From 550ab3afe1fb685b4882239e89625b89227a4d2a Mon Sep 17 00:00:00 2001
From: plugd <plugd@thelambdalab.xyz>
Date: Sun, 3 Sep 2023 15:09:23 +0200
Subject: [PATCH] Exception handling.

---
 botbot.scm | 33 +++++++++++++++++++++++++--------
 1 file changed, 25 insertions(+), 8 deletions(-)

diff --git a/botbot.scm b/botbot.scm
index 456d3a7..187f0cb 100644
--- a/botbot.scm
+++ b/botbot.scm
@@ -21,6 +21,7 @@
         (chicken string)
         (chicken pathname)
         (chicken process-context)
+        (chicken condition)
         (chicken irregex)
         matchable srfi-13 srfi-1 srfi-18
         tcp6 openssl)
@@ -45,7 +46,6 @@
 
 (define (launch-bot)
   ;; (let-values (((in-port out-port) (tcp-connect host port)))
-  (load-bot)
   (let-values (((in-port out-port)
                 (if usetls
                     (ssl-connect* hostname: irc-host port: (or irc-port 6697))
@@ -75,8 +75,18 @@
        (loop)))))
 
 (define (load-bot)
-  (set! bot-proc (eval (with-input-from-file bot-proc-file read)))
-  (print "Loaded bot procedure file."))
+  (let ((new-bot-proc
+         (condition-case
+             (eval (with-input-from-file bot-proc-file read))
+           (o (exn)
+              (print-error-message o)
+              #f))))
+    (if new-bot-proc
+        (begin
+          (set! bot-proc new-bot-proc)
+          (print "Loaded bot procedure file."))
+        (print "Error loading procedure file."))
+    new-bot-proc))
 
 (define (bot-loop in-port out-port)
   (let ((privmsg (lambda (to . args)
@@ -93,15 +103,20 @@
         ((source "PRIVMSG" target "bbreload")
          (when (and allow-reload (string=? target bot-nick))
            (print "Reveived reload command from " source)
-           (load-bot)
-           (privmsg source "Reloaded bot script.")))
+           (if (load-bot)
+               (privmsg source "Reloaded bot script.")
+               (privmsg source "Error loading bot script."))))
         ((source "PRIVMSG" target args ...)
          (when (string=? target bot-nick)
            (when (>= verbosity-level 1)
              (display "Received msg: ")
              (write msg)
              (newline))
-           (bot-proc source args privmsg)))
+           (condition-case
+               (bot-proc source args privmsg)
+             (o (exn)
+                (print "Error executing bot script.")
+                (print-error-message o)))))
         (_
          ;; Do nothing
          ))
@@ -171,7 +186,7 @@
     (print "Usage:\n"
            progname " [-h/--help]\n"
            progname " [-p/--port PORT] [--notls] [-c/--channnel CHANNEL]\n"
-           indent-str " [-v/--verbose] [-a/--allow-reload]"
+           indent-str " [-v/--verbose] [-a/--allow-reload]\n"
            indent-str " proc-file host nick")))
 
 (define (main)
@@ -215,7 +230,9 @@
                    (set! bot-proc-file procfile)
                    (set! irc-host host)
                    (set! bot-nick nick)
-                   (launch-bot))
+                   (if  (load-bot)
+                        (launch-bot)
+                        (error "Could not load bot procedure.")))
                   (else
                    (print "One or more invalid arguments.")
                    (print-usage progname)))))))))
-- 
2.20.1