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import redis
import sys
import socket
r = redis.Redis()
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.connect(("8.8.8.8", 80))
host = s.getsockname()[0]
class PersonalError(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)
class Colors(object):
red = '\033[91m'
yellow = '\033[93m'
grey = '\033[90m'
black = '\033[0m'
bold = '\033[1m'
class Command(object):
info = {
"info" : "this is stout",
"set" : "set a value",
}
commands = {
'quit' : None,
'set' : ['user', 'host'],
'get' : None
}
@staticmethod
def err(err, info = ''):
if err == 'keyword':
sys.stderr.write(Colors.red + "keyword inesistente\n" + Colors.black)
elif err == 'wrong':
sys.stderr.write(Colors.red + "sintassi comando errata\n" + Colors.black)
elif err == 'personal':
sys.stderr.write(Colors.red + str(info) + "\n" + Colors.black)
else:
pass
class Stout(object):
def __init__(self):
self.name = 'stout'
self.user = Stout.username()
def getName(self):
word = " (" + self.name + ") "
if self.user == '':
return word
else:
return word + Colors.grey + "(" + self.user + ":" + host + ") "
@staticmethod
def username():
if r.hget('user:'+host, 'name') is not None:
return r.hget('user:'+host, 'name').decode("utf-8")
else:
return ''
@staticmethod
def userexist(name):
lista = r.zrange('usersname', 0, -1)
for i in lista:
if name == i.decode("utf-8"):
return True
else:
return False
def command(self, what, cmd):
if what == 'set':
try:
if cmd[1] == 'user' and cmd[2] is not None:
if len(cmd[2]) > 10: raise PersonalError("lunghezza maggiore del consetito. Max 10")
if Stout.userexist(cmd[2]) == True: raise PersonalError("questo nome utente esiste già")
if self.user != '': r.zrem('usersname', self.user)
self.user = cmd[2]
r.hset('user:'+host, 'name', self.user)
r.zadd('usersname', self.user, 0)
print("Ok")
elif cmd[1] is not Command.commands['set']:
raise IndexError
except IndexError:
Command.err('wrong')
except PersonalError as e:
Command.err('personal', e.value)
def action(self, cmd):
if cmd is None:
return None
else:
cmd = cmd.split()
count = len(cmd)
if (count == 1 or count == 2) and cmd[0] not in Command.commands:
try:
if cmd[0] == 'info' and count == 1:
print(Command.info['info'])
else:
print(Command.info[cmd[1]])
except (KeyError, IndexError):
Command.err('keyword')
else:
what = cmd[0]
if what in Command.commands:
self.command(what, cmd)
else:
Command.err('keyword')
if __name__ == '__main__':
app = Stout()
cmd = ''
while cmd != 'quit':
cmd = input(">" + Colors.yellow + app.getName() + Colors.black)
app.action(cmd)
r.save()
s.close()
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