main.go

package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"os"
	"os/signal"
	"syscall"

	"github.com/bwmarrin/discordgo"
)

// Configuration for bot
type Configuration struct {
	Token   string
	GuildID string
	AppID   string
}

var (
	config     = Configuration{}
	configfile string
)

func init() {

	flag.StringVar(&configfile, "c", "", "Configuration file location")
	flag.Parse()

	if configfile == "" {
		fmt.Println("No config file entered")
		os.Exit(1)
	}

	if _, err := os.Stat(configfile); os.IsNotExist(err) {
		fmt.Println("Configfile does not exist, you should make one")
		os.Exit(2)
	}

	fileh, _ := os.Open(configfile)
	decoder := json.NewDecoder(fileh)
	err := decoder.Decode(&config)
	if err != nil {
		fmt.Println("error: ", err)
		os.Exit(3)
	}
}

func main() {

	// Create a new Discord session using the provided bot token.
	dg, err := discordgo.New("Bot " + config.Token)
	if err != nil {
		fmt.Println("error creating Discord session,", err)
		return
	}

	err = dg.Open()
	if err != nil {
		fmt.Println("error opening connection", err)
		return
	}
	defer dg.Close()

	fmt.Println("Bot is now running. Press CTRL-C to exit.")
	sc := make(chan os.Signal, 1)

	signal.Notify(sc, syscall.SIGINT, syscall.SIGTERM, os.Interrupt)
	<-sc
}