// Global variables.
$client_count = 15; // should be 15 clients


function LoadConfig() {

	$cfg = fopen("VacForce.txt","r");

	// all that's in this file is the function that client software needs to decode

	if ($cfg) {
		// we now have the id
		$fcn_id = fscanf($cfg, "%d");
	}

	fclose($cfg);
}

function SaveConfig() {
	$cfg = fopen("VacForce.txt","w");

	// all that's in this file is the function that client software needs to decode

	if ($cfg) {
		fprintf($cfg,"%d",$fcn_id);
	}

	fclose($cfg);
}

function WriteWinner() {
	$winners = fopen("VacKeys.txt","a+");

	if ($winners) {
			// print out the key
			fprintf($winners,"%s\n",$_GET['result_key']);

	}

	fclose($winners);
}


function CheckClients() {

	// Update clients by checking the IDs.
	// If one hasn't responded within two minutes we tell other clients to suspend
	// until it is back up and running.

}


/******************** ENTRY POINT ************************/

// Setup list of functions we're decoding, and ones we need to decode
$fcn_list = array( '0', '1', '2', '3', '4', '5', '6', );

// Load config (which is just the function # in a file somewhere)
LoadConfig();

// Refresh to see if a client isn't responding. If one of our clients isn't responding,
// we assume a client has dropped, in which case we tell other clients to save the state.
CheckClients();

if ( isset( $_GET['result_key'] ) ) {

		// Write the winning key out
		WriteWinner();

		// Now what we need to do is update the function id,
		// by sorting through the array and using the next number in line.
		// If we can't find it, we use -1 to tell the clients that we're done.

}


// Now format a simple text document containing the ID of the function
// that we're looking for the key with.


echo