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