 327          * @param $comment string
 328          * @param $user
 329          * @param $flags int
 330          * @return FileRepoStatus
 331          */
 332         function uploadOld( $srcPath, $archiveName, $timestamp, $comment, $user, $flags = 0 ) {
 333                 $this->lock();
 334
 335                 $dstRel = 'archive/' . $this->getHashPath() . $archiveName;
 336                 $status = $this->publishTo( $srcPath, $dstRel,
 337                         $flags & File::DELETE_SOURCE ? FileRepo::DELETE_SOURCE : 0
 338                 );
 339
 340                 if ( $status->isGood() ) {
 341                         if ( !$this->recordOldUpload( $srcPath, $archiveName, $timestamp, $comment, $user ) ) {
 342                                 $status->fatal( 'filenotfound', $srcPath );
 343                         }
 344                 }
 345
 346                 $this->unlock();
 347
 348                 return $status;
 349         }
 350
 351         /**
 352          * Record a file upload in the oldimage table, without adding log entries.
 353          *
 354          * @param string $srcPath File system path to the source file
 355          * @param string $archiveName The archive name of the file
 356          * @param $timestamp string
 357          * @param string $comment Upload comment
 358          * @param $user User User who did this upload
 359          * @return bool
 360          */
 361         function recordOldUpload( $srcPath, $archiveName, $timestamp, $comment, $user ) {
 362                 $dbw = $this->repo->getMasterDB();
 363                 $dbw->begin( __METHOD__ );
 364
 365                 $dstPath = $this->repo->getZonePath( 'public' ) . '/' . $this->getRel();
 366                 $props = $this->repo->getFileProps( $dstPath );
 367                 if ( !$props['fileExists'] ) {
 368                         return false;
 369                 }
 370
 371                 $dbw->insert( 'oldimage',
 372                         array(
 373                                 'oi_name'         => $this->getName(),
 374                                 'oi_archive_name' => $archiveName,
 375                                 'oi_size'         => $props['size'],
 376                                 'oi_width'        => intval( $props['width'] ),
 377                                 'oi_height'       => intval( $props['height'] ),
 378                                 'oi_bits'         => $props['bits'],
 379                                 'oi_timestamp'    => $dbw->timestamp( $timestamp ),
 380                                 'oi_description'  => $comment,
 381                                 'oi_user'         => $user->getId(),
 382                                 'oi_user_text'    => $user->getName(),
 383                                 'oi_metadata'     => $props['metadata'],
 384                                 'oi_media_type'   => $props['media_type'],
 385                                 'oi_major_mime'   => $props['major_mime'],
 386                                 'oi_minor_mime'   => $props['minor_mime'],
 387                                 'oi_sha1'         => $props['sha1'],
 388                         ), __METHOD__
 389                 );
 390
 391                 $dbw->commit( __METHOD__ );
 392
 393                 return true;
 394         }
 395
 396 }