fix: cli temperature read

changes:
- fix: read temperature values without daemon
  Add subcommand to read temperature values without starting the daemon

- fix: implement measured value types
  Replace measured value types with constants

- fix: add sensor pipelines
  Add functions which returns a channel with measured values

- fix: filter measured values from a channel
  Add functions to filter measured values by sensor id or measured
  value types.

cli/root.go

@@ -10,6 +10,7 @@ import (
 
 	"git.cryptic.systems/volker.raschek/flucky/cli/daemon"
 	"git.cryptic.systems/volker.raschek/flucky/cli/sensor"
+	"git.cryptic.systems/volker.raschek/flucky/cli/temperature"
 	"git.cryptic.systems/volker.raschek/flucky/pkg/config"
 	"github.com/Masterminds/semver"
 
@@ -38,6 +39,7 @@ func Execute(version *semver.Version) error {
 	subCommands := []func(cmd *cobra.Command) error{
 		daemon.InitCmd,
 		sensor.InitCmd,
+		temperature.InitCmd,
 	}
 
 	for _, subCommand := range subCommands {

cli/temperature/temperature.go

@@ -0,0 +1,133 @@
+package temperature
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+
+	"git.cryptic.systems/volker.raschek/flucky/pkg/cli"
+	"git.cryptic.systems/volker.raschek/flucky/pkg/config"
+	"git.cryptic.systems/volker.raschek/flucky/pkg/repository"
+	"git.cryptic.systems/volker.raschek/flucky/pkg/sensor"
+	"git.cryptic.systems/volker.raschek/flucky/pkg/types"
+	"git.cryptic.systems/volker.raschek/go-logger"
+	"github.com/spf13/cobra"
+)
+
+func InitCmd(cmd *cobra.Command) error {
+	temperatureCmd := &cobra.Command{
+		Use:   "temperature",
+		Short: "Read and list temperature values",
+	}
+
+	readTemperatureCmd := &cobra.Command{
+		Use:   "read",
+		Short: "Read temperature values from sensors",
+		RunE:  readTemperature,
+	}
+	readTemperatureCmd.Flags().Bool("persist", true, "Persist measured values to the repository")
+
+	temperatureCmd.AddCommand(readTemperatureCmd)
+	cmd.AddCommand(temperatureCmd)
+
+	return nil
+}
+
+func readTemperature(cmd *cobra.Command, args []string) error {
+	configFile, err := cmd.Flags().GetString("config")
+	if err != nil {
+		return fmt.Errorf("No config file defined")
+	}
+
+	persist, err := cmd.Flags().GetBool("persist")
+	if err != nil {
+		return fmt.Errorf("Flag persist not defined: %v", err)
+	}
+
+	cnf, err := config.Read(configFile)
+	if err != nil {
+		return err
+	}
+
+	dsnURL, err := url.Parse(cnf.DSN)
+	if err != nil {
+		return err
+	}
+
+	logLevelString, err := cmd.Flags().GetString("loglevel")
+	if err != nil {
+		return err
+	}
+
+	logLevel, err := logger.ParseLogLevel(logLevelString)
+	if err != nil {
+		return err
+	}
+
+	flogger := logger.NewLogger(logLevel)
+
+	repo, err := repository.New(dsnURL, flogger)
+	if err != nil {
+		return err
+	}
+
+	sensorTypes, err := repo.GetSensors()
+	if err != nil {
+		return err
+	}
+
+	sensorTypes, err = types.FilterSensorByMeasuredValueTypes(sensorTypes, types.Temperature)
+	if err != nil {
+		return err
+	}
+
+	sensors := make([]sensor.Sensor, 0)
+	for i := range sensorTypes {
+		s, err := sensor.New(sensorTypes[i])
+		if err != nil {
+			return err
+		}
+		sensors = append(sensors, s)
+	}
+
+	measuredValueChannel, errorChannel := sensor.ReadPipeline(context.TODO(), sensors...)
+
+	go func() {
+		for {
+			select {
+			case err, open := <-errorChannel:
+				if !open {
+					return
+				}
+				flogger.Error("%v", err)
+			}
+		}
+	}()
+
+	measuredValues := make([]*types.MeasuredValue, 0)
+LOOP:
+	for {
+		select {
+		case measuredValue, open := <-measuredValueChannel:
+			if !open {
+				break LOOP
+			}
+			measuredValues = append(measuredValues, measuredValue)
+		}
+	}
+
+	err = cli.PrintMeasuredValues(measuredValues, os.Stdout)
+	if err != nil {
+		return err
+	}
+
+	if persist {
+		err = repo.AddMeasuredValues(measuredValues...)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}