Move notification creation into new function

main.go

@@ -43,6 +43,74 @@ type notification struct {
 	tags     string
 }
 
+func (rcv *receiver) newNotification(p *payload) *notification {
+	n := new(notification)
+
+	// create title
+	count := len(p.Alerts)
+	title := fmt.Sprintf("[%s", strings.ToUpper(p.Status))
+	if p.Status == "firing" {
+		title = fmt.Sprintf("%s:%d", title, count)
+	}
+
+	title += "]"
+	for _, value := range p.GroupLabels {
+		title = fmt.Sprintf("%s %s", title, value)
+	}
+	n.title = title
+
+	// create body
+	var body string
+	c := cases.Title(language.English)
+
+	for _, alert := range p.Alerts {
+		alertBody := fmt.Sprintf("%s\nLabels:\n", c.String(alert.Status))
+		for key, value := range alert.Labels {
+			alertBody = fmt.Sprintf("%s%s = %s\n", alertBody, key, value)
+		}
+
+		alertBody += "Annotations:\n"
+		for key, value := range alert.Annotations {
+			alertBody = fmt.Sprintf("%s%s = %s\n", alertBody, key, value)
+		}
+
+		alertBody += "\n"
+
+		body += alertBody
+	}
+	n.body = body
+
+	var priority string
+	var tags []string
+	for _, labelName := range rcv.cfg.labels.Order {
+		val, ok := p.CommonLabels[labelName]
+		if !ok {
+			continue
+		}
+
+		labelConfig, ok := rcv.cfg.labels.Label[fmt.Sprintf("%s:%s", labelName, val)]
+		if !ok {
+			continue
+		}
+
+		if priority == "" {
+			priority = labelConfig.Priority
+		}
+
+		for _, val := range labelConfig.Tags {
+			if !sliceContains(tags, val) {
+				tags = append(tags, val)
+			}
+		}
+	}
+
+	tagString := strings.Join(tags, ",")
+	n.priority = priority
+	n.tags = tagString
+
+	return n
+}
+
 func (rcv *receiver) publish(n *notification) error {
 	client := &http.Client{Timeout: time.Second * 3}
 	req, err := http.NewRequest(http.MethodPost, rcv.cfg.ntfy.Topic, strings.NewReader(n.body))
@@ -101,63 +169,7 @@ func (rcv *receiver) handleWebhooks(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	count := len(event.Alerts)
+	notification := rcv.newNotification(&event)
-	title := fmt.Sprintf("[%s", strings.ToUpper(event.Status))
-	if event.Status == "firing" {
-		title = fmt.Sprintf("%s:%d", title, count)
-	}
-
-	title += "]"
-	for _, value := range event.GroupLabels {
-		title = fmt.Sprintf("%s %s", title, value)
-	}
-
-	var body string
-	c := cases.Title(language.English)
-
-	for _, alert := range event.Alerts {
-		alertBody := fmt.Sprintf("%s\nLabels:\n", c.String(alert.Status))
-		for key, value := range alert.Labels {
-			alertBody = fmt.Sprintf("%s%s = %s\n", alertBody, key, value)
-		}
-
-		alertBody += "Annotations:\n"
-		for key, value := range alert.Annotations {
-			alertBody = fmt.Sprintf("%s%s = %s\n", alertBody, key, value)
-		}
-
-		alertBody += "\n"
-
-		body += alertBody
-	}
-
-	var priority string
-	var tags []string
-	for _, labelName := range rcv.cfg.labels.Order {
-		val, ok := event.CommonLabels[labelName]
-		if !ok {
-			continue
-		}
-
-		labelConfig, ok := rcv.cfg.labels.Label[fmt.Sprintf("%s:%s", labelName, val)]
-		if !ok {
-			continue
-		}
-
-		if priority == "" {
-			priority = labelConfig.Priority
-		}
-
-		for _, val := range labelConfig.Tags {
-			if !sliceContains(tags, val) {
-				tags = append(tags, val)
-			}
-		}
-	}
-
-	tagString := strings.Join(tags, ",")
-
-	notification := &notification{title: title, body: body, priority: priority, tags: tagString}
 	err := rcv.publish(notification)
 	if err != nil {
 		rcv.logger.Error(err)