#!/usr/bin/perl -w
#
# 
# -------------------------------------------------------------------
#                                   X-BONE
#
#                          http://www.isi.edu/xbone
#                USC Information Sciences Institute (USC/ISI)
#                   Marina del Rey, California 90292, USA
#                          Copyright (c) 1998-2005
# 
# -------------------------------------------------------------------
#
# Copyright (c) 1998-2005 by the University of Southern California.
# All rights reserved.
#
# Permission to use, copy, modify, and distribute this software and
# its documentation in source and binary forms for non-commercial
# purposes and without fee is hereby granted, provided that the above
# copyright notice appear in all copies and that both the copyright
# notice and this permission notice appear in supporting
# documentation, and that any documentation, advertising materials,
# and other materials related to such distribution and use acknowledge
# that the software was developed by the University of Southern
# California, Information Sciences Institute.  The name of the
# University may not be used to endorse or promote products derived
# from this software without specific prior written permission.
# 
# THE UNIVERSITY OF SOUTHERN CALIFORNIA MAKES NO REPRESENTATIONS ABOUT
# THE SUITABILITY OF THIS SOFTWARE FOR ANY PURPOSE.  THIS SOFTWARE IS
# PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
# INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
# Other copyrights might apply to parts of this software and are so
# noted when applicable.
#
# -------------------------------------------------------------------
#
# Effort partly sponsored by the Defense Advanced Research Projects
# Agency (DARPA) and Air Force Research Laboratory, Air Force Materiel
# Command, USAF, under agreement numbers F30602-98-1-0200 (X-Bone) and
# F30602-01-2-0529 (DynaBone). The views and conclusions contained
# herein are those of the authors and should not be interpreted as
# necessarily representing the official policies or endorsements,
# either expressed or implied, of the Defense Advanced Research
# Projects Agency (DARPA), the Air Force Research Laboratory, or the
# U.S. Government.
#
# This work was partly supported by the NSF STI-XTEND (ANI-0230789)
# and NETFS (ANI-0129689) projects. Any opinions, findings, and
# conclusions or recommendations expressed in this material are those
# of the authors and do not necessarily reflect the views of the
# National Science Foundation.
#
# -------------------------------------------------------------------
#  $RCSfile: xb-xml-destroy.pl,v $
#
# $Revision: 1.17 $
#   $Author: pingali $
#     $Date: 2005/04/10 01:26:55 $
#    $State: Exp $
# ----------------------------------------------------------------------------
#
# Primary Author: Lars Eggert

use strict;
use sigtrap;

my $arch;
BEGIN {
  use Config;
  my $osvers = $Config{osvers};
  $osvers =~ s/(\d+\.\d+).*/$1/;
  $arch = "$Config{archname}-$osvers";
};

use CGI qw(:standard :html3);
use CGI::Carp qw(fatalsToBrowser);

# set library search path
BEGIN {
  use strict;
  use sigtrap;
  use FindBin;
  use Config; 
  delete $ENV{PATH};

  my $version = $Config{'version'}; 
  my $arch = $Config{'archname'}; 
  #my $ldir = $FindBin::RealBin;
  my $ldir = "/usr/local/www/xbone/s-cgi-bin"; 
  foreach my $p ($ldir, 
		 "$ldir/../lib", 
                 "$ldir/../cpan",
                 "$ldir/../cpan/lib/perl5/$version",
                 "$ldir/../cpan/lib/perl5/$version/$arch",
                 "$ldir/../cpan/lib/perl5/site_perl/mach",
                 "$ldir/../cpan/lib/perl5/site_perl/mach/$arch",
                 "$ldir/../cpan/lib/perl5/site_perl/$version",
                 "$ldir/../cpan/lib/perl5/site_perl/$version/$arch",
                 "$ldir/../cpan/lib/perl5/site_perl/$version/mach",
                 "$ldir/../cpan/lib/perl5/site_perl/$version/mach/$arch",
                ) {
    if(-d $p) { unshift @INC, $p; }
  }

  # untaint the resulting include path so "use" works
  foreach my $i (@INC) { if($i =~ /(.*)/) { $i = $1;} }
};

#use XB_Common;
use XB_XML_Interface;
use XB_XML_GUI;
use XB_XML_scan;

use Data::Dumper; 

XB_XML_Interface::init(); 

####################################################
# Example message. 
####################################################
my $canned_destroy_overlay_reply = 
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<!DOCTYPE xbone SYSTEM \"http://www.isi.edu/xbone/software/xbone/api-1.0.dtd\">
<xbone version=\"\" release=\"\">
    <command>
        <destroy_overlay_reply>
            <property  prop=\"overlay_name\"  value=\"testnet\"/>
        </destroy_overlay_reply>
    </command>
</xbone>";

my $canned_list_overlays_reply = 
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<!DOCTYPE xbone SYSTEM \"http://www.isi.edu/xbone/software/xbone/api-1.0.dtd\">
<xbone version=\"\" release=\"\">
    <command>
        <list_overlays_reply>
            <property  prop=\"overlay_name\"  value=\"mango apple banana\"/>
        </list_overlays_reply>
    </command>
</xbone>";

my $myurl = "/cgi-bin/xb-xml-destroy.pl";
my $indexurl = "/cgi-bin/xb-xml-index.pl";

####################################################
# make sure that the manager is defined. 
###################################################

if (not defined param("manager")){
  XB_XML_Interface::show_error "Please specify a manager", "", $indexurl;
}

####################################################
# Construct the user info. it will handy later on. 
###################################################

my %user = XB_XML_Interface::user_info(); 


######################################
# Generate API destroy overlay message
######################################


my ($cmdref, $userid, $authtype, $result, $section);  

if (CGI::https())
  {  
    $userid = $ENV{SSL_CLIENT_EMAILADDRESS};  
    $authtype = 'x509';  
  }
else
  { 
    # shouldnt come here in the first place. 
    $userid = $ENV{REMOTE_ADDR};  
    $authtype = 'ipaddr';  
  };

if (defined (param ('XboneOverlayName')))
  {
    my %hash = (); 
    $hash{auth_type} =  $authtype;
    $hash{overlay_name} = param ('XboneOverlayName'); 
    $hash{user_id} = $userid;
    $hash{user_name} = $user{Name};
    $hash{user_email} = $user{Email};
    $cmdref = XB_XML_GUI::XB_build_destroy_overlay_msg (\%hash);
  }
else
  {
    my %hash = (); 
    $hash{auth_type} =  $authtype;
    $hash{user_id} = $userid;
    $hash{user_name} = $user{Name};
    $hash{user_email} = $user{Email};
    $cmdref = XB_XML_GUI::XB_build_list_overlays_msg ( \%hash);
  };


$result = XB_XML_Interface::OverlayManagerInterface (param("manager"), $$cmdref);
$result =~ s/XBoneEOC//g;
#$result = $canned_list_overlays_reply; 
#########################################
# parse the result of communication with the 
# OM. This will be useful for 
#   - initial gathering of the overlays 
#   - destroy command reply
#########################################

# the result is an XML message. parse it to see if it fine. 
my $parseresult = XB_XML_scan::XB_XML_parse (\$result); 
if ( $parseresult ne "")
  {
    XB_XML_Interface::show_error ("Error while parsing the reply of the OM", $parseresult, $myurl);
  };

# construct a hash to simplify the processing later on. 
my $hashresult = XB_XML_scan::XB_XML_hash (\$result);

# Check to make sure that the the parser was able to parse the 
# message.
if (! $hashresult) {
  XB_XML_Interface::show_error "Invalid response from the Overlay Manager. Please contact" .
	       "&lt;a href=\"http://www.isi.edu/xbone\"&gt;" .
	       "X-Bone Support&lt;/a&gt;", "", $myurl;
}


# fix the properties list 
XB_XML_scan::XB_XOL_xbone_list_sub ($hashresult);

# test the hash 
if (!$hashresult or ! $hashresult->{command}){
  XB_XML_Interface::show_error "Reply from OM could not be parsed.", "", $myurl; 
}


if(not defined param("XboneOverlayName")) {
  
  # show the default page with the overlays. 

  # see if this is an error. If so, show an error. 
  if (defined $hashresult->{command}{error_reply}){
    my $errmsg = $hashresult->{command}{error_reply}{property}{error}; 
    XB_XML_Interface::show_error "Overlay destroy - Error while retrieving overlay list!",  $errmsg, $indexurl; 
  }


  my $overlaylist = 
    $hashresult->{command}{list_overlays_reply}{argstring}[0]{value}; 

  if (not defined $overlaylist){ $overlaylist = ""; }

  my $host = `uname -n`; 
  chomp($host); 

  my @overlays = split (' ', $overlaylist);

  my $msg = "content-type: text/xml\n\n"; 
  $msg .= "<?xml version=\"1.0\"?>\n";
  $msg .= "<?xml-stylesheet type=\"text/xsl\" " .
    "href=\"/xml/destroy-xsl.xml\"?>\n";
  $msg .= "<overlay>\n"; 
  $msg .= "  <user>\n";
  $msg .= "    <name> $user{User} </name>\n";
  $msg .= "    <location>$user{Location}</location>\n";
  $msg .= "    <org>$user{Organization}</org>\n";
  $msg .= "  </user>\n";
  $msg .= "  <manager>" . param("manager") . "</manager>\n";
  $msg .= "  <destroy>\n";
  foreach my $ovl (@overlays) {
    $msg .= "   <ovlname>$ovl</ovlname>\n";
  }
  $msg .= "  </destroy>\n";
  $msg .= "<host>$host</host>\n"; 
  $msg .= "</overlay>\n";
  print $msg;
  exit;
};


# see if this is an error. If so, show an error. 
if (defined $hashresult->{command}{error_reply}){
  my $errmsg = $hashresult->{command}{error_reply}{property}{error}; 
  XB_XML_Interface::show_error "Overlay destory failed!",  $errmsg, $myurl;
}

# if not error, make sure the message is a create message.
if (not defined $hashresult->{command}{destroy_overlay_reply}){
  XB_XML_Interface::show_error "Dont know how to parse the OM reply!", "", $myurl;
}

$section = "Overlay delete operation successful!";
XB_XML_Interface::show_success($section, "", $myurl);

1;