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