mirror of
https://github.com/42wim/matterbridge.git
synced 2024-12-18 09:02:39 +01:00
350 lines
9.8 KiB
Go
350 lines
9.8 KiB
Go
package bdiscord
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import (
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"bytes"
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"fmt"
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"strings"
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"sync"
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"github.com/42wim/matterbridge/bridge"
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"github.com/42wim/matterbridge/bridge/config"
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"github.com/42wim/matterbridge/bridge/discord/transmitter"
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"github.com/42wim/matterbridge/bridge/helper"
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"github.com/matterbridge/discordgo"
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)
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const MessageLength = 1950
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type Bdiscord struct {
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*bridge.Config
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c *discordgo.Session
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nick string
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userID string
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guildID string
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channelsMutex sync.RWMutex
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channels []*discordgo.Channel
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channelInfoMap map[string]*config.ChannelInfo
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membersMutex sync.RWMutex
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userMemberMap map[string]*discordgo.Member
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nickMemberMap map[string]*discordgo.Member
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// Webhook specific logic
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useAutoWebhooks bool
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transmitter *transmitter.Transmitter
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}
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func New(cfg *bridge.Config) bridge.Bridger {
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b := &Bdiscord{Config: cfg}
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b.userMemberMap = make(map[string]*discordgo.Member)
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b.nickMemberMap = make(map[string]*discordgo.Member)
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b.channelInfoMap = make(map[string]*config.ChannelInfo)
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b.useAutoWebhooks = b.GetBool("AutoWebhooks")
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if b.useAutoWebhooks {
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b.Log.Debug("Using automatic webhooks")
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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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token := b.GetString("Token")
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b.Log.Info("Connecting")
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if !strings.HasPrefix(b.GetString("Token"), "Bot ") {
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token = "Bot " + b.GetString("Token")
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}
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// if we have a User token, remove the `Bot` prefix
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if strings.HasPrefix(b.GetString("Token"), "User ") {
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token = strings.Replace(b.GetString("Token"), "User ", "", -1)
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}
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b.c, err = discordgo.New(token)
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if err != nil {
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return err
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}
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b.Log.Info("Connection succeeded")
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b.c.AddHandler(b.messageCreate)
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b.c.AddHandler(b.messageTyping)
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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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b.c.AddHandler(b.messageDeleteBulk)
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b.c.AddHandler(b.memberAdd)
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b.c.AddHandler(b.memberRemove)
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// Add privileged intent for guild member tracking. This is needed to track nicks
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// for display names and @mention translation
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b.c.Identify.Intents = discordgo.MakeIntent(discordgo.IntentsAllWithoutPrivileged |
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discordgo.IntentsGuildMembers)
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err = b.c.Open()
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if err != nil {
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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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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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return err
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}
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serverName := strings.Replace(b.GetString("Server"), "ID:", "", -1)
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b.nick = userinfo.Username
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b.userID = userinfo.ID
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// Try and find this account's guild, and populate channels
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b.channelsMutex.Lock()
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for _, guild := range guilds {
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// Skip, if the server name does not match the visible name or the ID
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if guild.Name != serverName && guild.ID != serverName {
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continue
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}
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// Complain about an ambiguous Server setting. Two Discord servers could have the same title!
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// For IDs, practically this will never happen. It would only trigger if some server's name is also an ID.
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if b.guildID != "" {
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return fmt.Errorf("found multiple Discord servers with the same name %#v, expected to see only one", serverName)
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}
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// Getting this guild's channel could result in a permission error
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b.channels, err = b.c.GuildChannels(guild.ID)
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if err != nil {
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return fmt.Errorf("could not get %#v's channels: %w", b.GetString("Server"), err)
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}
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b.guildID = guild.ID
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}
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b.channelsMutex.Unlock()
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// If we couldn't find a guild, we print extra debug information and return a nice error
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if b.guildID == "" {
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err = fmt.Errorf("could not find Discord server %#v", b.GetString("Server"))
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b.Log.Error(err.Error())
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// Print all of the possible server values
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b.Log.Info("Possible server values:")
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for _, guild := range guilds {
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b.Log.Infof("\t- Server=%#v # by name", guild.Name)
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b.Log.Infof("\t- Server=%#v # by ID", guild.ID)
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}
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// If there are no results, we should say that
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if len(guilds) == 0 {
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b.Log.Info("\t- (none found)")
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}
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return err
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}
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// Legacy note: WebhookURL used to have an actual webhook URL that we would edit,
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// but we stopped doing that due to Discord making rate limits more aggressive.
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//
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// Even older: the same WebhookURL used to be used by every channel, which is usually unexpected.
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// This is no longer possible.
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if b.GetString("WebhookURL") != "" {
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message := "The global WebhookURL setting has been removed. "
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message += "You can get similar \"webhook editing\" behaviour by replacing this line with `AutoWebhooks=true`. "
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message += "If you rely on the old-OLD (non-editing) behaviour, can move the WebhookURL to specific channel sections."
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b.Log.Errorln(message)
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return fmt.Errorf("use of removed WebhookURL setting")
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}
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if b.GetInt("debuglevel") > 0 {
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b.Log.Debug("enabling even more discord debug")
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b.c.Debug = true
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}
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// Initialise webhook management
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b.transmitter = transmitter.New(b.c, b.guildID, "matterbridge", b.useAutoWebhooks)
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b.transmitter.Log = b.Log
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var webhookChannelIDs []string
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for _, channel := range b.Channels {
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channelID := b.getChannelID(channel.Name) // note(qaisjp): this readlocks channelsMutex
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// If a WebhookURL was not explicitly provided for this channel,
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// there are two options: just a regular bot message (ugly) or this is should be webhook sent
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if channel.Options.WebhookURL == "" {
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// If it should be webhook sent, we should enforce this via the transmitter
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if b.useAutoWebhooks {
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webhookChannelIDs = append(webhookChannelIDs, channelID)
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}
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continue
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}
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whID, whToken, ok := b.splitURL(channel.Options.WebhookURL)
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if !ok {
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return fmt.Errorf("failed to parse WebhookURL %#v for channel %#v", channel.Options.WebhookURL, channel.ID)
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}
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b.transmitter.AddWebhook(channelID, &discordgo.Webhook{
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ID: whID,
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Token: whToken,
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GuildID: b.guildID,
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ChannelID: channelID,
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})
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}
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if b.useAutoWebhooks {
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err = b.transmitter.RefreshGuildWebhooks(webhookChannelIDs)
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if err != nil {
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b.Log.WithError(err).Println("transmitter could not refresh guild webhooks")
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return err
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}
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}
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// Obtaining guild members and initializing nickname mapping.
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b.membersMutex.Lock()
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defer b.membersMutex.Unlock()
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members, err := b.c.GuildMembers(b.guildID, "", 1000)
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if err != nil {
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b.Log.Error("Error obtaining server members: ", err)
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return err
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}
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for _, member := range members {
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if member == nil {
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b.Log.Warnf("Skipping missing information for a user.")
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continue
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}
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b.userMemberMap[member.User.ID] = member
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b.nickMemberMap[member.User.Username] = member
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if member.Nick != "" {
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b.nickMemberMap[member.Nick] = member
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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 b.c.Close()
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}
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func (b *Bdiscord) JoinChannel(channel config.ChannelInfo) error {
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b.channelsMutex.Lock()
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defer b.channelsMutex.Unlock()
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b.channelInfoMap[channel.ID] = &channel
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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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b.Log.Debugf("=> Receiving %#v", msg)
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channelID := b.getChannelID(msg.Channel)
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if channelID == "" {
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return "", fmt.Errorf("Could not find channelID for %v", msg.Channel)
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}
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if msg.Event == config.EventUserTyping {
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if b.GetBool("ShowUserTyping") {
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err := b.c.ChannelTyping(channelID)
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return "", err
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}
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return "", nil
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}
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// Make a action /me of the message
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if msg.Event == config.EventUserAction {
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msg.Text = "_" + msg.Text + "_"
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}
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// Handle prefix hint for unthreaded messages.
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if msg.ParentNotFound() {
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msg.ParentID = ""
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msg.Text = fmt.Sprintf("[thread]: %s", msg.Text)
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}
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// Use webhook to send the message
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useWebhooks := b.shouldMessageUseWebhooks(&msg)
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if useWebhooks && msg.Event != config.EventMsgDelete && msg.ParentID == "" {
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return b.handleEventWebhook(&msg, channelID)
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}
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return b.handleEventBotUser(&msg, channelID)
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}
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// handleEventDirect handles events via the bot user
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func (b *Bdiscord) handleEventBotUser(msg *config.Message, channelID string) (string, error) {
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b.Log.Debugf("Broadcasting using token (API)")
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// Delete message
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if msg.Event == config.EventMsgDelete {
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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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// Upload a file if it exists
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if msg.Extra != nil {
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for _, rmsg := range helper.HandleExtra(msg, b.General) {
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rmsg.Text = helper.ClipMessage(rmsg.Text, MessageLength, b.GetString("MessageClipped"))
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if _, err := b.c.ChannelMessageSend(channelID, rmsg.Username+rmsg.Text); err != nil {
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b.Log.Errorf("Could not send message %#v: %s", rmsg, err)
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}
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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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return b.handleUploadFile(msg, channelID)
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}
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}
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msg.Text = helper.ClipMessage(msg.Text, MessageLength, b.GetString("MessageClipped"))
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msg.Text = b.replaceUserMentions(msg.Text)
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// Edit message
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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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m := discordgo.MessageSend{
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Content: msg.Username + msg.Text,
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AllowedMentions: b.getAllowedMentions(),
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}
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if msg.ParentValid() {
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m.Reference = &discordgo.MessageReference{
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MessageID: msg.ParentID,
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ChannelID: channelID,
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GuildID: b.guildID,
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}
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}
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// Post normal message
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res, err := b.c.ChannelMessageSendComplex(channelID, &m)
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if err != nil {
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return "", err
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}
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return res.ID, nil
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}
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// handleUploadFile handles native upload of files
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func (b *Bdiscord) handleUploadFile(msg *config.Message, channelID string) (string, error) {
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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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file := discordgo.File{
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Name: fi.Name,
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ContentType: "",
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Reader: bytes.NewReader(*fi.Data),
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}
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m := discordgo.MessageSend{
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Content: msg.Username + fi.Comment,
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Files: []*discordgo.File{&file},
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AllowedMentions: b.getAllowedMentions(),
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}
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_, err = b.c.ChannelMessageSendComplex(channelID, &m)
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if err != nil {
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return "", fmt.Errorf("file upload failed: %s", err)
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}
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}
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return "", nil
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}
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