Add device delete (#22)

This PR introduces the command to delete a device from arduino iot cloud
Thus, now devices can be created, deleted and listed
To delete a device, a device id should be specified
$ iot-cloud-cli device delete -i <DEVICE_ID>

* Add device delete command

* Update readme

Author: polldo

README.md

@@ -35,5 +35,8 @@ Use this command to provision a device:
 
 ## Device commands
 
+Once a device has been created thorugh the provisioning procedure, it can be deleted by using the following command:
+`$ iot-cloud-cli device delete --id <deviceID>`
+
 Devices currently present on Arduino IoT Cloud can be retrieved by using this command:
 `$ iot-cloud-cli device list`

cli/device/delete.go

@@ -0,0 +1,36 @@
+package device
+
+import (
+	"fmt"
+
+	"github.com/arduino/iot-cloud-cli/command/device"
+	"github.com/spf13/cobra"
+)
+
+var deleteFlags struct {
+	id string
+}
+
+func initDeleteCommand() *cobra.Command {
+	deleteCommand := &cobra.Command{
+		Use:   "delete",
+		Short: "Delete a device",
+		Long:  "Delete a device from Arduino IoT Cloud",
+		RunE:  runDeleteCommand,
+	}
+	deleteCommand.Flags().StringVarP(&deleteFlags.id, "id", "i", "", "Device ID")
+	deleteCommand.MarkFlagRequired("id")
+	return deleteCommand
+}
+
+func runDeleteCommand(cmd *cobra.Command, args []string) error {
+	fmt.Printf("Deleting device %s\n", deleteFlags.id)
+
+	params := &device.DeleteParams{ID: deleteFlags.id}
+	err := device.Delete(params)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

cli/device/device.go

@@ -13,6 +13,7 @@ func NewCommand() *cobra.Command {
 
 	deviceCommand.AddCommand(initCreateCommand())
 	deviceCommand.AddCommand(initListCommand())
+	deviceCommand.AddCommand(initDeleteCommand())
 
 	return deviceCommand
 }

command/device/delete.go

@@ -0,0 +1,27 @@
+package device
+
+import (
+	"github.com/arduino/iot-cloud-cli/internal/config"
+	"github.com/arduino/iot-cloud-cli/internal/iot"
+)
+
+// DeleteParams contains the parameters needed to
+// delete a device from Arduino IoT Cloud.
+type DeleteParams struct {
+	ID string
+}
+
+// Delete command is used to delete a device
+// from Arduino IoT Cloud.
+func Delete(params *DeleteParams) error {
+	conf, err := config.Retrieve()
+	if err != nil {
+		return err
+	}
+	iotClient, err := iot.NewClient(conf.Client, conf.Secret)
+	if err != nil {
+		return err
+	}
+
+	return iotClient.DeleteDevice(params.ID)
+}

internal/iot/client.go

@@ -10,6 +10,7 @@ import (
 // Client can be used to perform actions on the arduino iot cloud.
 type Client interface {
 	AddDevice(fqbn, name, serial, devType string) (string, error)
+	DeleteDevice(id string) error
 	ListDevices() ([]iotclient.ArduinoDevicev2, error)
 	AddCertificate(id, csr string) (*iotclient.ArduinoCompressedv2, error)
 }
@@ -48,6 +49,17 @@ func (cl *client) AddDevice(fqbn, name, serial, dType string) (string, error) {
 	return dev.Id, nil
 }
 
+// DeleteDevice deletes the device corresponding to the passed ID
+// from Arduino IoT Cloud.
+func (cl *client) DeleteDevice(id string) error {
+	_, err := cl.api.DevicesV2Api.DevicesV2Delete(cl.ctx, id)
+	if err != nil {
+		err = fmt.Errorf("deleting device: %w", err)
+		return err
+	}
+	return nil
+}
+
 // ListDevices retrieves and returns a list of all Arduino IoT Cloud devices
 // belonging to the user performing the request.
 func (cl *client) ListDevices() ([]iotclient.ArduinoDevicev2, error) {