Add mute command

cmd/kefw2/cmd/mute.go

@@ -0,0 +1,57 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+// muteCmd toggles the mute state of the speakers
+var muteCmd = &cobra.Command{
+	Use:   "mute",
+	Short: "Get or adjust the mute state of the speakers",
+	Long:  `Get or adjust the mute state of the speakers`,
+	Args:  cobra.MaximumNArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		if len(args) != 1 {
+			mute, _ := currentSpeaker.IsMuted()
+			fmt.Printf("Speakers are muted: %t\n", mute)
+			return
+		}
+		mute, err := parseMuteArg(args[0])
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		if mute {
+			err = currentSpeaker.Mute()
+		} else {
+			err = currentSpeaker.Unmute()
+		}
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+	},
+	ValidArgsFunction: MuteCompletion,
+}
+
+func init() {
+	rootCmd.AddCommand(muteCmd)
+}
+
+func MuteCompletion(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+	return []string{"on", "off", "true", "false", "0", "1", "muted", "unmute", "unmuted"}, cobra.ShellCompDirectiveNoFileComp
+}
+
+func parseMuteArg(mute string) (bool, error) {
+	switch mute {
+	case "on", "true", "1", "muted":
+		return true, nil
+	case "off", "false", "0", "unmute", "unmuted":
+		return false, nil
+	default:
+		return false, fmt.Errorf("mute must be one of: on, off, true, false, 0, 1, muted, unmute, unmuted")
+	}
+}