xonstat/models.py

   1 import logging
   2 import math
   3 import sqlalchemy
   4 import sqlalchemy.sql.functions as func
   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         duration = session.query(func.max(PlayerGameStat.alivetime)).\
  92                 filter(PlayerGameStat.game_id==self.game_id).\
  93                 one()
  94
  95         scores = {}
  96         alivetimes = {}
  97         for (p,s,a) in session.query(PlayerGameStat.player_id,
  98                 PlayerGameStat.score, PlayerGameStat.alivetime).\
  99                 filter(PlayerGameStat.game_id==self.game_id).\
 100                 filter(PlayerGameStat.alivetime > timedelta(seconds=0)).\
 101                 filter(PlayerGameStat.player_id > 2).\
 102                 all():
 103                     # scores are per second
 104                     scores[p] = s/float(a.seconds)
 105                     alivetimes[p] = a.seconds
 106
 107         player_ids = scores.keys()
 108
 109         elos = {}
 110         for e in session.query(PlayerElo).\
 111                 filter(PlayerElo.player_id.in_(player_ids)).\
 112                 filter(PlayerElo.game_type_cd==game_type_cd).all():
 113                     elos[e.player_id] = e
 114
 115         # ensure that all player_ids have an elo record
 116         for pid in player_ids:
 117             if pid not in elos.keys():
 118                 elos[pid] = PlayerElo(pid, game_type_cd)
 119
 120         for pid in player_ids:
 121             elos[pid].k = KREDUCTION.eval(elos[pid].games, alivetimes[pid],
 122                     duration.seconds)
 123
 124         elos = self.update_elos(elos, scores, ELOPARMS)
 125
 126         # add the elos to the session for committing
 127         for e in elos:
 128             session.add(elos[e])
 129
 130         if game_type_cd == 'duel':
 131             self.process_elos(session, "dm")
 132
 133     def update_elos(self, elos, scores, ep):
 134         eloadjust = {}
 135         for pid in elos.keys():
 136             eloadjust[pid] = 0
 137
 138         if len(elos) < 2:
 139             return elos
 140
 141         pids = elos.keys()
 142
 143         for i in xrange(0, len(pids)):
 144             ei = elos[pids[i]]
 145             for j in xrange(i+1, len(pids)):
 146                 ej = elos[pids[j]]
 147                 si = scores[ei.player_id]
 148                 sj = scores[ej.player_id]
 149
 150                 # normalize scores
 151                 ofs = min(0, si, sj)
 152                 si -= ofs
 153                 sj -= ofs
 154                 if si + sj == 0:
 155                     si, sj = 1, 1 # a draw
 156
 157                 # real score factor
 158                 scorefactor_real = si / float(si + sj)
 159
 160                 # estimated score factor by elo
 161                 elodiff = min(ep.maxlogdistance, max(-ep.maxlogdistance,
 162                     (float(ei.elo) - float(ej.elo)) * ep.logdistancefactor))
 163                 scorefactor_elo = 1 / (1 + math.exp(-elodiff))
 164
 165                 # how much adjustment is good?
 166                 # scorefactor(elodiff) = 1 / (1 + e^(-elodiff * logdistancefactor))
 167                 # elodiff(scorefactor) = -ln(1/scorefactor - 1) / logdistancefactor
 168                 # elodiff'(scorefactor) = 1 / ((scorefactor) (1 - scorefactor) logdistancefactor)
 169                 # elodiff'(scorefactor) >= 4 / logdistancefactor
 170
 171                 # adjust'(scorefactor) = K1 + K2
 172
 173                 # so we want:
 174                 # K1 + K2 <= 4 / logdistancefactor <= elodiff'(scorefactor)
 175                 # as we then don't overcompensate
 176
 177                 adjustment = scorefactor_real - scorefactor_elo
 178                 eloadjust[ei.player_id] += adjustment
 179                 eloadjust[ej.player_id] -= adjustment
 180         for pid in pids:
 181             elos[pid].elo = max(float(elos[pid].elo) + eloadjust[pid] * elos[pid].k * ep.global_K / float(len(elos) - 1), ep.floor)
 182             elos[pid].games += 1
 183         return elos
 184
 185
 186 class PlayerGameStat(object):
 187     def __init__(self, player_game_stat_id=None, create_dt=None):
 188         self.player_game_stat_id = player_game_stat_id
 189         self.create_dt = create_dt
 190
 191     def __repr__(self):
 192         return "<PlayerGameStat(%s, %s, %s)>" \
 193         % (self.player_id, self.game_id, self.create_dt)
 194
 195     def nick_stripped(self):
 196         if self.nick is None:
 197             return "Anonymous Player"
 198         else:
 199             return strip_colors(self.nick)
 200
 201     def nick_html_colors(self):
 202         if self.nick is None:
 203             return "Anonymous Player"
 204         else:
 205             return html_colors(self.nick)
 206
 207     def team_html_color(self):
 208         # blue
 209         if self.team == 5:
 210             return "red"
 211         # red
 212         if self.team == 14:
 213             return "blue"
 214         if self.team == 13:
 215             return "yellow"
 216         if self.team == 10:
 217             return "pink"
 218
 219
 220 class Achievement(object):
 221     def __repr__(self):
 222         return "<Achievement(%s, %s, %s)>" % (self.achievement_cd, self.descr,
 223                 self.limit)
 224
 225
 226 class PlayerAchievement(object):
 227     def __repr__(self):
 228         return "<PlayerAchievement(%s, %s)>" % (self.player_id, self.achievement_cd)
 229
 230
 231 class PlayerWeaponStat(object):
 232     def __repr__(self):
 233         return "<PlayerWeaponStat(%s, %s, %s)>" % (self.player_weapon_stats_id,
 234                 self.player_id, self.game_id)
 235
 236
 237 class Hashkey(object):
 238     def __init__(self, player_id=None, hashkey=None):
 239         self.player_id = player_id
 240         self.hashkey = hashkey
 241
 242     def __repr__(self):
 243         return "<Hashkey(%s, %s)>" % (self.player_id, self.hashkey)
 244
 245
 246 class PlayerNick(object):
 247     def __repr__(self):
 248         return "<PlayerNick(%s, %s)>" % (self.player_id, self.stripped_nick)
 249
 250
 251 class PlayerElo(object):
 252     def __init__(self, player_id=None, game_type_cd=None):
 253
 254         self.player_id = player_id
 255         self.game_type_cd = game_type_cd
 256         self.score = 0
 257         self.games = 0
 258         self.elo = ELOPARMS.initial
 259
 260     def __repr__(self):
 261         return "<PlayerElo(pid=%s, gametype=%s, elo=%s)>" % \
 262                 (self.player_id, self.game_type_cd, self.elo)
 263
 264
 265 def initialize_db(engine=None):
 266     DBSession.configure(bind=engine)
 267     Base.metadata.bind = engine
 268     Base.metadata.create_all(engine)
 269     MetaData = sqlalchemy.MetaData(bind=engine, reflect=True)
 270
 271     # assign all those tables to an object
 272     achievements_table = MetaData.tables['achievements']
 273     cd_achievement_table = MetaData.tables['cd_achievement']
 274     cd_game_type_table = MetaData.tables['cd_game_type']
 275     cd_weapon_table = MetaData.tables['cd_weapon']
 276     db_version_table = MetaData.tables['db_version']
 277     games_table = MetaData.tables['games']
 278     hashkeys_table = MetaData.tables['hashkeys']
 279     maps_table = MetaData.tables['maps']
 280     player_game_stats_table = MetaData.tables['player_game_stats']
 281     players_table = MetaData.tables['players']
 282     player_weapon_stats_table = MetaData.tables['player_weapon_stats']
 283     servers_table = MetaData.tables['servers']
 284     player_nicks_table = MetaData.tables['player_nicks']
 285     player_elos_table = MetaData.tables['player_elos']
 286
 287     # now map the tables and the objects together
 288     mapper(PlayerAchievement, achievements_table)
 289     mapper(Achievement, cd_achievement_table)
 290     mapper(GameType, cd_game_type_table)
 291     mapper(Weapon, cd_weapon_table)
 292     mapper(Game, games_table)
 293     mapper(Hashkey, hashkeys_table)
 294     mapper(Map, maps_table)
 295     mapper(PlayerGameStat, player_game_stats_table)
 296     mapper(Player, players_table)
 297     mapper(PlayerWeaponStat, player_weapon_stats_table)
 298     mapper(Server, servers_table)
 299     mapper(PlayerNick, player_nicks_table)
 300     mapper(PlayerElo, player_elos_table)