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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; Play against an opponent over the network
;;
;; $Revision$
(require 'chess-engine)
(require 'chess-fen)
(require 'chess-algebraic)
(defvar chess-network-now-moving nil)
(defvar chess-network-regexp-alist
(list (cons (concat "\\(Black\\|White\\):\\s-*"
chess-algebraic-regexp "\\s-+")
'chess-network-perform-move)
(cons "PASS"
(function
(lambda ()
(message "Your opponent has passed the move to you"))))
(cons "CONNECT\\s-+\\(.*\\)"
(function
(lambda ()
;; jww (2002-04-07): Set the appropriate Black or
;; White tag at this point
(message "Your opponent, %s, has connected"
(match-string 1)))))
(cons "SETBOARD\\s-+\\(.*\\)"
(function
(lambda ()
(let* ((position (chess-fen-to-pos (match-string 1)))
(ply (chess-ply-create position)))
(chess-game-set-plies (chess-engine-game nil)
(list ply))))))
(cons "QUIT"
(function
(lambda ()
(message "Your opponent has quit playing"))))))
(defun chess-network-perform-move ()
(let ((position (chess-engine-position nil))
(move (match-string 2)) ply)
(when (string= (if (chess-pos-side-to-move position)
"White" "Black")
(match-string 1))
(setq ply (chess-algebraic-to-ply position move))
(unless ply
(error "Could not convert engine move: %s" move))
(let ((chess-network-now-moving t))
(funcall chess-engine-response-handler 'move ply)))))
(defun chess-network-handler (event &rest args)
"Initialize the network chess engine."
(cond
((eq event 'initialize)
(let ((which (read-char "Are you the c)lient or s)erver? "))
proc)
(message "Starting network client/server...")
(setq proc (if (eq which ?s)
(start-process "*chess-network*"
(current-buffer) "/usr/bin/nc"
"-l" "-p" (read-string "Port: "))
(open-network-stream "*chess-network*" (current-buffer)
(read-string "Host: ")
(read-string "Port: "))))
(if (eq which ?s)
(message "Now waiting for your opponent to connect...")
(process-send-string proc (format "CONNECT %s\n" (user-full-name)))
(message "You have connected; pass now or make your move."))
proc))
((eq event 'shutdown)
(chess-engine-send nil "QUIT\n"))
((eq event 'setup)
(chess-engine-send nil (format "SETBOARD %s\n"
(chess-pos-to-fen (car args)))))
((eq event 'pass)
(chess-engine-send nil "PASS\n"))
((eq event 'move)
(unless chess-network-now-moving
(chess-engine-send
nil (concat (if (chess-pos-side-to-move (chess-ply-pos (car args)))
"White:"
"Black:")
(chess-ply-to-algebraic (car args))
"\n"))))))
(provide 'chess-network)
;;; chess-network.el ends here
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