add /start and /ping commands

commands/command.go

@@ -0,0 +1,8 @@
+package commands
+
+type Command string
+
+const (
+	Start = Command("/start")
+	Ping  = Command("/ping")
+)

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"errors"
+	"git.user-penguin.space/vladimir/all_tg_bot/commands"
 	tgbot "github.com/go-telegram-bot-api/telegram-bot-api"
 	"github.com/umputun/go-flags"
 	"log"
@@ -16,6 +17,7 @@ const (
 
 type Opts struct {
 	Token string `short:"t" long:"token" description:"Telegram api token"`
+	Name  string `short:"n" long:"name" description:"Telegram bot name" default:"@butler_tg_bot"`
 }
 
 var opts Opts
@@ -59,5 +61,13 @@ func run() {
 		if strings.Contains(strings.ToLower(text), tag) {
 			_, _ = bot.Send(tgbot.NewMessage(chatID, allUsers))
 		}
+
+		command := commands.Command(strings.Replace(text, opts.Name, "", 1))
+		switch command {
+		case commands.Start:
+			_, _ = bot.Send(tgbot.NewMessage(chatID, "Здравствуйте, я ваш дворецкий."))
+		case commands.Ping:
+			_, _ = bot.Send(tgbot.NewMessage(chatID, "pong"))
+		}
 	}
 }