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package Fripost::Schema;

=head1 NAME

Schema.pm -

=cut

=head1 DESCRIPTION

Schema.pm abstracts the LDAP schema definition and provides methods to
add, list or delete virtual domains, mailboxes, aliases or lists.

=cut

use 5.010_000;
use strict;
use warnings;
use utf8;

use Net::LDAP;
use Authen::SASL;
use Fripost::Schema::Domain;
use Fripost::Schema::Mailbox;
use Fripost::Schema::Alias;
use Fripost::Schema::List;
use Fripost::Schema::Local;


=head1 METHODS

=over 4

=item B<SASLauth> (I<username>, I<CFG>)

Start a LDAP connection, and SASL-authenticate using proxy
authentication for the given (fully-qualified) user. I<CFG> should
contain definitions for the LDAP suffix and the authentication ID.

=cut

sub SASLauth {
    my $class = shift;
    my ($l,$d) = split /\@/, shift, 2;
    my %cfg = @_;

    my $self = bless {}, $class;
    $self->suffix( join ',', @{$cfg{ldap_suffix}} );
    $self->whoami( "fvu=$l,fvd=$d,".$self->suffix );
    $self->ldap( Net::LDAP::->new( $cfg{ldap_uri}, async => 1 ) );

    my $sasl = Authen::SASL::->new(
                   mechanism => 'DIGEST-MD5',
                   callback => { user => $cfg{ldap_authcID}
                               , pass => $cfg{ldap_authcPW}
                               , authname => 'dn:'.$self->whoami }
    );
    my $mesg = $self->ldap->bind( sasl => $sasl );
    # This is not supposed to happen.
    die $mesg->error if $mesg->code;

    return $self;
}


=item B<auth> (I<username>, I<password>, I<CFG>)

Start a LDAP connection, and (simples-) binds the given user.
I<CFG> should contain definitions for the LDAP suffix and URI.

=cut

sub auth {
    my $class = shift;
    my ($l,$d) = split /\@/, shift, 2;
    my $pw = shift;
    my %cfg = @_;

    my $self = bless {}, $class;
    $self->suffix( join ',', @{$cfg{ldap_suffix}} );
    $self->whoami( "fvu=$l,fvd=$d,".$self->suffix );
    $self->ldap( Net::LDAP::->new( $cfg{ldap_uri}, async => 1 ) );

    my $mesg = $self->ldap->bind( $self->whoami, password => $pw );
    if ($mesg->code) {
        die $cfg{'-die'}."\n" if defined $cfg{'-die'};
        die $mesg->error;
    }
    return $self;
}



# The DN of the authorization ID
sub whoami { shift->_set_or_get('_whoami',@_); }

# The LDAP object (of class Net::LDAP)
sub ldap { shift->_set_or_get('_ldap',@_); }

# The suffix under which virtual domains are.
sub suffix { shift->_set_or_get('_suffix',@_); }


# Set or get a key (the first argument), depending on whether a second
# argument is given or not.
sub _set_or_get {
    my $self = shift;
    my $what = shift;

    if (@_) {
        $self->{$what} = $_[0];
    }
    else {
        return $self->{$what};
    }
}



=item B<domain>

Bless the object to C<Fripost::Schema::Domain>, to access
domain-specific methods.

=cut

sub domain { bless shift, 'Fripost::Schema::Domain'; }


=item B<mailbox>

Bless the object to C<Fripost::Schema::Mailbox>, to access
mailbox-specific methods.

=cut

sub mailbox { bless shift, 'Fripost::Schema::Mailbox'; }


=item B<alias>

Bless the object to C<Fripost::Schema::Alias>, to access
alias-specific methods.

=cut

sub alias { bless shift, 'Fripost::Schema::Alias'; }


=item B<list>

Bless the object to C<Fripost::Schema::List>, to access
list-specific methods.

=cut

sub list { bless shift, 'Fripost::Schema::List'; }


=item B<local>

Bless the object to C<Fripost::Schema::Local>, to access
local-specific (mailboxes, aliases and lists) methods.

=cut

sub local { bless shift, 'Fripost::Schema::Local'; }



=item B<done>

Unbinds from the LDAP server.

=cut

sub done {
    my $self = shift;
    $self->ldap->unbind if defined $self and defined $self->ldap;
}


=back

=head1 AUTHOR

Guilhem Moulin C<< <guilhem at fripost.org> >>

=head1 COPYRIGHT

Copyright 2012 Guilhem Moulin.

=head1 LICENSE

This program is free software; you can redistribute it and/or modify it
under the same terms as perl itself.

=cut

1;

__END__