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 sort_by_rate_with_randomness
  29       end
  30
  31       def sort_by_rate_with_randomness
  32         return [ExcludeSacrificeGps500.new,
  33                 MakeEven.new,
  34                 SortByRateWithRandomness.new(1200, 2400),
  35                 StartGame.new]
  36       end
  37
  38       def random_pairing
  39         return [ExcludeSacrificeGps500.new,
  40                 MakeEven.new,
  41                 RandomPairing.new,
  42                 StartGame.new]
  43       end
  44
  45       def match(players)
  46         logics = default_factory
  47         logics.inject(players) do |result, item|
  48           item.match(result)
  49         end
  50       end
  51     end # class << self
  52
  53
  54     def match(players)
  55       # to be implemented
  56     end
  57
  58     def include_newbie?(players)
  59       return players.find{|a| a.rate == 0} == nil ? false : true
  60     end
  61
  62     def less_than_one?(players)
  63       if players.size < 1
  64         log_warning("Floodgate: At least one player is required")
  65         return true
  66       else
  67         return true
  68       end
  69     end
  70
  71     def log_players(players)
  72       str_array = players.map do |one|
  73         if block_given?
  74           yield one
  75         else
  76           one.name
  77         end
  78       end
  79       log_message("Floodgate: [Players] %s" % [str_array.join(", ")])
  80     end
  81   end # Pairing
  82
  83   class StartGame < Pairing
  84     def match(players)
  85       super
  86       if players.size < 2
  87         log_warning("There should be more than one player: %d" % [players.size])
  88         return
  89       end
  90       if players.size.odd?
  91         log_warning("There are odd players: %d" % [players.size])
  92       end
  93
  94       log_players(players)
  95       while (players.size >= 2) do
  96         pair = players.shift(2)
  97         pair.shuffle!
  98         start_game(pair.first, pair.last)
  99       end
 100     end
 101
 102     def start_game
 103       log_message("Floodgate: BLACK %s; WHITE %s" % [p1.name, p2.name])
 104       p1.sente = true
 105       p2.sente = false
 106       Game.new(p1.game_name, p1, p2)
 107     end
 108   end
 109
 110   class Randomize < Pairing
 111     def match(players)
 112       super
 113       log_message("Floodgate: Randomize... before")
 114       log_players(players)
 115       players.shuffle!
 116       log_message("Floodgate: Randomized after")
 117       log_players(players)
 118     end
 119   end # RadomPairing
 120
 121   class SortByRate < Pairing
 122     def match(players)
 123       super
 124       log_message("Floodgate: Ordered by rate")
 125       players.sort! {|a,b| a.rate <=> b.rate} # decendent order
 126       log_players(players)
 127     end
 128   end
 129
 130   class SortByRateWithRandomness < Pairing
 131     def initialize(rand1, rand2)
 132       super()
 133       @rand1, @rand2 = rand1, rand2
 134     end
 135
 136     def match(players)
 137       super
 138       cur_rate = Hash.new
 139       players.each{|a| cur_rate[a] = a.rate ? a.rate + rand(@rand1) : rand(@rand2)}
 140       players.sort!{|a,b| cur_rate[a] <=> cur_rate[b]}
 141       log_players(players) do |one|
 142         "%s %d (randomness %d)" % [one.name, one.rate, cur_rate[one] - one.rate]
 143       end
 144     end
 145   end
 146
 147   class DeletePlayerAtRandom < Pairing
 148     def match(players)
 149       super
 150       return if less_than_one?(players)
 151       one = players.choice
 152       log_message("Floodgate: Deleted %s at random" % [one.name])
 153       players.delete(one)
 154       log_players(players)
 155     end
 156   end
 157
 158   class DeletePlayerAtRandomExcept < Pairing
 159     def initialize(except)
 160       super()
 161       @except = except
 162     end
 163
 164     def match(players)
 165       super
 166       log_message("Floodgate: Deleting a player at rondom except %s" % [@except.name])
 167       players.delete(@except)
 168       DeletePlayerAtRandom.new.match(players)
 169       players.push(@except)
 170     end
 171   end
 172
 173   class DeleteMostPlayingPlayer < Pairing
 174     def match(players)
 175       super
 176       one = players.max_by {|a| a.win + a.loss}
 177       log_message("Floodgate: Deleted the most playing player: %s (%d)" % [one.name, one.win + one.loss])
 178       players.delete(one)
 179       log_players(players)
 180     end
 181   end
 182
 183   class DeleteLeastRatePlayer < Pairing
 184     def match(players)
 185       super
 186       one = players.min_by {|a| a.rate}
 187       log_message("Floodgate: Deleted the least rate player %s (%d)" % [one.name, one.rate])
 188       players.delete(one)
 189       log_players(players)
 190     end
 191   end
 192
 193   class ExcludeSacrifice < Pairing
 194     attr_reader :sacrifice
 195
 196     # @sacrifice a player id to be eliminated
 197     def initialize(sacrifice)
 198       super()
 199       @sacrifice = sacrifice
 200     end
 201
 202     def match(players)
 203       super
 204       if @sacrifice &&
 205          players.size.odd? &&
 206          players.find{|a| a.player_id == @sacrifice}
 207          log_message("Floodgate: Deleting the sacrifice %s" % [@sacrifice])
 208          players.delete_if{|a| a.player_id == @sacrifice}
 209          log_players(players)
 210       end
 211     end
 212   end # class ExcludeSacrifice
 213
 214   class ExcludeSacrificeGps500 < ExcludeSacrifice
 215     def initialize
 216       super("gps500+e293220e3f8a3e59f79f6b0efffaa931")
 217     end
 218   end
 219
 220   class MakeEven < Pairing
 221     def match(players)
 222       super
 223       return if players.even?
 224       log_message("Floodgate: there are odd players: %d. Deleting one..." %
 225                   [players.size])
 226       DeletePlayerAtRandom.new.match(players)
 227     end
 228   end
 229
 230 end # ShogiServer