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package Yuki::RSS;
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use strict;
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use vars qw($VERSION);
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$VERSION = '0.2';
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=head1 NAME
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Yuki::RSS - The smallest module to generate RSS 1.0.
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It is downward compatible to XML::RSS.
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=head1 SYNOPSIS
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use strict;
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use Yuki::RSS;
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my $rss = new Yuki::RSS(
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version => '1.0',
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encoding => 'Shift_JIS'
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);
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$rss->channel(
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title => "Site Title",
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link => "http://url.of.your.site/",
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description => "The description of your site",
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);
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$rss->add_item(
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title => "Item Title",
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link => "http://url.of.your/item.html",
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description => "Yoo, hoo, hoo",
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);
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print $rss->as_string;
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=head1 DESCRIPTION
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Yuki::RSS is the smallest RSS 1.0 generator.
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This module helps you to create the minimum document of RSS 1.0.
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If you need more than that, use XML::RSS.
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=head1 METHODS
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=over 4
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=item new Yuki::RSS (version => $version, encoding => $encoding)
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Constructor for Yuki::RSS.
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It returns a reference to a Yuki::RSS object.
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B<version> must be 1.0.
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B<encoding> will be inserted output document as a XML encoding.
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This module does not convert to this encoding.
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=item add_item (title => $title, link => $link, description => $description)
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Adds an item to the Yuki::RSS object.
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=item as_string
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Returns the RSS string.
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=item channel (title => $title, link => $link, description => $desc)
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Channel information of RSS.
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=head1 SEE ALSO
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=over 4
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=item L<XML::RSS>
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=back
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=head1 AUTHOR
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Hiroshi Yuki <hyuki@hyuki.com> http://www.hyuki.com/
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=head1 LICENSE
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Copyright (C) 2001 by Hiroshi Yuki.
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This program is free software; you can redistribute it and/or
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modify it under the same terms as Perl itself.
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=cut
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# The constructor.
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sub new {
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my ($class, %hash) = @_;
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my $self = {
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version => $hash{version},
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encoding => $hash{encoding},
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channel => { },
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items => [],
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};
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return bless $self, $class;
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}
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# Setting channel.
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sub channel {
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my ($self, %hash) = @_;
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foreach (keys %hash) {
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$self->{channel}->{$_} = $hash{$_};
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}
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return $self->{channel};
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}
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# Adding item.
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sub add_item {
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my ($self, %hash) = @_;
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push(@{$self->{items}}, \%hash);
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return $self->{items};
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}
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sub stylesheet ($%) {
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my $self = shift;
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$self->{stylesheet} = {@_};
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}
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#
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sub as_string {
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my ($self) = @_;
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unless ($self->{channel}->{'dc:date'}) {
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$self->{channel}->{'dc:date'} = _rfc3339_date (time);
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} else {
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$self->{channel}->{'dc:date'} = _rfc3339_date ($self->{channel}->{'dc:date'});
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}
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my $doc = '';
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$doc = qq(<?xml version="1.0"@{[$self->{encoding}?qq( encoding="$self->{encoding}"):'']}?>)
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if $self->{channel}->{xml_declare};
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$doc .= <<"EOD";
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@{[ ref ($self->{stylesheet}) ?
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'<?xml-stylesheet '.(join (' ', map {qq($_="@{[&_escape($self->{stylesheet}->{$_})]}")} keys %{$self->{stylesheet}})).'?>':''
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]}
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<rdf:RDF
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xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
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xmlns="http://purl.org/rss/1.0/"
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xmlns:dc="http://purl.org/dc/elements/1.1/"
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>
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<channel rdf:about="@{[&_escape($self->{channel}->{link})]}">
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<title>@{[&_escape($self->{channel}->{title})]}</title>
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<link>@{[&_escape($self->{channel}->{link})]}</link>
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<description>@{[&_escape($self->{channel}->{description})]}</description>
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<dc:language>@{[&_escape($self->{channel}->{'dc:language'})]}</dc:language>
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<dc:date>$self->{channel}->{'dc:date'}</dc:date>
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<items>
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<rdf:Seq>
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@{[
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map {
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qq{<rdf:li rdf:resource="@{[&_escape($_->{link})]}" />}
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} @{$self->{items}}
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]}
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</rdf:Seq>
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</items>
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</channel>
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@{[
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map { do {
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my $r = qq{<item rdf:about="@{[&_escape($_->{link})]}">\n};
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for my $element (keys %{$_}) {
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my $c = $_->{$element};
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$c = _rfc3339_date ($c) if $element eq 'dc:date';
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$r .= qq{ <$element>@{[&_escape($c)]}</$element>\n};
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}
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$r . "</item>\n";
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}} @{$self->{items}}
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]}
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</rdf:RDF>
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EOD
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}
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sub _escape {
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my $s = shift;
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$s =~ s|&|&|g;
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$s =~ s|<|<|g;
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$s =~ s|>|>|g;
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$s =~ s|"|"|g;
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return $s;
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}
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sub _rfc3339_date ($) {
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my @time = gmtime (shift);
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sprintf '%04d-%02d-%02dT%02d:%02d:%02d+00:00', $time[5]+1900,$time[4]+1,@time[3,2,1,0];
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}
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1; # $Date: 2003/03/27 04:15:04 $
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