4 import sqlalchemy.sql.functions as sfunc
5 from datetime import timedelta
6 from sqlalchemy.orm import mapper
7 from sqlalchemy.orm import scoped_session
8 from sqlalchemy.orm import sessionmaker
9 from sqlalchemy.ext.declarative import declarative_base
10 from xonstat.elo import KREDUCTION, ELOPARMS
11 from xonstat.util import strip_colors, html_colors, pretty_date
13 log = logging.getLogger(__name__)
15 DBSession = scoped_session(sessionmaker())
16 Base = declarative_base()
18 # define objects for all tables
20 def nick_html_colors(self):
22 return "Anonymous Player"
24 return html_colors(self.nick)
26 def nick_strip_colors(self):
28 return "Anonymous Player"
30 return strip_colors(self.nick)
32 def joined_pretty_date(self):
33 return pretty_date(self.create_dt)
36 return "<Player(%s, %s)>" % (self.player_id,
37 self.nick.encode('utf-8'))
40 class GameType(object):
42 return "<GameType(%s, %s, %s)>" % (self.game_type_cd, self.descr,
48 return "<Weapon(%s, %s, %s)>" % (self.weapon_cd, self.descr,
53 def __init__(self, name=None, hashkey=None, ip_addr=None):
55 self.hashkey = hashkey
56 self.ip_addr = ip_addr
59 return "<Server(%s, %s)>" % (self.server_id, self.name.encode('utf-8'))
63 def __init__(self, name=None):
67 return "<Map(%s, %s, %s)>" % (self.map_id, self.name, self.version)
71 def __init__(self, game_id=None, start_dt=None, game_type_cd=None,
72 server_id=None, map_id=None, winner=None):
73 self.game_id = game_id
74 self.start_dt = start_dt
75 self.game_type_cd = game_type_cd
76 self.server_id = server_id
81 return "<Game(%s, %s, %s, %s)>" % (self.game_id, self.start_dt,
82 self.game_type_cd, self.server_id)
85 return pretty_date(self.start_dt)
87 def process_elos(self, session, game_type_cd=None):
88 if game_type_cd is None:
89 game_type_cd = self.game_type_cd
91 # we do not have the actual duration of the game, so use the
92 # maximum alivetime of the players instead
94 for d in session.query(sfunc.max(PlayerGameStat.alivetime)).\
95 filter(PlayerGameStat.game_id==self.game_id).\
101 for (p,s,a) in session.query(PlayerGameStat.player_id,
102 PlayerGameStat.score, PlayerGameStat.alivetime).\
103 filter(PlayerGameStat.game_id==self.game_id).\
104 filter(PlayerGameStat.alivetime > timedelta(seconds=0)).\
105 filter(PlayerGameStat.player_id > 2).\
107 # scores are per second
108 scores[p] = s/float(a.seconds)
109 alivetimes[p] = a.seconds
111 player_ids = scores.keys()
114 for e in session.query(PlayerElo).\
115 filter(PlayerElo.player_id.in_(player_ids)).\
116 filter(PlayerElo.game_type_cd==game_type_cd).all():
117 elos[e.player_id] = e
119 # ensure that all player_ids have an elo record
120 for pid in player_ids:
121 if pid not in elos.keys():
122 elos[pid] = PlayerElo(pid, game_type_cd)
124 for pid in player_ids:
125 elos[pid].k = KREDUCTION.eval(elos[pid].games, alivetimes[pid],
132 elos = self.update_elos(elos, scores, ELOPARMS)
134 # add the elos to the session for committing
138 if game_type_cd == 'duel':
139 self.process_elos(session, "dm")
141 def update_elos(self, elos, scores, ep):
143 for pid in elos.keys():
151 for i in xrange(0, len(pids)):
153 for j in xrange(i+1, len(pids)):
155 si = scores[ei.player_id]
156 sj = scores[ej.player_id]
163 si, sj = 1, 1 # a draw
166 scorefactor_real = si / float(si + sj)
168 # estimated score factor by elo
169 elodiff = min(ep.maxlogdistance, max(-ep.maxlogdistance,
170 (float(ei.elo) - float(ej.elo)) * ep.logdistancefactor))
171 scorefactor_elo = 1 / (1 + math.exp(-elodiff))
173 # how much adjustment is good?
174 # scorefactor(elodiff) = 1 / (1 + e^(-elodiff * logdistancefactor))
175 # elodiff(scorefactor) = -ln(1/scorefactor - 1) / logdistancefactor
176 # elodiff'(scorefactor) = 1 / ((scorefactor) (1 - scorefactor) logdistancefactor)
177 # elodiff'(scorefactor) >= 4 / logdistancefactor
179 # adjust'(scorefactor) = K1 + K2
182 # K1 + K2 <= 4 / logdistancefactor <= elodiff'(scorefactor)
183 # as we then don't overcompensate
185 adjustment = scorefactor_real - scorefactor_elo
186 eloadjust[ei.player_id] += adjustment
187 eloadjust[ej.player_id] -= adjustment
189 elos[pid].elo = max(float(elos[pid].elo) + eloadjust[pid] * elos[pid].k * ep.global_K / float(len(elos) - 1), ep.floor)
194 class PlayerGameStat(object):
195 def __init__(self, player_game_stat_id=None, create_dt=None):
196 self.player_game_stat_id = player_game_stat_id
197 self.create_dt = create_dt
200 return "<PlayerGameStat(%s, %s, %s)>" \
201 % (self.player_id, self.game_id, self.create_dt)
203 def nick_stripped(self):
204 if self.nick is None:
205 return "Anonymous Player"
207 return strip_colors(self.nick)
209 def nick_html_colors(self):
210 if self.nick is None:
211 return "Anonymous Player"
213 return html_colors(self.nick)
215 def team_html_color(self):
228 class Achievement(object):
230 return "<Achievement(%s, %s, %s)>" % (self.achievement_cd, self.descr,
234 class PlayerAchievement(object):
236 return "<PlayerAchievement(%s, %s)>" % (self.player_id, self.achievement_cd)
239 class PlayerWeaponStat(object):
241 return "<PlayerWeaponStat(%s, %s, %s)>" % (self.player_weapon_stats_id,
242 self.player_id, self.game_id)
245 class Hashkey(object):
246 def __init__(self, player_id=None, hashkey=None):
247 self.player_id = player_id
248 self.hashkey = hashkey
251 return "<Hashkey(%s, %s)>" % (self.player_id, self.hashkey)
254 class PlayerNick(object):
256 return "<PlayerNick(%s, %s)>" % (self.player_id, self.stripped_nick)
259 class PlayerElo(object):
260 def __init__(self, player_id=None, game_type_cd=None):
262 self.player_id = player_id
263 self.game_type_cd = game_type_cd
266 self.elo = ELOPARMS.initial
269 return "<PlayerElo(pid=%s, gametype=%s, elo=%s)>" % \
270 (self.player_id, self.game_type_cd, self.elo)
273 class PlayerRank(object):
275 def nick_html_colors(self):
276 if self.nick is None:
277 return "Anonymous Player"
279 return html_colors(self.nick)
283 return "<PlayerRank(pid=%s, gametype=%s, rank=%s)>" % \
284 (self.player_id, self.game_type_cd, self.rank)
287 def initialize_db(engine=None):
288 DBSession.configure(bind=engine)
289 Base.metadata.bind = engine
290 Base.metadata.create_all(engine)
291 MetaData = sqlalchemy.MetaData(bind=engine, reflect=True)
293 # assign all those tables to an object
294 achievements_table = MetaData.tables['achievements']
295 cd_achievement_table = MetaData.tables['cd_achievement']
296 cd_game_type_table = MetaData.tables['cd_game_type']
297 cd_weapon_table = MetaData.tables['cd_weapon']
298 db_version_table = MetaData.tables['db_version']
299 games_table = MetaData.tables['games']
300 hashkeys_table = MetaData.tables['hashkeys']
301 maps_table = MetaData.tables['maps']
302 player_game_stats_table = MetaData.tables['player_game_stats']
303 players_table = MetaData.tables['players']
304 player_weapon_stats_table = MetaData.tables['player_weapon_stats']
305 servers_table = MetaData.tables['servers']
306 player_nicks_table = MetaData.tables['player_nicks']
307 player_elos_table = MetaData.tables['player_elos']
308 player_ranks_table = MetaData.tables['player_ranks']
310 # now map the tables and the objects together
311 mapper(PlayerAchievement, achievements_table)
312 mapper(Achievement, cd_achievement_table)
313 mapper(GameType, cd_game_type_table)
314 mapper(Weapon, cd_weapon_table)
315 mapper(Game, games_table)
316 mapper(Hashkey, hashkeys_table)
317 mapper(Map, maps_table)
318 mapper(PlayerGameStat, player_game_stats_table)
319 mapper(Player, players_table)
320 mapper(PlayerWeaponStat, player_weapon_stats_table)
321 mapper(Server, servers_table)
322 mapper(PlayerNick, player_nicks_table)
323 mapper(PlayerElo, player_elos_table)
324 mapper(PlayerRank, player_ranks_table)