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