Store when last successful refresh happened

src/statusscreen/SL.go

@@ -15,6 +15,7 @@ import (
 type SL struct {
 	Config       *Config
 	lastResponse SLResponse
+	lastRefresh  int64
 }
 
 // SLResponse is a struct to get the interesting data from API Responses
@@ -58,6 +59,7 @@ func (sl *SL) GetOutput() string {
 	// If no error occured, save the latest data to the struct
 	if err == nil {
 		sl.lastResponse = sldata
+		sl.lastRefresh = time.Now().Unix()
 	}
 
 	if err != nil {