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;; Usage with ii:
;;
;; tail -f \#biz/out | guile -L $BIZ_ROOT -s Biz/Bot.scm
(import (ice-9 rdelim))
(import (ice-9 match))
(import (ice-9 regex))
(import (ice-9 receive))
(import (bs core))
(import (prefix (bs string) string.))
(define (log msg)
(display msg (current-error-port)))
(define (is-command? msg)
(string.prefix? msg "bizbot:"))
(define (parse-line line)
(if (eof-object? line)
(exit)
(let ([matches (regexp-exec
(make-regexp "<(\\S*)>(.*)" regexp/extended)
(string-drop line 11))])
(if matches
`(user
,(match:substring matches 1)
,(string.lstrip (match:substring matches 2) #\space))
`(system ,(string-drop line 11))))))
(define (dispatch user msg)
(let ([msg (-> msg
(string-drop (string-length "bizbot:"))
(string.lstrip #\space))])
(cond
((equal? msg "hi")
(display (fmt "~a: well, hello!" user)))
(else
(display (fmt "command not understood: ~a" msg))))))
(while #t
(match (parse-line (read-line))
[('user user msg)
(if (is-command? msg)
(dispatch user msg)
(begin
(log (fmt "user: ~a " user))
(log (fmt "message: ~a" msg))))]
[('system msg)
(log (fmt "system: ~a" msg))])
(newline)
(force-output))
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