fix: add, rename and remove sensor

changes:
- Implement function to add, rename and remove sensors

cli/daemon/daemon.go

@@ -0,0 +1,48 @@
+package daemon
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/volker-raschek/flucky/pkg/config"
+	"github.com/volker-raschek/flucky/pkg/daemon"
+	"github.com/volker-raschek/go-logger/pkg/logger"
+)
+
+// InitCmd initialize all daemon subcommands
+func InitCmd(cmd *cobra.Command) error {
+	daemonCmd := &cobra.Command{
+		Use:     "daemon",
+		Short:   "Read continuously data from all enabled sensors",
+		Example: "flucky daemon",
+		RunE:    run,
+	}
+
+	daemonCmd.Flags().Bool("compression", true, "Compress measured values")
+	daemonCmd.Flags().Uint("cached-values", 500, "Number of cached values before saveing into the storage endpoint")
+	daemonCmd.Flags().Float64("round", 0.5, "Round values. The value 0 deactivates the function")
+	cmd.AddCommand(daemonCmd)
+
+	return nil
+}
+
+func run(cmd *cobra.Command, args []string) error {
+	configFile, err := cmd.Flags().GetString("config")
+	if err != nil {
+		return fmt.Errorf("No config file defined: %v", err)
+	}
+
+	// logLevel, err := cmd.Flags().GetString("loglevel")
+	// if err != nil {
+	// 	return fmt.Errorf("No loglevel defined: %v", err)
+	// }
+
+	flogger := logger.NewDefaultLogger(logger.LogLevelDebug)
+
+	cnf, err := config.Read(configFile)
+	if err != nil {
+		return err
+	}
+
+	return daemon.Start(cnf, flogger)
+}

cli/root.go

@@ -0,0 +1,112 @@
+package cli
+
+import (
+	"fmt"
+	"math"
+	"os"
+	"os/user"
+	"path/filepath"
+	"time"
+
+	"github.com/Masterminds/semver"
+	"github.com/volker-raschek/flucky/cli/daemon"
+	"github.com/volker-raschek/flucky/cli/sensor"
+	"github.com/volker-raschek/flucky/pkg/config"
+	"github.com/volker-raschek/flucky/pkg/types"
+
+	uuid "github.com/satori/go.uuid"
+	"github.com/spf13/cobra"
+)
+
+// Execute a
+func Execute(version *semver.Version) error {
+
+	rootCmd := &cobra.Command{
+		Use: "flucky",
+		// Short:             "flucky - operate with differen sensors, his values and remote servers to synchronize measured values",
+		PersistentPreRunE: preRunError,
+		Version:           version.String(),
+	}
+
+	defaultConfigFile, err := getDefaultConfigFile()
+	if err != nil {
+		return err
+	}
+
+	rootCmd.PersistentFlags().String("config", defaultConfigFile, "Config file")
+	rootCmd.PersistentFlags().String("loglevel", "info", "Set the Loglevel. Possible values: debug, info, warn, error, fatal")
+
+	subCommands := []func(cmd *cobra.Command) error{
+		daemon.InitCmd,
+		sensor.InitCmd,
+	}
+
+	for _, subCommand := range subCommands {
+		if err := subCommand(rootCmd); err != nil {
+			return err
+		}
+	}
+
+	err = rootCmd.Execute()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func preRunError(cmd *cobra.Command, args []string) error {
+
+	configFile := cmd.Flag("config").Value.String()
+
+	// check if config file exists
+	if _, err := os.Stat(configFile); os.IsNotExist(err) {
+
+		hostname, err := os.Hostname()
+		if err != nil {
+			return fmt.Errorf("Failed to determine the hostname: %v", err)
+		}
+
+		// Time must be truncted for postgres. Postgres currently does not support
+		// nanoseconds which is automatically include into the go time object
+		postgresTimeStamp := time.Now()
+		location, err := time.LoadLocation("Europe/Berlin")
+		if err != nil {
+			return err
+		}
+		postgresTimeStamp = time.Date(postgresTimeStamp.Year(), postgresTimeStamp.Month(), postgresTimeStamp.Day(), postgresTimeStamp.Hour(), postgresTimeStamp.Minute(), postgresTimeStamp.Second(), int(math.Round(float64(postgresTimeStamp.Nanosecond())/1000000)*1000000), location)
+
+		// Default configuration
+		cnf := config.Config{
+			Device: &types.Device{
+				ID:           uuid.NewV4().String(),
+				Name:         hostname,
+				CreationDate: postgresTimeStamp,
+			},
+			StorageEndpoint: "file:/var/log/flucky/sqlite.db?cache=shared&mode=memory",
+		}
+
+		err = config.Write(&cnf, configFile)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// GetDefaultConfigPath returns the default path to the configuration of
+// rpm-distributor
+func getDefaultConfigFile() (string, error) {
+	u, err := user.Current()
+	if err != nil {
+		return "", fmt.Errorf("Can not read current user: %v", err)
+	}
+
+	switch u.Uid {
+	case "0":
+		return "/etc/flucky/config.json", nil
+	default:
+		return filepath.Join(u.HomeDir, ".config/flucky/config.json"), nil
+	}
+}

cli/sensor/sensor.go

@@ -0,0 +1,307 @@
+package sensor
+
+import (
+	"fmt"
+	"os"
+
+	uuid "github.com/satori/go.uuid"
+	"github.com/spf13/cobra"
+	"github.com/volker-raschek/flucky/pkg/cli"
+	"github.com/volker-raschek/flucky/pkg/config"
+	"github.com/volker-raschek/flucky/pkg/types"
+)
+
+// InitCmd initialize all sensor subcommands
+func InitCmd(cmd *cobra.Command) error {
+	sensorCmd := &cobra.Command{
+		Use:   "sensor",
+		Short: "Manage Sensors",
+	}
+
+	addSensorCmd := &cobra.Command{
+		Use:     "add",
+		Short:   "Add Sensor",
+		Aliases: []string{"append"},
+		Args:    cobra.ExactArgs(2),
+		Example: `flucky sensor add --gpio GPIO14 indoor DHT11
+flucky sensor add --wire-id 28-011432f0bb3d outdoor DS18B20
+flucky sensor add --i2c-bus 1 --i2c-address 0x76 wetter-station BME280`,
+		RunE: addSensor,
+	}
+	addSensorCmd.Flags().Bool("enabled", true, "Enable new sensor")
+	addSensorCmd.Flags().String("gpio", "", "Defines the GPIO port")
+	addSensorCmd.Flags().Uint8("i2c-address", 0, "Defines the I2C address on the I2C bus")
+	addSensorCmd.Flags().Int("i2c-bus", 0, "Defines the I2C bus")
+	addSensorCmd.Flags().String("location", "", "Location of the sensor")
+	addSensorCmd.Flags().String("tick-duration", "1m", "Specifies how often measured values should be read from the sensor")
+	addSensorCmd.Flags().String("wire-id", "", "Defines the Wire-ID")
+
+	disableSensorCmd := &cobra.Command{
+		Use:     "disable",
+		Short:   "Disable Sensor",
+		Args:    cobra.ExactArgs(1),
+		Example: "flucky sensor disable outdoor",
+		RunE:    disableSensor,
+	}
+
+	enableSensorCmd := &cobra.Command{
+		Use:     "enable",
+		Short:   "Enable Sensor",
+		Example: "flucky sensor enable outdoor",
+		Args:    cobra.ExactArgs(1),
+		RunE:    enableSensor,
+	}
+
+	listSensorCmd := &cobra.Command{
+		Use:     "list",
+		Short:   "List Sensors",
+		Aliases: []string{"ls"},
+		RunE:    listSensors,
+	}
+
+	removeSensorCmd := &cobra.Command{
+		Use:     "remove",
+		Short:   "Remove Sensor",
+		Aliases: []string{"rm"},
+		Example: "flucky sensor remove outdoor",
+		Args:    cobra.ExactArgs(1),
+		RunE:    removeSensor,
+	}
+	removeSensorCmd.Flags().Bool("definitive", true, "Remove the sensor definitive from the backend")
+
+	renameSensorCmd := &cobra.Command{
+		Use:   "rename",
+		Short: "Rename Sensor",
+		Args:  cobra.ExactArgs(2),
+		Example: `flucky sensor rename indoor outdoor
+flucky sensor rename f98b00ea-a9b2-4e00-924f-113859d0af2d outdoor`,
+		RunE: renameSensor,
+	}
+
+	for _, subCommand := range []*cobra.Command{
+		addSensorCmd,
+		disableSensorCmd,
+		enableSensorCmd,
+		listSensorCmd,
+		removeSensorCmd,
+		renameSensorCmd,
+	} {
+		sensorCmd.AddCommand(subCommand)
+	}
+
+	cmd.AddCommand(sensorCmd)
+
+	return nil
+}
+
+func addSensor(cmd *cobra.Command, args []string) error {
+
+	sensor := &types.Sensor{
+		ID:    uuid.NewV4().String(),
+		Name:  args[0],
+		Model: args[1],
+	}
+
+	sensorLocation, err := cmd.Flags().GetString("location")
+	if err != nil {
+		return err
+	}
+	sensor.Location = sensorLocation
+
+	sensorEnabled, err := cmd.Flags().GetBool("enabled")
+	if err != nil {
+		return err
+	}
+	sensor.Enabled = sensorEnabled
+
+	sensorGPIO, err := cmd.Flags().GetString("gpio")
+	if err != nil {
+		return err
+	}
+	if len(sensorGPIO) > 0 {
+		sensor.GPIONumber = sensorGPIO
+	}
+
+	sensorI2CAddress, err := cmd.Flags().GetUint8("i2c-address")
+	if err != nil {
+		return err
+	}
+	if sensorI2CAddress > 0 {
+		sensor.I2CAddress = &sensorI2CAddress
+	}
+
+	sensorI2CBus, err := cmd.Flags().GetInt("i2c-bus")
+	if err != nil {
+		return err
+	}
+	if sensorI2CBus > 0 {
+		sensor.I2CBus = &sensorI2CBus
+	}
+
+	sensorTickDuration, err := cmd.Flags().GetString("tick-duration")
+	if err != nil {
+		return err
+	}
+	sensor.TickDuration = sensorTickDuration
+
+	sensorWireID, err := cmd.Flags().GetString("wire-id")
+	if err != nil {
+		return err
+	}
+	if len(sensorWireID) > 0 {
+		sensor.WireID = &sensorWireID
+	}
+
+	configFile, err := cmd.Flags().GetString("config")
+	if err != nil {
+		return fmt.Errorf("No config file defined")
+	}
+
+	cnf, err := config.Read(configFile)
+	if err != nil {
+		return err
+	}
+
+	// add sensor entry to list
+	err = cnf.AddSensor(sensor)
+	if err != nil {
+		return err
+	}
+
+	// save new configuration
+	err = config.Write(cnf, configFile)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func disableSensor(cmd *cobra.Command, args []string) error {
+
+	configFile, err := cmd.Flags().GetString("config")
+	if err != nil {
+		return fmt.Errorf("No config file defined")
+	}
+
+	cnf, err := config.Read(configFile)
+	if err != nil {
+		return err
+	}
+
+	err = cnf.DisableSensor(args[0])
+	if err != nil {
+		return err
+	}
+
+	err = config.Write(cnf, configFile)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func enableSensor(cmd *cobra.Command, args []string) error {
+
+	configFile, err := cmd.Flags().GetString("config")
+	if err != nil {
+		return fmt.Errorf("No config file defined")
+	}
+
+	cnf, err := config.Read(configFile)
+	if err != nil {
+		return err
+	}
+
+	err = cnf.EnableSensor(args[0])
+	if err != nil {
+		return err
+	}
+
+	err = config.Write(cnf, configFile)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func listSensors(cmd *cobra.Command, args []string) error {
+
+	configFile, err := cmd.Flags().GetString("config")
+	if err != nil {
+		return fmt.Errorf("No config file defined")
+	}
+
+	cnf, err := config.Read(configFile)
+	if err != nil {
+		return err
+	}
+
+	err = cli.PrintSensors(cnf, os.Stdout)
+	if err != nil {
+		return err
+	}
+
+	err = config.Write(cnf, configFile)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func removeSensor(cmd *cobra.Command, args []string) error {
+
+	configFile, err := cmd.Flags().GetString("config")
+	if err != nil {
+		return fmt.Errorf("No config file defined")
+	}
+
+	definitive, err := cmd.Flags().GetBool("definitive")
+	if err != nil {
+		return fmt.Errorf("No config file defined")
+	}
+
+	cnf, err := config.Read(configFile)
+	if err != nil {
+		return err
+	}
+
+	err = cnf.RemoveSensor(args[0], definitive)
+	if err != nil {
+		return err
+	}
+
+	err = config.Write(cnf, configFile)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func renameSensor(cmd *cobra.Command, args []string) error {
+
+	configFile, err := cmd.Flags().GetString("config")
+	if err != nil {
+		return fmt.Errorf("No config file defined")
+	}
+
+	cnf, err := config.Read(configFile)
+	if err != nil {
+		return err
+	}
+
+	err = cnf.RenameSensor(args[0], args[1])
+	if err != nil {
+		return err
+	}
+
+	err = config.Write(cnf, configFile)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

go.mod

@@ -3,13 +3,14 @@ module github.com/volker-raschek/flucky
 go 1.12
 
 require (
+	github.com/Masterminds/semver v1.5.0
 	github.com/d2r2/go-bsbmp v0.0.0-20190515110334-3b4b3aea8375
-	github.com/d2r2/go-i2c v0.0.0-20181113114621-14f8dd4e89ce
+	github.com/d2r2/go-i2c v0.0.0-20191123181816-73a8a799d6bc
 	github.com/d2r2/go-logger v0.0.0-20181221090742-9998a510495e
-	github.com/go-flucky/flucky v0.0.0-20190714170626-0dd156f480be
 	github.com/go-flucky/go-dht v0.1.1
 	github.com/lib/pq v1.4.0
 	github.com/satori/go.uuid v1.2.0
-	github.com/stretchr/testify v1.4.0
+	github.com/spf13/cobra v1.0.0
-	github.com/volker-raschek/go-logger v0.0.0-20190924132822-0c50a64d7f26
+	github.com/stretchr/testify v1.5.1
+	github.com/volker-raschek/go-logger v0.1.0
 )

go.sum

@@ -1,17 +1,67 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3QEww=
+github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
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+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
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+github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
+github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
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 github.com/d2r2/go-bsbmp v0.0.0-20190515110334-3b4b3aea8375 h1:vdUOwcZdV+bBfGUUh5oPPWSzw9p+lBnNSuGgQwGpCH4=
 github.com/d2r2/go-bsbmp v0.0.0-20190515110334-3b4b3aea8375/go.mod h1:3iz1WHlYJU9b4NJei+Q8G7DN3K05arcCMlOQ+qNCDjo=
 github.com/d2r2/go-i2c v0.0.0-20181113114621-14f8dd4e89ce h1:Dog7PLNz1fPaXqHPOHonpERqsF57Oh4X76pM80T1GDY=
 github.com/d2r2/go-i2c v0.0.0-20181113114621-14f8dd4e89ce/go.mod h1:AwxDPnsgIpy47jbGXZHA9Rv7pDkOJvQbezPuK1Y+nNk=
+github.com/d2r2/go-i2c v0.0.0-20191123181816-73a8a799d6bc h1:HLRSIWzUGMLCq4ldt0W1GLs3nnAxa5EGoP+9qHgh6j0=
+github.com/d2r2/go-i2c v0.0.0-20191123181816-73a8a799d6bc/go.mod h1:AwxDPnsgIpy47jbGXZHA9Rv7pDkOJvQbezPuK1Y+nNk=
 github.com/d2r2/go-logger v0.0.0-20181221090742-9998a510495e h1:ZG3JBA6rPRl0xxQ+nNSfO7tor8w+CNCTs05DNJQYbLM=
 github.com/d2r2/go-logger v0.0.0-20181221090742-9998a510495e/go.mod h1:oA+9PUt8F1aKJ6o4YU1T120i7sgo1T6/1LWEEBy0BSs=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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 github.com/go-flucky/flucky v0.0.0-20190714170626-0dd156f480be/go.mod h1:WNT729lCsTFhT6Vyvg6cG8aHV1t6p+DsA8l4omOuaos=
 github.com/go-flucky/go-dht v0.1.1 h1:dPz9F5D7oUaTd0GUGTvT4lBH2R043h1bkmhTlpQax1Y=
 github.com/go-flucky/go-dht v0.1.1/go.mod h1:Yk/cct+/u+eCS7pB/kc0tc7MrVXdFI4W15MJCj5FRUc=
+github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
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 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 periph.io/x/periph v3.4.0+incompatible h1:5gzxE4ryPq52cdqSw0mErR6pyJK8cBF2qdUAcOWh0bo=
 periph.io/x/periph v3.4.0+incompatible/go.mod h1:EWr+FCIU2dBWz5/wSWeiIUJTriYv9v2j2ENBmgYyy7Y=

main.go

@@ -2,11 +2,10 @@ package main
 
 import (
 	"log"
-	"strings"
+	"os"
 
-	"github.com/volker-raschek/flucky/pkg/config"
+	"github.com/Masterminds/semver"
-	"github.com/volker-raschek/flucky/pkg/daemon"
+	"github.com/volker-raschek/flucky/cli"
-	"github.com/volker-raschek/go-logger/pkg/logger"
 )
 
 var (
@@ -14,79 +13,11 @@ var (
 )
 
 func main() {
-	// sversion, err := semver.NewVersion(version)
+	sversion, err := semver.NewVersion(version)
-	// if err != nil {
-	// 	log.Printf("The sematic versioning is invalid: %v", version)
-	// 	os.Exit(1)
-	// }
-
-	cnfString := `{
-    "device": {
-      "id": "d0c600bc-6eab-4b9b-b93f-dc0477b4658f",
-      "name": "poseidon",
-      "location": null,
-      "last_contact": null,
-      "creation_date": "2020-04-23T22:09:20.932+02:00"
-    },
-    "storage_endpoint": "postgres://postgres:postgres@markus-pc.trier.cryptic.systems:5432/postgres?sslmode=disable",
-    "sensors": [
-      {
-        "id": "1c180121-9e98-4053-a6f6-4ed7fad3935b",
-        "name": "bme280",
-        "location": "",
-        "wire_id": null,
-        "i2c_bus": 1,
-        "i2c_address": 118,
-        "gpio_number": null,
-        "model": "BME280",
-        "enabled": true,
-        "last_contact": null,
-        "tick_duration": "5s",
-        "device_id": "d0c600bc-6eab-4b9b-b93f-dc0477b4658f",
-        "creation_date": "2020-04-23T22:09:20.934+02:00"
-      },
-      {
-        "id": "5cebd127-8976-4b66-b1bb-e551f26c4af4",
-        "name": "ds18b20_2",
-        "location": "",
-        "wire_id": "28-02131dbffeaa",
-        "i2c_bus": null,
-        "i2c_address": null,
-        "gpio_number": null,
-        "model": "DS18B20",
-        "enabled": true,
-        "last_contact": null,
-        "tick_duration": "1m",
-        "device_id": "d0c600bc-6eab-4b9b-b93f-dc0477b4658f",
-        "creation_date": "2020-04-23T22:09:27.901+02:00"
-      },
-      {
-        "id": "579628cc-b667-4b56-b305-73256c0c9dce",
-        "name": "ds18b20",
-        "location": "",
-        "wire_id": "28-01131646f11d",
-        "i2c_bus": null,
-        "i2c_address": null,
-        "gpio_number": null,
-        "model": "DS18B20",
-        "enabled": true,
-        "last_contact": null,
-        "tick_duration": "1m",
-        "device_id": "d0c600bc-6eab-4b9b-b93f-dc0477b4658f",
-        "creation_date": "2020-04-23T22:09:56.468+02:00"
-      }
-    ]
-  }`
-
-	cnf, err := config.Decode(strings.NewReader(cnfString))
 	if err != nil {
-		log.Fatal(err)
+		log.Printf("The sematic versioning is invalid: %v", version)
+		os.Exit(1)
 	}
 
-	flogger := logger.NewDefaultLogger(logger.LogLevelDebug)
+	cli.Execute(sversion)
-
-	err = daemon.Start(cnf, flogger)
-	if err != nil {
-		log.Fatal(err)
-	}
 }

pkg/cli/cli.go

@@ -0,0 +1,48 @@
+package cli
+
+import (
+	"fmt"
+	"io"
+	"text/tabwriter"
+
+	"github.com/volker-raschek/flucky/pkg/config"
+)
+
+// PrintSensors displays a list with all configured sensors
+func PrintSensors(cnf *config.Config, w io.Writer) error {
+
+	// declar tabwriter
+	tw := tabwriter.NewWriter(w, 0, 0, 3, ' ', 0)
+
+	fmt.Fprint(tw, "name\tlocation\ttype\twire-id\ti2c-bus\ti2c-address\tgpio\ttick-duration\tenabled\n")
+
+	for _, sensor := range cnf.Sensors {
+		fmt.Fprintf(tw, "%v\t%v\t%v\t", sensor.Name, sensor.Location, sensor.Model)
+
+		if sensor.WireID != nil {
+			fmt.Fprintf(tw, "%v\t", *sensor.WireID)
+		} else {
+			fmt.Fprintf(tw, "\t")
+		}
+
+		if sensor.I2CBus != nil {
+			fmt.Fprintf(tw, "%v\t", *sensor.I2CBus)
+		} else {
+			fmt.Fprintf(tw, "\t")
+		}
+
+		if sensor.I2CAddress != nil {
+			fmt.Fprintf(tw, "%#v\t", *sensor.I2CAddress)
+		} else {
+			fmt.Fprintf(tw, "\t")
+		}
+
+		fmt.Fprintf(tw, "%v\t", sensor.GPIONumber)
+
+		fmt.Fprintf(tw, "%v\t%v\n", sensor.TickDuration, sensor.Enabled)
+	}
+
+	tw.Flush()
+
+	return nil
+}

pkg/config/config.go

@@ -1,6 +1,7 @@
 package config
 
 import (
+	"context"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -9,6 +10,7 @@ import (
 	"time"
 
 	"github.com/volker-raschek/flucky/pkg/internal/format"
+	"github.com/volker-raschek/flucky/pkg/storage"
 
 	uuid "github.com/satori/go.uuid"
 	"github.com/volker-raschek/flucky/pkg/types"
@@ -154,21 +156,56 @@ func (cnf *Config) GetSensorByID(id string) *types.Sensor {
 	return nil
 }
 
-// RemoveSensor deletes a sensor by its name or its unique UUID
+// RemoveSensor deletes a sensor by its name or its unique UUID, If definitive
-func (cnf *Config) RemoveSensor(name string) error {
+// is set to true, the sensor will not only be removed in the configuration file
+// but also in the backend.
+func (cnf *Config) RemoveSensor(name string, definitive bool) error {
+
+	backend, err := storage.New(cnf.StorageEndpoint, nil)
+	if err != nil {
+		return err
+	}
+
 	for i, sensor := range cnf.Sensors {
 		// remove machted name
 		if !validUUID.MatchString(name) &&
 			sensor.Name == name {
 			cnf.Sensors = append(cnf.Sensors[:i], cnf.Sensors[i+1:]...)
+
+			if definitive {
+				err = backend.RemoveSensorByName(context.Background(), name)
+				if err != nil {
+					return err
+				}
+			}
+
 			return nil
 		}
 		// remove machted uuid
 		if validUUID.MatchString(name) &&
 			sensor.ID == name {
 			cnf.Sensors = append(cnf.Sensors[:i], cnf.Sensors[i+1:]...)
+
+			if definitive {
+				err = backend.RemoveSensorByID(context.Background(), name)
+				if err != nil {
+					return err
+				}
+			}
+
 			return nil
 		}
 	}
 	return fmt.Errorf("Can not find sensor %v", name)
 }
+
+// RenameSensor renamed a sensor
+func (cnf *Config) RenameSensor(oldName string, newName string) error {
+	for _, cnfSensor := range cnf.Sensors {
+		if cnfSensor.Name == oldName {
+			cnfSensor.Name = newName
+			return nil
+		}
+	}
+	return fmt.Errorf("No sensor %v found", oldName)
+}

pkg/config/io.go

@@ -45,7 +45,7 @@ func Read(configFile string) (*Config, error) {
 func Write(cnf *Config, configFile string) error {
 	if _, err := os.Stat(configFile); os.IsNotExist(err) {
 		configDir := filepath.Dir(configFile)
-		err := os.MkdirAll(configDir, os.ModeDir)
+		err := os.MkdirAll(configDir, 0775)
 		if err != nil {
 			return fmt.Errorf("Failed to create config directory %v: %v", configDir, err)
 		}

pkg/storage/postgres/removeSensorByID.sql

@@ -0,0 +1,2 @@
+DELETE FROM sensors
+WHERE sensor_id = $1;

pkg/storage/postgres/removeSensorByName.sql

@@ -0,0 +1,2 @@
+DELETE FROM sensors
+WHERE sensor_name = $1;

pkg/storage/storage.go

@@ -17,6 +17,8 @@ type Storage interface {
 	InsertDevice(ctx context.Context, device *types.Device) error
 	InsertMeasuredValues(ctx context.Context, measuredValues []*types.MeasuredValue) error
 	InsertSensor(ctx context.Context, sensor *types.Sensor) error
+	RemoveSensorByID(ctx context.Context, sensorID string) error
+	RemoveSensorByName(ctx context.Context, sensorName string) error
 	SelectDevice(ctx context.Context, id string) (*types.Device, error)
 	SelectSensor(ctx context.Context, id string) (*types.Sensor, error)
 }
@@ -154,6 +156,64 @@ func (postgres *Postgres) InsertSensor(ctx context.Context, sensor *types.Sensor
 	return tx.Commit()
 }
 
+// RemoveSensorByID from the database
+func (postgres *Postgres) RemoveSensorByID(ctx context.Context, sensorID string) error {
+	asset := filepath.Join(postgresAssetPath, "removeSensorByID.sql")
+	queryBytes, err := Asset(asset)
+	if err != nil {
+		return fmt.Errorf("Failed to load asset %v: %v", asset, err)
+	}
+	query := string(queryBytes)
+
+	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
+	if err != nil {
+		return fmt.Errorf("Failed to begin new transaction: %v", err)
+	}
+
+	stmt, err := tx.Prepare(query)
+	if err != nil {
+		return fmt.Errorf("Failed to prepare statement: %v", err)
+	}
+	defer stmt.Close()
+
+	_, err = stmt.Exec(sensorID)
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+
+	return tx.Commit()
+}
+
+// RemoveSensorByName from the database
+func (postgres *Postgres) RemoveSensorByName(ctx context.Context, sensorID string) error {
+	asset := filepath.Join(postgresAssetPath, "removeSensorByName.sql")
+	queryBytes, err := Asset(asset)
+	if err != nil {
+		return fmt.Errorf("Failed to load asset %v: %v", asset, err)
+	}
+	query := string(queryBytes)
+
+	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
+	if err != nil {
+		return fmt.Errorf("Failed to begin new transaction: %v", err)
+	}
+
+	stmt, err := tx.Prepare(query)
+	if err != nil {
+		return fmt.Errorf("Failed to prepare statement: %v", err)
+	}
+	defer stmt.Close()
+
+	_, err = stmt.Exec(sensorID)
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+
+	return tx.Commit()
+}
+
 // SelectDevice from database
 func (postgres *Postgres) SelectDevice(ctx context.Context, id string) (*types.Device, error) {
 	asset := filepath.Join(postgresAssetPath, "selectDeviceByID.sql")