xonstat/models.py

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