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