mirror of
https://github.com/Luzifer/twitch-bot.git
synced 2024-11-08 08:10:08 +00:00
324 lines
8 KiB
Go
324 lines
8 KiB
Go
package main
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import (
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"crypto/tls"
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"fmt"
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"strings"
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"sync"
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"github.com/Luzifer/twitch-bot/plugins"
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"github.com/Luzifer/twitch-bot/twitch"
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"github.com/go-irc/irc"
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"github.com/pkg/errors"
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log "github.com/sirupsen/logrus"
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)
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var (
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rawMessageHandlers []plugins.RawMessageHandlerFunc
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rawMessageHandlersLock sync.Mutex
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)
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func notifyRawMessageHandlers(m *irc.Message) error {
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rawMessageHandlersLock.Lock()
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defer rawMessageHandlersLock.Unlock()
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for _, fn := range rawMessageHandlers {
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if err := fn(m); err != nil {
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return errors.Wrap(err, "executing raw message handlers")
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}
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}
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return nil
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}
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func registerRawMessageHandler(fn plugins.RawMessageHandlerFunc) error {
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rawMessageHandlersLock.Lock()
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defer rawMessageHandlersLock.Unlock()
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rawMessageHandlers = append(rawMessageHandlers, fn)
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return nil
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}
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type ircHandler struct {
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conn *tls.Conn
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c *irc.Client
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user string
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}
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func newIRCHandler() (*ircHandler, error) {
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h := new(ircHandler)
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username, err := twitchClient.GetAuthorizedUsername()
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if err != nil {
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return nil, errors.Wrap(err, "fetching username")
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}
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conn, err := tls.Dial("tcp", "irc.chat.twitch.tv:6697", nil)
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if err != nil {
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return nil, errors.Wrap(err, "connect to IRC server")
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}
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h.c = irc.NewClient(conn, irc.ClientConfig{
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Nick: username,
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Pass: strings.Join([]string{"oauth", cfg.TwitchToken}, ":"),
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User: username,
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Name: username,
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Handler: h,
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SendLimit: cfg.IRCRateLimit,
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SendBurst: 0, // Twitch uses a bucket system, we don't have anything to replicate that in this IRC client
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})
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h.conn = conn
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h.user = username
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return h, nil
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}
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func (i ircHandler) Client() *irc.Client { return i.c }
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func (i ircHandler) Close() error { return i.conn.Close() }
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func (i ircHandler) ExecuteJoins(channels []string) {
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for _, ch := range channels {
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i.c.Write(fmt.Sprintf("JOIN #%s", strings.TrimLeft(ch, "#")))
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}
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}
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func (i ircHandler) ExecutePart(channel string) {
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i.c.Write(fmt.Sprintf("PART #%s", strings.TrimLeft(channel, "#")))
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}
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func (i ircHandler) Handle(c *irc.Client, m *irc.Message) {
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go func(m *irc.Message) {
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configLock.RLock()
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defer configLock.RUnlock()
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if err := config.LogRawMessage(m); err != nil {
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log.WithError(err).Error("Unable to log raw message")
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}
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}(m)
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switch m.Command {
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case "001":
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// 001 is a welcome event, so we join channels there
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c.WriteMessage(&irc.Message{
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Command: "CAP",
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Params: []string{
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"REQ",
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strings.Join([]string{
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"twitch.tv/commands",
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"twitch.tv/membership",
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"twitch.tv/tags",
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}, " "),
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},
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})
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go i.ExecuteJoins(config.Channels)
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case "JOIN":
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// JOIN (Default IRC Command)
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// User enters the channel, might be triggered multiple times
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// should not be used to greet users
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i.handleJoin(m)
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case "NOTICE":
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// NOTICE (Twitch Commands)
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// General notices from the server.
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i.handleTwitchNotice(m)
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case "PART":
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// PART (Default IRC Command)
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// User leaves the channel, might be triggered multiple times
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i.handlePart(m)
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case "PRIVMSG":
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i.handleTwitchPrivmsg(m)
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case "RECONNECT":
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// RECONNECT (Twitch Commands)
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// In this case, reconnect and rejoin channels that were on the connection, as you would normally.
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log.Warn("We were asked to reconnect, closing connection")
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i.Close()
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case "USERNOTICE":
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// USERNOTICE (Twitch Commands)
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// Announces Twitch-specific events to the channel (for example, a user’s subscription notification).
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i.handleTwitchUsernotice(m)
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case "USERSTATE":
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// USERSTATE (Twitch Tags)
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// Sends user-state data when a user joins a channel or sends a PRIVMSG to a channel.
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i.handleTwitchUserstate(m)
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case "WHISPER":
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// WHISPER (Twitch Commands)
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// Delivers whisper-messages received
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i.handleTwitchWhisper(m)
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default:
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log.WithFields(log.Fields{
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"command": m.Command,
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"tags": m.Tags,
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"trailing": m.Trailing(),
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}).Trace("Unhandled message")
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// Unhandled message type, not yet needed
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}
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if err := notifyRawMessageHandlers(m); err != nil {
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log.WithError(err).Error("Unable to notify raw message handlers")
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}
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}
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func (i ircHandler) Run() error { return errors.Wrap(i.c.Run(), "running IRC client") }
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func (i ircHandler) SendMessage(m *irc.Message) error { return i.c.WriteMessage(m) }
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func (ircHandler) getChannel(m *irc.Message) string {
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if len(m.Params) > 0 {
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return m.Params[0]
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}
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return ""
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}
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func (i ircHandler) handleJoin(m *irc.Message) {
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go handleMessage(i.c, m, eventTypeJoin, nil)
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}
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func (i ircHandler) handlePart(m *irc.Message) {
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go handleMessage(i.c, m, eventTypePart, nil)
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}
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func (i ircHandler) handlePermit(m *irc.Message) {
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badges := twitch.ParseBadgeLevels(m)
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if !badges.Has(twitch.BadgeBroadcaster) && (!config.PermitAllowModerator || !badges.Has(twitch.BadgeModerator)) {
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// Neither broadcaster nor moderator or moderator not permitted
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return
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}
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msgParts := strings.Split(m.Trailing(), " ")
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if len(msgParts) != 2 { //nolint:gomnd // This is not a magic number but just an expected count
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return
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}
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username := msgParts[1]
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log.WithField("user", username).Debug("Added permit")
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timerStore.AddPermit(m.Params[0], username)
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go handleMessage(i.c, m, eventTypePermit, nil)
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}
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func (i ircHandler) handleTwitchNotice(m *irc.Message) {
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log.WithFields(log.Fields{
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"channel": i.getChannel(m),
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"tags": m.Tags,
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"trailing": m.Trailing(),
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}).Trace("IRC NOTICE event")
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switch m.Tags["msg-id"] {
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case "":
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// Notices SHOULD have msg-id tags...
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log.WithField("msg", m).Warn("Received notice without msg-id")
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case "host_success", "host_success_viewers":
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log.WithField("trailing", m.Trailing()).Warn("Incoming host")
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go handleMessage(i.c, m, eventTypeHost, nil)
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}
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}
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func (i ircHandler) handleTwitchPrivmsg(m *irc.Message) {
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log.WithFields(log.Fields{
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"channel": i.getChannel(m),
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"name": m.Name,
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"user": m.User,
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"tags": m.Tags,
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"trailing": m.Trailing(),
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}).Trace("Received privmsg")
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if m.User != i.user {
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// Count messages from other users than self
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configLock.RLock()
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for _, am := range config.AutoMessages {
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am.CountMessage(m.Params[0])
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}
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configLock.RUnlock()
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}
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if strings.HasPrefix(m.Trailing(), "!permit") {
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i.handlePermit(m)
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return
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}
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go handleMessage(i.c, m, nil, nil)
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}
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func (i ircHandler) handleTwitchUsernotice(m *irc.Message) {
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log.WithFields(log.Fields{
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"channel": i.getChannel(m),
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"tags": m.Tags,
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"trailing": m.Trailing(),
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}).Trace("IRC USERNOTICE event")
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switch m.Tags["msg-id"] {
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case "":
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// Notices SHOULD have msg-id tags...
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log.WithField("msg", m).Warn("Received usernotice without msg-id")
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case "raid":
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log.WithFields(log.Fields{
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"channel": i.getChannel(m),
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"from": m.Tags["login"],
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"viewercount": m.Tags["msg-param-viewerCount"],
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}).Info("Incoming raid")
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go handleMessage(i.c, m, eventTypeRaid, nil)
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case "resub":
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log.WithFields(log.Fields{
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"channel": i.getChannel(m),
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"from": m.Tags["login"],
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"subscribed_months": m.Tags["msg-param-cumulative-months"],
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"plan": m.Tags["msg-param-sub-plan"],
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}).Info("User re-subscribed")
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go handleMessage(i.c, m, eventTypeResub, nil)
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case "sub":
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log.WithFields(log.Fields{
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"channel": i.getChannel(m),
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"from": m.Tags["login"],
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"plan": m.Tags["msg-param-sub-plan"],
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}).Info("User subscribed")
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go handleMessage(i.c, m, eventTypeSub, nil)
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case "subgift", "anonsubgift":
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log.WithFields(log.Fields{
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"channel": i.getChannel(m),
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"from": m.Tags["login"],
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"gifted_months": m.Tags["msg-param-gift-months"],
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"subscribed_months": m.Tags["msg-param-cumulative-months"],
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"plan": m.Tags["msg-param-sub-plan"],
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"to": m.Tags["msg-param-recipient-user-name"],
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}).Info("User gifted a sub")
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go handleMessage(i.c, m, eventTypeSubgift, nil)
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}
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}
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func (i ircHandler) handleTwitchUserstate(m *irc.Message) {
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state, err := parseTwitchUserState(m)
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if err != nil {
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log.WithError(err).Error("Unable to parse bot user-state")
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return
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}
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botUserstate.Set(plugins.DeriveChannel(m, nil), state)
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}
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func (i ircHandler) handleTwitchWhisper(m *irc.Message) {
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go handleMessage(i.c, m, eventTypeWhisper, nil)
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}
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