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       board = Board.new
 133       board.initial
 134       Game.new(p1.game_name, p1, p2, board)
 135     end
 136   end
 137
 138   class Randomize < Pairing
 139     def match(players)
 140       super
 141       log_message("Floodgate: Randomize... before")
 142       log_players(players)
 143       players.shuffle!
 144       log_message("Floodgate: Randomized after")
 145       log_players(players)
 146     end
 147   end # RadomPairing
 148
 149   class SortByRate < Pairing
 150     def match(players)
 151       super
 152       log_message("Floodgate: Ordered by rate")
 153       players.sort! {|a,b| a.rate <=> b.rate} # decendent order
 154       log_players(players)
 155     end
 156   end
 157
 158   class SortByRateWithRandomness < Pairing
 159     def initialize(rand1, rand2)
 160       super()
 161       @rand1, @rand2 = rand1, rand2
 162     end
 163
 164     def match(players, desc=false)
 165       super(players)
 166       cur_rate = Hash.new
 167       players.each{|a| cur_rate[a] = a.rate ? a.rate + rand(@rand1) : rand(@rand2)}
 168       players.sort!{|a,b| cur_rate[a] <=> cur_rate[b]}
 169       players.reverse! if desc
 170       log_players(players) do |one|
 171         "%s %d (+ randomness %d)" % [one.name, one.rate, cur_rate[one] - one.rate]
 172       end
 173     end
 174   end
 175
 176   class Swiss < Pairing
 177     def initialize(history)
 178       super()
 179       @history = history
 180     end
 181
 182     def match(players)
 183       super
 184       winners = players.find_all {|pl| @history.last_win?(pl.player_id)}
 185       rest    = players - winners
 186
 187       log_message("Floodgate: Ordering %d winners..." % [winners.size])
 188       sbrwr_winners = SortByRateWithRandomness.new(800, 2500)
 189       sbrwr_winners.match(winners, true)
 190
 191       log_message("Floodgate: Ordering the rest (%d)..." % [rest.size])
 192       sbrwr_losers = SortByRateWithRandomness.new(200, 400)
 193       sbrwr_losers.match(rest, true)
 194
 195       players.clear
 196       [winners, rest].each do |group|
 197         group.each {|pl| players << pl}
 198       end
 199     end
 200   end
 201
 202   class DeletePlayerAtRandom < Pairing
 203     def match(players)
 204       super
 205       return if less_than_one?(players)
 206       one = players.choice
 207       log_message("Floodgate: Deleted %s at random" % [one.name])
 208       players.delete(one)
 209       log_players(players)
 210     end
 211   end
 212
 213   class DeletePlayerAtRandomExcept < Pairing
 214     def initialize(except)
 215       super()
 216       @except = except
 217     end
 218
 219     def match(players)
 220       super
 221       log_message("Floodgate: Deleting a player at rondom except %s" % [@except.name])
 222       players.delete(@except)
 223       DeletePlayerAtRandom.new.match(players)
 224       players.push(@except)
 225     end
 226   end
 227
 228   class DeleteMostPlayingPlayer < Pairing
 229     def match(players)
 230       super
 231       one = players.max_by {|a| a.win + a.loss}
 232       log_message("Floodgate: Deleted the most playing player: %s (%d)" % [one.name, one.win + one.loss])
 233       players.delete(one)
 234       log_players(players)
 235     end
 236   end
 237
 238   class DeleteLeastRatePlayer < Pairing
 239     def match(players)
 240       super
 241       one = players.min_by {|a| a.rate}
 242       log_message("Floodgate: Deleted the least rate player %s (%d)" % [one.name, one.rate])
 243       players.delete(one)
 244       log_players(players)
 245     end
 246   end
 247
 248   class ExcludeSacrifice < Pairing
 249     attr_reader :sacrifice
 250
 251     # @sacrifice a player id to be eliminated
 252     def initialize(sacrifice)
 253       super()
 254       @sacrifice = sacrifice
 255     end
 256
 257     def match(players)
 258       super
 259       if @sacrifice &&
 260          players.size.odd? &&
 261          players.find{|a| a.player_id == @sacrifice}
 262          log_message("Floodgate: Deleting the sacrifice %s" % [@sacrifice])
 263          players.delete_if{|a| a.player_id == @sacrifice}
 264          log_players(players)
 265       end
 266     end
 267   end # class ExcludeSacrifice
 268
 269   class ExcludeSacrificeGps500 < ExcludeSacrifice
 270     def initialize
 271       super("gps500+e293220e3f8a3e59f79f6b0efffaa931")
 272     end
 273   end
 274
 275   class MakeEven < Pairing
 276     def match(players)
 277       super
 278       return if players.size.even?
 279       log_message("Floodgate: There are odd players (%d). Deleting one of them..." %
 280                   [players.size])
 281       DeletePlayerAtRandom.new.match(players)
 282     end
 283   end
 284
 285 end # ShogiServer