3 (defparameter *version* "0.0.1")
9 (defvar *default-empire-server* "localhost")
10 (defvar *default-empire-server-port* 6665)
12 (defvar *last-active-connection* nil)
14 (defclass connection ()
25 :initform "Unknown server")
29 :initform *default-empire-server-port*)
33 :documentation "Slot to store socket (for internal use only).")
36 :accessor network-stream
37 :documentation "Stream used to talk to the empire server.")
39 :accessor connection-handler
41 :documentation "Handler function for incoming messages")
43 :accessor connection-mode
45 :documentation "TODO(gefla)")
49 :documentation "web session to which this connection belongs")
52 :initform (locked-queue:create)
53 :documentation "lines outstanding to be sent at next prompt")
54 (xdump :accessor xdump :initform (xdump:make-parser))))
56 (defun make-connection (&key (user nil)
58 (server-name *default-empire-server*)
59 (server-port *default-empire-server-port*)
63 (make-instance 'connection
66 :server-name server-name
67 :server-port server-port
69 :stream network-stream
73 (defun connect (&key (user nil)
75 (server-name *default-empire-server*)
76 (server-port *default-empire-server-port*)
78 "Connect to server and return a connection object."
79 (let* ((socket (usocket:socket-connect server-name server-port))
80 (stream (usocket:socket-stream socket))
81 (connection (make-connection :user user
84 :network-stream stream
85 :server-name server-name
86 :server-port server-port
88 (handler (spawn-with-name (format nil "empire-handler-~a" user)
89 #'handle-connection connection)))
90 (setf (connection-handler connection) handler)
91 (empire-log:info "~a: connect" connection)
94 (defgeneric quit (connection))
95 (defgeneric handle-connection (connection))
96 (defgeneric read-message (connection))
97 (defgeneric send-message (connection message &key next-mode))
98 (defgeneric connected-p (connection))
99 (defgeneric reconnect (conncetion))
101 (defmethod connected-p ((c connection))
102 (sb-thread:thread-alive-p (connection-handler c)))
104 (defmethod reconnect ((c connection))
105 (with-slots (server-name server-port user password socket stream connection-handler) c
106 (let* ((sock (usocket:socket-connect server-name server-port))
107 (s (usocket:socket-stream sock)))
110 connection-handler (spawn-with-name (format nil "empire-handler-~a" user)
111 #'handle-connection c))))
112 (empire-log:info "~a: reconnect" c))
114 (defparameter +C_CMDOK+ "0")
115 (defparameter +C_DATA+ "1")
116 (defparameter +C_INIT+ "2")
117 (defparameter +C_EXIT+ "3")
118 (defparameter +C_FLUSH+ "4")
119 (defparameter +C_NOECHO+ "5")
120 (defparameter +C_PROMPT+ "6")
121 (defparameter +C_ABORT+ "7")
122 (defparameter +C_REDIR+ "8")
123 (defparameter +C_PIPE+ "9")
124 (defparameter +C_CMDERR+ "a")
125 (defparameter +C_BADCMD+ "b")
126 (defparameter +C_EXECUTE+ "c")
127 (defparameter +C_FLASH+ "d")
128 (defparameter +C_INFORM+ "e")
130 (defclass base-mode ()
131 ((connection :initarg :connection :accessor connection)))
132 (defclass init-mode (base-mode)
133 ((phase :initform :initial
134 :documentation "Initialization phase")))
135 (defclass play-mode (base-mode) nil)
137 (defun make-mode (connection mode)
138 (make-instance mode :connection connection))
140 (defgeneric set-new-mode (base-mode new-mode))
141 (defmethod set-new-mode ((m base-mode) new-mode)
142 (let* ((c (connection m))
143 (mode (make-mode c new-mode)))
144 (empire-log:info "~a: set-new-mode ~a -> ~a" c (connection-mode c) new-mode)
145 (setf (connection-mode c) mode)))
147 (defgeneric handle-cmdok (base-mode message))
148 (defgeneric handle-data (base-mode message))
149 (defgeneric handle-init (base-mode message))
150 (defgeneric handle-exit (base-mode message))
151 (defgeneric handle-prompt (base-mode message))
152 (defgeneric handle-flush (base-mode message))
153 (defgeneric handle-simple-message (base-mode message))
154 (defgeneric handle-ignore (base-mode message))
156 (defmethod handle-init ((m init-mode) message)
157 (declare (ignorable message))
158 (with-slots (phase connection) m
160 (:initial (handle-cmdok m message))
161 (:play-sent (set-new-mode m 'play-mode)))))
163 (defmethod handle-cmdok ((m init-mode) message)
164 (declare (ignorable message))
165 (with-slots (phase connection) m
166 (flet ((init-phase (mode send-args next-phase)
167 (with-slots (phase connection) mode
168 (send-message-one connection (apply #'format nil send-args))
169 (setf phase next-phase))))
170 (with-slots (user password) (connection m)
172 (:initial (init-phase m `("client eow ~a" ,*version*) :client-sent))
173 (:client-sent (init-phase m `("coun ~a" ,user) :coun-sent))
174 (:coun-sent (init-phase m `("pass ~a" ,password) :pass-sent))
175 (:pass-sent (init-phase m '("play") :play-sent)))))))
177 (defmethod handle-exit ((m init-mode) message)
178 (declare (ignorable message))
179 (with-slots (phase connection) m
181 (:play-sent (send-message-one connection "kill")
182 (setf phase :kill-sent))
183 (:kill-sent (send-message-one connection "play")
184 (setf phase :play-sent)))))
186 (defmethod handle-data ((m init-mode) message)
187 (declare (ignorable message))
190 (defmethod handle-exit ((m play-mode) message)
191 (declare (ignorable message))
192 (quit (connection m)))
194 (defmethod handle-data ((m play-mode) message)
195 (let* ((c (connection m)))
196 (empire-web:data (session c) message)))
198 (defmethod handle-simple-message ((m play-mode) message)
199 (let* ((c (connection m)))
200 (empire-web:data (session c) message)))
202 (defmethod handle-flush ((m play-mode) message)
203 (let* ((c (connection m)))
204 (empire-web:prompt (session c) message)
207 (defmethod send-next-line ((c connection))
208 (let ((next-event (locked-queue:dequeue (send-queue c))))
209 (etypecase next-event
210 (string (send-message-one c next-event))
211 (cons (let ((message (car next-event))
212 (mode (cdr next-event)))
213 (send-message-one c message)
214 (set-new-mode (connection-mode c) mode))))))
216 (defun read-no-eval (stream)
217 (let ((*read-eval* nil))
220 (defmethod handle-prompt ((m play-mode) message)
221 (let* ((c (connection m)))
222 (with-input-from-string (s message)
223 (let* ((minutes (read-no-eval s))
224 (btus (read-no-eval s)))
225 (empire-web:prompt (session c)
226 (format nil "[~a,~a]: " minutes btus))))
229 (defmethod handle-ignore ((m init-mode) message)
230 (declare (ignorable message))
233 (defparameter *line-type-dispatch*
234 (list `(,+C_DATA+ . handle-data)
235 `(,+C_INIT+ . handle-init)
236 `(,+C_EXIT+ . handle-exit)
237 `(,+C_FLUSH+ . handle-flush)
238 `(,+C_BADCMD+ . handle-simple-message)
239 `(,+C_FLASH+ . handle-simple-message)
240 `(,+C_CMDOK+ . handle-cmdok)
241 `(,+C_PROMPT+ . handle-prompt)))
243 (defun parse-server-line (line)
244 (let* ((first-space-index
245 (loop for i from 0 below (length line)
246 if (eq (char line i) #\Space)
248 (message-type (subseq line 0 first-space-index))
249 (message (if first-space-index
250 (subseq line (+ first-space-index 1))
252 (values message message-type)))
254 (defmethod handle-connection ((c connection))
255 (setf (connection-mode c) (make-mode c 'init-mode))
256 (loop while (read-message c)))
258 (defun lookup-handler (message-type)
259 (cdr (assoc message-type *line-type-dispatch* :test 'string=)))
261 (define-condition no-handler (error)
262 ((mode :initarg :mode)
263 (type :initarg :type))
264 (:report (lambda (condition stream)
265 (with-slots (mode type) condition
266 (format stream "No handler for ~a in mode ~a."
268 (defmethod read-message ((c connection))
270 (let* ((s (network-stream c))
271 (line (read-line s)))
272 (empire-log:info "~a: < ~a" c line)
273 (setf *last-active-connection* c)
274 (multiple-value-bind (message type) (parse-server-line line)
275 (let ((handler (lookup-handler type))
276 (mode (connection-mode c)))
278 (funcall handler mode message)
279 (error 'no-handler :mode mode :type type))))
281 (sb-int:closed-stream-error () nil)
282 (sb-int:simple-stream-error () nil)
283 (end-of-file () nil)))
285 (defun raw-send-message (s message)
286 (write-sequence message s)
290 (defgeneric send-message-one (connection string))
291 (defmethod send-message-one ((c connection) message)
292 (empire-log:info "~a: > ~a" c message)
293 (setf *last-active-connection* c)
294 (let ((s (network-stream c)))
295 (raw-send-message s message)))
297 (defmethod send-message ((c connection) message &key next-mode)
298 (if (not (connected-p c))
301 (locked-queue:enqueue (send-queue c) (cons message next-mode))
302 (locked-queue:enqueue (send-queue c) message)))
304 (defparameter +special-command-char+ #\;)
306 (defun special-command-p (line)
307 (and (> (length line) 0)
308 (char= +special-command-char+ (aref line 0))))
310 (defclass xdump-mode (play-mode)
311 ((phase :initform :meta-meta)
312 (dump-queue :initform nil)
313 (dump-index :initform 0)))
315 (defmethod handle-data ((m xdump-mode) message)
316 (with-slots (connection phase dump-queue dump-index) m
317 (xdump:with-parser (xdump connection)
318 (if (xdump:parse-line (xdump connection) message)
319 ;;XXX consider something like a 'pop-mode function
322 (setf phase :meta-table)
323 (send-message connection "xdump meta table"))
325 (setf phase :table-table)
326 (send-message connection "xdump table *"))
328 (setf phase :meta-type)
329 (send-message connection "xdump meta meta-type"))
331 (setf phase :type-table)
332 (send-message connection "xdump meta-type *"))
334 (setf phase :tables-meta
335 dump-queue (xdump::table-entries (xdump:table "table"))
337 (send-message connection (format nil "xdump meta ~a" (xdump-data:name (aref dump-queue 0)))))
339 (setf phase :tables-content)
340 (send-message connection (format nil "xdump ~a *" (xdump-data:name (aref dump-queue dump-index)))))
342 (if (< dump-index (fill-pointer dump-queue))
343 (progn (setf phase :tables-meta)
345 (loop while (and (< dump-index (fill-pointer dump-queue))
346 (let ((dump-queue-entry (aref dump-queue dump-index)))
347 (or (null dump-queue-entry)
349 (xdump-data:name dump-queue-entry)))))
350 do (incf dump-index))
351 (if (and (<= dump-index (fill-pointer dump-queue))
352 (not (null (aref dump-queue dump-index))))
353 (send-message connection (format nil "xdump meta ~a" (xdump-data:name (aref dump-queue dump-index))))))
354 (set-new-mode (connection-mode connection) 'play-mode))))))))
356 (defmethod special-xup ((c connection))
357 (setf (xdump c) (xdump:make-parser))
358 (send-message c "xdump meta meta" :next-mode 'xdump-mode))
360 (defmethod special-command ((c connection) line)
361 (cond ((string= line "xup") (special-xup c))
362 (t (empire-web:data (session c) "Unknown special command")))
365 (defmethod command ((c connection) line)
366 (cond ((special-command-p line) (special-command c (subseq line 1)))
367 (t (send-message c line))))
369 (defmethod quit ((c connection))
370 (usocket:socket-close (socket c)))