使用 Golang 打造 Discord 機器人 (二)

在本地將機器人上線

Golang 版本: 1.17.5

使用套件: https://github.com/bwmarrin/discordgo

建立資料夾 discordbot，並使用編輯器開啟
在終端機輸入指令來建立 go.mod
```
go mod init disocrdbot
```
建立 .exv 檔案，輸入上一章節取得的機器人 token
```
DCToken=你的機器人token
```

建立 main.go

package main
import (
 "fmt"
 "os"
 "os/signal"
 "syscall"

 "github.com/bwmarrin/discordgo"
 _ "github.com/joho/godotenv/autoload"
)
func main() {
 token := os.Getenv("DCToken")

 // creates a new Discord session
 dg, err := discordgo.New("Bot " + token)
 if err != nil {
     fmt.Println("error creating Discord session,", err)
     return
 }

 // Register the messageCreate func as a callback for MessageCreate events.
 dg.AddHandler(messageCreate)

 // 只監聽訊息
 dg.Identify.Intents = discordgo.IntentsGuildMessages

 // 開啟連線
 err = dg.Open()
 if err != nil {
     fmt.Println("error opening connection,", err)
     return
 }

 // Wait here until CTRL-C or other term signal is received.
 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

 // Cleanly close down the Discord session.
 dg.Close()
}
func messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {
 // Ignore all messages created by the bot itself
 // This isn't required in this specific example but it's a good practice.
 if m.Author.ID == s.State.User.ID {
     return
 }
 // If the message is "ping" reply with "Pong!"
 if m.Content == "ping" {
     s.ChannelMessageSend(m.ChannelID, "Pong!")
 }

 // If the message is "pong" reply with "Ping!"
 if m.Content == "pong" {
     s.ChannelMessageSend(m.ChannelID, "Ping!")
 }
}