ImagePage.php

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<?php

/*
        Special handling for image description pages
*/

class ImagePage extends Article {

        /* private */ var $img;  // Image object this page is shown for. Initilaized in openShowImage, not
                                 // available in doDelete etc.

        function view() {
                if ( Namespace::getImage() == $this->mTitle->getNamespace() ) {
                        $this->openShowImage();
                }

                Article::view();
                
                # If the article we've just shown is in the "Image" namespace,
                # follow it with the history list and link list for the image
                # it describes.

                if ( Namespace::getImage() == $this->mTitle->getNamespace() ) {
                        $this->closeShowImage();
                        $this->imageHistory();
                        $this->imageLinks();
                }
        }

        function openShowImage()
        {
                global $wgOut, $wgUser,$wgRequest;
                $this->img  = Image::newFromTitle( $this->mTitle );
                $url  = $this->img->getUrl();

                if ( $this->img->exists() ) {

                        $sk = $wgUser->getSkin();
                        
                        if ( $this->img->getType() != "" ) {
                                # image
                                $s = "<div class=\"fullImage\">" .
                                     "<img src=\"{$url}\" width=\"" . $this->img->getWidth() . "\" height=\"" . $this->img->getHeight() .
                                     "\" alt=\"".$wgRequest->getVal( 'image' )."\" /></div>";
                        } else {
                                $s = "<div class=\"fullMedia\">".$sk->makeMediaLink($this->img->getName(),"")."</div>";
                        }
                        $wgOut->addHTML( $s );
                }
        }
        
        function closeShowImage()
        {
                # For overloading
        }

        # If the page we've just displayed is in the "Image" namespace,
        # we follow it with an upload history of the image and its usage.

        function imageHistory()
        {
                global $wgUser, $wgOut;

                $sk = $wgUser->getSkin();
                $s = $sk->beginImageHistoryList();              

                $line = $this->img->nextHistoryLine();

                $s .= $sk->imageHistoryLine( true, $line->img_timestamp,
                  $this->mTitle->getDBkey(),  $line->img_user,
                  $line->img_user_text, $line->img_size, $line->img_description );

                while ( $line = $this->img->nextHistoryLine() ) {
                        $s .= $sk->imageHistoryLine( false, $line->img_timestamp,
                          $line->oi_archive_name, $line->img_user,
                          $line->img_user_text, $line->img_size, $line->img_description );
                }
                $s .= $sk->endImageHistoryList();
                $wgOut->addHTML( $s );
        }

        function imageLinks()
        {
                global $wgUser, $wgOut;

                $wgOut->addHTML( "<h2>" . wfMsg( "imagelinks" ) . "</h2>\n" );

                $sql = "SELECT cur_namespace,cur_title FROM imagelinks,cur WHERE il_to='" .
                  wfStrencode( $this->mTitle->getDBkey() ) . "' AND il_from=cur_id";
                $res = wfQuery( $sql, DB_READ, "Article::imageLinks" );

                if ( 0 == wfNumRows( $res ) ) {
                        $wgOut->addHtml( "<p>" . wfMsg( "nolinkstoimage" ) . "</p>\n" );
                        return;
                }
                $wgOut->addHTML( "<p>" . wfMsg( "linkstoimage" ) .  "</p>\n<ul>" );

                $sk = $wgUser->getSkin();
                while ( $s = wfFetchObject( $res ) ) {
                        $name = Title::MakeTitle( $s->cur_namespace, $s->cur_title );
                        $link = $sk->makeKnownLinkObj( $name, "" );
                        $wgOut->addHTML( "<li>{$link}</li>\n" );
                }
                $wgOut->addHTML( "</ul>\n" );
        }

        function delete()
        {
                global $wgUser, $wgOut, $wgRequest;

                $confirm = $wgRequest->getBool( 'wpConfirm' );
                $image = $wgRequest->getVal( 'image' );
                $oldimage = $wgRequest->getVal( 'oldimage' );
                
                # Only sysops can delete images. Previously ordinary users could delete 
                # old revisions, but this is no longer the case.
                if ( !$wgUser->isSysop() ) {
                        $wgOut->sysopRequired();
                        return;
                }
                if ( wfReadOnly() ) {
                        $wgOut->readOnlyPage();
                        return;
                }

                # Better double-check that it hasn't been deleted yet!
                $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
                if ( !is_null( $image ) ) {
                        if ( "" == trim( $image ) ) {
                                $wgOut->fatalError( wfMsg( "cannotdelete" ) );
                                return;
                        }
                }
                
                # Deleting old images doesn't require confirmation
                if ( !is_null( $oldimage ) || $confirm ) {
                        $this->doDelete();
                        return;
                }
                
                if ( !is_null( $image ) ) {
                        $q = "&image=" . urlencode( $image );
                } else if ( !is_null( $oldimage ) ) {
                        $q = "&oldimage=" . urlencode( $oldimage );
                } else {
                        $q = "";
                }
                return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
        }

        function doDelete()
        {
                global $wgOut, $wgUser, $wgLang, $wgRequest;
                global $wgUseSquid, $wgInternalServer, $wgDeferredUpdateList;
                $fname = "Article::doDelete";

                $reason = $wgRequest->getVal( 'wpReason' );
                $image = $wgRequest->getVal( 'image' );
                $oldimage = $wgRequest->getVal( 'oldimage' );

                if ( !is_null( $image ) ) {
                        $dest = wfImageDir( $image );
                        $archive = wfImageDir( $image );
                        if ( ! @unlink( "{$dest}/{$image}" ) ) {
                                $wgOut->fileDeleteError( "{$dest}/{$image}" );
                                return;
                        }
                        $sql = "DELETE FROM image WHERE img_name='" .
                          wfStrencode( $image ) . "'";
                        wfQuery( $sql, DB_WRITE, $fname );

                        $sql = "SELECT oi_archive_name FROM oldimage WHERE oi_name='" .
                          wfStrencode( $image ) . "'";
                        $res = wfQuery( $sql, DB_READ, $fname );
                        
                        # Squid purging
                        if ( $wgUseSquid ) {
                                $urlArr = Array(
                                        $wgInternalServer . Image::wfImageUrl( $image )
                                );
                                wfPurgeSquidServers($urlArr);
                        }
                        

                        $urlArr = Array();
                        while ( $s = wfFetchObject( $res ) ) {
                                $this->doDeleteOldImage( $s->oi_archive_name );
                                $urlArr[] = $wgInternalServer.wfImageArchiveUrl( $s->oi_archive_name );
                        }       
                        
                        # Squid purging, part II
                        if ( $wgUseSquid ) {
                                /* this needs to be done after LinksUpdate */
                                $u = new SquidUpdate( $urlArr );
                                array_push( $wgDeferredUpdateList, $u );
                        }
                        
                        $sql = "DELETE FROM oldimage WHERE oi_name='" .
                          wfStrencode( $image ) . "'";
                        wfQuery( $sql, DB_WRITE, $fname );

                        # Image itself is now gone, and database is cleaned.
                        # Now we remove the image description page.

                        $nt = Title::newFromText( $wgLang->getNsText( Namespace::getImage() ) . ":" . $image );
                        $article = new Article( $nt );
                        $article->doDeleteArticle( $reason ); # ignore errors

                        $deleted = $image;
                } else if ( !is_null( $oldimage ) ) {
                        # Squid purging
                        if ( $wgUseSquid ) {
                                $urlArr = Array(
                                        $wgInternalServer.wfImageArchiveUrl( $oldimage )
                                );
                                wfPurgeSquidServers($urlArr);
                        }
                        $this->doDeleteOldImage( $oldimage );
                        $sql = "DELETE FROM oldimage WHERE oi_archive_name='" .
                          wfStrencode( $oldimage ) . "'";
                        wfQuery( $sql, DB_WRITE, $fname );

                        $deleted = $oldimage;
                } else {
                        $this->doDeleteArticle( $reason ); # ignore errors
                        $deleted = $this->mTitle->getPrefixedText();
                }
                $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
                $wgOut->setRobotpolicy( "noindex,nofollow" );

                $sk = $wgUser->getSkin();
                $loglink = $sk->makeKnownLink( $wgLang->getNsText(
                  Namespace::getWikipedia() ) .
                  ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );

                $text = wfMsg( "deletedtext", $deleted, $loglink );

                $wgOut->addHTML( "<p>" . $text . "</p>\n" );
                $wgOut->returnToMain( false );
        }

        function doDeleteOldImage( $oldimage )
        {
                global $wgOut;

                $name = substr( $oldimage, 15 );
                $archive = wfImageArchiveDir( $name );
                if ( ! unlink( "{$archive}/{$oldimage}" ) ) {
                        $wgOut->fileDeleteError( "{$archive}/{$oldimage}" );
                }
        }

        function revert()
        {
                global $wgOut, $wgRequest;
                global $wgUseSquid, $wgInternalServer, $wgDeferredUpdateList;

                $oldimage = $wgRequest->getText( 'oldimage' );
                
                if ( strlen( $oldimage ) < 16 ) {
                        $wgOut->unexpectedValueError( "oldimage", $oldimage );
                        return;
                }
                if ( wfReadOnly() ) {
                        $wgOut->readOnlyPage();
                        return;
                }
                $name = substr( $oldimage, 15 );

                $dest = wfImageDir( $name );
                $archive = wfImageArchiveDir( $name );
                $curfile = "{$dest}/{$name}";

                if ( ! is_file( $curfile ) ) {
                        $wgOut->fileNotFoundError( $curfile );
                        return;
                }
                $oldver = wfTimestampNow() . "!{$name}";
                $size = wfGetSQL( "oldimage", "oi_size", "oi_archive_name='" .
                  wfStrencode( $oldimage ) . "'" );

                if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
                        $wgOut->fileRenameError( $curfile, "${archive}/{$oldver}" );
                        return;
                }
                if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
                        $wgOut->fileCopyError( "${archive}/{$oldimage}", $curfile );
                }
                wfRecordUpload( $name, $oldver, $size, wfMsg( "reverted" ) );
                # Squid purging
                if ( $wgUseSquid ) {
                        $urlArr = Array(
                                $wgInternalServer.wfImageArchiveUrl( $name ),
                                $wgInternalServer . Image::wfImageUrl( $name )
                        );
                        wfPurgeSquidServers($urlArr);
                }

                $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
                $wgOut->setRobotpolicy( "noindex,nofollow" );
                $wgOut->addHTML( wfMsg( "imagereverted" ) );
                $wgOut->returnToMain( false );
        }
}

?>

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