Add UserTypingSupport (discord) (#914)

* Add Discord to UserTypingSupport

* discord: start typing in a channel on EventUserTyping receive

* discord: emit EventUserTyping to gateway

bridge/discord/discord.go

@@ -72,6 +72,7 @@ func (b *Bdiscord) Connect() error {
 	}
 	b.Log.Info("Connection succeeded")
 	b.c.AddHandler(b.messageCreate)
+	b.c.AddHandler(b.messageTyping)
 	b.c.AddHandler(b.memberUpdate)
 	b.c.AddHandler(b.messageUpdate)
 	b.c.AddHandler(b.messageDelete)
@@ -188,6 +189,14 @@ func (b *Bdiscord) Send(msg config.Message) (string, error) {
 		return "", fmt.Errorf("Could not find channelID for %v", msg.Channel)
 	}
 
+	if msg.Event == config.EventUserTyping {
+		if b.GetBool("ShowUserTyping") {
+			err := b.c.ChannelTyping(channelID)
+			return "", err
+		}
+		return "", nil
+	}
+
 	// Make a action /me of the message
 	if msg.Event == config.EventUserAction {
 		msg.Text = "_" + msg.Text + "_"

bridge/discord/handlers.go

@@ -37,6 +37,19 @@ func (b *Bdiscord) messageDeleteBulk(s *discordgo.Session, m *discordgo.MessageD
 	}
 }
 
+func (b *Bdiscord) messageTyping(s *discordgo.Session, m *discordgo.TypingStart) {
+	if !b.GetBool("ShowUserTyping") {
+		return
+	}
+
+	rmsg := config.Message{Account: b.Account, Event: config.EventUserTyping}
+	rmsg.Channel = b.getChannelName(m.ChannelID)
+	if b.useChannelID {
+		rmsg.Channel = "ID:" + m.ChannelID
+	}
+	b.Remote <- rmsg
+}
+
 func (b *Bdiscord) messageUpdate(s *discordgo.Session, m *discordgo.MessageUpdate) { //nolint:unparam
 	if b.GetBool("EditDisable") {
 		return

gateway/bridgemap/bridgemap.go

@@ -40,6 +40,7 @@ var (
 	}
 
 	UserTypingSupport = map[string]struct{}{
-		"slack": {},
+		"slack":   {},
+		"discord": {},
 	}
 )