qmk-rgb/cmd/wobkey/rgb/info.go

package rgb

import (
	"encoding/json"
	"fmt"
	"os"

	"github.com/spf13/cobra"
	"github.com/wobkey/rgb/internal/rgb"
	"github.com/wobkey/rgb/internal/via"
)

func NewInfoCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "info",
		Short: "Show current RGB state",
		Run: func(cmd *cobra.Command, args []string) {
			proto, _, err := OpenDevice()
			if err != nil {
				fmt.Fprintf(os.Stderr, "Error: %v\n", err)
				os.Exit(1)
			}
			defer proto.Close()

			getValue := func(param uint8) (uint8, error) {
				value, err := proto.GetValue(via.RGBLight, param)
				if err != nil {
					return 0, err
				}
				if len(value) == 0 {
					return 0, fmt.Errorf("empty value response")
				}
				return value[0], nil
			}

			brightness, err := getValue(uint8(rgb.Brightness))
			if err != nil {
				fmt.Fprintf(os.Stderr, "Error getting brightness: %v\n", err)
				os.Exit(1)
			}
			speed, err := getValue(uint8(rgb.Speed))
			if err != nil {
				fmt.Fprintf(os.Stderr, "Error getting speed: %v\n", err)
				os.Exit(1)
			}
			mode, err := getValue(uint8(rgb.EffectID))
			if err != nil {
				fmt.Fprintf(os.Stderr, "Error getting mode: %v\n", err)
				os.Exit(1)
			}

			out := struct {
				Enabled    bool   `json:"enabled"`
				Mode       string `json:"mode"`
				Brightness uint8  `json:"brightness"`
				Speed      uint8  `json:"speed"`
			}{
				Enabled:    lightingEnabled(mode, brightness),
				Mode:       rgb.Effect(mode).String(),
				Brightness: brightness,
				Speed:      speed,
			}

			data, _ := json.MarshalIndent(out, "", "  ")
			fmt.Println(string(data))
		},
	}
}