root/trunk/gregarius/cls/rdf.php

<?php
###############################################################################
# Gregarius - A PHP based RSS aggregator.
# Copyright (C) 2003 - 2006 Marco Bonetti
#
###############################################################################
# This program is free software and open source software; you can redistribute
# it and/or modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the License,
# or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.      See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  or visit
# http://www.gnu.org/licenses/gpl.html
#
###############################################################################
# E-mail:          mbonetti at gmail dot com
# Web page:        http://gregarius.net/
#
###############################################################################


class RDFItemList  {
        
        var $baselink;
        var $resource;
        var $items;
        
        function RDFItemList($items) {
                $this -> items = $items;
        }
        
        function render($title) {
                // trash the output, just in case
                @ ob_end_clean();
                ob_start();
                header('Content-Type: text/xml');
                
                echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n\n"
                ."<rdf:RDF\n"."\txmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"\n"
                ."\txmlns=\"http://purl.org/rss/1.0/\"\n"
                ."\txmlns:taxo=\"http://purl.org/rss/1.0/modules/taxonomy/\"\n"
                ."\txmlns:dc=\"http://purl.org/dc/elements/1.1/\"\n"
                ."\txmlns:syn=\"http://purl.org/rss/1.0/modules/syndication/\"\n"
                ."\txmlns:admin=\"http://webns.net/mvcb/\"\n"
                .">\n\n";

                echo "<channel rdf:about=\"".$this->baselink.$this->resource."\">\n"
                ."\t<title>".htmlentities($title, ENT_QUOTES, 'UTF-8')
                ."</title>\n"."\t<link>".$this->baselink.$this->resource."</link>\n"
                ."\t<description></description>\n"
                ."</channel>\n\n";
                
                if ($this -> items) {
                        foreach ($this -> items -> feeds as $feed) {
                                        foreach($feed->items as $item) {
                                                $xmlTitle = htmlentities($item->title, ENT_QUOTES, 'UTF-8');
                                                echo "<item rdf:about=\"".$item->url."\">\n"."\t<title>$xmlTitle</title>\n"."\t<link>".$item->url."</link>\n"
                                                // http://www.jschreiber.com/archives/2004/03/php_and_timesta_1.html
                                                ."\t<dc:date>".rss_date('Y-m-d\TH:i:sO', $item->date)."</dc:date>\n"
                                                ."\t<dc:subject>$xmlTitle</dc:subject>\n";
                                
                                                if (count($item -> tags)) {
                                                        echo "\t<taxo:topics>\n"."\t\t<rdf:Bag>\n";
                                                        foreach ($item -> tags as $tag) {
                                                                echo "\t\t\t<rdf:li rdf:resource=\"".$this->baselink.$tag."\" />\n";
                                                        }
                                                        echo "\t\t</rdf:Bag>\n".
                                                        "\t</taxo:topics>\n";
                                
                                                }
                                                echo "</item>\n\n";
                                        }
                        }
                }
        echo "</rdf:RDF>\n";
        }
}
?>