xml_domit_rss.php

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<?php
/**
* DOMIT! RSS is a DOM based RSS parser
* @package domit-rss
* @subpackage domit-rss-main
* @version 0.51
* @copyright (C) 2004 John Heinstein. All rights reserved
* @license http://www.gnu.org/copyleft/lesser.html LGPL License
* @author John Heinstein <[e-mail]>
* @link http://www.engageinteractive.com/domitrss/ DOMIT! RSS Home Page
* DOMIT! RSS is Free Software
**/

if (!defined('DOMIT_RSS_INCLUDE_PATH')) {
	define('DOMIT_RSS_INCLUDE_PATH', (dirname(__FILE__) . DIRECTORY_SEPARATOR));
}

/** current version of DOMIT! RSS */
define ('DOMIT_RSS_VERSION', '0.51');
/** language constant */
define('DOMIT_RSS_ELEMENT_LANGUAGE', 'language');
/** copyright constant */
define('DOMIT_RSS_ELEMENT_COPYRIGHT', 'copyright');
/** managing editor constant */
define('DOMIT_RSS_ELEMENT_MANAGINGEDITOR', 'managingeditor');
/** webmaster constant */
define('DOMIT_RSS_ELEMENT_WEBMASTER', 'webmaster');
/** pubdate constant */
define('DOMIT_RSS_ELEMENT_PUBDATE', 'pubdate');
/** last build date constant */
define('DOMIT_RSS_ELEMENT_LASTBUILDDATE', 'lastbuilddate');
/** category constant */
define('DOMIT_RSS_ELEMENT_CATEGORY', 'category');
/** generator constant */
define('DOMIT_RSS_ELEMENT_GENERATOR', 'generator');
/** docs constant */
define('DOMIT_RSS_ELEMENT_DOCS', 'docs');
/** cloud constant */
define('DOMIT_RSS_ELEMENT_CLOUD', 'cloud');
/** ttl constant */
define('DOMIT_RSS_ELEMENT_TTL', 'ttl');
/** image constant */
define('DOMIT_RSS_ELEMENT_IMAGE', 'image');
/** rating constant */
define('DOMIT_RSS_ELEMENT_RATING', 'rating');
/** textinput constant */
define('DOMIT_RSS_ELEMENT_TEXTINPUT', 'textinput');
/** skiphours constant */
define('DOMIT_RSS_ELEMENT_SKIPHOURS', 'skiphours');
/** skipdays constant */
define('DOMIT_RSS_ELEMENT_SKIPDAYS', 'skipdays');
/** url constant */
define('DOMIT_RSS_ELEMENT_URL', 'url');
/** width constant */
define('DOMIT_RSS_ELEMENT_WIDTH', 'width');
/** height constant */
define('DOMIT_RSS_ELEMENT_HEIGHT', 'height');
/** guid constant */
define('DOMIT_RSS_ELEMENT_GUID', 'guid');
/** enclosure constant */
define('DOMIT_RSS_ELEMENT_ENCLOSURE', 'enclosure');
/** comments constant */
define('DOMIT_RSS_ELEMENT_COMMENTS', 'comments');
/** source constant */
define('DOMIT_RSS_ELEMENT_SOURCE', 'source');
/** name constant */
define('DOMIT_RSS_ELEMENT_NAME', 'name');
/** author constant */
define('DOMIT_RSS_ELEMENT_AUTHOR', 'author');

/** domain constant */
define('DOMIT_RSS_ATTR_DOMAIN', 'domain');
/** port constant */
define('DOMIT_RSS_ATTR_PORT', 'port');
/** path constant */
define('DOMIT_RSS_ATTR_PATH', 'path');
/** registerProcedure constant */
define('DOMIT_RSS_ATTR_REGISTERPROCEDURE', 'registerProcedure');
/** protocol constant */
define('DOMIT_RSS_ATTR_PROTOCOL', 'protocol');
/** url constant */
define('DOMIT_RSS_ATTR_URL', 'url');
/** length constant */
define('DOMIT_RSS_ATTR_LENGTH', 'length');
/** type constant */
define('DOMIT_RSS_ATTR_TYPE', 'type');
/** isPermaLink constant */
define('DOMIT_RSS_ATTR_ISPERMALINK', 'isPermaLink');

require_once(DOMIT_RSS_INCLUDE_PATH . 'xml_domit_rss_shared.php');

/**
* The base DOMIT! RSS document class
*
* @package domit-rss
* @subpackage domit-rss-main
* @author John Heinstein <[e-mail]>
*/
class xml_domit_rss_document extends xml_domit_rss_base_document {
	/**
	* Constructor
	* @param string Path to the rss file
	* @param string Directory in which cache files are to be stored
	* @param string Expiration time (in seconds) for the cache file
	* @return Object A new instance of xml_domit_rss_document
	*/
	function xml_domit_rss_document($url = '', $cacheDir = './', $cacheTime = '3600') {
	    $this->parser = 'DOMIT_RSS';
		$this->xml_domit_rss_base_document($url, $cacheDir, $cacheTime);
	} //xml_domit_rss_document

	/**
	* Performs initialization of the RSS document
	*/
	function _init() {
		$total = $this->node->documentElement->childCount;
		$itemCounter = 0;
		$channelCounter = 0;
		$categoryCounter = 0;

		for ($i = 0; $i < $total; $i++) {
			$currNode =& $this->node->documentElement->childNodes[$i];
			$tagName = strtolower($currNode->nodeName);

			switch ($tagName) {
				case DOMIT_RSS_ELEMENT_ITEM:
					$this->domit_rss_items[$itemCounter] = new xml_domit_rss_item($currNode);
					$itemCounter++;
					break;
				case DOMIT_RSS_ELEMENT_CHANNEL:
					$this->domit_rss_channels[$channelCounter] = new xml_domit_rss_channel($currNode);
					$channelCounter++;
					break;
				case DOMIT_RSS_ELEMENT_CATEGORY:
					$this->domit_rss_categories[$categoryCounter] = new xml_domit_rss_category($currNode);
					$categoryCounter++;
					break;
				case DOMIT_RSS_ELEMENT_IMAGE:
					$this->DOMIT_RSS_indexer[$tagName] = new xml_domit_rss_image($currNode);
					break;
				case DOMIT_RSS_ELEMENT_CLOUD:
					$this->indexer[$tagName] = new xml_domit_rss_cloud($currNode);
					break;
				case DOMIT_RSS_ELEMENT_TEXTINPUT:
					$this->indexer[$tagName] = new xml_domit_rss_textinput($currNode);
					break;
				case DOMIT_RSS_ELEMENT_TITLE:
                case DOMIT_RSS_ELEMENT_LINK:
                case DOMIT_RSS_ELEMENT_DESCRIPTION:
                case DOMIT_RSS_ELEMENT_LANGUAGE:
				case DOMIT_RSS_ELEMENT_COPYRIGHT:
				case DOMIT_RSS_ELEMENT_MANAGINGEDITOR:
				case DOMIT_RSS_ELEMENT_WEBMASTER:
				case DOMIT_RSS_ELEMENT_PUBDATE:
				case DOMIT_RSS_ELEMENT_LASTBUILDDATE:
				case DOMIT_RSS_ELEMENT_GENERATOR:
				case DOMIT_RSS_ELEMENT_DOCS:
				case DOMIT_RSS_ELEMENT_TTL:
				case DOMIT_RSS_ELEMENT_RATING:
				case DOMIT_RSS_ELEMENT_SKIPHOURS:
				case DOMIT_RSS_ELEMENT_SKIPDAYS:
				    $this->DOMIT_RSS_indexer[$tagName] = new xml_domit_rss_simpleelement($currNode);
				    break;
				default:
				    $this->addIndexedElement($currNode);
					//$this->indexer[$tagName] =& $currNode;
			}
		}

		if ($itemCounter != 0) {
			$this->DOMIT_RSS_indexer[DOMIT_RSS_ARRAY_ITEMS] =& $this->domit_rss_items;
		}

		if ($channelCounter != 0) {
			$this->DOMIT_RSS_indexer[DOMIT_RSS_ARRAY_CHANNELS] =& $this->domit_rss_channels;
		}

		if ($categoryCounter != 0) {
			$this->DOMIT_RSS_indexer[DOMIT_RSS_ARRAY_CATEGORIES] =& $this->domit_rss_categories;
		}

		$this->handleChannelElementsEmbedded();
	} //_init

	/**
	* Returns the current version of DOMIT! RSS
	* @return int The current version of DOMIT! RSS
	*/
	function getVersion() {
		return DOMIT_RSS_VERSION;
	} //getVersion
} //xml_domit_rss_document


/**
* Represents an RSS channel
*
* @package domit-rss
* @subpackage domit-rss-main
* @author John Heinstein <[e-mail]>
*/
class xml_domit_rss_channel extends xml_domit_rss_elementindexer {
	/** @var array A list of references to channel items */
	var $domit_rss_items = array();
	/** @var array A list of references to category items */
	var $domit_rss_categories = array();

	/**
	* Constructor
	* @param Object A DOM node containing channel data
	* @param boolean True if channel elements are siblings of the channel rather than children
	*/
	function xml_domit_rss_channel(&$channel, $externalElements = false) {
		$this->node =& $channel;
		$this->rssDefinedElements = array('title','link','description','language','copyright',
											'managingEditor','webmaster','pubDate','lastBuildDate',
											'generator','docs','cloud','ttl','image', 'rating',
											'textInput','skipHours','skipDays','domit_rss_channels',
											'domit_rss_items','domit_rss_categories');
		$this->_init();
	} //xml_domit_rss_channel

	/**
	* Performs initialization of the RSS channel element
	*/
	function _init() {
		$total = $this->node->childCount;
		$itemCounter = 0;
		$categoryCounter = 0;

		for ($i = 0; $i < $total; $i++) {
			$currNode =& $this->node->childNodes[$i];
			$tagName = strtolower($currNode->nodeName);

			switch($tagName) {
				case DOMIT_RSS_ELEMENT_ITEM:
					$this->domit_rss_items[$itemCounter] = new xml_domit_rss_item($currNode);
					$itemCounter++;
					break;
				case DOMIT_RSS_ELEMENT_CATEGORY:
					$this->domit_rss_categories[$categoryCounter] = new xml_domit_rss_category($currNode);
					$categoryCounter++;
					break;
				case DOMIT_RSS_ELEMENT_IMAGE:
					$this->DOMIT_RSS_indexer[$tagName] = new xml_domit_rss_image($currNode);
					break;
				case DOMIT_RSS_ELEMENT_CLOUD:
					$this->DOMIT_RSS_indexer[$tagName] = new xml_domit_rss_cloud($currNode);
					break;
				case DOMIT_RSS_ELEMENT_TEXTINPUT:
					$this->DOMIT_RSS_indexer[$tagName] = new xml_domit_rss_textinput($currNode);
					break;
				case DOMIT_RSS_ELEMENT_SKIPHOURS:
					$this->DOMIT_RSS_indexer[$tagName] = new xml_domit_rss_skiphours($currNode);
					break;
				case DOMIT_RSS_ELEMENT_SKIPDAYS:
					$this->DOMIT_RSS_indexer[$tagName] = new xml_domit_rss_skipdays($currNode);
					break;
                case DOMIT_RSS_ELEMENT_TITLE:
                case DOMIT_RSS_ELEMENT_LINK:
                case DOMIT_RSS_ELEMENT_DESCRIPTION:
                case DOMIT_RSS_ELEMENT_LANGUAGE:
				case DOMIT_RSS_ELEMENT_COPYRIGHT:
				case DOMIT_RSS_ELEMENT_MANAGINGEDITOR:
				case DOMIT_RSS_ELEMENT_WEBMASTER:
				case DOMIT_RSS_ELEMENT_PUBDATE:
				case DOMIT_RSS_ELEMENT_LASTBUILDDATE:
				case DOMIT_RSS_ELEMENT_GENERATOR:
				case DOMIT_RSS_ELEMENT_DOCS:
				case DOMIT_RSS_ELEMENT_TTL:
				case DOMIT_RSS_ELEMENT_RATING:
				    $this->DOMIT_RSS_indexer[$tagName] = new xml_domit_rss_simpleelement($currNode);
				    break;
				default:
				    $this->addIndexedElement($currNode);
					//$this->DOMIT_RSS_indexer[$tagName] =& $currNode;
			}
		}

		if ($itemCounter != 0) {
			$this->DOMIT_RSS_indexer[DOMIT_RSS_ARRAY_ITEMS] =& $this->domit_rss_items;
		}

		if ($categoryCounter != 0) {
			$this->DOMIT_RSS_indexer[DOMIT_RSS_ARRAY_CATEGORIES] =& $this->domit_rss_categories;
		}
	} //_init

	/**
	* Returns the title of the channel
	* @return string The title of the channel, or an empty string
	*/
	function getTitle() {
		return $this->getElementText(DOMIT_RSS_ELEMENT_TITLE);
	} //getTitle

	/**
	* Returns the url of the channel
	* @return string The url of the channel, or an empty string
	*/
	function getLink() {
		return $this->getElementText(DOMIT_RSS_ELEMENT_LINK);
	} //getLink

	/**
	* Returns a description of the channel
	* @return string A description of the channel, or an empty string
	*/
	function getDescription() {
		return $this->getElementText(DOMIT_RSS_ELEMENT_DESCRIPTION);
	} //getDescription

	/**
	* Returns the language of the channel
	* @return string The language of the channel, or an empty string
	*/
	function getLanguage() {
		return $this->getElementText(DOMIT_RSS_ELEMENT_LANGUAGE);
	} //getLanguage

	/**
	* Returns the copyright of the channel
	* @return string The copyright of the channel, or an empty string
	*/
	function getCopyright() {
		return $this->getElementText(DOMIT_RSS_ELEMENT_COPYRIGHT);
	} //getCopyright

	/**
	* Returns the managing editor of the channel
	* @return string The managing editor of the channel, or an empty string
	*/
	function getManagingEditor() {
		return $this->getElementText(DOMIT_RSS_ELEMENT_MANAGINGEDITOR);
	} //getManagingEditor

	/**
	* Returns the webmaster of the channel
	* @return string The webmaster of the channel, or an empty string
	*/
	function getWebMaster() {
		return $this->getElementText(DOMIT_RSS_ELEMENT_WEBMASTER);
	} //getWebMaster

	/**
	* Returns the publication date of the channel
	* @return string The publication date of the channel, or an empty string
	*/
	function getPubDate() {
		return $this->getElementText(DOMIT_RSS_ELEMENT_PUBDATE);
	} //getPubDate

	/**
	* Returns the last build date of the channel
	* @return string The last build date of the channel, or an empty string
	*/
	function getLastBuildDate() {
		return $this->getElementText(DOMIT_RSS_ELEMENT_LASTBUILDDATE);
	} //getLastBuildDate

	/**
	* Returns the generator of the channel
	* @return string The generator of the channel, or an empty string
	*/
	function getGenerator() {
		return $this->getElementText(DOMIT_RSS_ELEMENT_GENERATOR);
	} //getGenerator

	/**
	* Returns the docs of the channel
	* @return string The docs of the channel, or an empty string
	*/
	function getDocs() {
		return $this->getElementText(DOMIT_RSS_ELEMENT_DOCS);