<?php defined('SYSPATH') or die('No direct access allowed.');

/**
 * This class is handling Ademco Contact ID Events
 *
 * @package    HAlMon
 * @category   Helpers
 * @author     Deon George
 * @copyright  (c) 2010 Deon George
 * @license    http://dev.leenooks.net/license.html
 */
class Protocol_ContactID extends Protocol {
	protected $_protocol = PROTOCOL_CONTACTID;

	private $_checksum_map = array(
		'0'=>10,
		'1'=>1,
		'2'=>2,
		'3'=>3,
		'4'=>4,
		'5'=>5,
		'6'=>6,
		'7'=>7,
		'8'=>8,
		'9'=>9,
		'*'=>11,
		'#'=>12,
		'A'=>13,
		'B'=>14,
		'C'=>15,
	);

	public function accnum() {
		return substr($this->_id,0,4);
	}

	public function area() {
		return substr($this->_id,10,2);
	}

	// Check that this event is valid
	public function check($id) {
		if (strlen($id) != 16)
			return FALSE;

		// Our checksum should be mod15
		$c = $t = 0;
		while ($c<strlen($id))
			$t += $this->_checksum_map[substr($id,$c++,1)];

		return ($t%15 === 0) ? TRUE : FALSE;
	}

	public function checksum() {
		return substr($this->_id,15,1);
	}

	public function equal() {
		return substr($this->_id,6,1);
	}

	public function etype() {
		return substr($this->_id,7,3);
	}

	public function info() {
		return substr($this->_id,12,3);
	}

	/**
	 * Message Type
	 * @note This is typically always 18
	 */
	public function type() {
		return substr($this->_id,4,2);
	}
}
?>