# ipdb/cgi-bin/CommonWeb.pm
###
# SVN revision info
# $Date$
# SVN revision $Rev$
# Last update by $Author$
###

package CommonWeb;

use strict;		
use warnings;
use Exporter;
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);

$VERSION     = 1.00;
@ISA         = qw(Exporter);
@EXPORT_OK      = qw( &printHeader &printError &printAndExit &desanitize &cleanInput &desanitize);

@EXPORT      = (); #export nothing by default
%EXPORT_TAGS = ( ALL => [qw( &printHeader &printError
				&printAndExit &desanitize &cleanInput )],
                 lean    => [qw( &printHeader &printError
				&printAndExit &cleanInput )]
		);


sub printHeader {
  my $title = shift;
  print "Content-type: text/html\n\n";
# This doesn't work well.  Must investigate.
#  my $realm = shift;
#  print qq(WWW-Authenticate: Basic realm="$realm"\n) if $realm;
  open FILE, "../header.inc"
	or carp $!;
  my $html = join('',<FILE>);
  close FILE;

  $html =~ s/\$\$TITLE\$\$/$title/;
# Necessary for mangling arbitrary bits of the header
  my $i=0;
  while (defined(my $param = shift)) {
    $html =~ s/\$\$EXTRA$i\$\$/$param/g;
    $i++;
  }
  print $html;
}

sub printError($)
{
	my $errStr = $_[0];
	print qq(
	<center><p class="regular"> $errStr </p>
	<input type="button" value="Back" onclick="history.go(-1)">
	</center>
	);
}

sub printAndExit($)
{
	my $errStr = $_[0];
	print qq(
	<center><p class="regular"> $errStr </p>
	<input type="button" value="Back" onclick="history.go(-1)">
	</center>
	);
	print "<br>would print footer but already dun gone and shot(self->foot)\n";
	exit(0);
}

# needs a reference to the webvar hash.
# takes out backticks and single quotes
sub cleanInput($)
{
	my $hashRef = $_[0];

	foreach my $key (keys %$hashRef) 
	{
		$hashRef->{$key} =~ s/`/\\`/g;
		$hashRef->{$key} =~ s/'/\'/g;
	}
}

# undoes clean input.  takes a string as an arg.
sub desanitize($)
{
	my $string = $_[0];
	$string =~ s/\\`/`/g;
	$string =~ s/\\'/'/g;
	return $string;
}

# indicate that the module loaded okay.
1;