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")
52 (xdump :accessor xdump :initform (xdump:make-parser))))
54 (defun make-connection (&key (user nil)
56 (server-name *default-empire-server*)
57 (server-port *default-empire-server-port*)
61 (make-instance 'connection
64 :server-name server-name
65 :server-port server-port
67 :stream network-stream
71 (defun connect (&key (user nil)
73 (server-name *default-empire-server*)
74 (server-port *default-empire-server-port*)
76 "Connect to server and return a connection object."
77 (let* ((socket (usocket:socket-connect server-name server-port))
78 (stream (usocket:socket-stream socket))
79 (connection (make-connection :user user
82 :network-stream stream
83 :server-name server-name
84 :server-port server-port
86 (handler (spawn-with-name (format nil "empire-handler-~a" user)
87 #'handle-connection connection)))
88 (setf (connection-handler connection) handler)
89 (empire-log:info "~a: connect" connection)
92 (defgeneric quit (connection))
93 (defgeneric handle-connection (connection))
94 (defgeneric read-message (connection))
95 (defgeneric send-message (connection message &key next-mode))
96 (defgeneric connected-p (connection))
97 (defgeneric reconnect (conncetion))
99 (defmethod connected-p ((c connection))
100 (sb-thread:thread-alive-p (connection-handler c)))
102 (defmethod reconnect ((c connection))
103 (with-slots (server-name server-port user password socket stream connection-handler) c
104 (let* ((sock (usocket:socket-connect server-name server-port))
105 (s (usocket:socket-stream sock)))
108 connection-handler (spawn-with-name (format nil "empire-handler-~a" user)
109 #'handle-connection c))))
110 (empire-log:info "~a: reconnect" c))
112 (defparameter +C_CMDOK+ "0")
113 (defparameter +C_DATA+ "1")
114 (defparameter +C_INIT+ "2")
115 (defparameter +C_EXIT+ "3")
116 (defparameter +C_FLUSH+ "4")
117 (defparameter +C_NOECHO+ "5")
118 (defparameter +C_PROMPT+ "6")
119 (defparameter +C_ABORT+ "7")
120 (defparameter +C_REDIR+ "8")
121 (defparameter +C_PIPE+ "9")
122 (defparameter +C_CMDERR+ "a")
123 (defparameter +C_BADCMD+ "b")
124 (defparameter +C_EXECUTE+ "c")
125 (defparameter +C_FLASH+ "d")
126 (defparameter +C_INFORM+ "e")
128 (defclass base-mode ()
129 ((connection :initarg :connection :accessor connection)))
130 (defclass init-mode (base-mode)
131 ((phase :initform :initial
132 :documentation "Initialization phase")))
133 (defclass play-mode (base-mode) nil)
135 (defun make-mode (connection mode)
136 (make-instance mode :connection connection))
138 (defgeneric set-new-mode (base-mode new-mode))
139 (defmethod set-new-mode ((m base-mode) new-mode)
140 (let* ((c (connection m))
141 (mode (make-mode c new-mode)))
142 (empire-log:info "~a: set-new-mode ~a -> ~a" c (connection-mode c) new-mode)
143 (setf (connection-mode c) mode)))
145 (defgeneric handle-cmdok (base-mode message))
146 (defgeneric handle-data (base-mode message))
147 (defgeneric handle-init (base-mode message))
148 (defgeneric handle-exit (base-mode message))
149 (defgeneric handle-prompt (base-mode message))
150 (defgeneric handle-flush (base-mode message))
151 (defgeneric handle-simple-message (base-mode message))
152 (defgeneric handle-ignore (base-mode message))
154 (defmethod handle-init ((m init-mode) message)
155 (declare (ignorable message))
156 (with-slots (phase connection) m
158 (:initial (handle-cmdok m message))
159 (:play-sent (set-new-mode m 'play-mode)))))
161 (defmethod handle-cmdok ((m init-mode) message)
162 (declare (ignorable message))
163 (with-slots (phase connection) m
164 (flet ((init-phase (mode send-args next-phase)
165 (with-slots (phase connection) mode
166 (send-message-one connection (apply #'format nil send-args))
167 (setf phase next-phase))))
168 (with-slots (user password) (connection m)
170 (:initial (init-phase m `("client eow ~a" ,*version*) :client-sent))
171 (:client-sent (init-phase m `("coun ~a" ,user) :coun-sent))
172 (:coun-sent (init-phase m `("pass ~a" ,password) :pass-sent))
173 (:pass-sent (init-phase m '("play") :play-sent)))))))
175 (defmethod handle-exit ((m init-mode) message)
176 (declare (ignorable message))
177 (with-slots (phase connection) m
179 (:play-sent (send-message-one connection "kill")
180 (setf phase :kill-sent))
181 (:kill-sent (send-message-one connection "play")
182 (setf phase :play-sent)))))
184 (defmethod handle-data ((m init-mode) message)
185 (declare (ignorable message))
188 (defmethod handle-exit ((m play-mode) message)
189 (declare (ignorable message))
190 (quit (connection m)))
192 (defmethod handle-data ((m play-mode) message)
193 (let* ((c (connection m)))
194 (empire-web:data (session c) message)))
196 (defmethod handle-simple-message ((m play-mode) message)
197 (let* ((c (connection m)))
198 (empire-web:data (session c) message)))
200 (defmethod handle-flush ((m play-mode) message)
201 (let* ((c (connection m)))
202 (empire-web:prompt (session c) message)
205 (defmethod send-next-line ((c connection))
206 (let ((next-event (locked-queue:dequeue (send-queue c))))
207 (etypecase next-event
208 (string (send-message-one c next-event))
209 (cons (let ((message (car next-event))
210 (mode (cdr next-event)))
211 (send-message-one c message)
212 (set-new-mode (connection-mode c) mode))))))
214 (defun read-no-eval (stream)
215 (let ((*read-eval* nil))
218 (defmethod handle-prompt ((m play-mode) message)
219 (let* ((c (connection m)))
220 (with-input-from-string (s message)
221 (let* ((minutes (read-no-eval s))
222 (btus (read-no-eval s)))
223 (empire-web:prompt (session c)
224 (format nil "[~a,~a]: " minutes btus))))
227 (defmethod handle-ignore ((m init-mode) message)
228 (declare (ignorable message))
231 (defparameter *line-type-dispatch*
232 (list `(,+C_DATA+ . handle-data)
233 `(,+C_INIT+ . handle-init)
234 `(,+C_EXIT+ . handle-exit)
235 `(,+C_FLUSH+ . handle-flush)
236 `(,+C_BADCMD+ . handle-simple-message)
237 `(,+C_FLASH+ . handle-simple-message)
238 `(,+C_CMDOK+ . handle-cmdok)
239 `(,+C_PROMPT+ . handle-prompt)))
241 (defun parse-server-line (line)
242 (let* ((first-space-index
243 (loop for i from 0 below (length line)
244 if (eq (char line i) #\Space)
246 (message-type (subseq line 0 first-space-index))
247 (message (if first-space-index
248 (subseq line (+ first-space-index 1))
250 (values message message-type)))
252 (defmethod handle-connection ((c connection))
253 (setf (connection-mode c) (make-mode c 'init-mode))
254 (loop while (read-message c)))
256 (defun lookup-handler (message-type)
257 (cdr (assoc message-type *line-type-dispatch* :test 'string=)))
259 (define-condition no-handler (error)
260 ((mode :initarg :mode)
261 (type :initarg :type))
262 (:report (lambda (condition stream)
263 (with-slots (mode type) condition
264 (format stream "No handler for ~a in mode ~a."
266 (defmethod read-message ((c connection))
268 (let* ((s (network-stream c))
269 (line (read-line s)))
270 (empire-log:info "~a: < ~a" c line)
271 (multiple-value-bind (message type) (parse-server-line line)
272 (let ((handler (lookup-handler type))
273 (mode (connection-mode c)))
275 (funcall handler mode message)
276 (error 'no-handler :mode mode :type type))))
278 (sb-int:closed-stream-error () nil)
279 (sb-int:simple-stream-error () nil)
280 (end-of-file () nil)))
282 (defun raw-send-message (s message)
283 (write-sequence message s)
287 (defgeneric send-message-one (connection string))
288 (defmethod send-message-one ((c connection) message)
289 (empire-log:info "~a: > ~a" c message)
290 (let ((s (network-stream c)))
291 (raw-send-message s message)))
293 (defmethod send-message ((c connection) message &key next-mode)
294 (if (not (connected-p c))
297 (locked-queue:enqueue (send-queue c) (cons message next-mode))
298 (locked-queue:enqueue (send-queue c) message)))
300 (defparameter +special-command-char+ #\;)
302 (defun special-command-p (line)
303 (and (> (length line) 0)
304 (char= +special-command-char+ (aref line 0))))
306 (defclass xdump-mode (play-mode)
307 ((phase :initform :meta-meta)
308 (dump-queue :initform nil)
309 (dump-index :initform 0)))
311 (defmethod handle-data ((m xdump-mode) message)
312 (with-slots (connection phase dump-queue dump-index) m
313 (if (xdump:parse-line (xdump connection) message)
314 ;;XXX consider something like a 'pop-mode function
317 (setf phase :meta-table)
318 (send-message connection "xdump meta table"))
320 (setf phase :table-table)
321 (send-message connection "xdump table *"))
323 (setf phase :tables-meta
324 dump-queue (xdump::table-entries (xdump::get-table "table"))
326 (send-message connection (format nil "xdump meta ~a" (xdump-data::table-name (aref dump-queue 0)))))
328 (setf phase :tables-content)
329 (send-message connection (format nil "xdump ~a *" (xdump-data::table-name (aref dump-queue dump-index)))))
331 (if (< dump-index (fill-pointer dump-queue))
332 (progn (setf phase :tables-meta)
334 (loop while (and (< dump-index (fill-pointer dump-queue))
335 (let ((dump-queue-entry (aref dump-queue dump-index)))
336 (or (null dump-queue-entry)
337 (string= "meta" (xdump-data::table-name dump-queue-entry)))))
338 do (incf dump-index))
339 (if (and (<= dump-index (fill-pointer dump-queue))
340 (not (null (aref dump-queue dump-index))))
341 (send-message connection (format nil "xdump meta ~a" (xdump-data::table-name (aref dump-queue dump-index))))))
342 (set-new-mode (connection-mode connection) 'play-mode)))))))
344 (defmethod special-xup ((c connection))
345 (send-message c "xdump meta meta" :next-mode 'xdump-mode))
347 (defmethod special-command ((c connection) line)
348 (cond ((string= line "xup") (special-xup c))
349 (t (empire-web:data (session c) "Unknown special command")))
352 (defmethod command ((c connection) line)
353 (cond ((special-command-p line) (special-command c (subseq line 1)))
354 (t (send-message c line))))
356 (defmethod quit ((c connection))
357 (usocket:socket-close (socket c)))