#!/usr/bin/python

DEVICES = ["00:19:4F:A4:B7:5B","08:00:28:45:60:09"]
KEYS = [("/dev/lock0", "k6666")]
NEEDED = 1
LOCK_CMD = "~/bin/onlock"
UNLOCK_CMD = "~/bin/onunlock"

locked = False
haderror = False

import bluetooth
import _bluetooth as _bt
import time
import os

LOCK_CMD = os.path.expanduser(LOCK_CMD)
UNLOCK_CMD = os.path.expanduser(UNLOCK_CMD)

class BluetoothError(Exception):
	pass

def lock():
	print "Locking..."
	os.system(LOCK_CMD)

def unlock():
	print "Unlocking..."
	os.system(UNLOCK_CMD)

def discover():
	try:
		sock = bluetooth._gethcisock()
		return _bt.hci_inquiry(sock, 5, True)
	except _bt.error:
		sock.close()
		print "error communicating with local bluetooth adapter"
		raise BluetoothError

def examine(file, key):
	try:
		return open(file).read(1024).strip() == key
	except IOError:
		return False

while 1:
	try:
		devices = discover()
		print devices
		if haderror:
			haderror = False
			continue
		if len([x for x in devices if x in DEVICES] + [x for x,y in KEYS if examine(x,y)]) >= NEEDED:
			if locked:
				locked = False
				unlock()
		else:
			if not locked:
				locked = True
				lock()
	except BluetoothError:
		haderror = True
		pass