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")
50 :initform (locked-queue:create)
51 :documentation "lines outstanding to be sent at next prompt")))
53 (defun make-connection (&key (user nil)
55 (server-name *default-empire-server*)
56 (server-port *default-empire-server-port*)
60 (make-instance 'connection
63 :server-name server-name
64 :server-port server-port
66 :stream network-stream
70 (defun connect (&key (user nil)
72 (server-name *default-empire-server*)
73 (server-port *default-empire-server-port*)
75 "Connect to server and return a connection object."
76 (let* ((socket (usocket:socket-connect server-name server-port))
77 (stream (usocket:socket-stream socket))
78 (connection (make-connection :user user
81 :network-stream stream
82 :server-name server-name
83 :server-port server-port
85 (handler (spawn-with-name (format nil "empire-handler-~a" user)
86 #'handle-connection connection)))
87 (setf (connection-handler connection) handler)
88 (empire-log:info "~a: connect" connection)
91 (defgeneric quit (connection))
92 (defgeneric handle-connection (connection))
93 (defgeneric read-message (connection))
94 (defgeneric send-message (connection message &key next-mode))
95 (defgeneric connected-p (connection))
96 (defgeneric reconnect (conncetion))
98 (defmethod connected-p ((c connection))
99 (sb-thread:thread-alive-p (connection-handler c)))
101 (defmethod reconnect ((c connection))
102 (with-slots (server-name server-port user password socket stream connection-handler) c
103 (let* ((sock (usocket:socket-connect server-name server-port))
104 (s (usocket:socket-stream sock)))
107 connection-handler (spawn-with-name (format nil "empire-handler-~a" user)
108 #'handle-connection c))))
109 (empire-log:info "~a: reconnect" c))
111 (defparameter +C_CMDOK+ "0")
112 (defparameter +C_DATA+ "1")
113 (defparameter +C_INIT+ "2")
114 (defparameter +C_EXIT+ "3")
115 (defparameter +C_FLUSH+ "4")
116 (defparameter +C_NOECHO+ "5")
117 (defparameter +C_PROMPT+ "6")
118 (defparameter +C_ABORT+ "7")
119 (defparameter +C_REDIR+ "8")
120 (defparameter +C_PIPE+ "9")
121 (defparameter +C_CMDERR+ "a")
122 (defparameter +C_BADCMD+ "b")
123 (defparameter +C_EXECUTE+ "c")
124 (defparameter +C_FLASH+ "d")
125 (defparameter +C_INFORM+ "e")
127 (defclass base-mode ()
128 ((connection :initarg :connection :accessor connection)))
129 (defclass init-mode (base-mode)
130 ((play-sent-p :initform nil
131 :documentation "Have we already sent the play command?")))
132 (defclass play-mode (base-mode) nil)
134 (defun make-mode (connection mode)
135 (make-instance mode :connection connection))
137 (defgeneric set-new-mode (base-mode new-mode))
138 (defmethod set-new-mode ((m base-mode) new-mode)
139 (let* ((c (connection m))
140 (mode (make-mode c new-mode)))
141 (empire-log:info "~a: set-new-mode ~a -> ~a" c (connection-mode c) new-mode)
142 (setf (connection-mode c) mode)))
144 (defgeneric handle-data (base-mode message))
145 (defgeneric handle-init (base-mode message))
146 (defgeneric handle-exit (base-mode message))
147 (defgeneric handle-prompt (base-mode message))
148 (defgeneric handle-flush (base-mode message))
149 (defgeneric handle-simple-message (base-mode message))
150 (defgeneric handle-ignore (base-mode message))
152 (defmethod handle-init ((m init-mode) message)
153 (declare (ignorable message))
154 (with-slots (play-sent-p) m
155 (if (not play-sent-p)
156 (let ((c (connection m)))
158 (setf play-sent-p t))
159 (set-new-mode m 'play-mode))))
161 (defmethod handle-exit ((m init-mode) message)
162 (declare (ignorable message))
165 (defmethod handle-exit ((m play-mode) message)
166 (declare (ignorable message))
167 (quit (connection m)))
169 (defmethod handle-data ((m play-mode) message)
170 (let* ((c (connection m)))
171 (empire-web:data (session c) message)))
173 (defmethod handle-simple-message ((m play-mode) message)
174 (let* ((c (connection m)))
175 (empire-web:data (session c) message)))
177 (defmethod handle-flush ((m play-mode) message)
178 (let* ((c (connection m)))
179 (empire-web:prompt (session c) message)
182 (defmethod send-next-line ((c connection))
183 (let ((next-event (locked-queue:dequeue (send-queue c))))
185 (string (send-message-one c next-event))
186 (cons (let ((message (car next-event))
187 (mode (cdr next-event)))
188 (send-message-one c message)
189 (set-new-mode c mode))))))
191 (defmethod handle-prompt ((m play-mode) message)
192 (let* ((c (connection m)))
193 (with-input-from-string (s message)
194 (let* ((minutes (read s)) ;;FIXME DANGEROUS
196 (empire-web:prompt (session c)
197 (format nil "[~a,~a]: " minutes btus))))
200 (defmethod handle-ignore ((m init-mode) message)
201 (declare (ignorable message))
204 (defparameter *line-type-dispatch*
205 (list `(,+C_DATA+ . handle-data)
206 `(,+C_INIT+ . handle-init)
207 `(,+C_EXIT+ . handle-exit)
208 `(,+C_FLUSH+ . handle-flush)
209 `(,+C_BADCMD+ . handle-simple-message)
210 `(,+C_FLASH+ . handle-simple-message)
211 `(,+C_CMDOK+ . handle-ignore)
212 `(,+C_PROMPT+ . handle-prompt)))
214 (defun parse-server-line (line)
215 (let* ((first-space-index
216 (loop for i from 0 below (length line)
217 if (eq (char line i) #\Space)
219 (message-type (subseq line 0 first-space-index))
220 (message (if first-space-index
221 (subseq line (+ first-space-index 1))
223 (values message message-type)))
225 (defmethod handle-connection ((c connection))
226 (setf (connection-mode c) (make-mode c 'init-mode))
227 (loop while (read-message c)))
229 (defun lookup-handler (message-type)
230 (cdr (assoc message-type *line-type-dispatch* :test 'string=)))
232 (define-condition no-handler (error)
233 ((mode :initarg :mode)
234 (type :initarg :type))
235 (:report (lambda (condition stream)
236 (with-slots (mode type) condition
237 (format stream "No handler for ~a in mode ~a."
239 (defmethod read-message ((c connection))
241 (let* ((s (network-stream c))
242 (line (read-line s)))
243 (empire-log:info "~a: < ~a" c line)
244 (multiple-value-bind (message type) (parse-server-line line)
245 (let ((handler (lookup-handler type))
246 (mode (connection-mode c)))
248 (funcall handler mode message)
249 (error 'no-handler :mode mode :type type))))
251 (sb-int:closed-stream-error () nil)
252 (end-of-file () nil)))
254 (defun raw-send-message (s message)
255 (write-sequence message s)
259 (defgeneric send-message-one (connection string))
260 (defmethod send-message-one ((c connection) message)
261 (empire-log:info "~a: > ~a" c message)
262 (let ((s (network-stream c)))
263 (raw-send-message s message)))
265 (defmethod send-message ((c connection) message &key next-mode)
266 (if (not (connected-p c))
269 (locked-queue:enqueue (send-queue c) (cons message next-mode))
270 (locked-queue:enqueue (send-queue c) message)))
272 (defparameter +special-command-char+ #\;)
274 (defun special-command-p (line)
275 (and (> (length line) 0)
276 (char= +special-command-char+ (aref line 0))))
278 (defmethod special-xup ((c connection))
281 (defmethod special-command ((c connection) line)
282 (cond ((string= line "xup") (special-xup c))
283 (t (empire-web:data (session c) "Unknown special command")))
286 (defmethod command ((c connection) line)
287 (cond ((special-command-p line) (special-command c (subseq line 1)))
288 (t (send-message c line))))
290 (defgeneric login-and-play (connection))
291 (defmethod login-and-play ((c connection))
292 (send-message-one c (format nil "client eow ~a" *version*))
293 (send-message-one c "user FIXME")
294 (with-slots (user password) c
295 (send-message-one c (format nil "coun ~a" user))
296 (send-message-one c (format nil "pass ~a" password)))
297 (send-message-one c "kill")
298 (send-message-one c "play"))
300 (defmethod quit ((c connection))
301 (usocket:socket-close (socket c)))
305 (defvar *l1* "2 Empire server ready")
306 ;; (parse-server-line *l1*)