# Fix asymmetry
from twisted.application import service, strports
from twisted.internet import protocol, reactor, defer
from twisted.protocols import basic

class FingerProtocol(basic.LineReceiver):
    def lineReceived(self, user):
        d = self.factory.getUser(user)

        def onError(err):
            return b'Internal error in server'
        d.addErrback(onError)

        def writeResponse(message):
            self.transport.write(message + b'\r\n')
            self.transport.loseConnection()
        d.addCallback(writeResponse)

class FingerSetterProtocol(basic.LineReceiver):
    def connectionMade(self):
        self.lines = []

    def lineReceived(self, line):
        self.lines.append(line)

    def connectionLost(self,reason):
        user = self.lines[0]
        status = self.lines[1]
        self.factory.setUser(user, status)

class FingerService(service.Service):
    def __init__(self, users):
        self.users = users

    def getUser(self, user):
        return defer.succeed(self.users.get(user, b"No such user"))

    def setUser(self, user, status):
        self.users[user] = status

    def getFingerFactory(self):
        f = protocol.ServerFactory()
        f.protocol = FingerProtocol
        f.getUser = self.getUser
        return f

    def getFingerSetterFactory(self):
        f = protocol.ServerFactory()
        f.protocol = FingerSetterProtocol
        f.setUser = self.setUser
        return f

application = service.Application('finger', uid=1, gid=1)
f = FingerService({b'moshez': b'Happy and well'})
serviceCollection = service.IServiceCollection(application)
strports.service("tcp:79", f.getFingerFactory()
                   ).setServiceParent(serviceCollection)
strports.service("tcp:1079", f.getFingerSetterFactory()
                   ).setServiceParent(serviceCollection)