# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.


"""The Finger User Information Protocol (RFC 1288)"""

from twisted.protocols import basic

class Finger(basic.LineReceiver):

def lineReceived(self, line):
parts = line.split()
if not parts:
parts = ['']
if len(parts) == 1:
slash_w = 0
else:
slash_w = 1
user = parts[-1]
if '@' in user:
host_place = user.rfind('@')
user = user[:host_place]
host = user[host_place+1:]
return self.forwardQuery(slash_w, user, host)
if user:
return self.getUser(slash_w, user)
else:
return self.getDomain(slash_w)

def _refuseMessage(self, message):
self.transport.write(message+"\n")
self.transport.loseConnection()

def forwardQuery(self, slash_w, user, host):
self._refuseMessage('Finger forwarding service denied')

def getDomain(self, slash_w):
self._refuseMessage('Finger online list denied')

def getUser(self, slash_w, user):
self.transport.write('Login: '+user+'\n')
self._refuseMessage('No such user')