package Feed::Utils;
use strict;
use warnings;
use 5.012;
my @methods;
BEGIN {
    @methods = qw(
      set_feed_args
      set_feed_class
      feed
      feeds
      feeds_from_opml
      );
}
use Sub::Exporter -setup => {
    exports => \@methods,
    groups => {
        default => \@methods,
    },
};
use XML::LibXML;
use Try::Tiny;

my $feed_class = 'Feed';
sub set_feed_class {
    $feed_class = shift;
}
my %feed_args = ();
sub set_feed_args {
    %feed_args = @_;
}

sub feed {
    my (%args) = @_;
    my $feed = $feed_class->new({
        %feed_args,
        %args,
    });

    try {
        $feed->process;
    } catch {
        $feed->log->error($_);
    };

    return;
}

sub feeds {
    my ($common_args,@args) = @_;

    for my $arg (@args) {
        if (!ref($arg)) {
            feed(%$common_args,uri=>$arg);
        }
        else {
            feed(%$common_args,%$arg);
        }
    }

    return;
}

sub feeds_from_opml {
    my ($common_args,$opml_source,$opts) = @_;

    my $opml = try {
        XML::LibXML->load_xml(location => $opml_source);
    } catch { warn $_; return };
    return unless $opml;

    Log::Log4perl::MDC->put( opml => "$opml_source" );

    my @exclude = @{$opts->{exclude} // []};

    for my $feed_node ($opml->findnodes(q{/opml/body/outline[@xmlUrl != '']})) {
        my $title = $feed_node->findvalue('@title')
            // $feed_node->findvalue('@text') // '';
        my $uri = $feed_node->findvalue('@xmlUrl');

        no warnings 'experimental::smartmatch';

        next if $uri ~~ @exclude;

        feed(%$common_args,title=>$title,uri=>$uri);
    }

    Log::Log4perl::MDC->put( opml => undef );

    return;
}

1;