# The LearningOnline Network with CAPA
# Publication Handler
# 
# (TeX Content Handler
#
# 05/29/00,05/30,10/11 Gerd Kortemeyer)
#
# 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer

package Apache::lonpublisher;

use strict;
use Apache::File;
use File::Copy;
use Apache::Constants qw(:common :http :methods);
use HTML::TokeParser;
use Apache::lonxml;
use Apache::lonhomework;

my %addid;
my %nokey;
my %language;
my %cprtag;

my %metadatafields;
my %metadatakeys;

my $docroot;

# ----------------------------------------------- Evaluate string with metadata

sub metaeval {
    my $metastring=shift;
   
        my $parser=HTML::TokeParser->new(\$metastring);
        my $token;
        while ($token=$parser->get_token) {
           if ($token->[0] eq 'S') {
	      my $entry=$token->[1];
              my $unikey=$entry;
              if (defined($token->[2]->{'part'})) { 
                 $unikey.='_'.$token->[2]->{'part'}; 
	      }
              if (defined($token->[2]->{'name'})) { 
                 $unikey.='_'.$token->[2]->{'name'}; 
	      }
               map {
		  $metadatafields{$unikey.'.'.$_}=$token->[2]->{$_};
                  if ($metadatakeys{$unikey}) {
		      $metadatakeys{$unikey}.=','.$_;
                  } else {
                      $metadatakeys{$unikey}=$_;
                  }
              } @{$token->[3]};
              if ($metadatafields{$unikey}) {
		  my $newentry=$parser->get_text('/'.$entry);
                  unless ($metadatafields{$unikey}=~/$newentry/) {
                     $metadatafields{$unikey}.=', '.$newentry;
		  }
	      } else {
                 $metadatafields{$unikey}=$parser->get_text('/'.$entry);
              }
          }
       }
}

# -------------------------------------------------------- Read a metadata file

sub metaread {
    my ($logfile,$fn)=@_;
    unless (-e $fn) {
	print $logfile 'No file '.$fn."\n";
        return '<br><b>No file:</b> <tt>'.$fn.'</tt>';
    }
    print $logfile 'Processing '.$fn."\n";
    my $metastring;
    {
     my $metafh=Apache::File->new($fn);
     $metastring=join('',<$metafh>);
    }
    &metaeval($metastring);
    return '<br><b>Processed file:</b> <tt>'.$fn.'</tt>';
}

# --------------------------------------------------------- Various form fields

sub textfield {
    my ($title,$name,$value)=@_;
    return "\n<p><b>$title:</b><br>".
           '<input type=text name="'.$name.'" size=80 value="'.$value.'">';
}

sub hiddenfield {
    my ($name,$value)=@_;
    return "\n".'<input type=hidden name="'.$name.'" value="'.$value.'">';
}

sub selectbox {
    my ($title,$name,$value,%options)=@_;
    my $selout="\n<p><b>$title:</b><br>".'<select name="'.$name.'">';
    map {
        $selout.='<option value="'.$_.'"';
        if ($_ eq $value) { $selout.=' selected'; }
        $selout.='>'.$options{$_}.'</option>';
    } sort keys %options;
    return $selout.'</select>';
}

# -------------------------------------------------------- Publication Step One

sub publish {

    my ($source,$target,$style)=@_;
    my $logfile;
    my $scrout='';

    unless ($logfile=Apache::File->new('>>'.$source.'.log')) {
	return 
         '<font color=red>No write permission to user directory, FAIL</font>';
    }
    print $logfile 
"\n\n================= Publish ".localtime()." Phase One  ================\n";

    if (($style eq 'ssi') || ($style eq 'rat')) {
# ------------------------------------------------------- This needs processing

# ----------------------------------------------------------------- Backup Copy
	my $copyfile=$source.'.save';
        if (copy($source,$copyfile)) {
	    print $logfile "Copied original file to ".$copyfile."\n";
        } else {
	    print $logfile "Unable to write backup ".$copyfile.':'.$!."\n";
          return "<font color=red>Failed to write backup copy, $!,FAIL</font>";
        }
# ------------------------------------------------------------- IDs and indices

        my $maxindex=10;
        my $maxid=10;
        my $content='';
        my $needsfixup=0;

        {
          my $org=Apache::File->new($source);
          $content=join('',<$org>);
        }
        {
          my $parser=HTML::TokeParser->new(\$content);
          my $token;
          while ($token=$parser->get_token) {
              if ($token->[0] eq 'S') {
                  my $counter;
		  if ($counter=$addid{$token->[1]}) {
		      if ($counter eq 'id') {
			  if (defined($token->[2]->{'id'})) {
                             $maxid=
		       ($token->[2]->{'id'}>$maxid)?$token->[2]->{'id'}:$maxid;
			 } else {
                             $needsfixup=1;
                         }
                      } else {
 			  if (defined($token->[2]->{'index'})) {
                             $maxindex=
	   ($token->[2]->{'index'}>$maxindex)?$token->[2]->{'index'}:$maxindex;
			  } else {
                             $needsfixup=1;
			  }
		      }
		  }
              }
          }
      }
      if ($needsfixup) {
          print $logfile "Needs ID and/or index fixup\n".
	        "Max ID   : $maxid (min 10)\n".
                "Max Index: $maxindex (min 10)\n";

          my $outstring='';
          my $parser=HTML::TokeParser->new(\$content);
          my $token;
          while ($token=$parser->get_token) {
              if ($token->[0] eq 'S') {
                  my $counter;
		  if ($counter=$addid{$token->[1]}) {
		      if ($counter eq 'id') {
			  if (defined($token->[2]->{'id'})) {
			      $outstring.=$token->[4];
			  } else {
                              $maxid++;
                              my $thisid=' id="'.$maxid.'"';
			      my $fixup=$token->[4];
                              $fixup=~s/(\<\w+)/$1$thisid/;
                              $outstring.=$fixup;
                              print $logfile 'ID: '.$fixup."\n";
                          }
                      } else {
 			  if (defined($token->[2]->{'index'})) {
			      $outstring.=$token->[4];
			  } else {
                              $maxindex++;
                              my $thisindex=' index="'.$maxindex.'"';
			      my $fixup=$token->[4];
                              $fixup=~s/(\<\w+)/$1$thisindex/;
                              $outstring.=$fixup;
                              print $logfile 'Index: '.$fixup."\n";
			  }
		      }
		  } else {
                      $outstring.=$token->[4];
                  }
              } elsif ($token->[0] eq 'E') {
                  $outstring.=$token->[2];
              } else {
                  $outstring.=$token->[1];
              }
          }
        {
          my $org;
          unless ($org=Apache::File->new('>'.$source)) {
             print $logfile "No write permit to $source\n";
             return 
              "<font color=red>No write permission to $source, FAIL</font>";
	  }
          print $org $outstring;
        }
	  $content=$outstring;
          print $logfile "End of ID and/or index fixup\n".
	        "Max ID   : $maxid (min 10)\n".
                "Max Index: $maxindex (min 10)\n";
      } else {
	  print $logfile "Does not need ID and/or index fixup\n";
      }

# --------------------------------------------- Initial step done, now metadata

# ---------------------------------------- Storage for metadata keys and fields

     %metadatafields=();
     %metadatakeys=();
     
     my %oldparmstores=();

# ------------------------------------------------ First, check out environment
     unless (-e $source.'.meta') {
        $metadatafields{'author'}=$ENV{'environment.firstname'}.' '.
	                          $ENV{'environment.middlename'}.' '.
		                  $ENV{'environment.lastname'}.' '.
		                  $ENV{'environment.generation'};
        $metadatafields{'author'}=~s/\s+/ /g;
        $metadatafields{'author'}=~s/\s+$//;
        $metadatafields{'owner'}=$ENV{'user.name'}.'@'.$ENV{'user.domain'};

# ------------------------------------------------ Check out directory hierachy

        my $thisdisfn=$source;
        $thisdisfn=~s/^\/home\/$ENV{'user.name'}\///;

        my @urlparts=split(/\//,$thisdisfn);
        $#urlparts--;

        my $currentpath='/home/'.$ENV{'user.name'}.'/';

        map {
	    $currentpath.=$_.'/';
            $scrout.=&metaread($logfile,$currentpath.'default.meta');
        } @urlparts;

# ------------------- Clear out parameters and stores (there should not be any)

        map {
	    if (($_=~/^parameter/) || ($_=~/^stores/)) {
		delete $metadatafields{$_};
            }
        } keys %metadatafields;

    } else {
# ---------------------- Read previous metafile, remember parameters and stores

        $scrout.=&metaread($logfile,$source.'.meta');

        map {
	    if (($_=~/^parameter/) || ($_=~/^stores/)) {
                $oldparmstores{$_}=1;
		delete $metadatafields{$_};
            }
        } keys %metadatafields;
        
    }

# -------------------------------------------------- Parse content for metadata

        my $allmeta=Apache::lonxml::xmlparse('meta',$content);
#        &metaeval($allmeta);

# ---------------- Find and document discrepancies in the parameters and stores

        my $chparms='';
        map {
	    if (($_=~/^parameter/) || ($_=~/^stores/)) {
                unless ($_=~/\.\w+$/) { 
                   unless ($oldparmstores{$_}) {
		      print $logfile 'New: '.$_."\n";
                      $chparms.=$_.' ';
                   }
	        }
            }
        } sort keys %metadatafields;
        if ($chparms) {
	    $scrout.='<p><b>New parameters or stored values:</b> '.
                     $chparms;
        }

        my $chparms='';
        map {
	    if (($_=~/^parameter/) || ($_=~/^stores/)) {
                unless (($metadatafields{$_.'.name'}) || ($_=~/\.\w+$/)) {
		    print $logfile 'Obsolete: '.$_."\n";
                    $chparms.=$_.' ';
                }
            }
        } sort keys %oldparmstores;
        if ($chparms) {
	    $scrout.='<p><b>Obsolete parameters or stored values:</b> '.
                     $chparms;
        }

# ------------------------------------------------------- Now have all metadata

        $scrout.=
     '<form action="/adm/publish" method="post">'.
          &hiddenfield('phase','two').
          &hiddenfield('filename',$ENV{'form.filename'}).
	  &hiddenfield('allmeta',&Apache::lonnet::escape($allmeta)).
          &textfield('Title','title',$metadatafields{'title'}).
          &textfield('Author(s)','author',$metadatafields{'author'}).
	  &textfield('Subject','subject',$metadatafields{'subject'});

# --------------------------------------------------- Scan content for keywords

	my $keywordout='<p><b>Keywords:</b><br><table border=2><tr>';
        my $colcount=0;
        
	{
	    my $textonly=$content;
            $textonly=~s/\<script[^\<]+\<\/script\>//g;
            $textonly=~s/\<m\>[^\<]+\<\/m\>//g;
            $textonly=~s/\<[^\>]*\>//g;
            $textonly=~tr/A-Z/a-z/;
            $textonly=~s/[\$\&][a-z]\w*//g;
            $textonly=~s/[^a-z\s]//g;

            my %keywords=();
            map {
		unless ($nokey{$_}) {
                   $keywords{$_}=1;
                } 
            } ($textonly=~m/(\w+)/g);

            map {
		$keywords{$_}=1;
            } split(/\W+/,$metadatafields{'keywords'});

            map {
                $keywordout.='<td><input type=checkbox name="key.'.$_.'"';
                if ($metadatafields{'keywords'}=~/$_/) { 
                   $keywordout.=' checked'; 
                }
                $keywordout.='>'.$_.'</td>';
                if ($colcount>10) {
		    $keywordout.="</tr><tr>\n";
                    $colcount=0;
                }
                $colcount++;
            } sort keys %keywords;
            $keywordout.='</tr></table>';

        }         
        
	$scrout.=$keywordout;

        $scrout.=&textfield('Additional Keywords','addkey','');

        $scrout.=&textfield('Notes','notes',$metadatafields{'notes'});

        $scrout.=
             '<p><b>Abstract:</b><br><textarea cols=80 rows=5 name=abstract>'.
              $metadatafields{'abstract'}.'</textarea>';

	$source=~/\.(\w+)$/;

	$scrout.=&hiddenfield('mime',$1);

        $scrout.=&selectbox('Language','language',
                            $metadatafields{'language'},%language);

        unless ($metadatafields{'creationdate'}) {
	    $metadatafields{'creationdate'}=time;
        }
        $scrout.=&hiddenfield('creationdate',$metadatafields{'creationdate'});

        $scrout.=&hiddenfield('lastrevisiondate',time);

			   
	$scrout.=&textfield('Publisher/Owner','owner',
                            $metadatafields{'owner'});

        $scrout.=&selectbox('Copyright/Distribution','copyright',
                            $metadatafields{'copyright'},%cprtag);

    }
    return $scrout.
      '<p><input type="submit" value="Finalize Publication"></form>';
}

# -------------------------------------------------------- Publication Step Two

sub phasetwo {

    my ($source,$target,$style)=@_;
    my $logfile;
    my $scrout='';

    unless ($logfile=Apache::File->new('>>'.$source.'.log')) {
	return 
         '<font color=red>No write permission to user directory, FAIL</font>';
    }
    print $logfile 
"\n================= Publish ".localtime()." Phase Two  ================\n";

     %metadatafields=();
     %metadatakeys=();

     &metaeval(&Apache::lonnet::unescape($ENV{'form.allmeta'}));

     $metadatafields{'title'}=$ENV{'form.title'};
     $metadatafields{'author'}=$ENV{'form.author'};
     $metadatafields{'subject'}=$ENV{'form.subject'};
     $metadatafields{'notes'}=$ENV{'form.notes'};
     $metadatafields{'abstract'}=$ENV{'form.abstract'};
     $metadatafields{'mime'}=$ENV{'form.mime'};
     $metadatafields{'language'}=$ENV{'form.language'};
     $metadatafields{'creationdate'}=$ENV{'form.creationdate'};
     $metadatafields{'lastrevisiondate'}=$ENV{'form.lastrevisiondate'};
     $metadatafields{'owner'}=$ENV{'form.owner'};
     $metadatafields{'copyright'}=$ENV{'form.copyright'};

     my $allkeywords=$ENV{'form.addkey'};
     map {
         if ($_=~/^form\.key\.(\w+)/) {
	     $allkeywords.=','.$1;
         }
     } keys %ENV;
     $allkeywords=~s/\W+/\,/;
     $allkeywords=~s/^\,//;
     $metadatafields{'keywords'}=$allkeywords;
 
     {
       print $logfile "\nWrite metadata file for ".$source;
       my $mfh;
       unless ($mfh=Apache::File->new('>'.$source.'.meta')) {
	return 
         '<font color=red>Could not write metadata, FAIL</font>';
       }    
       map {
	 unless ($_=~/\./) {
           my $unikey=$_;
           $unikey=~/^([A-Za-z]+)/;
           my $tag=$1;
           $tag=~tr/A-Z/a-z/;
           print $mfh "\n\<$tag";
           map {
               my $value=$metadatafields{$unikey.'.'.$_};
               $value=~s/\"/\'\'/g;
               print $mfh ' '.$_.'="'.$value.'"';
           } split(/\,/,$metadatakeys{$unikey});
	   print $mfh '>'.$metadatafields{$unikey}.'</'.$tag.'>';
         }
       } sort keys %metadatafields;
       $scrout.='<p>Wrote Metadata';
       print $logfile "\nWrote metadata";
     }

# ----------------------------------------------------------- Copy old versions
   
if (-e $target) {
    my $filename;
    my $maxversion=0;
    $target=~/(.*)\/([^\/]+)\.(\w+)$/;
    my $srcf=$2;
    my $srct=$3;
    my $srcd=$1;
    unless ($srcd=~/^\/home\/httpd\/html\/res/) {
	print $logfile "\nPANIC: Target dir is ".$srcd;
        return "<font color=red>Invalid target directory, FAIL</font>";
    }
    opendir(DIR,$srcd);
    while ($filename=readdir(DIR)) {
       if ($filename=~/$srcf\.(\d+)\.$srct$/) {
	   $maxversion=($1>$maxversion)?$1:$maxversion;
       }
    }
    closedir(DIR);
    $maxversion++;
    $scrout.='<p>Creating old version '.$maxversion;
    print $logfile "\nCreating old version ".$maxversion;

    my $copyfile=$srcd.'/'.$srcf.'.'.$maxversion.'.'.$srct;

        if (copy($target,$copyfile)) {
	    print $logfile "Copied old target to ".$copyfile."\n";
            $scrout.='<p>Copied old target file';
        } else {
	    print $logfile "Unable to write ".$copyfile.':'.$!."\n";
           return "<font color=red>Failed to copy old target, $!, FAIL</font>";
        }

# --------------------------------------------------------------- Copy Metadata

	$copyfile=$copyfile.'.meta';

        if (copy($target.'.meta',$copyfile)) {
	    print $logfile "Copied old target metadata to ".$copyfile."\n";
            $scrout.='<p>Copied old metadata';
        } else {
	    print $logfile "Unable to write metadata ".$copyfile.':'.$!."\n";
            if (-e $target.'.meta') {
               return 
       "<font color=red>Failed to write old metadata copy, $!, FAIL</font>";
	    }
        }


} else {
    $scrout.='<p>Initial version';
    print $logfile "\nInitial version";
}

# ---------------------------------------------------------------- Write Source
	my $copyfile=$target;

           my @parts=split(/\//,$copyfile);
           my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";

           my $count;
           for ($count=5;$count<$#parts;$count++) {
               $path.="/$parts[$count]";
               if ((-e $path)!=1) {
                   print $logfile "\nCreating directory ".$path;
                   $scrout.='<p>Created directory '.$parts[$count];
		   mkdir($path,0777);
               }
           }

        if (copy($source,$copyfile)) {
	    print $logfile "Copied original source to ".$copyfile."\n";
            $scrout.='<p>Copied source file';
        } else {
	    print $logfile "Unable to write ".$copyfile.':'.$!."\n";
            return "<font color=red>Failed to copy source, $!, FAIL</font>";
        }

# --------------------------------------------------------------- Copy Metadata

        $copyfile=$copyfile.'.meta';

        if (copy($source.'.meta',$copyfile)) {
	    print $logfile "Copied original metadata to ".$copyfile."\n";
            $scrout.='<p>Copied metadata';
        } else {
	    print $logfile "Unable to write metadata ".$copyfile.':'.$!."\n";
            return 
          "<font color=red>Failed to write metadata copy, $!, FAIL</font>";
        }

# --------------------------------------------------- Send update notifications

{

    my $filename;
 
    $target=~/(.*)\/([^\/]+)$/;
    my $srcf=$2;
    opendir(DIR,$1);
    while ($filename=readdir(DIR)) {
       if ($filename=~/$srcf\.(\w+)$/) {
	   my $subhost=$1;
           if ($subhost ne 'meta') {
	       $scrout.='<p>Notifying host '.$subhost.':';
               print $logfile "\nNotifying host '.$subhost.':'";
               my $reply=&Apache::lonnet::critical('update:'.$target,$subhost);
               $scrout.=$reply;
               print $logfile $reply;              
           }
       }
    }
    closedir(DIR);

}

# ------------------------------------------------ Provide link to new resource

    my $thisdistarget=$target;
    $thisdistarget=~s/^$docroot//;

    return $scrout.
	'<p><a href="'.$thisdistarget.'"><font size=+2>View Target</font></a>';
}

# ================================================================ Main Handler

sub handler {
  my $r=shift;

  if ($r->header_only) {
     $r->content_type('text/html');
     $r->send_http_header;
     return OK;
  }

unless ($ENV{'form.pubdir'}) {
# -------------------------------------------------------------- Check filename

  my $fn=$ENV{'form.filename'};

  unless ($fn) { 
     $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
         ' trying to publish empty filename', $r->filename); 
     return HTTP_NOT_FOUND;
  } 

  unless ($ENV{'user.home'} eq $r->dir_config('lonHostID')) {
     $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
         ' trying to publish file '.$ENV{'form.filename'}.
         ' ('.$fn.') - not homeserver ('.$ENV{'user.home'}.')', 
         $r->filename); 
     return HTTP_NOT_ACCEPTABLE;
  }

  $fn=~s/^http\:\/\/[^\/]+\/\~(\w+)/\/home\/$1\/public_html/;

  my $targetdir='';
  $docroot=$r->dir_config('lonDocRoot'); 
  if ($1 ne $ENV{'user.name'}) {
     $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
         ' trying to publish unowned file '.$ENV{'form.filename'}.
         ' ('.$fn.')', 
         $r->filename); 
     return HTTP_NOT_ACCEPTABLE;
  } else {
      $targetdir=$docroot.'/res/'.$ENV{'user.domain'};
  }
                                 
  
  unless (-e $fn) { 
     $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
         ' trying to publish non-existing file '.$ENV{'form.filename'}.
         ' ('.$fn.')', 
         $r->filename); 
     return HTTP_NOT_FOUND;
  } 

unless ($ENV{'form.phase'} eq 'two') {

# --------------------------------- File is there and owned, init lookup tables

  %addid=();

  {
      my $fh=Apache::File->new($r->dir_config('lonTabDir').'/addid.tab');
      while (<$fh>=~/(\w+)\s+(\w+)/) {
          $addid{$1}=$2;
      }
  }

  %nokey=();

  {
     my $fh=Apache::File->new($r->dir_config('lonIncludes').'/un_keyword.tab');
      map {
          my $word=$_;
          chomp($word);
          $nokey{$word}=1;
      } <$fh>;
  }

  %language=();

  {
     my $fh=Apache::File->new($r->dir_config('lonTabDir').'/language.tab');
      map {
          $_=~/(\w+)\s+([\w\s\-]+)/;
          $language{$1}=$2;
      } <$fh>;
  }

  %cprtag=();

  {
     my $fh=Apache::File->new($r->dir_config('lonIncludes').'/copyright.tab');
      map {
          $_=~/(\w+)\s+([\w\s\-]+)/;
          $cprtag{$1}=$2;
      } <$fh>;
  }

}

# ----------------------------------------------------------- Start page output

  $r->content_type('text/html');
  $r->send_http_header;

  $r->print('<html><head><title>LON-CAPA Publishing</title></head>');
  $r->print(
   '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');
  my $thisfn=$fn;
   
# ------------------------------------------------------------- Individual file
  {
      $thisfn=~/\.(\w+)$/;
      my $thistype=$1;
      my $thisembstyle=&Apache::lonnet::fileembstyle($thistype);

      my $thistarget=$thisfn;
      
      $thistarget=~s/^\/home/$targetdir/;
      $thistarget=~s/\/public\_html//;

      my $thisdistarget=$thistarget;
      $thisdistarget=~s/^$docroot//;

      my $thisdisfn=$thisfn;
      $thisdisfn=~s/^\/home\/$ENV{'user.name'}\/public_html\///;

      $r->print('<h2>Publishing '.
        &Apache::lonnet::filedescription($thistype).' <tt>'.
        $thisdisfn.'</tt></h2><b>Target:</b> <tt>'.$thisdistarget.'</tt><p>');
  
# ------------ We are publishing from $thisfn to $thistarget with $thisembstyle

       unless ($ENV{'form.phase'} eq 'two') {
          $r->print('<hr>'.&publish($thisfn,$thistarget,$thisembstyle));
       } else {
          $r->print('<hr>'.&phasetwo($thisfn,$thistarget,$thisembstyle));      
       }  

  }
  $r->print('</body></html>');
} else {

  my $fn=$ENV{'form.filename'};

  $fn=~s/\/[^\/]+$//;
  my $thisprefix=$fn;
  $thisprefix=~s/\/\~/\/priv\//;

  $fn=~s/^http\:\/\/[^\/]+\/\~(\w+)/\/home\/$1\/public_html/;

  unless ($fn) { 
     $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
         ' trying to publish empty directory', $r->filename); 
     return HTTP_NOT_FOUND;
  } 

# ----------------------------------------------------------- Start page output

  $r->content_type('text/html');
  $r->send_http_header;

  $r->print('<html><head><title>LON-CAPA Publishing Directory</title></head>');
  $r->print(
   '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');

  my $thisdisfn=$fn;
  $thisdisfn=~s/^\/home\/$ENV{'user.name'}\/public_html\///;
  
  $r->print('<h1>Publishing directory <tt>'.$thisdisfn.'</tt></h1>');
  my $i=0;
  $r->print('<script>');
    my $filename;
    opendir(DIR,$fn);
       while ($filename=readdir(DIR)) {
           $filename=~/\.(\w+)$/;
           if ((&Apache::lonnet::fileembstyle($1)) && ($1 ne 'meta')) {
	      $r->print(<<ENDOPEN);
	      pub$i=window.open("$thisprefix/$filename","LONCAPApub$i",
                                "menubar=no,height=450,width=650");
ENDOPEN
              $i++;     
	   }
       }
    closedir(DIR);
  $r->print('</script>');

  $r->print('</body></html>');
  
}
  return OK;
}

1;
__END__