Move error handling

src/statusscreen/SL.go

@@ -52,7 +52,11 @@ func (sl *SL) GetOutput() string {
 		"Expcted",
 	})
 
-	sldata := sl.getTimeTable()
+	sldata, err := sl.getTimeTable()
+
+	if err != nil {
+		log.Fatal(err)
+	}
 
 	for _, v := range sldata.ResponseData.Metros {
 		table.Append([]string{
@@ -69,7 +73,7 @@ func (sl *SL) GetOutput() string {
 	return b.String()
 }
 
-func (sl *SL) getTimeTable() SLResponse {
+func (sl *SL) getTimeTable() (SLResponse, error) {
 	parsedResponse := SLResponse{}
 
 	// Construct URL with APIKey and Site
@@ -83,22 +87,22 @@ func (sl *SL) getTimeTable() SLResponse {
 	// Do request
 	resp, err := client.Get(url)
 	if err != nil {
-		log.Fatal(err)
+		return parsedResponse, err
 	}
 
 	// Read response
 	body, readErr := ioutil.ReadAll(resp.Body)
 	if readErr != nil {
-		log.Fatal(readErr)
+		return parsedResponse, readErr
 	}
 
 	// Parse response from SL
 	parseErr := json.Unmarshal(body, &parsedResponse)
 	if parseErr != nil {
-		log.Fatal(parseErr)
+		return parsedResponse, parseErr
 	}
 
-	return parsedResponse
+	return parsedResponse, nil
 }
 
 func (sl *SL) formatDisplayTime(expected string) string {