Added unlocker classes concept

unlocker.py

@@ -0,0 +1,40 @@
+import time
+import wiringpi2 as wiringpi
+
+class Unlocker(object):
+	"""Abstract class/interface for Unlocker object.
+	Unlocker useful for simulation, but does not actually unlock any lock.
+	"""
+	def __init__(self, config):
+		"""
+		Creates unlocked instance from config, where section named after
+		the class is supposed to exist.
+		
+		@param config: BrmdoorConfig instance
+		"""
+		self.config = config.config
+		self.lockOpenedSecs = config.lockOpenedSecs
+		self.unlockerName = type(self).__name__
+	
+	def unlock(self):
+		"""Unlock lock for given self.lockOpenedSecs.
+		In this class case, it's only simulated
+		"""
+		time.sleep(self.lockOpenedSecs)
+
+
+class UnlockerWiringPi(Unlocker):
+	"""Uses configured pings via WiringPi to open lock.
+	"""
+
+	def __init__(self, config):
+		Unlocker.__init__(self, config)
+		self.lockPin = self.config.getint("UnlockerWiringPi", "lock_pin")
+		wiringpi.pinMode(self.lockPin, 1) #output
+	
+	def unlock(self):
+		"""Unlocks lock at configured pin by pulling it high.
+		"""
+		wiringpi.digitalWrite(self.lockPin, 1)
+		time.sleep(self.lockOpenedSecs)
+		wiringpi.digitalWrite(self.lockPin, 0)