Created initial discord bot that announces when someone joins a voice chat.

go.mod

@@ -0,0 +1,11 @@
+module dev.justinjudd.com/discord_bots
+
+go 1.24.1
+
+require (
+	github.com/bwmarrin/discordgo v0.29.0 // indirect
+	github.com/gorilla/websocket v1.4.2 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+	golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b // indirect
+	golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 // indirect
+)

go.sum

@@ -0,0 +1,14 @@
+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=

voice_announce/main.go

@@ -0,0 +1,98 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"math/rand/v2"
+	"os"
+	"os/signal"
+	"strconv"
+	"time"
+
+	"github.com/bwmarrin/discordgo"
+	"github.com/joho/godotenv"
+)
+
+var botToken string
+var announceChannelName string
+var cleanDelay = 30
+
+var joinMessages = []string{
+	"<@%s> has joined <#%s>",
+	"<@%s> has joined <#%s>; Join in for some nerd talk",
+	"<#%[2]s> is the place to be, <@%[1]s> just joined",
+	"<#%[2]s> just go a bit cooler, <@%[1]s> is now in",
+	"<@%s> is hanging out in <#%s>",
+}
+
+func main() {
+	envs, err := godotenv.Read()
+	if err != nil {
+		log.Fatalf("Unable to get environment variables: %v", err)
+	}
+
+	// set values from env
+	botToken = envs["BOT_TOKEN"]
+	announceChannelName = envs["ANNOUNCE_CHANNEL"]
+	if delay, ok := envs["CLEAN_DELAY"]; ok {
+		if d2, err := strconv.Atoi(delay); err == nil {
+			cleanDelay = d2
+		}
+	}
+
+	s, err := discordgo.New("Bot " + botToken)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	s.AddHandler(func(s *discordgo.Session, r *discordgo.Ready) {
+		for _, g := range r.Guilds {
+			g2, _ := s.Guild(g.ID)
+			log.Printf("Bot is connected to %q.", g2.Name)
+		}
+	})
+	s.AddHandler(voiceStatus)
+
+	err = s.Open()
+	if err != nil {
+		log.Fatalf("Cannot open the session: %v", err)
+	}
+	defer s.Close()
+
+	stop := make(chan os.Signal, 1)
+	signal.Notify(stop, os.Interrupt)
+	<-stop
+}
+
+// Handle for when someone joins a voice channel - send notification about them joining.
+func voiceStatus(s *discordgo.Session, m *discordgo.VoiceStateUpdate) {
+	if m.BeforeUpdate != nil || m.VoiceState == nil {
+		return
+	}
+	channels, err := s.GuildChannels(m.VoiceState.GuildID)
+	if err != nil {
+		log.Printf("Unable to get channels for Guild: %s", m.VoiceState.GuildID)
+		return
+	}
+	var announceChannel *discordgo.Channel
+	for _, c := range channels {
+		if c.Name == announceChannelName {
+			announceChannel = c
+		}
+	}
+	if announceChannel == nil {
+		log.Printf("Unable to get announce channel for Guild: %s", m.VoiceState.GuildID)
+		return
+	}
+	msg := joinMessages[rand.IntN(len(joinMessages))]
+
+	sent, err := s.ChannelMessageSend(announceChannel.ID, fmt.Sprintf(msg, m.VoiceState.UserID, m.VoiceState.ChannelID))
+	g, _ := s.Guild(m.VoiceState.GuildID)
+	log.Default().Printf("%q has joined %q in %s", m.VoiceState.Member.DisplayName(), m.VoiceState.ChannelID, g.Name)
+	if err != nil {
+		log.Printf("unable to send message: %s", err)
+	}
+	time.AfterFunc(time.Second*time.Duration(cleanDelay), func() {
+		s.ChannelMessageDelete(sent.ChannelID, sent.ID)
+	})
+}