Support sending file URLs (nctalk) (#1489)

* nctalk: support sending file URLs

Signed-off-by: Gary Kim <gary@garykim.dev>

* nctalk: reduce nesting

Co-authored-by: Wim <wim@42.be>
Signed-off-by: Gary Kim <gary@garykim.dev>

Co-authored-by: Wim <wim@42.be>

bridge/nctalk/nctalk.go

@@ -135,9 +135,19 @@ func (b *Btalk) Send(msg config.Message) (string, error) {
 	if msg.Event != "" {
 		return "", nil
 	}
+
+	// Handle sending files if they are included
+	err := b.handleSendingFile(&msg, r)
+	if err != nil {
+		b.Log.Errorf("Could not send files in message to room %v from %v: %v", msg.Channel, msg.Username, err)
+
+		return "", nil
+	}
+
 	sentMessage, err := r.room.SendMessage(msg.Username + msg.Text)
 	if err != nil {
 		b.Log.Errorf("Could not send message to room %v from %v: %v", msg.Channel, msg.Username, err)
+
 		return "", nil
 	}
 	return strconv.Itoa(sentMessage.ID), nil
@@ -177,6 +187,27 @@ func (b *Btalk) handleFiles(mmsg *config.Message, message *ocs.TalkRoomMessageDa
 	return nil
 }
 
+func (b *Btalk) handleSendingFile(msg *config.Message, r *Broom) error {
+	for _, f := range msg.Extra["file"] {
+		fi := f.(config.FileInfo)
+		if fi.URL == "" {
+			continue
+		}
+
+		message := msg.Username
+		if fi.Comment != "" {
+			message += fi.Comment + " "
+		}
+		message += fi.URL
+		_, err := r.room.SendMessage(message)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 // Spec: https://github.com/nextcloud/server/issues/1706#issue-182308785
 func formatRichObjectString(message string, parameters map[string]ocs.RichObjectString) string {
 	for id, parameter := range parameters {