Added unlocker classes concept

brmdoor_nfc.config.sample

@@ -4,9 +4,20 @@
 #       prevents too many messages
 # log_file - logs read UIDs and when was lock opened, use - for stderr
 # log_level - minimum log level - one of debug, info, warn, error, fatal, default info
+# unlocker - which unlocker class to use - Unlocker or UnlockerWiringPi
+#	Unlocker is just dummy test class. 
 [brmdoor]
 auth_db_filename = test_uids_db.sqlite
 #lock_opened_secs = 5
 #unknown_uid_timeout_secs = 5
 log_file = -
 #log_level = info
+unlocker = Unlocker
+
+# Config section for dummy unlocker. It has no options.
+[Unlocker]
+
+# Config for wiringPi-based unlocker
+# lock_pin - which pin needs to be pulled high to disengage the lock
+[UnlockerWiringPi]
+lock_pin = 18

brmdoor_nfc_daemon.py

@@ -10,6 +10,7 @@ from binascii import hexlify
 
 from brmdoor_nfc import NFCDevice, NFCError
 from brmdoor_authenticator import UidAuthenticator
+import unlocker
 
 class BrmdoorConfigError(ConfigParser.Error):
 	"""
@@ -43,6 +44,7 @@ class BrmdoorConfig(object):
 		self.unknownUidTimeoutSecs = self.config.getint("brmdoor", "unknown_uid_timeout_secs")
 		self.logFile = self.config.get("brmdoor", "log_file")
 		self.logLevel = self.convertLoglevel(self.config.get("brmdoor", "log_level"))
+		self.unlocker = self.config.get("brmdoor", "unlocker")
 	
 	def convertLoglevel(self, levelString):
 		"""Converts string 'debug', 'info', etc. into corresponding
@@ -65,6 +67,10 @@ class NFCScanner(object):
 		self.unknownUidTimeoutSecs = config.unknownUidTimeoutSecs
 		self.lockOpenedSecs = config.lockOpenedSecs
 		
+		unlockerClassName = config.unlocker
+		unlockerClass = getattr(unlocker, unlockerClassName)
+		self.unlocker = unlockerClass(config)
+
 	def run(self):
 		"""
 		Waits for a card to get into reader field. Reads its UID and
@@ -107,7 +113,7 @@ class NFCScanner(object):
 			return
 		
 		logging.info("Unlocking for UID %s", record)
-		time.sleep(self.lockOpenedSecs)
+		self.unlocker.unlock()
 
 
 if __name__  == "__main__":
@@ -125,6 +131,6 @@ if __name__  == "__main__":
 		logging.basicConfig(filename=config.logFile, level=config.logLevel,
 			format="%(asctime)s %(levelname)s %(message)s [%(pathname)s:%(lineno)d]")
 	
-	nfcUnlocker = NFCUnlocker(config)
+	nfcScanner = NFCScanner(config)
-	nfcUnlocker.run()
+	nfcScanner.run()
 	

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)