<?php
class APML_Parser {
	// APML Parser Class version 1.0
	// By Jon Cianciullo - Founder of Cluztr.com
	// Email: jon.cianciullo@gmail.com
	// Based on the IAM_OPML_Parser class 
	// Ref: http://www.phpclasses.org/browse/file/19995.html
	var $parser;
	var $data;
	var $index = 0;

	// Outline items we wish to map and their mapping names:  'attribute_name' => 'var_name'
	var $apml_map_vars = array (
		'KEY' => 'concept_key',
		'VALUE' => 'value',
		'UPDATED' => 'updated',
		'FROM' => 'from'
	);

	/**
	 * Fetch Contents of Page (from URL).
	 *
	 * @param string $url
	 * @return string contents of the page at $url
	 */
	function getContent($url = '') {
		$html = @ file_get_contents($url);
		return $html;
	}

	function ParseElementStart($parser, $tagName, $attrs) {
		$map = $this->apml_map_vars;
		if ($tagName == 'CONCEPT') {
			foreach (array_keys($this->apml_map_vars) as $key) {
				if (isset ($attrs[$key])) {
					$$map[$key] = $attrs[$key];
				}
			}
			// save the data away.
			$this->data[$this->index] = strtolower($concept_key);
			//$this->data[$this->index]['value'] = (float) $value; // cast to float
		  //$this->data[$this->index]['updated'] = $updated;
			//$this->data[$this->index]['from'] = $from;
			$this->index++;
		} // end if outline
	}

	function ParseElementEnd($parser, $name) {
		// nothing to do.
	}

	function ParseElementCharData($parser, $name) {
		// nothing to do.
	}

	function Parse($XMLdata) {
		$this->parser = xml_parser_create();
		xml_set_object($this->parser, $this);

		xml_set_element_handler($this->parser, array (
			& $this,
			'ParseElementStart'
		), array (
			& $this,
			'ParseElementEnd'
		));

		xml_set_character_data_handler($this->parser, array (
			& $this,
			'ParseElementCharData'
		));

		xml_parse($this->parser, $XMLdata);

		xml_parser_free($this->parser);

	}

	function getFeeds($apml_url) {
		$this->index = 0;
		$this->Parse($this->getContent($apml_url));
		$this->index = 0;
		return $this->data;
	}

	function getAPMLConcepts($apml_url) {
		return $this->getFeeds($apml_url);
	}
}
?>