package bdiscord import ( "bytes" "github.com/42wim/matterbridge/bridge/config" log "github.com/Sirupsen/logrus" "github.com/bwmarrin/discordgo" "regexp" "strings" "sync" ) type bdiscord struct { c *discordgo.Session Config *config.Protocol Remote chan config.Message Account string Channels []*discordgo.Channel Nick string UseChannelID bool userMemberMap map[string]*discordgo.Member guildID string webhookID string webhookToken string channelInfoMap map[string]*config.ChannelInfo sync.RWMutex } var flog *log.Entry var protocol = "discord" func init() { flog = log.WithFields(log.Fields{"module": protocol}) } func New(cfg config.Protocol, account string, c chan config.Message) *bdiscord { b := &bdiscord{} b.Config = &cfg b.Remote = c b.Account = account b.userMemberMap = make(map[string]*discordgo.Member) b.channelInfoMap = make(map[string]*config.ChannelInfo) if b.Config.WebhookURL != "" { flog.Debug("Configuring Discord Incoming Webhook") b.webhookID, b.webhookToken = b.splitURL(b.Config.WebhookURL) } return b } func (b *bdiscord) Connect() error { var err error flog.Info("Connecting") if b.Config.WebhookURL == "" { flog.Info("Connecting using token") } else { flog.Info("Connecting using webhookurl (for posting) and token") } if !strings.HasPrefix(b.Config.Token, "Bot ") { b.Config.Token = "Bot " + b.Config.Token } b.c, err = discordgo.New(b.Config.Token) if err != nil { flog.Debugf("%#v", err) return err } flog.Info("Connection succeeded") b.c.AddHandler(b.messageCreate) b.c.AddHandler(b.memberUpdate) b.c.AddHandler(b.messageUpdate) b.c.AddHandler(b.messageDelete) err = b.c.Open() if err != nil { flog.Debugf("%#v", err) return err } guilds, err := b.c.UserGuilds(100, "", "") if err != nil { flog.Debugf("%#v", err) return err } userinfo, err := b.c.User("@me") if err != nil { flog.Debugf("%#v", err) return err } b.Nick = userinfo.Username for _, guild := range guilds { if guild.Name == b.Config.Server { b.Channels, err = b.c.GuildChannels(guild.ID) b.guildID = guild.ID if err != nil { flog.Debugf("%#v", err) return err } } } return nil } func (b *bdiscord) Disconnect() error { return nil } func (b *bdiscord) JoinChannel(channel config.ChannelInfo) error { b.channelInfoMap[channel.ID] = &channel idcheck := strings.Split(channel.Name, "ID:") if len(idcheck) > 1 { b.UseChannelID = true } return nil } func (b *bdiscord) Send(msg config.Message) (string, error) { flog.Debugf("Receiving %#v", msg) channelID := b.getChannelID(msg.Channel) if channelID == "" { flog.Errorf("Could not find channelID for %v", msg.Channel) return "", nil } if msg.Event == config.EVENT_USER_ACTION { msg.Text = "_" + msg.Text + "_" } wID := b.webhookID wToken := b.webhookToken if ci, ok := b.channelInfoMap[msg.Channel+b.Account]; ok { if ci.Options.WebhookURL != "" { wID, wToken = b.splitURL(ci.Options.WebhookURL) } } if wID == "" { flog.Debugf("Broadcasting using token (API)") if msg.Event == config.EVENT_MSG_DELETE { if msg.ID == "" { return "", nil } err := b.c.ChannelMessageDelete(channelID, msg.ID) return "", err } if msg.ID != "" { _, err := b.c.ChannelMessageEdit(channelID, msg.ID, msg.Username+msg.Text) return msg.ID, err } if msg.Extra != nil { // check if we have files to upload (from slack, telegram or mattermost) if len(msg.Extra["file"]) > 0 { for _, f := range msg.Extra["file"] { fi := f.(config.FileInfo) files := []*discordgo.File{} files = append(files, &discordgo.File{fi.Name, "", bytes.NewReader(*fi.Data)}) res, err := b.c.ChannelMessageSendComplex(channelID, &discordgo.MessageSend{Content: msg.Text, Files: files}) if err != nil { flog.Debugf("ERROR channelMessageSendComplex: %#v", err) return "", err } return res.ID, err } } } res, err := b.c.ChannelMessageSend(channelID, msg.Username+msg.Text) if err != nil { return "", err } return res.ID, err } flog.Debugf("Broadcasting using Webhook") err := b.c.WebhookExecute( wID, wToken, true, &discordgo.WebhookParams{ Content: msg.Text, Username: msg.Username, AvatarURL: msg.Avatar, }) return "", err } func (b *bdiscord) messageDelete(s *discordgo.Session, m *discordgo.MessageDelete) { rmsg := config.Message{Account: b.Account, ID: m.ID, Event: config.EVENT_MSG_DELETE, Text: config.EVENT_MSG_DELETE} rmsg.Channel = b.getChannelName(m.ChannelID) if b.UseChannelID { rmsg.Channel = "ID:" + m.ChannelID } flog.Debugf("Sending message from %s to gateway", b.Account) flog.Debugf("Message is %#v", rmsg) b.Remote <- rmsg } func (b *bdiscord) messageUpdate(s *discordgo.Session, m *discordgo.MessageUpdate) { if b.Config.EditDisable { return } // only when message is actually edited if m.Message.EditedTimestamp != "" { flog.Debugf("Sending edit message") m.Content = m.Content + b.Config.EditSuffix b.messageCreate(s, (*discordgo.MessageCreate)(m)) } } func (b *bdiscord) messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) { // not relay our own messages if m.Author.Username == b.Nick { return } // if using webhooks, do not relay if it's ours if b.useWebhook() && m.Author.Bot && b.isWebhookID(m.Author.ID) { return } if len(m.Attachments) > 0 { for _, attach := range m.Attachments { m.Content = m.Content + "\n" + attach.URL } } var text string if m.Content != "" { flog.Debugf("Receiving message %#v", m.Message) if len(m.MentionRoles) > 0 { m.Message.Content = b.replaceRoleMentions(m.Message.Content) } m.Message.Content = b.stripCustomoji(m.Message.Content) m.Message.Content = b.replaceChannelMentions(m.Message.Content) text = m.ContentWithMentionsReplaced() } rmsg := config.Message{Account: b.Account, Avatar: "https://cdn.discordapp.com/avatars/" + m.Author.ID + "/" + m.Author.Avatar + ".jpg", UserID: m.Author.ID, ID: m.ID} rmsg.Channel = b.getChannelName(m.ChannelID) if b.UseChannelID { rmsg.Channel = "ID:" + m.ChannelID } if !b.Config.UseUserName { rmsg.Username = b.getNick(m.Author) } else { rmsg.Username = m.Author.Username } if b.Config.ShowEmbeds && m.Message.Embeds != nil { for _, embed := range m.Message.Embeds { text = text + "embed: " + embed.Title + " - " + embed.Description + " - " + embed.URL + "\n" } } // no empty messages if text == "" { return } text, ok := b.replaceAction(text) if ok { rmsg.Event = config.EVENT_USER_ACTION } rmsg.Text = text flog.Debugf("Sending message from %s on %s to gateway", m.Author.Username, b.Account) flog.Debugf("Message is %#v", rmsg) b.Remote <- rmsg } func (b *bdiscord) memberUpdate(s *discordgo.Session, m *discordgo.GuildMemberUpdate) { b.Lock() if _, ok := b.userMemberMap[m.Member.User.ID]; ok { flog.Debugf("%s: memberupdate: user %s (nick %s) changes nick to %s", b.Account, m.Member.User.Username, b.userMemberMap[m.Member.User.ID].Nick, m.Member.Nick) } b.userMemberMap[m.Member.User.ID] = m.Member b.Unlock() } func (b *bdiscord) getNick(user *discordgo.User) string { var err error b.Lock() defer b.Unlock() if _, ok := b.userMemberMap[user.ID]; ok { if b.userMemberMap[user.ID] != nil { if b.userMemberMap[user.ID].Nick != "" { // only return if nick is set return b.userMemberMap[user.ID].Nick } // otherwise return username return user.Username } } // if we didn't find nick, search for it member, err := b.c.GuildMember(b.guildID, user.ID) if err != nil { return user.Username } b.userMemberMap[user.ID] = member // only return if nick is set if b.userMemberMap[user.ID].Nick != "" { return b.userMemberMap[user.ID].Nick } return user.Username } func (b *bdiscord) getChannelID(name string) string { idcheck := strings.Split(name, "ID:") if len(idcheck) > 1 { return idcheck[1] } for _, channel := range b.Channels { if channel.Name == name { return channel.ID } } return "" } func (b *bdiscord) getChannelName(id string) string { for _, channel := range b.Channels { if channel.ID == id { return channel.Name } } return "" } func (b *bdiscord) replaceRoleMentions(text string) string { roles, err := b.c.GuildRoles(b.guildID) if err != nil { flog.Debugf("%#v", string(err.(*discordgo.RESTError).ResponseBody)) return text } for _, role := range roles { text = strings.Replace(text, "<@&"+role.ID+">", "@"+role.Name, -1) } return text } func (b *bdiscord) replaceChannelMentions(text string) string { var err error re := regexp.MustCompile("<#[0-9]+>") text = re.ReplaceAllStringFunc(text, func(m string) string { channel := b.getChannelName(m[2 : len(m)-1]) // if at first don't succeed, try again if channel == "" { b.Channels, err = b.c.GuildChannels(b.guildID) if err != nil { return "#unknownchannel" } channel = b.getChannelName(m[2 : len(m)-1]) return "#" + channel } return "#" + channel }) return text } func (b *bdiscord) replaceAction(text string) (string, bool) { if strings.HasPrefix(text, "_") && strings.HasSuffix(text, "_") { return strings.Replace(text, "_", "", -1), true } return text, false } func (b *bdiscord) stripCustomoji(text string) string { // <:doge:302803592035958784> re := regexp.MustCompile("<(:.*?:)[0-9]+>") return re.ReplaceAllString(text, `$1`) } // splitURL splits a webhookURL and returns the id and token func (b *bdiscord) splitURL(url string) (string, string) { webhookURLSplit := strings.Split(url, "/") return webhookURLSplit[len(webhookURLSplit)-2], webhookURLSplit[len(webhookURLSplit)-1] } // useWebhook returns true if we have a webhook defined somewhere func (b *bdiscord) useWebhook() bool { if b.Config.WebhookURL != "" { return true } for _, channel := range b.channelInfoMap { if channel.Options.WebhookURL != "" { return true } } return false } // isWebhookID returns true if the specified id is used in a defined webhook func (b *bdiscord) isWebhookID(id string) bool { if b.Config.WebhookURL != "" { wID, _ := b.splitURL(b.Config.WebhookURL) if wID == id { return true } } for _, channel := range b.channelInfoMap { if channel.Options.WebhookURL != "" { wID, _ := b.splitURL(channel.Options.WebhookURL) if wID == id { return true } } } return false }