meeting_signal.go

package main

import (
	"fmt"
	"html/template"
	"log"
	"net/http"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
)

type MeetingSignalData struct {
	LightStatus bool
}

func main() {
	cwd, _ := os.Getwd()
	tmpl := template.Must(template.ParseFiles(filepath.Join(cwd, "meeting_signal.html")))

	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		formErr := r.ParseForm()
		if formErr != nil {
			log.Fatal(formErr)
		}

		switchAction := r.FormValue("switch")

		if switchAction == "on" {
			// fmt.Println("Switching light to on!")

			_, onCmdErr := exec.Command("sh", "-c", "sudo ykushcmd ykushxs -u 0").Output()

			if onCmdErr != nil {
				log.Fatal(onCmdErr)
			}
		} else if switchAction == "off" {
			// fmt.Println("Switching light to off!")

			_, offCmdErr := exec.Command("sh", "-c", "sudo ykushcmd ykushxs -d 0").Output()

			if offCmdErr != nil {
				log.Fatal(offCmdErr)
			}
		}

		out, cmdErr := exec.Command("sh", "-c", "sudo ykushcmd ykushxs -g").Output()

		if cmdErr != nil {
			log.Fatal(cmdErr)
		}

		// Convert bytes array to a string
		responseOutput := string(out[:])

		response := strings.TrimSpace(responseOutput)
		status := response == "Downstream port is ON"

		data := MeetingSignalData{
			LightStatus: status,
		}

		tmpl.Execute(w, data)
	})

	fmt.Println("Listening on port 8080")
	http.ListenAndServe(":8080", nil)
}