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                 $titles = array_keys($pageIds[NS_FILE]);
  60                 asort($titles); // Ensure the order is always the same
  61                 if (!empty($titles)) {
  62                         $skip = false;
  63                         if(!is_null($params['continue']))
  64                         {
  65                                 $skip = true;
  66                                 $cont = explode('|', $params['continue']);
  67                                 if(count($cont) != 2)
  68                                         $this->dieUsage("Invalid continue param. You should pass the original " .
  69                                                         "value returned by the previous query", "_badcontinue");
  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                         $result = $this->getResult();
  81                         $images = RepoGroup::singleton()->findFiles( $titles );
  82                         foreach ( $images as $img ) {
  83                                 $start = $skip ? $fromTimestamp : $params['start'];
  84                                 $pageId = $pageIds[NS_IMAGE][ $img->getOriginalTitle()->getDBkey() ];
  85
  86                                 $fit = $result->addValue(
  87                                         array('query', 'pages', intval($pageId)),
  88                                         'imagerepository', $img->getRepoName()
  89                                 );
  90                                 if(!$fit)
  91                                 {
  92                                         if(count($pageIds[NS_IMAGE]) == 1)
  93                                                 # The user is screwed. imageinfo can't be solely
  94                                                 # responsible for exceeding the limit in this case,
  95                                                 # so set a query-continue that just returns the same
  96                                                 # thing again. When the violating queries have been
  97                                                 # out-continued, the result will get through
  98                                                 $this->setContinueEnumParameter('start',
  99                                                         wfTimestamp(TS_ISO_8601, $img->getTimestamp()));
 100                                         else
 101                                                 $this->setContinueEnumParameter('continue',
 102                                                         $this->getContinueStr($img));
 103                                         break;
 104                                 }
 105
 106                                 // Get information about the current version first
 107                                 // Check that the current version is within the start-end boundaries
 108                                 $gotOne = false;
 109                                 if((is_null($start) || $img->getTimestamp() <= $start) &&
 110                                                 (is_null($params['end']) || $img->getTimestamp() >= $params['end'])) {
 111                                         $gotOne = true;
 112                                         $fit = $this->addPageSubItem($pageId,
 113                                                 self::getInfo( $img, $prop, $result, $scale));
 114                                         if(!$fit)
 115                                         {
 116                                                 if(count($pageIds[NS_IMAGE]) == 1)
 117                                                         # See the 'the user is screwed' comment above
 118                                                         $this->setContinueEnumParameter('start',
 119                                                                 wfTimestamp(TS_ISO_8601, $img->getTimestamp()));
 120                                                 else
 121                                                         $this->setContinueEnumParameter('continue',
 122                                                                 $this->getContinueStr($img));
 123                                                 break;
 124                                         }
 125                                 }
 126
 127                                 // Now get the old revisions
 128                                 // Get one more to facilitate query-continue functionality
 129                                 $count = ($gotOne ? 1 : 0);
 130                                 $oldies = $img->getHistory($params['limit'] - $count + 1, $start, $params['end']);
 131                                 foreach($oldies as $oldie) {
 132                                         if(++$count > $params['limit']) {
 133                                                 // We've reached the extra one which shows that there are additional pages to be had. Stop here...
 134                                                 // Only set a query-continue if there was only one title
 135                                                 if(count($pageIds[NS_FILE]) == 1)
 136                                                 {
 137                                                         $this->setContinueEnumParameter('start',
 138                                                                 wfTimestamp(TS_ISO_8601, $oldie->getTimestamp()));
 139                                                 }
 140                                                 break;
 141                                         }
 142                                         $fit = $this->addPageSubItem($pageId,
 143                                                 self::getInfo($oldie, $prop, $result));
 144                                         if(!$fit)
 145                                         {
 146                                                 if(count($pageIds[NS_IMAGE]) == 1)
 147                                                         $this->setContinueEnumParameter('start',
 148                                                                 wfTimestamp(TS_ISO_8601, $oldie->getTimestamp()));
 149                                                 else
 150                                                         $this->setContinueEnumParameter('continue',
 151                                                                 $this->getContinueStr($oldie));
 152                                                 break;
 153                                         }
 154                                 }
 155                                 if(!$fit)
 156                                         break;
 157                                 $skip = false;
 158                         }
 159
 160                         $missing = array_diff( array_keys( $pageIds[NS_FILE] ), array_keys( $images ) );
 161                         foreach ($missing as $title) {
 162                                 $result->addValue(
 163                                         array('query', 'pages', intval($pageIds[NS_FILE][$title])),
 164                                         'imagerepository', ''
 165                                 );
 166                                 // The above can't fail because it doesn't increase the result size
 167                         }
 168                 }
 169         }
 170
 171         /**
 172          * Get result information for an image revision
 173          * @param File f The image
 174          * @return array Result array
 175          */
 176         static function getInfo($file, $prop, $result, $scale = null) {
 177                 $vals = array();
 178                 if( isset( $prop['timestamp'] ) )
 179                         $vals['timestamp'] = wfTimestamp(TS_ISO_8601, $file->getTimestamp());
 180                 if( isset( $prop['user'] ) ) {
 181                         $vals['user'] = $file->getUser();
 182                         if( !$file->getUser( 'id' ) )
 183                                 $vals['anon'] = '';
 184                 }
 185                 if( isset( $prop['size'] ) || isset( $prop['dimensions'] ) ) {
 186                         $vals['size'] = intval( $file->getSize() );
 187                         $vals['width'] = intval( $file->getWidth() );
 188                         $vals['height'] = intval( $file->getHeight() );
 189                 }
 190                 if( isset( $prop['url'] ) ) {
 191                         if( !is_null( $scale ) && !$file->isOld() ) {
 192                                 $mto = $file->transform( array( 'width' => $scale['width'], 'height' => $scale['height'] ) );
 193                                 if( $mto && !$mto->isError() )
 194                                 {
 195                                         $vals['thumburl'] = $mto->getUrl();
 196                                         $vals['thumbwidth'] = $mto->getWidth();
 197                                         $vals['thumbheight'] = $mto->getHeight();
 198                                 }
 199                         }
 200                         $vals['url'] = $file->getFullURL();
 201                         $vals['descriptionurl'] = wfExpandUrl( $file->getDescriptionUrl() );
 202                 }
 203                 if( isset( $prop['comment'] ) )
 204                         $vals['comment'] = $file->getDescription();
 205                 if( isset( $prop['sha1'] ) )
 206                         $vals['sha1'] = wfBaseConvert( $file->getSha1(), 36, 16, 40 );
 207                 if( isset( $prop['metadata'] ) ) {
 208                         $metadata = $file->getMetadata();
 209                         $vals['metadata'] = $metadata ? self::processMetaData( unserialize( $metadata ), $result ) : null;
 210                 }
 211                 if( isset( $prop['mime'] ) )
 212                         $vals['mime'] = $file->getMimeType();
 213
 214                 if( isset( $prop['archivename'] ) && $file->isOld() )
 215                         $vals['archivename'] = $file->getArchiveName();
 216
 217                 if( isset( $prop['bitdepth'] ) )
 218                         $vals['bitdepth'] = $file->getBitDepth();
 219
 220                 return $vals;
 221         }
 222
 223         public static function processMetaData($metadata, $result)
 224         {
 225                 $retval = array();
 226                 foreach($metadata as $key => $value)
 227                 {
 228                         $r = array('name' => $key);
 229                         if(is_array($value))
 230                                 $r['value'] = self::processMetaData($value, $result);
 231                         else
 232                                 $r['value'] = $value;
 233                         $retval[] = $r;
 234                 }
 235                 $result->setIndexedTagName($retval, 'metadata');
 236                 return $retval;
 237         }
 238
 239         private function getContinueStr($img)
 240         {
 241                 return $img->getOriginalTitle()->getText() .
 242                         '|' .  $img->getTimestamp();
 243         }
 244
 245         public function getAllowedParams() {
 246                 return array (
 247                         'prop' => array (
 248                                 ApiBase :: PARAM_ISMULTI => true,
 249                                 ApiBase :: PARAM_DFLT => 'timestamp|user',
 250                                 ApiBase :: PARAM_TYPE => array (
 251                                         'timestamp',
 252                                         'user',
 253                                         'comment',
 254                                         'url',
 255                                         'size',
 256                                         'sha1',
 257                                         'mime',
 258                                         'metadata',
 259                                         'archivename',
 260                                         'bitdepth',
 261                                 )
 262                         ),
 263                         'limit' => array(
 264                                 ApiBase :: PARAM_TYPE => 'limit',
 265                                 ApiBase :: PARAM_DFLT => 1,
 266                                 ApiBase :: PARAM_MIN => 1,
 267                                 ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
 268                                 ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
 269                         ),
 270                         'start' => array(
 271                                 ApiBase :: PARAM_TYPE => 'timestamp'
 272                         ),
 273                         'end' => array(
 274                                 ApiBase :: PARAM_TYPE => 'timestamp'
 275                         ),
 276                         'urlwidth' => array(
 277                                 ApiBase :: PARAM_TYPE => 'integer',
 278                                 ApiBase :: PARAM_DFLT => -1
 279                         ),
 280                         'urlheight' => array(
 281                                 ApiBase :: PARAM_TYPE => 'integer',
 282                                 ApiBase :: PARAM_DFLT => -1
 283                         ),
 284                         'continue' => null,
 285                 );
 286         }
 287
 288         public function getParamDescription() {
 289                 return array (
 290                         'prop' => 'What image information to get.',
 291                         'limit' => 'How many image revisions to return',
 292                         'start' => 'Timestamp to start listing from',
 293                         'end' => 'Timestamp to stop listing at',
 294                         'urlwidth' => array('If iiprop=url is set, a URL to an image scaled to this width will be returned.',
 295                                             'Only the current version of the image can be scaled.'),
 296                         'urlheight' => 'Similar to iiurlwidth. Cannot be used without iiurlwidth',
 297                         'continue' => 'When more results are available, use this to continue',
 298                 );
 299         }
 300
 301         public function getDescription() {
 302                 return array (
 303                         'Returns image information and upload history'
 304                 );
 305         }
 306
 307         protected function getExamples() {
 308                 return array (
 309                         'api.php?action=query&titles=Image:Albert%20Einstein%20Head.jpg&prop=imageinfo',
 310                         'api.php?action=query&titles=Image:Test.jpg&prop=imageinfo&iilimit=50&iiend=20071231235959&iiprop=timestamp|user|url',
 311                 );
 312         }
 313
 314         public function getVersion() {
 315                 return __CLASS__ . ': $Id$';
 316         }
 317 }