implement basic whitelist add and remove functionality

app/bot.go

@@ -0,0 +1,81 @@
+package app
+
+import (
+	"flag"
+	"log"
+	"os"
+	"os/signal"
+
+	"github.com/bwmarrin/discordgo"
+	"github.com/gorcon/rcon"
+)
+
+var s *discordgo.Session
+var config Config
+var dbPath string
+var db MemberUsernameMap
+var conn *rcon.Conn
+
+func Run() {
+	// parse CLI options and get config
+	configPath := *(flag.String("config", "config.json", "path to config.json file"))
+	dbPath = *(flag.String("db", "db.json", "path to db.json file"))
+	flag.Parse()
+
+	// load config
+	config, err := GetConfig(configPath)
+	if err != nil {
+		log.Fatalf("Error when reading config file: %s", err)
+	}
+
+	// load db or create new empty db
+	db, err = LoadDB(dbPath)
+	if err != nil {
+		log.Fatalf("Error when reading config file: %s", err)
+	}
+
+	// open rconn connection
+	conn, err = rcon.Dial(config.RCON, config.Password)
+	if err != nil {
+		log.Fatalf("Failed to open rcon connection: %s", err.Error())
+	}
+
+	// create new session
+	s, err := discordgo.New("Bot " + config.Token)
+	if err != nil {
+		log.Fatalf("Invalid bot parameters: %v", err)
+	}
+
+	// attach slash command listener
+	s.AddHandler(func(s *discordgo.Session, i *discordgo.InteractionCreate) {
+		if h, ok := commandHandlers[i.ApplicationCommandData().Name]; ok {
+			h(s, i)
+		}
+	})
+
+	// attach session connected listener
+	s.AddHandler(func(s *discordgo.Session, r *discordgo.Ready) {
+		log.Printf("Logged in as: %v#%v", s.State.User.Username, s.State.User.Discriminator)
+	})
+
+	// overwrite registered commands
+	log.Println("Bulk overwriting commands")
+	_, err = s.ApplicationCommandBulkOverwrite(config.AppID, config.GuildID, commands)
+	if err != nil {
+		log.Fatalf("Failed to bulk overwrite commands: %s", err.Error())
+	}
+
+	// open session
+	err = s.Open()
+	if err != nil {
+		log.Fatalf("Cannot open the session: %v", err)
+	}
+
+	defer s.Close()
+	defer conn.Close()
+
+	stop := make(chan os.Signal, 1)
+	signal.Notify(stop, os.Interrupt)
+	log.Println("Press Ctrl+C to exit")
+	<-stop
+}