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player.go
177 lines (151 loc) · 3.56 KB
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player.go
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package disgo
import (
"fmt"
"runtime/debug"
"sync"
"github.com/bwmarrin/discordgo"
)
type (
Player struct {
DiscordSession *discordgo.Session
Sessions map[string]*Session
sessionsMutex sync.Mutex
EventManager *EventManager
YoutubeClient *YoutubeClient
}
)
func (p *Player) Init() {
p.Sessions = make(map[string]*Session)
p.YoutubeClient = &YoutubeClient{}
p.EventManager = NewEventManager()
// Add discord handler to disconnect from voice channel when bot is kicked
p.DiscordSession.AddHandler(func(s *discordgo.Session, e *discordgo.VoiceStateUpdate) {
// Delete session if bot is kicked from voice channel
if e.UserID == s.State.User.ID && e.ChannelID == "" {
p.deleteSession(e.GuildID, e.ChannelID)
}
// ===============================================
// Delete session if bot is alone in voice channel
guild, err := s.State.Guild(e.GuildID)
if err != nil {
return
}
var voiceChannel *discordgo.Channel
for _, channel := range guild.VoiceStates {
if channel.UserID == s.State.User.ID {
voiceChannel, _ = s.State.Channel(channel.ChannelID)
break
}
}
if voiceChannel == nil {
return
}
alone := true
for _, channel := range guild.VoiceStates {
if channel.ChannelID == voiceChannel.ID && channel.UserID != s.State.User.ID {
alone = false
break
}
}
if alone {
p.deleteSession(e.GuildID, e.ChannelID)
}
})
}
func (p *Player) Play(guildID string, chanID string, query string) (songs []Song, err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("%s\n%s", r.(error), debug.Stack())
}
}()
// Search for videos
ytSongs, err := p.YoutubeClient.Search(query)
if err != nil {
return nil, err
}
if len(ytSongs) == 0 {
return nil, nil
}
// Look for an active session
session, err := p.getSession(guildID, chanID)
if err != nil {
return nil, err
}
queue := session.Queue
// Add videos to queue
for _, ytSong := range ytSongs {
queue.AddSong(&ytSong)
}
session.Play()
// Convert []Video to []Song
songs = make([]Song, len(ytSongs))
for i, v := range ytSongs {
songs[i] = &v
}
return songs, nil
}
func (p *Player) Pause(guildID string) {
session := p.Sessions[guildID]
if session == nil {
return
}
session.Pause()
}
func (p *Player) Resume(guildID string) {
session := p.Sessions[guildID]
if session == nil {
return
}
session.Resume()
}
func (p *Player) Stop(guildID string) {
session := p.Sessions[guildID]
if session == nil {
return
}
session.Stop()
}
func (p *Player) Next(guildID string) {
session := p.Sessions[guildID]
if session == nil {
return
}
session.Next()
}
func (p *Player) On(eventName string, handler EventHandler) {
p.EventManager.Register(eventName, handler)
}
func (p *Player) GetQueue(guildID string) *Queue {
session := p.Sessions[guildID]
if session == nil {
return nil
}
return session.Queue
}
// ==========================
// Utils to manage sessions
// ==========================
func (p *Player) getSession(guildID string, chanID string) (*Session, error) {
p.sessionsMutex.Lock()
defer p.sessionsMutex.Unlock()
session := p.Sessions[guildID]
if session == nil || !session.IsActive {
var err error
session, err = NewSession(guildID, chanID, p.DiscordSession, p.EventManager)
if err != nil {
return nil, err
}
p.Sessions[guildID] = session
}
return session, nil
}
func (p *Player) deleteSession(guildID string, chanID string) {
p.sessionsMutex.Lock()
defer p.sessionsMutex.Unlock()
session := p.Sessions[guildID]
if session == nil {
return
}
session.stop()
delete(p.Sessions, guildID)
}