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, $prefix = 'ii' ) {
  40                 // We allow a subclass to override the prefix, to create a related API module.
  41                 // Some other parts of MediaWiki construct this with a null $prefix, which used to be ignored when this only took two arguments
  42                 if ( is_null( $prefix ) ) {
  43                         $prefix = 'ii';
  44                 }
  45                 parent::__construct( $query, $moduleName, $prefix );
  46         }
  47
  48         public function execute() {
  49                 $params = $this->extractRequestParams();
  50
  51                 $prop = array_flip( $params['prop'] );
  52
  53                 $scale = $this->getScale( $params );
  54
  55                 $pageIds = $this->getPageSet()->getAllTitlesByNamespace();
  56                 if ( !empty( $pageIds[NS_FILE] ) ) {
  57                         $titles = array_keys( $pageIds[NS_FILE] );
  58                         asort( $titles ); // Ensure the order is always the same
  59
  60                         $skip = false;
  61                         if ( !is_null( $params['continue'] ) ) {
  62                                 $skip = true;
  63                                 $cont = explode( '|', $params['continue'] );
  64                                 if ( count( $cont ) != 2 ) {
  65                                         $this->dieUsage( 'Invalid continue param. You should pass the original ' .
  66                                                         'value returned by the previous query', '_badcontinue' );
  67                                 }
  68                                 $fromTitle = strval( $cont[0] );
  69                                 $fromTimestamp = $cont[1];
  70                                 // Filter out any titles before $fromTitle
  71                                 foreach ( $titles as $key => $title ) {
  72                                         if ( $title < $fromTitle ) {
  73                                                 unset( $titles[$key] );
  74                                         } else {
  75                                                 break;
  76                                         }
  77                                 }
  78                         }
  79
  80                         $result = $this->getResult();
  81                         $images = RepoGroup::singleton()->findFiles( $titles );
  82                         foreach ( $images as $img ) {
  83                                 // Skip redirects
  84                                 if ( $img->getOriginalTitle()->isRedirect() ) {
  85                                         continue;
  86                                 }
  87
  88                                 $start = $skip ? $fromTimestamp : $params['start'];
  89                                 $pageId = $pageIds[NS_IMAGE][ $img->getOriginalTitle()->getDBkey() ];
  90
  91                                 $fit = $result->addValue(
  92                                         array( 'query', 'pages', intval( $pageId ) ),
  93                                         'imagerepository', $img->getRepoName()
  94                                 );
  95                                 if ( !$fit ) {
  96                                         if ( count( $pageIds[NS_IMAGE] ) == 1 ) {
  97                                                 // The user is screwed. imageinfo can't be solely
  98                                                 // responsible for exceeding the limit in this case,
  99                                                 // so set a query-continue that just returns the same
 100                                                 // thing again. When the violating queries have been
 101                                                 // out-continued, the result will get through
 102                                                 $this->setContinueEnumParameter( 'start',
 103                                                         wfTimestamp( TS_ISO_8601, $img->getTimestamp() ) );
 104                                         } else {
 105                                                 $this->setContinueEnumParameter( 'continue',
 106                                                         $this->getContinueStr( $img ) );
 107                                         }
 108                                         break;
 109                                 }
 110
 111                                 // Get information about the current version first
 112                                 // Check that the current version is within the start-end boundaries
 113                                 $gotOne = false;
 114                                 if (
 115                                         ( is_null( $start ) || $img->getTimestamp() <= $start ) &&
 116                                         ( is_null( $params['end'] ) || $img->getTimestamp() >= $params['end'] )
 117                                 )
 118                                 {
 119                                         $gotOne = true;
 120                                         $fit = $this->addPageSubItem( $pageId,
 121                                                 self::getInfo( $img, $prop, $result, $scale ) );
 122                                         if ( !$fit ) {
 123                                                 if ( count( $pageIds[NS_IMAGE] ) == 1 ) {
 124                                                         // See the 'the user is screwed' comment above
 125                                                         $this->setContinueEnumParameter( 'start',
 126                                                                 wfTimestamp( TS_ISO_8601, $img->getTimestamp() ) );
 127                                                 } else {
 128                                                         $this->setContinueEnumParameter( 'continue',
 129                                                                 $this->getContinueStr( $img ) );
 130                                                 }
 131                                                 break;
 132                                         }
 133                                 }
 134
 135                                 // Now get the old revisions
 136                                 // Get one more to facilitate query-continue functionality
 137                                 $count = ( $gotOne ? 1 : 0 );
 138                                 $oldies = $img->getHistory( $params['limit'] - $count + 1, $start, $params['end'] );
 139                                 foreach ( $oldies as $oldie ) {
 140                                         if ( ++$count > $params['limit'] ) {
 141                                                 // We've reached the extra one which shows that there are additional pages to be had. Stop here...
 142                                                 // Only set a query-continue if there was only one title
 143                                                 if ( count( $pageIds[NS_FILE] ) == 1 ) {
 144                                                         $this->setContinueEnumParameter( 'start',
 145                                                                 wfTimestamp( TS_ISO_8601, $oldie->getTimestamp() ) );
 146                                                 }
 147                                                 break;
 148                                         }
 149                                         $fit = $this->addPageSubItem( $pageId,
 150                                                 self::getInfo( $oldie, $prop, $result ) );
 151                                         if ( !$fit ) {
 152                                                 if ( count( $pageIds[NS_IMAGE] ) == 1 ) {
 153                                                         $this->setContinueEnumParameter( 'start',
 154                                                                 wfTimestamp( TS_ISO_8601, $oldie->getTimestamp() ) );
 155                                                 } else {
 156                                                         $this->setContinueEnumParameter( 'continue',
 157                                                                 $this->getContinueStr( $oldie ) );
 158                                                 }
 159                                                 break;
 160                                         }
 161                                 }
 162                                 if ( !$fit ) {
 163                                         break;
 164                                 }
 165                                 $skip = false;
 166                         }
 167
 168                         $data = $this->getResultData();
 169                         foreach ( $data['query']['pages'] as $pageid => $arr ) {
 170                                 if ( !isset( $arr['imagerepository'] ) ) {
 171                                         $result->addValue(
 172                                                 array( 'query', 'pages', $pageid ),
 173                                                 'imagerepository', ''
 174                                         );
 175                                 }
 176                                 // The above can't fail because it doesn't increase the result size
 177                         }
 178                 }
 179         }
 180
 181         /**
 182          * From parameters, construct a 'scale' array
 183          * @param $params Array:
 184          * @return Array or Null: key-val array of 'width' and 'height', or null
 185          */
 186         public function getScale( $params ) {
 187                 $p = $this->getModulePrefix();
 188                 if ( $params['urlheight'] != -1 && $params['urlwidth'] == -1 ) {
 189                         $this->dieUsage( "${p}urlheight cannot be used without {$p}urlwidth", "{$p}urlwidth" );
 190                 }
 191
 192                 if ( $params['urlwidth'] != -1 ) {
 193                         $scale = array();
 194                         $scale['width'] = $params['urlwidth'];
 195                         $scale['height'] = $params['urlheight'];
 196                 } else {
 197                         $scale = null;
 198                 }
 199                 return $scale;
 200         }
 201
 202
 203         /**
 204          * Get result information for an image revision
 205          *
 206          * @param $file File object
 207          * @param $prop Array of properties to get (in the keys)
 208          * @param $result ApiResult object
 209          * @param $scale Array containing 'width' and 'height' items, or null
 210          * @return Array: result array
 211          */
 212         static function getInfo( $file, $prop, $result, $scale = null ) {
 213                 $vals = array();
 214                 // Timestamp is shown even if the file is revdelete'd in interface
 215                 // so do same here.
 216                 if ( isset( $prop['timestamp'] ) ) {
 217                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $file->getTimestamp() );
 218                 }
 219
 220                 $user = isset( $prop['user'] );
 221                 $userid = isset( $prop['userid'] );
 222
 223                 if ( $user || $userid ) {
 224                         if ( $file->isDeleted( File::DELETED_USER ) ) {
 225                                 $vals['userhidden'] = '';
 226                         } else {
 227                                 if ( $user ) {
 228                                         $vals['user'] = $file->getUser();
 229                                 }
 230                                 if ( $userid ) {
 231                                         $vals['userid'] = $file->getUser( 'id' );
 232                                 }
 233                                 if ( !$file->getUser( 'id' ) ) {
 234                                         $vals['anon'] = '';
 235                                 }
 236                         }
 237                 }
 238
 239                 // This is shown even if the file is revdelete'd in interface
 240                 // so do same here.
 241                 if ( isset( $prop['size'] ) || isset( $prop['dimensions'] ) ) {
 242                         $vals['size'] = intval( $file->getSize() );
 243                         $vals['width'] = intval( $file->getWidth() );
 244                         $vals['height'] = intval( $file->getHeight() );
 245
 246                         $pageCount = $file->pageCount();
 247                         if ( $pageCount !== false ) {
 248                                 $vals['pagecount'] = $pageCount;
 249                         }
 250                 }
 251
 252                 $pcomment = isset( $prop['parsedcomment'] );
 253                 $comment = isset( $prop['comment'] );
 254
 255                 if ( $pcomment || $comment ) {
 256                         if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
 257                                 $vals['commenthidden'] = '';
 258                         } else {
 259                                 if ( $pcomment ) {
 260                                         global $wgUser;
 261                                         $vals['parsedcomment'] = $wgUser->getSkin()->formatComment(
 262                                                 $file->getDescription(), $file->getTitle() );
 263                                 }
 264                                 if ( $comment ) {
 265                                         $vals['comment'] = $file->getDescription();
 266                                 }
 267                         }
 268                 }
 269
 270                 $url = isset( $prop['url'] );
 271                 $sha1 = isset( $prop['sha1'] );
 272                 $meta = isset( $prop['metadata'] );
 273                 $mime = isset( $prop['mime'] );
 274                 $archive = isset( $prop['archivename'] );
 275                 $bitdepth = isset( $prop['bitdepth'] );
 276
 277                 if ( ( $url || $sha1 || $meta || $mime || $archive || $bitdepth )
 278                                 && $file->isDeleted( File::DELETED_FILE ) ) {
 279                         $vals['filehidden'] = '';
 280
 281                         //Early return, tidier than indenting all following things one level
 282                         return $vals;
 283                 }
 284
 285                 if ( $url ) {
 286                         if ( !is_null( $scale ) && !$file->isOld() ) {
 287                                 $mto = $file->transform( array( 'width' => $scale['width'], 'height' => $scale['height'] ) );
 288                                 if ( $mto && !$mto->isError() ) {
 289                                         $vals['thumburl'] = wfExpandUrl( $mto->getUrl() );
 290
 291                                         // bug 23834 - If the URL's are the same, we haven't resized it, so shouldn't give the wanted
 292                                         // thumbnail sizes for the thumbnail actual size
 293                                         if ( $mto->getUrl() !== $file->getUrl() ) {
 294                                                 $vals['thumbwidth'] = intval( $mto->getWidth() );
 295                                                 $vals['thumbheight'] = intval( $mto->getHeight() );
 296                                         } else {
 297                                                 $vals['thumbwidth'] = intval( $file->getWidth() );
 298                                                 $vals['thumbheight'] = intval( $file->getHeight() );
 299                                         }
 300
 301                                         if ( isset( $prop['thumbmime'] ) && $file->getHandler() ) {
 302                                                 list( $ext, $mime ) = $file->getHandler()->getThumbType(
 303                                                         substr( $mto->getPath(), strrpos( $mto->getPath(), '.' ) + 1 ),
 304                                                         $file->getMimeType(), $thumbParams );
 305                                                 $vals['thumbmime'] = $mime;
 306                                         }
 307                                 } else if ( $mto && $mto->isError() ) {
 308                                         $vals['thumberror'] = $mto->toText();
 309                                 }
 310                         }
 311                         $vals['url'] = $file->getFullURL();
 312                         $vals['descriptionurl'] = wfExpandUrl( $file->getDescriptionUrl() );
 313                 }
 314
 315                 if ( $sha1 ) {
 316                         $vals['sha1'] = wfBaseConvert( $file->getSha1(), 36, 16, 40 );
 317                 }
 318
 319                 if ( $meta ) {
 320                         $metadata = $file->getMetadata();
 321                         $vals['metadata'] = $metadata ? self::processMetaData( unserialize( $metadata ), $result ) : null;
 322                 }
 323
 324                 if ( $mime ) {
 325                         $vals['mime'] = $file->getMimeType();
 326                 }
 327
 328                 if ( $archive && $file->isOld() ) {
 329                         $vals['archivename'] = $file->getArchiveName();
 330                 }
 331
 332                 if ( $bitdepth ) {
 333                         $vals['bitdepth'] = $file->getBitDepth();
 334                 }
 335
 336                 return $vals;
 337         }
 338
 339         /*
 340          *
 341          * @param $metadata Array
 342          * @param $result ApiResult
 343          * @return Array
 344          */
 345         public static function processMetaData( $metadata, $result ) {
 346                 $retval = array();
 347                 if ( is_array( $metadata ) ) {
 348                         foreach ( $metadata as $key => $value ) {
 349                                 $r = array( 'name' => $key );
 350                                 if ( is_array( $value ) ) {
 351                                         $r['value'] = self::processMetaData( $value, $result );
 352                                 } else {
 353                                         $r['value'] = $value;
 354                                 }
 355                                 $retval[] = $r;
 356                         }
 357                 }
 358                 $result->setIndexedTagName( $retval, 'metadata' );
 359                 return $retval;
 360         }
 361
 362         public function getCacheMode( $params ) {
 363                 return 'public';
 364         }
 365
 366         private function getContinueStr( $img ) {
 367                 return $img->getOriginalTitle()->getText() .
 368                         '|' .  $img->getTimestamp();
 369         }
 370
 371         public function getAllowedParams() {
 372                 return array(
 373                         'prop' => array(
 374                                 ApiBase::PARAM_ISMULTI => true,
 375                                 ApiBase::PARAM_DFLT => 'timestamp|user',
 376                                 ApiBase::PARAM_TYPE => self::getPropertyNames()
 377                         ),
 378                         'limit' => array(
 379                                 ApiBase::PARAM_TYPE => 'limit',
 380                                 ApiBase::PARAM_DFLT => 1,
 381                                 ApiBase::PARAM_MIN => 1,
 382                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 383                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 384                         ),
 385                         'start' => array(
 386                                 ApiBase::PARAM_TYPE => 'timestamp'
 387                         ),
 388                         'end' => array(
 389                                 ApiBase::PARAM_TYPE => 'timestamp'
 390                         ),
 391                         'urlwidth' => array(
 392                                 ApiBase::PARAM_TYPE => 'integer',
 393                                 ApiBase::PARAM_DFLT => -1
 394                         ),
 395                         'urlheight' => array(
 396                                 ApiBase::PARAM_TYPE => 'integer',
 397                                 ApiBase::PARAM_DFLT => -1
 398                         ),
 399                         'continue' => null,
 400                 );
 401         }
 402
 403         /**
 404          * Returns all possible parameters to iiprop
 405          */
 406         public static function getPropertyNames() {
 407                 return array(
 408                         'timestamp',
 409                         'user',
 410                         'userid',
 411                         'comment',
 412                         'parsedcomment',
 413                         'url',
 414                         'size',
 415                         'dimensions', // For backwards compatibility with Allimages
 416                         'sha1',
 417                         'mime',
 418                         'thumbmime',
 419                         'metadata',
 420                         'archivename',
 421                         'bitdepth',
 422                 );
 423         }
 424
 425
 426         /**
 427          * Return the API documentation for the parameters.
 428          * @return {Array} parameter documentation.
 429          */
 430         public function getParamDescription() {
 431                 $p = $this->getModulePrefix();
 432                 return array(
 433                         'prop' => array(
 434                                 'What image information to get:',
 435                                 ' timestamp     - Adds timestamp for the uploaded version',
 436                                 ' user          - Adds the user who uploaded the image version',
 437                                 ' userid        - Add the user id that uploaded the image version',
 438                                 ' comment       - Comment on the version',
 439                                 ' parsedcomment - Parse the comment on the version',
 440                                 ' url           - Gives URL to the image and the description page',
 441                                 ' size          - Adds the size of the image in bytes and the height and width',
 442                                 ' dimensions    - Alias for size',
 443                                 ' sha1          - Adds sha1 hash for the image',
 444                                 ' mime          - Adds MIME of the image',
 445                                 ' thumbmime     - Adss MIME of the image thumbnail (requires url)',
 446                                 ' metadata      - Lists EXIF metadata for the version of the image',
 447                                 ' archivename   - Adds the file name of the archive version for non-latest versions',
 448                                 ' bitdepth      - Adds the bit depth of the version',
 449                         ),
 450                         'urlwidth' => array( "If {$p}prop=url is set, a URL to an image scaled to this width will be returned.",
 451                                             'Only the current version of the image can be scaled' ),
 452                         'urlheight' => "Similar to {$p}urlwidth. Cannot be used without {$p}urlwidth",
 453                         'limit' => 'How many image revisions to return',
 454                         'start' => 'Timestamp to start listing from',
 455                         'end' => 'Timestamp to stop listing at',
 456                         'continue' => 'If the query response includes a continue value, use it here to get another page of results'
 457                 );
 458         }
 459
 460         public function getDescription() {
 461                 return 'Returns image information and upload history';
 462         }
 463
 464         public function getPossibleErrors() {
 465                 return array_merge( parent::getPossibleErrors(), array(
 466                         array( 'code' => 'iiurlwidth', 'info' => 'iiurlheight cannot be used without iiurlwidth' ),
 467                 ) );
 468         }
 469
 470         protected function getExamples() {
 471                 return array(
 472                         'api.php?action=query&titles=File:Albert%20Einstein%20Head.jpg&prop=imageinfo',
 473                         'api.php?action=query&titles=File:Test.jpg&prop=imageinfo&iilimit=50&iiend=20071231235959&iiprop=timestamp|user|url',
 474                 );
 475         }
 476
 477         public function getVersion() {
 478                 return __CLASS__ . ': $Id$';
 479         }
 480 }