kike: implement CAP echo-message

1 files changed, 15 insertions, 3 deletions

diff --git a/kike.c b/kike.c
index 824566a..2909b5f 100644
--- a/kike.c
+++ b/kike.c
@@ -296,7 +296,8 @@ enum
 enum
 {
 	IRC_CAP_MULTI_PREFIX             = (1 << 0),
-	IRC_CAP_INVITE_NOTIFY            = (1 << 1)
+	IRC_CAP_INVITE_NOTIFY            = (1 << 1),
+	IRC_CAP_ECHO_MESSAGE             = (1 << 2)
 };
 
 struct client
@@ -1145,7 +1146,8 @@ irc_handle_cap_ls (struct client *c, struct irc_cap_args *a)
 			a->subcommand, "Ignoring invalid protocol version number");
 
 	c->cap_negotiating = true;
-	client_send (c, "CAP %s LS :multi-prefix invite-notify", a->target);
+	client_send (c, "CAP %s LS :multi-prefix invite-notify echo-message",
+		a->target);
 }
 
 static void
@@ -1158,6 +1160,8 @@ irc_handle_cap_list (struct client *c, struct irc_cap_args *a)
 		str_vector_add (&caps, "multi-prefix");
 	if (c->caps_enabled & IRC_CAP_INVITE_NOTIFY)
 		str_vector_add (&caps, "invite-notify");
+	if (c->caps_enabled & IRC_CAP_ECHO_MESSAGE)
+		str_vector_add (&caps, "echo-message");
 
 	char *caps_str = join_str_vector (&caps, ' ');
 	str_vector_free (&caps);
@@ -1172,6 +1176,8 @@ irc_decode_capability (const char *name)
 		return IRC_CAP_MULTI_PREFIX;
 	if (!strcmp (name, "invite-notify"))
 		return IRC_CAP_INVITE_NOTIFY;
+	if (!strcmp (name, "echo-message"))
+		return IRC_CAP_ECHO_MESSAGE;
 	return 0;
 }
 
@@ -1969,6 +1975,11 @@ irc_handle_user_message (const struct irc_message *msg, struct client *c,
 			c->nickname, c->username, c->hostname, command, target, text);
 		if (allow_away_reply && client->away_message)
 			irc_send_reply (c, IRC_RPL_AWAY, target, client->away_message);
+
+		// Acknowledging a message from the client to itself would be silly
+		if (client != c && (c->caps_enabled & IRC_CAP_ECHO_MESSAGE))
+			client_send (c, ":%s!%s@%s %s %s :%s",
+				c->nickname, c->username, c->hostname, command, target, text);
 		return;
 	}
 
@@ -1987,7 +1998,8 @@ irc_handle_user_message (const struct irc_message *msg, struct client *c,
 
 		char *message = xstrdup_printf (":%s!%s@%s %s %s :%s",
 			c->nickname, c->username, c->hostname, command, target, text);
-		irc_channel_multicast (chan, message, c);
+		irc_channel_multicast (chan, message,
+			(c->caps_enabled & IRC_CAP_ECHO_MESSAGE) ? NULL : c);
 		free (message);
 		return;
 	}