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=head1 NAME

  RT::Links - A collection of Link objects

=head1 SYNOPSIS

  use RT::Links;
  my $links = new RT::Links($CurrentUser);

=head1 DESCRIPTION


=head1 METHODS



=cut


package RT::Links;

use strict;
no warnings qw(redefine);
use RT::URI;

# {{{ sub Limit 
sub Limit  {
    my $self = shift;
    my %args = ( ENTRYAGGREGATOR => 'AND',
		 OPERATOR => '=',
		 @_);
    

    # If we're limiting by target, order by base
    # (Order by the thing that's changing)

    if ( ($args{'FIELD'} eq 'Target') or 
	 ($args{'FIELD'} eq 'LocalTarget') ) {
	$self->OrderBy (ALIAS => 'main',
			FIELD => 'Base',
			ORDER => 'ASC');
    }
    elsif ( ($args{'FIELD'} eq 'Base') or 
	    ($args{'FIELD'} eq 'LocalBase') ) {
	$self->OrderBy (ALIAS => 'main',
			FIELD => 'Target',
			ORDER => 'ASC');
    }
    

    $self->SUPER::Limit(%args);
}
# }}}

# {{{ LimitRefersTo 

=head2 LimitRefersTo URI

find all things that refer to URI

=cut

sub LimitRefersTo {
    my $self = shift;
    my $URI = shift;

    $self->Limit(FIELD => 'Type', VALUE => 'RefersTo');
    $self->Limit(FIELD => 'Target', VALUE => $URI);
}

# }}}
# {{{ LimitReferredToBy

=head2 LimitReferredToBy URI

find all things that URI refers to

=cut

sub LimitReferredToBy {
    my $self = shift;
    my $URI = shift;

    $self->Limit(FIELD => 'Type', VALUE => 'RefersTo');
    $self->Limit(FIELD => 'Base', VALUE => $URI);
}

# }}}


# {{{ Next
sub Next {
    my $self = shift;
 	
    my $Link = $self->SUPER::Next();
    return $Link unless $Link && ref $Link;

    # skip very invalid Link records
    unless ($Link->Target && $Link->Base) {
        return $self->Next;
    }
    # Skip links to local objects thast are deleted
    if ( $Link->TargetURI->IsLocal and UNIVERSAL::isa($Link->TargetObj,"RT::Ticket")
             and $Link->TargetObj->__Value('status') eq "deleted") {
        return $self->Next;
    } elsif ($Link->BaseURI->IsLocal   and UNIVERSAL::isa($Link->BaseObj,"RT::Ticket")
             and $Link->BaseObj->__Value('status') eq "deleted") {
        return $self->Next;
    } else {
        return $Link;
    }
}

# }}}
1;

