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[p] = s
  99                     alivetimes[p] = a.seconds
 100
 101         player_ids = scores.keys()
 102
 103         elos = {}
 104         for e in session.query(PlayerElo).\
 105                 filter(PlayerElo.player_id.in_(player_ids)).\
 106                 filter(PlayerElo.game_type_cd==game_type_cd).all():
 107                     elos[e.player_id] = e
 108
 109         # ensure that all player_ids have an elo record
 110         for pid in player_ids:
 111             if pid not in elos.keys():
 112                 elos[pid] = PlayerElo(pid, game_type_cd)
 113
 114         for pid in player_ids:
 115             elos[pid].k = KREDUCTION.eval(elos[pid].games, alivetimes[pid], 0)
 116
 117         elos = self.update_elos(elos, scores, ELOPARMS)
 118
 119         # add the elos to the session for committing
 120         for e in elos:
 121             session.add(elos[e])
 122
 123         # TODO: duels are also logged as DM for elo purposes
 124
 125     def update_elos(self, elos, scores, ep):
 126         eloadjust = {}
 127         for pid in elos.keys():
 128             eloadjust[pid] = 0
 129
 130         if len(elos) < 2:
 131             return elos
 132
 133         pids = elos.keys()
 134
 135         for i in xrange(0, len(pids)):
 136             ei = elos[pids[i]]
 137             for j in xrange(i+1, len(pids)):
 138                 ej = elos[pids[j]]
 139                 si = scores[ei.player_id]
 140                 sj = scores[ej.player_id]
 141
 142                 # normalize scores
 143                 ofs = min(0, si, sj)
 144                 si -= ofs
 145                 sj -= ofs
 146                 if si + sj == 0:
 147                     si, sj = 1, 1 # a draw
 148
 149                 # real score factor
 150                 scorefactor_real = si / float(si + sj)
 151
 152                 # estimated score factor by elo
 153                 elodiff = min(ep.maxlogdistance, max(-ep.maxlogdistance, (ei.elo - ej.elo) * ep.logdistancefactor))
 154                 scorefactor_elo = 1 / (1 + math.exp(-elodiff))
 155
 156                 # how much adjustment is good?
 157                 # scorefactor(elodiff) = 1 / (1 + e^(-elodiff * logdistancefactor))
 158                 # elodiff(scorefactor) = -ln(1/scorefactor - 1) / logdistancefactor
 159                 # elodiff'(scorefactor) = 1 / ((scorefactor) (1 - scorefactor) logdistancefactor)
 160                 # elodiff'(scorefactor) >= 4 / logdistancefactor
 161
 162                 # adjust'(scorefactor) = K1 + K2
 163
 164                 # so we want:
 165                 # K1 + K2 <= 4 / logdistancefactor <= elodiff'(scorefactor)
 166                 # as we then don't overcompensate
 167
 168                 adjustment = scorefactor_real - scorefactor_elo
 169                 eloadjust[ei.player_id] += adjustment
 170                 eloadjust[ei.player_id] -= adjustment
 171         for pid in pids:
 172             elos[pid].elo = max(elos[pid].elo + eloadjust[pid] * elos[pid].k * ep.global_K / float(len(elos) - 1), ep.floor)
 173             elos[pid].games += 1
 174         return elos
 175
 176
 177 class PlayerGameStat(object):
 178     def __init__(self, player_game_stat_id=None, create_dt=None):
 179         self.player_game_stat_id = player_game_stat_id
 180         self.create_dt = create_dt
 181
 182     def __repr__(self):
 183         return "<PlayerGameStat(%s, %s, %s)>" \
 184         % (self.player_id, self.game_id, self.create_dt)
 185
 186     def nick_stripped(self):
 187         if self.nick is None:
 188             return "Anonymous Player"
 189         else:
 190             return strip_colors(self.nick)
 191
 192     def nick_html_colors(self):
 193         if self.nick is None:
 194             return "Anonymous Player"
 195         else:
 196             return html_colors(self.nick)
 197
 198     def team_html_color(self):
 199         # blue
 200         if self.team == 5:
 201             return "red"
 202         # red
 203         if self.team == 14:
 204             return "blue"
 205         if self.team == 13:
 206             return "yellow"
 207         if self.team == 10:
 208             return "pink"
 209
 210
 211 class Achievement(object):
 212     def __repr__(self):
 213         return "<Achievement(%s, %s, %s)>" % (self.achievement_cd, self.descr,
 214                 self.limit)
 215
 216
 217 class PlayerAchievement(object):
 218     def __repr__(self):
 219         return "<PlayerAchievement(%s, %s)>" % (self.player_id, self.achievement_cd)
 220
 221
 222 class PlayerWeaponStat(object):
 223     def __repr__(self):
 224         return "<PlayerWeaponStat(%s, %s, %s)>" % (self.player_weapon_stats_id,
 225                 self.player_id, self.game_id)
 226
 227
 228 class Hashkey(object):
 229     def __init__(self, player_id=None, hashkey=None):
 230         self.player_id = player_id
 231         self.hashkey = hashkey
 232
 233     def __repr__(self):
 234         return "<Hashkey(%s, %s)>" % (self.player_id, self.hashkey)
 235
 236
 237 class PlayerNick(object):
 238     def __repr__(self):
 239         return "<PlayerNick(%s, %s)>" % (self.player_id, self.stripped_nick)
 240
 241
 242 class PlayerElo(object):
 243     def __init__(self, player_id=None, game_type_cd=None):
 244         self.player_id = player_id
 245         self.game_type_cd = game_type_cd
 246         self.elo = 0
 247         self.k = 0.0
 248         self.score = 0
 249         self.games = 0
 250
 251     def __repr__(self):
 252         return "<PlayerElo(%s, %s, %s)>" % (self.player_id, self.game_type_cd,
 253                 self.elo)
 254
 255
 256 def initialize_db(engine=None):
 257     DBSession.configure(bind=engine)
 258     Base.metadata.bind = engine
 259     Base.metadata.create_all(engine)
 260     MetaData = sqlalchemy.MetaData(bind=engine, reflect=True)
 261
 262     # assign all those tables to an object
 263     achievements_table = MetaData.tables['achievements']
 264     cd_achievement_table = MetaData.tables['cd_achievement']
 265     cd_game_type_table = MetaData.tables['cd_game_type']
 266     cd_weapon_table = MetaData.tables['cd_weapon']
 267     db_version_table = MetaData.tables['db_version']
 268     games_table = MetaData.tables['games']
 269     hashkeys_table = MetaData.tables['hashkeys']
 270     maps_table = MetaData.tables['maps']
 271     player_game_stats_table = MetaData.tables['player_game_stats']
 272     players_table = MetaData.tables['players']
 273     player_weapon_stats_table = MetaData.tables['player_weapon_stats']
 274     servers_table = MetaData.tables['servers']
 275     player_nicks_table = MetaData.tables['player_nicks']
 276     player_elos_table = MetaData.tables['player_elos']
 277
 278     # now map the tables and the objects together
 279     mapper(PlayerAchievement, achievements_table)
 280     mapper(Achievement, cd_achievement_table)
 281     mapper(GameType, cd_game_type_table)
 282     mapper(Weapon, cd_weapon_table)
 283     mapper(Game, games_table)
 284     mapper(Hashkey, hashkeys_table)
 285     mapper(Map, maps_table)
 286     mapper(PlayerGameStat, player_game_stats_table)
 287     mapper(Player, players_table)
 288     mapper(PlayerWeaponStat, player_weapon_stats_table)
 289     mapper(Server, servers_table)
 290     mapper(PlayerNick, player_nicks_table)
 291     mapper(PlayerElo, player_elos_table)