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<?php
# ***** BEGIN LICENSE BLOCK *****
# This file is part of Clearbricks.
# Copyright (c) 2006 Florent Cotton, Olivier Meunier and contributors.
# All rights reserved.
#
# Clearbricks is free 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.
#
# Clearbricks 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 Clearbricks; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# ***** END LICENSE BLOCK *****
/**
@ingroup CB_NET_FEED
@brief Base feed reader class
Base feed reader, works with feedReader
*/
class feedParser
{
public $feed_type; ///< <b>string</b> Feed type
public $title; ///< <b>string</b> Feed title
public $link; ///< <b>string</b> Feed link
public $description; ///< <b>string</b> Feed description
public $pubdate; ///< <b>string</b> Feed publication date
public $generator; ///< <b>string</b> Feed generator
public $items = array(); ///< <b>array</b> Feed items
protected $xml; ///< <b>SimpleXMLElement</b> Feed XML content
/**
Constructor. Takes some <var>$data</var> as input. Returns false if data is
not a valid XML stream. If everything's fine, feed is parsed and items are
in <var>items</var> property.
@param data <b>string</b> XML stream
*/
public function __construct($data)
{
$this->xml = @simplexml_load_string($data);
if (!$this->xml) {
return false;
}
if (preg_match('/<rdf:RDF/', $data)) {
$this->parseRSSRDF();
} elseif (preg_match('/<rss/', $data)) {
$this->parseRSS();
} elseif (preg_match('!www.w3.org/2005/Atom!', $data)) {
$this->parseAtom10();
} else {
$this->parseAtom03();
}
unset($data);
unset($this->xml);
}
/**
RSS 1.0 parser.
*/
protected function parseRSSRDF()
{
$this->feed_type = 'rss 1.0 (rdf)';
$this->title = (string) $this->xml->channel->title;
$this->link = (string) $this->xml->channel->link;
$this->description = (string) $this->xml->channel->description;
$this->pubdate = (string) $this->xml->channel->children('http://purl.org/dc/elements/1.1/')->date;
# Feed generator agent
$g = $this->xml->channel->children('http://webns.net/mvcb/')->generatorAgent;
if ($g) {
$g = $g->attributes('http://www.w3.org/1999/02/22-rdf-syntax-ns#');
$this->generator = (string) $g['resource'];
}
if (empty($this->xml->item)) {
return;
}
foreach ($this->xml->item as $i)
{
$item = new stdClass();
$item->title = (string) $i->title;
$item->link = (string) $i->link;
$item->creator = (string) $i->children('http://purl.org/dc/elements/1.1/')->creator;
$item->description = (string) $i->description;
$item->content = (string) $i->children('http://purl.org/rss/1.0/modules/content/')->encoded;
$item->subject = $this->nodes2array($i->children('http://purl.org/dc/elements/1.1/')->subject);
$item->pubdate = (string) $i->children('http://purl.org/dc/elements/1.1/')->date;
$item->TS = strtotime($item->pubdate);
$this->items[] = $item;
}
}
/**
RSS 2.0 parser
*/
protected function parseRSS()
{
$this->feed_type = 'rss '.$this->xml['version'];
$this->title = (string) $this->xml->channel->title;
$this->link = (string) $this->xml->channel->link;
$this->description = (string) $this->xml->channel->description;
$this->pubdate = (string) $this->xml->channel->pubDate;
$this->generator = (string) $this->xml->channel->generator;
if (empty($this->xml->channel->item)) {
return;
}
foreach ($this->xml->channel->item as $i)
{
$item = new stdClass();
$item->title = (string) $i->title;
$item->link = (string) $i->link;
$item->creator = (string) $i->children('http://purl.org/dc/elements/1.1/')->creator;
$item->description = (string) $i->description;
$item->content = (string) $i->children('http://purl.org/rss/1.0/modules/content/')->encoded;
$item->subject = array_merge(
$this->nodes2array($i->children('http://purl.org/dc/elements/1.1/')->subject),
$this->nodes2array($i->category)
);
$item->pubdate = (string) $i->pubDate;
$item->TS = strtotime($item->pubdate);
$this->items[] = $item;
}
}
/**
Atom 0.3 parser
*/
protected function parseAtom03()
{
$this->feed_type = 'atom 0.3';
$this->title = (string) $this->xml->title;
$this->description = (string) $this->xml->subtitle;
$this->pubdate = (string) $this->xml->modified;
$this->generator = (string) $this->xml->generator;
foreach ($this->xml->link as $link)
{
if ($link['rel'] == 'alternate' &&
($link['type'] == 'text/html' || $link['type'] == 'application/xhtml+xml')) {
$this->link = (string) $link['href'];
break;
}
}
if (empty($this->xml->entry)) {
return;
}
foreach ($this->xml->entry as $i)
{
$item = new stdClass();
foreach ($i->link as $link)
{
if ($link['rel'] == 'alternate' &&
($link['type'] == 'text/html' || $link['type'] == 'application/xhtml+xml')) {
$item->link = (string) $link['href'];
break;
}
}
$item->title = (string) $i->title;
$item->creator = (string) $i->author->name;
$item->description = (string) $i->summary;
$item->content = (string) $i->content;
$item->subject = $this->nodes2array($i->children('http://purl.org/dc/elements/1.1/')->subject);
$item->pubdate = (string) $i->modified;
$item->TS = strtotime($item->pubdate);
$this->items[] = $item;
}
}
/**
Atom 1.0 parser
*/
protected function parseAtom10()
{
$this->feed_type = 'atom 1.0';
$this->title = (string) $this->xml->title;
$this->description = (string) $this->xml->subtitle;
$this->pubdate = (string) $this->xml->updated;
$this->generator = (string) $this->xml->generator;
foreach ($this->xml->link as $link)
{
if ($link['rel'] == 'alternate' &&
($link['type'] == 'text/html' || $link['type'] == 'application/xhtml+xml')) {
$this->link = (string) $link['href'];
break;
}
}
if (empty($this->xml->entry)) {
return;
}
foreach ($this->xml->entry as $i)
{
$item = new stdClass();
foreach ($i->link as $link)
{
if ($link['rel'] == 'alternate' &&
($link['type'] == 'text/html' || $link['type'] == 'application/xhtml+xml')) {
$item->link = (string) $link['href'];
break;
}
}
$item->title = (string) $i->title;
$item->creator = (string) $i->author->name;
$item->description = (string) $i->summary;
$item->content = (string) $i->content;
$item->subject = $this->nodes2array($i->children('http://purl.org/dc/elements/1.1/')->subject);
$item->pubdate = (string) $i->updated;
$item->TS = strtotime($item->pubdate);
$this->items[] = $item;
}
}
/**
Converts a SimpleXMLElement to an array.
*/
protected function nodes2array(&$nodes)
{
if (empty($nodes)) {
return array();
}
$res = array();
foreach ($nodes as $v)
{
$res[] = (string) $v;
}
return $res;
}
/**
@if
*/
}
?>