includes/ImagePage.php

   1 <?php
   2 /**
   3  * @package MediaWiki
   4  */
   5
   6 /**
   7  *
   8  */
   9 if( !defined( 'MEDIAWIKI' ) )
  10         die();
  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
  22         function view() {
  23                 global $wgUseExternalEditor, $wgOut ;
  24
  25                 $this->img  = new Image( $this->mTitle );
  26
  27                 if( $this->mTitle->getNamespace() == NS_IMAGE  ) {
  28                         $this->openShowImage();
  29                         if ( $this->img->exists() ) $this->showEXIFdata();
  30
  31                         # No need to display noarticletext, we use our own message, output in openShowImage()
  32                         if ( $this->getID() ) {
  33                                 Article::view();
  34                         } else {
  35                                 # Just need to set the right headers
  36                                 $wgOut->setArticleFlag( true );
  37                                 $wgOut->setRobotpolicy( 'index,follow' );
  38                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  39                                 $wgOut->addMetaTags();
  40                                 $this->viewUpdates();
  41                         }
  42
  43                         if ( $this->img->exists() ) {
  44                                 $this->uploadNewVersionLink();
  45                                 if ( $wgUseExternalEditor && $this->img->exists() ) {
  46                                         $this->externalEditorLink();
  47                                 }
  48                         }
  49                         $this->closeShowImage();
  50                         $this->imageHistory();
  51                         $this->imageLinks();
  52                 } else {
  53                         Article::view();
  54                 }
  55         }
  56
  57         function showEXIFdata() {
  58                 global $wgOut, $wgShowEXIF;
  59                 if ( ! $wgShowEXIF ) return;
  60
  61                 # Get the EXIF data
  62                 $exif = $this->img->getExifData();
  63                 if ( count ( $exif ) == 0 ) return; # No EXIF data available
  64
  65                 # Create the table
  66                 $r = "{| class=exif\n" ;
  67                 $r .= '|+ ' . wfMsg( 'exifdata' ) . "\n|-\n" ;
  68                 foreach ( $exif as $k => $v ) {
  69                         $r .= "! $k\n";
  70                         $r .= '| ' . htmlspecialchars($v) . "\n|-\n";
  71                 }
  72                 $wgOut->addWikiText( substr($r, 0, -3) . '|}' );
  73         }
  74
  75         function openShowImage()
  76         {
  77                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
  78                        $wgUseImageResize, $wgRepositoryBaseUrl,
  79                        $wgUseExternalEditor, $wgServer;
  80                 $full_url  = $this->img->getViewURL();
  81                 $anchoropen = '';
  82                 $anchorclose = '';
  83
  84                 if( $wgUser->getOption( 'imagesize' ) == '' ) {
  85                         $sizeSel = User::getDefaultOption( 'imagesize' );
  86                 } else {
  87                         $sizeSel = IntVal( $wgUser->getOption( 'imagesize' ) );
  88                 }
  89                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
  90                         $sizeSel = User::getDefaultOption( 'imagesize' );
  91                 }
  92                 $max = $wgImageLimits[$sizeSel];
  93                 $maxWidth = $max[0];
  94                 $maxHeight = $max[1];
  95                 $sk = $wgUser->getSkin();
  96
  97                 if ( $this->img->exists() ) {
  98                         if ( $this->img->getType() != '' ) {
  99                                 # image
 100                                 $width = $this->img->getWidth();
 101                                 $height = $this->img->getHeight();
 102                                 $msg = wfMsg('showbigimage', $width, $height, intval( $this->img->getSize()/1024 ) );
 103                                 if ( $width > $maxWidth ) {
 104                                         $height = floor( $height * $maxWidth / $width );
 105                                         $width  = $maxWidth;
 106                                 }
 107                                 if ( $height > $maxHeight ) {
 108                                         $width = floor( $width * $maxHeight / $height );
 109                                         $height = $maxHeight;
 110                                 }
 111                                 if ( $width != $this->img->getWidth() || $height != $this->img->getHeight() ) {
 112                                         if( $wgUseImageResize ) {
 113                                                 $thumbnail = $this->img->getThumbnail( $width );
 114                                                 $url = $thumbnail->getUrl();
 115                                         } else {
 116                                                 # No resize ability? Show the full image, but scale
 117                                                 # it down in the browser so it fits on the page.
 118                                                 $url = $full_url;
 119                                         }
 120                                         $anchoropen  = "<a href=\"{$full_url}\">";
 121                                         $anchorclose = "</a><br />\n$anchoropen{$msg}</a>";
 122                                 } else {
 123                                         $url = $full_url;
 124                                 }
 125                                 $s = '<div class="fullImageLink">' . $anchoropen .
 126                                      "<img border=\"0\" src=\"{$url}\" width=\"{$width}\" height=\"{$height}\" alt=\"" .
 127                                      htmlspecialchars( $wgRequest->getVal( 'image' ) ).'" />' . $anchorclose . '</div>';
 128                         } else {
 129                                 $s = "<div class=\"fullMedia\">" . $sk->makeMediaLink( $this->img->getName(),'' ) . '</div>';
 130                         }
 131                         $wgOut->addHTML( $s );
 132                         if($this->img->fromSharedDirectory) {
 133                                 $sharedtext="<div class=\"sharedUploadNotice\">" . wfMsg("sharedupload");
 134                                 if($wgRepositoryBaseUrl) {
 135                                         $sharedtext .= " ". wfMsg("shareduploadwiki",$wgRepositoryBaseUrl . urlencode($this->mTitle->getDBkey()));
 136                                 }
 137                                 $sharedtext.="</div>";
 138                                 $wgOut->addWikiText($sharedtext);
 139                         }
 140
 141                 } else {
 142                         # Image does not exist
 143                         $wgOut->addWikiText( wfMsg( 'noimage', $this->getUploadUrl() ) );
 144                 }
 145         }
 146
 147         function getUploadUrl() {
 148                 global $wgServer;
 149                 $uploadTitle = Title::makeTitle( NS_SPECIAL, 'Upload' );
 150                 return $wgServer . $uploadTitle->getLocalUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 151         }
 152
 153
 154         function uploadNewVersionLink() {
 155                 global $wgOut;
 156                 $wgOut->addHTML("<div class='editExternally'>");
 157                 $wgOut->addWikiText( wfMsg( 'uploadnewversion', $this->getUploadUrl() ) );
 158                 $wgOut->addHTML("</div><br clear='both' />");
 159         }
 160
 161         function externalEditorLink()
 162         {
 163                 global $wgUser,$wgOut;
 164                 $sk = $wgUser->getSkin();
 165                 $wgOut->addHTML( '<div class="editExternally">' );
 166                 $wgOut->addHTML( $sk->makeKnownLinkObj( $this->mTitle,
 167                         wfMsg( 'edit-externally' ),
 168                         "action=edit&externaledit=true&mode=file" ) );
 169                 $wgOut->addWikiText( '<div class="editExternallyHelp">' .
 170                         wfMsg('edit-externally-help') . '</div>' );
 171                 $wgOut->addHTML( '</div><br clear="all" />' );
 172         }
 173
 174         function closeShowImage()
 175         {
 176                 # For overloading
 177
 178         }
 179
 180         /**
 181          * If the page we've just displayed is in the "Image" namespace,
 182          * we follow it with an upload history of the image and its usage.
 183          */
 184         function imageHistory()
 185         {
 186                 global $wgUser, $wgOut;
 187
 188                 $sk = $wgUser->getSkin();
 189
 190                 $line = $this->img->nextHistoryLine();
 191
 192                 if ( $line ) {
 193                         $list =& new ImageHistoryList( $sk );
 194                         $s = $list->beginImageHistoryList() .
 195                                 $list->imageHistoryLine( true, $line->img_timestamp,
 196                                         $this->mTitle->getDBkey(),  $line->img_user,
 197                                         $line->img_user_text, $line->img_size, $line->img_description );
 198
 199                         while ( $line = $this->img->nextHistoryLine() ) {
 200                                 $s .= $list->imageHistoryLine( false, $line->img_timestamp,
 201                                 $line->oi_archive_name, $line->img_user,
 202                                 $line->img_user_text, $line->img_size, $line->img_description );
 203                         }
 204                         $s .= $list->endImageHistoryList();
 205                 } else { $s=''; }
 206                 $wgOut->addHTML( $s );
 207         }
 208
 209         function imageLinks()
 210         {
 211                 global $wgUser, $wgOut;
 212
 213                 $wgOut->addHTML( '<h2>' . wfMsg( 'imagelinks' ) . "</h2>\n" );
 214
 215                 $dbr =& wfGetDB( DB_SLAVE );
 216                 $page = $dbr->tableName( 'page' );
 217                 $imagelinks = $dbr->tableName( 'imagelinks' );
 218
 219                 $sql = "SELECT page_namespace,page_title FROM $imagelinks,$page WHERE il_to=" .
 220                   $dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=page_id"
 221                   . " LIMIT 500"; # quickie emergency brake
 222                 $res = $dbr->query( $sql, "ImagePage::imageLinks" );
 223
 224                 if ( 0 == $dbr->numRows( $res ) ) {
 225                         $wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
 226                         return;
 227                 }
 228                 $wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) .  "</p>\n<ul>" );
 229
 230                 $sk = $wgUser->getSkin();
 231                 while ( $s = $dbr->fetchObject( $res ) ) {
 232                         $name = Title::MakeTitle( $s->page_namespace, $s->page_title );
 233                         $link = $sk->makeKnownLinkObj( $name, "" );
 234                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 235                 }
 236                 $wgOut->addHTML( "</ul>\n" );
 237         }
 238
 239         function delete()
 240         {
 241                 global $wgUser, $wgOut, $wgRequest;
 242
 243                 $confirm = $wgRequest->getBool( 'wpConfirmB' );
 244                 $image = $wgRequest->getVal( 'image' );
 245                 $oldimage = $wgRequest->getVal( 'oldimage' );
 246
 247                 # Only sysops can delete images. Previously ordinary users could delete
 248                 # old revisions, but this is no longer the case.
 249                 if ( !$wgUser->isAllowed('delete') ) {
 250                         $wgOut->sysopRequired();
 251                         return;
 252                 }
 253                 if ( wfReadOnly() ) {
 254                         $wgOut->readOnlyPage();
 255                         return;
 256                 }
 257
 258                 # Better double-check that it hasn't been deleted yet!
 259                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
 260                 if ( ( !is_null( $image ) )
 261                   && ( '' == trim( $image ) ) ) {
 262                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
 263                         return;
 264                 }
 265
 266                 $this->img  = new Image( $this->mTitle );
 267
 268                 # Deleting old images doesn't require confirmation
 269                 if ( !is_null( $oldimage ) || $confirm ) {
 270                         if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 271                                 $this->doDelete();
 272                         } else {
 273                                 $wgOut->fatalError( wfMsg( 'sessionfailure' ) );
 274                         }
 275                         return;
 276                 }
 277
 278                 if ( !is_null( $image ) ) {
 279                         $q = '&image=' . urlencode( $image );
 280                 } else if ( !is_null( $oldimage ) ) {
 281                         $q = '&oldimage=' . urlencode( $oldimage );
 282                 } else {
 283                         $q = '';
 284                 }
 285                 return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
 286         }
 287
 288         function doDelete()
 289         {
 290                 global $wgOut, $wgUser, $wgContLang, $wgRequest;
 291                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList;
 292                 $fname = 'ImagePage::doDelete';
 293
 294                 $reason = $wgRequest->getVal( 'wpReason' );
 295                 $oldimage = $wgRequest->getVal( 'oldimage' );
 296
 297                 $dbw =& wfGetDB( DB_MASTER );
 298
 299                 if ( !is_null( $oldimage ) ) {
 300                         if ( strlen( $oldimage ) < 16 ) {
 301                                 $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 302                                 return;
 303                         }
 304                         if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 305                                 $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 306                                 return;
 307                         }
 308
 309                         # Invalidate description page cache
 310                         $this->mTitle->invalidateCache();
 311
 312                         # Squid purging
 313                         if ( $wgUseSquid ) {
 314                                 $urlArr = Array(
 315                                         $wgInternalServer.wfImageArchiveUrl( $oldimage ),
 316                                         $wgInternalServer.$this->mTitle->getFullURL()
 317                                 );
 318                                 wfPurgeSquidServers($urlArr);
 319                         }
 320                         $this->doDeleteOldImage( $oldimage );
 321                         $dbw->delete( 'oldimage', array( 'oi_archive_name' => $oldimage ) );
 322                         $deleted = $oldimage;
 323                 } else {
 324                         $image = $this->mTitle->getDBkey();
 325                         $dest = wfImageDir( $image );
 326                         $archive = wfImageDir( $image );
 327
 328                         # Delete the image file if it exists; due to sync problems
 329                         # or manual trimming sometimes the file will be missing.
 330                         $targetFile = "{$dest}/{$image}";
 331                         if( file_exists( $targetFile ) && ! @unlink( $targetFile ) ) {
 332                                 # If the deletion operation actually failed, bug out:
 333                                 $wgOut->fileDeleteError( $targetFile );
 334                                 return;
 335                         }
 336                         $dbw->delete( 'image', array( 'img_name' => $image ) );
 337                         $res = $dbw->select( 'oldimage', array( 'oi_archive_name' ), array( 'oi_name' => $image ) );
 338
 339                         # Purge archive URLs from the squid
 340                         $urlArr = Array();
 341                         while ( $s = $dbw->fetchObject( $res ) ) {
 342                                 $this->doDeleteOldImage( $s->oi_archive_name );
 343                                 $urlArr[] = $wgInternalServer.wfImageArchiveUrl( $s->oi_archive_name );
 344                         }
 345
 346                         # And also the HTML of all pages using this image
 347                         $linksTo = $this->img->getLinksTo();
 348                         if ( $wgUseSquid ) {
 349                                 $u = SquidUpdate::newFromTitles( $linksTo, $urlArr );
 350                                 array_push( $wgPostCommitUpdateList, $u );
 351                         }
 352
 353                         $dbw->delete( 'oldimage', array( 'oi_name' => $image ) );
 354
 355                         # Image itself is now gone, and database is cleaned.
 356                         # Now we remove the image description page.
 357
 358                         $article = new Article( $this->mTitle );
 359                         $article->doDeleteArticle( $reason ); # ignore errors
 360
 361                         # Invalidate parser cache and client cache for pages using this image
 362                         # This is left until relatively late to reduce lock time
 363                         Title::touchArray( $linksTo );
 364
 365                         /* Delete thumbnails and refresh image metadata cache */
 366                         $this->img->purgeCache();
 367
 368
 369                         $deleted = $image;
 370                 }
 371
 372                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 373                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 374
 375                 $sk = $wgUser->getSkin();
 376                 $loglink = $sk->makeKnownLinkObj(
 377                         Title::makeTitle( NS_SPECIAL, 'Log/delete' ),
 378                         wfMsg( 'deletionlog' ) );
 379
 380                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
 381
 382                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
 383                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedText() );
 384         }
 385
 386         function doDeleteOldImage( $oldimage )
 387         {
 388                 global $wgOut;
 389
 390                 $name = substr( $oldimage, 15 );
 391                 $archive = wfImageArchiveDir( $name );
 392
 393                 # Delete the image if it exists. Sometimes the file will be missing
 394                 # due to manual intervention or weird sync problems; treat that
 395                 # condition gracefully and continue to delete the database entry.
 396                 # Also some records may end up with an empty oi_archive_name field
 397                 # if the original file was missing when a new upload was made;
 398                 # don't try to delete the directory then!
 399                 #
 400                 $targetFile = "{$archive}/{$oldimage}";
 401                 if( $oldimage != '' && file_exists( $targetFile ) && !@unlink( $targetFile ) ) {
 402                         # If we actually have a file and can't delete it, throw an error.
 403                         $wgOut->fileDeleteError( "{$archive}/{$oldimage}" );
 404                 } else {
 405                         # Log the deletion
 406                         $log = new LogPage( 'delete' );
 407                         $log->addEntry( 'delete', $this->mTitle, wfMsg('deletedrevision',$oldimage) );
 408                 }
 409         }
 410
 411         function revert()
 412         {
 413                 global $wgOut, $wgRequest, $wgUser;
 414                 global $wgUseSquid, $wgInternalServer, $wgDeferredUpdateList;
 415
 416                 $oldimage = $wgRequest->getText( 'oldimage' );
 417                 if ( strlen( $oldimage ) < 16 ) {
 418                         $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 419                         return;
 420                 }
 421                 if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 422                         $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 423                         return;
 424                 }
 425
 426                 if ( wfReadOnly() ) {
 427                         $wgOut->readOnlyPage();
 428                         return;
 429                 }
 430                 if( $wgUser->isAnon() ) {
 431                         $wgOut->errorpage( 'uploadnologin', 'uploadnologintext' );
 432                         return;
 433                 }
 434                 if ( ! $this->mTitle->userCanEdit() ) {
 435                         $wgOut->sysopRequired();
 436                         return;
 437                 }
 438                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 439                         $wgOut->errorpage( 'internalerror', 'sessionfailure' );
 440                         return;
 441                 }
 442                 $name = substr( $oldimage, 15 );
 443
 444                 $dest = wfImageDir( $name );
 445                 $archive = wfImageArchiveDir( $name );
 446                 $curfile = "{$dest}/{$name}";
 447
 448                 if ( ! is_file( $curfile ) ) {
 449                         $wgOut->fileNotFoundError( htmlspecialchars( $curfile ) );
 450                         return;
 451                 }
 452                 $oldver = wfTimestampNow() . "!{$name}";
 453
 454                 $dbr =& wfGetDB( DB_SLAVE );
 455                 $size = $dbr->selectField( 'oldimage', 'oi_size', array( 'oi_archive_name' => $oldimage )  );
 456
 457                 if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
 458                         $wgOut->fileRenameError( $curfile, "${archive}/{$oldver}" );
 459                         return;
 460                 }
 461                 if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
 462                         $wgOut->fileCopyError( "${archive}/{$oldimage}", $curfile );
 463                 }
 464
 465                 # Record upload and update metadata cache
 466                 $img = Image::newFromName( $name );
 467                 $img->recordUpload( $oldver, wfMsg( "reverted" ) );
 468
 469                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 470                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 471                 $wgOut->addHTML( wfMsg( 'imagereverted' ) );
 472
 473                 $descTitle = $img->getTitle();
 474                 $wgOut->returnToMain( false, $descTitle->getPrefixedText() );
 475         }
 476 }
 477
 478 /**
 479  * @todo document
 480  * @package MediaWiki
 481  */
 482 class ImageHistoryList {
 483         function ImageHistoryList( &$skin ) {
 484                 $this->skin =& $skin;
 485         }
 486
 487         function beginImageHistoryList() {
 488                 $s = "\n<h2>" . wfMsg( 'imghistory' ) . "</h2>\n" .
 489                   "<p>" . wfMsg( 'imghistlegend' ) . "</p>\n".'<ul class="special">';
 490                 return $s;
 491         }
 492
 493         function endImageHistoryList() {
 494                 $s = "</ul>\n";
 495                 return $s;
 496         }
 497
 498         function imageHistoryLine( $iscur, $timestamp, $img, $user, $usertext, $size, $description ) {
 499                 global $wgUser, $wgLang, $wgContLang, $wgTitle;
 500
 501                 $datetime = $wgLang->timeanddate( $timestamp, true );
 502                 $del = wfMsg( 'deleteimg' );
 503                 $delall = wfMsg( 'deleteimgcompletely' );
 504                 $cur = wfMsg( 'cur' );
 505
 506                 if ( $iscur ) {
 507                         $url = Image::imageUrl( $img );
 508                         $rlink = $cur;
 509                         if ( $wgUser->isAllowed('delete') ) {
 510                                 $link = $wgTitle->escapeLocalURL( 'image=' . $wgTitle->getPartialURL() .
 511                                   '&action=delete' );
 512                                 $style = $this->skin->getInternalLinkAttributes( $link, $delall );
 513
 514                                 $dlink = '<a href="'.$link.'"'.$style.'>'.$delall.'</a>';
 515                         } else {
 516                                 $dlink = $del;
 517                         }
 518                 } else {
 519                         $url = htmlspecialchars( wfImageArchiveUrl( $img ) );
 520                         if( $wgUser->getID() != 0 && $wgTitle->userCanEdit() ) {
 521                                 $token = urlencode( $wgUser->editToken( $img ) );
 522                                 $rlink = $this->skin->makeKnownLinkObj( $wgTitle,
 523                                            wfMsg( 'revertimg' ), 'action=revert&oldimage=' .
 524                                            urlencode( $img ) . "&wpEditToken=$token" );
 525                                 $dlink = $this->skin->makeKnownLinkObj( $wgTitle,
 526                                            $del, 'action=delete&oldimage=' . urlencode( $img ) .
 527                                            "&wpEditToken=$token" );
 528                         } else {
 529                                 # Having live active links for non-logged in users
 530                                 # means that bots and spiders crawling our site can
 531                                 # inadvertently change content. Baaaad idea.
 532                                 $rlink = wfMsg( 'revertimg' );
 533                                 $dlink = $del;
 534                         }
 535                 }
 536                 if ( 0 == $user ) {
 537                         $userlink = $usertext;
 538                 } else {
 539                         $userlink = $this->skin->makeLinkObj(
 540                                 Title::makeTitle( NS_USER, $usertext ),
 541                                 $usertext );
 542                 }
 543                 $nbytes = wfMsg( 'nbytes', $size );
 544                 $style = $this->skin->getInternalLinkAttributes( $url, $datetime );
 545
 546                 $s = "<li> ({$dlink}) ({$rlink}) <a href=\"{$url}\"{$style}>{$datetime}</a>"
 547                   . " . . {$userlink} ({$nbytes})";
 548
 549                 $s .= $this->skin->commentBlock( $description, $wgTitle );
 550                 $s .= "</li>\n";
 551                 return $s;
 552         }
 553
 554 }
 555
 556
 557 ?>