xonstat/models.py

   1 import json
   2 import logging
   3 import math
   4 import sqlalchemy
   5 import sqlalchemy.sql.functions as sfunc
   6 from datetime import timedelta
   7 from sqlalchemy.orm import mapper
   8 from sqlalchemy.orm import scoped_session
   9 from sqlalchemy.orm import sessionmaker
  10 from sqlalchemy.ext.declarative import declarative_base
  11 from xonstat.elo import KREDUCTION, ELOPARMS
  12 from xonstat.util import strip_colors, html_colors, pretty_date
  13
  14 log = logging.getLogger(__name__)
  15
  16 DBSession = scoped_session(sessionmaker())
  17 Base = declarative_base()
  18
  19 # define objects for all tables
  20 class Player(object):
  21     def nick_html_colors(self):
  22         if self.nick is None:
  23             return "Anonymous Player"
  24         else:
  25             return html_colors(self.nick)
  26
  27     def nick_strip_colors(self):
  28         if self.nick is None:
  29             return "Anonymous Player"
  30         else:
  31             return strip_colors(self.nick)
  32
  33     def joined_pretty_date(self):
  34         return pretty_date(self.create_dt)
  35
  36     def __repr__(self):
  37         return "<Player(%s, %s)>" % (self.player_id,
  38                 self.nick.encode('utf-8'))
  39
  40
  41 class GameType(object):
  42     def __repr__(self):
  43         return "<GameType(%s, %s, %s)>" % (self.game_type_cd, self.descr,
  44                 self.active_ind)
  45
  46
  47 class Weapon(object):
  48     def __repr__(self):
  49         return "<Weapon(%s, %s, %s)>" % (self.weapon_cd, self.descr,
  50                 self.active_ind)
  51
  52
  53 class Server(object):
  54     def __init__(self, name=None, hashkey=None, ip_addr=None):
  55         self.name = name
  56         self.hashkey = hashkey
  57         self.ip_addr = ip_addr
  58
  59     def __repr__(self):
  60         return "<Server(%s, %s)>" % (self.server_id, self.name.encode('utf-8'))
  61
  62
  63 class Map(object):
  64     def __init__(self, name=None):
  65         self.name = name
  66
  67     def __repr__(self):
  68         return "<Map(%s, %s, %s)>" % (self.map_id, self.name, self.version)
  69
  70     def to_dict(self):
  71         return {'map_id':self.map_id, 'name':self.name}
  72
  73
  74 class Game(object):
  75     def __init__(self, game_id=None, start_dt=None, game_type_cd=None,
  76             server_id=None, map_id=None, winner=None):
  77         self.game_id = game_id
  78         self.start_dt = start_dt
  79         self.game_type_cd = game_type_cd
  80         self.server_id = server_id
  81         self.map_id = map_id
  82         self.winner = winner
  83
  84     def __repr__(self):
  85         return "<Game(%s, %s, %s, %s)>" % (self.game_id, self.start_dt,
  86                 self.game_type_cd, self.server_id)
  87
  88     def fuzzy_date(self):
  89         return pretty_date(self.start_dt)
  90
  91     def process_elos(self, session, game_type_cd=None):
  92         if game_type_cd is None:
  93             game_type_cd = self.game_type_cd
  94
  95         # we do not have the actual duration of the game, so use the
  96         # maximum alivetime of the players instead
  97         duration = 0
  98         for d in session.query(sfunc.max(PlayerGameStat.alivetime)).\
  99                     filter(PlayerGameStat.game_id==self.game_id).\
 100                     one():
 101             duration = d.seconds
 102
 103         scores = {}
 104         alivetimes = {}
 105         for (p,s,a) in session.query(PlayerGameStat.player_id,
 106                 PlayerGameStat.score, PlayerGameStat.alivetime).\
 107                 filter(PlayerGameStat.game_id==self.game_id).\
 108                 filter(PlayerGameStat.alivetime > timedelta(seconds=0)).\
 109                 filter(PlayerGameStat.player_id > 2).\
 110                 all():
 111                     # scores are per second
 112                     scores[p] = s/float(a.seconds)
 113                     alivetimes[p] = a.seconds
 114
 115         player_ids = scores.keys()
 116
 117         elos = {}
 118         for e in session.query(PlayerElo).\
 119                 filter(PlayerElo.player_id.in_(player_ids)).\
 120                 filter(PlayerElo.game_type_cd==game_type_cd).all():
 121                     elos[e.player_id] = e
 122
 123         # ensure that all player_ids have an elo record
 124         for pid in player_ids:
 125             if pid not in elos.keys():
 126                 elos[pid] = PlayerElo(pid, game_type_cd)
 127
 128         for pid in player_ids:
 129             elos[pid].k = KREDUCTION.eval(elos[pid].games, alivetimes[pid],
 130                     duration)
 131             if elos[pid].k == 0:
 132                 del(elos[pid])
 133                 del(scores[pid])
 134                 del(alivetimes[pid])
 135
 136         elos = self.update_elos(elos, scores, ELOPARMS)
 137
 138         # add the elos to the session for committing
 139         for e in elos:
 140             session.add(elos[e])
 141
 142         if game_type_cd == 'duel':
 143             self.process_elos(session, "dm")
 144
 145     def update_elos(self, elos, scores, ep):
 146         eloadjust = {}
 147         for pid in elos.keys():
 148             eloadjust[pid] = 0
 149
 150         if len(elos) < 2:
 151             return elos
 152
 153         pids = elos.keys()
 154
 155         for i in xrange(0, len(pids)):
 156             ei = elos[pids[i]]
 157             for j in xrange(i+1, len(pids)):
 158                 ej = elos[pids[j]]
 159                 si = scores[ei.player_id]
 160                 sj = scores[ej.player_id]
 161
 162                 # normalize scores
 163                 ofs = min(0, si, sj)
 164                 si -= ofs
 165                 sj -= ofs
 166                 if si + sj == 0:
 167                     si, sj = 1, 1 # a draw
 168
 169                 # real score factor
 170                 scorefactor_real = si / float(si + sj)
 171
 172                 # estimated score factor by elo
 173                 elodiff = min(ep.maxlogdistance, max(-ep.maxlogdistance,
 174                     (float(ei.elo) - float(ej.elo)) * ep.logdistancefactor))
 175                 scorefactor_elo = 1 / (1 + math.exp(-elodiff))
 176
 177                 # how much adjustment is good?
 178                 # scorefactor(elodiff) = 1 / (1 + e^(-elodiff * logdistancefactor))
 179                 # elodiff(scorefactor) = -ln(1/scorefactor - 1) / logdistancefactor
 180                 # elodiff'(scorefactor) = 1 / ((scorefactor) (1 - scorefactor) logdistancefactor)
 181                 # elodiff'(scorefactor) >= 4 / logdistancefactor
 182
 183                 # adjust'(scorefactor) = K1 + K2
 184
 185                 # so we want:
 186                 # K1 + K2 <= 4 / logdistancefactor <= elodiff'(scorefactor)
 187                 # as we then don't overcompensate
 188
 189                 adjustment = scorefactor_real - scorefactor_elo
 190                 eloadjust[ei.player_id] += adjustment
 191                 eloadjust[ej.player_id] -= adjustment
 192         for pid in pids:
 193             elos[pid].elo = max(float(elos[pid].elo) + eloadjust[pid] * elos[pid].k * ep.global_K / float(len(elos) - 1), ep.floor)
 194             elos[pid].games += 1
 195         return elos
 196
 197
 198 class PlayerGameStat(object):
 199     def __init__(self, player_game_stat_id=None, create_dt=None):
 200         self.player_game_stat_id = player_game_stat_id
 201         self.create_dt = create_dt
 202
 203     def __repr__(self):
 204         return "<PlayerGameStat(%s, %s, %s)>" \
 205         % (self.player_id, self.game_id, self.create_dt)
 206
 207     def nick_stripped(self):
 208         if self.nick is None:
 209             return "Anonymous Player"
 210         else:
 211             return strip_colors(self.nick)
 212
 213     def nick_html_colors(self):
 214         if self.nick is None:
 215             return "Anonymous Player"
 216         else:
 217             return html_colors(self.nick)
 218
 219     def team_html_color(self):
 220         # blue
 221         if self.team == 5:
 222             return "red"
 223         # red
 224         if self.team == 14:
 225             return "blue"
 226         if self.team == 13:
 227             return "yellow"
 228         if self.team == 10:
 229             return "pink"
 230
 231
 232 class Achievement(object):
 233     def __repr__(self):
 234         return "<Achievement(%s, %s, %s)>" % (self.achievement_cd, self.descr,
 235                 self.limit)
 236
 237
 238 class PlayerAchievement(object):
 239     def __repr__(self):
 240         return "<PlayerAchievement(%s, %s)>" % (self.player_id, self.achievement_cd)
 241
 242
 243 class PlayerWeaponStat(object):
 244     def __repr__(self):
 245         return "<PlayerWeaponStat(%s, %s, %s)>" % (self.player_weapon_stats_id,
 246                 self.player_id, self.game_id)
 247
 248
 249 class Hashkey(object):
 250     def __init__(self, player_id=None, hashkey=None):
 251         self.player_id = player_id
 252         self.hashkey = hashkey
 253
 254     def __repr__(self):
 255         return "<Hashkey(%s, %s)>" % (self.player_id, self.hashkey)
 256
 257
 258 class PlayerNick(object):
 259     def __repr__(self):
 260         return "<PlayerNick(%s, %s)>" % (self.player_id, self.stripped_nick)
 261
 262
 263 class PlayerElo(object):
 264     def __init__(self, player_id=None, game_type_cd=None):
 265
 266         self.player_id = player_id
 267         self.game_type_cd = game_type_cd
 268         self.score = 0
 269         self.games = 0
 270         self.elo = ELOPARMS.initial
 271
 272     def __repr__(self):
 273         return "<PlayerElo(pid=%s, gametype=%s, elo=%s)>" % \
 274                 (self.player_id, self.game_type_cd, self.elo)
 275
 276
 277 class PlayerRank(object):
 278
 279     def nick_html_colors(self):
 280         if self.nick is None:
 281             return "Anonymous Player"
 282         else:
 283             return html_colors(self.nick)
 284
 285
 286     def __repr__(self):
 287         return "<PlayerRank(pid=%s, gametype=%s, rank=%s)>" % \
 288                 (self.player_id, self.game_type_cd, self.rank)
 289
 290
 291 def initialize_db(engine=None):
 292     DBSession.configure(bind=engine)
 293     Base.metadata.bind = engine
 294     Base.metadata.create_all(engine)
 295     MetaData = sqlalchemy.MetaData(bind=engine, reflect=True)
 296
 297     # assign all those tables to an object
 298     achievements_table = MetaData.tables['achievements']
 299     cd_achievement_table = MetaData.tables['cd_achievement']
 300     cd_game_type_table = MetaData.tables['cd_game_type']
 301     cd_weapon_table = MetaData.tables['cd_weapon']
 302     db_version_table = MetaData.tables['db_version']
 303     games_table = MetaData.tables['games']
 304     hashkeys_table = MetaData.tables['hashkeys']
 305     maps_table = MetaData.tables['maps']
 306     player_game_stats_table = MetaData.tables['player_game_stats']
 307     players_table = MetaData.tables['players']
 308     player_weapon_stats_table = MetaData.tables['player_weapon_stats']
 309     servers_table = MetaData.tables['servers']
 310     player_nicks_table = MetaData.tables['player_nicks']
 311     player_elos_table = MetaData.tables['player_elos']
 312     player_ranks_table = MetaData.tables['player_ranks']
 313
 314     # now map the tables and the objects together
 315     mapper(PlayerAchievement, achievements_table)
 316     mapper(Achievement, cd_achievement_table)
 317     mapper(GameType, cd_game_type_table)
 318     mapper(Weapon, cd_weapon_table)
 319     mapper(Game, games_table)
 320     mapper(Hashkey, hashkeys_table)
 321     mapper(Map, maps_table)
 322     mapper(PlayerGameStat, player_game_stats_table)
 323     mapper(Player, players_table)
 324     mapper(PlayerWeaponStat, player_weapon_stats_table)
 325     mapper(Server, servers_table)
 326     mapper(PlayerNick, player_nicks_table)
 327     mapper(PlayerElo, player_elos_table)
 328     mapper(PlayerRank, player_ranks_table)