def __init__(self):
self.__obs = Observable()
conf = Configuration()
self.__rfid = RfidReader(conf.rfid.serialPort)
self.__acceptor = CoinAcceptor(conf.coinAcceptor.serialPort, conf.coinAcceptor.inhibitPin, conf.coinMap)
self.__memberService = MemberService(conf.db.username, conf.db.password, conf.db.hostname, conf.db.port, conf.db.database)
self.__popMachine = PopMachine(conf.popMachine.relayPin)
self.__webService = WebService(conf.web.bindAddress, conf.web.port)
self.__acceptor.inhibit(True)
self.__popCost = self.__popMachine.getPopCost()
self.__obs.on("CardSwiped", self.__onCardRead)
self.__obs.on("CoinAccepted", self.__onCoinAccepted)
self.__obs.on("MemberNotFound", self.__onMemberNotFound)
self.__obs.on("PopPaid", self.__onPopPaid)
self.__obs.on("CreditCompleted", self.__onCreditCompleted)
self.__creditOnlyPin = conf.general.creditOnlyPin
GPIO.setup(self.__creditOnlyPin, GPIO.IN)
class PopPi:
# Main application for pop machine
# State information
__acceptingFob = False
__acceptingFunds = False
__creditOnlyMode = False
__lastCreditButtonState = 0
__memberFob = None
__memberCredit = None
__deposited = None
__popCost = None
def __init__(self):
self.__obs = Observable()
conf = Configuration()
self.__rfid = RfidReader(conf.rfid.serialPort)
self.__acceptor = CoinAcceptor(conf.coinAcceptor.serialPort, conf.coinAcceptor.inhibitPin, conf.coinMap)
self.__memberService = MemberService(conf.db.username, conf.db.password, conf.db.hostname, conf.db.port, conf.db.database)
self.__popMachine = PopMachine(conf.popMachine.relayPin)
self.__webService = WebService(conf.web.bindAddress, conf.web.port)
self.__acceptor.inhibit(True)
self.__popCost = self.__popMachine.getPopCost()
self.__obs.on("CardSwiped", self.__onCardRead)
self.__obs.on("CoinAccepted", self.__onCoinAccepted)
self.__obs.on("MemberNotFound", self.__onMemberNotFound)
self.__obs.on("PopPaid", self.__onPopPaid)
self.__obs.on("CreditCompleted", self.__onCreditCompleted)
self.__creditOnlyPin = conf.general.creditOnlyPin
GPIO.setup(self.__creditOnlyPin, GPIO.IN)
def start(self):
self.__fobThread = threading.Thread(target=self.__readCardThread)
self.__fobThread.daemon = True
self.__fobThread.start()
self.__coinThread = threading.Thread(target=self.__readCoinThread)
self.__coinThread.daemon = True
self.__coinThread.start()
self.__creditOnlyThread = threading.Thread(target=self.__readCreditOnlyButton)
self.__creditOnlyThread.daemon = True
self.__creditOnlyThread.start()
self.__resetStates()
self.__acceptingFob = True
def stop(self):
if not self.__rfid is None:
self.__rfid.shutdown()
if not self.__acceptor is None:
self.__acceptor.shutdown()
if not self.__memberService is None:
self.__memberService.shutdown()
if not self.__popMachine is None:
self.__popMachine.shutdown()
if not self.__webService is None:
self.__webService.shutdown()
def __onCardRead(self, card):
if not self.__acceptingFob:
print("Fob swiped while not accepting fobs: Ignoring fob " + str(card))
return
self.__acceptingFob = False
self.__webService.onSwipeStart()
print("Fob " + str(card) + " swiped. Finding member...")
self.__memberCredit = self.__memberService.getCredit(card)
if self.__memberCredit is None:
self.__obs.trigger("MemberNotFound", card)
return
self.__memberFob = card
print("Member " + str(card) + " has " + str(self.__memberCredit) + " cents credit")
self.__acceptingFunds = True
self.__deposited = 0
self.__acceptor.inhibit(False)
self.__webService.onSwipe(self.__memberCredit, self.__popCost)
requiredFunds = self.__getRequiredFunds()
print("Member " + str(card) + " needs to supply " + str(requiredFunds) + " cents")
self.__checkRequiredFunds()
def __onCoinAccepted(self, coin):
if not self.__acceptingFunds:
print("Coin accepted while not accepting coins: Ignoring " + str(coin) + " cents")
return
self.__deposited += coin
self.__webService.onDeposit(coin)
print("Member inserted " + str(coin) + " cents")
self.__checkRequiredFunds()
def __onPopPaid(self):
self.__acceptor.inhibit(True)
self.__acceptingFunds = False
newCredit = (self.__memberCredit + self.__deposited) - self.__popCost
self.__memberService.setCredit(self.__memberFob, newCredit)
print("Member's new credit is " + str(newCredit) + " cents")
self.__webService.onPaid(newCredit)
self.__popMachine.awardPop()
print("Pop awarded to member")
self.__resetStates()
def __onCreditCompleted(self):
self.__acceptor.inhibit(True)
self.__acceptingFunds = False
newCredit = self.__memberCredit + self.__deposited
self.__memberService.setCredit(self.__memberFob, newCredit)
print("Member's new credit is " + str(newCredit) + " cents")
self.__webService.onCreditCompleted(newCredit)
self.__resetStates()
def __onMemberNotFound(self, card):
print("Member not found: " + str(card))
self.__resetStates()
self.__webService.onNotFound()
def __resetStates(self):
self.__acceptingFob = True
self.__acceptingFunds = False
self.__creditOnlyMode = False
self.__memberFob = None
self.__memberCredit = None
self.__deposited = None
self.__acceptor.inhibit(True)
print("Waiting for member")
def __checkRequiredFunds(self):
if self.__getRequiredFunds() <= 0 and not self.__creditOnlyMode:
self.__obs.trigger("PopPaid")
def __getRequiredFunds(self):
totalDeposit = self.__memberCredit + self.__deposited
return self.__popCost - totalDeposit
def __readCardThread(self):
while True:
card = self.__rfid.readCard()
self.__obs.trigger("CardSwiped", card)
def __readCoinThread(self):
while True:
coin = self.__acceptor.readCoin()
self.__obs.trigger("CoinAccepted", coin)
def __readCreditOnlyButton(self):
sleepTime = 0.1 # 100ms
while True:
pressed = GPIO.input(self.__creditOnlyPin)
if self.__lastCreditButtonState == pressed:
sleep(sleepTime)
continue # Ignore: Already handled this state
self.__lastCreditButtonState = pressed
if not self.__acceptingFunds:
sleep(sleepTime)
continue # Ignore button: Don't care about this state
if pressed == 1:
if not self.__creditOnlyMode:
self.__creditOnlyMode = True
self.__webService.onCreditOnly()
print("Member requested credit-only mode")
else:
print("Credit-only mode completed")
self.__obs.trigger("CreditCompleted")
sleep(sleepTime)