Initial Commit

cmd/itctl/cmd/heart.go

@@ -0,0 +1,76 @@
+/*
+ *	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"
+	"fmt"
+	"net"
+
+	"github.com/rs/zerolog/log"
+	"github.com/spf13/cobra"
+	"go.arsenm.dev/itd/internal/types"
+)
+
+// heartCmd represents the heart command
+var heartCmd = &cobra.Command{
+	Use:   "heart",
+	Short: "Get heart rate from InfiniTime",
+	Run: func(cmd *cobra.Command, args []string) {
+		// 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: ReqTypeHeartRate,
+		})
+		if err != nil {
+			log.Fatal().Err(err).Msg("Error making request")
+		}
+
+		// Read one line from connection
+		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)
+		}
+
+		// Print returned BPM
+		fmt.Printf("%d BPM\n", int(res.Value.(float64)))
+	},
+}
+
+func init() {
+	getCmd.AddCommand(heartCmd)
+}