talk in audio channel (not working yet)

core/audio.go

@@ -0,0 +1,53 @@
+package core
+
+import (
+	"fmt"
+	"log"
+	"os/exec"
+	"time"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+// playSound plays the current buffer to the provided channel.
+func playSound(s *discordgo.Session, guildID, channelID string, buffer []byte) (err error) {
+
+	// Join the provided voice channel.
+	vc, err := s.ChannelVoiceJoin(guildID, channelID, false, true)
+	if err != nil {
+		log.Println("Could not find channel.")
+		return err
+	}
+
+	// Sleep for a specified amount of time before playing the sound
+	time.Sleep(250 * time.Millisecond)
+
+	// Start speaking.
+	vc.Speaking(true)
+
+	vc.OpusSend <- buffer
+
+	// Stop speaking
+	vc.Speaking(false)
+
+	// Sleep for a specificed amount of time before ending.
+	time.Sleep(250 * time.Millisecond)
+
+	// Disconnect from the provided voice channel.
+	vc.Disconnect()
+	
+	return nil
+}
+
+func getAudioMessage(msg string) (filename string, out []byte) {
+	curr_time := time.Now().Unix()
+	filename = fmt.Sprintf("%d.ogg", curr_time)
+	var cmd_args string = fmt.Sprintf("espeak-ng -s 120 -v mb-fr2 -p 30 '%s' --stdout | ffmpeg -i - -c:a libopus -f ogg pipe:1 2>/dev/null",
+		maxString(msg, 300))
+	cmd := exec.Command("sh", "-c", cmd_args)
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		fmt.Println(fmt.Sprint(err))
+	}
+	return
+}

core/commands.go

@@ -41,6 +41,12 @@ func CommandInit() {
 		"`/ggd [audio|tts] hello everyone`",
 		MessageAudio)
 
+	SetCommand(
+		[]string{"/ggd voca"},
+		"Play audio message in vocal channel",
+		"`/ggd voca let's go shopping`",
+		MessageVocal)
+
 	SetCommand(
 		[]string{"ping", "pong"},
 		"*Check if the bot is alive*",

core/messages.go

@@ -3,7 +3,7 @@ package core
 import (
 	"bytes"
 	"fmt"
-	"os/exec"
+	"log"
 	"math/rand"
 	"sort"
 	"strings"
@@ -12,18 +12,20 @@ import (
 	"github.com/bwmarrin/discordgo"
 )
 
-func getAudioMessage(msg string) (filename string, file *bytes.Reader) {
-	curr_time := time.Now().Unix()
-	filename = fmt.Sprintf("/tmp/%d.mp3", curr_time)
-	var cmd_args string = fmt.Sprintf("espeak-ng -s 120 -v mb-fr2 -p 30 '%s' --stdout",
-		maxString(msg, 300))
-	cmd := exec.Command("sh", "-c", cmd_args)
-	out, err := cmd.CombinedOutput()
-	if err != nil {
-		fmt.Println(fmt.Sprint(err))
+// This function will be called (due to AddHandler above) every time a new
+// guild is joined.
+func GuildCreate(s *discordgo.Session, event *discordgo.GuildCreate) {
+
+	if event.Guild.Unavailable {
+		return
+	}
+
+	for _, channel := range event.Guild.Channels {
+		if channel.ID == event.Guild.ID {
+			_, _ = s.ChannelMessageSend(channel.ID, "Airhorn is ready! Type !airhorn while in a voice channel to play a sound.")
+			return
+		}
 	}
-	file = bytes.NewReader(out)
-	return
 }
 
 func getHelpMessage() string {
@@ -113,6 +115,45 @@ func MessagePing(s *discordgo.Session, m *discordgo.MessageCreate, message strin
 
 func MessageAudio(s *discordgo.Session, m *discordgo.MessageCreate, message string) {
 	var cleanMessage string = prepareTTSMessage(message)
-	filename, file := getAudioMessage(cleanMessage)
+	filename, out := getAudioMessage(cleanMessage)
+	file := bytes.NewReader(out)
 	s.ChannelFileSend(m.ChannelID, filename, file)
 }
+
+func MessageVocal(s *discordgo.Session, m *discordgo.MessageCreate, message string) {
+	log.Println("We get there (MessageVocal)")
+	// 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
+	}
+
+	// Find the channel that the message came from.
+	c, err := s.State.Channel(m.ChannelID)
+	if err != nil {
+		// Could not find channel.
+		return
+	}
+	
+	// Find the guild for that channel.
+	g, err := s.State.Guild(c.GuildID)
+	if err != nil {
+		// Could not find guild.
+		return
+	}
+
+	var cleanMessage string = prepareTTSMessage(message)
+	_, out := getAudioMessage(cleanMessage)
+
+	// Look for the message sender in that guild's current voice states.
+	for _, vs := range g.VoiceStates {
+		if vs.UserID == m.Author.ID {
+			log.Println("We get there (MessageVocal) voice state for loop")
+			err = playSound(s, g.ID, vs.ChannelID, out)
+			if err != nil {
+				fmt.Println("Error playing sound:", err)
+			}	
+			return
+		}
+	}
+}