# The LearningOnline Network with CAPA
# A debugging harness.
#
# $Id: lontest.pm,v 1.19 2006/03/19 21:54:41 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
#

package Apache::lontest;

use strict;
use Apache::Constants qw(:common :http);
use GDBM_File;
use Apache::loncommon;
use Apache::lonnet;

# section takes one env var name as input, and returns
# what section the given env var is in, which is the part
# of the env var before the first period.
# Returns the section, or blank string for 'no section',
# which is normal for the standard env vars like REQUEST_URI.
sub section
{
    my ($name) = @_;
    return $1 if $name =~ m/\A([^.]*)\./;
    return '';
}

sub print_hash {
    my ($r,$hash)=@_;
    my $i=0;
    my $interval = 20; # change this to change how many keys/table
    my $prevSection = ''; # keeps track of the section we're in.

    foreach my $envkey (sort(keys(%{$hash}))) {
	if (not ($i % $interval)) {
	    $r->print('</table>') unless $i eq 0;
	    $r->print('<table border="0">');
	}
	my $sec = section($envkey);
	
	if ($prevSection ne $sec) { # new section, print header 
	    $r->print('<tr><td colspan="2">');
	    $r->print("<br /><br /><h2 style='color: #008800'><u>$sec</u></h2>");
	    $r->print('</td></tr>');
	    $prevSection = $sec;
	}

	my $envVal = $hash->{$envkey};
	$envVal =~ s/(.{50})/$1\<wbr\>/g;
	$envkey =~ s/(.{30})/$1\<wbr\>/g;
	 
	$r->print("<tr><td valign='top'><b>$envkey</b></td>");
	$r->print("<td valign='top'>$envVal</td></tr>\n");
	$i++;
    }

    $r->print('</table></font><h1>Total Number of Elements: '.$i.'</h1>');
}
sub handler {
    my $r = shift;
    &Apache::loncommon::content_type($r,'text/html');
    $r->send_http_header;
    return OK if $r->header_only;

    $r->print(&Apache::loncommon::start_page("List Environment",undef,
					     {'function' => 'admin'}));

    $r->print("<hr /><h1>Debugging</h1><hr />\n");
    $r->print("<font face='Courier'>");
    $r->print("<hr /><h2>ENV</h2><hr />\n");
    &print_hash($r,\%ENV);
    $r->print("<hr /><h2>env</h2><hr />\n");
    &print_hash($r,\%env);
# ------------------------------------------------ If in a course, print hashes
    if ($env{'request.course.id'}) {

	my %parmhash;
	my %symbhash;
	my %hash;

	my $fn=$env{'request.course.fn'};

	if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
	    $r->print('<h2>Big Hash</h2>');
	    foreach (sort keys %hash) {
		$r->print("\n<br />".$_.': '.$hash{$_});
	    }
	    untie %hash;
	} else {
	    $r->print('<h2>Count not tie big hash</h2>');
	}
	if (tie(%parmhash,'GDBM_File',
		$env{'request.course.fn'}.'_parms.db',
		&GDBM_READER(),0640)) {
	    $r->print('<h2>Parm Hash</h2>');
	    foreach (sort keys %parmhash) {
	        $r->print("\n<br />".$_.': '.$parmhash{$_});
	    }
	    untie %parmhash;
	} else {
            $r->print('<h2>Could not tie parmhash</h2>');
	}
	if (tie(%symbhash,'GDBM_File',"$fn\_symb.db",&GDBM_READER(),0640)) {
            $r->print('<h2>Symb Hash</h2>');
            foreach (sort keys %symbhash) {
		$r->print("\n<br />".$_.': '.$symbhash{$_});
            }
            untie %symbhash;
	} else {
            $r->print('<h2>Could not tie symbhash</h2>');
	}
	if (-e $fn.'.state') {
	    $r->print('<h2>State</h2>');
	    my @conditions=();
	    {
		my $fh=Apache::File->new($fn.'.state');
		@conditions=<$fh>;
	    }
	    foreach (@conditions) {
		$r->print('<tt>'.$_.'</tt><br />');
	    }
	}
    }
 
# ------------------------------------------------------------------- End Debug
     $r->print(&Apache::loncommon::end_page());    
     return OK;
 }


1;
__END__