root/lang/perl/plagger/lib/Plagger/Plugin/Filter/BreakEntriesToSubscriptions.pm

package Plagger::Plugin::Filter::BreakEntriesToSubscriptions;
use strict;
use base qw( Plagger::Plugin );

sub register {
    my($self, $context) = @_;
    $context->register_hook(
        $self,
        'update.feed.fixup' => \&break,
    );
}

sub break {
    my($self, $context, $args) = @_;

    for my $entry ($args->{feed}->entries) {
        my $feed = $args->{feed}->clone;
        $feed->clear_entries;

        $feed->add_entry($entry);
        $feed->link($entry->link);
        $feed->url($entry->link);
        eval {
            use HTML::TokeParser;
            my $agent = Plagger::UserAgent->new;
            my $res = $agent->fetch($entry->link, $self);
            my $parser = HTML::TokeParser->new(\$res->content);
            while (my $token = $parser->get_tag("link")) {
                my $attr = $token->[1];
                if ($attr->{rel} eq 'alternate'
                        && ($attr->{type} eq 'application/rss+xml'
                         or $attr->{type} eq 'application/atom+xml')) {
                    $feed->url(URI->new_abs($attr->{href}, $entry->link)-> as_string);
                    last;
                }
            }
        } if $self->conf->{use_auto_discovery};
        $feed->title($entry->title)
            if $self->conf->{use_entry_title};
        $context->subscription->add($feed);
    }

    $context->subscription->delete_feed($args->{feed});
}

1;

__END__

=head1 NAME

Plagger::Plugin::Filter::BreakEntriesToSubscriptions - some entry = 1 subscription

=head1 SYNOPSIS

  - module: Filter::BreakEntriesToSubscriptions

=head1 DESCRIPTION

This plugin breaks all the subscription entries into a single feed. This is
a fairly hackish plugin but it's helpful for make OPML from feeds.

=head1 CONFIG

=over 4

=item use_entry_title

Use subscription's title as a newly generated feed title. Defaults to 0.

=back

=head1 AUTHOR

Yasuhiro Matsumoto

=head1 THANKS

Tatsuhiko Miyagawa

=head1 SEE ALSO

L<Plagger>

=cut