itd/cmd/itctl/cmd/time.go

/*
 *	itd uses bluetooth low energy to communicate with InfiniTime devices
 *	Copyright (C) 2021 Arsen Musayelyan
 *
 *	This program is free software: you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation, either version 3 of the License, or
 *	(at your option) any later version.
 *
 *	This program is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package cmd

import (
	"bufio"
	"encoding/json"
	"net"

	"github.com/rs/zerolog/log"
	"github.com/spf13/cobra"
	"go.arsenm.dev/itd/internal/types"
)

// timeCmd represents the time command
var timeCmd = &cobra.Command{
	Use:   `time <ISO8601|"now">`,
	Short: "Set InfiniTime's clock to specified time",
	Run: func(cmd *cobra.Command, args []string) {
		// Ensure required arguments
		if len(args) != 1 {
			cmd.Usage()
			log.Warn().Msg("Command time requires one argument")
			return
		}
		
		// Connect to itd UNIX socket
		conn, err := net.Dial("unix", SockPath)
		if err != nil {
			log.Fatal().Err(err).Msg("Error dialing socket. Is itd running?")
		}
		defer conn.Close()

		// Encode request into connection
		err = json.NewEncoder(conn).Encode(types.Request{
			Type: ReqTypeSetTime,
			Data: args[0],
		})
		if err != nil {
			log.Fatal().Err(err).Msg("Error making request")
		}

		// Read one line from connetion
		line, _, err := bufio.NewReader(conn).ReadLine()
		if err != nil {
			log.Fatal().Err(err).Msg("Error reading line from connection")
		}

		var res types.Response
		// Decode line into response
		err = json.Unmarshal(line, &res)
		if err != nil {
			log.Fatal().Err(err).Msg("Error decoding JSON data")
		}

		if res.Error {
			log.Fatal().Msg(res.Message)
		}
	},
}

func init() {
	setCmd.AddCommand(timeCmd)
}