AWAY: Only dispatch AWAY when cap-notify is used

irc/client.go

@@ -255,11 +255,17 @@ func (c *Client) Id() string {
 }
 
 // Friends refers to clients that share a channel with this client.
-func (client *Client) Friends() ClientSet {
+func (client *Client) Friends(Capabilities ...Capability) ClientSet {
 	friends := make(ClientSet)
 	friends.Add(client)
 	for channel := range client.channels {
 		for member := range channel.members {
+			// make sure they have all the required caps
+			for _, Cap := range Capabilities {
+				if !member.capabilities[Cap] {
+					continue
+				}
+			}
 			friends.Add(member)
 		}
 	}

irc/server.go

@@ -862,7 +862,7 @@ func awayHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
 	client.Send(nil, server.name, "MODE", client.nick, client.nick, modech.String())
 
 	// dispatch away-notify
-	for friend := range client.Friends() {
+	for friend := range client.Friends(AwayNotify) {
 		if client.flags[Away] {
 			friend.SendFromClient(client, nil, client.nickMaskString, "AWAY", client.awayMessage)
 		} else {