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 ((phase :initform :initial
131 :documentation "Initialization phase")))
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-cmdok (base-mode message))
145 (defgeneric handle-data (base-mode message))
146 (defgeneric handle-init (base-mode message))
147 (defgeneric handle-exit (base-mode message))
148 (defgeneric handle-prompt (base-mode message))
149 (defgeneric handle-flush (base-mode message))
150 (defgeneric handle-simple-message (base-mode message))
151 (defgeneric handle-ignore (base-mode message))
153 (defmethod handle-init ((m init-mode) message)
154 (declare (ignorable message))
155 (with-slots (phase connection) m
157 (:initial (handle-cmdok m message))
158 (:play-sent (set-new-mode m 'play-mode)))))
160 (defmethod handle-cmdok ((m init-mode) message)
161 (declare (ignorable message))
162 (with-slots (phase connection) m
163 (flet ((init-phase (mode send-args next-phase)
164 (with-slots (phase connection) mode
165 (send-message-one connection (apply #'format nil send-args))
166 (setf phase next-phase))))
167 (with-slots (user password) (connection m)
169 (:initial (init-phase m `("client eow ~a" ,*version*) :client-sent))
170 (:client-sent (init-phase m `("coun ~a" ,user) :coun-sent))
171 (:coun-sent (init-phase m `("pass ~a" ,password) :pass-sent))
172 (:pass-sent (init-phase m '("play") :play-sent)))))))
174 (defmethod handle-exit ((m init-mode) message)
175 (declare (ignorable message))
176 (with-slots (phase connection) m
178 (:play-sent (send-message-one connection "kill")
179 (setf phase :kill-sent))
180 (:kill-sent (send-message-one connection "play")
181 (setf phase :play-sent)))))
183 (defmethod handle-data ((m init-mode) message)
184 (declare (ignorable message))
187 (defmethod handle-exit ((m play-mode) message)
188 (declare (ignorable message))
189 (quit (connection m)))
191 (defmethod handle-data ((m play-mode) message)
192 (let* ((c (connection m)))
193 (empire-web:data (session c) message)))
195 (defmethod handle-simple-message ((m play-mode) message)
196 (let* ((c (connection m)))
197 (empire-web:data (session c) message)))
199 (defmethod handle-flush ((m play-mode) message)
200 (let* ((c (connection m)))
201 (empire-web:prompt (session c) message)
204 (defmethod send-next-line ((c connection))
205 (let ((next-event (locked-queue:dequeue (send-queue c))))
206 (etypecase next-event
207 (string (send-message-one c next-event))
208 (cons (let ((message (car next-event))
209 (mode (cdr next-event)))
210 (send-message-one c message)
211 (set-new-mode (connection-mode c) mode))))))
213 (defun read-no-eval (stream)
214 (let ((*read-eval* nil))
217 (defmethod handle-prompt ((m play-mode) message)
218 (let* ((c (connection m)))
219 (with-input-from-string (s message)
220 (let* ((minutes (read-no-eval s))
221 (btus (read-no-eval s)))
222 (empire-web:prompt (session c)
223 (format nil "[~a,~a]: " minutes btus))))
226 (defmethod handle-ignore ((m init-mode) message)
227 (declare (ignorable message))
230 (defparameter *line-type-dispatch*
231 (list `(,+C_DATA+ . handle-data)
232 `(,+C_INIT+ . handle-init)
233 `(,+C_EXIT+ . handle-exit)
234 `(,+C_FLUSH+ . handle-flush)
235 `(,+C_BADCMD+ . handle-simple-message)
236 `(,+C_FLASH+ . handle-simple-message)
237 `(,+C_CMDOK+ . handle-cmdok)
238 `(,+C_PROMPT+ . handle-prompt)))
240 (defun parse-server-line (line)
241 (let* ((first-space-index
242 (loop for i from 0 below (length line)
243 if (eq (char line i) #\Space)
245 (message-type (subseq line 0 first-space-index))
246 (message (if first-space-index
247 (subseq line (+ first-space-index 1))
249 (values message message-type)))
251 (defmethod handle-connection ((c connection))
252 (setf (connection-mode c) (make-mode c 'init-mode))
253 (loop while (read-message c)))
255 (defun lookup-handler (message-type)
256 (cdr (assoc message-type *line-type-dispatch* :test 'string=)))
258 (define-condition no-handler (error)
259 ((mode :initarg :mode)
260 (type :initarg :type))
261 (:report (lambda (condition stream)
262 (with-slots (mode type) condition
263 (format stream "No handler for ~a in mode ~a."
265 (defmethod read-message ((c connection))
267 (let* ((s (network-stream c))
268 (line (read-line s)))
269 (empire-log:info "~a: < ~a" c line)
270 (multiple-value-bind (message type) (parse-server-line line)
271 (let ((handler (lookup-handler type))
272 (mode (connection-mode c)))
274 (funcall handler mode message)
275 (error 'no-handler :mode mode :type type))))
277 (sb-int:closed-stream-error () nil)
278 (sb-int:simple-stream-error () nil)
279 (end-of-file () nil)))
281 (defun raw-send-message (s message)
282 (write-sequence message s)
286 (defgeneric send-message-one (connection string))
287 (defmethod send-message-one ((c connection) message)
288 (empire-log:info "~a: > ~a" c message)
289 (let ((s (network-stream c)))
290 (raw-send-message s message)))
292 (defmethod send-message ((c connection) message &key next-mode)
293 (if (not (connected-p c))
296 (locked-queue:enqueue (send-queue c) (cons message next-mode))
297 (locked-queue:enqueue (send-queue c) message)))
299 (defparameter +special-command-char+ #\;)
301 (defun special-command-p (line)
302 (and (> (length line) 0)
303 (char= +special-command-char+ (aref line 0))))
305 (defclass xdump-mode (play-mode)
306 ((parser :initform (xdump:make-parser))
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 parser phase dump-queue dump-index) m
313 (if (xdump:parse-line parser message)
314 ;;XXX consider something like a 'pop-mode function
317 (setf phase :meta-table
318 parser (xdump:make-parser))
319 (send-message connection "xdump meta table"))
321 (setf phase :table-table
322 parser (xdump:make-parser))
323 (send-message connection "xdump table *"))
325 (setf phase :tables-meta
326 dump-queue (xdump::table-entries (xdump::get-table "table"))
328 parser (xdump:make-parser))
329 (send-message connection (format nil "xdump meta ~a" (xdump-data::table-name (aref dump-queue 0)))))
331 (setf phase :tables-content
332 parser (xdump:make-parser))
333 (send-message connection (format nil "xdump ~a *" (xdump-data::table-name (aref dump-queue dump-index)))))
335 (if (< dump-index (fill-pointer dump-queue))
336 (progn (setf phase :tables-meta
337 parser (xdump:make-parser))
339 (loop while (and (< dump-index (fill-pointer dump-queue))
340 (let ((dump-queue-entry (aref dump-queue dump-index)))
341 (or (null dump-queue-entry)
342 (string= "meta" (xdump-data::table-name dump-queue-entry)))))
343 do (incf dump-index))
344 (if (and (<= dump-index (fill-pointer dump-queue))
345 (not (null (aref dump-queue dump-index))))
346 (send-message connection (format nil "xdump meta ~a" (xdump-data::table-name (aref dump-queue dump-index))))))
347 (set-new-mode (connection-mode connection) 'play-mode)))))))
349 (defmethod special-xup ((c connection))
350 (send-message c "xdump meta meta" :next-mode 'xdump-mode))
352 (defmethod special-command ((c connection) line)
353 (cond ((string= line "xup") (special-xup c))
354 (t (empire-web:data (session c) "Unknown special command")))
357 (defmethod command ((c connection) line)
358 (cond ((special-command-p line) (special-command c (subseq line 1)))
359 (t (send-message c line))))
361 (defmethod quit ((c connection))
362 (usocket:socket-close (socket c)))