shogi_server/command.rb

   1 ## $Id$
   2
   3 ## Copyright (C) 2004 NABEYA Kenichi (aka nanami@2ch)
   4 ## Copyright (C) 2007-2012 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 'kconv'
  21 require 'shogi_server'
  22
  23 module ShogiServer
  24
  25   class Command
  26     # Factory method
  27     #
  28     def Command.factory(str, player, time=Time.now)
  29       cmd = nil
  30       case str
  31       when ""
  32         cmd = KeepAliveCommand.new(str, player)
  33       when /^[\+\-][^%]/
  34         cmd = MoveCommand.new(str, player)
  35       when /^%[^%]/, :timeout
  36         cmd = SpecialCommand.new(str, player)
  37       when :exception
  38         cmd = ExceptionCommand.new(str, player)
  39       when /^REJECT/
  40         cmd = RejectCommand.new(str, player)
  41       when /^AGREE/
  42         cmd = AgreeCommand.new(str, player)
  43       when /^%%SHOW\s+(\S+)/
  44         game_id = $1
  45         cmd = ShowCommand.new(str, player, $league.games[game_id])
  46       when /^%%MONITORON\s+(\S+)/
  47         game_id = $1
  48         cmd = MonitorOnCommand.new(str, player, $league.games[game_id])
  49       when /^%%MONITOROFF\s+(\S+)/
  50         game_id = $1
  51         cmd = MonitorOffCommand.new(str, player, $league.games[game_id])
  52       when /^%%MONITOR2ON\s+(\S+)/
  53         game_id = $1
  54         cmd = Monitor2OnCommand.new(str, player, $league.games[game_id])
  55       when /^%%MONITOR2OFF\s+(\S+)/
  56         game_id = $1
  57         cmd = Monitor2OffCommand.new(str, player, $league.games[game_id])
  58       when /^%%HELP/
  59         cmd = HelpCommand.new(str, player)
  60       when /^%%RATING/
  61         cmd = RatingCommand.new(str, player, $league.rated_players)
  62       when /^%%VERSION/
  63         cmd = VersionCommand.new(str, player)
  64       when /^%%GAME\s*$/
  65         cmd = GameCommand.new(str, player)
  66       when /^%%(GAME|CHALLENGE)\s+(\S+)\s+([\+\-\*])\s*$/
  67         command_name = $1
  68         game_name = $2
  69         my_sente_str = $3
  70         cmd = GameChallengeCommand.new(str, player,
  71                                        command_name, game_name, my_sente_str)
  72       when /^%%(GAME|CHALLENGE)\s+(\S+)/
  73         msg = "A turn identifier is required"
  74         cmd = ErrorCommand.new(str, player, msg)
  75       when /^%%CHAT\s+(.+)/
  76         message = $1
  77         cmd = ChatCommand.new(str, player, message, $league.players)
  78       when /^%%LIST/
  79         cmd = ListCommand.new(str, player, $league.games)
  80       when /^%%WHO/
  81         cmd = WhoCommand.new(str, player, $league.players)
  82       when /^LOGOUT/
  83         cmd = LogoutCommand.new(str, player)
  84       when /^CHALLENGE/
  85         cmd = ChallengeCommand.new(str, player)
  86       when /^%%SETBUOY\s+(\S+)\s+(\S+)(.*)/
  87         game_name = $1
  88         moves     = $2
  89         count = 1 # default
  90         if $3 && /^\s+(\d*)/ =~ $3
  91           count = $1.to_i
  92         end
  93         cmd = SetBuoyCommand.new(str, player, game_name, moves, count)
  94       when /^%%DELETEBUOY\s+(\S+)/
  95         game_name = $1
  96         cmd = DeleteBuoyCommand.new(str, player, game_name)
  97       when /^%%GETBUOYCOUNT\s+(\S+)/
  98         game_name = $1
  99         cmd = GetBuoyCountCommand.new(str, player, game_name)
 100       when /^%%FORK\s+(\S+)\s+(\S+)(.*)/
 101         source_game   = $1
 102         new_buoy_game = $2
 103         nth_move      = nil
 104         if $3 && /^\s+(\d+)/ =~ $3
 105           nth_move = $3.to_i
 106         end
 107         cmd = ForkCommand.new(str, player, source_game, new_buoy_game, nth_move)
 108       when /^%%FORK\s+(\S+)$/
 109         source_game   = $1
 110         new_buoy_game = nil
 111         nth_move      = nil
 112         cmd = ForkCommand.new(str, player, source_game, new_buoy_game, nth_move)
 113       when /^\s*$/
 114         cmd = SpaceCommand.new(str, player)
 115       when /^%%%[^%]/
 116         # TODO: just ignore commands specific to 81Dojo.
 117         # Need to discuss with 81Dojo people.
 118         cmd = VoidCommand.new(str, player)
 119       else
 120         cmd = ErrorCommand.new(str, player)
 121       end
 122
 123       cmd.time = time
 124       player.last_command_at = time
 125       return cmd
 126     end
 127
 128     def initialize(str, player)
 129       @str    = str
 130       @player = player
 131       @time   = Time.now # this should be replaced later with a real time
 132     end
 133     attr_accessor :time
 134   end
 135
 136   # Dummy command which does nothing.
 137   #
 138   class VoidCommand < Command
 139     def initialize(str, player)
 140       super
 141     end
 142
 143     def call
 144       return :continue
 145     end
 146   end
 147
 148   # Application-level protocol for Keep-Alive.
 149   # If the server receives an LF, it sends back an LF.  Note that the 30 sec
 150   # rule (client may not send LF again within 30 sec) is not implemented
 151   # yet.
 152   #
 153   class KeepAliveCommand < Command
 154     def initialize(str, player)
 155       super
 156     end
 157
 158     def call
 159       @player.write_safe("\n")
 160       return :continue
 161     end
 162   end
 163
 164   # Command of moving a piece.
 165   #
 166   class MoveCommand < Command
 167     def initialize(str, player)
 168       super
 169     end
 170
 171     def call
 172       if (@player.status == "game")
 173         array_str = @str.split(",")
 174         move = array_str.shift
 175         if @player.game.last_move &&
 176            @player.game.last_move.split(",").first == move
 177           log_warning("Received two sequencial identical moves [#{move}] from #{@player.name}. The last one was ignored.")
 178           return :continue
 179         end
 180         additional = array_str.shift
 181         comment = nil
 182         if /^'(.*)/ =~ additional
 183           comment = array_str.unshift("'*#{$1.toeuc}")
 184         end
 185         s = @player.game.handle_one_move(move, @player, @time)
 186         @player.game.log_game(Kconv.toeuc(comment.first)) if (comment && comment.first && !s)
 187         return :return if (s && @player.protocol == LoginCSA::PROTOCOL)
 188       end
 189       return :continue
 190     end
 191   end
 192
 193   # Command like "%TORYO" or :timeout
 194   #
 195   class SpecialCommand < Command
 196     def initialize(str, player)
 197       super
 198     end
 199
 200     def call
 201       rc = :continue
 202       if (@player.status == "game")
 203         rc = in_game_status()
 204       elsif ["agree_waiting", "start_waiting"].include?(@player.status)
 205         rc = in_waiting_status()
 206       else
 207         log_error("Received a command [#{@str}] from #{@player.name} in an inappropriate status [#{@player.status}].") unless @str == :timeout
 208       end
 209       return rc
 210     end
 211
 212     def in_game_status
 213       rc = :continue
 214
 215       s = @player.game.handle_one_move(@str, @player, @time)
 216       rc = :return if (s && @player.protocol == LoginCSA::PROTOCOL)
 217
 218       return rc
 219     end
 220
 221     def in_waiting_status
 222       rc = :continue
 223
 224       if @player.game.prepared_expire?
 225         log_warning("#{@player.status} lasted too long. This play has been expired: %s" % [@player.game.game_id])
 226         @player.game.reject("the Server (timed out)")
 227         rc = :return if (@player.protocol == LoginCSA::PROTOCOL)
 228       end
 229
 230       return rc
 231     end
 232   end
 233
 234   # Command of :exception
 235   #
 236   class ExceptionCommand < Command
 237     def initialize(str, player)
 238       super
 239     end
 240
 241     def call
 242       log_error("Failed to receive a message from #{@player.name}.")
 243       return :return
 244     end
 245   end
 246
 247   # Command of REJECT
 248   #
 249   class RejectCommand < Command
 250     def initialize(str, player)
 251       super
 252     end
 253
 254     def call
 255       if (@player.status == "agree_waiting")
 256         @player.game.reject(@player.name)
 257         return :return if (@player.protocol == LoginCSA::PROTOCOL)
 258       else
 259         log_error("Received a command [#{@str}] from #{@player.name} in an inappropriate status [#{@player.status}].")
 260         @player.write_safe(sprintf("##[ERROR] you are in %s status. REJECT is valid in agree_waiting status\n", @player.status))
 261       end
 262       return :continue
 263     end
 264   end
 265
 266   # Command of AGREE
 267   #
 268   class AgreeCommand < Command
 269     def initialize(str, player)
 270       super
 271     end
 272
 273     def call
 274       if (@player.status == "agree_waiting")
 275         @player.status = "start_waiting"
 276         if (@player.game.is_startable_status?)
 277           @player.game.start
 278         end
 279       else
 280         log_error("Received a command [#{@str}] from #{@player.name} in an inappropriate status [#{@player.status}].")
 281         @player.write_safe(sprintf("##[ERROR] you are in %s status. AGREE is valid in agree_waiting status\n", @player.status))
 282       end
 283       return :continue
 284     end
 285   end
 286
 287   # Base Command calss requiring a game instance
 288   #
 289   class BaseCommandForGame < Command
 290     def initialize(str, player, game)
 291       super(str, player)
 292       @game    = game
 293       @game_id = game ? game.game_id : nil
 294     end
 295   end
 296
 297   # Command of SHOW
 298   #
 299   class ShowCommand < BaseCommandForGame
 300     def initialize(str, player, game)
 301       super
 302     end
 303
 304     def call
 305       if (@game)
 306         @player.write_safe(@game.show.gsub(/^/, '##[SHOW] '))
 307       end
 308       @player.write_safe("##[SHOW] +OK\n")
 309       return :continue
 310     end
 311   end
 312
 313   class MonitorHandler
 314     def initialize(player)
 315       @player = player
 316       @type = nil
 317       @header = nil
 318     end
 319     attr_reader :player, :type, :header
 320
 321     def ==(rhs)
 322       return rhs != nil &&
 323              rhs.is_a?(MonitorHandler) &&
 324              @player == rhs.player &&
 325              @type   == rhs.type
 326     end
 327
 328     def write_safe(game_id, str)
 329       str.chomp.split("\n").each do |line|
 330         @player.write_safe("##[%s][%s] %s\n" % [@header, game_id, line.chomp])
 331       end
 332       @player.write_safe("##[%s][%s] %s\n" % [@header, game_id, "+OK"])
 333     end
 334   end
 335
 336   class MonitorHandler1 < MonitorHandler
 337     def initialize(player)
 338       super
 339       @type = 1
 340       @header = "MONITOR"
 341     end
 342
 343     def write_one_move(game_id, game)
 344       write_safe(game_id, game.show.chomp)
 345     end
 346   end
 347
 348   class MonitorHandler2 < MonitorHandler
 349     def initialize(player)
 350       super
 351       @type = 2
 352       @header = "MONITOR2"
 353     end
 354
 355     def write_one_move(game_id, game)
 356       write_safe(game_id, game.last_move.gsub(",", "\n"))
 357     end
 358   end
 359
 360   # Command of MONITORON
 361   #
 362   class MonitorOnCommand < BaseCommandForGame
 363     def initialize(str, player, game)
 364       super
 365     end
 366
 367     def call
 368       if (@game)
 369         monitor_handler = MonitorHandler1.new(@player)
 370         @game.monitoron(monitor_handler)
 371         monitor_handler.write_safe(@game_id, @game.show)
 372       end
 373       return :continue
 374     end
 375   end
 376
 377   # Command of MONITOROFF
 378   #
 379   class MonitorOffCommand < BaseCommandForGame
 380     def initialize(str, player, game)
 381       super
 382     end
 383
 384     def call
 385       if (@game)
 386         @game.monitoroff(MonitorHandler1.new(@player))
 387       end
 388       return :continue
 389     end
 390   end
 391
 392   # Command of MONITOR2ON
 393   #
 394   class Monitor2OnCommand < BaseCommandForGame
 395     def initialize(str, player, game)
 396       super
 397     end
 398
 399     def call
 400       if (@game)
 401         monitor_handler = MonitorHandler2.new(@player)
 402         @game.monitoron(monitor_handler)
 403         lines = IO::readlines(@game.logfile).join("")
 404         monitor_handler.write_safe(@game_id, lines)
 405       end
 406       return :continue
 407     end
 408   end
 409
 410   class Monitor2OffCommand < MonitorOffCommand
 411     def initialize(str, player, game)
 412       super
 413     end
 414
 415     def call
 416       if (@game)
 417         @game.monitoroff(MonitorHandler2.new(@player))
 418       end
 419       return :continue
 420     end
 421   end
 422
 423   # Command of HELP
 424   #
 425   class HelpCommand < Command
 426     def initialize(str, player)
 427       super
 428     end
 429
 430     def call
 431       @player.write_safe(
 432         %!##[HELP] available commands "%%WHO", "%%CHAT str", "%%GAME game_name +", "%%GAME game_name -"\n!)
 433       return :continue
 434     end
 435   end
 436
 437   # Command of RATING
 438   #
 439   class RatingCommand < Command
 440     def initialize(str, player, rated_players)
 441       super(str, player)
 442       @rated_players = rated_players
 443     end
 444
 445     def call
 446       @rated_players.sort {|a,b| b.rate <=> a.rate}.each do |p|
 447         @player.write_safe("##[RATING] %s \t %4d @%s\n" %
 448                    [p.simple_player_id, p.rate, p.modified_at.strftime("%Y-%m-%d")])
 449       end
 450       @player.write_safe("##[RATING] +OK\n")
 451       return :continue
 452     end
 453   end
 454
 455   # Command of VERSION
 456   #
 457   class VersionCommand < Command
 458     def initialize(str, player)
 459       super
 460     end
 461
 462     def call
 463       @player.write_safe "##[VERSION] Shogi Server revision #{ShogiServer::Revision}\n"
 464       @player.write_safe("##[VERSION] +OK\n")
 465       return :continue
 466     end
 467   end
 468
 469   # Command of GAME
 470   #
 471   class GameCommand < Command
 472     def initialize(str, player)
 473       super
 474     end
 475
 476     def call
 477       if ((@player.status == "connected") || (@player.status == "game_waiting"))
 478         @player.status = "connected"
 479         @player.game_name = ""
 480       else
 481         @player.write_safe(sprintf("##[ERROR] you are in %s status. GAME is valid in connected or game_waiting status\n", @player.status))
 482       end
 483       return :continue
 484     end
 485   end
 486
 487   # Commando of game challenge
 488   # TODO make a test case
 489   #
 490   class GameChallengeCommand < Command
 491     def initialize(str, player, command_name, game_name, my_sente_str)
 492       super(str, player)
 493       @command_name = command_name
 494       @game_name    = game_name
 495       @my_sente_str = my_sente_str
 496       player.set_sente_from_str(@my_sente_str)
 497     end
 498
 499     def call
 500       if (! Login::good_game_name?(@game_name))
 501         @player.write_safe(sprintf("##[ERROR] bad game name: %s.\n", @game_name))
 502         if (/^(.+)-\d+-\d+F?$/ =~ @game_name)
 503           if Login::good_identifier?($1)
 504             # do nothing
 505           else
 506             @player.write_safe(sprintf("##[ERROR] invalid identifiers are found or too many characters are used.\n"))
 507           end
 508         else
 509           @player.write_safe(sprintf("##[ERROR] game name should consist of three parts like game-1500-60.\n"))
 510         end
 511         return :continue
 512       elsif ((@player.status == "connected") || (@player.status == "game_waiting"))
 513         ## continue
 514       else
 515         @player.write_safe(sprintf("##[ERROR] you are in %s status. GAME is valid in connected or game_waiting status\n", @player.status))
 516         return :continue
 517       end
 518
 519       rival = nil
 520       if (League::Floodgate.game_name?(@game_name))
 521         if (@my_sente_str != "*")
 522           @player.write_safe(sprintf("##[ERROR] You are not allowed to specify TEBAN %s for the game %s\n", @my_sente_str, @game_name))
 523           return :continue
 524         end
 525         @player.sente = nil
 526       else
 527         rival = $league.find_rival(@player, @game_name)
 528         if rival.instance_of?(Symbol)
 529           # An error happened. rival is not a player instance, but an error
 530           # symobl that must be returned to the main routine immediately.
 531           return rival
 532         end
 533       end
 534
 535       if (rival)
 536         @player.game_name = @game_name
 537         Game::decide_turns(@player, @my_sente_str, rival)
 538
 539         if (Buoy.game_name?(@game_name))
 540           buoy = Buoy.new # TODO config
 541           if buoy.is_new_game?(@game_name)
 542             # The buoy game is not ready yet.
 543             # When the game is set, it will be started.
 544             @player.status = "game_waiting"
 545           else
 546             buoy_game = buoy.get_game(@game_name)
 547             if buoy_game.instance_of? NilBuoyGame
 548               # error. never reach
 549             end
 550
 551             moves_array = Board::split_moves(buoy_game.moves)
 552             board = Board.new
 553             begin
 554               board.set_from_moves(moves_array)
 555             rescue
 556               # it will never happen since moves have already been checked
 557               log_error "Failed to set up a buoy game: #{moves}"
 558               return :continue
 559             end
 560             buoy.decrement_count(buoy_game)
 561             Game::new(@player.game_name, @player, rival, board)
 562           end
 563         else
 564           klass = Login.handicapped_game_name?(@game_name) || Board
 565           board = klass.new
 566           board.initial
 567           Game::new(@player.game_name, @player, rival, board)
 568         end
 569       else # rival not found
 570         if (@command_name == "GAME")
 571           @player.status = "game_waiting"
 572           @player.game_name = @game_name
 573         else                # challenge
 574           @player.write_safe(sprintf("##[ERROR] can't find rival for %s\n", @game_name))
 575           @player.status = "connected"
 576           @player.game_name = ""
 577           @player.sente = nil
 578         end
 579       end
 580       return :continue
 581     end
 582   end
 583
 584   # Command of CHAT
 585   #
 586   class ChatCommand < Command
 587
 588     # players array of [name, player]
 589     #
 590     def initialize(str, player, message, players)
 591       super(str, player)
 592       @message = message
 593       @players = players
 594     end
 595
 596     def call
 597       @players.each do |name, p| # TODO player change name
 598         if (p.protocol != LoginCSA::PROTOCOL)
 599           p.write_safe(sprintf("##[CHAT][%s] %s\n", @player.name, @message))
 600         end
 601       end
 602       return :continue
 603     end
 604   end
 605
 606   # Command of LIST
 607   #
 608   class ListCommand < Command
 609
 610     # games array of [game_id, game]
 611     #
 612     def initialize(str, player, games)
 613       super(str, player)
 614       @games = games
 615     end
 616
 617     def call
 618       buf = Array::new
 619       @games.each do |id, game|
 620         buf.push(sprintf("##[LIST] %s\n", id))
 621       end
 622       buf.push("##[LIST] +OK\n")
 623       @player.write_safe(buf.join)
 624       return :continue
 625     end
 626   end
 627
 628   # Command of WHO
 629   #
 630   class WhoCommand < Command
 631
 632     # players array of [[name, player]]
 633     #
 634     def initialize(str, player, players)
 635       super(str, player)
 636       @players = players
 637     end
 638
 639     def call
 640       buf = Array::new
 641       @players.each do |name, p|
 642         buf.push(sprintf("##[WHO] %s\n", p.to_s))
 643       end
 644       buf.push("##[WHO] +OK\n")
 645       @player.write_safe(buf.join)
 646       return :continue
 647     end
 648   end
 649
 650   # Command of LOGOUT
 651   #
 652   class LogoutCommand < Command
 653     def initialize(str, player)
 654       super
 655     end
 656
 657     def call
 658       @player.status = "connected"
 659       @player.write_safe("LOGOUT:completed\n")
 660       return :return
 661     end
 662   end
 663
 664   # Command of CHALLENGE
 665   #
 666   class ChallengeCommand < Command
 667     def initialize(str, player)
 668       super
 669     end
 670
 671     def call
 672       # This command is only available for CSA's official testing server.
 673       # So, this means nothing for this program.
 674       @player.write_safe("CHALLENGE ACCEPTED\n")
 675       return :continue
 676     end
 677   end
 678
 679   # Command for a space
 680   #
 681   class SpaceCommand < Command
 682     def initialize(str, player)
 683       super
 684     end
 685
 686     def call
 687       ## ignore null string
 688       return :continue
 689     end
 690   end
 691
 692   # Command for an error
 693   #
 694   class ErrorCommand < Command
 695     def initialize(str, player, msg=nil)
 696       super(str, player)
 697       @msg = msg || "unknown command"
 698     end
 699     attr_reader :msg
 700
 701     def call
 702       cmd = @str.chomp
 703       # Aim to hide a possible password
 704       cmd.gsub!(/LOGIN\s*(\w+)\s+.*/i, 'LOGIN \1...')
 705       @msg = "##[ERROR] %s: %s\n" % [@msg, cmd]
 706       @player.write_safe(@msg)
 707       log_error(@msg)
 708       return :continue
 709     end
 710   end
 711
 712   #
 713   #
 714   class SetBuoyCommand < Command
 715
 716     def initialize(str, player, game_name, moves, count)
 717       super(str, player)
 718       @game_name = game_name
 719       @moves     = moves
 720       @count     = count
 721     end
 722
 723     def call
 724       unless (Buoy.game_name?(@game_name))
 725         @player.write_safe(sprintf("##[ERROR] wrong buoy game name: %s\n", @game_name))
 726         log_error "Received a wrong buoy game name: %s from %s." % [@game_name, @player.name]
 727         return :continue
 728       end
 729       buoy = Buoy.new
 730       unless buoy.is_new_game?(@game_name)
 731         @player.write_safe(sprintf("##[ERROR] duplicated buoy game name: %s\n", @game_name))
 732         log_error "Received duplicated buoy game name: %s from %s." % [@game_name, @player.name]
 733         return :continue
 734       end
 735       if @count < 1
 736         @player.write_safe(sprintf("##[ERROR] invalid count: %s\n", @count))
 737         log_error "Received an invalid count for a buoy game: %s, %s from %s." % [@count, @game_name, @player.name]
 738         return :continue
 739       end
 740
 741       # check moves
 742       moves_array = Board::split_moves(@moves)
 743       board = Board.new
 744       begin
 745         board.set_from_moves(moves_array)
 746       rescue
 747         raise WrongMoves
 748       end
 749
 750       buoy_game = BuoyGame.new(@game_name, @moves, @player.name, @count)
 751       buoy.add_game(buoy_game)
 752       @player.write_safe(sprintf("##[SETBUOY] +OK\n"))
 753       log_info("A buoy game was created: %s by %s" % [@game_name, @player.name])
 754
 755       # if two players are waiting for this buoy game, start it
 756       candidates = $league.find_all_players do |player|
 757         player.status == "game_waiting" &&
 758         player.game_name == @game_name &&
 759         player.name != @player.name
 760       end
 761       if candidates.empty?
 762         log_info("No players found for a buoy game. Wait for players: %s" % [@game_name])
 763         return :continue
 764       end
 765       p1 = candidates.first
 766       p2 = $league.find_rival(p1, @game_name)
 767       if p2.nil?
 768         log_info("No opponent found for a buoy game. Wait for the opponent: %s by %s" % [@game_name, p1.name])
 769         return :continue
 770       elsif p2.instance_of?(Symbol)
 771         # An error happened. rival is not a player instance, but an error
 772         # symobl that must be returned to the main routine immediately.
 773         return p2
 774       end
 775       # found two players: p1 and p2
 776       log_info("Starting a buoy game: %s with %s and %s" % [@game_name, p1.name, p2.name])
 777       buoy.decrement_count(buoy_game)
 778       Game::new(@game_name, p1, p2, board)
 779       return :continue
 780
 781     rescue WrongMoves => e
 782       @player.write_safe(sprintf("##[ERROR] wrong moves: %s\n", @moves))
 783       log_error "Received wrong moves: %s from %s. [%s]" % [@moves, @player.name, e.message]
 784       return :continue
 785     end
 786   end
 787
 788   #
 789   #
 790   class DeleteBuoyCommand < Command
 791     def initialize(str, player, game_name)
 792       super(str, player)
 793       @game_name = game_name
 794     end
 795
 796     def call
 797       buoy = Buoy.new
 798       buoy_game = buoy.get_game(@game_name)
 799       if buoy_game.instance_of?(NilBuoyGame)
 800         @player.write_safe(sprintf("##[ERROR] buoy game not found: %s\n", @game_name))
 801         log_error "Game name not found: %s by %s" % [@game_name, @player.name]
 802         return :continue
 803       end
 804
 805       if buoy_game.owner != @player.name
 806         @player.write_safe(sprintf("##[ERROR] you are not allowed to delete a buoy game that you did not set: %s\n", @game_name))
 807         log_error "%s are not allowed to delete a game: %s" % [@player.name, @game_name]
 808         return :continue
 809       end
 810
 811       buoy.delete_game(buoy_game)
 812       @player.write_safe(sprintf("##[DELETEBUOY] +OK\n"))
 813       log_info("A buoy game was deleted: %s" % [@game_name])
 814       return :continue
 815     end
 816   end
 817
 818   #
 819   #
 820   class GetBuoyCountCommand < Command
 821     def initialize(str, player, game_name)
 822       super(str, player)
 823       @game_name = game_name
 824     end
 825
 826     def call
 827       buoy = Buoy.new
 828       buoy_game = buoy.get_game(@game_name)
 829       if buoy_game.instance_of?(NilBuoyGame)
 830         @player.write_safe("##[GETBUOYCOUNT] -1\n")
 831       else
 832         @player.write_safe("##[GETBUOYCOUNT] %s\n" % [buoy_game.count])
 833       end
 834       @player.write_safe("##[GETBUOYCOUNT] +OK\n")
 835       return :continue
 836     end
 837   end
 838
 839   # %%FORK <source_game> <new_buoy_game> [<nth-move>]
 840   # Fork a new game from the posistion where the n-th (starting from 1) move
 841   # of a source game is played. The new game should be a valid buoy game
 842   # name. The default value of n is the position where the previous position
 843   # of the last one.
 844   #
 845   class ForkCommand < Command
 846     def initialize(str, player, source_game, new_buoy_game, nth_move)
 847       super(str, player)
 848       @source_game   = source_game
 849       @new_buoy_game = new_buoy_game
 850       @nth_move      = nth_move # may be nil
 851     end
 852     attr_reader :new_buoy_game
 853
 854     def decide_new_buoy_game_name
 855       name       = nil
 856       total_time = nil
 857       byo_time   = nil
 858
 859       if @source_game.split("+").size >= 2 &&
 860          /^([^-]+)-(\d+)-(\d+F?)/ =~ @source_game.split("+")[1]
 861         name       = $1
 862         total_time = $2
 863         byo_time   = $3
 864       end
 865       if name == nil || total_time == nil || byo_time == nil
 866         @player.write_safe(sprintf("##[ERROR] wrong source game name to make a new buoy game name: %s\n", @source_game))
 867         log_error "Received a wrong source game name to make a new buoy game name: %s from %s." % [@source_game, @player.name]
 868         return :continue
 869       end
 870       @new_buoy_game = "buoy_%s_%d-%s-%s" % [name, @nth_move, total_time, byo_time]
 871       @player.write_safe(sprintf("##[FORK]: new buoy game name: %s\n", @new_buoy_game))
 872       @player.write_safe("##[FORK] +OK\n")
 873     end
 874
 875     def call
 876       game = $league.games[@source_game]
 877       unless game
 878         @player.write_safe(sprintf("##[ERROR] wrong source game name: %s\n", @source_game))
 879         log_error "Received a wrong source game name: %s from %s." % [@source_game, @player.name]
 880         return :continue
 881       end
 882
 883       moves = game.read_moves # [["+7776FU","T2"],["-3334FU","T5"]]
 884       @nth_move = moves.size - 1 unless @nth_move
 885       if @nth_move > moves.size or @nth_move < 1
 886         @player.write_safe(sprintf("##[ERROR] number of moves to fork is out of range: %s.\n", moves.size))
 887         log_error "Number of moves to fork is out of range: %s [%s]" % [@nth_move, @player.name]
 888         return :continue
 889       end
 890       new_moves_str = ""
 891       moves[0...@nth_move].each do |m|
 892         new_moves_str << m.join(",")
 893       end
 894
 895       unless @new_buoy_game
 896         decide_new_buoy_game_name
 897       end
 898
 899       buoy_cmd = SetBuoyCommand.new(@str, @player, @new_buoy_game, new_moves_str, 1)
 900       return buoy_cmd.call
 901     end
 902   end
 903
 904 end # module ShogiServer