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 :initarg :logging-stream
38 :accessor logging-stream
40 :documentation "Messages coming back from the server is sent to
43 :accessor connection-handler
45 :documentation "Handler function for incoming messages")
47 :accessor connection-mode
49 :documentation "TODO(gefla)")
53 :documentation "web session to which this connection belongs")))
55 (defun make-connection (&key (user nil)
57 (server-name *default-empire-server*)
58 (server-port *default-empire-server-port*)
63 (make-instance 'connection
66 :server-name server-name
67 :server-port server-port
69 :stream network-stream
70 :logging-stream logging-stream
74 (defun connect (&key (user nil)
76 (server-name *default-empire-server*)
77 (server-port *default-empire-server-port*)
78 (logging-stream *standard-output*)
80 "Connect to server and return a connection object."
81 (let* ((socket (usocket:socket-connect server-name server-port))
82 (stream (usocket:socket-stream socket))
83 (connection (make-connection :user user
86 :network-stream stream
87 :logging-stream logging-stream
88 :server-name server-name
89 :server-port server-port
91 (handler (spawn-with-name (format nil "empire-handler-~a" user)
92 #'handle-connection connection)))
93 (setf (connection-handler connection) handler)
96 (defgeneric quit (connection))
97 (defgeneric handle-connection (connection))
98 (defgeneric read-message (connection))
99 (defgeneric send-message (connection message))
100 (defgeneric reconnect (conncetion))
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))
106 (handler (spawn-with-name (format nil "empire-handler-~a" user)
107 #'handle-connection c)))
110 connection-handler handler))))
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 ((play-sent-p :initform nil
132 :documentation "Have we already sent the play command?")))
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 (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-simple-message (base-mode message))
150 (defmethod handle-init ((m init-mode) message)
151 (declare (ignorable message))
152 (with-slots (play-sent-p) m
153 (if (not play-sent-p)
155 (play (connection m))
156 (setf play-sent-p t))
157 (set-new-mode m 'play-mode))))
159 (defmethod handle-exit ((m init-mode) message)
160 (declare (ignorable message))
161 (quit (connection m)))
163 (defmethod handle-exit ((m play-mode) message)
164 (declare (ignorable message))
165 (quit (connection m)))
167 (defmethod handle-data ((m play-mode) message)
168 (let* ((c (connection m))
169 (log (logging-stream c)))
170 (format log "handle-data ~a~%" message)
171 (empire-web:data (session c) message)))
173 (defmethod handle-simple-message ((m play-mode) message)
174 (let* ((c (connection m))
175 (log (logging-stream c)))
176 (format log "handle-simple-message ~a~%" message)
177 (empire-web:data (session c) message)))
179 (defmethod handle-prompt ((m play-mode) message)
180 (let* ((c (connection m))
181 (log (logging-stream c)))
182 (with-input-from-string (s message)
183 (let* ((minutes (read s)) ;;FIXME DANGEROUS
185 (format log "[~a:~a]: ~%" minutes btus)
186 (empire-web:prompt (session c) minutes btus)))))
188 (defparameter *line-type-dispatch*
189 (list `(,+C_DATA+ . handle-data)
190 `(,+C_INIT+ . handle-init)
191 `(,+C_EXIT+ . handle-exit)
192 `(,+C_FLUSH+ . handle-simple-message)
193 `(,+C_BADCMD+ . handle-simple-message)
194 `(,+C_FLASH+ . handle-simple-message)
195 `(,+C_PROMPT+ . handle-prompt)))
197 (defun parse-server-line (line)
198 (let* ((first-space-index
199 (loop for i from 0 below (length line)
200 if (eq (char line i) #\Space)
202 (message-type (subseq line 0 first-space-index))
203 (message (if first-space-index
204 (subseq line (+ first-space-index 1))
206 (values message message-type)))
208 (defmethod handle-connection ((c connection))
209 (setf (connection-mode c) (make-mode c 'init-mode))
210 (loop while (read-message c)))
212 (defun lookup-handler (message-type)
213 (cdr (assoc message-type *line-type-dispatch* :test 'string=)))
215 (define-condition no-handler (error)
216 ((mode :initarg :mode)
217 (type :initarg :type))
218 (:report (lambda (condition stream)
219 (with-slots (mode type) condition
220 (format stream "No handler for ~a in mode ~a."
222 (defmethod read-message ((c connection))
224 (let* ((s (network-stream c))
225 (log (logging-stream c))
226 (line (read-line s)))
227 (format log "< ~a~%" line)
228 (multiple-value-bind (message type) (parse-server-line line)
229 (let ((handler (lookup-handler type))
230 (mode (connection-mode c)))
232 (funcall handler mode message)
233 (error 'no-handler :mode mode :type type))))
235 (sb-int:closed-stream-error () nil)
236 (end-of-file () nil)))
238 (defun raw-send-message (s message)
239 (write-sequence message s)
243 (defmethod send-message ((c connection) message)
244 (let ((s (network-stream c))
245 (log (logging-stream c)))
246 (format log "< ~a~%" message)
250 while (and (not sent-p)
254 (raw-send-message s message)
256 (sb-int:closed-stream-error ()
262 (defgeneric play (connection))
263 (defmethod play ((c connection))
264 (with-slots (user password) c
265 (send-message c (format nil "play FIXME ~a ~a" user password))))
267 (defmethod quit ((c connection))
268 (usocket:socket-close (socket c)))
272 (defvar *l1* "2 Empire server ready")
273 ;; (parse-server-line *l1*)