#!/usr/bin/perl
#
# 
# Copyright Michigan State University Board of Trustees
# $Id: 
#
# 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/cgi-bin/decompress.pl
#
# http://www.lon-capa.org/
#
# The LearningOnline Network with CAPA
#
# A CGI script that decompresses compressed files for mass uploading into
# construction space
####

#Things still todo, 
#It has been tabinated
#Now uses strict! with added feature of making everything very strict!
#about 50% through rewriting things to use split and join
#still have a lot of debugging statements that will go away after I get it to work ok(along with all the <br>'s)
#still have to rewrite the refresh tag to work right, its broken
#the whole thing is broken right now
#will rename the variables and reorder most of the script to make it more sane
#improve the general readability of the whole thing, because unlike C everyone gets to look at it, so it has to be readable
#will get to it tommorrow night as I have a calc test to "pass" yea, or something like that :0)
use lib '/home/httpd/lib/perl';
use LONCAPA::Configuration;
use LONCAPA::loncgi();
use Apache::lonnet;
use strict; 

if(! &LONCAPA::loncgi::check_cookie_and_load_env()){
    print "Content-type: text/html\n\n";
    print <<END;
	 <html><body>NO COOKIE!</body></html>
END
} else {my $username;
    	print "Content-type: text/html\n\n";
	print "<html><head></head><body>";
	my $path = $ENV{'cgi.path'};
	$path =~ m|/{1}|;
	$path = $'; #' stupid emacs
	$path =~ m|/{1}|;
	$path = $';
	my (@right) = split(/\./,$ENV{'request.role'});
	my $role = shift(@right);
	my $temp = shift(@right);
	my (@left) = split(/\/+/,$temp);;
	shift(@left);
	shift(@left);
	$temp = shift(@left);
	print "temp: $temp";
	my $path2 = "/home/$username/public_html/";
	$path2 .=$path;
	my $back_path = "";
	while($path =~ m|/|) {
		    $back_path .= $`;
		    $back_path .= "/";
		    $path = $'; #' stupid emacs
	}
	$path .= '/';
	$path .= $back_path;
	print "<br>path: $path<br>";
	print "back_path: $back_path <br>";
	print "path2: $path2 <br>";
	print "$path2<br>";
	if ( -r $path2){
		print "Good read access is allowed";
		print "<br><br>";
		print "<br><br>right: $role";
		my $filename = $ENV{'cgi.file'};
		if($role eq "ca" || $role eq "au") {
		chdir $path;
		if      ($filename =~ m|zip|) {
			    system "unzip -qq $path2 &> /dev/null";
		} elsif ($filename =~ m|tar.gz|) {
			    system "tar -zxpvf $path2 &> /dev/null";
		} elsif ($filename =~ m|tar.bz2|){
			   system "tar -jxpvf $path2 &> /dev/null";
		} elsif ($filename =~ m|bz2|){
			    system "bunzip2 $path2 &> /dev/null";
		} elsif ($filename =~ m|tgz|){
			    system "tar -zxpvf $path2 &> /dev/null";
		} elsif ($filename =~ m|gz|){
			    system "gunzip $path2 &> /dev/null";
		} elsif ($filename =~ m|tar|){
			    system "tar -xpvf $path2 &> /dev/null";
		}
		} 
		else {print "You don't have proper privledges";}
	}
	else { print "Read access not allowed!"; }
	#print '<meta http-equiv="refresh" content="0; URL=';
	#print "http://$ENV{'SERVER_NAME'}/~$username'}/$back_path"; print '" />';
	print '</body></html>';
	&Apache::lonnet::delenv('cgi.file');
	&Apache::lonnet::delenv('cgi.path');
}
