includes/api/ApiQueryImageInfo.php

   1 <?php
   2 /**
   3  * API for MediaWiki 1.8+
   4  *
   5  * Created on July 6, 2007
   6  *
   7  * Copyright © 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 if ( !defined( 'MEDIAWIKI' ) ) {
  28         // Eclipse helper - will be ignored in production
  29         require_once( 'ApiQueryBase.php' );
  30 }
  31
  32 /**
  33  * A query action to get image information and upload history.
  34  *
  35  * @ingroup API
  36  */
  37 class ApiQueryImageInfo extends ApiQueryBase {
  38
  39         public function __construct( $query, $moduleName ) {
  40                 parent::__construct( $query, $moduleName, 'ii' );
  41         }
  42
  43         public function execute() {
  44                 $params = $this->extractRequestParams();
  45
  46                 $prop = array_flip( $params['prop'] );
  47
  48                 if ( $params['urlheight'] != - 1 && $params['urlwidth'] == - 1 ) {
  49                         $this->dieUsage( 'iiurlheight cannot be used without iiurlwidth', 'iiurlwidth' );
  50                 }
  51
  52                 if ( $params['urlwidth'] != - 1 ) {
  53                         $scale = array();
  54                         $scale['width'] = $params['urlwidth'];
  55                         $scale['height'] = $params['urlheight'];
  56                 } else {
  57                         $scale = null;
  58                 }
  59
  60                 $pageIds = $this->getPageSet()->getAllTitlesByNamespace();
  61                 if ( !empty( $pageIds[NS_FILE] ) ) {
  62                         $titles = array_keys( $pageIds[NS_FILE] );
  63                         asort( $titles ); // Ensure the order is always the same
  64
  65                         $skip = false;
  66                         if ( !is_null( $params['continue'] ) ) {
  67                                 $skip = true;
  68                                 $cont = explode( '|', $params['continue'] );
  69                                 if ( count( $cont ) != 2 ) {
  70                                         $this->dieUsage( 'Invalid continue param. You should pass the original ' .
  71                                                         'value returned by the previous query', '_badcontinue' );
  72                                 }
  73                                 $fromTitle = strval( $cont[0] );
  74                                 $fromTimestamp = $cont[1];
  75                                 // Filter out any titles before $fromTitle
  76                                 foreach ( $titles as $key => $title ) {
  77                                         if ( $title < $fromTitle ) {
  78                                                 unset( $titles[$key] );
  79                                         } else {
  80                                                 break;
  81                                         }
  82                                 }
  83                         }
  84
  85                         $result = $this->getResult();
  86                         $images = RepoGroup::singleton()->findFiles( $titles );
  87                         foreach ( $images as $img ) {
  88                                 // Skip redirects
  89                                 if ( $img->getOriginalTitle()->isRedirect() ) {
  90                                         continue;
  91                                 }
  92
  93                                 $start = $skip ? $fromTimestamp : $params['start'];
  94                                 $pageId = $pageIds[NS_IMAGE][ $img->getOriginalTitle()->getDBkey() ];
  95
  96                                 $fit = $result->addValue(
  97                                         array( 'query', 'pages', intval( $pageId ) ),
  98                                         'imagerepository', $img->getRepoName()
  99                                 );
 100                                 if ( !$fit ) {
 101                                         if ( count( $pageIds[NS_IMAGE] ) == 1 ) {
 102                                                 // The user is screwed. imageinfo can't be solely
 103                                                 // responsible for exceeding the limit in this case,
 104                                                 // so set a query-continue that just returns the same
 105                                                 // thing again. When the violating queries have been
 106                                                 // out-continued, the result will get through
 107                                                 $this->setContinueEnumParameter( 'start',
 108                                                         wfTimestamp( TS_ISO_8601, $img->getTimestamp() ) );
 109                                         } else {
 110                                                 $this->setContinueEnumParameter( 'continue',
 111                                                         $this->getContinueStr( $img ) );
 112                                         }
 113                                         break;
 114                                 }
 115
 116                                 // Get information about the current version first
 117                                 // Check that the current version is within the start-end boundaries
 118                                 $gotOne = false;
 119                                 if (
 120                                         ( is_null( $start ) || $img->getTimestamp() <= $start ) &&
 121                                         ( is_null( $params['end'] ) || $img->getTimestamp() >= $params['end'] )
 122                                 )
 123                                 {
 124                                         $gotOne = true;
 125                                         $fit = $this->addPageSubItem( $pageId,
 126                                                 self::getInfo( $img, $prop, $result, $scale ) );
 127                                         if ( !$fit ) {
 128                                                 if ( count( $pageIds[NS_IMAGE] ) == 1 ) {
 129                                                         // See the 'the user is screwed' comment above
 130                                                         $this->setContinueEnumParameter( 'start',
 131                                                                 wfTimestamp( TS_ISO_8601, $img->getTimestamp() ) );
 132                                                 } else {
 133                                                         $this->setContinueEnumParameter( 'continue',
 134                                                                 $this->getContinueStr( $img ) );
 135                                                 }
 136                                                 break;
 137                                         }
 138                                 }
 139
 140                                 // Now get the old revisions
 141                                 // Get one more to facilitate query-continue functionality
 142                                 $count = ( $gotOne ? 1 : 0 );
 143                                 $oldies = $img->getHistory( $params['limit'] - $count + 1, $start, $params['end'] );
 144                                 foreach ( $oldies as $oldie ) {
 145                                         if ( ++$count > $params['limit'] ) {
 146                                                 // We've reached the extra one which shows that there are additional pages to be had. Stop here...
 147                                                 // Only set a query-continue if there was only one title
 148                                                 if ( count( $pageIds[NS_FILE] ) == 1 ) {
 149                                                         $this->setContinueEnumParameter( 'start',
 150                                                                 wfTimestamp( TS_ISO_8601, $oldie->getTimestamp() ) );
 151                                                 }
 152                                                 break;
 153                                         }
 154                                         $fit = $this->addPageSubItem( $pageId,
 155                                                 self::getInfo( $oldie, $prop, $result ) );
 156                                         if ( !$fit ) {
 157                                                 if ( count( $pageIds[NS_IMAGE] ) == 1 ) {
 158                                                         $this->setContinueEnumParameter( 'start',
 159                                                                 wfTimestamp( TS_ISO_8601, $oldie->getTimestamp() ) );
 160                                                 } else {
 161                                                         $this->setContinueEnumParameter( 'continue',
 162                                                                 $this->getContinueStr( $oldie ) );
 163                                                 }
 164                                                 break;
 165                                         }
 166                                 }
 167                                 if ( !$fit ) {
 168                                         break;
 169                                 }
 170                                 $skip = false;
 171                         }
 172
 173                         $data = $this->getResultData();
 174                         foreach ( $data['query']['pages'] as $pageid => $arr ) {
 175                                 if ( !isset( $arr['imagerepository'] ) ) {
 176                                         $result->addValue(
 177                                                 array( 'query', 'pages', $pageid ),
 178                                                 'imagerepository', ''
 179                                         );
 180                                 }
 181                                 // The above can't fail because it doesn't increase the result size
 182                         }
 183                 }
 184         }
 185
 186         /**
 187          * Get result information for an image revision
 188          *
 189          * @param $file File object
 190          * @param $prop Array of properties to get (in the keys)
 191          * @param $result ApiResult object
 192          * @param $scale Array containing 'width' and 'height' items, or null
 193          * @return Array: result array
 194          */
 195         static function getInfo( $file, $prop, $result, $scale = null ) {
 196                 $vals = array();
 197                 if ( isset( $prop['timestamp'] ) ) {
 198                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $file->getTimestamp() );
 199                 }
 200                 if ( isset( $prop['user'] ) ) {
 201                         $vals['user'] = $file->getUser();
 202                         if ( !$file->getUser( 'id' ) ) {
 203                                 $vals['anon'] = '';
 204                         }
 205                 }
 206                 if ( isset( $prop['size'] ) || isset( $prop['dimensions'] ) ) {
 207                         $vals['size'] = intval( $file->getSize() );
 208                         $vals['width'] = intval( $file->getWidth() );
 209                         $vals['height'] = intval( $file->getHeight() );
 210                 }
 211                 if ( isset( $prop['url'] ) ) {
 212                         if ( !is_null( $scale ) && !$file->isOld() ) {
 213                                 $mto = $file->transform( array( 'width' => $scale['width'], 'height' => $scale['height'] ) );
 214                                 if ( $mto && !$mto->isError() ) {
 215                                         $vals['thumburl'] = wfExpandUrl( $mto->getUrl() );
 216
 217                                         // bug 23834 - If the URL's are the same, we haven't resized it, so shouldn't give the wanted
 218                                         // thumbnail sizes for the thumbnail actual size
 219                                         if ( $mto->getUrl() !== $file->getUrl() ) {
 220                                                 $vals['thumbwidth'] = intval( $mto->getWidth() );
 221                                                 $vals['thumbheight'] = intval( $mto->getHeight() );
 222                                         } else {
 223                                                 $vals['thumbwidth'] = intval( $file->getWidth() );
 224                                                 $vals['thumbheight'] = intval( $file->getHeight() );
 225                                         }
 226
 227                                         if ( isset( $prop['thumbmime'] ) ) {
 228                                                 $thumbFile = UnregisteredLocalFile::newFromPath( $mto->getPath(), false );
 229                                                 $vals['thumbmime'] = $thumbFile->getMimeType();
 230                                         }
 231                                 }
 232                         }
 233                         $vals['url'] = $file->getFullURL();
 234                         $vals['descriptionurl'] = wfExpandUrl( $file->getDescriptionUrl() );
 235                 }
 236                 if ( isset( $prop['comment'] ) ) {
 237                         $vals['comment'] = $file->getDescription();
 238                 }
 239                 if ( isset( $prop['sha1'] ) ) {
 240                         $vals['sha1'] = wfBaseConvert( $file->getSha1(), 36, 16, 40 );
 241                 }
 242                 if ( isset( $prop['metadata'] ) ) {
 243                         $metadata = $file->getMetadata();
 244                         $vals['metadata'] = $metadata ? self::processMetaData( unserialize( $metadata ), $result ) : null;
 245                 }
 246                 if ( isset( $prop['mime'] ) ) {
 247                         $vals['mime'] = $file->getMimeType();
 248                 }
 249
 250                 if ( isset( $prop['archivename'] ) && $file->isOld() ) {
 251                         $vals['archivename'] = $file->getArchiveName();
 252                 }
 253
 254                 if ( isset( $prop['bitdepth'] ) ) {
 255                         $vals['bitdepth'] = $file->getBitDepth();
 256                 }
 257
 258                 return $vals;
 259         }
 260
 261         public static function processMetaData( $metadata, $result ) {
 262                 $retval = array();
 263                 if ( is_array( $metadata ) ) {
 264                         foreach ( $metadata as $key => $value ) {
 265                                 $r = array( 'name' => $key );
 266                                 if ( is_array( $value ) ) {
 267                                         $r['value'] = self::processMetaData( $value, $result );
 268                                 } else {
 269                                         $r['value'] = $value;
 270                                 }
 271                                 $retval[] = $r;
 272                         }
 273                 }
 274                 $result->setIndexedTagName( $retval, 'metadata' );
 275                 return $retval;
 276         }
 277
 278         public function getCacheMode( $params ) {
 279                 return 'public';
 280         }
 281
 282         private function getContinueStr( $img ) {
 283                 return $img->getOriginalTitle()->getText() .
 284                         '|' .  $img->getTimestamp();
 285         }
 286
 287         public function getAllowedParams() {
 288                 return array(
 289                         'prop' => array(
 290                                 ApiBase::PARAM_ISMULTI => true,
 291                                 ApiBase::PARAM_DFLT => 'timestamp|user',
 292                                 ApiBase::PARAM_TYPE => self::getPropertyNames()
 293                         ),
 294                         'limit' => array(
 295                                 ApiBase::PARAM_TYPE => 'limit',
 296                                 ApiBase::PARAM_DFLT => 1,
 297                                 ApiBase::PARAM_MIN => 1,
 298                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 299                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 300                         ),
 301                         'start' => array(
 302                                 ApiBase::PARAM_TYPE => 'timestamp'
 303                         ),
 304                         'end' => array(
 305                                 ApiBase::PARAM_TYPE => 'timestamp'
 306                         ),
 307                         'urlwidth' => array(
 308                                 ApiBase::PARAM_TYPE => 'integer',
 309                                 ApiBase::PARAM_DFLT => - 1
 310                         ),
 311                         'urlheight' => array(
 312                                 ApiBase::PARAM_TYPE => 'integer',
 313                                 ApiBase::PARAM_DFLT => - 1
 314                         ),
 315                         'continue' => null,
 316                 );
 317         }
 318
 319         /**
 320          * Returns all possible parameters to iiprop
 321          */
 322         public static function getPropertyNames() {
 323                 return array(
 324                         'timestamp',
 325                         'user',
 326                         'comment',
 327                         'url',
 328                         'size',
 329                         'dimensions', // For backwards compatibility with Allimages
 330                         'sha1',
 331                         'mime',
 332                         'thumbmime',
 333                         'metadata',
 334                         'archivename',
 335                         'bitdepth',
 336                 );
 337         }
 338
 339         public function getParamDescription() {
 340                 $p = $this->getModulePrefix();
 341                 return array(
 342                         'prop' => array(
 343                                 'What image information to get:',
 344                                 ' timestamp    - Adds timestamp for the uploaded version',
 345                                 ' user         - Adds user for uploaded the image version',
 346                                 ' comment      - Comment on the version',
 347                                 ' url          - Gives URL to the image and the description page',
 348                                 ' size         - Adds the size of the image in bytes and the height and width',
 349                                 ' dimensions   - Alias for size',
 350                                 ' sha1         - Adds sha1 hash for the image',
 351                                 ' mime         - Adds MIME of the image',
 352                                 ' thumbmime    - Adss MIME of the image thumbnail (requires url)',
 353                                 ' metadata     - Lists EXIF metadata for the version of the image',
 354                                 ' archivename  - Adds the file name of the archive version for non-latest versions',
 355                                 ' bitdepth     - Adds the bit depth of the version',
 356             ),
 357                         'limit' => 'How many image revisions to return',
 358                         'start' => 'Timestamp to start listing from',
 359                         'end' => 'Timestamp to stop listing at',
 360                         'urlwidth' => array( "If {$p}prop=url is set, a URL to an image scaled to this width will be returned.",
 361                                             'Only the current version of the image can be scaled' ),
 362                         'urlheight' => "Similar to {$p}urlwidth. Cannot be used without {$p}urlwidth",
 363                         'continue' => 'When more results are available, use this to continue',
 364                 );
 365         }
 366
 367         public function getDescription() {
 368                 return 'Returns image information and upload history';
 369         }
 370
 371         public function getPossibleErrors() {
 372                 return array_merge( parent::getPossibleErrors(), array(
 373                         array( 'code' => 'iiurlwidth', 'info' => 'iiurlheight cannot be used without iiurlwidth' ),
 374                 ) );
 375         }
 376
 377         protected function getExamples() {
 378                 return array(
 379                         'api.php?action=query&titles=File:Albert%20Einstein%20Head.jpg&prop=imageinfo',
 380                         'api.php?action=query&titles=File:Test.jpg&prop=imageinfo&iilimit=50&iiend=20071231235959&iiprop=timestamp|user|url',
 381                 );
 382         }
 383
 384         public function getVersion() {
 385                 return __CLASS__ . ': $Id$';
 386         }
 387 }