From 5a8a85f0f9462a99be8f7fba22032de7cff13573 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thorben=20G=C3=BCnther?= <admin@xenrox.net>
Date: Tue, 21 Feb 2023 14:37:26 +0100
Subject: [PATCH] Sort labels alphabetically

Closes: https://todo.xenrox.net/~xenrox/ntfy-alertmanager/13
---
 functions.go | 12 ++++++++++++
 main.go      | 11 +++++++----
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/functions.go b/functions.go
index 8395f8e..642195d 100644
--- a/functions.go
+++ b/functions.go
@@ -1,5 +1,7 @@
 package main
 
+import "sort"
+
 func sliceContains(s []string, e string) bool {
 	for _, v := range s {
 		if e == v {
@@ -9,3 +11,13 @@ func sliceContains(s []string, e string) bool {
 
 	return false
 }
+
+func sortKeys(m map[string]string) []string {
+	var s []string
+	for key := range m {
+		s = append(s, key)
+	}
+
+	sort.Strings(s)
+	return s
+}
diff --git a/main.go b/main.go
index 344830d..e6b71a3 100644
--- a/main.go
+++ b/main.go
@@ -79,8 +79,9 @@ func (br *bridge) singleAlertNotifications(p *payload) []*notification {
 
 		// create body
 		n.body = "Labels:\n"
-		for key, value := range alert.Labels {
-			n.body = fmt.Sprintf("%s%s = %s\n", n.body, key, value)
+		sortedLabelKeys := sortKeys(alert.Labels)
+		for _, key := range sortedLabelKeys {
+			n.body = fmt.Sprintf("%s%s = %s\n", n.body, key, alert.Labels[key])
 		}
 
 		n.body += "\nAnnotations:\n"
@@ -168,8 +169,10 @@ func (br *bridge) multiAlertNotification(p *payload) *notification {
 
 	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)
+
+		sortedLabelKeys := sortKeys(alert.Labels)
+		for _, key := range sortedLabelKeys {
+			alertBody = fmt.Sprintf("%s%s = %s\n", alertBody, key, alert.Labels[key])
 		}
 
 		alertBody += "Annotations:\n"