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 if ( $wgShowEXIF ) {
  15         require_once ( 'exifReader.inc' ) ;
  16         }
  17
  18 /**
  19  * Special handling for image description pages
  20  * @package MediaWiki
  21  */
  22 class ImagePage extends Article {
  23
  24         /* private */ var $img;  // Image object this page is shown for
  25
  26         function view() {
  27                 global $wgUseExternalEditor, $wgOut ;
  28
  29                 $this->img  = new Image( $this->mTitle );
  30
  31                 if( $this->mTitle->getNamespace() == NS_IMAGE  ) {
  32                         if ( $this->img->exists() ) $this->showEXIFdata();
  33                         $this->openShowImage();
  34
  35                         # No need to display noarticletext, we use our own message, output in openShowImage()
  36                         if ( $this->getID() ) {
  37                                 Article::view();
  38                         } else {
  39                                 # Just need to set the right headers
  40                                 $wgOut->setArticleFlag( true );
  41                                 $wgOut->setRobotpolicy( 'index,follow' );
  42                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  43                                 $wgOut->addMetaTags();
  44                                 $this->viewUpdates();
  45                         }
  46
  47                         if ( $this->img->exists() ) {
  48                                 $this->uploadNewVersionLink();
  49                                 if ( $wgUseExternalEditor && $this->img->exists() ) {
  50                                         $this->externalEditorLink();
  51                                 }
  52                         }
  53                         $this->closeShowImage();
  54                         $this->imageHistory();
  55                         $this->imageLinks();
  56                 } else {
  57                         Article::view();
  58                 }
  59         }
  60
  61         function showEXIFdata()
  62                 {
  63                 global $wgOut , $wgShowEXIF ;
  64                 if ( ! $wgShowEXIF ) return ;
  65                 $file = $this->img->getImagePath () ;
  66                 $per = new phpExifReader ( $file ) ;
  67                 $per->processFile () ;
  68
  69                 $r = "<table border='1' cellspacing='0' cellpadding='0' align='right'>" ;
  70                 $r .= "<caption>EXIF data</caption>" ;
  71                 $a = $per->getImageInfo() ;
  72                 if ( count ( $a ) == 0 ) return ; # No EXIF data
  73                 unset ( $a["FileName"] ) ;
  74                 unset ( $a["Thumbnail"] ) ;
  75                 foreach ( $a AS $k => $v ) {
  76                         $r .= "<tr>" ;
  77                         $v = str_replace ( "\0" , "" , $v ) ;
  78                         $r .= "<th><small>" . htmlspecialchars ( $k ) . "</small></th>" ;
  79                         $r .= "<td><small>" . htmlspecialchars ( $v ) . "</small></td>" ;
  80                         $r .= "</tr>" ;
  81                         }
  82                 $r .= "</table>" ;
  83                 $wgOut->addHTML ( $r ) ;
  84                 }
  85
  86         function openShowImage()
  87         {
  88                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
  89                        $wgUseImageResize, $wgRepositoryBaseUrl,
  90                        $wgUseExternalEditor, $wgServer;
  91                 $full_url  = $this->img->getViewURL();
  92                 $anchoropen = '';
  93                 $anchorclose = '';
  94
  95                 if( $wgUser->getOption( 'imagesize' ) == '' ) {
  96                         $sizeSel = User::getDefaultOption( 'imagesize' );
  97                 } else {
  98                         $sizeSel = IntVal( $wgUser->getOption( 'imagesize' ) );
  99                 }
 100                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 101                         $sizeSel = User::getDefaultOption( 'imagesize' );
 102                 }
 103                 $max = $wgImageLimits[$sizeSel];
 104                 $maxWidth = $max[0];
 105                 $maxHeight = $max[1];
 106                 $sk = $wgUser->getSkin();
 107
 108                 if ( $this->img->exists() ) {
 109                         if ( $this->img->getType() != '' ) {
 110                                 # image
 111                                 $width = $this->img->getWidth();
 112                                 $height = $this->img->getHeight();
 113                                 $msg = wfMsg('showbigimage', $width, $height, intval( $this->img->getSize()/1024 ) );
 114                                 if ( $width > $maxWidth ) {
 115                                         $height = floor( $height * $maxWidth / $width );
 116                                         $width  = $maxWidth;
 117                                 }
 118                                 if ( $height > $maxHeight ) {
 119                                         $width = floor( $width * $maxHeight / $height );
 120                                         $height = $maxHeight;
 121                                 }
 122                                 if ( $width != $this->img->getWidth() || $height != $this->img->getHeight() ) {
 123                                         if( $wgUseImageResize ) {
 124                                                 $thumbnail = $this->img->getThumbnail( $width );
 125                                                 $url = $thumbnail->getUrl();
 126                                         } else {
 127                                                 # No resize ability? Show the full image, but scale
 128                                                 # it down in the browser so it fits on the page.
 129                                                 $url = $full_url;
 130                                         }
 131                                         $anchoropen  = "<a href=\"{$full_url}\">";
 132                                         $anchorclose = "</a><br />\n$anchoropen{$msg}</a>";
 133                                 } else {
 134                                         $url = $full_url;
 135                                 }
 136                                 $s = '<div class="fullImageLink">' . $anchoropen .
 137                                      "<img border=\"0\" src=\"{$url}\" width=\"{$width}\" height=\"{$height}\" alt=\"" .
 138                                      htmlspecialchars( $wgRequest->getVal( 'image' ) ).'" />' . $anchorclose . '</div>';
 139                         } else {
 140                                 $s = "<div class=\"fullMedia\">" . $sk->makeMediaLink( $this->img->getName(),'' ) . '</div>';
 141                         }
 142                         $wgOut->addHTML( $s );
 143                         if($this->img->fromSharedDirectory) {
 144                                 $sharedtext="<div class=\"sharedUploadNotice\">" . wfMsg("sharedupload");
 145                                 if($wgRepositoryBaseUrl) {
 146                                         $sharedtext .= " ". wfMsg("shareduploadwiki",$wgRepositoryBaseUrl . urlencode($this->mTitle->getDBkey()));
 147                                 }
 148                                 $sharedtext.="</div>";
 149                                 $wgOut->addWikiText($sharedtext);
 150                         }
 151
 152                 } else {
 153                         # Image does not exist
 154                         $wgOut->addWikiText( wfMsg( 'noimage', $this->getUploadUrl() ) );
 155                 }
 156         }
 157
 158         function getUploadUrl() {
 159                 global $wgServer;
 160                 $uploadTitle = Title::makeTitle( NS_SPECIAL, 'Upload' );
 161                 return $wgServer . $uploadTitle->getLocalUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 162         }
 163
 164
 165         function uploadNewVersionLink() {
 166                 global $wgOut;
 167                 $wgOut->addWikiText( wfMsg( 'uploadnewversion', $this->getUploadUrl() ) );
 168         }
 169
 170         function externalEditorLink()
 171         {
 172                 global $wgUser,$wgOut;
 173                 $sk = $wgUser->getSkin();
 174                 $wgOut->addHTML( '<div class="editExternally">' );
 175                 $wgOut->addHTML( $sk->makeKnownLinkObj( $this->mTitle,
 176                         wfMsg( 'edit-externally' ),
 177                         "action=edit&externaledit=true&mode=file" ) );
 178                 $wgOut->addWikiText( '<div class="editExternallyHelp">' .
 179                         wfMsg('edit-externally-help') . '</div>' );
 180                 $wgOut->addHTML( '</div><br clear="both" />' );
 181         }
 182
 183         function closeShowImage()
 184         {
 185                 # For overloading
 186
 187         }
 188
 189         /**
 190          * If the page we've just displayed is in the "Image" namespace,
 191          * we follow it with an upload history of the image and its usage.
 192          */
 193         function imageHistory()
 194         {
 195                 global $wgUser, $wgOut;
 196
 197                 $sk = $wgUser->getSkin();
 198
 199                 $line = $this->img->nextHistoryLine();
 200
 201                 if ( $line ) {
 202                         $list =& new ImageHistoryList( $sk );
 203                         $s = $list->beginImageHistoryList() .
 204                                 $list->imageHistoryLine( true, $line->img_timestamp,
 205                                         $this->mTitle->getDBkey(),  $line->img_user,
 206                                         $line->img_user_text, $line->img_size, $line->img_description );
 207
 208                         while ( $line = $this->img->nextHistoryLine() ) {
 209                                 $s .= $list->imageHistoryLine( false, $line->img_timestamp,
 210                                 $line->oi_archive_name, $line->img_user,
 211                                 $line->img_user_text, $line->img_size, $line->img_description );
 212                         }
 213                         $s .= $list->endImageHistoryList();
 214                 } else { $s=''; }
 215                 $wgOut->addHTML( $s );
 216         }
 217
 218         function imageLinks()
 219         {
 220                 global $wgUser, $wgOut;
 221
 222                 $wgOut->addHTML( '<h2>' . wfMsg( 'imagelinks' ) . "</h2>\n" );
 223
 224                 $dbr =& wfGetDB( DB_SLAVE );
 225                 $page = $dbr->tableName( 'page' );
 226                 $imagelinks = $dbr->tableName( 'imagelinks' );
 227
 228                 $sql = "SELECT page_namespace,page_title FROM $imagelinks,$page WHERE il_to=" .
 229                   $dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=page_id"
 230                   . " LIMIT 500"; # quickie emergency brake
 231                 $res = $dbr->query( $sql, "ImagePage::imageLinks" );
 232
 233                 if ( 0 == $dbr->numRows( $res ) ) {
 234                         $wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
 235                         return;
 236                 }
 237                 $wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) .  "</p>\n<ul>" );
 238
 239                 $sk = $wgUser->getSkin();
 240                 while ( $s = $dbr->fetchObject( $res ) ) {
 241                         $name = Title::MakeTitle( $s->page_namespace, $s->page_title );
 242                         $link = $sk->makeKnownLinkObj( $name, "" );
 243                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 244                 }
 245                 $wgOut->addHTML( "</ul>\n" );
 246         }
 247
 248         function delete()
 249         {
 250                 global $wgUser, $wgOut, $wgRequest;
 251
 252                 $confirm = $wgRequest->getBool( 'wpConfirmB' );
 253                 $image = $wgRequest->getVal( 'image' );
 254                 $oldimage = $wgRequest->getVal( 'oldimage' );
 255
 256                 # Only sysops can delete images. Previously ordinary users could delete
 257                 # old revisions, but this is no longer the case.
 258                 if ( !$wgUser->isAllowed('delete') ) {
 259                         $wgOut->sysopRequired();
 260                         return;
 261                 }
 262                 if ( wfReadOnly() ) {
 263                         $wgOut->readOnlyPage();
 264                         return;
 265                 }
 266
 267                 # Better double-check that it hasn't been deleted yet!
 268                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
 269                 if ( ( !is_null( $image ) )
 270                   && ( '' == trim( $image ) ) ) {
 271                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
 272                         return;
 273                 }
 274
 275                 $this->img  = new Image( $this->mTitle );
 276
 277                 # Deleting old images doesn't require confirmation
 278                 if ( !is_null( $oldimage ) || $confirm ) {
 279                         if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 280                                 $this->doDelete();
 281                         } else {
 282                                 $wgOut->fatalError( wfMsg( 'sessionfailure' ) );
 283                         }
 284                         return;
 285                 }
 286
 287                 if ( !is_null( $image ) ) {
 288                         $q = '&image=' . urlencode( $image );
 289                 } else if ( !is_null( $oldimage ) ) {
 290                         $q = '&oldimage=' . urlencode( $oldimage );
 291                 } else {
 292                         $q = '';
 293                 }
 294                 return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
 295         }
 296
 297         function doDelete()
 298         {
 299                 global $wgOut, $wgUser, $wgContLang, $wgRequest;
 300                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList;
 301                 $fname = 'ImagePage::doDelete';
 302
 303                 $reason = $wgRequest->getVal( 'wpReason' );
 304                 $oldimage = $wgRequest->getVal( 'oldimage' );
 305
 306                 $dbw =& wfGetDB( DB_MASTER );
 307
 308                 if ( !is_null( $oldimage ) ) {
 309                         if ( strlen( $oldimage ) < 16 ) {
 310                                 $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 311                                 return;
 312                         }
 313                         if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 314                                 $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 315                                 return;
 316                         }
 317
 318                         # Invalidate description page cache
 319                         $this->mTitle->invalidateCache();
 320
 321                         # Squid purging
 322                         if ( $wgUseSquid ) {
 323                                 $urlArr = Array(
 324                                         $wgInternalServer.wfImageArchiveUrl( $oldimage ),
 325                                         $wgInternalServer.$this->mTitle->getFullURL()
 326                                 );
 327                                 wfPurgeSquidServers($urlArr);
 328                         }
 329                         $this->doDeleteOldImage( $oldimage );
 330                         $dbw->delete( 'oldimage', array( 'oi_archive_name' => $oldimage ) );
 331                         $deleted = $oldimage;
 332                 } else {
 333                         $image = $this->mTitle->getDBkey();
 334                         $dest = wfImageDir( $image );
 335                         $archive = wfImageDir( $image );
 336
 337                         # Delete the image file if it exists; due to sync problems
 338                         # or manual trimming sometimes the file will be missing.
 339                         $targetFile = "{$dest}/{$image}";
 340                         if( file_exists( $targetFile ) && ! @unlink( $targetFile ) ) {
 341                                 # If the deletion operation actually failed, bug out:
 342                                 $wgOut->fileDeleteError( $targetFile );
 343                                 return;
 344                         }
 345                         $dbw->delete( 'image', array( 'img_name' => $image ) );
 346                         $res = $dbw->select( 'oldimage', array( 'oi_archive_name' ), array( 'oi_name' => $image ) );
 347
 348                         # Purge archive URLs from the squid
 349                         $urlArr = Array();
 350                         while ( $s = $dbw->fetchObject( $res ) ) {
 351                                 $this->doDeleteOldImage( $s->oi_archive_name );
 352                                 $urlArr[] = $wgInternalServer.wfImageArchiveUrl( $s->oi_archive_name );
 353                         }
 354
 355                         # And also the HTML of all pages using this image
 356                         $linksTo = $this->img->getLinksTo();
 357                         if ( $wgUseSquid ) {
 358                                 $u = SquidUpdate::newFromTitles( $linksTo, $urlArr );
 359                                 array_push( $wgPostCommitUpdateList, $u );
 360                         }
 361
 362                         $dbw->delete( 'oldimage', array( 'oi_name' => $image ) );
 363
 364                         # Image itself is now gone, and database is cleaned.
 365                         # Now we remove the image description page.
 366
 367                         $article = new Article( $this->mTitle );
 368                         $article->doDeleteArticle( $reason ); # ignore errors
 369
 370                         # Invalidate parser cache and client cache for pages using this image
 371                         # This is left until relatively late to reduce lock time
 372                         Title::touchArray( $linksTo );
 373
 374                         /* Delete thumbnails and refresh image metadata cache */
 375                         $this->img->purgeCache();
 376
 377
 378                         $deleted = $image;
 379                 }
 380
 381                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 382                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 383
 384                 $sk = $wgUser->getSkin();
 385                 $loglink = $sk->makeKnownLinkObj(
 386                         Title::makeTitle( NS_SPECIAL, 'Log/delete' ),
 387                         wfMsg( 'deletionlog' ) );
 388
 389                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
 390
 391                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
 392                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedText() );
 393         }
 394
 395         function doDeleteOldImage( $oldimage )
 396         {
 397                 global $wgOut;
 398
 399                 $name = substr( $oldimage, 15 );
 400                 $archive = wfImageArchiveDir( $name );
 401
 402                 # Delete the image if it exists. Sometimes the file will be missing
 403                 # due to manual intervention or weird sync problems; treat that
 404                 # condition gracefully and continue to delete the database entry.
 405                 # Also some records may end up with an empty oi_archive_name field
 406                 # if the original file was missing when a new upload was made;
 407                 # don't try to delete the directory then!
 408                 #
 409                 $targetFile = "{$archive}/{$oldimage}";
 410                 if( $oldimage != '' && file_exists( $targetFile ) && !@unlink( $targetFile ) ) {
 411                         # If we actually have a file and can't delete it, throw an error.
 412                         $wgOut->fileDeleteError( "{$archive}/{$oldimage}" );
 413                 } else {
 414                         # Log the deletion
 415                         $log = new LogPage( 'delete' );
 416                         $log->addEntry( 'delete', $this->mTitle, wfMsg('deletedrevision',$oldimage) );
 417                 }
 418         }
 419
 420         function revert()
 421         {
 422                 global $wgOut, $wgRequest, $wgUser;
 423                 global $wgUseSquid, $wgInternalServer, $wgDeferredUpdateList;
 424
 425                 $oldimage = $wgRequest->getText( 'oldimage' );
 426                 if ( strlen( $oldimage ) < 16 ) {
 427                         $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 428                         return;
 429                 }
 430                 if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 431                         $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 432                         return;
 433                 }
 434
 435                 if ( wfReadOnly() ) {
 436                         $wgOut->readOnlyPage();
 437                         return;
 438                 }
 439                 if( $wgUser->isAnon() ) {
 440                         $wgOut->errorpage( 'uploadnologin', 'uploadnologintext' );
 441                         return;
 442                 }
 443                 if ( ! $this->mTitle->userCanEdit() ) {
 444                         $wgOut->sysopRequired();
 445                         return;
 446                 }
 447                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 448                         $wgOut->errorpage( 'internalerror', 'sessionfailure' );
 449                         return;
 450                 }
 451                 $name = substr( $oldimage, 15 );
 452
 453                 $dest = wfImageDir( $name );
 454                 $archive = wfImageArchiveDir( $name );
 455                 $curfile = "{$dest}/{$name}";
 456
 457                 if ( ! is_file( $curfile ) ) {
 458                         $wgOut->fileNotFoundError( htmlspecialchars( $curfile ) );
 459                         return;
 460                 }
 461                 $oldver = wfTimestampNow() . "!{$name}";
 462
 463                 $dbr =& wfGetDB( DB_SLAVE );
 464                 $size = $dbr->selectField( 'oldimage', 'oi_size', array( 'oi_archive_name' => $oldimage )  );
 465
 466                 if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
 467                         $wgOut->fileRenameError( $curfile, "${archive}/{$oldver}" );
 468                         return;
 469                 }
 470                 if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
 471                         $wgOut->fileCopyError( "${archive}/{$oldimage}", $curfile );
 472                 }
 473
 474                 # Record upload and update metadata cache
 475                 $img = Image::newFromName( $name );
 476                 $img->recordUpload( $oldver, wfMsg( "reverted" ) );
 477
 478                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 479                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 480                 $wgOut->addHTML( wfMsg( 'imagereverted' ) );
 481
 482                 $descTitle = $img->getTitle();
 483                 $wgOut->returnToMain( false, $descTitle->getPrefixedText() );
 484         }
 485 }
 486
 487 /**
 488  * @todo document
 489  * @package MediaWiki
 490  */
 491 class ImageHistoryList {
 492         function ImageHistoryList( &$skin ) {
 493                 $this->skin =& $skin;
 494         }
 495
 496         function beginImageHistoryList() {
 497                 $s = "\n<h2>" . wfMsg( 'imghistory' ) . "</h2>\n" .
 498                   "<p>" . wfMsg( 'imghistlegend' ) . "</p>\n".'<ul class="special">';
 499                 return $s;
 500         }
 501
 502         function endImageHistoryList() {
 503                 $s = "</ul>\n";
 504                 return $s;
 505         }
 506
 507         function imageHistoryLine( $iscur, $timestamp, $img, $user, $usertext, $size, $description ) {
 508                 global $wgUser, $wgLang, $wgContLang, $wgTitle;
 509
 510                 $datetime = $wgLang->timeanddate( $timestamp, true );
 511                 $del = wfMsg( 'deleteimg' );
 512                 $delall = wfMsg( 'deleteimgcompletely' );
 513                 $cur = wfMsg( 'cur' );
 514
 515                 if ( $iscur ) {
 516                         $url = Image::imageUrl( $img );
 517                         $rlink = $cur;
 518                         if ( $wgUser->isAllowed('delete') ) {
 519                                 $link = $wgTitle->escapeLocalURL( 'image=' . $wgTitle->getPartialURL() .
 520                                   '&action=delete' );
 521                                 $style = $this->skin->getInternalLinkAttributes( $link, $delall );
 522
 523                                 $dlink = '<a href="'.$link.'"'.$style.'>'.$delall.'</a>';
 524                         } else {
 525                                 $dlink = $del;
 526                         }
 527                 } else {
 528                         $url = htmlspecialchars( wfImageArchiveUrl( $img ) );
 529                         if( $wgUser->getID() != 0 && $wgTitle->userCanEdit() ) {
 530                                 $token = urlencode( $wgUser->editToken( $img ) );
 531                                 $rlink = $this->skin->makeKnownLinkObj( $wgTitle,
 532                                            wfMsg( 'revertimg' ), 'action=revert&oldimage=' .
 533                                            urlencode( $img ) . "&wpEditToken=$token" );
 534                                 $dlink = $this->skin->makeKnownLinkObj( $wgTitle,
 535                                            $del, 'action=delete&oldimage=' . urlencode( $img ) .
 536                                            "&wpEditToken=$token" );
 537                         } else {
 538                                 # Having live active links for non-logged in users
 539                                 # means that bots and spiders crawling our site can
 540                                 # inadvertently change content. Baaaad idea.
 541                                 $rlink = wfMsg( 'revertimg' );
 542                                 $dlink = $del;
 543                         }
 544                 }
 545                 if ( 0 == $user ) {
 546                         $userlink = $usertext;
 547                 } else {
 548                         $userlink = $this->skin->makeLinkObj(
 549                                 Title::makeTitle( NS_USER, $usertext ),
 550                                 $usertext );
 551                 }
 552                 $nbytes = wfMsg( 'nbytes', $size );
 553                 $style = $this->skin->getInternalLinkAttributes( $url, $datetime );
 554
 555                 $s = "<li> ({$dlink}) ({$rlink}) <a href=\"{$url}\"{$style}>{$datetime}</a>"
 556                   . " . . {$userlink} ({$nbytes})";
 557
 558                 $s .= $this->skin->commentBlock( $description, $wgTitle );
 559                 $s .= "</li>\n";
 560                 return $s;
 561         }
 562
 563 }
 564
 565
 566 ?>