public-ip-tracker/tracker/main.go

package main

import (
	"context"
	"flag"
	"fmt"
	"os"
	"os/signal"

	"git.faercol.me/faercol/public-ip-tracker/tracker/bot"
	"git.faercol.me/faercol/public-ip-tracker/tracker/config"
)

type cliArgs struct {
	configPath string
}

func parseArgs() *cliArgs {
	configPath := flag.String("config", "", "Path to the JSON configuration file")

	flag.Parse()

	return &cliArgs{
		configPath: *configPath,
	}
}

func main() {
	fmt.Println("Parsing arguments")
	args := parseArgs()

	mainCtx, cancel := context.WithCancel(context.Background())

	fmt.Println("Parsing config")
	conf, err := config.New(args.configPath)
	if err != nil {
		panic(err)
	}

	fmt.Println("Initializing bot")
	notifBot := bot.New(mainCtx, conf)
	if err := notifBot.SendInitMessage(); err != nil {
		panic(err)
	}

	fmt.Println("Starting monitoring")
	go notifBot.Run()

	c := make(chan os.Signal, 1)
	signal.Notify(c, os.Interrupt)

outerloop:
	for {
		select {
		case <-c:
			fmt.Println("received cancel")
			cancel()
			break outerloop
		case err := <-notifBot.ErrChan():
			fmt.Printf("Unexpected error %s", err.Error())
		case <-notifBot.Exit():
			fmt.Println("Unexpected exit")
		}
	}

	<-notifBot.Exit()

	fmt.Println("OK")
	os.Exit(0)
}