3 (defparameter *version* "0.0.1")
9 (defvar *default-empire-server* "localhost")
10 (defvar *default-empire-server-port* 6665)
12 (defclass connection ()
23 :initform "Unknown server")
27 :initform *default-empire-server-port*)
31 :documentation "Slot to store socket (for internal use only).")
34 :accessor network-stream
35 :documentation "Stream used to talk to the empire server.")
37 :accessor connection-handler
39 :documentation "Handler function for incoming messages")
41 :accessor connection-mode
43 :documentation "TODO(gefla)")
47 :documentation "web session to which this connection belongs")))
49 (defun make-connection (&key (user nil)
51 (server-name *default-empire-server*)
52 (server-port *default-empire-server-port*)
56 (make-instance 'connection
59 :server-name server-name
60 :server-port server-port
62 :stream network-stream
66 (defun connect (&key (user nil)
68 (server-name *default-empire-server*)
69 (server-port *default-empire-server-port*)
71 "Connect to server and return a connection object."
72 (let* ((socket (usocket:socket-connect server-name server-port))
73 (stream (usocket:socket-stream socket))
74 (connection (make-connection :user user
77 :network-stream stream
78 :server-name server-name
79 :server-port server-port
81 (handler (spawn-with-name (format nil "empire-handler-~a" user)
82 #'handle-connection connection)))
83 (setf (connection-handler connection) handler)
84 (empire-log:info "~a: connect" connection)
87 (defgeneric quit (connection))
88 (defgeneric handle-connection (connection))
89 (defgeneric read-message (connection))
90 (defgeneric send-message (connection message))
91 (defgeneric reconnect (conncetion))
93 (defmethod reconnect ((c connection))
94 (with-slots (server-name server-port user password socket stream connection-handler) c
95 (let* ((sock (usocket:socket-connect server-name server-port))
96 (s (usocket:socket-stream sock)))
99 connection-handler (spawn-with-name (format nil "empire-handler-~a" user)
100 #'handle-connection c))))
101 (empire-log:info "~a: reconnect" c))
103 (defparameter +C_CMDOK+ "0")
104 (defparameter +C_DATA+ "1")
105 (defparameter +C_INIT+ "2")
106 (defparameter +C_EXIT+ "3")
107 (defparameter +C_FLUSH+ "4")
108 (defparameter +C_NOECHO+ "5")
109 (defparameter +C_PROMPT+ "6")
110 (defparameter +C_ABORT+ "7")
111 (defparameter +C_REDIR+ "8")
112 (defparameter +C_PIPE+ "9")
113 (defparameter +C_CMDERR+ "a")
114 (defparameter +C_BADCMD+ "b")
115 (defparameter +C_EXECUTE+ "c")
116 (defparameter +C_FLASH+ "d")
117 (defparameter +C_INFORM+ "e")
119 (defclass base-mode ()
120 ((connection :initarg :connection :accessor connection)))
121 (defclass init-mode (base-mode)
122 ((play-sent-p :initform nil
123 :documentation "Have we already sent the play command?")))
124 (defclass play-mode (base-mode) nil)
126 (defun make-mode (connection mode)
127 (make-instance mode :connection connection))
129 (defgeneric set-new-mode (base-mode new-mode))
130 (defmethod set-new-mode ((m base-mode) new-mode)
131 (let* ((c (connection m))
132 (mode (make-mode c new-mode)))
133 (empire-log:info "~a: set-new-mode ~a -> ~a" c (connection-mode c) new-mode)
134 (setf (connection-mode c) mode)))
136 (defgeneric handle-data (base-mode message))
137 (defgeneric handle-init (base-mode message))
138 (defgeneric handle-exit (base-mode message))
139 (defgeneric handle-prompt (base-mode message))
140 (defgeneric handle-flush (base-mode message))
141 (defgeneric handle-simple-message (base-mode message))
142 (defgeneric handle-ignore (base-mode message))
144 (defmethod handle-init ((m init-mode) message)
145 (declare (ignorable message))
146 (with-slots (play-sent-p) m
147 (if (not play-sent-p)
148 (let ((c (connection m)))
150 (setf play-sent-p t))
151 (set-new-mode m 'play-mode))))
153 (defmethod handle-exit ((m init-mode) message)
154 (declare (ignorable message))
157 (defmethod handle-exit ((m play-mode) message)
158 (declare (ignorable message))
159 (quit (connection m)))
161 (defmethod handle-data ((m play-mode) message)
162 (let* ((c (connection m)))
163 (empire-web:data (session c) message)))
165 (defmethod handle-simple-message ((m play-mode) message)
166 (let* ((c (connection m)))
167 (empire-web:data (session c) message)))
169 (defmethod handle-flush ((m play-mode) message)
170 (let* ((c (connection m)))
171 (empire-web:prompt (session c) message)))
173 (defmethod handle-prompt ((m play-mode) message)
174 (let* ((c (connection m)))
175 (with-input-from-string (s message)
176 (let* ((minutes (read s)) ;;FIXME DANGEROUS
178 (empire-web:prompt (session c)
179 (format nil "[~a,~a]: " minutes btus))))))
181 (defmethod handle-ignore ((m init-mode) message)
182 (declare (ignorable message))
185 (defparameter *line-type-dispatch*
186 (list `(,+C_DATA+ . handle-data)
187 `(,+C_INIT+ . handle-init)
188 `(,+C_EXIT+ . handle-exit)
189 `(,+C_FLUSH+ . handle-flush)
190 `(,+C_BADCMD+ . handle-simple-message)
191 `(,+C_FLASH+ . handle-simple-message)
192 `(,+C_CMDOK+ . handle-ignore)
193 `(,+C_PROMPT+ . handle-prompt)))
195 (defun parse-server-line (line)
196 (let* ((first-space-index
197 (loop for i from 0 below (length line)
198 if (eq (char line i) #\Space)
200 (message-type (subseq line 0 first-space-index))
201 (message (if first-space-index
202 (subseq line (+ first-space-index 1))
204 (values message message-type)))
206 (defmethod handle-connection ((c connection))
207 (setf (connection-mode c) (make-mode c 'init-mode))
208 (loop while (read-message c)))
210 (defun lookup-handler (message-type)
211 (cdr (assoc message-type *line-type-dispatch* :test 'string=)))
213 (define-condition no-handler (error)
214 ((mode :initarg :mode)
215 (type :initarg :type))
216 (:report (lambda (condition stream)
217 (with-slots (mode type) condition
218 (format stream "No handler for ~a in mode ~a."
220 (defmethod read-message ((c connection))
222 (let* ((s (network-stream c))
223 (line (read-line s)))
224 (empire-log:info "~a: < ~a" c line)
225 (multiple-value-bind (message type) (parse-server-line line)
226 (let ((handler (lookup-handler type))
227 (mode (connection-mode c)))
229 (funcall handler mode message)
230 (error 'no-handler :mode mode :type type))))
232 (sb-int:closed-stream-error () nil)
233 (end-of-file () nil)))
235 (defun raw-send-message (s message)
236 (write-sequence message s)
240 (defgeneric send-message-one (connection string))
241 (defmethod send-message-one ((c connection) message)
242 (empire-log:info "~a: > ~a" c message)
243 (let ((s (network-stream c)))
244 (raw-send-message s message)))
246 (defmethod send-message ((c connection) message)
250 while (and (not sent-p)
254 (send-message-one c message)
256 (sb-int:closed-stream-error ()
259 (empire-log:info "~a: Connection close - retrying (~a tries left)" c tries)
263 (defparameter +special-command-char+ #\;)
265 (defun special-command-p (line)
266 (char= +special-command-char+ (aref line 0)))
268 (defmethod special-xup ((c connection))
271 (defmethod special-command ((c connection) line)
272 (cond ((string= line "xup") (special-xup c))
273 (t (empire-web:data (session c) "Unknown special command")))
276 (defmethod command ((c connection) line)
277 (cond ((special-command-p line) (special-command c (subseq line 1)))
278 (t (send-message c line))))
280 (defgeneric login-and-play (connection))
281 (defmethod login-and-play ((c connection))
282 (send-message-one c (format nil "client eow ~a" *version*))
283 (send-message-one c "user FIXME")
284 (with-slots (user password) c
285 (send-message-one c (format nil "coun ~a" user))
286 (send-message-one c (format nil "pass ~a" password)))
287 (send-message-one c "kill")
288 (send-message-one c "play"))
290 (defmethod quit ((c connection))
291 (usocket:socket-close (socket c)))
295 (defvar *l1* "2 Empire server ready")
296 ;; (parse-server-line *l1*)