409 lines
10 KiB
Go
409 lines
10 KiB
Go
package bdiscord
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import (
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"bytes"
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"github.com/42wim/matterbridge/bridge/config"
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"github.com/42wim/matterbridge/bridge/helper"
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log "github.com/Sirupsen/logrus"
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"github.com/bwmarrin/discordgo"
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"regexp"
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"strings"
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"sync"
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)
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type bdiscord struct {
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c *discordgo.Session
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Channels []*discordgo.Channel
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Nick string
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UseChannelID bool
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userMemberMap map[string]*discordgo.Member
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guildID string
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webhookID string
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webhookToken string
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channelInfoMap map[string]*config.ChannelInfo
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sync.RWMutex
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*config.BridgeConfig
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}
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var flog *log.Entry
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var protocol = "discord"
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func init() {
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flog = log.WithFields(log.Fields{"module": protocol})
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}
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func New(cfg *config.BridgeConfig) *bdiscord {
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b := &bdiscord{BridgeConfig: cfg}
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b.userMemberMap = make(map[string]*discordgo.Member)
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b.channelInfoMap = make(map[string]*config.ChannelInfo)
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if b.Config.WebhookURL != "" {
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flog.Debug("Configuring Discord Incoming Webhook")
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b.webhookID, b.webhookToken = b.splitURL(b.Config.WebhookURL)
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}
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return b
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}
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func (b *bdiscord) Connect() error {
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var err error
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flog.Info("Connecting")
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if b.Config.WebhookURL == "" {
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flog.Info("Connecting using token")
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} else {
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flog.Info("Connecting using webhookurl (for posting) and token")
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}
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if !strings.HasPrefix(b.Config.Token, "Bot ") {
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b.Config.Token = "Bot " + b.Config.Token
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}
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b.c, err = discordgo.New(b.Config.Token)
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if err != nil {
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flog.Debugf("%#v", err)
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return err
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}
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flog.Info("Connection succeeded")
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b.c.AddHandler(b.messageCreate)
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b.c.AddHandler(b.memberUpdate)
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b.c.AddHandler(b.messageUpdate)
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b.c.AddHandler(b.messageDelete)
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err = b.c.Open()
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if err != nil {
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flog.Debugf("%#v", err)
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return err
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}
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guilds, err := b.c.UserGuilds(100, "", "")
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if err != nil {
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flog.Debugf("%#v", err)
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return err
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}
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userinfo, err := b.c.User("@me")
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if err != nil {
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flog.Debugf("%#v", err)
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return err
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}
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b.Nick = userinfo.Username
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for _, guild := range guilds {
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if guild.Name == b.Config.Server {
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b.Channels, err = b.c.GuildChannels(guild.ID)
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b.guildID = guild.ID
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if err != nil {
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flog.Debugf("%#v", err)
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return err
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}
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}
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}
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return nil
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}
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func (b *bdiscord) Disconnect() error {
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return nil
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}
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func (b *bdiscord) JoinChannel(channel config.ChannelInfo) error {
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b.channelInfoMap[channel.ID] = &channel
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idcheck := strings.Split(channel.Name, "ID:")
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if len(idcheck) > 1 {
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b.UseChannelID = true
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}
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return nil
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}
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func (b *bdiscord) Send(msg config.Message) (string, error) {
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flog.Debugf("Receiving %#v", msg)
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channelID := b.getChannelID(msg.Channel)
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if channelID == "" {
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flog.Errorf("Could not find channelID for %v", msg.Channel)
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return "", nil
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}
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if msg.Event == config.EVENT_USER_ACTION {
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msg.Text = "_" + msg.Text + "_"
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}
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wID := b.webhookID
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wToken := b.webhookToken
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if ci, ok := b.channelInfoMap[msg.Channel+b.Account]; ok {
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if ci.Options.WebhookURL != "" {
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wID, wToken = b.splitURL(ci.Options.WebhookURL)
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}
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}
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if wID == "" {
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flog.Debugf("Broadcasting using token (API)")
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if msg.Event == config.EVENT_MSG_DELETE {
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if msg.ID == "" {
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return "", nil
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}
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err := b.c.ChannelMessageDelete(channelID, msg.ID)
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return "", err
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}
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if msg.ID != "" {
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_, err := b.c.ChannelMessageEdit(channelID, msg.ID, msg.Username+msg.Text)
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return msg.ID, err
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}
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if msg.Extra != nil {
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for _, rmsg := range helper.HandleExtra(&msg, b.General) {
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b.c.ChannelMessageSend(channelID, rmsg.Username+rmsg.Text)
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}
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// check if we have files to upload (from slack, telegram or mattermost)
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if len(msg.Extra["file"]) > 0 {
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var err error
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for _, f := range msg.Extra["file"] {
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fi := f.(config.FileInfo)
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files := []*discordgo.File{}
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files = append(files, &discordgo.File{fi.Name, "", bytes.NewReader(*fi.Data)})
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_, err = b.c.ChannelMessageSendComplex(channelID, &discordgo.MessageSend{Content: msg.Username + fi.Comment, Files: files})
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if err != nil {
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flog.Errorf("file upload failed: %#v", err)
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}
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}
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return "", nil
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}
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}
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res, err := b.c.ChannelMessageSend(channelID, msg.Username+msg.Text)
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if err != nil {
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return "", err
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}
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return res.ID, err
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}
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flog.Debugf("Broadcasting using Webhook")
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err := b.c.WebhookExecute(
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wID,
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wToken,
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true,
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&discordgo.WebhookParams{
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Content: msg.Text,
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Username: msg.Username,
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AvatarURL: msg.Avatar,
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})
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return "", err
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}
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func (b *bdiscord) messageDelete(s *discordgo.Session, m *discordgo.MessageDelete) {
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rmsg := config.Message{Account: b.Account, ID: m.ID, Event: config.EVENT_MSG_DELETE, Text: config.EVENT_MSG_DELETE}
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rmsg.Channel = b.getChannelName(m.ChannelID)
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if b.UseChannelID {
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rmsg.Channel = "ID:" + m.ChannelID
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}
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flog.Debugf("Sending message from %s to gateway", b.Account)
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flog.Debugf("Message is %#v", rmsg)
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b.Remote <- rmsg
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}
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func (b *bdiscord) messageUpdate(s *discordgo.Session, m *discordgo.MessageUpdate) {
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if b.Config.EditDisable {
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return
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}
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// only when message is actually edited
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if m.Message.EditedTimestamp != "" {
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flog.Debugf("Sending edit message")
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m.Content = m.Content + b.Config.EditSuffix
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b.messageCreate(s, (*discordgo.MessageCreate)(m))
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}
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}
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func (b *bdiscord) messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {
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// not relay our own messages
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if m.Author.Username == b.Nick {
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return
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}
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// if using webhooks, do not relay if it's ours
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if b.useWebhook() && m.Author.Bot && b.isWebhookID(m.Author.ID) {
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return
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}
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if len(m.Attachments) > 0 {
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for _, attach := range m.Attachments {
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m.Content = m.Content + "\n" + attach.URL
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}
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}
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var text string
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if m.Content != "" {
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flog.Debugf("Receiving message %#v", m.Message)
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if len(m.MentionRoles) > 0 {
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m.Message.Content = b.replaceRoleMentions(m.Message.Content)
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}
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m.Message.Content = b.stripCustomoji(m.Message.Content)
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m.Message.Content = b.replaceChannelMentions(m.Message.Content)
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text = m.ContentWithMentionsReplaced()
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}
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rmsg := config.Message{Account: b.Account, Avatar: "https://cdn.discordapp.com/avatars/" + m.Author.ID + "/" + m.Author.Avatar + ".jpg",
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UserID: m.Author.ID, ID: m.ID}
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rmsg.Channel = b.getChannelName(m.ChannelID)
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if b.UseChannelID {
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rmsg.Channel = "ID:" + m.ChannelID
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}
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if !b.Config.UseUserName {
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rmsg.Username = b.getNick(m.Author)
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} else {
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rmsg.Username = m.Author.Username
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}
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if b.Config.ShowEmbeds && m.Message.Embeds != nil {
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for _, embed := range m.Message.Embeds {
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text = text + "embed: " + embed.Title + " - " + embed.Description + " - " + embed.URL + "\n"
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}
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}
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// no empty messages
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if text == "" {
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return
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}
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text, ok := b.replaceAction(text)
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if ok {
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rmsg.Event = config.EVENT_USER_ACTION
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}
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rmsg.Text = text
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flog.Debugf("Sending message from %s on %s to gateway", m.Author.Username, b.Account)
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flog.Debugf("Message is %#v", rmsg)
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b.Remote <- rmsg
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}
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func (b *bdiscord) memberUpdate(s *discordgo.Session, m *discordgo.GuildMemberUpdate) {
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b.Lock()
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if _, ok := b.userMemberMap[m.Member.User.ID]; ok {
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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)
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}
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b.userMemberMap[m.Member.User.ID] = m.Member
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b.Unlock()
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}
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func (b *bdiscord) getNick(user *discordgo.User) string {
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var err error
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b.Lock()
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defer b.Unlock()
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if _, ok := b.userMemberMap[user.ID]; ok {
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if b.userMemberMap[user.ID] != nil {
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if b.userMemberMap[user.ID].Nick != "" {
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// only return if nick is set
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return b.userMemberMap[user.ID].Nick
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}
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// otherwise return username
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return user.Username
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}
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}
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// if we didn't find nick, search for it
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member, err := b.c.GuildMember(b.guildID, user.ID)
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if err != nil {
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return user.Username
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}
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b.userMemberMap[user.ID] = member
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// only return if nick is set
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if b.userMemberMap[user.ID].Nick != "" {
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return b.userMemberMap[user.ID].Nick
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}
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return user.Username
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}
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func (b *bdiscord) getChannelID(name string) string {
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idcheck := strings.Split(name, "ID:")
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if len(idcheck) > 1 {
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return idcheck[1]
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}
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for _, channel := range b.Channels {
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if channel.Name == name {
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return channel.ID
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}
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}
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return ""
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}
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func (b *bdiscord) getChannelName(id string) string {
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for _, channel := range b.Channels {
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if channel.ID == id {
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return channel.Name
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}
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}
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return ""
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}
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func (b *bdiscord) replaceRoleMentions(text string) string {
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roles, err := b.c.GuildRoles(b.guildID)
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if err != nil {
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flog.Debugf("%#v", string(err.(*discordgo.RESTError).ResponseBody))
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return text
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}
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for _, role := range roles {
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text = strings.Replace(text, "<@&"+role.ID+">", "@"+role.Name, -1)
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}
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return text
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}
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func (b *bdiscord) replaceChannelMentions(text string) string {
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var err error
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re := regexp.MustCompile("<#[0-9]+>")
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text = re.ReplaceAllStringFunc(text, func(m string) string {
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channel := b.getChannelName(m[2 : len(m)-1])
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// if at first don't succeed, try again
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if channel == "" {
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b.Channels, err = b.c.GuildChannels(b.guildID)
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if err != nil {
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return "#unknownchannel"
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}
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channel = b.getChannelName(m[2 : len(m)-1])
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return "#" + channel
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}
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return "#" + channel
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})
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return text
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}
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func (b *bdiscord) replaceAction(text string) (string, bool) {
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if strings.HasPrefix(text, "_") && strings.HasSuffix(text, "_") {
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return strings.Replace(text, "_", "", -1), true
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}
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return text, false
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}
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func (b *bdiscord) stripCustomoji(text string) string {
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// <:doge:302803592035958784>
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re := regexp.MustCompile("<(:.*?:)[0-9]+>")
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return re.ReplaceAllString(text, `$1`)
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}
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// splitURL splits a webhookURL and returns the id and token
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func (b *bdiscord) splitURL(url string) (string, string) {
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webhookURLSplit := strings.Split(url, "/")
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if len(webhookURLSplit) != 7 {
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log.Fatalf("%s is no correct discord WebhookURL", url)
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}
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return webhookURLSplit[len(webhookURLSplit)-2], webhookURLSplit[len(webhookURLSplit)-1]
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}
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// useWebhook returns true if we have a webhook defined somewhere
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func (b *bdiscord) useWebhook() bool {
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if b.Config.WebhookURL != "" {
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return true
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}
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for _, channel := range b.channelInfoMap {
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if channel.Options.WebhookURL != "" {
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return true
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}
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}
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return false
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}
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// isWebhookID returns true if the specified id is used in a defined webhook
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func (b *bdiscord) isWebhookID(id string) bool {
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if b.Config.WebhookURL != "" {
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wID, _ := b.splitURL(b.Config.WebhookURL)
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if wID == id {
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return true
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}
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}
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for _, channel := range b.channelInfoMap {
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if channel.Options.WebhookURL != "" {
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wID, _ := b.splitURL(channel.Options.WebhookURL)
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if wID == id {
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return true
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}
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}
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}
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return false
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}
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