package Plagger::Plugin::Filter::SortEntries;

use strict;
use warnings;

use base qw( Plagger::Plugin );

sub register {
    my ( $self, $c ) = @_;
    $c->register_hook(
        $self,
        'publish.feed'  => $self->can('entries'),
    );
}

sub entries {
    my ( $self, $c, $args ) = @_;

    my @entries = $args->{'feed'}->entries;

    my $property = $self->conf->{'property'} or
        $c->log( error => "Config 'property' is not specified." ) and return;

    my $sort_sub = '$a->' . $property . ' cmp ' . '$b->' . $property;

    @entries = sort { eval $sort_sub } @entries;
    @entries = reverse @entries if ( $self->conf->{'reverse'} );

    $args->{'feed'}->{'entries'} = \@entries;

    return 1;
}

1;
__END__

=head1 NAME

Plagger::Plugin::Filter::SortEntries - Sort entries of Feed.

=head1 SYNOPSIS

  - module: Filter::SortEntries
    config:
      property: date->format('Epoch')
      reverse: 1

=head1 DESCRIPTION

This plug-in sorts entry of Feed.

=head1 CONFIG

=head2 property

Property for sorting.

=head2 reverse

reverse of sort result

=head1 AUTHOR

Naoki Okamura (Nyarla,) E<lt>thotep@nyarla.netE<gt>

=head1 LICENSE

This Plug-in is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

=head1 SEE ALSO

L<Plagger>

=cut