Support ntfy tags

config.go

@@ -29,6 +29,7 @@ type labels struct {
 
 type labelConfig struct {
 	Priority string
+	Tags     []string
 }
 
 func readConfig(path string) (*config, error) {
@@ -101,6 +102,16 @@ func readConfig(path string) (*config, error) {
 					}
 				}
 
+				d = labelDir.Children.Get("tags")
+				if d != nil {
+					var tags string
+					if err := d.ParseParams(&tags); err != nil {
+						return nil, err
+					}
+
+					labelConfig.Tags = strings.Split(tags, ",")
+				}
+
 				labels[fmt.Sprintf("%s:%s", labelName, name)] = *labelConfig
 			}
 		}

functions.go

@@ -0,0 +1,11 @@
+package main
+
+func sliceContains(s []string, e string) bool {
+	for _, v := range s {
+		if e == v {
+			return true
+		}
+	}
+
+	return false
+}

main.go

@@ -100,6 +100,7 @@ func (rcv *receiver) handleWebhooks(w http.ResponseWriter, r *http.Request) {
 	req.Header.Set("X-Title", title)
 
 	var priority string
+	var tags []string
 	for _, labelName := range rcv.cfg.labels.Order {
 		val, ok := event.CommonLabels[labelName]
 		if !ok {
@@ -114,12 +115,23 @@ func (rcv *receiver) handleWebhooks(w http.ResponseWriter, r *http.Request) {
 		if priority == "" {
 			priority = labelConfig.Priority
 		}
+
+		for _, val := range labelConfig.Tags {
+			if !sliceContains(tags, val) {
+				tags = append(tags, val)
+			}
+		}
 	}
 
 	if priority != "" {
 		req.Header.Set("X-Priority", priority)
 	}
 
+	tagString := strings.Join(tags, ",")
+	if tagString != "" {
+		req.Header.Set("X-Tags", tagString)
+	}
+
 	resp, err := client.Do(req)
 	if err != nil {
 		rcv.logger.Error(err)