def proc_input(client):
    msg = client.get_command()

    ### GAME state
    if client.state == STATE_GAME:
        proc_command(broadcast, client, msg)

    ### LOGIN state
    elif client.state == STATE_LOGIN:
        try:
            u = User.objects.get(username__exact=msg)
        except:
            u = None
        if u:
            client.user = u
            client.player.name = msg
            client.send('password: ')
            client.state = STATE_PASS
        else:
            client.user = User(username=msg)
            client.player.name = msg
            client.state = STATE_SPASS
            client.send('New user.')
            client.send('new password: ')

    ### PASS state
    elif client.state == STATE_PASS:
        if len(msg):
            if client.user.check_password(msg):
                client.send('Entering game!\n')
                client.state = STATE_GAME
                look(client)

    ### NEW_PASS state
    elif client.state == STATE_SPASS:
        if len(msg):
            client.user.set_password(msg)
            client.user.save()
            client.state = STATE_GAME
            look(client)
        else:
            client.send('new password: ')