import socket
import select
MAX_CLIENTS = 7
ALLOWED_CLIENTS = []

class world_server:
    def __init__(self, port=2200):
        """Prepares a basic server"""
        self.port = port
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.sock.bind((socket.gethostname(), port))
        self.sock.listen(7)
    def string_listen(self):
        """Listens through ALLOWED_CLIENTS, and returns messages"""
        (a1,a2,e1) = select.select(ALLOWED_CLIENTS, ALLOWED_CLIENTS, [], 20)
        for x in a1:
            cow = x(0).recv(10)
            cow = cow.decode()
            if "" != cow and (x in a2):
                x(0).send(b'goodbye*')
    def permit(self):
        """Allows clients to get on list"""
        if MAX_CLIENTS >= len(ALLOWED_CLIENTS):
            "There's no space, client should know"
            (sfail, address) = self.sock.accept()
            sfail.send(b'No room here.*')
            sfail.close()
        else:
            (spass, address) = self.sock.accept()
            ALLOWED_CLIENTS.append((spass, address))