includes/api/ApiQueryFilearchive.php

   1 <?php
   2 /**
   3  * API for MediaWiki 1.12+
   4  *
   5  * Created on May 10, 2010
   6  *
   7  * Copyright © 2010 Sam Reed
   8  * Copyright © 2008 Vasiliev Victor vasilvv@gmail.com,
   9  * based on ApiQueryAllpages.php
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  24  * http://www.gnu.org/copyleft/gpl.html
  25  *
  26  * @file
  27  */
  28
  29 if ( !defined( 'MEDIAWIKI' ) ) {
  30         // Eclipse helper - will be ignored in production
  31         require_once( 'ApiQueryBase.php' );
  32 }
  33
  34 /**
  35  * Query module to enumerate all deleted files.
  36  *
  37  * @ingroup API
  38  */
  39 class ApiQueryFilearchive extends ApiQueryBase {
  40
  41         public function __construct( $query, $moduleName ) {
  42                 parent::__construct( $query, $moduleName, 'fa' );
  43         }
  44
  45         public function execute() {
  46                 global $wgUser;
  47                 // Before doing anything at all, let's check permissions
  48                 if ( !$wgUser->isAllowed( 'deletedhistory' ) || $wgUser->isBlocked() ) {
  49                         $this->dieUsage( 'You don\'t have permission to view deleted file information', 'permissiondenied' );
  50                 }
  51
  52                 $db = $this->getDB();
  53
  54                 $params = $this->extractRequestParams();
  55
  56                 $prop = array_flip( $params['prop'] );
  57                 $fld_sha1 = isset( $prop['sha1'] );
  58                 $fld_timestamp = isset( $prop['timestamp'] );
  59                 $fld_user = isset( $prop['user'] );
  60                 $fld_size = isset( $prop['size'] );
  61                 $fld_dimensions = isset( $prop['dimensions'] );
  62                 $fld_description = isset( $prop['description'] ) || isset( $prop['parseddescription'] );
  63                 $fld_mime = isset( $prop['mime'] );
  64                 $fld_metadata = isset( $prop['metadata'] );
  65                 $fld_bitdepth = isset( $prop['bitdepth'] );
  66
  67                 $this->addTables( 'filearchive' );
  68
  69                 $this->addFields( array( 'fa_name', 'fa_deleted' ) );
  70                 $this->addFieldsIf( 'fa_storage_key', $fld_sha1 );
  71                 $this->addFieldsIf( 'fa_timestamp', $fld_timestamp );
  72                 $this->addFieldsIf( array( 'fa_user', 'fa_user_text' ), $fld_user );
  73                 $this->addFieldsIf( array( 'fa_height', 'fa_width', 'fa_size' ), $fld_dimensions || $fld_size );
  74                 $this->addFieldsIf( 'fa_description', $fld_description );
  75                 $this->addFieldsIf( array( 'fa_major_mime', 'fa_minor_mime' ), $fld_mime );
  76                 $this->addFieldsIf( 'fa_metadata', $fld_metadata );
  77                 $this->addFieldsIf( 'fa_bits', $fld_bitdepth );
  78
  79                 // Image filters
  80                 $dir = ( $params['dir'] == 'descending' ? 'older' : 'newer' );
  81                 $from = ( is_null( $params['from'] ) ? null : $this->titlePartToKey( $params['from'] ) );
  82                 $to = ( is_null( $params['to'] ) ? null : $this->titlePartToKey( $params['to'] ) );
  83                 $this->addWhereRange( 'fa_name', $dir, $from, $to );
  84                 if ( isset( $params['prefix'] ) ) {
  85                         $this->addWhere( 'fa_name' . $db->buildLike( $this->titlePartToKey( $params['prefix'] ), $db->anyString() ) );
  86                 }
  87
  88                 $sha1Set = isset( $params['sha1'] );
  89                 $sha1base36Set = isset( $params['sha1base36'] );
  90                 if ( $sha1Set || $sha1base36Set ) {
  91                         global $wgMiserMode;
  92                         if ( $wgMiserMode  ) {
  93                                 $this->dieUsage( 'Search by hash disabled in Miser Mode', 'hashsearchdisabled' );
  94                         }
  95
  96                         $sha1 = false;
  97                         if ( $sha1Set ) {
  98                                 if ( !$this->validateSha1Hash( $params['sha1'] ) ) {
  99                                         $this->dieUsage( 'The SHA1 hash provided is not valid', 'invalidsha1hash' );
 100                                 }
 101                                 $sha1 = wfBaseConvert( $params['sha1'], 16, 36, 31 );
 102                         } elseif ( $sha1base36Set ) {
 103                                 if ( !$this->validateSha1Base36Hash( $params['sha1base36'] ) ) {
 104                                         $this->dieUsage( 'The SHA1Base36 hash provided is not valid', 'invalidsha1base36hash' );
 105                                 }
 106                                 $sha1 = $params['sha1base36'];
 107                         }
 108                         if ( $sha1 ) {
 109                                 $this->addWhere( 'fa_storage_key ' . $db->buildLike( "{$sha1}.", $db->anyString() ) );
 110                         }
 111                 }
 112
 113                 if ( !$wgUser->isAllowed( 'suppressrevision' ) ) {
 114                         // Filter out revisions that the user is not allowed to see. There
 115                         // is no way to indicate that we have skipped stuff because the
 116                         // continuation parameter is fa_name
 117
 118                         // Note that this field is unindexed. This should however not be
 119                         // a big problem as files with fa_deleted are rare
 120                         $this->addWhereFld( 'fa_deleted', 0 );
 121                 }
 122
 123                 $limit = $params['limit'];
 124                 $this->addOption( 'LIMIT', $limit + 1 );
 125                 $this->addOption( 'ORDER BY', 'fa_name' .
 126                                                 ( $params['dir'] == 'descending' ? ' DESC' : '' ) );
 127
 128                 $res = $this->select( __METHOD__ );
 129
 130                 $count = 0;
 131                 $result = $this->getResult();
 132                 foreach ( $res as $row ) {
 133                         if ( ++$count > $limit ) {
 134                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 135                                 // TODO: Security issue - if the user has no right to view next title, it will still be shown
 136                                 $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->fa_name ) );
 137                                 break;
 138                         }
 139
 140                         $file = array();
 141                         $file['name'] = $row->fa_name;
 142                         $title = Title::makeTitle( NS_FILE, $row->fa_name );
 143                         self::addTitleInfo( $file, $title );
 144
 145                         if ( $fld_sha1 ) {
 146                                 $file['sha1'] = wfBaseConvert( LocalRepo::getHashFromKey( $row->fa_storage_key ), 36, 16, 40 );
 147                         }
 148                         if ( $fld_timestamp ) {
 149                                 $file['timestamp'] = wfTimestamp( TS_ISO_8601, $row->fa_timestamp );
 150                         }
 151                         if ( $fld_user ) {
 152                                 $file['userid'] = $row->fa_user;
 153                                 $file['user'] = $row->fa_user_text;
 154                         }
 155                         if ( $fld_size || $fld_dimensions ) {
 156                                 $file['size'] = $row->fa_size;
 157
 158                                 $pageCount = ArchivedFile::newFromRow( $row )->pageCount();
 159                                 if ( $pageCount !== false ) {
 160                                         $vals['pagecount'] = $pageCount;
 161                                 }
 162
 163                                 $file['height'] = $row->fa_height;
 164                                 $file['width'] = $row->fa_width;
 165                         }
 166                         if ( $fld_description ) {
 167                                 $file['description'] = $row->fa_description;
 168                                 if ( isset( $prop['parseddescription'] ) ) {
 169                                         $file['parseddescription'] = Linker::formatComment(
 170                                                 $row->fa_description, $title );
 171                                 }
 172                         }
 173                         if ( $fld_metadata ) {
 174                                 $file['metadata'] = $row->fa_metadata
 175                                                 ? ApiQueryImageInfo::processMetaData( unserialize( $row->fa_metadata ), $result )
 176                                                 : null;
 177                         }
 178                         if ( $fld_bitdepth ) {
 179                                 $file['bitdepth'] = $row->fa_bits;
 180                         }
 181                         if ( $fld_mime ) {
 182                                 $file['mime'] = "$row->fa_major_mime/$row->fa_minor_mime";
 183                         }
 184
 185                         if ( $row->fa_deleted & File::DELETED_FILE ) {
 186                                 $file['filehidden'] = '';
 187                         }
 188                         if ( $row->fa_deleted & File::DELETED_COMMENT ) {
 189                                 $file['commenthidden'] = '';
 190                         }
 191                         if ( $row->fa_deleted & File::DELETED_USER ) {
 192                                 $file['userhidden'] = '';
 193                         }
 194                         if ( $row->fa_deleted & File::DELETED_RESTRICTED ) {
 195                                 // This file is deleted for normal admins
 196                                 $file['suppressed'] = '';
 197                         }
 198
 199
 200                         $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $file );
 201                         if ( !$fit ) {
 202                                 $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->fa_name ) );
 203                                 break;
 204                         }
 205                 }
 206
 207                 $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'fa' );
 208         }
 209
 210         public function getAllowedParams() {
 211                 return array (
 212                         'from' => null,
 213                         'to' => null,
 214                         'prefix' => null,
 215                         'limit' => array(
 216                                 ApiBase::PARAM_DFLT => 10,
 217                                 ApiBase::PARAM_TYPE => 'limit',
 218                                 ApiBase::PARAM_MIN => 1,
 219                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 220                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 221                         ),
 222                         'dir' => array(
 223                                 ApiBase::PARAM_DFLT => 'ascending',
 224                                 ApiBase::PARAM_TYPE => array(
 225                                         'ascending',
 226                                         'descending'
 227                                 )
 228                         ),
 229                         'sha1' => null,
 230                         'sha1base36' => null,
 231                         'prop' => array(
 232                                 ApiBase::PARAM_DFLT => 'timestamp',
 233                                 ApiBase::PARAM_ISMULTI => true,
 234                                 ApiBase::PARAM_TYPE => array(
 235                                         'sha1',
 236                                         'timestamp',
 237                                         'user',
 238                                         'size',
 239                                         'dimensions',
 240                                         'description',
 241                                         'parseddescription',
 242                                         'mime',
 243                                         'metadata',
 244                                         'bitdepth'
 245                                 ),
 246                         ),
 247                 );
 248         }
 249
 250         public function getParamDescription() {
 251                 return array(
 252                         'from' => 'The image title to start enumerating from',
 253                         'to' => 'The image title to stop enumerating at',
 254                         'prefix' => 'Search for all image titles that begin with this value',
 255                         'dir' => 'The direction in which to list',
 256                         'limit' => 'How many images to return in total',
 257                         'sha1' => "SHA1 hash of image. Overrides {$this->getModulePrefix()}sha1base36. Disabled in Miser Mode",
 258                         'sha1base36' => 'SHA1 hash of image in base 36 (used in MediaWiki). Disabled in Miser Mode',
 259                         'prop' => array(
 260                                 'What image information to get:',
 261                                 ' sha1              - Adds SHA-1 hash for the image',
 262                                 ' timestamp         - Adds timestamp for the uploaded version',
 263                                 ' user              - Adds user who uploaded the image version',
 264                                 ' size              - Adds the size of the image in bytes and the height, width and page count (if applicable)',
 265                                 ' dimensions        - Alias for size',
 266                                 ' description       - Adds description the image version',
 267                                 ' parseddescription - Parse the description on the version',
 268                                 ' mime              - Adds MIME of the image',
 269                                 ' metadata          - Lists EXIF metadata for the version of the image',
 270                                 ' bitdepth          - Adds the bit depth of the version',
 271             ),
 272                 );
 273         }
 274
 275         public function getDescription() {
 276                 return 'Enumerate all deleted files sequentially';
 277         }
 278
 279         public function getPossibleErrors() {
 280                 return array_merge( parent::getPossibleErrors(), array(
 281                         array( 'code' => 'permissiondenied', 'info' => 'You don\'t have permission to view deleted file information' ),
 282                         array( 'code' => 'hashsearchdisabled', 'info' => 'Search by hash disabled in Miser Mode' ),
 283                         array( 'code' => 'invalidsha1hash', 'info' => 'The SHA1 hash provided is not valid' ),
 284                         array( 'code' => 'invalidsha1base36hash', 'info' => 'The SHA1Base36 hash provided is not valid' ),
 285                 ) );
 286         }
 287
 288         public function getExamples() {
 289                 return array(
 290                         'Simple Use',
 291                         ' Show a list of all deleted files',
 292                         '  api.php?action=query&list=filearchive',
 293                 );
 294         }
 295
 296         public function getVersion() {
 297                 return __CLASS__ . ': $Id$';
 298         }
 299 }