includes/api/ApiQueryImageInfo.php

   1 <?php
   2
   3 /**
   4  * Created on July 6, 2007
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright © 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  */
  25
  26 if ( !defined( 'MEDIAWIKI' ) ) {
  27         // Eclipse helper - will be ignored in production
  28         require_once( 'ApiQueryBase.php' );
  29 }
  30
  31 /**
  32  * A query action to get image information and upload history.
  33  *
  34  * @ingroup API
  35  */
  36 class ApiQueryImageInfo extends ApiQueryBase {
  37
  38         public function __construct( $query, $moduleName ) {
  39                 parent::__construct( $query, $moduleName, 'ii' );
  40         }
  41
  42         public function execute() {
  43                 $params = $this->extractRequestParams();
  44
  45                 $prop = array_flip( $params['prop'] );
  46
  47                 if ( $params['urlheight'] != - 1 && $params['urlwidth'] == - 1 ) {
  48                         $this->dieUsage( 'iiurlheight cannot be used without iiurlwidth', 'iiurlwidth' );
  49                 }
  50
  51                 if ( $params['urlwidth'] != - 1 ) {
  52                         $scale = array();
  53                         $scale['width'] = $params['urlwidth'];
  54                         $scale['height'] = $params['urlheight'];
  55                 } else {
  56                         $scale = null;
  57                 }
  58
  59                 $pageIds = $this->getPageSet()->getAllTitlesByNamespace();
  60                 if ( !empty( $pageIds[NS_FILE] ) ) {
  61                         $titles = array_keys( $pageIds[NS_FILE] );
  62                         asort( $titles ); // Ensure the order is always the same
  63
  64                         $skip = false;
  65                         if ( !is_null( $params['continue'] ) ) {
  66                                 $skip = true;
  67                                 $cont = explode( '|', $params['continue'] );
  68                                 if ( count( $cont ) != 2 ) {
  69                                         $this->dieUsage( 'Invalid continue param. You should pass the original ' .
  70                                                         'value returned by the previous query', '_badcontinue' );
  71                                 }
  72                                 $fromTitle = strval( $cont[0] );
  73                                 $fromTimestamp = $cont[1];
  74                                 // Filter out any titles before $fromTitle
  75                                 foreach ( $titles as $key => $title ) {
  76                                         if ( $title < $fromTitle ) {
  77                                                 unset( $titles[$key] );
  78                                         } else {
  79                                                 break;
  80                                         }
  81                                 }
  82                         }
  83
  84                         $result = $this->getResult();
  85                         $images = RepoGroup::singleton()->findFiles( $titles );
  86                         foreach ( $images as $img ) {
  87                                 // Skip redirects
  88                                 if ( $img->getOriginalTitle()->isRedirect() ) {
  89                                         continue;
  90                                 }
  91
  92                                 $start = $skip ? $fromTimestamp : $params['start'];
  93                                 $pageId = $pageIds[NS_IMAGE][ $img->getOriginalTitle()->getDBkey() ];
  94
  95                                 $fit = $result->addValue(
  96                                         array( 'query', 'pages', intval( $pageId ) ),
  97                                         'imagerepository', $img->getRepoName()
  98                                 );
  99                                 if ( !$fit ) {
 100                                         if ( count( $pageIds[NS_IMAGE] ) == 1 ) {
 101                                                 // The user is screwed. imageinfo can't be solely
 102                                                 // responsible for exceeding the limit in this case,
 103                                                 // so set a query-continue that just returns the same
 104                                                 // thing again. When the violating queries have been
 105                                                 // out-continued, the result will get through
 106                                                 $this->setContinueEnumParameter( 'start',
 107                                                         wfTimestamp( TS_ISO_8601, $img->getTimestamp() ) );
 108                                         } else {
 109                                                 $this->setContinueEnumParameter( 'continue',
 110                                                         $this->getContinueStr( $img ) );
 111                                         }
 112                                         break;
 113                                 }
 114
 115                                 // Get information about the current version first
 116                                 // Check that the current version is within the start-end boundaries
 117                                 $gotOne = false;
 118                                 if (
 119                                         ( is_null( $start ) || $img->getTimestamp() <= $start ) &&
 120                                         ( is_null( $params['end'] ) || $img->getTimestamp() >= $params['end'] )
 121                                 )
 122                                 {
 123                                         $gotOne = true;
 124                                         $fit = $this->addPageSubItem( $pageId,
 125                                                 self::getInfo( $img, $prop, $result, $scale ) );
 126                                         if ( !$fit ) {
 127                                                 if ( count( $pageIds[NS_IMAGE] ) == 1 ) {
 128                                                         // See the 'the user is screwed' comment above
 129                                                         $this->setContinueEnumParameter( 'start',
 130                                                                 wfTimestamp( TS_ISO_8601, $img->getTimestamp() ) );
 131                                                 } else {
 132                                                         $this->setContinueEnumParameter( 'continue',
 133                                                                 $this->getContinueStr( $img ) );
 134                                                 }
 135                                                 break;
 136                                         }
 137                                 }
 138
 139                                 // Now get the old revisions
 140                                 // Get one more to facilitate query-continue functionality
 141                                 $count = ( $gotOne ? 1 : 0 );
 142                                 $oldies = $img->getHistory( $params['limit'] - $count + 1, $start, $params['end'] );
 143                                 foreach ( $oldies as $oldie ) {
 144                                         if ( ++$count > $params['limit'] ) {
 145                                                 // We've reached the extra one which shows that there are additional pages to be had. Stop here...
 146                                                 // Only set a query-continue if there was only one title
 147                                                 if ( count( $pageIds[NS_FILE] ) == 1 ) {
 148                                                         $this->setContinueEnumParameter( 'start',
 149                                                                 wfTimestamp( TS_ISO_8601, $oldie->getTimestamp() ) );
 150                                                 }
 151                                                 break;
 152                                         }
 153                                         $fit = $this->addPageSubItem( $pageId,
 154                                                 self::getInfo( $oldie, $prop, $result ) );
 155                                         if ( !$fit ) {
 156                                                 if ( count( $pageIds[NS_IMAGE] ) == 1 ) {
 157                                                         $this->setContinueEnumParameter( 'start',
 158                                                                 wfTimestamp( TS_ISO_8601, $oldie->getTimestamp() ) );
 159                                                 } else {
 160                                                         $this->setContinueEnumParameter( 'continue',
 161                                                                 $this->getContinueStr( $oldie ) );
 162                                                 }
 163                                                 break;
 164                                         }
 165                                 }
 166                                 if ( !$fit ) {
 167                                         break;
 168                                 }
 169                                 $skip = false;
 170                         }
 171
 172                         $data = $this->getResultData();
 173                         foreach ( $data['query']['pages'] as $pageid => $arr ) {
 174                                 if ( !isset( $arr['imagerepository'] ) ) {
 175                                         $result->addValue(
 176                                                 array( 'query', 'pages', $pageid ),
 177                                                 'imagerepository', ''
 178                                         );
 179                                 }
 180                                 // The above can't fail because it doesn't increase the result size
 181                         }
 182                 }
 183         }
 184
 185         /**
 186          * Get result information for an image revision
 187          * @param File f The image
 188          * @return array Result array
 189          */
 190         static function getInfo( $file, $prop, $result, $scale = null ) {
 191                 $vals = array();
 192                 if ( isset( $prop['timestamp'] ) ) {
 193                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $file->getTimestamp() );
 194                 }
 195                 if ( isset( $prop['user'] ) ) {
 196                         $vals['user'] = $file->getUser();
 197                         if ( !$file->getUser( 'id' ) ) {
 198                                 $vals['anon'] = '';
 199                         }
 200                 }
 201                 if ( isset( $prop['size'] ) || isset( $prop['dimensions'] ) ) {
 202                         $vals['size'] = intval( $file->getSize() );
 203                         $vals['width'] = intval( $file->getWidth() );
 204                         $vals['height'] = intval( $file->getHeight() );
 205                 }
 206                 if ( isset( $prop['url'] ) ) {
 207                         if ( !is_null( $scale ) && !$file->isOld() ) {
 208                                 $mto = $file->transform( array( 'width' => $scale['width'], 'height' => $scale['height'] ) );
 209                                 if ( $mto && !$mto->isError() ) {
 210                                         $vals['thumburl'] = wfExpandUrl( $mto->getUrl() );
 211                                         $vals['thumbwidth'] = intval( $mto->getWidth() );
 212                                         $vals['thumbheight'] = intval( $mto->getHeight() );
 213                                 }
 214                         }
 215                         $vals['url'] = $file->getFullURL();
 216                         $vals['descriptionurl'] = wfExpandUrl( $file->getDescriptionUrl() );
 217                 }
 218                 if ( isset( $prop['comment'] ) ) {
 219                         $vals['comment'] = $file->getDescription();
 220                 }
 221                 if ( isset( $prop['sha1'] ) ) {
 222                         $vals['sha1'] = wfBaseConvert( $file->getSha1(), 36, 16, 40 );
 223                 }
 224                 if ( isset( $prop['metadata'] ) ) {
 225                         $metadata = $file->getMetadata();
 226                         $vals['metadata'] = $metadata ? self::processMetaData( unserialize( $metadata ), $result ) : null;
 227                 }
 228                 if ( isset( $prop['mime'] ) ) {
 229                         $vals['mime'] = $file->getMimeType();
 230                 }
 231
 232                 if ( isset( $prop['archivename'] ) && $file->isOld() ) {
 233                         $vals['archivename'] = $file->getArchiveName();
 234                 }
 235
 236                 if ( isset( $prop['bitdepth'] ) ) {
 237                         $vals['bitdepth'] = $file->getBitDepth();
 238                 }
 239
 240                 return $vals;
 241         }
 242
 243         public static function processMetaData( $metadata, $result ) {
 244                 $retval = array();
 245                 if ( is_array( $metadata ) ) {
 246                         foreach ( $metadata as $key => $value ) {
 247                                 $r = array( 'name' => $key );
 248                                 if ( is_array( $value ) ) {
 249                                         $r['value'] = self::processMetaData( $value, $result );
 250                                 } else {
 251                                         $r['value'] = $value;
 252                                 }
 253                                 $retval[] = $r;
 254                         }
 255                 }
 256                 $result->setIndexedTagName( $retval, 'metadata' );
 257                 return $retval;
 258         }
 259
 260         private function getContinueStr( $img ) {
 261                 return $img->getOriginalTitle()->getText() .
 262                         '|' .  $img->getTimestamp();
 263         }
 264
 265         public function getAllowedParams() {
 266                 return array(
 267                         'prop' => array(
 268                                 ApiBase::PARAM_ISMULTI => true,
 269                                 ApiBase::PARAM_DFLT => 'timestamp|user',
 270                                 ApiBase::PARAM_TYPE => self::getPropertyNames()
 271                         ),
 272                         'limit' => array(
 273                                 ApiBase::PARAM_TYPE => 'limit',
 274                                 ApiBase::PARAM_DFLT => 1,
 275                                 ApiBase::PARAM_MIN => 1,
 276                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 277                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 278                         ),
 279                         'start' => array(
 280                                 ApiBase::PARAM_TYPE => 'timestamp'
 281                         ),
 282                         'end' => array(
 283                                 ApiBase::PARAM_TYPE => 'timestamp'
 284                         ),
 285                         'urlwidth' => array(
 286                                 ApiBase::PARAM_TYPE => 'integer',
 287                                 ApiBase::PARAM_DFLT => -1
 288                         ),
 289                         'urlheight' => array(
 290                                 ApiBase::PARAM_TYPE => 'integer',
 291                                 ApiBase::PARAM_DFLT => -1
 292                         ),
 293                         'continue' => null,
 294                 );
 295         }
 296
 297         /**
 298          * Returns all possible parameters to iiprop
 299          */
 300         public static function getPropertyNames() {
 301                 return array(
 302                         'timestamp',
 303                         'user',
 304                         'comment',
 305                         'url',
 306                         'size',
 307                         'dimensions', // For backwards compatibility with Allimages
 308                         'sha1',
 309                         'mime',
 310                         'metadata',
 311                         'archivename',
 312                         'bitdepth',
 313                 );
 314         }
 315
 316         public function getParamDescription() {
 317                 return array(
 318                         'prop' => 'What image information to get.',
 319                         'limit' => 'How many image revisions to return',
 320                         'start' => 'Timestamp to start listing from',
 321                         'end' => 'Timestamp to stop listing at',
 322                         'urlwidth' => array( 'If iiprop=url is set, a URL to an image scaled to this width will be returned.',
 323                                             'Only the current version of the image can be scaled.' ),
 324                         'urlheight' => 'Similar to iiurlwidth. Cannot be used without iiurlwidth',
 325                         'continue' => 'When more results are available, use this to continue',
 326                 );
 327         }
 328
 329         public function getDescription() {
 330                 return array(
 331                         'Returns image information and upload history'
 332                 );
 333         }
 334
 335         public function getPossibleErrors() {
 336                 return array_merge( parent::getPossibleErrors(), array(
 337                         array( 'code' => 'iiurlwidth', 'info' => 'iiurlheight cannot be used without iiurlwidth' ),
 338                 ) );
 339         }
 340
 341         protected function getExamples() {
 342                 return array(
 343                         'api.php?action=query&titles=File:Albert%20Einstein%20Head.jpg&prop=imageinfo',
 344                         'api.php?action=query&titles=File:Test.jpg&prop=imageinfo&iilimit=50&iiend=20071231235959&iiprop=timestamp|user|url',
 345                 );
 346         }
 347
 348         public function getVersion() {
 349                 return __CLASS__ . ': $Id$';
 350         }
 351 }