<?php

class Agi
{
	private static $initialized = FALSE;
	private static $agivars = array ();

	static function init ()
	{
		if (self::$initialized)
			return;
			
		self::$initialized = TRUE;	
		pcntl_signal (SIGHUP, SIG_IGN);
		pcntl_signal (SIGTERM, SIG_IGN);

		while (!feof (STDIN))
		{
			$agivar = trim (fgets (STDIN, 4096));
			$agivar = explode (':', $agivar);

			if (count($agivar) == 2)
				self::$agivars[$agivar[0]] = trim ($agivar[1]);	
		}
	}
	
	static function get ($agivar)
	{
		if (self::$initialized && isset (self::$agivars[$agivar]))
			return self::$agivars[$agivar];
		else
			return NULL;
	}

	static function exec ($cmd, &$result = NULL)
	{
		if (!self::$initialized)
			return -1;
	
		fwrite (STDOUT, "$cmd\n");
		fflush (STDOUT);

		$res = trim (fgets (STDIN, 4096));

		if (preg_match ("/^([0-9]{1,3}) (.*)/", $res, $matches))
		{
			if (preg_match ('/^result=([0-9\-]*)( ?\((.*)\))?$/', $matches[2], $match))
			{		
				$ret = (int) $match[1];
				if ($num > 0)
					$result = $match[3];
					return $ret;
			}
		}

		return -1;
	}
}