seopardy/buttonreader.py

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2015-08-19 11:20:51 +02:00
# Licensed under GPLv3
# Written by Sebastian Lohff (seba@someserver.de)
# http://seba-geek.de/projects/seopardy/
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from __future__ import print_function
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import os
import serial
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import socket
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from PySide import QtCore
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_inputs = {}
def _add_input(inputType, inputClass):
global _inputs
_inputs[inputType] = inputClass
def get_input(inputType, args, app):
global _inputs
if inputType not in _inputs:
raise ValueError("'%s' is an unknown input type" % inputType)
return _inputs[inputType](app, *args)
class BaseInput(QtCore.QThread):
buttonEvent = QtCore.Signal(int)
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def __init__(self, app, parent=None):
super(BaseInput, self).__init__(parent)
self._app = app
def _sendButtonEvent(self, btn):
self.buttonEvent.emit(int(btn))
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@QtCore.Slot(bool)
def buzzersOpen(self, isOpen):
""" Called when buzzers are opened or closed for answering
isOpen - True if question got opened, False if closed
"""
#print("Buzzers are now " + ("open" if isOpen else "closed"))
pass
@QtCore.Slot(int)
def playerGotQuestion(self, playerNo):
""" Called when a player got its turn to answer the question
playerNo - number (int) of player which can answer (starting from 1)
"""
#print("player %d can answer now" % playerNo)
pass
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class SerialInput(BaseInput):
def __init__(self, app, device, baudrate=9600, bytesize=8, parity='N', stopbits=1):
super(SerialInput, self).__init__(app)
try:
self._serial = serial.Serial(device, baudrate, bytesize, parity, stopbits)
except serial.SerialException as e:
raise InputException("Error: %s" % e)
print(" >> serial %s initialized with rate %s %s%s%s" % (device, baudrate, bytesize, parity, stopbits))
def run(self):
while True:
c = self._serial.read(1)
if len(c) == 1 and ord(c) > ord('0') and ord(c) <= ord('9'):
self._sendButtonEvent(c)
_add_input("Serial", SerialInput)
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class BeopardySerialInput(BaseInput):
def __init__(self, app, device, baudrate=9600, bytesize=8, parity='N', stopbits=1):
super(BeopardySerialInput, self).__init__(app)
try:
self._serial = serial.Serial(device, baudrate, bytesize, parity, stopbits)
except serial.SerialException as e:
raise InputException("Error: %s" % e)
# playerDict
self._playerDict = {
'a': 1,
'b': 2,
'c': 3,
'd': 4,
}
print(" >> serial %s initialized with rate %s %s%s%s" % (device, baudrate, bytesize, parity, stopbits))
def run(self):
while True:
c = self._serial.read(1)
#print("serial: read ", c)
if len(c) == 1 and c in self._playerDict:
#print("sending button event ", c, " ", self._playerDict[c])
self._sendButtonEvent(self._playerDict[c])
@QtCore.Slot(bool)
def buzzersOpen(self, isOpen):
self._serial.write("ABCD")
#print("serial: ABCD")
if isOpen:
# buzzers are open now
self._serial.write("R")
#print("serial: R")
else:
# tell them that buttons are closed now
self._serial.write("r")
#print("serial: r")
@QtCore.Slot(int)
def playerGotQuestion(self, playerNo):
if not (playerNo >= 1 and playerNo <= 4):
return
self._serial.write(chr(ord('a') + (playerNo-1)))
#print("serial: ", chr(ord('a') + (playerNo-1)))
_add_input("BeopardySerial", BeopardySerialInput)
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class FifoInput(BaseInput):
def __init__(self, app, fifoPath, debug=False):
super(FifoInput, self).__init__(app)
self._path = fifoPath
self._debug = debug
if not os.path.exists(self._path):
try:
os.mkfifo(self._path)
except OSError as e:
raise InputException("Could not create fifo '%s': %s" % (self._path, e))
if os.path.isfile(self._path) or os.path.isdir(self._path):
raise InputException("Fifo '%s' is not a fifo" % self._path)
print(" >> Fifo initialized, using '%s'" % self._path)
def run(self):
fifo = open(self._path)
while True:
c = fifo.read(1)
if len(c) == 1 and ord(c) > ord('0') and ord(c) <= ord('9'):
self._sendButtonEvent(c)
_add_input("Fifo", FifoInput)
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class UnixInput(BaseInput):
def __init__(self, app, socketPath, debug=False):
super(UnixInput, self).__init__(app)
self._path = socketPath
self._debug = debug
self._currConn = None
try:
os.unlink(self._path)
except OSError as e:
if os.path.exists(self._path):
raise InputException("Could not create domain socket '%s': %s" % (self._path, e))
self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
self.sock.bind(self._path)
print(" >> Unix domain socket initialized, using '%s'" % self._path)
def run(self):
self.sock.listen(1)
while True:
self._currConn, cli = self.sock.accept()
try:
while True:
c = self._currConn.recv(1)
if c == '':
break
if len(c) == 1 and ord(c) > ord('0') and ord(c) <= ord('9'):
self._sendButtonEvent(c)
finally:
self._currConn.close()
self._currConn = None
@QtCore.Slot(bool)
def buzzersOpen(self, isOpen):
if self._currConn:
if isOpen:
self._currConn.send("O")
else:
self._currConn.send("C")
@QtCore.Slot(int)
def playerGotQuestion(self, playerNo):
if self._currConn:
self._currConn.send("T%d" % playerNo)
_add_input("Unix", UnixInput)
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class InputException(Exception):
pass