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)")))
51 (defun make-connection (&key (user nil)
53 (server-name *default-empire-server*)
54 (server-port *default-empire-server-port*)
58 (make-instance 'connection
61 :server-name server-name
62 :server-port server-port
64 :stream network-stream
65 :logging-stream logging-stream))
68 (defun connect (&key (user nil)
70 (server-name *default-empire-server*)
71 (server-port *default-empire-server-port*)
72 (logging-stream *standard-output*))
73 "Connect to server and return a connection object."
74 (let* ((socket (usocket:socket-connect server-name server-port))
75 (stream (usocket:socket-stream socket))
76 (connection (make-connection :user user
79 :network-stream stream
80 :logging-stream logging-stream
81 :server-name server-name
82 :server-port server-port))
83 (handler (spawn-with-name (format nil "empire-handler-~a" user)
84 #'handle-connection connection)))
85 (setf (connection-handler connection) handler)
89 (defgeneric quit (connection))
90 (defgeneric handle-connection (connection))
91 (defgeneric read-message (connection))
92 (defgeneric send-message (connection message))
94 (defparameter +C_CMDOK+ "0")
95 (defparameter +C_DATA+ "1")
96 (defparameter +C_INIT+ "2")
97 (defparameter +C_EXIT+ "3")
98 (defparameter +C_FLUSH+ "4")
99 (defparameter +C_NOECHO+ "5")
100 (defparameter +C_PROMPT+ "6")
101 (defparameter +C_ABORT+ "7")
102 (defparameter +C_REDIR+ "8")
103 (defparameter +C_PIPE+ "9")
104 (defparameter +C_CMDERR+ "a")
105 (defparameter +C_BADCMD+ "b")
106 (defparameter +C_EXECUTE+ "c")
107 (defparameter +C_FLASH+ "d")
108 (defparameter +C_INFORM+ "e")
110 (defclass base-mode ()
111 ((connection :initarg :connection :accessor connection)))
112 (defclass init-mode (base-mode)
113 ((play-sent-p :initform nil
114 :documentation "Have we already sent the play command?")))
115 (defclass play-mode (base-mode) nil)
117 (defun make-mode (connection mode)
118 (make-instance mode :connection connection))
120 (defgeneric set-new-mode (base-mode new-mode))
121 (defmethod set-new-mode ((m base-mode) new-mode)
122 (let* ((c (connection m))
123 (mode (make-mode c new-mode)))
124 (setf (connection-mode c) mode)))
126 (defgeneric handle-data (base-mode message))
127 (defgeneric handle-init (base-mode message))
128 (defgeneric handle-prompt (base-mode message))
130 (defmethod handle-init ((m init-mode) message)
131 (declare (ignorable message))
132 (with-slots (play-sent-p) m
133 (if (not play-sent-p)
135 (play (connection m))
136 (setf play-sent-p t))
137 (set-new-mode m 'play-mode))))
139 (defmethod handle-data ((m play-mode) message)
140 (let* ((c (connection m))
141 (log (logging-stream c)))
142 (format log "handle-data ~a~%" message)))
144 (defmethod handle-prompt ((m play-mode) message)
145 (let* ((c (connection m))
146 (log (logging-stream c)))
147 (with-input-from-string (s message)
148 (let* ((minutes (read s))
150 (format log "[~a:~a]: ~%" minutes btus)))))
152 (defparameter *line-type-dispatch*
153 (list `(,+C_DATA+ . handle-data)
154 `(,+C_INIT+ . handle-init)
155 `(,+C_PROMPT+ . handle-prompt)))
157 (defun parse-server-line (line)
158 (let* ((first-space-index
159 (loop for i from 0 below (length line)
160 if (eq (char line i) #\Space)
162 (message-type (subseq line 0 first-space-index))
163 (message (subseq line (+ first-space-index 1))))
164 (values message message-type)))
166 (defmethod handle-connection ((c connection))
167 (setf (connection-mode c) (make-mode c 'init-mode))
168 (loop while (read-message c)))
170 (defun lookup-handler (message-type)
171 (cdr (assoc message-type *line-type-dispatch* :test 'string=)))
173 (define-condition no-handler (error)
174 ((mode :initarg :mode)
175 (type :initarg :type))
176 (:report (lambda (condition stream)
177 (with-slots (mode type) condition
178 (format stream "No handler for ~a in mode ~a."
180 (defmethod read-message ((c connection))
181 (let* ((s (network-stream c))
182 (log (logging-stream c))
183 (line (read-line s)))
184 (format log "< ~a~%" line)
185 (multiple-value-bind (message type) (parse-server-line line)
186 (let ((handler (lookup-handler type))
187 (mode (connection-mode c)))
189 (funcall handler mode message)
190 (error 'no-handler :mode mode :type type))))
193 (defmethod send-message ((c connection) message)
194 (let ((s (network-stream c))
195 (log (logging-stream c)))
196 (format log "< ~a~%" message)
197 (write-sequence message s)
202 (defgeneric play (connection))
203 (defmethod play ((c connection))
204 (with-slots (user password) c
205 (send-message c (format nil "play FIXME ~a ~a" user password))))
207 (defmethod quit ((c connection))
208 (usocket:socket-close (socket c)))
212 (defvar *l1* "2 Empire server ready")
213 ;; (parse-server-line *l1*)