includes/api/ApiQueryImageInfo.php

   1 <?php
   2 /**
   3  *
   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 /**
  28  * A query action to get image information and upload history.
  29  *
  30  * @ingroup API
  31  */
  32 class ApiQueryImageInfo extends ApiQueryBase {
  33         const TRANSFORM_LIMIT = 50;
  34         private static $transformCount = 0;
  35
  36         public function __construct( ApiQuery $query, $moduleName, $prefix = 'ii' ) {
  37                 // We allow a subclass to override the prefix, to create a related API
  38                 // module. Some other parts of MediaWiki construct this with a null
  39                 // $prefix, which used to be ignored when this only took two arguments
  40                 if ( is_null( $prefix ) ) {
  41                         $prefix = 'ii';
  42                 }
  43                 parent::__construct( $query, $moduleName, $prefix );
  44         }
  45
  46         public function execute() {
  47                 $params = $this->extractRequestParams();
  48
  49                 $prop = array_flip( $params['prop'] );
  50
  51                 $scale = $this->getScale( $params );
  52
  53                 $opts = array(
  54                         'version' => $params['metadataversion'],
  55                         'language' => $params['extmetadatalanguage'],
  56                         'multilang' => $params['extmetadatamultilang'],
  57                         'extmetadatafilter' => $params['extmetadatafilter'],
  58                         'revdelUser' => $this->getUser(),
  59                 );
  60
  61                 $pageIds = $this->getPageSet()->getGoodAndMissingTitlesByNamespace();
  62                 if ( !empty( $pageIds[NS_FILE] ) ) {
  63                         $titles = array_keys( $pageIds[NS_FILE] );
  64                         asort( $titles ); // Ensure the order is always the same
  65
  66                         $fromTitle = null;
  67                         if ( !is_null( $params['continue'] ) ) {
  68                                 $cont = explode( '|', $params['continue'] );
  69                                 $this->dieContinueUsageIf( count( $cont ) != 2 );
  70                                 $fromTitle = strval( $cont[0] );
  71                                 $fromTimestamp = $cont[1];
  72                                 // Filter out any titles before $fromTitle
  73                                 foreach ( $titles as $key => $title ) {
  74                                         if ( $title < $fromTitle ) {
  75                                                 unset( $titles[$key] );
  76                                         } else {
  77                                                 break;
  78                                         }
  79                                 }
  80                         }
  81
  82                         $user = $this->getUser();
  83                         $findTitles = array_map( function ( $title ) use ( $user ) {
  84                                 return array(
  85                                         'title' => $title,
  86                                         'private' => $user,
  87                                 );
  88                         }, $titles );
  89
  90                         if ( $params['localonly'] ) {
  91                                 $images = RepoGroup::singleton()->getLocalRepo()->findFiles( $findTitles );
  92                         } else {
  93                                 $images = RepoGroup::singleton()->findFiles( $findTitles );
  94                         }
  95
  96                         $result = $this->getResult();
  97                         foreach ( $titles as $title ) {
  98                                 $pageId = $pageIds[NS_FILE][$title];
  99                                 $start = $title === $fromTitle ? $fromTimestamp : $params['start'];
 100
 101                                 if ( !isset( $images[$title] ) ) {
 102                                         if ( isset( $prop['uploadwarning'] ) ) {
 103                                                 // Uploadwarning needs info about non-existing files
 104                                                 $images[$title] = wfLocalFile( $title );
 105                                         } else {
 106                                                 $result->addValue(
 107                                                         array( 'query', 'pages', intval( $pageId ) ),
 108                                                         'imagerepository', ''
 109                                                 );
 110                                                 // The above can't fail because it doesn't increase the result size
 111                                                 continue;
 112                                         }
 113                                 }
 114
 115                                 /** @var $img File */
 116                                 $img = $images[$title];
 117
 118                                 if ( self::getTransformCount() >= self::TRANSFORM_LIMIT ) {
 119                                         if ( count( $pageIds[NS_FILE] ) == 1 ) {
 120                                                 // See the 'the user is screwed' comment below
 121                                                 $this->setContinueEnumParameter( 'start',
 122                                                         $start !== null ? $start : wfTimestamp( TS_ISO_8601, $img->getTimestamp() )
 123                                                 );
 124                                         } else {
 125                                                 $this->setContinueEnumParameter( 'continue',
 126                                                         $this->getContinueStr( $img, $start ) );
 127                                         }
 128                                         break;
 129                                 }
 130
 131                                 $fit = $result->addValue(
 132                                         array( 'query', 'pages', intval( $pageId ) ),
 133                                         'imagerepository', $img->getRepoName()
 134                                 );
 135                                 if ( !$fit ) {
 136                                         if ( count( $pageIds[NS_FILE] ) == 1 ) {
 137                                                 // The user is screwed. imageinfo can't be solely
 138                                                 // responsible for exceeding the limit in this case,
 139                                                 // so set a query-continue that just returns the same
 140                                                 // thing again. When the violating queries have been
 141                                                 // out-continued, the result will get through
 142                                                 $this->setContinueEnumParameter( 'start',
 143                                                         $start !== null ? $start : wfTimestamp( TS_ISO_8601, $img->getTimestamp() )
 144                                                 );
 145                                         } else {
 146                                                 $this->setContinueEnumParameter( 'continue',
 147                                                         $this->getContinueStr( $img, $start ) );
 148                                         }
 149                                         break;
 150                                 }
 151
 152                                 // Check if we can make the requested thumbnail, and get transform parameters.
 153                                 $finalThumbParams = $this->mergeThumbParams( $img, $scale, $params['urlparam'] );
 154
 155                                 // Get information about the current version first
 156                                 // Check that the current version is within the start-end boundaries
 157                                 $gotOne = false;
 158                                 if (
 159                                         ( is_null( $start ) || $img->getTimestamp() <= $start ) &&
 160                                         ( is_null( $params['end'] ) || $img->getTimestamp() >= $params['end'] )
 161                                 ) {
 162                                         $gotOne = true;
 163
 164                                         $fit = $this->addPageSubItem( $pageId,
 165                                                 self::getInfo( $img, $prop, $result,
 166                                                         $finalThumbParams, $opts
 167                                                 )
 168                                         );
 169                                         if ( !$fit ) {
 170                                                 if ( count( $pageIds[NS_FILE] ) == 1 ) {
 171                                                         // See the 'the user is screwed' comment above
 172                                                         $this->setContinueEnumParameter( 'start',
 173                                                                 wfTimestamp( TS_ISO_8601, $img->getTimestamp() ) );
 174                                                 } else {
 175                                                         $this->setContinueEnumParameter( 'continue',
 176                                                                 $this->getContinueStr( $img ) );
 177                                                 }
 178                                                 break;
 179                                         }
 180                                 }
 181
 182                                 // Now get the old revisions
 183                                 // Get one more to facilitate query-continue functionality
 184                                 $count = ( $gotOne ? 1 : 0 );
 185                                 $oldies = $img->getHistory( $params['limit'] - $count + 1, $start, $params['end'] );
 186                                 /** @var $oldie File */
 187                                 foreach ( $oldies as $oldie ) {
 188                                         if ( ++$count > $params['limit'] ) {
 189                                                 // We've reached the extra one which shows that there are
 190                                                 // additional pages to be had. Stop here...
 191                                                 // Only set a query-continue if there was only one title
 192                                                 if ( count( $pageIds[NS_FILE] ) == 1 ) {
 193                                                         $this->setContinueEnumParameter( 'start',
 194                                                                 wfTimestamp( TS_ISO_8601, $oldie->getTimestamp() ) );
 195                                                 }
 196                                                 break;
 197                                         }
 198                                         $fit = self::getTransformCount() < self::TRANSFORM_LIMIT &&
 199                                                 $this->addPageSubItem( $pageId,
 200                                                         self::getInfo( $oldie, $prop, $result,
 201                                                                 $finalThumbParams, $opts
 202                                                         )
 203                                                 );
 204                                         if ( !$fit ) {
 205                                                 if ( count( $pageIds[NS_FILE] ) == 1 ) {
 206                                                         $this->setContinueEnumParameter( 'start',
 207                                                                 wfTimestamp( TS_ISO_8601, $oldie->getTimestamp() ) );
 208                                                 } else {
 209                                                         $this->setContinueEnumParameter( 'continue',
 210                                                                 $this->getContinueStr( $oldie ) );
 211                                                 }
 212                                                 break;
 213                                         }
 214                                 }
 215                                 if ( !$fit ) {
 216                                         break;
 217                                 }
 218                         }
 219                 }
 220         }
 221
 222         /**
 223          * From parameters, construct a 'scale' array
 224          * @param array $params Parameters passed to api.
 225          * @return array|null Key-val array of 'width' and 'height', or null
 226          */
 227         public function getScale( $params ) {
 228                 $p = $this->getModulePrefix();
 229
 230                 if ( $params['urlwidth'] != -1 ) {
 231                         $scale = array();
 232                         $scale['width'] = $params['urlwidth'];
 233                         $scale['height'] = $params['urlheight'];
 234                 } elseif ( $params['urlheight'] != -1 ) {
 235                         // Height is specified but width isn't
 236                         // Don't set $scale['width']; this signals mergeThumbParams() to fill it with the image's width
 237                         $scale = array();
 238                         $scale['height'] = $params['urlheight'];
 239                 } else {
 240                         if ( $params['urlparam'] ) {
 241                                 // Audio files might not have a width/height.
 242                                 $scale = array();
 243                         } else {
 244                                 $scale = null;
 245                         }
 246                 }
 247
 248                 return $scale;
 249         }
 250
 251         /** Validate and merge scale parameters with handler thumb parameters, give error if invalid.
 252          *
 253          * We do this later than getScale, since we need the image
 254          * to know which handler, since handlers can make their own parameters.
 255          * @param File $image Image that params are for.
 256          * @param array $thumbParams Thumbnail parameters from getScale
 257          * @param string $otherParams String of otherParams (iiurlparam).
 258          * @return array Array of parameters for transform.
 259          */
 260         protected function mergeThumbParams( $image, $thumbParams, $otherParams ) {
 261                 if ( $thumbParams === null ) {
 262                         // No scaling requested
 263                         return null;
 264                 }
 265                 if ( !isset( $thumbParams['width'] ) && isset( $thumbParams['height'] ) ) {
 266                         // We want to limit only by height in this situation, so pass the
 267                         // image's full width as the limiting width. But some file types
 268                         // don't have a width of their own, so pick something arbitrary so
 269                         // thumbnailing the default icon works.
 270                         if ( $image->getWidth() <= 0 ) {
 271                                 $thumbParams['width'] = max( $this->getConfig()->get( 'ThumbLimits' ) );
 272                         } else {
 273                                 $thumbParams['width'] = $image->getWidth();
 274                         }
 275                 }
 276
 277                 if ( !$otherParams ) {
 278                         $this->checkParameterNormalise( $image, $thumbParams );
 279                         return $thumbParams;
 280                 }
 281                 $p = $this->getModulePrefix();
 282
 283                 $h = $image->getHandler();
 284                 if ( !$h ) {
 285                         $this->setWarning( 'Could not create thumbnail because ' .
 286                                 $image->getName() . ' does not have an associated image handler' );
 287
 288                         return $thumbParams;
 289                 }
 290
 291                 $paramList = $h->parseParamString( $otherParams );
 292                 if ( !$paramList ) {
 293                         // Just set a warning (instead of dieUsage), as in many cases
 294                         // we could still render the image using width and height parameters,
 295                         // and this type of thing could happen between different versions of
 296                         // handlers.
 297                         $this->setWarning( "Could not parse {$p}urlparam for " . $image->getName()
 298                                 . '. Using only width and height' );
 299                         $this->checkParameterNormalise( $image, $thumbParams );
 300                         return $thumbParams;
 301                 }
 302
 303                 if ( isset( $paramList['width'] ) && isset( $thumbParams['width'] ) ) {
 304                         if ( intval( $paramList['width'] ) != intval( $thumbParams['width'] ) ) {
 305                                 $this->setWarning( "Ignoring width value set in {$p}urlparam ({$paramList['width']}) "
 306                                         . "in favor of width value derived from {$p}urlwidth/{$p}urlheight "
 307                                         . "({$thumbParams['width']})" );
 308                         }
 309                 }
 310
 311                 foreach ( $paramList as $name => $value ) {
 312                         if ( !$h->validateParam( $name, $value ) ) {
 313                                 $this->dieUsage( "Invalid value for {$p}urlparam ($name=$value)", "urlparam" );
 314                         }
 315                 }
 316
 317                 $finalParams = $thumbParams + $paramList;
 318                 $this->checkParameterNormalise( $image, $finalParams );
 319                 return $finalParams;
 320         }
 321
 322         /**
 323          * Verify that the final image parameters can be normalised.
 324          *
 325          * This doesn't use the normalised parameters, since $file->transform
 326          * expects the pre-normalised parameters, but doing the normalisation
 327          * allows us to catch certain error conditions early (such as missing
 328          * required parameter).
 329          *
 330          * @param $image File
 331          * @param $finalParams array List of parameters to transform image with
 332          */
 333         protected function checkParameterNormalise( $image, $finalParams ) {
 334                 $h = $image->getHandler();
 335                 if ( !$h ) {
 336                         return;
 337                 }
 338                 // Note: normaliseParams modifies the array in place, but we aren't interested
 339                 // in the actual normalised version, only if we can actually normalise them,
 340                 // so we use the functions scope to throw away the normalisations.
 341                 if ( !$h->normaliseParams( $image, $finalParams ) ) {
 342                         $this->dieUsage( "Could not normalise image parameters for " . $image->getName(), "urlparamnormal" );
 343                 }
 344         }
 345
 346         /**
 347          * Get result information for an image revision
 348          *
 349          * @param File $file
 350          * @param array $prop Array of properties to get (in the keys)
 351          * @param ApiResult $result
 352          * @param array $thumbParams Containing 'width' and 'height' items, or null
 353          * @param array|bool|string $opts Options for data fetching.
 354          *   This is an array consisting of the keys:
 355          *    'version': The metadata version for the metadata option
 356          *    'language': The language for extmetadata property
 357          *    'multilang': Return all translations in extmetadata property
 358          *    'revdelUser': User to use when checking whether to show revision-deleted fields.
 359          * @return array Result array
 360          */
 361         static function getInfo( $file, $prop, $result, $thumbParams = null, $opts = false ) {
 362                 global $wgContLang;
 363
 364                 $anyHidden = false;
 365
 366                 if ( !$opts || is_string( $opts ) ) {
 367                         $opts = array(
 368                                 'version' => $opts ?: 'latest',
 369                                 'language' => $wgContLang,
 370                                 'multilang' => false,
 371                                 'extmetadatafilter' => array(),
 372                                 'revdelUser' => null,
 373                         );
 374                 }
 375                 $version = $opts['version'];
 376                 $vals = array(
 377                         ApiResult::META_TYPE => 'assoc',
 378                 );
 379                 // Timestamp is shown even if the file is revdelete'd in interface
 380                 // so do same here.
 381                 if ( isset( $prop['timestamp'] ) ) {
 382                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $file->getTimestamp() );
 383                 }
 384
 385                 // Handle external callers who don't pass revdelUser
 386                 if ( isset( $opts['revdelUser'] ) && $opts['revdelUser'] ) {
 387                         $revdelUser = $opts['revdelUser'];
 388                         $canShowField = function ( $field ) use ( $file, $revdelUser ) {
 389                                 return $file->userCan( $field, $revdelUser );
 390                         };
 391                 } else {
 392                         $canShowField = function ( $field ) use ( $file ) {
 393                                 return !$file->isDeleted( $field );
 394                         };
 395                 }
 396
 397                 $user = isset( $prop['user'] );
 398                 $userid = isset( $prop['userid'] );
 399
 400                 if ( $user || $userid ) {
 401                         if ( $file->isDeleted( File::DELETED_USER ) ) {
 402                                 $vals['userhidden'] = true;
 403                                 $anyHidden = true;
 404                         }
 405                         if ( $canShowField( File::DELETED_USER ) ) {
 406                                 if ( $user ) {
 407                                         $vals['user'] = $file->getUser();
 408                                 }
 409                                 if ( $userid ) {
 410                                         $vals['userid'] = $file->getUser( 'id' );
 411                                 }
 412                                 if ( !$file->getUser( 'id' ) ) {
 413                                         $vals['anon'] = true;
 414                                 }
 415                         }
 416                 }
 417
 418                 // This is shown even if the file is revdelete'd in interface
 419                 // so do same here.
 420                 if ( isset( $prop['size'] ) || isset( $prop['dimensions'] ) ) {
 421                         $vals['size'] = intval( $file->getSize() );
 422                         $vals['width'] = intval( $file->getWidth() );
 423                         $vals['height'] = intval( $file->getHeight() );
 424
 425                         $pageCount = $file->pageCount();
 426                         if ( $pageCount !== false ) {
 427                                 $vals['pagecount'] = $pageCount;
 428                         }
 429
 430                         // length as in how many seconds long a video is.
 431                         $length = $file->getLength();
 432                         if ( $length ) {
 433                                 // Call it duration, because "length" can be ambiguous.
 434                                 $vals['duration'] = (float)$length;
 435                         }
 436                 }
 437
 438                 $pcomment = isset( $prop['parsedcomment'] );
 439                 $comment = isset( $prop['comment'] );
 440
 441                 if ( $pcomment || $comment ) {
 442                         if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
 443                                 $vals['commenthidden'] = true;
 444                                 $anyHidden = true;
 445                         }
 446                         if ( $canShowField( File::DELETED_COMMENT ) ) {
 447                                 if ( $pcomment ) {
 448                                         $vals['parsedcomment'] = Linker::formatComment(
 449                                                 $file->getDescription( File::RAW ), $file->getTitle() );
 450                                 }
 451                                 if ( $comment ) {
 452                                         $vals['comment'] = $file->getDescription( File::RAW );
 453                                 }
 454                         }
 455                 }
 456
 457                 $canonicaltitle = isset( $prop['canonicaltitle'] );
 458                 $url = isset( $prop['url'] );
 459                 $sha1 = isset( $prop['sha1'] );
 460                 $meta = isset( $prop['metadata'] );
 461                 $extmetadata = isset( $prop['extmetadata'] );
 462                 $commonmeta = isset( $prop['commonmetadata'] );
 463                 $mime = isset( $prop['mime'] );
 464                 $mediatype = isset( $prop['mediatype'] );
 465                 $archive = isset( $prop['archivename'] );
 466                 $bitdepth = isset( $prop['bitdepth'] );
 467                 $uploadwarning = isset( $prop['uploadwarning'] );
 468
 469                 if ( $uploadwarning ) {
 470                         $vals['html'] = SpecialUpload::getExistsWarning( UploadBase::getExistsWarning( $file ) );
 471                 }
 472
 473                 if ( $file->isDeleted( File::DELETED_FILE ) ) {
 474                         $vals['filehidden'] = true;
 475                         $anyHidden = true;
 476                 }
 477
 478                 if ( $anyHidden && $file->isDeleted( File::DELETED_RESTRICTED ) ) {
 479                         $vals['suppressed'] = true;
 480                 }
 481
 482                 if ( !$canShowField( File::DELETED_FILE ) ) {
 483                         //Early return, tidier than indenting all following things one level
 484                         return $vals;
 485                 }
 486
 487                 if ( $canonicaltitle ) {
 488                         $vals['canonicaltitle'] = $file->getTitle()->getPrefixedText();
 489                 }
 490
 491                 if ( $url ) {
 492                         if ( !is_null( $thumbParams ) ) {
 493                                 $mto = $file->transform( $thumbParams );
 494                                 self::$transformCount++;
 495                                 if ( $mto && !$mto->isError() ) {
 496                                         $vals['thumburl'] = wfExpandUrl( $mto->getUrl(), PROTO_CURRENT );
 497
 498                                         // bug 23834 - If the URL's are the same, we haven't resized it, so shouldn't give the wanted
 499                                         // thumbnail sizes for the thumbnail actual size
 500                                         if ( $mto->getUrl() !== $file->getUrl() ) {
 501                                                 $vals['thumbwidth'] = intval( $mto->getWidth() );
 502                                                 $vals['thumbheight'] = intval( $mto->getHeight() );
 503                                         } else {
 504                                                 $vals['thumbwidth'] = intval( $file->getWidth() );
 505                                                 $vals['thumbheight'] = intval( $file->getHeight() );
 506                                         }
 507
 508                                         if ( isset( $prop['thumbmime'] ) && $file->getHandler() ) {
 509                                                 list( , $mime ) = $file->getHandler()->getThumbType(
 510                                                         $mto->getExtension(), $file->getMimeType(), $thumbParams );
 511                                                 $vals['thumbmime'] = $mime;
 512                                         }
 513                                 } elseif ( $mto && $mto->isError() ) {
 514                                         $vals['thumberror'] = $mto->toText();
 515                                 }
 516                         }
 517                         $vals['url'] = wfExpandUrl( $file->getFullURL(), PROTO_CURRENT );
 518                         $vals['descriptionurl'] = wfExpandUrl( $file->getDescriptionUrl(), PROTO_CURRENT );
 519                 }
 520
 521                 if ( $sha1 ) {
 522                         $vals['sha1'] = wfBaseConvert( $file->getSha1(), 36, 16, 40 );
 523                 }
 524
 525                 if ( $meta ) {
 526                         MediaWiki\suppressWarnings();
 527                         $metadata = unserialize( $file->getMetadata() );
 528                         MediaWiki\restoreWarnings();
 529                         if ( $metadata && $version !== 'latest' ) {
 530                                 $metadata = $file->convertMetadataVersion( $metadata, $version );
 531                         }
 532                         $vals['metadata'] = $metadata ? self::processMetaData( $metadata, $result ) : null;
 533                 }
 534                 if ( $commonmeta ) {
 535                         $metaArray = $file->getCommonMetaArray();
 536                         $vals['commonmetadata'] = $metaArray ? self::processMetaData( $metaArray, $result ) : array();
 537                 }
 538
 539                 if ( $extmetadata ) {
 540                         // Note, this should return an array where all the keys
 541                         // start with a letter, and all the values are strings.
 542                         // Thus there should be no issue with format=xml.
 543                         $format = new FormatMetadata;
 544                         $format->setSingleLanguage( !$opts['multilang'] );
 545                         $format->getContext()->setLanguage( $opts['language'] );
 546                         $extmetaArray = $format->fetchExtendedMetadata( $file );
 547                         if ( $opts['extmetadatafilter'] ) {
 548                                 $extmetaArray = array_intersect_key(
 549                                         $extmetaArray, array_flip( $opts['extmetadatafilter'] )
 550                                 );
 551                         }
 552                         $vals['extmetadata'] = $extmetaArray;
 553                 }
 554
 555                 if ( $mime ) {
 556                         $vals['mime'] = $file->getMimeType();
 557                 }
 558
 559                 if ( $mediatype ) {
 560                         $vals['mediatype'] = $file->getMediaType();
 561                 }
 562
 563                 if ( $archive && $file->isOld() ) {
 564                         $vals['archivename'] = $file->getArchiveName();
 565                 }
 566
 567                 if ( $bitdepth ) {
 568                         $vals['bitdepth'] = $file->getBitDepth();
 569                 }
 570
 571                 return $vals;
 572         }
 573
 574         /**
 575          * Get the count of image transformations performed
 576          *
 577          * If this is >= TRANSFORM_LIMIT, you should probably stop processing images.
 578          *
 579          * @return int Count
 580          */
 581         static function getTransformCount() {
 582                 return self::$transformCount;
 583         }
 584
 585         /**
 586          *
 587          * @param array $metadata
 588          * @param ApiResult $result
 589          * @return array
 590          */
 591         public static function processMetaData( $metadata, $result ) {
 592                 $retval = array();
 593                 if ( is_array( $metadata ) ) {
 594                         foreach ( $metadata as $key => $value ) {
 595                                 $r = array(
 596                                         'name' => $key,
 597                                         ApiResult::META_BC_BOOLS => array( 'value' ),
 598                                 );
 599                                 if ( is_array( $value ) ) {
 600                                         $r['value'] = self::processMetaData( $value, $result );
 601                                 } else {
 602                                         $r['value'] = $value;
 603                                 }
 604                                 $retval[] = $r;
 605                         }
 606                 }
 607                 ApiResult::setIndexedTagName( $retval, 'metadata' );
 608
 609                 return $retval;
 610         }
 611
 612         public function getCacheMode( $params ) {
 613                 if ( $this->userCanSeeRevDel() ) {
 614                         return 'private';
 615                 }
 616
 617                 return 'public';
 618         }
 619
 620         /**
 621          * @param File $img
 622          * @param null|string $start
 623          * @return string
 624          */
 625         protected function getContinueStr( $img, $start = null ) {
 626                 if ( $start === null ) {
 627                         $start = $img->getTimestamp();
 628                 }
 629
 630                 return $img->getOriginalTitle()->getDBkey() . '|' . $start;
 631         }
 632
 633         public function getAllowedParams() {
 634                 global $wgContLang;
 635
 636                 return array(
 637                         'prop' => array(
 638                                 ApiBase::PARAM_ISMULTI => true,
 639                                 ApiBase::PARAM_DFLT => 'timestamp|user',
 640                                 ApiBase::PARAM_TYPE => self::getPropertyNames(),
 641                                 ApiBase::PARAM_HELP_MSG_PER_VALUE => self::getPropertyMessages(),
 642                         ),
 643                         'limit' => array(
 644                                 ApiBase::PARAM_TYPE => 'limit',
 645                                 ApiBase::PARAM_DFLT => 1,
 646                                 ApiBase::PARAM_MIN => 1,
 647                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 648                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 649                         ),
 650                         'start' => array(
 651                                 ApiBase::PARAM_TYPE => 'timestamp'
 652                         ),
 653                         'end' => array(
 654                                 ApiBase::PARAM_TYPE => 'timestamp'
 655                         ),
 656                         'urlwidth' => array(
 657                                 ApiBase::PARAM_TYPE => 'integer',
 658                                 ApiBase::PARAM_DFLT => -1,
 659                                 ApiBase::PARAM_HELP_MSG => array(
 660                                         'apihelp-query+imageinfo-param-urlwidth',
 661                                         ApiQueryImageInfo::TRANSFORM_LIMIT,
 662                                 ),
 663                         ),
 664                         'urlheight' => array(
 665                                 ApiBase::PARAM_TYPE => 'integer',
 666                                 ApiBase::PARAM_DFLT => -1
 667                         ),
 668                         'metadataversion' => array(
 669                                 ApiBase::PARAM_TYPE => 'string',
 670                                 ApiBase::PARAM_DFLT => '1',
 671                         ),
 672                         'extmetadatalanguage' => array(
 673                                 ApiBase::PARAM_TYPE => 'string',
 674                                 ApiBase::PARAM_DFLT => $wgContLang->getCode(),
 675                         ),
 676                         'extmetadatamultilang' => array(
 677                                 ApiBase::PARAM_TYPE => 'boolean',
 678                                 ApiBase::PARAM_DFLT => false,
 679                         ),
 680                         'extmetadatafilter' => array(
 681                                 ApiBase::PARAM_TYPE => 'string',
 682                                 ApiBase::PARAM_ISMULTI => true,
 683                         ),
 684                         'urlparam' => array(
 685                                 ApiBase::PARAM_DFLT => '',
 686                                 ApiBase::PARAM_TYPE => 'string',
 687                         ),
 688                         'continue' => array(
 689                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 690                         ),
 691                         'localonly' => false,
 692                 );
 693         }
 694
 695         /**
 696          * Returns all possible parameters to iiprop
 697          *
 698          * @param array $filter List of properties to filter out
 699          * @return array
 700          */
 701         public static function getPropertyNames( $filter = array() ) {
 702                 return array_keys( self::getPropertyMessages( $filter ) );
 703         }
 704
 705         /**
 706          * Returns messages for all possible parameters to iiprop
 707          *
 708          * @param array $filter List of properties to filter out
 709          * @return array
 710          */
 711         public static function getPropertyMessages( $filter = array() ) {
 712                 return array_diff_key(
 713                         array(
 714                                 'timestamp' => 'apihelp-query+imageinfo-paramvalue-prop-timestamp',
 715                                 'user' => 'apihelp-query+imageinfo-paramvalue-prop-user',
 716                                 'userid' => 'apihelp-query+imageinfo-paramvalue-prop-userid',
 717                                 'comment' => 'apihelp-query+imageinfo-paramvalue-prop-comment',
 718                                 'parsedcomment' => 'apihelp-query+imageinfo-paramvalue-prop-parsedcomment',
 719                                 'canonicaltitle' => 'apihelp-query+imageinfo-paramvalue-prop-canonicaltitle',
 720                                 'url' => 'apihelp-query+imageinfo-paramvalue-prop-url',
 721                                 'size' => 'apihelp-query+imageinfo-paramvalue-prop-size',
 722                                 'dimensions' => 'apihelp-query+imageinfo-paramvalue-prop-dimensions',
 723                                 'sha1' => 'apihelp-query+imageinfo-paramvalue-prop-sha1',
 724                                 'mime' => 'apihelp-query+imageinfo-paramvalue-prop-mime',
 725                                 'thumbmime' => 'apihelp-query+imageinfo-paramvalue-prop-thumbmime',
 726                                 'mediatype' => 'apihelp-query+imageinfo-paramvalue-prop-mediatype',
 727                                 'metadata' => 'apihelp-query+imageinfo-paramvalue-prop-metadata',
 728                                 'commonmetadata' => 'apihelp-query+imageinfo-paramvalue-prop-commonmetadata',
 729                                 'extmetadata' => 'apihelp-query+imageinfo-paramvalue-prop-extmetadata',
 730                                 'archivename' => 'apihelp-query+imageinfo-paramvalue-prop-archivename',
 731                                 'bitdepth' => 'apihelp-query+imageinfo-paramvalue-prop-bitdepth',
 732                                 'uploadwarning' => 'apihelp-query+imageinfo-paramvalue-prop-uploadwarning',
 733                         ),
 734                         array_flip( $filter )
 735                 );
 736         }
 737
 738         /**
 739          * Returns array key value pairs of properties and their descriptions
 740          *
 741          * @deprecated since 1.25
 742          * @param string $modulePrefix
 743          * @return array
 744          */
 745         private static function getProperties( $modulePrefix = '' ) {
 746                 return array(
 747                         'timestamp' =>      ' timestamp     - Adds timestamp for the uploaded version',
 748                         'user' =>           ' user          - Adds the user who uploaded the image version',
 749                         'userid' =>         ' userid        - Add the user ID that uploaded the image version',
 750                         'comment' =>        ' comment       - Comment on the version',
 751                         'parsedcomment' =>  ' parsedcomment - Parse the comment on the version',
 752                         'canonicaltitle' => ' canonicaltitle - Adds the canonical title of the image file',
 753                         'url' =>            ' url           - Gives URL to the image and the description page',
 754                         'size' =>           ' size          - Adds the size of the image in bytes, ' .
 755                                 'its height and its width. Page count and duration are added if applicable',
 756                         'dimensions' =>     ' dimensions    - Alias for size', // B/C with Allimages
 757                         'sha1' =>           ' sha1          - Adds SHA-1 hash for the image',
 758                         'mime' =>           ' mime          - Adds MIME type of the image',
 759                         'thumbmime' =>      ' thumbmime     - Adds MIME type of the image thumbnail' .
 760                                 ' (requires url and param ' . $modulePrefix . 'urlwidth)',
 761                         'mediatype' =>      ' mediatype     - Adds the media type of the image',
 762                         'metadata' =>       ' metadata      - Lists Exif metadata for the version of the image',
 763                         'commonmetadata' => ' commonmetadata - Lists file format generic metadata ' .
 764                                 'for the version of the image',
 765                         'extmetadata' =>    ' extmetadata   - Lists formatted metadata combined ' .
 766                                 'from multiple sources. Results are HTML formatted.',
 767                         'archivename' =>    ' archivename   - Adds the file name of the archive ' .
 768                                 'version for non-latest versions',
 769                         'bitdepth' =>       ' bitdepth      - Adds the bit depth of the version',
 770                         'uploadwarning' =>  ' uploadwarning - Used by the Special:Upload page to ' .
 771                                 'get information about an existing file. Not intended for use outside MediaWiki core',
 772                 );
 773         }
 774
 775         /**
 776          * Returns the descriptions for the properties provided by getPropertyNames()
 777          *
 778          * @deprecated since 1.25
 779          * @param array $filter List of properties to filter out
 780          * @param string $modulePrefix
 781          * @return array
 782          */
 783         public static function getPropertyDescriptions( $filter = array(), $modulePrefix = '' ) {
 784                 return array_merge(
 785                         array( 'What image information to get:' ),
 786                         array_values( array_diff_key( self::getProperties( $modulePrefix ), array_flip( $filter ) ) )
 787                 );
 788         }
 789
 790         protected function getExamplesMessages() {
 791                 return array(
 792                         'action=query&titles=File:Albert%20Einstein%20Head.jpg&prop=imageinfo'
 793                                 => 'apihelp-query+imageinfo-example-simple',
 794                         'action=query&titles=File:Test.jpg&prop=imageinfo&iilimit=50&' .
 795                                 'iiend=2007-12-31T23:59:59Z&iiprop=timestamp|user|url'
 796                                 => 'apihelp-query+imageinfo-example-dated',
 797                 );
 798         }
 799
 800         public function getHelpUrls() {
 801                 return 'https://www.mediawiki.org/wiki/API:Imageinfo';
 802         }
 803 }