Add Ping, Debug and Animal commands

app/app.go

@@ -0,0 +1,92 @@
+package app
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+type Config struct {
+	Token  string
+	Prefix string
+}
+
+type App struct {
+	Config   Config
+	Commands map[string]func(h *Handler, args []string)
+}
+
+type Handler struct {
+	Session *discordgo.Session
+	Message *discordgo.MessageCreate
+}
+
+func NewApp(config Config) *App {
+	return &App{
+		Config:   config,
+		Commands: make(map[string]func(h *Handler, args []string)),
+	}
+}
+
+func (a *App) RegisterCommand(cmd string, f func(h *Handler, args []string)) {
+	a.Commands[cmd] = f
+}
+
+func (a *App) Run() {
+	dg, err := discordgo.New("Bot " + a.Config.Token)
+	if err != nil {
+		fmt.Println("error creating Discord session,", err)
+
+		return
+	}
+
+	dg.AddHandler(func(session *discordgo.Session, message *discordgo.MessageCreate) {
+		h := &Handler{
+			Session: session,
+			Message: message,
+		}
+
+		if h.Message.Author.ID == h.Session.State.User.ID {
+			return
+		}
+
+		if h.Message.Author.Bot {
+			return
+		}
+
+		var command string
+		var args string
+
+		command = h.Message.Content
+		command = strings.TrimSpace(command)
+		command = strings.TrimPrefix(command, a.Config.Prefix)
+		command, args, _ = strings.Cut(command, " ")
+
+		callback, ok := a.Commands[command]
+		if !ok {
+			return
+		}
+
+		callback(h, strings.Split(args, " "))
+	})
+
+	dg.Identify.Intents = discordgo.IntentsGuildMessages
+
+	err = dg.Open()
+	if err != nil {
+		fmt.Println("error opening connection,", err)
+
+		return
+	}
+
+	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
+
+	dg.Close()
+}