<?php
/**************************************************************
*
* DataFeedFile.com (DFF) Framework API
* Copyright (c) 2008 DataFeedFile.com
*
* DFF Framework API uses CreativeCommons.org by-sa license.
* This license lets others remix, tweak, and build upon your work even for commercial reasons,
* as long as they CREDIT DataFeedFile.com and license their new creations under the identical terms.
* This license is often compared to open source software licenses.
* All new works based on yours will carry the same license, so any derivatives will also allow commercial use.
* Please read our license.txt file for more detail.
*
**************************************************************///
// DFF PHP RSS Class
// Version: 1.0.0
// Date   : 2008.06.29
//

class RSS_Feed {
    public $channel_URL;
    public $channel_title;
    public $channel_description;
    public $channel_language;
    public $channel_copyright;
    public $channel_date;
    public $channel_creator;
    public $channel_subject;   
    public $image_URL;
    public $items = array();
    public $items_count;
    
    public function RSS_Feed(){
        $this->items_count=0;
        $this->channel_URL='';
        $this->channel_title='';
        $this->channel_description='';
        $this->channel_language='';
        $this->channel_copyright='';
        $this->channel_date='';
        $this->channel_creator='';
        $this->channel_subject='';
        $this->image_URL='';
    }   
    
    public function set_channel($url='http://www.datafeedfile.com',$title='DataFeedFile.com - Deals, Rebates, Coupons, Discounts',$description='Daily listing of online coupons, rebates, discounts and deals',$language='en-us',$copyright='DataFeedFile.com (c)2008',$creator='DataFeedFile.com',$subject='Coupon codes, Rebates, Discounts RSS Feed') {
        $this->channel_URL=$url;
        $this->channel_title=$title;
        $this->channel_description=$description;
        $this->channel_language=$language;
        $this->channel_copyright=$copyright;
        $this->channel_date=date("Y-m-d").'T'.date("H:i:s").'+01:00';
        $this->channel_creator=$creator;
        $this->channel_subject=$subject;
    }

    public function set_image($url='http://www.datafeedfile.com/logo.gif') {
        $this->image_URL = $url;
    }

    public function add_item($url, $title, $description) {
        $this->items[$this->items_count]['url']=$url;
        $this->items[$this->items_count]['title']=$title;
        $this->items[$this->items_count]['description']=$description;
        $this->items_count++;
    }

    public function output() {
        $output =  '<?xml version="1.0" encoding="UTF-8"?>'."\n";
        $output .= '<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://purl.org/rss/1.0/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:taxo="http://purl.org/rss/1.0/modules/taxonomy/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:syn="http://purl.org/rss/1.0/modules/syndication/" xmlns:admin="http://webns.net/mvcb/" xmlns:feedburner="http://rssnamespace.org/feedburner/ext/1.0">'."\n";
        $output .= '<channel rdf:about="'.$this->DFF_xml_escape_string($this->channel_URL).'">'."\n";
        $output .= '<title>'.$this->DFF_xml_escape_string($this->channel_title).'</title>'."\n";
        $output .= '<link>'.$this->DFF_xml_escape_string($this->channel_URL).'</link>'."\n";
        $output .= '<description>'.$this->DFF_xml_escape_string($this->channel_description).'</description>'."\n";
        $output .= '<dc:language>'.$this->channel_language.'</dc:language>'."\n";
        $output .= '<dc:rights>'.$this->channel_copyright.'</dc:rights>'."\n";
        $output .= '<dc:date>'.$this->channel_date.'</dc:date>'."\n";
        $output .= '<dc:creator>'.$this->DFF_xml_escape_string($this->channel_creator).'</dc:creator>'."\n";
        $output .= '<dc:subject>'.$this->DFF_xml_escape_string($this->channel_subject).'</dc:subject>'."\n";
        $output .= '<items>'."\n";
        $output .= '<rdf:Seq>';
        foreach($this->items as $item){
            $output .= '<rdf:li rdf:resource="'.$this->DFF_xml_escape_string($item['url']).'"/>'."\n";
        }
        $output .= '</rdf:Seq>'."\n";
        $output .= '</items>'."\n";
        $output .= '<image rdf:resource="'.$this->image_URL.'"/>'."\n";
        $output .= '</channel>'."\n";
        foreach($this->items as $item){
            $output .= '<item rdf:about="'.$this->DFF_xml_escape_string($item['url']).'">'."\n";
            $output .= '<title><![CDATA['.$this->DFF_xml_escape_string($item['title']).']]></title>'."\n";
            $output .= '<link>'.$this->DFF_xml_escape_string($item['url']).'</link>'."\n";
            $output .= '<description>'.$this->DFF_xml_escape_string($item['description']).'</description>'."\n";
            $output .= '<feedburner:origLink>'.$this->DFF_xml_escape_string($item['url']).'</feedburner:origLink>'."\n";
            $output .= '</item>'."\n";  
        }
        $output .= '</rdf:RDF>'."\n";
        return $output;
    }
    
    public function DFF_xml_escape_string($input_str){
      return htmlentities($input_str,ENT_QUOTES,'UTF-8',FALSE);
    }
  
} //end-rss class