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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; An engine for interacting with Internet Chess Servers
;;
;; $Revision$
(require 'comint)
(require 'chess-network)
(defgroup chess-ics nil
"Engine for interacting with Internet Chess Servers."
:group 'chess-engine)
(defcustom chess-ics-server-list
'(("freechess.org" 5000))
"A list of servers to connect to.
The format of each entry is:
(SERVER PORT [HANDLE] [PASSWORD-OR-FILENAME] [HELPER] [HELPER ARGS...])"
:type '(repeat (list (string :tag "Server")
(integer :tag "Port")
(choice (const :tag "No password or ask" nil)
(string :tag "Password")
(file :tag "Filename"))
(choice (const :tag "Direct connection" nil)
(file :tag "Command"))
(choice (const :tag "No arguments" nil)
(repeat string))))
:group 'chess-ics)
(defvar chess-ics-handle)
(defvar chess-ics-ensure-ics12 nil)
(make-variable-buffer-local 'chess-ics-handle)
(make-variable-buffer-local 'chess-ics-ensure-ics12)
;; ICS12 format (with artificial line breaks):
;;
;; <12> rnbqkbnr pppppppp -------- -------- \
;; -------- -------- PPPPPPPP RNBQKBNR W \
;; -1 1 1 1 1 0 65 jwiegley GuestZYNJ \
;; 1 5 0 39 39 300 300 1 P/e2-e4 (0:00) e4 0 0 0
(defun chess-ics12-parse (string)
"Parse an ICS12 format string, and return a list of its info.
The list is comprised of: the ply the string represents, who is white,
who is black."
(let ((parts (split-string string " "))
(position (chess-pos-create t))
white black move)
(assert (= (length parts) 32))
;; first, handle the layout of the position
(dotimes (i 8)
(dotimes (j 8)
(let ((piece (aref (car parts) j)))
(unless (= piece ?-)
(chess-pos-set-piece position (chess-rf-to-index i j)
piece))))
(setq parts (cdr parts)))
;; next, the "side to move
(chess-pos-set-side-to-move position (string= (car parts) "W"))
(setq parts (cdr parts))
;; unknown
(setq parts (cdr parts))
;; castling rights?
(if (string= (car parts) "1")
(chess-pos-set-can-castle position ?K t))
(setq parts (cdr parts))
(if (string= (car parts) "1")
(chess-pos-set-can-castle position ?Q t))
(setq parts (cdr parts))
(if (string= (car parts) "1")
(chess-pos-set-can-castle position ?k t))
(setq parts (cdr parts))
(if (string= (car parts) "1")
(chess-pos-set-can-castle position ?q t))
(setq parts (cdr parts))
;; jww (2002-04-11): How is check indicated?
;; unknown
(setq parts (cdr parts))
(setq parts (cdr parts))
;; white player, black player
(setq white (car parts))
(setq parts (cdr parts))
(setq black (car parts))
(setq parts (cdr parts))
;; unknown
(setq parts (cdr parts))
(setq parts (cdr parts))
(setq parts (cdr parts))
;; material values for each side
(setq parts (cdr parts))
(setq parts (cdr parts))
;; starting time each side
(setq parts (cdr parts))
(setq parts (cdr parts))
;; unknown
(setq parts (cdr parts))
;; move in elaborated notation
(setq parts (cdr parts))
;; time elapsed
(setq parts (cdr parts))
;; move in algebraic notation
(setq move (unless (string= (car parts) "none")
(car parts)))
(setq parts (cdr parts))
;; unknown
(setq parts (cdr parts))
(setq parts (cdr parts))
(setq parts (cdr parts))
(list position move white black)))
(defun chess-ics-handle-move ()
(let ((chess-engine-handling-event t)
(begin (match-beginning 1))
(end (match-end 1))
(info (chess-ics12-parse (match-string 3))))
(if (and (chess-game-data chess-engine-game 'active)
(> (chess-game-index chess-engine-game) 0))
(when (and (cadr info)
(eq (chess-pos-side-to-move (car info))
(chess-game-data chess-engine-game 'my-color)))
(chess-game-move chess-engine-game
(chess-algebraic-to-ply
(chess-ply-pos
(car (last (chess-game-plies chess-engine-game))))
(cadr info) t))
(assert (equal (car info) (chess-engine-position nil))))
(let ((chess-game-inhibit-events t) plies)
(chess-game-set-data chess-engine-game
'my-color (string= (nth 2 info) chess-ics-handle))
(chess-game-set-data chess-engine-game 'active t)
(chess-game-set-start-position chess-engine-game (car info)))
(chess-game-run-hooks chess-engine-game 'orient))
(delete-region begin end)
t))
(defvar chess-ics-regexp-alist
(list (cons "\\(\\(\n*fics%\n*\\)?<12> \\(.+\\)\\)\n"
'chess-ics-handle-move)
(cons "Challenge: \\(\\S-+\\) \\S-+ \\S-+ \\S-+ .+"
(function
(lambda ()
(funcall chess-engine-response-handler 'match
(match-string 1)))))))
(chess-message-catalog 'english
'((ics-server-prompt . "Connect to chess server: ")
(ics-connecting . "Connecting to Internet Chess Server '%s'...")
(ics-connected . "Connecting to Internet Chess Server '%s'...done")
(challenge-whom . "Whom would you like challenge? ")))
(defun chess-ics-handler (event &rest args)
(cond
((eq event 'initialize)
(kill-buffer (current-buffer))
(let ((server
(if (= (length chess-ics-server-list) 1)
(car chess-ics-server-list)
(assoc (completing-read (chess-string 'ics-server-prompt)
chess-ics-server-list
nil t (caar chess-ics-server-list))
chess-ics-server-list))))
(chess-message 'ics-connecting (car server))
(let ((buf (apply 'make-comint "chess-ics"
(if (nth 3 server)
(cons (nth 4 server) (nth 5 server))
(list (cons (nth 0 server) (nth 1 server)))))))
(chess-message 'ics-connected (car server))
(display-buffer buf)
(set-buffer buf)
(add-hook 'comint-output-filter-functions 'chess-ics-filter t t)
(set (make-local-variable 'comint-preoutput-filter-functions)
'(chess-ics-strip))
(if (nth 2 server)
(progn
(setq chess-ics-handle (nth 2 server))
(comint-send-string (concat chess-ics-handle "\n"))
(let ((pass (nth 3 server)))
(when pass
(if (file-readable-p pass)
(setq pass (with-temp-buffer
(insert-file-contents file)
(buffer-string))))
(comint-send-string (concat pass "\n")))))
;; jww (2002-04-13): Have to parse out the allocated Guest
;; name from the output
(comint-send-string "guest\n\n"))))
nil)
((eq event 'match)
(setq chess-engine-pending-offer 'match)
(chess-engine-send
nil (format "match %s\n"
(read-string (chess-string 'challenge-whom)))))
((eq event 'move)
(unless chess-ics-ensure-ics12
(chess-engine-send nil "set style 12\n")
(setq chess-ics-ensure-ics12 t))
(chess-network-handler 'move (car args)))
((eq event 'send)
(comint-send-string (get-buffer-process (current-buffer))
(car args)))
(t
(apply 'chess-network-handler event args))))
(defun chess-ics-filter (string)
(save-excursion
(if chess-engine-last-pos
(goto-char chess-engine-last-pos)
(goto-char (point-min)))
(unwind-protect
(while (and (not (eobp))
(/= (line-end-position) (point-max)))
(let ((triggers chess-ics-regexp-alist))
(while triggers
;; this could be accelerated by joining
;; together the regexps
(if (and (looking-at (concat "[^\n\r]*" (caar triggers)))
(funcall (cdar triggers)))
(setq triggers nil)
(setq triggers (cdr triggers)))))
(forward-line))
(setq chess-engine-last-pos (point)))))
(defun chess-ics-strip (string)
(while (string-match "[\r\a]" string)
(setq string (replace-match "" t t string)))
string)
(provide 'chess-ics)
;;; chess-ics.el ends here
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