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