includes/ImagePage.php

   1 <?php
   2 /**
   3  * @package MediaWiki
   4  */
   5
   6 /**
   7  *
   8  */
   9 if( !defined( 'MEDIAWIKI' ) )
  10         die( -1 );
  11
  12 require_once( 'Image.php' );
  13
  14 /**
  15  * Special handling for image description pages
  16  * @package MediaWiki
  17  */
  18 class ImagePage extends Article {
  19
  20         /* private */ var $img;  // Image object this page is shown for
  21         var $mExtraDescription = false;
  22
  23         /**
  24          * Handler for action=render
  25          * Include body text only; none of the image extras
  26          */
  27         function render() {
  28                 global $wgOut;
  29                 $wgOut->setArticleBodyOnly( true );
  30                 $wgOut->addSecondaryWikitext( $this->getContent() );
  31         }
  32
  33         function view() {
  34                 global $wgOut, $wgShowEXIF;
  35
  36                 $this->img = new Image( $this->mTitle );
  37
  38                 if( $this->mTitle->getNamespace() == NS_IMAGE  ) {
  39                         if ($wgShowEXIF && $this->img->exists()) {
  40                                 $exif = $this->img->getExifData();
  41                                 $showmeta = count($exif) ? true : false;
  42                         } else {
  43                                 $exif = false;
  44                                 $showmeta = false;
  45                         }
  46
  47                         if ($this->img->exists())
  48                                 $wgOut->addHTML($this->showTOC($showmeta));
  49
  50                         $this->openShowImage();
  51
  52                         # No need to display noarticletext, we use our own message, output in openShowImage()
  53                         if( $this->getID() ) {
  54                                 Article::view();
  55                         } else {
  56                                 # Just need to set the right headers
  57                                 $wgOut->setArticleFlag( true );
  58                                 $wgOut->setRobotpolicy( 'index,follow' );
  59                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  60                                 $this->viewUpdates();
  61                         }
  62
  63                         # Show shared description, if needed
  64                         if( $this->mExtraDescription ) {
  65                                 $fol = wfMsg( 'shareddescriptionfollows' );
  66                                 if( $fol != '-' ) {
  67                                         $wgOut->addWikiText( $fol );
  68                                 }
  69                                 $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . '</div>' );
  70                         }
  71
  72                         $this->closeShowImage();
  73                         $this->imageHistory();
  74                         $this->imageLinks();
  75                         if( $exif ) {
  76                                 global $wgStylePath;
  77                                 $expand = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-expand' ) ) );
  78                                 $collapse = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-collapse' ) ) );
  79                                 $wgOut->addHTML( "<h2 id=\"metadata\">" . wfMsgHtml( 'metadata' ) . "</h2>\n" );
  80                                 $wgOut->addWikiText( $this->makeMetadataTable( $exif ) );
  81                                 $wgOut->addHTML(
  82                                         "<script type=\"text/javascript\" src=\"$wgStylePath/common/metadata.js\"></script>\n" .
  83                                         "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
  84                         }
  85                 } else {
  86                         Article::view();
  87                 }
  88         }
  89
  90         /**
  91          * Create the TOC
  92          *
  93          * @access private
  94          *
  95          * @param bool $metadata Whether or not to show the metadata link
  96          * @return string
  97          */
  98         function showTOC( $metadata ) {
  99                 global $wgLang;
 100                 $r = '<ul id="filetoc">
 101                         <li><a href="#file">' . $wgLang->getNsText( NS_IMAGE ) . '</a></li>
 102                         <li><a href="#filehistory">' . wfMsgHtml( 'imghistory' ) . '</a></li>
 103                         <li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>' .
 104                         ($metadata ? '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>' : '') . '
 105                 </ul>';
 106                 return $r;
 107         }
 108
 109         /**
 110          * Make a table with metadata to be shown in the output page.
 111          *
 112          * @access private
 113          *
 114          * @param array $exif The array containing the EXIF data
 115          * @return string
 116          */
 117         function makeMetadataTable( $exif ) {
 118                 $r = wfMsg( 'metadata-help' ) . "\n\n";
 119                 $r .= "{| id=mw_metadata class=mw_metadata\n";
 120                 $visibleFields = $this->visibleMetadataFields();
 121                 foreach( $exif as $k => $v ) {
 122                         $tag = strtolower( $k );
 123                         $msg = wfMsg( "exif-$tag" );
 124                         $class = "exif-$tag";
 125                         if( !in_array( $tag, $visibleFields ) ) {
 126                                 $class .= ' collapsable';
 127                         }
 128                         $r .= "|- class=\"$class\"\n";
 129                         $r .= "!| $msg\n";
 130                         $r .= "|| $v\n";
 131                 }
 132                 $r .= '|}';
 133                 return $r;
 134         }
 135
 136         /**
 137          * Get a list of EXIF metadata items which should be displayed when
 138          * the metadata table is collapsed.
 139          *
 140          * @return array of strings
 141          * @access private
 142          */
 143         function visibleMetadataFields() {
 144                 $fields = array();
 145                 $lines = explode( "\n", wfMsgForContent( 'metadata-fields' ) );
 146                 foreach( $lines as $line ) {
 147                         if( preg_match( '/^\\*\s*(.*?)\s*$/', $line, $matches ) ) {
 148                                 $fields[] = $matches[1];
 149                         }
 150                 }
 151                 return $fields;
 152         }
 153
 154         /**
 155          * Overloading Article's getContent method.
 156          *
 157          * Omit noarticletext if sharedupload; text will be fetched from the
 158          * shared upload server if possible.
 159          */
 160         function getContent() {
 161                 if( $this->img && $this->img->fromSharedDirectory && 0 == $this->getID() ) {
 162                         return '';
 163                 }
 164                 return Article::getContent();
 165         }
 166
 167         function openShowImage() {
 168                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest, $wgUseImageResize;
 169
 170                 $full_url  = $this->img->getURL();
 171                 $anchoropen = '';
 172                 $anchorclose = '';
 173
 174                 if( $wgUser->getOption( 'imagesize' ) == '' ) {
 175                         $sizeSel = User::getDefaultOption( 'imagesize' );
 176                 } else {
 177                         $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 178                 }
 179                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 180                         $sizeSel = User::getDefaultOption( 'imagesize' );
 181                 }
 182                 $max = $wgImageLimits[$sizeSel];
 183                 $maxWidth = $max[0];
 184                 $maxHeight = $max[1];
 185                 $sk = $wgUser->getSkin();
 186
 187                 if ( $this->img->exists() ) {
 188                         # image
 189                         $width = $this->img->getWidth();
 190                         $height = $this->img->getHeight();
 191                         $showLink = false;
 192
 193                         if ( $this->img->allowInlineDisplay() and $width and $height) {
 194                                 # image
 195
 196                                 # "Download high res version" link below the image
 197                                 $msg = wfMsgHtml('showbigimage', $width, $height, intval( $this->img->getSize()/1024 ) );
 198
 199                                 # We'll show a thumbnail of this image
 200                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 201                                         # Calculate the thumbnail size.
 202                                         # First case, the limiting factor is the width, not the height.
 203                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 204                                                 $height = round( $height * $maxWidth / $width);
 205                                                 $width = $maxWidth;
 206                                                 # Note that $height <= $maxHeight now.
 207                                         } else {
 208                                                 $newwidth = floor( $width * $maxHeight / $height);
 209                                                 $height = round( $height * $newwidth / $width );
 210                                                 $width = $newwidth;
 211                                                 # Note that $height <= $maxHeight now, but might not be identical
 212                                                 # because of rounding.
 213                                         }
 214
 215                                         if( $wgUseImageResize ) {
 216                                                 $thumbnail = $this->img->getThumbnail( $width );
 217                                                 if ( $thumbnail == null ) {
 218                                                         $url = $this->img->getViewURL();
 219                                                 } else {
 220                                                         $url = $thumbnail->getURL();
 221                                                 }
 222                                         } else {
 223                                                 # No resize ability? Show the full image, but scale
 224                                                 # it down in the browser so it fits on the page.
 225                                                 $url = $this->img->getViewURL();
 226                                         }
 227                                         $anchoropen  = "<a href=\"{$full_url}\">";
 228                                         $anchorclose = "</a><br />";
 229                                         if( $this->img->mustRender() ) {
 230                                                 $showLink = true;
 231                                         } else {
 232                                                 $anchorclose .= "\n$anchoropen{$msg}</a>";
 233                                         }
 234                                 } else {
 235                                         $url = $this->img->getViewURL();
 236                                         $showLink = true;
 237                                 }
 238                                 $wgOut->addHTML( '<div class="fullImageLink" id="file">' . $anchoropen .
 239                                      "<img border=\"0\" src=\"{$url}\" width=\"{$width}\" height=\"{$height}\" alt=\"" .
 240                                      htmlspecialchars( $wgRequest->getVal( 'image' ) ).'" />' . $anchorclose . '</div>' );
 241                         } else {
 242                                 #if direct link is allowed but it's not a renderable image, show an icon.
 243                                 if ($this->img->isSafeFile()) {
 244                                         $icon= $this->img->iconThumb();
 245
 246                                         $wgOut->addHTML( '<div class="fullImageLink" id="file"><a href="' . $full_url . '">' .
 247                                         $icon->toHtml() .
 248                                         '</a></div>' );
 249                                 }
 250
 251                                 $showLink = true;
 252                         }
 253
 254
 255                         if ($showLink) {
 256                                 $filename = wfEscapeWikiText( $this->img->getName() );
 257                                 $info = wfMsg( 'fileinfo',
 258                                         ceil($this->img->getSize()/1024.0),
 259                                         $this->img->getMimeType() );
 260
 261                                 if (!$this->img->isSafeFile()) {
 262                                         $warning = wfMsg( 'mediawarning' );
 263                                         $wgOut->addWikiText( <<<END
 264 <div class="fullMedia">
 265 <span class="dangerousLink">[[Media:$filename|$filename]]</span>
 266 <span class="fileInfo"> ($info)</span>
 267 </div>
 268
 269 <div class="mediaWarning">$warning</div>
 270 END
 271                                                 );
 272                                 } else {
 273                                         $wgOut->addWikiText( <<<END
 274 <div class="fullMedia">
 275 [[Media:$filename|$filename]] <span class="fileInfo"> ($info)</span>
 276 </div>
 277 END
 278                                                 );
 279                                 }
 280                         }
 281
 282                         if($this->img->fromSharedDirectory) {
 283                                 $this->printSharedImageText();
 284                         }
 285                 } else {
 286                         # Image does not exist
 287
 288                         $title = Title::makeTitle( NS_SPECIAL, 'Upload' );
 289                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('noimage-linktext'),
 290                                 'wpDestFile=' . urlencode( $this->img->getName() ) );
 291                         $wgOut->addHTML( wfMsgWikiHtml( 'noimage', $link ) );
 292                 }
 293         }
 294
 295         function printSharedImageText() {
 296                 global $wgRepositoryBaseUrl, $wgFetchCommonsDescriptions, $wgOut, $wgUser;
 297
 298                 $url = $wgRepositoryBaseUrl . urlencode($this->mTitle->getDBkey());
 299                 $sharedtext = "<div class='sharedUploadNotice'>" . wfMsgWikiHtml("sharedupload");
 300                 if ($wgRepositoryBaseUrl && !$wgFetchCommonsDescriptions) {
 301
 302                         $sk = $wgUser->getSkin();
 303                         $title = Title::makeTitle( NS_SPECIAL, 'Upload' );
 304                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('shareduploadwiki-linktext'),
 305                         array( 'wpDestFile' => urlencode( $this->img->getName() )));
 306                         $sharedtext .= " " . wfMsgWikiHtml('shareduploadwiki', $link);
 307                 }
 308                 $sharedtext .= "</div>";
 309                 $wgOut->addHTML($sharedtext);
 310
 311                 if ($wgRepositoryBaseUrl && $wgFetchCommonsDescriptions) {
 312                         require_once("HttpFunctions.php");
 313                         $ur = ini_set('allow_url_fopen', true);
 314                         $text = wfGetHTTP($url . '?action=render');
 315                         ini_set('allow_url_fopen', $ur);
 316                         if ($text)
 317                                 $this->mExtraDescription = $text;
 318                 }
 319         }
 320
 321         function getUploadUrl() {
 322                 global $wgServer;
 323                 $uploadTitle = Title::makeTitle( NS_SPECIAL, 'Upload' );
 324                 return $wgServer . $uploadTitle->getLocalUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 325         }
 326
 327         /**
 328          * Print out the various links at the bottom of the image page, e.g. reupload,
 329          * external editing (and instructions link) etc.
 330          */
 331         function uploadLinksBox() {
 332                 global $wgUser, $wgOut;
 333
 334                 if( $this->img->fromSharedDirectory )
 335                         return;
 336
 337                 $sk = $wgUser->getSkin();
 338
 339                 $wgOut->addHtml( '<br /><ul>' );
 340
 341                 # "Upload a new version of this file" link
 342                 if( $wgUser->isAllowed( 'reupload' ) ) {
 343                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 344                         $wgOut->addHtml( "<li><div>{$ulink}</div></li>" );
 345                 }
 346
 347                 # External editing link
 348                 $elink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'edit-externally' ), 'action=edit&externaledit=true&mode=file' );
 349                 $wgOut->addHtml( '<li>' . $elink . '<div>' . wfMsgWikiHtml( 'edit-externally-help' ) . '</div></li>' );
 350
 351                 $wgOut->addHtml( '</ul>' );
 352         }
 353
 354         function closeShowImage()
 355         {
 356                 # For overloading
 357
 358         }
 359
 360         /**
 361          * If the page we've just displayed is in the "Image" namespace,
 362          * we follow it with an upload history of the image and its usage.
 363          */
 364         function imageHistory()
 365         {
 366                 global $wgUser, $wgOut, $wgUseExternalEditor;
 367
 368                 $sk = $wgUser->getSkin();
 369
 370                 $line = $this->img->nextHistoryLine();
 371
 372                 if ( $line ) {
 373                         $list =& new ImageHistoryList( $sk );
 374                         $s = $list->beginImageHistoryList() .
 375                                 $list->imageHistoryLine( true, wfTimestamp(TS_MW, $line->img_timestamp),
 376                                         $this->mTitle->getDBkey(),  $line->img_user,
 377                                         $line->img_user_text, $line->img_size, $line->img_description,
 378                                         $line->img_width, $line->img_height
 379                                 );
 380
 381                         while ( $line = $this->img->nextHistoryLine() ) {
 382                                 $s .= $list->imageHistoryLine( false, $line->img_timestamp,
 383                                         $line->oi_archive_name, $line->img_user,
 384                                         $line->img_user_text, $line->img_size, $line->img_description,
 385                                         $line->img_width, $line->img_height
 386                                 );
 387                         }
 388                         $s .= $list->endImageHistoryList();
 389                 } else { $s=''; }
 390                 $wgOut->addHTML( $s );
 391
 392                 # Exist check because we don't want to show this on pages where an image
 393                 # doesn't exist along with the noimage message, that would suck. -ævar
 394                 if( $wgUseExternalEditor && $this->img->exists() ) {
 395                         $this->uploadLinksBox();
 396                 }
 397
 398         }
 399
 400         function imageLinks()
 401         {
 402                 global $wgUser, $wgOut;
 403
 404                 $wgOut->addHTML( '<h2 id="filelinks">' . wfMsg( 'imagelinks' ) . "</h2>\n" );
 405
 406                 $dbr =& wfGetDB( DB_SLAVE );
 407                 $page = $dbr->tableName( 'page' );
 408                 $imagelinks = $dbr->tableName( 'imagelinks' );
 409
 410                 $sql = "SELECT page_namespace,page_title FROM $imagelinks,$page WHERE il_to=" .
 411                   $dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=page_id";
 412                 $sql = $dbr->limitResult($sql, 500, 0);
 413                 $res = $dbr->query( $sql, "ImagePage::imageLinks" );
 414
 415                 if ( 0 == $dbr->numRows( $res ) ) {
 416                         $wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
 417                         return;
 418                 }
 419                 $wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) .  "</p>\n<ul>" );
 420
 421                 $sk = $wgUser->getSkin();
 422                 while ( $s = $dbr->fetchObject( $res ) ) {
 423                         $name = Title::MakeTitle( $s->page_namespace, $s->page_title );
 424                         $link = $sk->makeKnownLinkObj( $name, "" );
 425                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 426                 }
 427                 $wgOut->addHTML( "</ul>\n" );
 428         }
 429
 430         function delete()
 431         {
 432                 global $wgUser, $wgOut, $wgRequest;
 433
 434                 $confirm = $wgRequest->wasPosted();
 435                 $image = $wgRequest->getVal( 'image' );
 436                 $oldimage = $wgRequest->getVal( 'oldimage' );
 437
 438                 # Only sysops can delete images. Previously ordinary users could delete
 439                 # old revisions, but this is no longer the case.
 440                 if ( !$wgUser->isAllowed('delete') ) {
 441                         $wgOut->sysopRequired();
 442                         return;
 443                 }
 444                 if ( $wgUser->isBlocked() ) {
 445                         return $this->blockedIPpage();
 446                 }
 447                 if ( wfReadOnly() ) {
 448                         $wgOut->readOnlyPage();
 449                         return;
 450                 }
 451
 452                 # Better double-check that it hasn't been deleted yet!
 453                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
 454                 if ( ( !is_null( $image ) )
 455                   && ( '' == trim( $image ) ) ) {
 456                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
 457                         return;
 458                 }
 459
 460                 $this->img  = new Image( $this->mTitle );
 461
 462                 # Deleting old images doesn't require confirmation
 463                 if ( !is_null( $oldimage ) || $confirm ) {
 464                         if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 465                                 $this->doDelete();
 466                         } else {
 467                                 $wgOut->fatalError( wfMsg( 'sessionfailure' ) );
 468                         }
 469                         return;
 470                 }
 471
 472                 if ( !is_null( $image ) ) {
 473                         $q = '&image=' . urlencode( $image );
 474                 } else if ( !is_null( $oldimage ) ) {
 475                         $q = '&oldimage=' . urlencode( $oldimage );
 476                 } else {
 477                         $q = '';
 478                 }
 479                 return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
 480         }
 481
 482         function doDelete()     {
 483                 global $wgOut, $wgRequest, $wgUseSquid;
 484                 global $wgPostCommitUpdateList;
 485
 486                 $fname = 'ImagePage::doDelete';
 487
 488                 $reason = $wgRequest->getVal( 'wpReason' );
 489                 $oldimage = $wgRequest->getVal( 'oldimage' );
 490
 491                 $dbw =& wfGetDB( DB_MASTER );
 492
 493                 if ( !is_null( $oldimage ) ) {
 494                         if ( strlen( $oldimage ) < 16 ) {
 495                                 $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 496                                 return;
 497                         }
 498                         if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 499                                 $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 500                                 return;
 501                         }
 502
 503                         # Invalidate description page cache
 504                         $this->mTitle->invalidateCache();
 505
 506                         # Squid purging
 507                         if ( $wgUseSquid ) {
 508                                 $urlArr = array(
 509                                         wfImageArchiveUrl( $oldimage ),
 510                                         $this->mTitle->getInternalURL()
 511                                 );
 512                                 wfPurgeSquidServers($urlArr);
 513                         }
 514                         $this->doDeleteOldImage( $oldimage );
 515                         $dbw->delete( 'oldimage', array( 'oi_archive_name' => $oldimage ) );
 516                         $deleted = $oldimage;
 517                 } else {
 518                         $image = $this->mTitle->getDBkey();
 519                         $dest = wfImageDir( $image );
 520                         $archive = wfImageDir( $image );
 521
 522                         # Delete the image file if it exists; due to sync problems
 523                         # or manual trimming sometimes the file will be missing.
 524                         $targetFile = "{$dest}/{$image}";
 525                         if( file_exists( $targetFile ) && ! @unlink( $targetFile ) ) {
 526                                 # If the deletion operation actually failed, bug out:
 527                                 $wgOut->fileDeleteError( $targetFile );
 528                                 return;
 529                         }
 530                         $dbw->delete( 'image', array( 'img_name' => $image ) );
 531
 532                         if ( $dbw->affectedRows() ) {
 533                                 # Update site_stats
 534                                 $site_stats = $dbw->tableName( 'site_stats' );
 535                                 $dbw->query( "UPDATE $site_stats SET ss_images=ss_images-1", $fname );
 536                         }
 537
 538
 539                         $res = $dbw->select( 'oldimage', array( 'oi_archive_name' ), array( 'oi_name' => $image ) );
 540
 541                         # Purge archive URLs from the squid
 542                         $urlArr = Array();
 543                         while ( $s = $dbw->fetchObject( $res ) ) {
 544                                 $this->doDeleteOldImage( $s->oi_archive_name );
 545                                 $urlArr[] = wfImageArchiveUrl( $s->oi_archive_name );
 546                         }
 547
 548                         # And also the HTML of all pages using this image
 549                         $linksTo = $this->img->getLinksTo();
 550                         if ( $wgUseSquid ) {
 551                                 $u = SquidUpdate::newFromTitles( $linksTo, $urlArr );
 552                                 array_push( $wgPostCommitUpdateList, $u );
 553                         }
 554
 555                         $dbw->delete( 'oldimage', array( 'oi_name' => $image ) );
 556
 557                         # Image itself is now gone, and database is cleaned.
 558                         # Now we remove the image description page.
 559
 560                         $article = new Article( $this->mTitle );
 561                         $article->doDeleteArticle( $reason ); # ignore errors
 562
 563                         # Invalidate parser cache and client cache for pages using this image
 564                         # This is left until relatively late to reduce lock time
 565                         Title::touchArray( $linksTo );
 566
 567                         /* Delete thumbnails and refresh image metadata cache */
 568                         $this->img->purgeCache();
 569
 570                         $deleted = $image;
 571                 }
 572
 573                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 574                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 575
 576                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
 577                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
 578
 579                 $wgOut->addWikiText( $text );
 580
 581                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedText() );
 582         }
 583
 584         function doDeleteOldImage( $oldimage )
 585         {
 586                 global $wgOut;
 587
 588                 $name = substr( $oldimage, 15 );
 589                 $archive = wfImageArchiveDir( $name );
 590
 591                 # Delete the image if it exists. Sometimes the file will be missing
 592                 # due to manual intervention or weird sync problems; treat that
 593                 # condition gracefully and continue to delete the database entry.
 594                 # Also some records may end up with an empty oi_archive_name field
 595                 # if the original file was missing when a new upload was made;
 596                 # don't try to delete the directory then!
 597                 #
 598                 $targetFile = "{$archive}/{$oldimage}";
 599                 if( $oldimage != '' && file_exists( $targetFile ) && !@unlink( $targetFile ) ) {
 600                         # If we actually have a file and can't delete it, throw an error.
 601                         $wgOut->fileDeleteError( "{$archive}/{$oldimage}" );
 602                 } else {
 603                         # Log the deletion
 604                         $log = new LogPage( 'delete' );
 605                         $log->addEntry( 'delete', $this->mTitle, wfMsg('deletedrevision',$oldimage) );
 606                 }
 607         }
 608
 609         function revert() {
 610                 global $wgOut, $wgRequest, $wgUser;
 611
 612                 $oldimage = $wgRequest->getText( 'oldimage' );
 613                 if ( strlen( $oldimage ) < 16 ) {
 614                         $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 615                         return;
 616                 }
 617                 if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 618                         $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 619                         return;
 620                 }
 621
 622                 if ( wfReadOnly() ) {
 623                         $wgOut->readOnlyPage();
 624                         return;
 625                 }
 626                 if( $wgUser->isAnon() ) {
 627                         $wgOut->errorpage( 'uploadnologin', 'uploadnologintext' );
 628                         return;
 629                 }
 630                 if ( ! $this->mTitle->userCanEdit() ) {
 631                         $wgOut->sysopRequired();
 632                         return;
 633                 }
 634                 if ( $wgUser->isBlocked() ) {
 635                         return $this->blockedIPpage();
 636                 }
 637                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 638                         $wgOut->errorpage( 'internalerror', 'sessionfailure' );
 639                         return;
 640                 }
 641                 $name = substr( $oldimage, 15 );
 642
 643                 $dest = wfImageDir( $name );
 644                 $archive = wfImageArchiveDir( $name );
 645                 $curfile = "{$dest}/{$name}";
 646
 647                 if ( ! is_file( $curfile ) ) {
 648                         $wgOut->fileNotFoundError( htmlspecialchars( $curfile ) );
 649                         return;
 650                 }
 651                 $oldver = wfTimestampNow() . "!{$name}";
 652
 653                 $dbr =& wfGetDB( DB_SLAVE );
 654                 $size = $dbr->selectField( 'oldimage', 'oi_size', array( 'oi_archive_name' => $oldimage )  );
 655
 656                 if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
 657                         $wgOut->fileRenameError( $curfile, "${archive}/{$oldver}" );
 658                         return;
 659                 }
 660                 if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
 661                         $wgOut->fileCopyError( "${archive}/{$oldimage}", $curfile );
 662                 }
 663
 664                 # Record upload and update metadata cache
 665                 $img = Image::newFromName( $name );
 666                 $img->recordUpload( $oldver, wfMsg( "reverted" ) );
 667
 668                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 669                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 670                 $wgOut->addHTML( wfMsg( 'imagereverted' ) );
 671
 672                 $descTitle = $img->getTitle();
 673                 $wgOut->returnToMain( false, $descTitle->getPrefixedText() );
 674         }
 675
 676         function blockedIPpage() {
 677                 require_once( 'EditPage.php' );
 678                 $edit = new EditPage( $this );
 679                 return $edit->blockedIPpage();
 680         }
 681
 682         /**
 683          * Override handling of action=purge
 684          */
 685         function doPurge() {
 686                 $this->img = new Image( $this->mTitle );
 687                 if( $this->img->exists() ) {
 688                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 689                         $linksTo = $this->img->getLinksTo();
 690                         Title::touchArray( $linksTo );
 691                         $this->img->purgeCache();
 692                 } else {
 693                         wfDebug( "ImagePage::doPurge no image\n" );
 694                 }
 695                 parent::doPurge();
 696         }
 697
 698 }
 699
 700 /**
 701  * @todo document
 702  * @package MediaWiki
 703  */
 704 class ImageHistoryList {
 705         function ImageHistoryList( &$skin ) {
 706                 $this->skin =& $skin;
 707         }
 708
 709         function beginImageHistoryList() {
 710                 $s = "\n<h2 id=\"filehistory\">" . wfMsg( 'imghistory' ) . "</h2>\n" .
 711                   "<p>" . wfMsg( 'imghistlegend' ) . "</p>\n".'<ul class="special">';
 712                 return $s;
 713         }
 714
 715         function endImageHistoryList() {
 716                 $s = "</ul>\n";
 717                 return $s;
 718         }
 719
 720         function imageHistoryLine( $iscur, $timestamp, $img, $user, $usertext, $size, $description, $width, $height ) {
 721                 global $wgUser, $wgLang, $wgTitle, $wgContLang;
 722
 723                 $datetime = $wgLang->timeanddate( $timestamp, true );
 724                 $del = wfMsg( 'deleteimg' );
 725                 $delall = wfMsg( 'deleteimgcompletely' );
 726                 $cur = wfMsg( 'cur' );
 727
 728                 if ( $iscur ) {
 729                         $url = Image::imageUrl( $img );
 730                         $rlink = $cur;
 731                         if ( $wgUser->isAllowed('delete') ) {
 732                                 $link = $wgTitle->escapeLocalURL( 'image=' . $wgTitle->getPartialURL() .
 733                                   '&action=delete' );
 734                                 $style = $this->skin->getInternalLinkAttributes( $link, $delall );
 735
 736                                 $dlink = '<a href="'.$link.'"'.$style.'>'.$delall.'</a>';
 737                         } else {
 738                                 $dlink = $del;
 739                         }
 740                 } else {
 741                         $url = htmlspecialchars( wfImageArchiveUrl( $img ) );
 742                         if( $wgUser->getID() != 0 && $wgTitle->userCanEdit() ) {
 743                                 $token = urlencode( $wgUser->editToken( $img ) );
 744                                 $rlink = $this->skin->makeKnownLinkObj( $wgTitle,
 745                                            wfMsg( 'revertimg' ), 'action=revert&oldimage=' .
 746                                            urlencode( $img ) . "&wpEditToken=$token" );
 747                                 $dlink = $this->skin->makeKnownLinkObj( $wgTitle,
 748                                            $del, 'action=delete&oldimage=' . urlencode( $img ) .
 749                                            "&wpEditToken=$token" );
 750                         } else {
 751                                 # Having live active links for non-logged in users
 752                                 # means that bots and spiders crawling our site can
 753                                 # inadvertently change content. Baaaad idea.
 754                                 $rlink = wfMsg( 'revertimg' );
 755                                 $dlink = $del;
 756                         }
 757                 }
 758                 if ( 0 == $user ) {
 759                         $userlink = $usertext;
 760                 } else {
 761                         $userlink = $this->skin->makeLinkObj( Title::makeTitle( NS_USER, $usertext ), $usertext );
 762                         $usertalk = $this->skin->makeLinkObj( Title::makeTitle( NS_USER_TALK, $usertext), $wgContLang->getNsText( NS_TALK ) );
 763                         $userdata = $userlink . ' (' . $usertalk . ')';
 764                 }
 765                 $nbytes = wfMsgExt( 'nbytes', array( 'parsemag', 'escape' ),
 766                         $wgLang->formatNum( $size ) );
 767                 $widthheight = wfMsg( 'widthheight', $width, $height );
 768                 $style = $this->skin->getInternalLinkAttributes( $url, $datetime );
 769
 770                 $s = "<li> ({$dlink}) ({$rlink}) <a href=\"{$url}\"{$style}>{$datetime}</a> . . {$userdata} . . {$widthheight} ({$nbytes})";
 771
 772                 $s .= $this->skin->commentBlock( $description, $wgTitle );
 773                 $s .= "</li>\n";
 774                 return $s;
 775         }
 776
 777 }
 778
 779
 780 ?>