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main.py
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main.py
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import re
import os
import gzip
import time
import errno
import eventlet
import simplejson as json
import random
import subprocess
from collections import OrderedDict
from eventlet.green import socket
import redis
from engine import Engine
redis_url = os.environ.get('REDIS_URL') or 'localhost'
redis = redis.Redis(host=redis_url)
pool = eventlet.GreenPool()
COMMAND_DEADLINE = 6
MAX_ROUNDS = 500
START_ELO = 1000
MATCHMAKING_INTERVAL = 1
redis.ping()
class Authenticator(object):
def check(self, username, password):
saved_password = redis.get("user:%s" % username)
if not saved_password:
if len(username) > 20:
return False
redis.set("user:%s" % username, password)
return True
return saved_password == password
Authenticator = Authenticator()
class Scoreboard(object):
def update_victory(self, winner, loser):
return self.update_elo(winner, loser, 1.0, 0.0)
def update_draw(self, player1, player2):
return self.update_elo(player1, player2, 0.5, 0.5)
def update_elo(self, p_a, p_b, score_a, score_b):
Ra = redis.zscore('elo', p_a) or START_ELO
Rb = redis.zscore('elo', p_b) or START_ELO
Ea = 1.0 / (1 + 10.0 ** ((Rb - Ra)/400.0))
Eb = 1.0 / (1 + 10.0 ** ((Ra - Rb)/400.0))
Ra_new = Ra + 10 * (score_a - Ea)
Rb_new = Rb + 10 * (score_b - Eb)
redis.zadd('elo', {p_a: Ra_new})
redis.zadd('elo', {p_b: Rb_new})
return Ra_new, Rb_new, Ra_new - Ra
def get_score(self, player):
return redis.zscore('elo', player) or START_ELO
Scoreboard = Scoreboard()
class Player(object):
def __init__(self, conn, username):
self.conn = conn
self.username = username
self.cmd_issued = False
self.game = None
self.player_id = None
def get_score(self):
return Scoreboard.get_score(self.username)
def send(self, msg):
if self.conn:
self.conn.send(msg)
def connection_lost(self):
if self.game and not self.game.game_over:
self.disqualify("connection lost")
else:
self.conn.disconnect()
def disqualify(self, reason):
print "player %r disqualified: %s" % (self, reason)
other_player = self.game.other_player(self)
self.game.game_end(
other_player.player_id,
"player %d disqualified: %s" % (self.player_id, reason)
)
def cmd_nop(self):
# print "player %r nop" % self
if self.game.game_over:
self.send("game is over. please disconnect")
return
if self.cmd_issued:
self.disqualify("sent more than one command")
return
self.cmd_issued = True
self.send("command received. waiting for other player...")
self.game.check_round_finished()
def cmd_send_fleet(self, origin_id, target_id, a, b, c):
# print "player %r fleet %d->%d (%d,%d,%d = %d)" % (self, origin_id, target_id, a, b, c, a+b+c)
if self.game.game_over:
self.send("game is over. please disconnect")
return
if self.cmd_issued:
self.disqualify("sent more than one command")
return
self.cmd_issued = True
self.send("command received. waiting for other player...")
self.game.engine.send_fleet(self.player_id, origin_id, target_id, [a,b,c])
self.game.check_round_finished()
def __repr__(self):
return "<Player %s>" % (self.username)
class Game(object):
def __init__(self, players):
assert len(players) == 2
self.game_id = redis.incr('game_id')
print "starting game %r" % self.game_id
self.game_log_name = "log/%08d/%04d.json" % (self.game_id / 1000, self.game_id % 1000)
try:
os.makedirs(os.path.dirname(self.game_log_name))
except OSError, err:
if err.errno != errno.EEXIST:
raise
self.game_log = file(self.game_log_name, "wb")
self.players = players
self.game_over = False
self.winner = None
for idx, player in enumerate(self.players):
player.game = self
player.player_id = idx + 1
for player in self.players:
player.send("game %d starts. other player is %s" % (self.game_id, self.other_player(player).username))
self.engine = Engine(max_rounds=MAX_ROUNDS)
self.send_state()
self.deadline = eventlet.greenthread.spawn_after(COMMAND_DEADLINE, self.deadline_reached)
p = redis.pipeline()
p.hset('game:%d' % self.game_id, 'p1', self.players[0].username)
p.hset('game:%d' % self.game_id, 'p2', self.players[1].username)
p.rpush('games', self.game_id)
p.rpush('player:%s:games' % self.players[0].username, self.game_id)
p.rpush('player:%s:games' % self.players[1].username, self.game_id)
p.execute()
def other_player(self, player):
return self.players[1 - self.players.index(player)]
def has_player(self, player):
return player in self.players
def game_end(self, winner, reason):
assert not self.game_over
print "game ends: winner is %s: %s" % (winner, reason)
if self.deadline is not None:
self.deadline.cancel()
self.deadline = None
self.game_over = True
self.winner = winner
if winner is None:
elo_p1, elo_p2, elo_diff = Scoreboard.update_draw(
self.players[0].username,
self.players[1].username
)
elif winner == 1:
elo_p1, elo_p2, elo_diff = Scoreboard.update_victory(
self.players[0].username,
self.players[1].username
)
else:
elo_p2, elo_p1, elo_diff = Scoreboard.update_victory(
self.players[1].username,
self.players[0].username
)
elo_diff = - elo_diff
self.players[0].send("game ended: %s, %.2f ELO for you. final state follows" % (reason, elo_diff))
self.players[1].send("game ended: %s, %.2f ELO for you. final state follows" % (reason, -elo_diff))
self.send_state()
for player in self.players:
player.send("This game is now available at http://spacegoo.gpn.entropia.de/game/%d" % self.game_id)
self.game_log.close()
# This unlinks the gziped file after compressing
subprocess.call(["gzip", "-f", self.game_log_name])
p = redis.pipeline()
p.hset('game:%d' % self.game_id, 'end', int(time.time()))
p.hset('game:%d' % self.game_id, 'elodiff', elo_diff)
p.zadd('scoreboard', {self.players[0].username: -elo_p1})
p.zadd('scoreboard', {self.players[1].username: -elo_p2})
p.execute()
def disconnect():
self.players[0].conn.disconnect()
self.players[1].conn.disconnect()
eventlet.greenthread.spawn_after(1, disconnect)
def check_round_finished(self):
# pruefen, ob beide spieler befehle abgegeben haben...
for player in self.players:
if not player.cmd_issued:
return
self.deadline.cancel() # abort deadline countdown
self.deadline = None
for player in self.players:
player.send("calculating round")
self.engine.do_round()
if self.engine.winner is not None:
if self.engine.winner == "draw":
self.game_end(
None,
"game is a draw"
)
else:
self.game_end(
self.engine.winner,
"player %d won" % self.engine.winner
)
return
self.send_state()
for player in self.players:
player.send("waiting for you command")
self.deadline = eventlet.greenthread.spawn_after(COMMAND_DEADLINE, self.deadline_reached)
for player in self.players:
player.cmd_issued = False
def deadline_reached(self):
if not self.players[0].cmd_issued and not self.players[1].cmd_issued:
self.game_end(
None,
"both players failed to send a command"
)
else:
for player in self.players:
if not player.cmd_issued:
player.disqualify("no command sent")
def get_player_state(self, for_player):
state = self.engine.dump()
state['player_id'] = for_player.player_id
state['game_over'] = self.game_over
state['winner'] = self.winner
state['players'] = [
OrderedDict([
('id', player.player_id),
('name', player.username),
('itsme', player == for_player),
]) for player in self.players
]
return state
def get_log_state(self):
state = self.engine.dump()
state['game_over'] = self.game_over
state['winner'] = self.winner
state['players'] = [
OrderedDict([
('id', player.player_id),
('name', player.username),
]) for player in self.players
]
return state
def send_state(self):
for player in self.players:
player.send(json.dumps(self.get_player_state(player)))
self.game_log.write(json.dumps(self.get_log_state()))
self.game_log.write("\n")
self.game_log.flush()
class MatchMaking(object):
def __init__(self):
self.lobby = []
def add_player(self, player):
self.lobby.append(player)
def remove_player(self, player):
if player in self.lobby:
self.lobby.remove(player)
def check_should_game_start(self):
pairing = []
for player in self.lobby:
pairing.append((player.get_score(), player))
pairing.sort()
while len(pairing) >= 2:
first_idx = random.randint(0, len(pairing)-1)
while 1:
second_idx = int(random.gauss(first_idx, 2))
second_idx = max(0, min(len(pairing) - 1, second_idx))
if second_idx != first_idx:
break
if first_idx > second_idx:
first_idx, second_idx = second_idx, first_idx
(elo1, player1), (elo2, player2) = pairing.pop(second_idx), pairing.pop(first_idx)
print "sending %s (%f) and %s (%f) into game" % (
player1, elo1, player2, elo2)
Game([player1, player2])
# uebriggebliebenen Spieler ist nun die neue Lobby
self.lobby = [player for _, player in pairing]
def dump(self):
print "%d player in lobby" % len(self.lobby)
MatchMaking = MatchMaking()
class Connection(object):
def __init__(self, socket):
self.socket = socket
self.read_file = socket.makefile('r')
self.write_queue = eventlet.queue.Queue()
self.player = None
self.reader_thread = pool.spawn(self.reader)
pool.spawn_n(self.writer)
def handle_cmd_login(self, username, password):
if self.player:
self.send("already logged in")
return
if not Authenticator.check(username, password):
self.send("invalid login")
return
self.player = Player(self, username)
self.send("your current score: %.2f. waiting for game start..." % self.player.get_score())
MatchMaking.add_player(self.player)
def handle_cmd_send(self, origin_id, target_id, a, b, c):
if self.player is None:
self.send("login first")
return
if self.player.game is None:
self.send("not in a game. please wait")
return
try:
origin_id, target_id, a, b, c = int(origin_id), int(target_id), int(a), int(b), int(c)
except ValueError:
self.send("numbers expected")
return
self.player.cmd_send_fleet(origin_id, target_id, a, b, c)
def handle_cmd_nop(self):
if self.player is None:
self.send("login first")
return
if self.player.game is None:
self.send("not in a game. please wait")
return
self.player.cmd_nop()
def handle_cmd_quit(self):
self.disconnect()
def handle_connection_lost(self):
if self.player:
MatchMaking.remove_player(self.player)
self.player.connection_lost()
else:
self.disconnect()
def disconnect(self):
self.send("closing connection. see you next time")
self.write_queue.put(None) # signal eof to writer
print "reader closed"
self.read_file.close()
self.reader_thread.kill()
# no code here: the kill might prevent this from being reached
def send(self, msg):
self.write_queue.put(msg + "\n")
def read_tokens(self):
line = self.read_file.readline().strip()
if not line: # eof
return None
if not re.match("^[a-z 0-9A-Z_\-]*$", line):
self.send("Invalid data received. Valid bytes: [a-z 0-9A-Z_\-]")
return None
return [token.strip().lower() for token in line.split() if token]
def reader(self):
while 1:
tokens = self.read_tokens()
if tokens is None:
self.handle_connection_lost()
return # never reached. this thread is killed
elif not tokens: # empty?
continue
cmd, args = tokens[0], tokens[1:]
handler = getattr(self, "handle_cmd_%s" % cmd, None)
if handler is None:
self.send("unknown command: %r" % cmd)
else:
try:
handler(*args)
except TypeError, err:
self.send("invalid arguments: %s" % err)
def writer(self):
while 1:
data = self.write_queue.get()
if data is None: # should close write side
break
try:
self.socket.send(data)
except socket.error:
break
print "writer closed"
try:
self.socket.shutdown(socket.SHUT_WR)
except socket.error:
pass
self.socket.close()
def __repr__(self):
return "<Connection: %r>" % (self.player,)
def status():
while 1:
eventlet.greenthread.sleep(2)
MatchMaking.dump()
def check_match():
while 1:
eventlet.greenthread.sleep(MATCHMAKING_INTERVAL)
MatchMaking.check_should_game_start()
def main():
server = eventlet.listen(('0.0.0.0', 6000))
pool.spawn_n(status)
pool.spawn_n(check_match)
while 1:
try:
socket, address = server.accept()
conn = Connection(socket)
conn.send("welcome to rocket-paper-spacegoo. see https://github.com/qr4/rocket-paper-spacegoo for more information on how to play")
except (SystemExit, KeyboardInterrupt):
break
if __name__ == "__main__":
main()