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)
97 (defgeneric quit (connection))
98 (defgeneric handle-connection (connection))
99 (defgeneric read-message (connection))
100 (defgeneric send-message (connection message))
102 (defparameter +C_CMDOK+ "0")
103 (defparameter +C_DATA+ "1")
104 (defparameter +C_INIT+ "2")
105 (defparameter +C_EXIT+ "3")
106 (defparameter +C_FLUSH+ "4")
107 (defparameter +C_NOECHO+ "5")
108 (defparameter +C_PROMPT+ "6")
109 (defparameter +C_ABORT+ "7")
110 (defparameter +C_REDIR+ "8")
111 (defparameter +C_PIPE+ "9")
112 (defparameter +C_CMDERR+ "a")
113 (defparameter +C_BADCMD+ "b")
114 (defparameter +C_EXECUTE+ "c")
115 (defparameter +C_FLASH+ "d")
116 (defparameter +C_INFORM+ "e")
118 (defclass base-mode ()
119 ((connection :initarg :connection :accessor connection)))
120 (defclass init-mode (base-mode)
121 ((play-sent-p :initform nil
122 :documentation "Have we already sent the play command?")))
123 (defclass play-mode (base-mode) nil)
125 (defun make-mode (connection mode)
126 (make-instance mode :connection connection))
128 (defgeneric set-new-mode (base-mode new-mode))
129 (defmethod set-new-mode ((m base-mode) new-mode)
130 (let* ((c (connection m))
131 (mode (make-mode c new-mode)))
132 (setf (connection-mode c) mode)))
134 (defgeneric handle-data (base-mode message))
135 (defgeneric handle-init (base-mode message))
136 (defgeneric handle-exit (base-mode message))
137 (defgeneric handle-prompt (base-mode message))
139 (defmethod handle-init ((m init-mode) message)
140 (declare (ignorable message))
141 (with-slots (play-sent-p) m
142 (if (not play-sent-p)
144 (play (connection m))
145 (setf play-sent-p t))
146 (set-new-mode m 'play-mode))))
148 (defmethod handle-exit ((m init-mode) message)
149 (declare (ignorable message))
150 (quit (connection m)))
152 (defmethod handle-exit ((m play-mode) message)
153 (declare (ignorable message))
154 (quit (connection m)))
156 (defmethod handle-data ((m play-mode) message)
157 (let* ((c (connection m))
158 (log (logging-stream c)))
159 (format log "handle-data ~a~%" message)
160 (empire-web:data (session c) message)))
162 (defmethod handle-flush ((m play-mode) message)
163 (let* ((c (connection m))
164 (log (logging-stream c)))
165 (format log "handle-flush ~a~%" message)
166 (empire-web:data (session c) message)))
168 (defmethod handle-prompt ((m play-mode) message)
169 (let* ((c (connection m))
170 (log (logging-stream c)))
171 (with-input-from-string (s message)
172 (let* ((minutes (read s)) ;;FIXME DANGEROUS
174 (format log "[~a:~a]: ~%" minutes btus)
175 (empire-web:prompt (session c) minutes btus)))))
177 (defparameter *line-type-dispatch*
178 (list `(,+C_DATA+ . handle-data)
179 `(,+C_INIT+ . handle-init)
180 `(,+C_EXIT+ . handle-exit)
181 `(,+C_PROMPT+ . handle-prompt)))
183 (defun parse-server-line (line)
184 (let* ((first-space-index
185 (loop for i from 0 below (length line)
186 if (eq (char line i) #\Space)
188 (message-type (subseq line 0 first-space-index))
189 (message (subseq line (+ first-space-index 1))))
190 (values message message-type)))
192 (defmethod handle-connection ((c connection))
193 (setf (connection-mode c) (make-mode c 'init-mode))
194 (loop while (read-message c)))
196 (defun lookup-handler (message-type)
197 (cdr (assoc message-type *line-type-dispatch* :test 'string=)))
199 (define-condition no-handler (error)
200 ((mode :initarg :mode)
201 (type :initarg :type))
202 (:report (lambda (condition stream)
203 (with-slots (mode type) condition
204 (format stream "No handler for ~a in mode ~a."
206 (defmethod read-message ((c connection))
208 (let* ((s (network-stream c))
209 (log (logging-stream c))
210 (line (read-line s)))
211 (format log "< ~a~%" line)
212 (multiple-value-bind (message type) (parse-server-line line)
213 (let ((handler (lookup-handler type))
214 (mode (connection-mode c)))
216 (funcall handler mode message)
217 (error 'no-handler :mode mode :type type))))
219 (sb-int:closed-stream-error () nil)))
221 (defmethod send-message ((c connection) message)
222 (let ((s (network-stream c))
223 (log (logging-stream c)))
224 (format log "< ~a~%" message)
225 (write-sequence message s)
230 (defgeneric play (connection))
231 (defmethod play ((c connection))
232 (with-slots (user password) c
233 (send-message c (format nil "play FIXME ~a ~a" user password))))
235 (defmethod quit ((c connection))
236 (usocket:socket-close (socket c)))
240 (defvar *l1* "2 Empire server ready")
241 ;; (parse-server-line *l1*)