Bot setup

.gitignore

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+.env

Bot/Untis.go

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+package Untis
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"strings"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+var BotToken string
+
+func checkNilErr(e error) {
+	if e != nil {
+		log.Fatal("Error message")
+	}
+}
+
+func Run() {
+
+	// create a session
+	discord, err := discordgo.New("Bot " + BotToken)
+	checkNilErr(err)
+
+	// set intents to receive message events in guilds and DMs
+	discord.Identify.Intents = discordgo.IntentsGuildMessages | discordgo.IntentsDirectMessages
+
+	// add a event handler
+	discord.AddHandler(newMessage)
+
+	// open session
+	discord.Open()
+	defer discord.Close() // close session, after function termination
+
+	// keep bot running untill there is NO os interruption (ctrl + C)
+	fmt.Println("Bot running....")
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt)
+	<-c
+
+}
+
+func newMessage(discord *discordgo.Session, message *discordgo.MessageCreate) {
+	fmt.Printf(message.Content)
+	/* prevent bot responding to its own message
+	this is achived by looking into the message author id
+	if message.author.id is same as bot.author.id then just return
+	*/
+	if message.Author.ID == discord.State.User.ID {
+		return
+	}
+
+	// respond to user message if it contains `!help` or `!bye`
+	switch {
+	case strings.Contains(message.Content, "!untis"):
+		discord.ChannelMessageSend(message.ChannelID, "Hello World😃")
+	case strings.Contains(message.Content, "!bye"):
+		discord.ChannelMessageSend(message.ChannelID, "Good Bye👋")
+		// add more cases if required
+	}
+
+}

README.md

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+# Discord bot for logging Untis timetable

go.mod

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+module untislogger
+
+go 1.24.4
+
+require (
+	github.com/bwmarrin/discordgo v0.29.0
+	github.com/joho/godotenv v1.5.1
+)
+
+require (
+	github.com/gorilla/websocket v1.4.2 // indirect
+	golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b // indirect
+	golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 // indirect
+)

go.sum

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+github.com/bwmarrin/discordgo v0.29.0 h1:FmWeXFaKUwrcL3Cx65c20bTRW+vOb6k8AnaP+EgjDno=
+github.com/bwmarrin/discordgo v0.29.0/go.mod h1:NJZpH+1AfhIcyQsPeuBKsUtYrRnjkyu0kIVMCHkZtRY=
+github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b h1:7mWr3k41Qtv8XlltBkDkl8LoP3mpSgBW8BUoxtEdbXg=
+golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 h1:nxC68pudNYkKU6jWhgrqdreuFiOQWj1Fs7T3VrH4Pjw=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

main.go

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+package main
+
+import (
+	"os"
+	Untis "untislogger/Bot"
+
+	"github.com/joho/godotenv"
+)
+
+func main() {
+	godotenv.Load()
+	Untis.BotToken = os.Getenv("DISCORD_TOKEN")
+	Untis.Run() // call the run function of Bot/Untis.go
+}