shogi_server/pairing.rb

   1 ## $Id$
   2
   3 ## Copyright (C) 2004 NABEYA Kenichi (aka nanami@2ch)
   4 ## Copyright (C) 2007-2008 Daigo Moriwaki (daigo at debian dot org)
   5 ##
   6 ## This program is free software; you can redistribute it and/or modify
   7 ## it under the terms of the GNU General Public License as published by
   8 ## the Free Software Foundation; either version 2 of the License, or
   9 ## (at your option) any later version.
  10 ##
  11 ## This program is distributed in the hope that it will be useful,
  12 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 ## GNU General Public License for more details.
  15 ##
  16 ## You should have received a copy of the GNU General Public License
  17 ## along with this program; if not, write to the Free Software
  18 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19
  20 require 'shogi_server/util'
  21
  22 module ShogiServer
  23
  24   class Pairing
  25
  26     class << self
  27       def default_factory
  28         return swiss_pairing
  29       end
  30
  31       def sort_by_rate_with_randomness
  32         return [LogPlayers.new,
  33                 ExcludeSacrificeGps500.new,
  34                 MakeEven.new,
  35                 SortByRateWithRandomness.new(1200, 2400),
  36                 StartGame.new]
  37       end
  38
  39       def random_pairing
  40         return [LogPlayers.new,
  41                 ExcludeSacrificeGps500.new,
  42                 MakeEven.new,
  43                 Randomize.new,
  44                 StartGame.new]
  45       end
  46
  47       def swiss_pairing
  48         history = ShogiServer::League::Floodgate::History.factory
  49         return [LogPlayers.new,
  50                 ExcludeSacrificeGps500.new,
  51                 MakeEven.new,
  52                 Swiss.new(history),
  53                 StartGame.new]
  54       end
  55
  56       def match(players)
  57         logics = default_factory
  58         logics.inject(players) do |result, item|
  59           item.match(result)
  60           result
  61         end
  62       end
  63     end # class << self
  64
  65
  66     def match(players)
  67       # to be implemented
  68       log_message("Floodgate: %s" % [self.class.to_s])
  69     end
  70
  71     def include_newbie?(players)
  72       return players.find{|a| a.rate == 0} == nil ? false : true
  73     end
  74
  75     def less_than_one?(players)
  76       if players.size < 1
  77         log_warning("Floodgate: There should be at least one player.")
  78         return true
  79       else
  80         return false
  81       end
  82     end
  83
  84     def log_players(players)
  85       str_array = players.map do |one|
  86         if block_given?
  87           yield one
  88         else
  89           one.name
  90         end
  91       end
  92       if str_array.empty?
  93         log_message("Floodgate: [Players] Nobody found.")
  94       else
  95         log_message("Floodgate: [Players] %s." % [str_array.join(", ")])
  96       end
  97     end
  98   end # Pairing
  99
 100
 101   class LogPlayers < Pairing
 102     def match(players)
 103       super
 104       log_players(players)
 105     end
 106   end
 107
 108   class StartGame < Pairing
 109     def match(players)
 110       super
 111       if players.size < 2
 112         log_warning("Floodgate: There should be more than one player (%d)." % [players.size])
 113         return
 114       end
 115       if players.size.odd?
 116         log_warning("Floodgate: There are odd players (%d). %s will not be matched." %
 117                     [players.size, players.last.name])
 118       end
 119
 120       log_players(players)
 121       while (players.size >= 2) do
 122         pair = players.shift(2)
 123         pair.shuffle!
 124         start_game(pair.first, pair.last)
 125       end
 126     end
 127
 128     def start_game(p1, p2)
 129       log_message("Floodgate: Starting a game: BLACK %s vs WHITE %s" % [p1.name, p2.name])
 130       p1.sente = true
 131       p2.sente = false
 132       Game.new(p1.game_name, p1, p2)
 133     end
 134   end
 135
 136   class Randomize < Pairing
 137     def match(players)
 138       super
 139       log_message("Floodgate: Randomize... before")
 140       log_players(players)
 141       players.shuffle!
 142       log_message("Floodgate: Randomized after")
 143       log_players(players)
 144     end
 145   end # RadomPairing
 146
 147   class SortByRate < Pairing
 148     def match(players)
 149       super
 150       log_message("Floodgate: Ordered by rate")
 151       players.sort! {|a,b| a.rate <=> b.rate} # decendent order
 152       log_players(players)
 153     end
 154   end
 155
 156   class SortByRateWithRandomness < Pairing
 157     def initialize(rand1, rand2)
 158       super()
 159       @rand1, @rand2 = rand1, rand2
 160     end
 161
 162     def match(players, desc=false)
 163       super(players)
 164       cur_rate = Hash.new
 165       players.each{|a| cur_rate[a] = a.rate ? a.rate + rand(@rand1) : rand(@rand2)}
 166       players.sort!{|a,b| cur_rate[a] <=> cur_rate[b]}
 167       players.reverse! if desc
 168       log_players(players) do |one|
 169         "%s %d (+ randomness %d)" % [one.name, one.rate, cur_rate[one] - one.rate]
 170       end
 171     end
 172   end
 173
 174   class Swiss < Pairing
 175     def initialize(history)
 176       super()
 177       @history = history
 178     end
 179
 180     def match(players)
 181       super
 182       winners = players.find_all {|pl| @history.last_win?(pl.player_id)}
 183       rest    = players - winners
 184
 185       log_message("Floodgate: Ordering %d winners..." % [winners.size])
 186       sbrwr_winners = SortByRateWithRandomness.new(800, 2500)
 187       sbrwr_winners.match(winners, true)
 188
 189       log_message("Floodgate: Ordering the rest (%d)..." % [rest.size])
 190       sbrwr_losers = SortByRateWithRandomness.new(200, 400)
 191       sbrwr_losers.match(rest, true)
 192
 193       players.clear
 194       [winners, rest].each do |group|
 195         group.each {|pl| players << pl}
 196       end
 197     end
 198   end
 199
 200   class DeletePlayerAtRandom < Pairing
 201     def match(players)
 202       super
 203       return if less_than_one?(players)
 204       one = players.choice
 205       log_message("Floodgate: Deleted %s at random" % [one.name])
 206       players.delete(one)
 207       log_players(players)
 208     end
 209   end
 210
 211   class DeletePlayerAtRandomExcept < Pairing
 212     def initialize(except)
 213       super()
 214       @except = except
 215     end
 216
 217     def match(players)
 218       super
 219       log_message("Floodgate: Deleting a player at rondom except %s" % [@except.name])
 220       players.delete(@except)
 221       DeletePlayerAtRandom.new.match(players)
 222       players.push(@except)
 223     end
 224   end
 225
 226   class DeleteMostPlayingPlayer < Pairing
 227     def match(players)
 228       super
 229       one = players.max_by {|a| a.win + a.loss}
 230       log_message("Floodgate: Deleted the most playing player: %s (%d)" % [one.name, one.win + one.loss])
 231       players.delete(one)
 232       log_players(players)
 233     end
 234   end
 235
 236   class DeleteLeastRatePlayer < Pairing
 237     def match(players)
 238       super
 239       one = players.min_by {|a| a.rate}
 240       log_message("Floodgate: Deleted the least rate player %s (%d)" % [one.name, one.rate])
 241       players.delete(one)
 242       log_players(players)
 243     end
 244   end
 245
 246   class ExcludeSacrifice < Pairing
 247     attr_reader :sacrifice
 248
 249     # @sacrifice a player id to be eliminated
 250     def initialize(sacrifice)
 251       super()
 252       @sacrifice = sacrifice
 253     end
 254
 255     def match(players)
 256       super
 257       if @sacrifice &&
 258          players.size.odd? &&
 259          players.find{|a| a.player_id == @sacrifice}
 260          log_message("Floodgate: Deleting the sacrifice %s" % [@sacrifice])
 261          players.delete_if{|a| a.player_id == @sacrifice}
 262          log_players(players)
 263       end
 264     end
 265   end # class ExcludeSacrifice
 266
 267   class ExcludeSacrificeGps500 < ExcludeSacrifice
 268     def initialize
 269       super("gps500+e293220e3f8a3e59f79f6b0efffaa931")
 270     end
 271   end
 272
 273   class MakeEven < Pairing
 274     def match(players)
 275       super
 276       return if players.size.even?
 277       log_message("Floodgate: There are odd players (%d). Deleting one of them..." %
 278                   [players.size])
 279       DeletePlayerAtRandom.new.match(players)
 280     end
 281   end
 282
 283 end # ShogiServer