import re

class wireless:
	def __init__(self, device = "wlan0"):
		self.device = device
		self.__link = ""
		self.__level = ""
		self.__noise = ""

	def __parse(self):
		f = open("/proc/net/wireless", "r")
		for line in f:
			line = line.strip()
			if re.match("^" + self.device + ".*$", line):
				line = re.sub("\s+", " ", line)
				lst = line.split(" ")
				self.__link = lst[2]
				self.__level = lst[3]
				if re.match(".*\.$", self.__level):
					self.__level = re.sub("\.", "", self.__level)
				self.__noise = lst[4]
				break
		f.close()

	def level(self):
		self.__parse()
		return self.__level

	def link(self):
		self.__parse()
		return self.__link

	def noise(self):
		self.__parse()
		return self.__noise