#!/usr/bin/perl
#---------------------------------------------------------
#                      infocat
#---------------------------------------------------------
#
# PURPOSE
#  This perl script prints a catalog of the info files
#  available via info2html at this site.
#
# AUTHOR
#   Jon Howell <jonh@cs.dartmouth.edu>
# 
# HISTORY
#    1997.05.16  V 1.0 
#    1998.05.05  V 1.2     became part of info2html distribution
#                          Jon Howell <jonh@cs.dartmouth.edu>
#    2003.09.28  V 1.4dcm  changed the output to be easily parsable
#                          instead of being HTML - for Documancer
#                          Vaclav Slavik <vaclav.slavik@matfyz.cz>
#
#------------------------------------------------------- 

# set here the full path of the info2html.conf
$VERSION = "1.4dcm";
$INFO2HTMLCONF = "helpers/info2html/info2html.conf";
require($INFO2HTMLCONF);  #-- configuration settings
use CGI;

#-- patterns
$NODEBORDER    = '\037\014?';      #-- delimiter of an info node
$REDIRSEP      = '\177';           #-- delimiter in tag tables
$WS            = '[ \t]+';         #-- white space +
$WSS           = '[ \t]*';         #-- white space *
$TE            = '[\t\,\.\n]';     #-- end of a tag
$TAG           = '[^\t\,\.\n]+';   #-- pattern for a tag
$FTAG          = '[^\)]+';         #-- pattern for a file name in
                                   #-- a cross reference

#---------------------------------------------------------
#                      Escape
#---------------------------------------------------------
#  This procedures escapes some special characeters. The
#  escape sequence follows the WWW guide for escaped
#  characters in URLs
#---------------------------------------------------------
sub Escape{
  local($Tag) = @_; 
  #-- escaping is not needed anymore  KG/28.6.94
  #  $Tag =~ s/ /%20/g;     #  space
  #  $Tag =~ s/\+/%AB/g;    #  +
  #-- oh yes it is -- jonh 5/16/97
  #$Tag;
  return CGI::escape($Tag);
}

#----------------------------------------------------------
#                    DeEscape
#----------------------------------------------------------
sub DeEscape{
  local($Tag) = @_;
  #-- deescaping is not needed anymore. KG/28.6.94
  #$Tag =~ s/%AB/+/g;
  #$Tag =~ s/%20/ /g;
  #-- yes it is jonh 5/16/97
  #$Tag;
  return CGI::unescape($Tag);
}

# 
#-------------------  MAIN -----------------------------
# 

#print CGI::header('-type'=>'text/html',
#					'-expires'=>60*60*24);
						# expires each day, in case I add new .info files
						# to the @INFODIR path.
						# -- jonh 1998.05.04

# Collect them all into an array that can be sorted
foreach $dir (@INFODIR) {
    opendir DIR, $dir;
    while ($infofile = readdir(DIR)) {
        if ($infofile =~ m/.info.bz2$/ ) {
            open INFOFILE, "bzcat $dir/$infofile|";
            $collect = 0;
        }
        elsif ($infofile =~ m/.info.gz$/ ) {
            open INFOFILE, "gzip -dc $dir/$infofile|";
            $collect = 0;
        }
        elsif ($infofile =~ m/.info$/) {
                open INFOFILE, $dir."/".$infofile;
                $collect = 0;
        }
        else {
            next;
        }
	$filedesc = "";
	while (<INFOFILE>) {
            last if (m/END-INFO-DIR-ENTRY/);
	    s/^\* //;
	    if ($collect and not ($_ =~ m/^[\s\n]*$/)) {
		$filedesc .= "" if ($collect < 4);
            	$filedesc .= $_;
		--$collect;
		#$filedesc .= " <b>...</b>\n" unless $collect;
	    }
            $collect=4 if (m/START-INFO-DIR-ENTRY/);
	}
	close INFOFILE;
	$filedesc = $infofile if ($filedesc eq "");
	# Add to the hash
	$InfoFile{$filedesc} = $infofile;

	#$filedesc =~ s/\n/\n/;
	# print "<li><a href=\"info2html?($infofile)Top\">$filedesc</a>\n";
    }
}

# Now output the list
my @sorted =  sort { lc($a) cmp lc($b) } keys %InfoFile;
foreach my $name ( @sorted ) {
	print "$InfoFile{$name}/Top.html\n"
	    . "$name\n" ;
}