##@file
# Functions shared in Safe jail

##@class
# Functions shared in Safe jail
package Lemonldap::NG::Common::Safelib;

use strict;

#use AutoLoader qw(AUTOLOAD);

our $VERSION = '0.02';

# Set here all the names of functions that must be available in Safe objects.
# Not that only functions, not methods, can be written here
our $functions = [qw(&checkLogonHours &checkDate)];

## @function boolean checkLogonHours(string logon_hours, string syntax, string time_correction, boolean default_access)
# Function to check logon hours
# @param $logon_hours string representing allowed logon hours (GMT)
# @param $syntax optional hexadecimal (default) or octetstring
# @param $time_correction optional hours to add or to subtract
# @param $default_access optional what result to return for users without logons hours
# @return 1 if access allowed, 0 else
sub checkLogonHours {
    my ($logon_hours, $syntax, $time_correction, $default_access) = @_;

    # Active Directory - logonHours: $attr_src_syntax = octetstring
    # Samba - sambaLogonHours: ???
    # LL::NG - ssoLogonHours: $attr_src_syntax = hexadecimal
    $syntax ||= "hexadecimal";

    # Default access if no value
    $default_access ||= "0";
    return $default_access unless $logon_hours;

    # Get the base2 value of logon_hours
    # Each byte represent an hour of the week
    # Begin with sunday at 0h00
    my $base2_logon_hours;
    if ( $syntax eq "octetstring" ) {
        $base2_logon_hours = unpack ("B*", $logon_hours);
    }
    if ( $syntax eq "hexadecimal" ) {
        # Remove white spaces
        $logon_hours =~ s/ //g;
        $base2_logon_hours = unpack ("B*", pack ("H*", $logon_hours));
    }

    # Get the present day and hour
    my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = gmtime(time);

    # Get the hour position
    my $hourpos = $wday*24 + $hour;
    
    # Use time_correction
    if ($time_correction) {
       my ($sign, $time) = ($time_correction =~ /([+|-]?)(\d+)/);
       if ($sign =~ /-/) { $hourpos -= $time; }
       else { $hourpos += $time; }
    }

    # Get the corresponding byte
    return substr($base2_logon_hours, $hourpos, 1);
}

## @function boolean checkDate(string start, string end, boolean default_access)
# Function to check a date
# @param $start string Start date (GMT)
# @param $end string End date (GMT)
# @param $default_access optional what result to return for users without start or end start
# @return 1 if access allowed, 0 else
sub checkDate {
    my ($start, $end, $default_access) = @_;

    # Get date in string
    $start = substr($start, 0, 14);
    $end = substr($end, 0, 14);

    # Default access if no value
    $default_access ||= "0";
    return $default_access unless ($start or $end);

    # If no start, set start to 0
    $start ||= 0;

    # If no end, set end to the end of the world
    $end ||= 999999999999999;

    # Get the present day and hour
    my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = gmtime(time);
    $year += 1900;
    $mon += 1;
    $mon = "0".$mon if ($mon<10);
    $mday = "0".$mday if ($mday<10);
    $hour = "0".$hour if ($hour<10);
    $min = "0".$min if ($min<10);
    $sec = "0".$sec if ($sec<10);

    my $date = $year.$mon.$mday.$hour.$min.$sec;

    return 1 if ( ($date >= $start) and ($date <= $end) );
    return 0;
}


1;
__END__

=head1 NAME

Lemonldap::NG::Common::Safelib - Contains functions that are automatically
imported in Lemonldap::NG Safe objects to be used in expressions like rules,
macros,...

=head1 SYNOPSIS

Private module not documented.

=head1 DESCRIPTION

Private module not documented.

=head1 SEE ALSO

L<Lemonldap::NG::Manager>, L<Lemonldap::NG::Portal>, L<Lemonldap::NG::Handler>

=head1 AUTHOR

Xavier Guimard, E<lt>x.guimard@free.frE<gt>
Clement Oudot

=head1 COPYRIGHT AND LICENSE

Copyright (C) 2009 by Xavier Guimard

This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.10.0 or,
at your option, any later version of Perl 5 you may have available.

=cut