<?php

class Whois_Query {

	var $domain, $server, $string, $tld, $is_free;

	function Whois_Query($domain) {
		$this->domain = $domain;
	}

	function getServer() {
		if (strpos($this->domain, '.') === false) {
			trigger_error('No Top Level Domain was specified in '.$this->domain);
			return false;
		}

		$tlds   = explode('.', $this->domain);
		$tld    = $tlds[count($tlds) - 1];
		$where  = 'WHERE tld="'.$tld.'"';
		$fitMap = array($tld => 0);

		for ($i = count($tlds) - 2; $i > 0; $i--) {
			$tld          = $tlds[$i].'.'.$tld;
			$fitMap[$tld] = count($tlds) - 1 - $i;
			$where       .= ' OR tld="'.$tld.'"';
		}

		$query = 'SELECT tld, server, string FROM tld
		          	INNER JOIN tld_server USING(tld_id)
		          	INNER JOIN server USING(server_id)
		          	'.$where.'
		          	GROUP BY tld';

		if (!($result = mysql_query($query)) || mysql_num_rows($result) == 0) {
			trigger_error('There is no Whois Server mapped to this Top Level Domain.');
			return false;
		}

		$fit = -1;
		while ($row = mysql_fetch_assoc($result)) {
			if ($fitMap[$row['tld']] > $fit) {
				$fit    = $fitMap[$row['tld']];
				$server = $row;
			}
		}

		$this->server = $server['server'];
		$this->tld    = $server['tld'];
		$this->string = $server['string'];

		return true;
	}

	function queryServer() {
		$request = &new Whois_Request($this->server);
		$result  = $request->doRequest($this->domain);
		if (!$result) {
			return false;
		}

		$this->is_free = strpos(strtolower($result), $this->string) !== false;

		return true;
	}

	function is_free() {
		return $this->is_free;
	}

}

?>