feat(daemon): add new subcommand to start a daemon

pkg/logfile/logfile.go

@@ -74,6 +74,20 @@ func ReadTemperatures(temperatureLogfile string) ([]*types.Temperature, error) {
 	return temperatures, nil
 }
 
+func ReadTemperaturesChannel(temperatureChannel <-chan *types.Temperature) []*types.Temperature {
+	temperatures := make([]*types.Temperature, 0)
+	for {
+		select {
+		case temperature, more := <-temperatureChannel:
+			if more {
+				temperatures = append(temperatures, temperature)
+			}
+		default:
+			return temperatures
+		}
+	}
+}
+
 // ReadTemperaturesCustom from a custom reader and returns an array with
 // temperatures
 func ReadTemperaturesCustom(r io.Reader) ([]*types.Temperature, error) {
@@ -172,7 +186,7 @@ func WriteTemperaturesCustom(temperatures []*types.Temperature, w io.Writer, com
 	writeCreationDate(temperatures)
 
 	jsonEncoder := json.NewEncoder(w)
-	jsonEncoder.SetIndent("", " ")
+	jsonEncoder.SetIndent("", "  ")
 	err := jsonEncoder.Encode(temperatures)
 	if err != nil {
 		return fmt.Errorf("Can not encode temperatures: %v", err)