Support quits from irc correctly. Fixes #722 (#724)

bridge/irc/handlers.go

@@ -92,6 +92,10 @@ func (b *Birc) handleJoinPart(client *girc.Client, event girc.Event) {
 			return
 		}
 		b.Log.Debugf("<= Sending JOIN_LEAVE event from %s to gateway", b.Account)
+		// QUIT isn't channel bound, happens for all channels on the bridge
+		if event.Command == "QUIT" {
+			channel = ""
+		}
 		msg := config.Message{Username: "system", Text: event.Source.Name + " " + strings.ToLower(event.Command) + "s", Channel: channel, Account: b.Account, Event: config.EventJoinLeave}
 		b.Log.Debugf("<= Message is %#v", msg)
 		b.Remote <- msg

gateway/gateway.go

@@ -176,7 +176,6 @@ func (gw *Gateway) getDestChannel(msg *config.Message, dest bridge.Bridge) []con
 
 	// discord join/leave is for the whole bridge, isn't a per channel join/leave
 	if msg.Event == config.EventJoinLeave && dest.Protocol == "discord" && msg.Account == dest.Account {
-		flog.Error("here")
 		for _, channel := range gw.Channels {
 			if channel.Account == msg.Account && strings.Contains(channel.Direction, "out") &&
 				gw.validGatewayDest(msg) {
@@ -186,6 +185,18 @@ func (gw *Gateway) getDestChannel(msg *config.Message, dest bridge.Bridge) []con
 		return channels
 	}
 
+	// irc quit is for the whole bridge, isn't a per channel quit.
+	// channel is empty when we quit
+	if msg.Event == config.EventJoinLeave && getProtocol(msg) == "irc" && msg.Channel == "" {
+		for _, channel := range gw.Channels {
+			if channel.Account == dest.Account && strings.Contains(channel.Direction, "out") &&
+				gw.validGatewayDest(msg) {
+				channels = append(channels, *channel)
+			}
+		}
+		return channels
+	}
+
 	// if source channel is in only, do nothing
 	for _, channel := range gw.Channels {
 		// lookup the channel from the message
@@ -435,3 +446,8 @@ func (gw *Gateway) ignoreText(text string, input []string) bool {
 	}
 	return false
 }
+
+func getProtocol(msg *config.Message) string {
+	p := strings.Split(msg.Account, ".")
+	return p[0]
+}