feat: select optional sensors to read humidity or temperature

pkg/cli/cli.go

@@ -9,6 +9,63 @@ import (
 	"git.cryptic.systems/fh-trier/go-flucky/pkg/types"
 )
 
+func PrintHumidities(humidities []*types.Humidity, cnf *config.FluckyConfig, w io.Writer) {
+	// determine all humidity sensors based on the humidiy values
+	sensors := []*types.Sensor{}
+	for _, humidity := range humidities {
+		// Search for the sensor that has acquired the measured value
+		for _, sensor := range cnf.Sensors {
+			if sensor.SensorID == humidity.SensorID {
+				sensors = append(sensors, sensor)
+				break
+			}
+		}
+		// If it was not found, pass only the sensor with the UUID on
+		sensor := &types.Sensor{
+			SensorID: humidity.SensorID,
+		}
+		sensors = append(sensors, sensor)
+	}
+
+	// sort temperature values for every sensor
+	orderedHumidities := make(map[string][]*types.Humidity)
+	for _, humidity := range humidities {
+		orderedHumidities[humidity.SensorID] = append(orderedHumidities[humidity.SensorID], humidity)
+	}
+
+	// declare tabwriter
+	tw := tabwriter.NewWriter(w, 0, 0, 3, ' ', 0)
+
+	// headlines
+	for i, sensor := range sensors {
+		fmt.Fprintf(tw, "%v\t", sensor.Name())
+		if i == len(sensors)-1 {
+			fmt.Fprintf(tw, "\n")
+		}
+	}
+
+	// find sensor with maximum temperature values
+	maxLength := 0
+	for _, orderedHumidity := range orderedHumidities {
+		if len(orderedHumidity) > maxLength {
+			maxLength = len(orderedHumidity)
+		}
+	}
+
+	// body
+	for i := 0; i < maxLength; i++ {
+		for _, sensor := range sensors {
+			if len(orderedHumidities[sensor.SensorID]) > i {
+				fmt.Fprintf(tw, "%3.3f\t", orderedHumidities[sensor.SensorID][i].HumidityValue)
+			} else {
+				fmt.Fprint(tw, "\t")
+			}
+			fmt.Fprint(tw, "\n")
+		}
+	}
+	tw.Flush()
+}
+
 func PrintTemperatures(temperatures []*types.Temperature, cnf *config.FluckyConfig, w io.Writer) {
 
 	sensors := []*types.Sensor{}