includes/api/ApiQueryImageInfo.php

   1 <?php
   2
   3 /*
   4  * Created on July 6, 2007
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright (C) 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                 if ( $params['urlwidth'] != - 1 ) {
  51                         $scale = array();
  52                         $scale['width'] = $params['urlwidth'];
  53                         $scale['height'] = $params['urlheight'];
  54                 } else {
  55                         $scale = null;
  56                 }
  57
  58                 $pageIds = $this->getPageSet()->getAllTitlesByNamespace();
  59                 if ( !empty( $pageIds[NS_FILE] ) ) {
  60                         $titles = array_keys( $pageIds[NS_FILE] );
  61                         asort( $titles ); // Ensure the order is always the same
  62
  63                         $skip = false;
  64                         if ( !is_null( $params['continue'] ) )
  65                         {
  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                                 $fromTitle = strval( $cont[0] );
  72                                 $fromTimestamp = $cont[1];
  73                                 // Filter out any titles before $fromTitle
  74                                 foreach ( $titles as $key => $title )
  75                                         if ( $title < $fromTitle )
  76                                                 unset( $titles[$key] );
  77                                         else
  78                                                 break;
  79                         }
  80
  81                         $result = $this->getResult();
  82                         $images = RepoGroup::singleton()->findFiles( $titles );
  83                         foreach ( $images as $img ) {
  84                                 // Skip redirects
  85                                 if ( $img->getOriginalTitle()->isRedirect() )
  86                                         continue;
  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                                 {
  97                                         if ( count( $pageIds[NS_IMAGE] ) == 1 )
  98                                                 // The user is screwed. imageinfo can't be solely
  99                                                 // responsible for exceeding the limit in this case,
 100                                                 // so set a query-continue that just returns the same
 101                                                 // thing again. When the violating queries have been
 102                                                 // out-continued, the result will get through
 103                                                 $this->setContinueEnumParameter( 'start',
 104                                                         wfTimestamp( TS_ISO_8601, $img->getTimestamp() ) );
 105                                         else
 106                                                 $this->setContinueEnumParameter( 'continue',
 107                                                         $this->getContinueStr( $img ) );
 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 ( ( is_null( $start ) || $img->getTimestamp() <= $start ) &&
 115                                                 ( is_null( $params['end'] ) || $img->getTimestamp() >= $params['end'] ) ) {
 116                                         $gotOne = true;
 117                                         $fit = $this->addPageSubItem( $pageId,
 118                                                 self::getInfo( $img, $prop, $result, $scale ) );
 119                                         if ( !$fit )
 120                                         {
 121                                                 if ( count( $pageIds[NS_IMAGE] ) == 1 )
 122                                                         // See the 'the user is screwed' comment above
 123                                                         $this->setContinueEnumParameter( 'start',
 124                                                                 wfTimestamp( TS_ISO_8601, $img->getTimestamp() ) );
 125                                                 else
 126                                                         $this->setContinueEnumParameter( 'continue',
 127                                                                 $this->getContinueStr( $img ) );
 128                                                 break;
 129                                         }
 130                                 }
 131
 132                                 // Now get the old revisions
 133                                 // Get one more to facilitate query-continue functionality
 134                                 $count = ( $gotOne ? 1 : 0 );
 135                                 $oldies = $img->getHistory( $params['limit'] - $count + 1, $start, $params['end'] );
 136                                 foreach ( $oldies as $oldie ) {
 137                                         if ( ++$count > $params['limit'] ) {
 138                                                 // We've reached the extra one which shows that there are additional pages to be had. Stop here...
 139                                                 // Only set a query-continue if there was only one title
 140                                                 if ( count( $pageIds[NS_FILE] ) == 1 )
 141                                                 {
 142                                                         $this->setContinueEnumParameter( 'start',
 143                                                                 wfTimestamp( TS_ISO_8601, $oldie->getTimestamp() ) );
 144                                                 }
 145                                                 break;
 146                                         }
 147                                         $fit = $this->addPageSubItem( $pageId,
 148                                                 self::getInfo( $oldie, $prop, $result ) );
 149                                         if ( !$fit )
 150                                         {
 151                                                 if ( count( $pageIds[NS_IMAGE] ) == 1 )
 152                                                         $this->setContinueEnumParameter( 'start',
 153                                                                 wfTimestamp( TS_ISO_8601, $oldie->getTimestamp() ) );
 154                                                 else
 155                                                         $this->setContinueEnumParameter( 'continue',
 156                                                                 $this->getContinueStr( $oldie ) );
 157                                                 break;
 158                                         }
 159                                 }
 160                                 if ( !$fit )
 161                                         break;
 162                                 $skip = false;
 163                         }
 164
 165                         $data = $this->getResultData();
 166                         foreach ( $data['query']['pages'] as $pageid => $arr ) {
 167                                 if ( !isset( $arr['imagerepository'] ) )
 168                                         $result->addValue(
 169                                                 array( 'query', 'pages', $pageid ),
 170                                                 'imagerepository', ''
 171                                         );
 172                                         // The above can't fail because it doesn't increase the result size
 173                         }
 174                 }
 175         }
 176
 177         /**
 178          * Get result information for an image revision
 179          * @param File f The image
 180          * @return array Result array
 181          */
 182         static function getInfo( $file, $prop, $result, $scale = null ) {
 183                 $vals = array();
 184                 if ( isset( $prop['timestamp'] ) )
 185                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $file->getTimestamp() );
 186                 if ( isset( $prop['user'] ) ) {
 187                         $vals['user'] = $file->getUser();
 188                         if ( !$file->getUser( 'id' ) )
 189                                 $vals['anon'] = '';
 190                 }
 191                 if ( isset( $prop['size'] ) || isset( $prop['dimensions'] ) ) {
 192                         $vals['size'] = intval( $file->getSize() );
 193                         $vals['width'] = intval( $file->getWidth() );
 194                         $vals['height'] = intval( $file->getHeight() );
 195                 }
 196                 if ( isset( $prop['url'] ) ) {
 197                         if ( !is_null( $scale ) && !$file->isOld() ) {
 198                                 $mto = $file->transform( array( 'width' => $scale['width'], 'height' => $scale['height'] ) );
 199                                 if ( $mto && !$mto->isError() )
 200                                 {
 201                                         $vals['thumburl'] = wfExpandUrl( $mto->getUrl() );
 202                                         $vals['thumbwidth'] = intval( $mto->getWidth() );
 203                                         $vals['thumbheight'] = intval( $mto->getHeight() );
 204                                 }
 205                         }
 206                         $vals['url'] = $file->getFullURL();
 207                         $vals['descriptionurl'] = wfExpandUrl( $file->getDescriptionUrl() );
 208                 }
 209                 if ( isset( $prop['comment'] ) )
 210                         $vals['comment'] = $file->getDescription();
 211                 if ( isset( $prop['sha1'] ) )
 212                         $vals['sha1'] = wfBaseConvert( $file->getSha1(), 36, 16, 40 );
 213                 if ( isset( $prop['metadata'] ) ) {
 214                         $metadata = $file->getMetadata();
 215                         $vals['metadata'] = $metadata ? self::processMetaData( unserialize( $metadata ), $result ) : null;
 216                 }
 217                 if ( isset( $prop['mime'] ) )
 218                         $vals['mime'] = $file->getMimeType();
 219
 220                 if ( isset( $prop['archivename'] ) && $file->isOld() )
 221                         $vals['archivename'] = $file->getArchiveName();
 222
 223                 if ( isset( $prop['bitdepth'] ) )
 224                         $vals['bitdepth'] = $file->getBitDepth();
 225
 226                 return $vals;
 227         }
 228
 229         public static function processMetaData( $metadata, $result )
 230         {
 231                 $retval = array();
 232                 if ( is_array( $metadata ) ) {
 233                         foreach ( $metadata as $key => $value )
 234                         {
 235                                 $r = array( 'name' => $key );
 236                                 if ( is_array( $value ) )
 237                                         $r['value'] = self::processMetaData( $value, $result );
 238                                 else
 239                                         $r['value'] = $value;
 240                                 $retval[] = $r;
 241                         }
 242                 }
 243                 $result->setIndexedTagName( $retval, 'metadata' );
 244                 return $retval;
 245         }
 246
 247         public function getCacheMode( $params ) {
 248                 return 'public';
 249         }
 250
 251         private function getContinueStr( $img )
 252         {
 253                 return $img->getOriginalTitle()->getText() .
 254                         '|' .  $img->getTimestamp();
 255         }
 256
 257         public function getAllowedParams() {
 258                 return array (
 259                         'prop' => array (
 260                                 ApiBase :: PARAM_ISMULTI => true,
 261                                 ApiBase :: PARAM_DFLT => 'timestamp|user',
 262                                 ApiBase :: PARAM_TYPE => self::getPropertyNames()
 263                         ),
 264                         'limit' => array(
 265                                 ApiBase :: PARAM_TYPE => 'limit',
 266                                 ApiBase :: PARAM_DFLT => 1,
 267                                 ApiBase :: PARAM_MIN => 1,
 268                                 ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
 269                                 ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
 270                         ),
 271                         'start' => array(
 272                                 ApiBase :: PARAM_TYPE => 'timestamp'
 273                         ),
 274                         'end' => array(
 275                                 ApiBase :: PARAM_TYPE => 'timestamp'
 276                         ),
 277                         'urlwidth' => array(
 278                                 ApiBase :: PARAM_TYPE => 'integer',
 279                                 ApiBase :: PARAM_DFLT => - 1
 280                         ),
 281                         'urlheight' => array(
 282                                 ApiBase :: PARAM_TYPE => 'integer',
 283                                 ApiBase :: PARAM_DFLT => - 1
 284                         ),
 285                         'continue' => null,
 286                 );
 287         }
 288
 289         /**
 290          * Returns all possible parameters to iiprop
 291          */
 292         public static function getPropertyNames() {
 293                 return array (
 294                                         'timestamp',
 295                                         'user',
 296                                         'comment',
 297                                         'url',
 298                                         'size',
 299                                         'dimensions', // For backwards compatibility with Allimages
 300                                         'sha1',
 301                                         'mime',
 302                                         'metadata',
 303                                         'archivename',
 304                                         'bitdepth',
 305                                 );
 306         }
 307
 308         public function getParamDescription() {
 309                 return array (
 310                         'prop' => 'What image information to get.',
 311                         'limit' => 'How many image revisions to return',
 312                         'start' => 'Timestamp to start listing from',
 313                         'end' => 'Timestamp to stop listing at',
 314                         'urlwidth' => array( 'If iiprop=url is set, a URL to an image scaled to this width will be returned.',
 315                                             'Only the current version of the image can be scaled.' ),
 316                         'urlheight' => 'Similar to iiurlwidth. Cannot be used without iiurlwidth',
 317                         'continue' => 'When more results are available, use this to continue',
 318                 );
 319         }
 320
 321         public function getDescription() {
 322                 return array (
 323                         'Returns image information and upload history'
 324                 );
 325         }
 326
 327         public function getPossibleErrors() {
 328                 return array_merge( parent::getPossibleErrors(), array(
 329                         array( 'code' => 'iiurlwidth', 'info' => 'iiurlheight cannot be used without iiurlwidth' ),
 330                 ) );
 331         }
 332
 333         protected function getExamples() {
 334                 return array (
 335                         'api.php?action=query&titles=File:Albert%20Einstein%20Head.jpg&prop=imageinfo',
 336                         'api.php?action=query&titles=File:Test.jpg&prop=imageinfo&iilimit=50&iiend=20071231235959&iiprop=timestamp|user|url',
 337                 );
 338         }
 339
 340         public function getVersion() {
 341                 return __CLASS__ . ': $Id: ApiQueryImageInfo.php 69932 2010-07-26 08:03:21Z tstarling $';
 342         }
 343 }