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                 {
  59                 global $wgOut , $wgShowEXIF ;
  60                 if ( ! $wgShowEXIF ) return ;
  61
  62                 # Get the EXIF data
  63                 $exif = $this->img->getExifData () ;
  64                 if ( count ( $exif ) == 0 ) return ; # No EXIF data available
  65                 if ( count ( $exif ) == 1 && isset ( $exif["EXIF"] ) && $exif["EXIF"] == "NO" ) return ; # This image does not have EXIF data
  66
  67                 # Create the table
  68                 $r = "<table border='1' cellspacing='0' cellpadding='0' align='right'>" ;
  69                 $r .= "<caption>EXIF data</caption>" ;
  70                 foreach ( $exif AS $k => $v ) {
  71                         $r .= "<tr>" ;
  72                         $v = str_replace ( "\0" , "" , $v ) ;
  73                         $r .= "<th><small>" . htmlspecialchars ( $k ) . "</small></th>" ;
  74                         $r .= "<td><small>" . htmlspecialchars ( $v ) . "</small></td>" ;
  75                         $r .= "</tr>" ;
  76                         }
  77                 $r .= "</table>" ;
  78                 $wgOut->addHTML ( $r ) ;
  79                 }
  80
  81         function openShowImage()
  82         {
  83                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
  84                        $wgUseImageResize, $wgRepositoryBaseUrl,
  85                        $wgUseExternalEditor, $wgServer;
  86                 $full_url  = $this->img->getViewURL();
  87                 $anchoropen = '';
  88                 $anchorclose = '';
  89
  90                 if( $wgUser->getOption( 'imagesize' ) == '' ) {
  91                         $sizeSel = User::getDefaultOption( 'imagesize' );
  92                 } else {
  93                         $sizeSel = IntVal( $wgUser->getOption( 'imagesize' ) );
  94                 }
  95                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
  96                         $sizeSel = User::getDefaultOption( 'imagesize' );
  97                 }
  98                 $max = $wgImageLimits[$sizeSel];
  99                 $maxWidth = $max[0];
 100                 $maxHeight = $max[1];
 101                 $sk = $wgUser->getSkin();
 102
 103                 if ( $this->img->exists() ) {
 104                         if ( $this->img->getType() != '' ) {
 105                                 # image
 106                                 $width = $this->img->getWidth();
 107                                 $height = $this->img->getHeight();
 108                                 $msg = wfMsg('showbigimage', $width, $height, intval( $this->img->getSize()/1024 ) );
 109                                 if ( $width > $maxWidth ) {
 110                                         $height = floor( $height * $maxWidth / $width );
 111                                         $width  = $maxWidth;
 112                                 }
 113                                 if ( $height > $maxHeight ) {
 114                                         $width = floor( $width * $maxHeight / $height );
 115                                         $height = $maxHeight;
 116                                 }
 117                                 if ( $width != $this->img->getWidth() || $height != $this->img->getHeight() ) {
 118                                         if( $wgUseImageResize ) {
 119                                                 $thumbnail = $this->img->getThumbnail( $width );
 120                                                 $url = $thumbnail->getUrl();
 121                                         } else {
 122                                                 # No resize ability? Show the full image, but scale
 123                                                 # it down in the browser so it fits on the page.
 124                                                 $url = $full_url;
 125                                         }
 126                                         $anchoropen  = "<a href=\"{$full_url}\">";
 127                                         $anchorclose = "</a><br />\n$anchoropen{$msg}</a>";
 128                                 } else {
 129                                         $url = $full_url;
 130                                 }
 131                                 $s = '<div class="fullImageLink">' . $anchoropen .
 132                                      "<img border=\"0\" src=\"{$url}\" width=\"{$width}\" height=\"{$height}\" alt=\"" .
 133                                      htmlspecialchars( $wgRequest->getVal( 'image' ) ).'" />' . $anchorclose . '</div>';
 134                         } else {
 135                                 $s = "<div class=\"fullMedia\">" . $sk->makeMediaLink( $this->img->getName(),'' ) . '</div>';
 136                         }
 137                         $wgOut->addHTML( $s );
 138                         if($this->img->fromSharedDirectory) {
 139                                 $sharedtext="<div class=\"sharedUploadNotice\">" . wfMsg("sharedupload");
 140                                 if($wgRepositoryBaseUrl) {
 141                                         $sharedtext .= " ". wfMsg("shareduploadwiki",$wgRepositoryBaseUrl . urlencode($this->mTitle->getDBkey()));
 142                                 }
 143                                 $sharedtext.="</div>";
 144                                 $wgOut->addWikiText($sharedtext);
 145                         }
 146
 147                 } else {
 148                         # Image does not exist
 149                         $wgOut->addWikiText( wfMsg( 'noimage', $this->getUploadUrl() ) );
 150                 }
 151         }
 152
 153         function getUploadUrl() {
 154                 global $wgServer;
 155                 $uploadTitle = Title::makeTitle( NS_SPECIAL, 'Upload' );
 156                 return $wgServer . $uploadTitle->getLocalUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 157         }
 158
 159
 160         function uploadNewVersionLink() {
 161                 global $wgOut;
 162                 $wgOut->addWikiText( wfMsg( 'uploadnewversion', $this->getUploadUrl() ) );
 163         }
 164
 165         function externalEditorLink()
 166         {
 167                 global $wgUser,$wgOut;
 168                 $sk = $wgUser->getSkin();
 169                 $wgOut->addHTML( '<div class="editExternally">' );
 170                 $wgOut->addHTML( $sk->makeKnownLinkObj( $this->mTitle,
 171                         wfMsg( 'edit-externally' ),
 172                         "action=edit&externaledit=true&mode=file" ) );
 173                 $wgOut->addWikiText( '<div class="editExternallyHelp">' .
 174                         wfMsg('edit-externally-help') . '</div>' );
 175                 $wgOut->addHTML( '</div><br clear="both" />' );
 176         }
 177
 178         function closeShowImage()
 179         {
 180                 # For overloading
 181
 182         }
 183
 184         /**
 185          * If the page we've just displayed is in the "Image" namespace,
 186          * we follow it with an upload history of the image and its usage.
 187          */
 188         function imageHistory()
 189         {
 190                 global $wgUser, $wgOut;
 191
 192                 $sk = $wgUser->getSkin();
 193
 194                 $line = $this->img->nextHistoryLine();
 195
 196                 if ( $line ) {
 197                         $list =& new ImageHistoryList( $sk );
 198                         $s = $list->beginImageHistoryList() .
 199                                 $list->imageHistoryLine( true, $line->img_timestamp,
 200                                         $this->mTitle->getDBkey(),  $line->img_user,
 201                                         $line->img_user_text, $line->img_size, $line->img_description );
 202
 203                         while ( $line = $this->img->nextHistoryLine() ) {
 204                                 $s .= $list->imageHistoryLine( false, $line->img_timestamp,
 205                                 $line->oi_archive_name, $line->img_user,
 206                                 $line->img_user_text, $line->img_size, $line->img_description );
 207                         }
 208                         $s .= $list->endImageHistoryList();
 209                 } else { $s=''; }
 210                 $wgOut->addHTML( $s );
 211         }
 212
 213         function imageLinks()
 214         {
 215                 global $wgUser, $wgOut;
 216
 217                 $wgOut->addHTML( '<h2>' . wfMsg( 'imagelinks' ) . "</h2>\n" );
 218
 219                 $dbr =& wfGetDB( DB_SLAVE );
 220                 $page = $dbr->tableName( 'page' );
 221                 $imagelinks = $dbr->tableName( 'imagelinks' );
 222
 223                 $sql = "SELECT page_namespace,page_title FROM $imagelinks,$page WHERE il_to=" .
 224                   $dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=page_id"
 225                   . " LIMIT 500"; # quickie emergency brake
 226                 $res = $dbr->query( $sql, "ImagePage::imageLinks" );
 227
 228                 if ( 0 == $dbr->numRows( $res ) ) {
 229                         $wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
 230                         return;
 231                 }
 232                 $wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) .  "</p>\n<ul>" );
 233
 234                 $sk = $wgUser->getSkin();
 235                 while ( $s = $dbr->fetchObject( $res ) ) {
 236                         $name = Title::MakeTitle( $s->page_namespace, $s->page_title );
 237                         $link = $sk->makeKnownLinkObj( $name, "" );
 238                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 239                 }
 240                 $wgOut->addHTML( "</ul>\n" );
 241         }
 242
 243         function delete()
 244         {
 245                 global $wgUser, $wgOut, $wgRequest;
 246
 247                 $confirm = $wgRequest->getBool( 'wpConfirmB' );
 248                 $image = $wgRequest->getVal( 'image' );
 249                 $oldimage = $wgRequest->getVal( 'oldimage' );
 250
 251                 # Only sysops can delete images. Previously ordinary users could delete
 252                 # old revisions, but this is no longer the case.
 253                 if ( !$wgUser->isAllowed('delete') ) {
 254                         $wgOut->sysopRequired();
 255                         return;
 256                 }
 257                 if ( wfReadOnly() ) {
 258                         $wgOut->readOnlyPage();
 259                         return;
 260                 }
 261
 262                 # Better double-check that it hasn't been deleted yet!
 263                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
 264                 if ( ( !is_null( $image ) )
 265                   && ( '' == trim( $image ) ) ) {
 266                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
 267                         return;
 268                 }
 269
 270                 $this->img  = new Image( $this->mTitle );
 271
 272                 # Deleting old images doesn't require confirmation
 273                 if ( !is_null( $oldimage ) || $confirm ) {
 274                         if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 275                                 $this->doDelete();
 276                         } else {
 277                                 $wgOut->fatalError( wfMsg( 'sessionfailure' ) );
 278                         }
 279                         return;
 280                 }
 281
 282                 if ( !is_null( $image ) ) {
 283                         $q = '&image=' . urlencode( $image );
 284                 } else if ( !is_null( $oldimage ) ) {
 285                         $q = '&oldimage=' . urlencode( $oldimage );
 286                 } else {
 287                         $q = '';
 288                 }
 289                 return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
 290         }
 291
 292         function doDelete()
 293         {
 294                 global $wgOut, $wgUser, $wgContLang, $wgRequest;
 295                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList;
 296                 $fname = 'ImagePage::doDelete';
 297
 298                 $reason = $wgRequest->getVal( 'wpReason' );
 299                 $oldimage = $wgRequest->getVal( 'oldimage' );
 300
 301                 $dbw =& wfGetDB( DB_MASTER );
 302
 303                 if ( !is_null( $oldimage ) ) {
 304                         if ( strlen( $oldimage ) < 16 ) {
 305                                 $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 306                                 return;
 307                         }
 308                         if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 309                                 $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 310                                 return;
 311                         }
 312
 313                         # Invalidate description page cache
 314                         $this->mTitle->invalidateCache();
 315
 316                         # Squid purging
 317                         if ( $wgUseSquid ) {
 318                                 $urlArr = Array(
 319                                         $wgInternalServer.wfImageArchiveUrl( $oldimage ),
 320                                         $wgInternalServer.$this->mTitle->getFullURL()
 321                                 );
 322                                 wfPurgeSquidServers($urlArr);
 323                         }
 324                         $this->doDeleteOldImage( $oldimage );
 325                         $dbw->delete( 'oldimage', array( 'oi_archive_name' => $oldimage ) );
 326                         $deleted = $oldimage;
 327                 } else {
 328                         $image = $this->mTitle->getDBkey();
 329                         $dest = wfImageDir( $image );
 330                         $archive = wfImageDir( $image );
 331
 332                         # Delete the image file if it exists; due to sync problems
 333                         # or manual trimming sometimes the file will be missing.
 334                         $targetFile = "{$dest}/{$image}";
 335                         if( file_exists( $targetFile ) && ! @unlink( $targetFile ) ) {
 336                                 # If the deletion operation actually failed, bug out:
 337                                 $wgOut->fileDeleteError( $targetFile );
 338                                 return;
 339                         }
 340                         $dbw->delete( 'image', array( 'img_name' => $image ) );
 341                         $res = $dbw->select( 'oldimage', array( 'oi_archive_name' ), array( 'oi_name' => $image ) );
 342
 343                         # Purge archive URLs from the squid
 344                         $urlArr = Array();
 345                         while ( $s = $dbw->fetchObject( $res ) ) {
 346                                 $this->doDeleteOldImage( $s->oi_archive_name );
 347                                 $urlArr[] = $wgInternalServer.wfImageArchiveUrl( $s->oi_archive_name );
 348                         }
 349
 350                         # And also the HTML of all pages using this image
 351                         $linksTo = $this->img->getLinksTo();
 352                         if ( $wgUseSquid ) {
 353                                 $u = SquidUpdate::newFromTitles( $linksTo, $urlArr );
 354                                 array_push( $wgPostCommitUpdateList, $u );
 355                         }
 356
 357                         $dbw->delete( 'oldimage', array( 'oi_name' => $image ) );
 358
 359                         # Image itself is now gone, and database is cleaned.
 360                         # Now we remove the image description page.
 361
 362                         $article = new Article( $this->mTitle );
 363                         $article->doDeleteArticle( $reason ); # ignore errors
 364
 365                         # Invalidate parser cache and client cache for pages using this image
 366                         # This is left until relatively late to reduce lock time
 367                         Title::touchArray( $linksTo );
 368
 369                         /* Delete thumbnails and refresh image metadata cache */
 370                         $this->img->purgeCache();
 371
 372
 373                         $deleted = $image;
 374                 }
 375
 376                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 377                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 378
 379                 $sk = $wgUser->getSkin();
 380                 $loglink = $sk->makeKnownLinkObj(
 381                         Title::makeTitle( NS_SPECIAL, 'Log/delete' ),
 382                         wfMsg( 'deletionlog' ) );
 383
 384                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
 385
 386                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
 387                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedText() );
 388         }
 389
 390         function doDeleteOldImage( $oldimage )
 391         {
 392                 global $wgOut;
 393
 394                 $name = substr( $oldimage, 15 );
 395                 $archive = wfImageArchiveDir( $name );
 396
 397                 # Delete the image if it exists. Sometimes the file will be missing
 398                 # due to manual intervention or weird sync problems; treat that
 399                 # condition gracefully and continue to delete the database entry.
 400                 # Also some records may end up with an empty oi_archive_name field
 401                 # if the original file was missing when a new upload was made;
 402                 # don't try to delete the directory then!
 403                 #
 404                 $targetFile = "{$archive}/{$oldimage}";
 405                 if( $oldimage != '' && file_exists( $targetFile ) && !@unlink( $targetFile ) ) {
 406                         # If we actually have a file and can't delete it, throw an error.
 407                         $wgOut->fileDeleteError( "{$archive}/{$oldimage}" );
 408                 } else {
 409                         # Log the deletion
 410                         $log = new LogPage( 'delete' );
 411                         $log->addEntry( 'delete', $this->mTitle, wfMsg('deletedrevision',$oldimage) );
 412                 }
 413         }
 414
 415         function revert()
 416         {
 417                 global $wgOut, $wgRequest, $wgUser;
 418                 global $wgUseSquid, $wgInternalServer, $wgDeferredUpdateList;
 419
 420                 $oldimage = $wgRequest->getText( 'oldimage' );
 421                 if ( strlen( $oldimage ) < 16 ) {
 422                         $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 423                         return;
 424                 }
 425                 if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 426                         $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 427                         return;
 428                 }
 429
 430                 if ( wfReadOnly() ) {
 431                         $wgOut->readOnlyPage();
 432                         return;
 433                 }
 434                 if( $wgUser->isAnon() ) {
 435                         $wgOut->errorpage( 'uploadnologin', 'uploadnologintext' );
 436                         return;
 437                 }
 438                 if ( ! $this->mTitle->userCanEdit() ) {
 439                         $wgOut->sysopRequired();
 440                         return;
 441                 }
 442                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 443                         $wgOut->errorpage( 'internalerror', 'sessionfailure' );
 444                         return;
 445                 }
 446                 $name = substr( $oldimage, 15 );
 447
 448                 $dest = wfImageDir( $name );
 449                 $archive = wfImageArchiveDir( $name );
 450                 $curfile = "{$dest}/{$name}";
 451
 452                 if ( ! is_file( $curfile ) ) {
 453                         $wgOut->fileNotFoundError( htmlspecialchars( $curfile ) );
 454                         return;
 455                 }
 456                 $oldver = wfTimestampNow() . "!{$name}";
 457
 458                 $dbr =& wfGetDB( DB_SLAVE );
 459                 $size = $dbr->selectField( 'oldimage', 'oi_size', array( 'oi_archive_name' => $oldimage )  );
 460
 461                 if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
 462                         $wgOut->fileRenameError( $curfile, "${archive}/{$oldver}" );
 463                         return;
 464                 }
 465                 if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
 466                         $wgOut->fileCopyError( "${archive}/{$oldimage}", $curfile );
 467                 }
 468
 469                 # Record upload and update metadata cache
 470                 $img = Image::newFromName( $name );
 471                 $img->recordUpload( $oldver, wfMsg( "reverted" ) );
 472
 473                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 474                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 475                 $wgOut->addHTML( wfMsg( 'imagereverted' ) );
 476
 477                 $descTitle = $img->getTitle();
 478                 $wgOut->returnToMain( false, $descTitle->getPrefixedText() );
 479         }
 480 }
 481
 482 /**
 483  * @todo document
 484  * @package MediaWiki
 485  */
 486 class ImageHistoryList {
 487         function ImageHistoryList( &$skin ) {
 488                 $this->skin =& $skin;
 489         }
 490
 491         function beginImageHistoryList() {
 492                 $s = "\n<h2>" . wfMsg( 'imghistory' ) . "</h2>\n" .
 493                   "<p>" . wfMsg( 'imghistlegend' ) . "</p>\n".'<ul class="special">';
 494                 return $s;
 495         }
 496
 497         function endImageHistoryList() {
 498                 $s = "</ul>\n";
 499                 return $s;
 500         }
 501
 502         function imageHistoryLine( $iscur, $timestamp, $img, $user, $usertext, $size, $description ) {
 503                 global $wgUser, $wgLang, $wgContLang, $wgTitle;
 504
 505                 $datetime = $wgLang->timeanddate( $timestamp, true );
 506                 $del = wfMsg( 'deleteimg' );
 507                 $delall = wfMsg( 'deleteimgcompletely' );
 508                 $cur = wfMsg( 'cur' );
 509
 510                 if ( $iscur ) {
 511                         $url = Image::imageUrl( $img );
 512                         $rlink = $cur;
 513                         if ( $wgUser->isAllowed('delete') ) {
 514                                 $link = $wgTitle->escapeLocalURL( 'image=' . $wgTitle->getPartialURL() .
 515                                   '&action=delete' );
 516                                 $style = $this->skin->getInternalLinkAttributes( $link, $delall );
 517
 518                                 $dlink = '<a href="'.$link.'"'.$style.'>'.$delall.'</a>';
 519                         } else {
 520                                 $dlink = $del;
 521                         }
 522                 } else {
 523                         $url = htmlspecialchars( wfImageArchiveUrl( $img ) );
 524                         if( $wgUser->getID() != 0 && $wgTitle->userCanEdit() ) {
 525                                 $token = urlencode( $wgUser->editToken( $img ) );
 526                                 $rlink = $this->skin->makeKnownLinkObj( $wgTitle,
 527                                            wfMsg( 'revertimg' ), 'action=revert&oldimage=' .
 528                                            urlencode( $img ) . "&wpEditToken=$token" );
 529                                 $dlink = $this->skin->makeKnownLinkObj( $wgTitle,
 530                                            $del, 'action=delete&oldimage=' . urlencode( $img ) .
 531                                            "&wpEditToken=$token" );
 532                         } else {
 533                                 # Having live active links for non-logged in users
 534                                 # means that bots and spiders crawling our site can
 535                                 # inadvertently change content. Baaaad idea.
 536                                 $rlink = wfMsg( 'revertimg' );
 537                                 $dlink = $del;
 538                         }
 539                 }
 540                 if ( 0 == $user ) {
 541                         $userlink = $usertext;
 542                 } else {
 543                         $userlink = $this->skin->makeLinkObj(
 544                                 Title::makeTitle( NS_USER, $usertext ),
 545                                 $usertext );
 546                 }
 547                 $nbytes = wfMsg( 'nbytes', $size );
 548                 $style = $this->skin->getInternalLinkAttributes( $url, $datetime );
 549
 550                 $s = "<li> ({$dlink}) ({$rlink}) <a href=\"{$url}\"{$style}>{$datetime}</a>"
 551                   . " . . {$userlink} ({$nbytes})";
 552
 553                 $s .= $this->skin->commentBlock( $description, $wgTitle );
 554                 $s .= "</li>\n";
 555                 return $s;
 556         }
 557
 558 }
 559
 560
 561 ?>