xonstat/models.py

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