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
  30                         # No need to display noarticletext, we use our own message, output in openShowImage()
  31                         if ( $this->getID() ) {
  32                                 Article::view();
  33                         } else {
  34                                 # Just need to set the right headers
  35                                 $wgOut->setArticleFlag( true );
  36                                 $wgOut->setRobotpolicy( 'index,follow' );
  37                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  38                                 $wgOut->addMetaTags();
  39                                 $this->viewUpdates();
  40                         }
  41
  42                         if ( $this->img->exists() ) {
  43                                 $this->uploadNewVersionLink();
  44                                 if ( $wgUseExternalEditor && $this->img->exists() ) {
  45                                         $this->externalEditorLink();
  46                                 }
  47                         }
  48                         $this->closeShowImage();
  49                         $this->imageHistory();
  50                         $this->imageLinks();
  51                 } else {
  52                         Article::view();
  53                 }
  54         }
  55
  56         function openShowImage()
  57         {
  58                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
  59                        $wgUseImageResize, $wgRepositoryBaseUrl,
  60                        $wgUseExternalEditor, $wgServer;
  61                 $full_url  = $this->img->getViewURL();
  62                 $anchoropen = '';
  63                 $anchorclose = '';
  64
  65                 if( $wgUser->getOption( 'imagesize' ) == '' ) {
  66                         $sizeSel = User::getDefaultOption( 'imagesize' );
  67                 } else {
  68                         $sizeSel = IntVal( $wgUser->getOption( 'imagesize' ) );
  69                 }
  70                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
  71                         $sizeSel = User::getDefaultOption( 'imagesize' );
  72                 }
  73                 $max = $wgImageLimits[$sizeSel];
  74                 $maxWidth = $max[0];
  75                 $maxHeight = $max[1];
  76                 $sk = $wgUser->getSkin();
  77
  78                 if ( $this->img->exists() ) {
  79                         if ( $this->img->getType() != '' ) {
  80                                 # image
  81                                 $width = $this->img->getWidth();
  82                                 $height = $this->img->getHeight();
  83                                 $msg = wfMsg('showbigimage', $width, $height, intval( $this->img->getSize()/1024 ) );
  84                                 if ( $width > $maxWidth ) {
  85                                         $height = floor( $height * $maxWidth / $width );
  86                                         $width  = $maxWidth;
  87                                 }
  88                                 if ( $height > $maxHeight ) {
  89                                         $width = floor( $width * $maxHeight / $height );
  90                                         $height = $maxHeight;
  91                                 }
  92                                 if ( $width != $this->img->getWidth() || $height != $this->img->getHeight() ) {
  93                                         if( $wgUseImageResize ) {
  94                                                 $thumbnail = $this->img->getThumbnail( $width );
  95                                                 $url = $thumbnail->getUrl();
  96                                         } else {
  97                                                 # No resize ability? Show the full image, but scale
  98                                                 # it down in the browser so it fits on the page.
  99                                                 $url = $full_url;
 100                                         }
 101                                         $anchoropen  = "<a href=\"{$full_url}\">";
 102                                         $anchorclose = "</a><br />\n$anchoropen{$msg}</a>";
 103                                 } else {
 104                                         $url = $full_url;
 105                                 }
 106                                 $s = '<div class="fullImageLink">' . $anchoropen .
 107                                      "<img border=\"0\" src=\"{$url}\" width=\"{$width}\" height=\"{$height}\" alt=\"" .
 108                                      htmlspecialchars( $wgRequest->getVal( 'image' ) ).'" />' . $anchorclose . '</div>';
 109                         } else {
 110                                 $s = "<div class=\"fullMedia\">" . $sk->makeMediaLink( $this->img->getName(),'' ) . '</div>';
 111                         }
 112                         $wgOut->addHTML( $s );
 113                         if($this->img->fromSharedDirectory) {
 114                                 $sharedtext="<div class=\"sharedUploadNotice\">" . wfMsg("sharedupload");
 115                                 if($wgRepositoryBaseUrl) {
 116                                         $sharedtext .= " ". wfMsg("shareduploadwiki",$wgRepositoryBaseUrl . urlencode($this->mTitle->getDBkey()));
 117                                 }
 118                                 $sharedtext.="</div>";
 119                                 $wgOut->addWikiText($sharedtext);
 120                         }
 121
 122                 } else {
 123                         # Image does not exist
 124                         $wgOut->addWikiText( wfMsg( 'noimage', $this->getUploadUrl() ) );
 125                 }
 126         }
 127
 128         function getUploadUrl() {
 129                 global $wgServer;
 130                 $uploadTitle = Title::makeTitle( NS_SPECIAL, 'Upload' );
 131                 return $wgServer . $uploadTitle->getLocalUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 132         }
 133
 134
 135         function uploadNewVersionLink() {
 136                 global $wgOut;
 137                 $wgOut->addWikiText( wfMsg( 'uploadnewversion', $this->getUploadUrl() ) );
 138         }
 139
 140         function externalEditorLink()
 141         {
 142                 global $wgUser,$wgOut;
 143                 $sk = $wgUser->getSkin();
 144                 $wgOut->addHTML( '<div class="editExternally">' );
 145                 $wgOut->addHTML( $sk->makeKnownLinkObj( $this->mTitle,
 146                         wfMsg( 'edit-externally' ),
 147                         "action=edit&externaledit=true&mode=file" ) );
 148                 $wgOut->addWikiText( '<div class="editExternallyHelp">' .
 149                         wfMsg('edit-externally-help') . '</div>' );
 150                 $wgOut->addHTML( '</div><br clear="all" />' );
 151         }
 152
 153         function closeShowImage()
 154         {
 155                 # For overloading
 156
 157         }
 158
 159         /**
 160          * If the page we've just displayed is in the "Image" namespace,
 161          * we follow it with an upload history of the image and its usage.
 162          */
 163         function imageHistory()
 164         {
 165                 global $wgUser, $wgOut;
 166
 167                 $sk = $wgUser->getSkin();
 168
 169                 $line = $this->img->nextHistoryLine();
 170
 171                 if ( $line ) {
 172                         $list =& new ImageHistoryList( $sk );
 173                         $s = $list->beginImageHistoryList() .
 174                                 $list->imageHistoryLine( true, $line->img_timestamp,
 175                                         $this->mTitle->getDBkey(),  $line->img_user,
 176                                         $line->img_user_text, $line->img_size, $line->img_description );
 177
 178                         while ( $line = $this->img->nextHistoryLine() ) {
 179                                 $s .= $list->imageHistoryLine( false, $line->img_timestamp,
 180                                 $line->oi_archive_name, $line->img_user,
 181                                 $line->img_user_text, $line->img_size, $line->img_description );
 182                         }
 183                         $s .= $list->endImageHistoryList();
 184                 } else { $s=''; }
 185                 $wgOut->addHTML( $s );
 186         }
 187
 188         function imageLinks()
 189         {
 190                 global $wgUser, $wgOut;
 191
 192                 $wgOut->addHTML( '<h2>' . wfMsg( 'imagelinks' ) . "</h2>\n" );
 193
 194                 $dbr =& wfGetDB( DB_SLAVE );
 195                 $page = $dbr->tableName( 'page' );
 196                 $imagelinks = $dbr->tableName( 'imagelinks' );
 197
 198                 $sql = "SELECT page_namespace,page_title FROM $imagelinks,$page WHERE il_to=" .
 199                   $dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=page_id"
 200                   . " LIMIT 500"; # quickie emergency brake
 201                 $res = $dbr->query( $sql, "ImagePage::imageLinks" );
 202
 203                 if ( 0 == $dbr->numRows( $res ) ) {
 204                         $wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
 205                         return;
 206                 }
 207                 $wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) .  "</p>\n<ul>" );
 208
 209                 $sk = $wgUser->getSkin();
 210                 while ( $s = $dbr->fetchObject( $res ) ) {
 211                         $name = Title::MakeTitle( $s->page_namespace, $s->page_title );
 212                         $link = $sk->makeKnownLinkObj( $name, "" );
 213                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 214                 }
 215                 $wgOut->addHTML( "</ul>\n" );
 216         }
 217
 218         function delete()
 219         {
 220                 global $wgUser, $wgOut, $wgRequest;
 221
 222                 $confirm = $wgRequest->getBool( 'wpConfirmB' );
 223                 $image = $wgRequest->getVal( 'image' );
 224                 $oldimage = $wgRequest->getVal( 'oldimage' );
 225
 226                 # Only sysops can delete images. Previously ordinary users could delete
 227                 # old revisions, but this is no longer the case.
 228                 if ( !$wgUser->isAllowed('delete') ) {
 229                         $wgOut->sysopRequired();
 230                         return;
 231                 }
 232                 if ( wfReadOnly() ) {
 233                         $wgOut->readOnlyPage();
 234                         return;
 235                 }
 236
 237                 # Better double-check that it hasn't been deleted yet!
 238                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
 239                 if ( ( !is_null( $image ) )
 240                   && ( '' == trim( $image ) ) ) {
 241                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
 242                         return;
 243                 }
 244
 245                 $this->img  = new Image( $this->mTitle );
 246
 247                 # Deleting old images doesn't require confirmation
 248                 if ( !is_null( $oldimage ) || $confirm ) {
 249                         if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 250                                 $this->doDelete();
 251                         } else {
 252                                 $wgOut->fatalError( wfMsg( 'sessionfailure' ) );
 253                         }
 254                         return;
 255                 }
 256
 257                 if ( !is_null( $image ) ) {
 258                         $q = '&image=' . urlencode( $image );
 259                 } else if ( !is_null( $oldimage ) ) {
 260                         $q = '&oldimage=' . urlencode( $oldimage );
 261                 } else {
 262                         $q = '';
 263                 }
 264                 return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
 265         }
 266
 267         function doDelete()
 268         {
 269                 global $wgOut, $wgUser, $wgContLang, $wgRequest;
 270                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList;
 271                 $fname = 'ImagePage::doDelete';
 272
 273                 $reason = $wgRequest->getVal( 'wpReason' );
 274                 $oldimage = $wgRequest->getVal( 'oldimage' );
 275
 276                 $dbw =& wfGetDB( DB_MASTER );
 277
 278                 if ( !is_null( $oldimage ) ) {
 279                         if ( strlen( $oldimage ) < 16 ) {
 280                                 $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 281                                 return;
 282                         }
 283                         if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 284                                 $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 285                                 return;
 286                         }
 287
 288                         # Invalidate description page cache
 289                         $this->mTitle->invalidateCache();
 290
 291                         # Squid purging
 292                         if ( $wgUseSquid ) {
 293                                 $urlArr = Array(
 294                                         $wgInternalServer.wfImageArchiveUrl( $oldimage ),
 295                                         $wgInternalServer.$this->mTitle->getFullURL()
 296                                 );
 297                                 wfPurgeSquidServers($urlArr);
 298                         }
 299                         $this->doDeleteOldImage( $oldimage );
 300                         $dbw->delete( 'oldimage', array( 'oi_archive_name' => $oldimage ) );
 301                         $deleted = $oldimage;
 302                 } else {
 303                         $image = $this->mTitle->getDBkey();
 304                         $dest = wfImageDir( $image );
 305                         $archive = wfImageDir( $image );
 306
 307                         # Delete the image file if it exists; due to sync problems
 308                         # or manual trimming sometimes the file will be missing.
 309                         $targetFile = "{$dest}/{$image}";
 310                         if( file_exists( $targetFile ) && ! @unlink( $targetFile ) ) {
 311                                 # If the deletion operation actually failed, bug out:
 312                                 $wgOut->fileDeleteError( $targetFile );
 313                                 return;
 314                         }
 315                         $dbw->delete( 'image', array( 'img_name' => $image ) );
 316                         $res = $dbw->select( 'oldimage', array( 'oi_archive_name' ), array( 'oi_name' => $image ) );
 317
 318                         # Purge archive URLs from the squid
 319                         $urlArr = Array();
 320                         while ( $s = $dbw->fetchObject( $res ) ) {
 321                                 $this->doDeleteOldImage( $s->oi_archive_name );
 322                                 $urlArr[] = $wgInternalServer.wfImageArchiveUrl( $s->oi_archive_name );
 323                         }
 324
 325                         # And also the HTML of all pages using this image
 326                         $linksTo = $this->img->getLinksTo();
 327                         if ( $wgUseSquid ) {
 328                                 $u = SquidUpdate::newFromTitles( $linksTo, $urlArr );
 329                                 array_push( $wgPostCommitUpdateList, $u );
 330                         }
 331
 332                         $dbw->delete( 'oldimage', array( 'oi_name' => $image ) );
 333
 334                         # Image itself is now gone, and database is cleaned.
 335                         # Now we remove the image description page.
 336
 337                         $article = new Article( $this->mTitle );
 338                         $article->doDeleteArticle( $reason ); # ignore errors
 339
 340                         # Invalidate parser cache and client cache for pages using this image
 341                         # This is left until relatively late to reduce lock time
 342                         Title::touchArray( $linksTo );
 343
 344                         /* Delete thumbnails and refresh image metadata cache */
 345                         $this->img->purgeCache();
 346
 347
 348                         $deleted = $image;
 349                 }
 350
 351                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 352                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 353
 354                 $sk = $wgUser->getSkin();
 355                 $loglink = $sk->makeKnownLinkObj(
 356                         Title::makeTitle( NS_SPECIAL, 'Log/delete' ),
 357                         wfMsg( 'deletionlog' ) );
 358
 359                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
 360
 361                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
 362                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedText() );
 363         }
 364
 365         function doDeleteOldImage( $oldimage )
 366         {
 367                 global $wgOut;
 368
 369                 $name = substr( $oldimage, 15 );
 370                 $archive = wfImageArchiveDir( $name );
 371
 372                 # Delete the image if it exists. Sometimes the file will be missing
 373                 # due to manual intervention or weird sync problems; treat that
 374                 # condition gracefully and continue to delete the database entry.
 375                 # Also some records may end up with an empty oi_archive_name field
 376                 # if the original file was missing when a new upload was made;
 377                 # don't try to delete the directory then!
 378                 #
 379                 $targetFile = "{$archive}/{$oldimage}";
 380                 if( $oldimage != '' && file_exists( $targetFile ) && !@unlink( $targetFile ) ) {
 381                         # If we actually have a file and can't delete it, throw an error.
 382                         $wgOut->fileDeleteError( "{$archive}/{$oldimage}" );
 383                 } else {
 384                         # Log the deletion
 385                         $log = new LogPage( 'delete' );
 386                         $log->addEntry( 'delete', $this->mTitle, wfMsg('deletedrevision',$oldimage) );
 387                 }
 388         }
 389
 390         function revert()
 391         {
 392                 global $wgOut, $wgRequest, $wgUser;
 393                 global $wgUseSquid, $wgInternalServer, $wgDeferredUpdateList;
 394
 395                 $oldimage = $wgRequest->getText( 'oldimage' );
 396                 if ( strlen( $oldimage ) < 16 ) {
 397                         $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 398                         return;
 399                 }
 400                 if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 401                         $wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 402                         return;
 403                 }
 404
 405                 if ( wfReadOnly() ) {
 406                         $wgOut->readOnlyPage();
 407                         return;
 408                 }
 409                 if( $wgUser->isAnon() ) {
 410                         $wgOut->errorpage( 'uploadnologin', 'uploadnologintext' );
 411                         return;
 412                 }
 413                 if ( ! $this->mTitle->userCanEdit() ) {
 414                         $wgOut->sysopRequired();
 415                         return;
 416                 }
 417                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 418                         $wgOut->errorpage( 'internalerror', 'sessionfailure' );
 419                         return;
 420                 }
 421                 $name = substr( $oldimage, 15 );
 422
 423                 $dest = wfImageDir( $name );
 424                 $archive = wfImageArchiveDir( $name );
 425                 $curfile = "{$dest}/{$name}";
 426
 427                 if ( ! is_file( $curfile ) ) {
 428                         $wgOut->fileNotFoundError( htmlspecialchars( $curfile ) );
 429                         return;
 430                 }
 431                 $oldver = wfTimestampNow() . "!{$name}";
 432
 433                 $dbr =& wfGetDB( DB_SLAVE );
 434                 $size = $dbr->selectField( 'oldimage', 'oi_size', array( 'oi_archive_name' => $oldimage )  );
 435
 436                 if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
 437                         $wgOut->fileRenameError( $curfile, "${archive}/{$oldver}" );
 438                         return;
 439                 }
 440                 if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
 441                         $wgOut->fileCopyError( "${archive}/{$oldimage}", $curfile );
 442                 }
 443
 444                 # Record upload and update metadata cache
 445                 $img = Image::newFromName( $name );
 446                 $img->recordUpload( $oldver, wfMsg( "reverted" ) );
 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 ?>