/*-------------------------------------------------------+

| PHP-Fusion Content Management System

| Copyright (C) PHP-Fusion Inc

| https://www.php-fusion.co.uk/

+--------------------------------------------------------+

| Filename: RSS.php

| Author: RobiNN

+--------------------------------------------------------+

| This program is released as free software under the

| Affero GPL license. You can redistribute it and/or

| modify it under the terms of this license which you

| can read by viewing the included agpl.txt or online

| at www.gnu.org/licenses/agpl.html. Removal of this

| copyright header is strictly prohibited without

| written permission from the original author(s).

+--------------------------------------------------------*/



// use \PHPFusion\Rewrite\Permalinks;



class RSS {

 private $max_items = 50000;

 private $items_count = 0;

 private $item_count = 0;

 private $buffer_size = 1000;

 private $writer;

 private $title;

 private $feed_url;

 private $description;



 public function __construct($feed_url = '', $title = NULL, $description = NULL) {

 $this->writer = new XMLWriter();

 $this->feed_url = $feed_url;

 $this->title = $title;

 $this->description = $description;



 //if (fusion_get_settings('site_seo') == 1 && !defined('IN_PERMALINK')) {

 // Permalinks::getPermalinkInstance()->handle_url_routing('');

 // }

 }



 private function CreateXML() {

 $this->item_count++;



 $this->writer->openMemory();

 $this->writer->startDocument('1.0', 'UTF-8');

 $this->writer->setIndent(TRUE);

 $this->writer->startElement('rss');

 $this->writer->writeAttribute('version', '2.0');

 $this->writer->writeAttribute('xmlns:content', 'http://purl.org/rss/1.0/modules/content/');

 $this->writer->writeAttribute('xmlns:atom', 'http://www.w3.org/2005/Atom');



 $this->writer->startElement('channel');



 $title = !empty($this->title) ? $this->title : fusion_get_settings('sitename');

 $this->writer->writeElement('title', $title);



 $this->writer->startElement('atom:link');

 $this->writer->writeAttribute('href', fusion_get_settings('siteurl').'infusions/rss_feeds_panel/feeds/rss_'.$this->feed_url.'.php');

 $this->writer->writeAttribute('rel', 'self');

 $this->writer->writeAttribute('type', 'application/rss+xml');

 $this->writer->endElement(); // close atom:link



 $this->writer->writeElement('link', fusion_get_settings('siteurl'));



 $description = !empty($this->description) ? $this->description : fusion_get_settings('description');

 $this->writer->writeElement('description', html_entity_decode($description)); // mod Wanabo, (html_entity_decode) fix for error element should not contain HTML

 }



 private function CloseXML() {

 if ($this->writer !== NULL) {

 $this->writer->endElement(); // close channel

 $this->writer->endElement(); // close rss

 $this->writer->endDocument();

 $this->Flush();

 }

 }



 public function Write() {

 $this->CloseXML();

 }



 private function Flush() {

 echo $this->writer->flush(TRUE);

 }



 public function AddItem($title, $link, $description) {

 if ($this->items_count === 0) {

 $this->CreateXML();

 } else if ($this->items_count % $this->max_items === 0) {

 $this->CloseXML();

 $this->CreateXML();

 }



 if ($this->items_count % $this->buffer_size === 0) {

 $this->Flush();

 }



 $this->writer->startElement('item');



 $this->writer->startElement('title');

 $this->writer->writeCData(html_entity_decode($title));

 $this->writer->endElement(); // close title



 $this->writer->writeElement('link', $link);



 if (!empty($description)) {

 $this->writer->startElement('description');

 $this->writer->writeCData(html_entity_decode($description));

 $this->writer->endElement(); // close description

 }



 $this->writer->writeElement('guid', html_entity_decode($link)); // mod Wanabo, added guid for becoming a valid RSS feed

 $this->writer->endElement(); // close item



 $this->items_count++;

 }

}