#+BEGIN_SRC scheme
(define-class <my-irc-bot> (<irc-bot>))
- (define-method (handle-line (irc-bot <my-irc-bot>) speaker channel
- line emote?)
+ (define-method (handle-line (irc-bot <my-irc-bot>) message
+ speaker channel line emote?)
(if emote?
(format #t "~a emoted ~s in channel ~a\n"
speaker line channel)
(8sync uses GOOPS to define actors.)
We extended the handle-line generic method, so this is the code that
will be called whenever the IRC bot "hears" anything.
+This method is itself an action handler, hence the second argument
+for =message=, which we can ignore for now.
+Pleasantly, the message's argument body is passed in as the rest of
+the arguments.
+
For now the code is pretty basic: it just outputs whatever it "hears"
from a user in a channel to the current output port.
Pretty boring!
Change handle-line to this:
#+BEGIN_SRC scheme
- (define-method (handle-line (irc-bot <my-irc-bot>) speaker channel
- line emote?)
+ (define-method (handle-line (irc-bot <my-irc-bot>) message
+ speaker channel line emote?)
(<- (actor-id irc-bot) 'send-line channel
(format #f "Bawwwwk! ~a says: ~a" speaker line)))
#+END_SRC
like so:
#+BEGIN_SRC scheme
- (define-method (handle-line (irc-bot <my-irc-bot>) speaker channel
- line emote?)
+ (define-method (handle-line (irc-bot <my-irc-bot>) message
+ speaker channel line emote?)
(irc-bot-send-line irc-bot channel
(format #f "Bawwwwk! ~a says: ~a" speaker line)))
#+END_SRC
To implement it, we're going to pull out Guile's pattern matcher.
#+BEGIN_SRC scheme
- (define-method (handle-line (irc-bot <my-irc-bot>) speaker channel
- line emote?)
+ (define-method (handle-line (irc-bot <my-irc-bot>) message
+ speaker channel line emote?)
(define my-name (irc-bot-username irc-bot))
(define (looks-like-me? str)
(or (equal? str my-name)
you're right:
#+BEGIN_SRC scheme
- (define-method (handle-line (irc-bot <my-irc-bot>) speaker channel
- line emote?)
+ (define-method (handle-line (irc-bot <my-irc-bot>) message
+ speaker channel line emote?)
(define my-name (irc-bot-username irc-bot))
(define (looks-like-me? str)
(or (equal? str my-name)
things to:
#+BEGIN_SRC scheme
- (define-method (handle-line (irc-bot <my-irc-bot>) speaker channel
- line emote?)
+ (define-method (handle-line (irc-bot <my-irc-bot>) message
+ speaker channel line emote?)
;; [... snip ...]
(define (respond respond-line)
(<- (actor-id irc-bot) 'send-line (pk 'channel channel)
(We can remove the pk now that we know what's going on.)
#+BEGIN_SRC scheme
- (define-method (handle-line (irc-bot <my-irc-bot>) speaker channel
- line emote?)
+ (define-method (handle-line (irc-bot <my-irc-bot>) message
+ speaker channel line emote?)
;; [... snip ...]
(define (respond respond-line)
(<- (actor-id irc-bot) 'send-line