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")))
49 (defun make-connection (&key (user nil)
51 (server-name *default-empire-server*)
52 (server-port *default-empire-server-port*)
56 (make-instance 'connection
59 :server-name server-name
60 :server-port server-port
62 :stream network-stream
66 (defun connect (&key (user nil)
68 (server-name *default-empire-server*)
69 (server-port *default-empire-server-port*)
71 "Connect to server and return a connection object."
72 (let* ((socket (usocket:socket-connect server-name server-port))
73 (stream (usocket:socket-stream socket))
74 (connection (make-connection :user user
77 :network-stream stream
78 :server-name server-name
79 :server-port server-port
81 (handler (spawn-with-name (format nil "empire-handler-~a" user)
82 #'handle-connection connection)))
83 (setf (connection-handler connection) handler)
84 (empire-log:info "empire:connect: ~a" connection)
87 (defgeneric quit (connection))
88 (defgeneric handle-connection (connection))
89 (defgeneric read-message (connection))
90 (defgeneric send-message (connection message))
91 (defgeneric reconnect (conncetion))
93 (defmethod reconnect ((c connection))
94 (with-slots (server-name server-port user password socket stream connection-handler) c
95 (let* ((sock (usocket:socket-connect server-name server-port))
96 (s (usocket:socket-stream sock))
97 (handler (spawn-with-name (format nil "empire-handler-~a" user)
98 #'handle-connection c)))
101 connection-handler handler)))
102 (empire-log:info "~a: reconnect" c))
104 (defparameter +C_CMDOK+ "0")
105 (defparameter +C_DATA+ "1")
106 (defparameter +C_INIT+ "2")
107 (defparameter +C_EXIT+ "3")
108 (defparameter +C_FLUSH+ "4")
109 (defparameter +C_NOECHO+ "5")
110 (defparameter +C_PROMPT+ "6")
111 (defparameter +C_ABORT+ "7")
112 (defparameter +C_REDIR+ "8")
113 (defparameter +C_PIPE+ "9")
114 (defparameter +C_CMDERR+ "a")
115 (defparameter +C_BADCMD+ "b")
116 (defparameter +C_EXECUTE+ "c")
117 (defparameter +C_FLASH+ "d")
118 (defparameter +C_INFORM+ "e")
120 (defclass base-mode ()
121 ((connection :initarg :connection :accessor connection)))
122 (defclass init-mode (base-mode)
123 ((play-sent-p :initform nil
124 :documentation "Have we already sent the play command?")))
125 (defclass play-mode (base-mode) nil)
127 (defun make-mode (connection mode)
128 (make-instance mode :connection connection))
130 (defgeneric set-new-mode (base-mode new-mode))
131 (defmethod set-new-mode ((m base-mode) new-mode)
132 (let* ((c (connection m))
133 (mode (make-mode c new-mode)))
134 (empire-log:info "~a: set-new-mode ~a -> ~a" c (connection-mode c) new-mode)
135 (setf (connection-mode c) mode)))
137 (defgeneric handle-data (base-mode message))
138 (defgeneric handle-init (base-mode message))
139 (defgeneric handle-exit (base-mode message))
140 (defgeneric handle-prompt (base-mode message))
141 (defgeneric handle-flush (base-mode message))
142 (defgeneric handle-simple-message (base-mode message))
144 (defmethod handle-init ((m init-mode) message)
145 (declare (ignorable message))
146 (with-slots (play-sent-p) m
147 (if (not play-sent-p)
149 (play (connection m))
150 (setf play-sent-p t))
151 (set-new-mode m 'play-mode))))
153 (defmethod handle-exit ((m init-mode) message)
154 (declare (ignorable message))
155 (quit (connection m)))
157 (defmethod handle-exit ((m play-mode) message)
158 (declare (ignorable message))
159 (quit (connection m)))
161 (defmethod handle-data ((m play-mode) message)
162 (let* ((c (connection m)))
163 (empire-web:data (session c) message)))
165 (defmethod handle-simple-message ((m play-mode) message)
166 (let* ((c (connection m)))
167 (empire-web:data (session c) message)))
169 (defmethod handle-flush ((m play-mode) message)
170 (let* ((c (connection m)))
171 (empire-web:prompt (session c) message)))
173 (defmethod handle-prompt ((m play-mode) message)
174 (let* ((c (connection m)))
175 (with-input-from-string (s message)
176 (let* ((minutes (read s)) ;;FIXME DANGEROUS
178 (empire-web:prompt (session c)
179 (format nil "[~a,~a]: " minutes btus))))))
181 (defparameter *line-type-dispatch*
182 (list `(,+C_DATA+ . handle-data)
183 `(,+C_INIT+ . handle-init)
184 `(,+C_EXIT+ . handle-exit)
185 `(,+C_FLUSH+ . handle-flush)
186 `(,+C_BADCMD+ . handle-simple-message)
187 `(,+C_FLASH+ . handle-simple-message)
188 `(,+C_PROMPT+ . handle-prompt)))
190 (defun parse-server-line (line)
191 (let* ((first-space-index
192 (loop for i from 0 below (length line)
193 if (eq (char line i) #\Space)
195 (message-type (subseq line 0 first-space-index))
196 (message (if first-space-index
197 (subseq line (+ first-space-index 1))
199 (values message message-type)))
201 (defmethod handle-connection ((c connection))
202 (setf (connection-mode c) (make-mode c 'init-mode))
203 (loop while (read-message c)))
205 (defun lookup-handler (message-type)
206 (cdr (assoc message-type *line-type-dispatch* :test 'string=)))
208 (define-condition no-handler (error)
209 ((mode :initarg :mode)
210 (type :initarg :type))
211 (:report (lambda (condition stream)
212 (with-slots (mode type) condition
213 (format stream "No handler for ~a in mode ~a."
215 (defmethod read-message ((c connection))
217 (let* ((s (network-stream c))
218 (line (read-line s)))
219 (empire-log:info "< ~a~%" line)
220 (multiple-value-bind (message type) (parse-server-line line)
221 (let ((handler (lookup-handler type))
222 (mode (connection-mode c)))
224 (funcall handler mode message)
225 (error 'no-handler :mode mode :type type))))
227 (sb-int:closed-stream-error () nil)
228 (end-of-file () nil)))
230 (defun raw-send-message (s message)
231 (write-sequence message s)
235 (defmethod send-message ((c connection) message)
236 (let ((s (network-stream c)))
237 (empire-log:info "> ~a~%" message)
241 while (and (not sent-p)
245 (raw-send-message s message)
247 (sb-int:closed-stream-error ()
250 (empire-log:info "Connection close - retrying (~a tries left)" tries)
254 (defparameter +special-command-char+ #\;)
256 (defun special-command-p (line)
257 (char= +special-command-char+ (aref line 0)))
259 (defmethod special-xup ((c connection))
262 (defmethod special-command ((c connection) line)
263 (cond ((string= line "xup") (special-xup c))
264 (t (empire-web:data (session c) "Unknown special command")))
267 (defmethod command ((c connection) line)
268 (cond ((special-command-p line) (special-command c (subseq line 1)))
269 (t (send-message c line))))
271 (defgeneric play (connection))
272 (defmethod play ((c connection))
273 (with-slots (user password) c
274 (send-message c (format nil "play FIXME ~a ~a" user password))))
276 (defmethod quit ((c connection))
277 (usocket:socket-close (socket c)))
281 (defvar *l1* "2 Empire server ready")
282 ;; (parse-server-line *l1*)