From 9eecf946f8dd6a68b435c419f3282076853d9bcc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Magnus=20=C3=85hall?= <magnus.ahall@gibon.se>
Date: Thu, 30 May 2024 13:31:51 +0200
Subject: [PATCH] Configurable interval for nodata checks

---
 config.go | 3 ++-
 main.go   | 6 +++++-
 nodata.go | 2 +-
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/config.go b/config.go
index 150fa1d..6ac26a3 100644
--- a/config.go
+++ b/config.go
@@ -1,5 +1,6 @@
 package main
 
 type SmonConfiguration struct {
-	LogFile string
+	LogFile        string
+	NodataInterval int `json:"nodata_interval"` // in seconds
 }
diff --git a/main.go b/main.go
index 859e59f..085ea5c 100644
--- a/main.go
+++ b/main.go
@@ -38,6 +38,7 @@ var (
 	parsedTemplates     map[string]*template.Template
 	componentFilenames  []string
 	notificationManager notification.Manager
+	smonConf            SmonConfiguration
 
 	//go:embed sql
 	sqlFS embed.FS
@@ -88,7 +89,6 @@ func main() { // {{{
 		os.Exit(1)
 	}
 
-	smonConf := SmonConfiguration{}
 	j, _ := json.Marshal(service.Config.Application)
 	json.Unmarshal(j, &smonConf)
 	logFile, err = os.OpenFile(smonConf.LogFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0600)
@@ -96,6 +96,10 @@ func main() { // {{{
 		logger.Error("application", "error", err)
 		return
 	}
+	if smonConf.NodataInterval < 10 {
+		logger.Error("application → nodata_interval has to be larger or equal to 10.")
+		return
+	}
 
 	service.SetDatabase(sqlProvider)
 	service.SetStaticFS(staticFS, "static")
diff --git a/nodata.go b/nodata.go
index a6cba54..ea09de9 100644
--- a/nodata.go
+++ b/nodata.go
@@ -25,7 +25,7 @@ func nodataLoop() {
 	var err error
 
 	// TODO - should be configurable
-	ticker := time.NewTicker(time.Second * 5)
+	ticker := time.NewTicker(time.Second * time.Duration(smonConf.NodataInterval))
 	for {
 		<-ticker.C
 		datapoints, err = nodataDatapoints()