Bump version to v0.6.0

Signed-off-by: Sumner Evans <sumner@beeper.com>

CHANGELOG.md

@@ -1,3 +1,66 @@
+# v0.6.0 (2023-07-16)
+
+* Added initial support for backfilling threads.
+* Exposed `Application` flag to displayname template.
+* Changed `m.emote` bridging to use italics on Discord.
+* Updated Docker image to Alpine 3.18.
+* Added limit to parallel media transfers to avoid high memory usage if lots
+  of messages are received at the same time.
+* Fixed guilds being unbridged if Discord has server issues and temporarily
+  marks a guild as unavailable.
+* Fixed using `guilds bridge` command without `--entire` flag.
+* Fixed panic if lottieconverter isn't installed.
+* Fixed relay webhook secret being leaked in network error messages.
+
+# v0.5.0 (2023-06-16)
+
+* Added support for intentional mentions in Matrix (MSC3952).
+* Added `GlobalName` variable to displayname templates and updated the default
+  template to prefer it over usernames.
+* Added `Webhook` variable to displayname templates to allow determining if a
+  ghost user is a webhook.
+* Added guild profiles and webhook profiles as a custom field in Matrix
+  message events.
+* Added support for bulk message delete from Discord.
+* Added support for appservice websockets.
+* Enabled parsing headers (`#`) in Discord markdown.
+* Messages that consist of a single image link are now bridged as images to
+  closer match Discord.
+* Stopped bridging incoming typing notifications from users who are logged into
+  the bridge to prevent echoes.
+
+# v0.4.0 (2023-05-16)
+
+* Added bridging of friend nicks into DM room names.
+* Added option to bypass homeserver for Discord media.
+  See [docs](https://docs.mau.fi/bridges/go/discord/direct-media.html) for more info.
+* Added conversion of replies to embeds when sending messages via webhook.
+* Added option to disable caching reuploaded media. This may be necessary when
+  using a media repo that doesn't create a unique mxc URI for each upload.
+* Added option to disable uploading files directly to the Discord CDN
+  (and send as form parts in the message send request instead).
+* Improved formatting of error messages returned by Discord.
+* Enabled discordgo info logs by default.
+* Fixed limited backfill always stopping after 50 messages
+  (thanks to [@odrling] in [#81]).
+* Fixed startup sync to sync most recent private channels first.
+* Fixed syncing group DM participants when they change.
+* Fixed bridging animated emojis in messages.
+* Stopped handling all message edits from relay webhook to prevent incorrect
+  edits.
+* Possibly fixed inviting to portal rooms when multiple Matrix users use the
+  bridge.
+
+[@odrling]: https://github.com/odrling
+[#81]: https://github.com/mautrix/discord/pull/81
+
+# v0.3.0 (2023-04-16)
+
+* Added support for backfilling on room creation and missed messages on startup.
+* Added options to automatically ratchet/delete megolm sessions to minimize
+  access to old messages.
+* Added basic support for incoming voice messages.
+
 # v0.2.0 (2023-03-16)
 
 * Switched to zerolog for logging.

Dockerfile

@@ -1,6 +1,6 @@
-FROM dock.mau.dev/tulir/lottieconverter:alpine-3.17 AS lottie
+FROM dock.mau.dev/tulir/lottieconverter:alpine-3.18 AS lottie
 
-FROM golang:1-alpine3.17 AS builder
+FROM golang:1-alpine3.18 AS builder
 
 RUN apk add --no-cache git ca-certificates build-base su-exec olm-dev
 
@@ -8,7 +8,7 @@ COPY . /build
 WORKDIR /build
 RUN go build -o /usr/bin/mautrix-discord
 
-FROM alpine:3.17
+FROM alpine:3.18
 
 ENV UID=1337 \
     GID=1337

Dockerfile.ci

@@ -1,6 +1,6 @@
-FROM dock.mau.dev/tulir/lottieconverter:alpine-3.17 AS lottie
+FROM dock.mau.dev/tulir/lottieconverter:alpine-3.18 AS lottie
 
-FROM alpine:3.17
+FROM alpine:3.18
 
 ENV UID=1337 \
     GID=1337

Dockerfile.dev

@@ -1,6 +1,6 @@
-FROM dock.mau.dev/tulir/lottieconverter:alpine-3.17 AS lottie
+FROM dock.mau.dev/tulir/lottieconverter:alpine-3.18 AS lottie
 
-FROM golang:1-alpine3.17 AS builder
+FROM golang:1-alpine3.18 AS builder
 
 RUN apk add --no-cache git ca-certificates build-base su-exec olm-dev bash jq yq curl \
     zlib libpng giflib libstdc++ libgcc

attachments.go

@@ -3,6 +3,7 @@ package main
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"image"
 	"io"
@@ -12,6 +13,7 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/bwmarrin/discordgo"
@@ -28,7 +30,7 @@ import (
 	"go.mau.fi/mautrix-discord/database"
 )
 
-func downloadDiscordAttachment(url string) ([]byte, error) {
+func downloadDiscordAttachment(url string, maxSize int64) ([]byte, error) {
 	req, err := http.NewRequest(http.MethodGet, url, nil)
 	if err != nil {
 		return nil, err
@@ -44,9 +46,24 @@ func downloadDiscordAttachment(url string) ([]byte, error) {
 	defer resp.Body.Close()
 	if resp.StatusCode > 300 {
 		data, _ := io.ReadAll(resp.Body)
-		return nil, fmt.Errorf("unexpected status %d: %s", resp.StatusCode, data)
+		return nil, fmt.Errorf("unexpected status %d downloading %s: %s", resp.StatusCode, url, data)
+	}
+	if resp.Header.Get("Content-Length") != "" {
+		length, err := strconv.ParseInt(resp.Header.Get("Content-Length"), 10, 64)
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse content length: %w", err)
+		} else if length > maxSize {
+			return nil, fmt.Errorf("attachment too large (%d > %d)", length, maxSize)
+		}
+		return io.ReadAll(resp.Body)
+	} else {
+		var mbe *http.MaxBytesError
+		data, err := io.ReadAll(http.MaxBytesReader(nil, resp.Body, maxSize))
+		if err != nil && errors.As(err, &mbe) {
+			return nil, fmt.Errorf("attachment too large (over %d)", maxSize)
+		}
+		return data, err
 	}
-	return io.ReadAll(resp.Body)
 }
 
 func uploadDiscordAttachment(url string, data []byte) error {
@@ -99,7 +116,7 @@ func downloadMatrixAttachment(intent *appservice.IntentAPI, content *event.Messa
 	return data, nil
 }
 
-func (br *DiscordBridge) uploadMatrixAttachment(intent *appservice.IntentAPI, data []byte, url string, encrypt bool, meta AttachmentMeta) (*database.File, error) {
+func (br *DiscordBridge) uploadMatrixAttachment(intent *appservice.IntentAPI, data []byte, url string, encrypt bool, meta AttachmentMeta, semaWg *sync.WaitGroup) (*database.File, error) {
 	dbFile := br.DB.File.New()
 	dbFile.Timestamp = time.Now()
 	dbFile.URL = url
@@ -128,17 +145,19 @@ func (br *DiscordBridge) uploadMatrixAttachment(intent *appservice.IntentAPI, da
 		ContentType:  uploadMime,
 	}
 	if br.Config.Homeserver.AsyncMedia {
-		resp, err := intent.UnstableCreateMXC()
+		resp, err := intent.CreateMXC()
 		if err != nil {
 			return nil, err
 		}
 		dbFile.MXC = resp.ContentURI
-		req.UnstableMXC = resp.ContentURI
+		req.MXC = resp.ContentURI
-		req.UploadURL = resp.UploadURL
+		req.UnstableUploadURL = resp.UnstableUploadURL
+		semaWg.Add(1)
 		go func() {
+			defer semaWg.Done()
 			_, err = intent.UploadMedia(req)
 			if err != nil {
-				br.Log.Errorfln("Failed to upload %s: %v", req.UnstableMXC, err)
+				br.Log.Errorfln("Failed to upload %s: %v", req.MXC, err)
 				dbFile.Delete()
 			}
 		}()
@@ -246,7 +265,7 @@ func (br *DiscordBridge) convertLottie(data []byte) ([]byte, string, error) {
 }
 
 func (br *DiscordBridge) copyAttachmentToMatrix(intent *appservice.IntentAPI, url string, encrypt bool, meta AttachmentMeta) (returnDBFile *database.File, returnErr error) {
-	isCacheable := !encrypt
+	isCacheable := br.Config.Bridge.CacheMedia != "never" && (br.Config.Bridge.CacheMedia == "always" || !encrypt)
 	returnDBFile = br.DB.File.Get(url, encrypt)
 	if returnDBFile == nil {
 		transferKey := attachmentKey{url, encrypt}
@@ -259,8 +278,25 @@ func (br *DiscordBridge) copyAttachmentToMatrix(intent *appservice.IntentAPI, ur
 				}
 			}
 
+			const attachmentSizeVal = 1
+			ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+			onceErr = br.parallelAttachmentSemaphore.Acquire(ctx, attachmentSizeVal)
+			cancel()
+			if onceErr != nil {
+				br.ZLog.Warn().Err(onceErr).Msg("Failed to acquire semaphore")
+				onceErr = fmt.Errorf("reuploading timed out")
+				return
+			}
+			var semaWg sync.WaitGroup
+			semaWg.Add(1)
+			defer semaWg.Done()
+			go func() {
+				semaWg.Wait()
+				br.parallelAttachmentSemaphore.Release(attachmentSizeVal)
+			}()
+
 			var data []byte
-			data, onceErr = downloadDiscordAttachment(url)
+			data, onceErr = downloadDiscordAttachment(url, br.MediaConfig.UploadSize)
 			if onceErr != nil {
 				return
 			}
@@ -273,7 +309,7 @@ func (br *DiscordBridge) copyAttachmentToMatrix(intent *appservice.IntentAPI, ur
 				}
 			}
 
-			onceDBFile, onceErr = br.uploadMatrixAttachment(intent, data, url, encrypt, meta)
+			onceDBFile, onceErr = br.uploadMatrixAttachment(intent, data, url, encrypt, meta, &semaWg)
 			if onceErr != nil {
 				return
 			}
@@ -288,13 +324,19 @@ func (br *DiscordBridge) copyAttachmentToMatrix(intent *appservice.IntentAPI, ur
 }
 
 func (portal *Portal) getEmojiMXCByDiscordID(emojiID, name string, animated bool) id.ContentURI {
-	var url, mimeType string
+	var url, mimeType, ext string
 	if animated {
 		url = discordgo.EndpointEmojiAnimated(emojiID)
 		mimeType = "image/gif"
+		ext = "gif"
 	} else {
 		url = discordgo.EndpointEmoji(emojiID)
 		mimeType = "image/png"
+		ext = "png"
+	}
+	mxc := portal.bridge.Config.Bridge.MediaPatterns.Emoji(emojiID, ext)
+	if !mxc.IsEmpty() {
+		return mxc
 	}
 	dbFile, err := portal.bridge.copyAttachmentToMatrix(portal.MainIntent(), url, false, AttachmentMeta{
 		AttachmentID: emojiID,
@@ -302,7 +344,7 @@ func (portal *Portal) getEmojiMXCByDiscordID(emojiID, name string, animated bool
 		EmojiName:    name,
 	})
 	if err != nil {
-		portal.log.Warnfln("Failed to download emoji %s from discord: %v", emojiID, err)
+		portal.log.Warn().Err(err).Str("emoji_id", emojiID).Msg("Failed to copy emoji to Matrix")
 		return id.ContentURI{}
 	}
 	return dbFile.MXC

avatar.go

@@ -1,40 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"io"
-	"net/http"
-
-	"maunium.net/go/mautrix/appservice"
-	"maunium.net/go/mautrix/id"
-
-	"github.com/bwmarrin/discordgo"
-)
-
-func uploadAvatar(intent *appservice.IntentAPI, url string) (id.ContentURI, error) {
-	req, err := http.NewRequest(http.MethodGet, url, nil)
-	if err != nil {
-		return id.ContentURI{}, fmt.Errorf("failed to prepare request: %w", err)
-	}
-	for key, value := range discordgo.DroidImageHeaders {
-		req.Header.Set(key, value)
-	}
-	getResp, err := http.DefaultClient.Do(req)
-	if err != nil {
-		return id.ContentURI{}, fmt.Errorf("failed to download avatar: %w", err)
-	}
-
-	data, err := io.ReadAll(getResp.Body)
-	_ = getResp.Body.Close()
-	if err != nil {
-		return id.ContentURI{}, fmt.Errorf("failed to read avatar data: %w", err)
-	}
-
-	mime := http.DetectContentType(data)
-	resp, err := intent.UploadBytes(data, mime)
-	if err != nil {
-		return id.ContentURI{}, fmt.Errorf("failed to upload avatar to Matrix: %w", err)
-	}
-
-	return resp.ContentURI, nil
-}

backfill.go

@@ -0,0 +1,380 @@
+package main
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/base64"
+	"fmt"
+	"sort"
+
+	"github.com/bwmarrin/discordgo"
+	"github.com/rs/zerolog"
+	"maunium.net/go/mautrix"
+	"maunium.net/go/mautrix/event"
+	"maunium.net/go/mautrix/id"
+
+	"go.mau.fi/mautrix-discord/database"
+)
+
+func (portal *Portal) forwardBackfillInitial(source *User, thread *Thread) {
+	log := portal.log
+	defer func() {
+		log.Debug().Msg("Forward backfill finished, unlocking lock")
+		portal.forwardBackfillLock.Unlock()
+	}()
+	// This should only be called from CreateMatrixRoom which locks forwardBackfillLock before creating the room.
+	if portal.forwardBackfillLock.TryLock() {
+		panic("forwardBackfillInitial() called without locking forwardBackfillLock")
+	}
+
+	limit := portal.bridge.Config.Bridge.Backfill.Limits.Initial.Channel
+	if portal.GuildID == "" {
+		limit = portal.bridge.Config.Bridge.Backfill.Limits.Initial.DM
+		if thread != nil {
+			limit = portal.bridge.Config.Bridge.Backfill.Limits.Initial.Thread
+			thread.initialBackfillAttempted = true
+		}
+	}
+	if limit == 0 {
+		return
+	}
+
+	with := log.With().
+		Str("action", "initial backfill").
+		Str("room_id", portal.MXID.String()).
+		Int("limit", limit)
+	if thread != nil {
+		with = with.Str("thread_id", thread.ID)
+	}
+	log = with.Logger()
+
+	portal.backfillLimited(log, source, limit, "", thread)
+}
+
+func (portal *Portal) ForwardBackfillMissed(source *User, serverLastMessageID string, thread *Thread) {
+	if portal.MXID == "" {
+		return
+	}
+
+	limit := portal.bridge.Config.Bridge.Backfill.Limits.Missed.Channel
+	if portal.GuildID == "" {
+		limit = portal.bridge.Config.Bridge.Backfill.Limits.Missed.DM
+		if thread != nil {
+			limit = portal.bridge.Config.Bridge.Backfill.Limits.Missed.Thread
+		}
+	}
+	if limit == 0 {
+		return
+	}
+	with := portal.log.With().
+		Str("action", "missed event backfill").
+		Str("room_id", portal.MXID.String()).
+		Int("limit", limit)
+	if thread != nil {
+		with = with.Str("thread_id", thread.ID)
+	}
+	log := with.Logger()
+
+	portal.forwardBackfillLock.Lock()
+	defer portal.forwardBackfillLock.Unlock()
+
+	var lastMessage *database.Message
+	if thread != nil {
+		lastMessage = portal.bridge.DB.Message.GetLastInThread(portal.Key, thread.ID)
+	} else {
+		lastMessage = portal.bridge.DB.Message.GetLast(portal.Key)
+	}
+	if lastMessage == nil || serverLastMessageID == "" {
+		log.Debug().Msg("Not backfilling, no last message in database or no last message in metadata")
+		return
+	} else if !shouldBackfill(lastMessage.DiscordID, serverLastMessageID) {
+		log.Debug().
+			Str("last_bridged_message", lastMessage.DiscordID).
+			Str("last_server_message", serverLastMessageID).
+			Msg("Not backfilling, last message in database is newer than last message in metadata")
+		return
+	}
+	log.Debug().
+		Str("last_bridged_message", lastMessage.DiscordID).
+		Str("last_server_message", serverLastMessageID).
+		Msg("Backfilling missed messages")
+	if limit < 0 {
+		portal.backfillUnlimitedMissed(log, source, lastMessage.DiscordID, thread)
+	} else {
+		portal.backfillLimited(log, source, limit, lastMessage.DiscordID, thread)
+	}
+}
+
+const messageFetchChunkSize = 50
+
+func (portal *Portal) collectBackfillMessages(log zerolog.Logger, source *User, limit int, until string, thread *Thread) ([]*discordgo.Message, bool, error) {
+	var messages []*discordgo.Message
+	var before string
+	var foundAll bool
+	protoChannelID := portal.Key.ChannelID
+	if thread != nil {
+		protoChannelID = thread.ID
+	}
+	for {
+		log.Debug().Str("before_id", before).Msg("Fetching messages for backfill")
+		newMessages, err := source.Session.ChannelMessages(protoChannelID, messageFetchChunkSize, before, "", "")
+		if err != nil {
+			return nil, false, err
+		}
+		if until != "" {
+			for i, msg := range newMessages {
+				if compareMessageIDs(msg.ID, until) <= 0 {
+					log.Debug().
+						Str("message_id", msg.ID).
+						Str("until_id", until).
+						Msg("Found message that was already bridged")
+					newMessages = newMessages[:i]
+					foundAll = true
+					break
+				}
+			}
+		}
+		messages = append(messages, newMessages...)
+		log.Debug().Int("count", len(newMessages)).Msg("Added messages to backfill collection")
+		if len(newMessages) < messageFetchChunkSize || len(messages) >= limit {
+			break
+		}
+		before = newMessages[len(newMessages)-1].ID
+	}
+	if len(messages) > limit {
+		foundAll = false
+		messages = messages[:limit]
+	}
+	return messages, foundAll, nil
+}
+
+func (portal *Portal) backfillLimited(log zerolog.Logger, source *User, limit int, after string, thread *Thread) {
+	messages, foundAll, err := portal.collectBackfillMessages(log, source, limit, after, thread)
+	if err != nil {
+		log.Err(err).Msg("Error collecting messages to forward backfill")
+		return
+	}
+	log.Info().
+		Int("count", len(messages)).
+		Bool("found_all", foundAll).
+		Msg("Collected messages to backfill")
+	sort.Sort(MessageSlice(messages))
+	if !foundAll && after != "" {
+		_, err = portal.sendMatrixMessage(portal.MainIntent(), event.EventMessage, &event.MessageEventContent{
+			MsgType: event.MsgNotice,
+			Body:    "Some messages may have been missed here while the bridge was offline.",
+		}, nil, 0)
+		if err != nil {
+			log.Warn().Err(err).Msg("Failed to send missed message warning")
+		} else {
+			log.Debug().Msg("Sent warning about possibly missed messages")
+		}
+	}
+	portal.sendBackfillBatch(log, source, messages, thread)
+}
+
+func (portal *Portal) backfillUnlimitedMissed(log zerolog.Logger, source *User, after string, thread *Thread) {
+	protoChannelID := portal.Key.ChannelID
+	if thread != nil {
+		protoChannelID = thread.ID
+	}
+	for {
+		log.Debug().Str("after_id", after).Msg("Fetching chunk of messages to backfill")
+		messages, err := source.Session.ChannelMessages(protoChannelID, messageFetchChunkSize, "", after, "")
+		if err != nil {
+			log.Err(err).Msg("Error fetching chunk of messages to forward backfill")
+			return
+		}
+		log.Debug().Int("count", len(messages)).Msg("Fetched chunk of messages to backfill")
+		sort.Sort(MessageSlice(messages))
+
+		portal.sendBackfillBatch(log, source, messages, thread)
+
+		if len(messages) < messageFetchChunkSize {
+			// Assume that was all the missing messages
+			log.Debug().Msg("Chunk had less than 50 messages, stopping backfill")
+			return
+		}
+		after = messages[len(messages)-1].ID
+	}
+}
+
+func (portal *Portal) sendBackfillBatch(log zerolog.Logger, source *User, messages []*discordgo.Message, thread *Thread) {
+	if portal.bridge.SpecVersions.Supports(mautrix.BeeperFeatureBatchSending) {
+		log.Debug().Msg("Using hungryserv, sending messages with batch send endpoint")
+		portal.forwardBatchSend(log, source, messages, thread)
+	} else {
+		log.Debug().Msg("Not using hungryserv, sending messages one by one")
+		for _, msg := range messages {
+			portal.handleDiscordMessageCreate(source, msg, thread)
+		}
+	}
+}
+
+func (portal *Portal) forwardBatchSend(log zerolog.Logger, source *User, messages []*discordgo.Message, thread *Thread) {
+	evts, metas, dbMessages := portal.convertMessageBatch(log, source, messages, thread)
+	if len(evts) == 0 {
+		log.Warn().Msg("Didn't get any events to backfill")
+		return
+	}
+	log.Info().Int("events", len(evts)).Msg("Converted messages to backfill")
+	resp, err := portal.MainIntent().BeeperBatchSend(portal.MXID, &mautrix.ReqBeeperBatchSend{
+		Forward: true,
+		Events:  evts,
+	})
+	if err != nil {
+		log.Err(err).Msg("Error sending backfill batch")
+		return
+	}
+	for i, evtID := range resp.EventIDs {
+		dbMessages[i].MXID = evtID
+		if metas[i] != nil && metas[i].Flags == discordgo.MessageFlagsHasThread {
+			// TODO proper context
+			ctx := log.WithContext(context.Background())
+			portal.bridge.threadFound(ctx, source, &dbMessages[i], metas[i].ID, metas[i].Thread)
+		}
+	}
+	portal.bridge.DB.Message.MassInsert(portal.Key, dbMessages)
+}
+
+func (portal *Portal) convertMessageBatch(log zerolog.Logger, source *User, messages []*discordgo.Message, thread *Thread) ([]*event.Event, []*discordgo.Message, []database.Message) {
+	var discordThreadID string
+	var threadRootEvent, lastThreadEvent id.EventID
+	if thread != nil {
+		discordThreadID = thread.ID
+		threadRootEvent = thread.RootMXID
+		lastThreadEvent = threadRootEvent
+		lastInThread := portal.bridge.DB.Message.GetLastInThread(portal.Key, thread.ID)
+		if lastInThread != nil {
+			lastThreadEvent = lastInThread.MXID
+		}
+	}
+
+	evts := make([]*event.Event, 0, len(messages))
+	dbMessages := make([]database.Message, 0, len(messages))
+	metas := make([]*discordgo.Message, 0, len(messages))
+	ctx := context.Background()
+	for _, msg := range messages {
+		for _, mention := range msg.Mentions {
+			puppet := portal.bridge.GetPuppetByID(mention.ID)
+			puppet.UpdateInfo(nil, mention, nil)
+		}
+
+		puppet := portal.bridge.GetPuppetByID(msg.Author.ID)
+		puppet.UpdateInfo(source, msg.Author, msg)
+		intent := puppet.IntentFor(portal)
+		replyTo := portal.getReplyTarget(source, discordThreadID, msg.MessageReference, msg.Embeds, true)
+		mentions := portal.convertDiscordMentions(msg, false)
+
+		ts, _ := discordgo.SnowflakeTimestamp(msg.ID)
+		log := log.With().
+			Str("message_id", msg.ID).
+			Int("message_type", int(msg.Type)).
+			Str("author_id", msg.Author.ID).
+			Logger()
+		parts := portal.convertDiscordMessage(log.WithContext(ctx), puppet, intent, msg)
+		for i, part := range parts {
+			if (replyTo != nil || threadRootEvent != "") && part.Content.RelatesTo == nil {
+				part.Content.RelatesTo = &event.RelatesTo{}
+			}
+			if threadRootEvent != "" {
+				part.Content.RelatesTo.SetThread(threadRootEvent, lastThreadEvent)
+			}
+			if replyTo != nil {
+				part.Content.RelatesTo.SetReplyTo(replyTo.EventID)
+				// Only set reply for first event
+				replyTo = nil
+			}
+
+			part.Content.Mentions = mentions
+			// Only set mentions for first event, but keep empty object for rest
+			mentions = &event.Mentions{}
+
+			partName := part.AttachmentID
+			// Always use blank part name for first part so that replies and other things
+			// can reference it without knowing about attachments.
+			if i == 0 {
+				partName = ""
+			}
+			evt := &event.Event{
+				ID:        portal.deterministicEventID(msg.ID, partName),
+				Type:      part.Type,
+				Sender:    intent.UserID,
+				Timestamp: ts.UnixMilli(),
+				Content: event.Content{
+					Parsed: part.Content,
+					Raw:    part.Extra,
+				},
+			}
+			var err error
+			evt.Type, err = portal.encrypt(intent, &evt.Content, evt.Type)
+			if err != nil {
+				log.Err(err).Msg("Failed to encrypt event")
+				continue
+			}
+			intent.AddDoublePuppetValue(&evt.Content)
+			evts = append(evts, evt)
+			dbMessages = append(dbMessages, database.Message{
+				Channel:      portal.Key,
+				DiscordID:    msg.ID,
+				SenderID:     msg.Author.ID,
+				Timestamp:    ts,
+				AttachmentID: part.AttachmentID,
+				SenderMXID:   intent.UserID,
+			})
+			if i == 0 {
+				metas = append(metas, msg)
+			} else {
+				metas = append(metas, nil)
+			}
+			lastThreadEvent = evt.ID
+		}
+	}
+	return evts, metas, dbMessages
+}
+
+func (portal *Portal) deterministicEventID(messageID, partName string) id.EventID {
+	data := fmt.Sprintf("%s/discord/%s/%s", portal.MXID, messageID, partName)
+	sum := sha256.Sum256([]byte(data))
+	return id.EventID(fmt.Sprintf("$%s:discord.com", base64.RawURLEncoding.EncodeToString(sum[:])))
+}
+
+// compareMessageIDs compares two Discord message IDs.
+//
+// If the first ID is lower, -1 is returned.
+// If the second ID is lower, 1 is returned.
+// If the IDs are equal, 0 is returned.
+func compareMessageIDs(id1, id2 string) int {
+	if id1 == id2 {
+		return 0
+	}
+	if len(id1) < len(id2) {
+		return -1
+	} else if len(id2) < len(id1) {
+		return 1
+	}
+	if id1 < id2 {
+		return -1
+	}
+	return 1
+}
+
+func shouldBackfill(latestBridgedIDStr, latestIDFromServerStr string) bool {
+	return compareMessageIDs(latestBridgedIDStr, latestIDFromServerStr) == -1
+}
+
+type MessageSlice []*discordgo.Message
+
+var _ sort.Interface = (MessageSlice)(nil)
+
+func (a MessageSlice) Len() int {
+	return len(a)
+}
+
+func (a MessageSlice) Swap(i, j int) {
+	a[i], a[j] = a[j], a[i]
+}
+
+func (a MessageSlice) Less(i, j int) bool {
+	return compareMessageIDs(a[i].ID, a[j].ID) == -1
+}

commands.go

@@ -371,10 +371,10 @@ func fnRejoinSpace(ce *WrappedCommandEvent) {
 	}
 	user := ce.User
 	if ce.Args[0] == "main" {
-		user.ensureInvited(nil, user.GetSpaceRoom(), false)
+		user.ensureInvited(nil, user.GetSpaceRoom(), false, true)
 		ce.Reply("Invited you to your main space ([link](%s))", user.GetSpaceRoom().URI(ce.Bridge.AS.HomeserverDomain).MatrixToURL())
 	} else if ce.Args[0] == "dms" {
-		user.ensureInvited(nil, user.GetDMSpaceRoom(), false)
+		user.ensureInvited(nil, user.GetDMSpaceRoom(), false, true)
 		ce.Reply("Invited you to your DM space ([link](%s))", user.GetDMSpaceRoom().URI(ce.Bridge.AS.HomeserverDomain).MatrixToURL())
 	} else if _, err := strconv.Atoi(ce.Args[0]); err == nil {
 		ce.Reply("Rejoining guild spaces is not yet implemented")

config/bridge.go

@@ -25,6 +25,7 @@ import (
 	"github.com/bwmarrin/discordgo"
 
 	"maunium.net/go/mautrix/bridge/bridgeconfig"
+	"maunium.net/go/mautrix/id"
 )
 
 type BridgeConfig struct {
@@ -32,7 +33,7 @@ type BridgeConfig struct {
 	DisplaynameTemplate       string `yaml:"displayname_template"`
 	ChannelNameTemplate       string `yaml:"channel_name_template"`
 	GuildNameTemplate         string `yaml:"guild_name_template"`
-	PrivateChatPortalMeta     bool   `yaml:"private_chat_portal_meta"`
+	PrivateChatPortalMeta     string `yaml:"private_chat_portal_meta"`
 	PrivateChannelCreateLimit int    `yaml:"startup_private_channel_create_limit"`
 
 	PortalMessageBuffer int `yaml:"portal_message_buffer"`
@@ -50,7 +51,14 @@ type BridgeConfig struct {
 	DeletePortalOnChannelDelete bool `yaml:"delete_portal_on_channel_delete"`
 	DeleteGuildOnLeave          bool `yaml:"delete_guild_on_leave"`
 	FederateRooms               bool `yaml:"federate_rooms"`
-	AnimatedSticker             struct {
+	PrefixWebhookMessages       bool `yaml:"prefix_webhook_messages"`
+	EnableWebhookAvatars        bool `yaml:"enable_webhook_avatars"`
+	UseDiscordCDNUpload         bool `yaml:"use_discord_cdn_upload"`
+
+	CacheMedia    string        `yaml:"cache_media"`
+	MediaPatterns MediaPatterns `yaml:"media_patterns"`
+
+	AnimatedSticker struct {
 		Target string `yaml:"target"`
 		Args   struct {
 			Width  int `yaml:"width"`
@@ -66,6 +74,14 @@ type BridgeConfig struct {
 	CommandPrefix      string                           `yaml:"command_prefix"`
 	ManagementRoomText bridgeconfig.ManagementRoomTexts `yaml:"management_room_text"`
 
+	Backfill struct {
+		Limits struct {
+			Initial BackfillLimitPart `yaml:"initial"`
+			Missed  BackfillLimitPart `yaml:"missed"`
+		} `yaml:"forward_limits"`
+		MaxGuildMembers int `yaml:"max_guild_members"`
+	} `yaml:"backfill"`
+
 	Encryption bridgeconfig.EncryptionConfig `yaml:"encryption"`
 
 	Provisioning struct {
@@ -81,6 +97,119 @@ type BridgeConfig struct {
 	guildNameTemplate   *template.Template `yaml:"-"`
 }
 
+type MediaPatterns struct {
+	Enabled        bool   `yaml:"enabled"`
+	TplAttachments string `yaml:"attachments"`
+	TplEmojis      string `yaml:"emojis"`
+	TplStickers    string `yaml:"stickers"`
+	TplAvatars     string `yaml:"avatars"`
+
+	attachments *template.Template `yaml:"-"`
+	emojis      *template.Template `yaml:"-"`
+	stickers    *template.Template `yaml:"-"`
+	avatars     *template.Template `yaml:"-"`
+}
+
+type umMediaPatterns MediaPatterns
+
+func (mp *MediaPatterns) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	err := unmarshal((*umMediaPatterns)(mp))
+	if err != nil {
+		return err
+	}
+	tpl := template.New("media_patterns")
+
+	pairs := []struct {
+		ptr      **template.Template
+		name     string
+		template string
+	}{
+		{&mp.attachments, "attachments", mp.TplAttachments},
+		{&mp.emojis, "emojis", mp.TplEmojis},
+		{&mp.stickers, "stickers", mp.TplStickers},
+		{&mp.avatars, "avatars", mp.TplAvatars},
+	}
+	for _, pair := range pairs {
+		if pair.template == "" {
+			continue
+		}
+		*pair.ptr, err = tpl.New(pair.name).Parse(pair.template)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+type attachmentParams struct {
+	ChannelID    string
+	AttachmentID string
+	FileName     string
+}
+
+type emojiStickerParams struct {
+	ID  string
+	Ext string
+}
+
+type avatarParams struct {
+	UserID   string
+	AvatarID string
+	Ext      string
+}
+
+func (mp *MediaPatterns) execute(tpl *template.Template, params any) id.ContentURI {
+	if tpl == nil || !mp.Enabled {
+		return id.ContentURI{}
+	}
+	var out strings.Builder
+	err := tpl.Execute(&out, params)
+	if err != nil {
+		panic(err)
+	}
+	uri, err := id.ParseContentURI(out.String())
+	if err != nil {
+		panic(err)
+	}
+	return uri
+}
+
+func (mp *MediaPatterns) Attachment(channelID, attachmentID, filename string) id.ContentURI {
+	return mp.execute(mp.attachments, attachmentParams{
+		ChannelID:    channelID,
+		AttachmentID: attachmentID,
+		FileName:     filename,
+	})
+}
+
+func (mp *MediaPatterns) Emoji(emojiID, ext string) id.ContentURI {
+	return mp.execute(mp.emojis, emojiStickerParams{
+		ID:  emojiID,
+		Ext: ext,
+	})
+}
+
+func (mp *MediaPatterns) Sticker(stickerID, ext string) id.ContentURI {
+	return mp.execute(mp.stickers, emojiStickerParams{
+		ID:  stickerID,
+		Ext: ext,
+	})
+}
+
+func (mp *MediaPatterns) Avatar(userID, avatarID, ext string) id.ContentURI {
+	return mp.execute(mp.avatars, avatarParams{
+		UserID:   userID,
+		AvatarID: avatarID,
+		Ext:      ext,
+	})
+}
+
+type BackfillLimitPart struct {
+	DM      int `yaml:"dm"`
+	Channel int `yaml:"channel"`
+	Thread  int `yaml:"thread"`
+}
+
 func (bc *BridgeConfig) GetResendBridgeInfo() bool {
 	return bc.ResendBridgeInfo
 }
@@ -161,9 +290,19 @@ func (bc BridgeConfig) FormatUsername(userID string) string {
 	return buffer.String()
 }
 
-func (bc BridgeConfig) FormatDisplayname(user *discordgo.User) string {
+type DisplaynameParams struct {
+	*discordgo.User
+	Webhook     bool
+	Application bool
+}
+
+func (bc BridgeConfig) FormatDisplayname(user *discordgo.User, webhook, application bool) string {
 	var buffer strings.Builder
-	_ = bc.displaynameTemplate.Execute(&buffer, user)
+	_ = bc.displaynameTemplate.Execute(&buffer, &DisplaynameParams{
+		User:        user,
+		Webhook:     webhook,
+		Application: application,
+	})
 	return buffer.String()
 }
 

config/upgrade.go

@@ -1,5 +1,5 @@
 // mautrix-discord - A Matrix-Discord puppeting bridge.
-// Copyright (C) 2022 Tulir Asokan
+// Copyright (C) 2023 Tulir Asokan
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by
@@ -31,7 +31,15 @@ func DoUpgrade(helper *up.Helper) {
 	helper.Copy(up.Str, "bridge", "displayname_template")
 	helper.Copy(up.Str, "bridge", "channel_name_template")
 	helper.Copy(up.Str, "bridge", "guild_name_template")
-	helper.Copy(up.Bool, "bridge", "private_chat_portal_meta")
+	if legacyPrivateChatPortalMeta, ok := helper.Get(up.Bool, "bridge", "private_chat_portal_meta"); ok {
+		updatedPrivateChatPortalMeta := "default"
+		if legacyPrivateChatPortalMeta == "true" {
+			updatedPrivateChatPortalMeta = "always"
+		}
+		helper.Set(up.Str, updatedPrivateChatPortalMeta, "bridge", "private_chat_portal_meta")
+	} else {
+		helper.Copy(up.Str, "bridge", "private_chat_portal_meta")
+	}
 	helper.Copy(up.Int, "bridge", "startup_private_channel_create_limit")
 	helper.Copy(up.Int, "bridge", "portal_message_buffer")
 	helper.Copy(up.Bool, "bridge", "delivery_receipts")
@@ -47,6 +55,15 @@ func DoUpgrade(helper *up.Helper) {
 	helper.Copy(up.Bool, "bridge", "delete_portal_on_channel_delete")
 	helper.Copy(up.Bool, "bridge", "delete_guild_on_leave")
 	helper.Copy(up.Bool, "bridge", "federate_rooms")
+	helper.Copy(up.Bool, "bridge", "prefix_webhook_messages")
+	helper.Copy(up.Bool, "bridge", "enable_webhook_avatars")
+	helper.Copy(up.Bool, "bridge", "use_discord_cdn_upload")
+	helper.Copy(up.Bool, "bridge", "media_patterns", "enabled")
+	helper.Copy(up.Str, "bridge", "cache_media")
+	helper.Copy(up.Str|up.Null, "bridge", "media_patterns", "attachments")
+	helper.Copy(up.Str|up.Null, "bridge", "media_patterns", "emojis")
+	helper.Copy(up.Str|up.Null, "bridge", "media_patterns", "stickers")
+	helper.Copy(up.Str|up.Null, "bridge", "media_patterns", "avatars")
 	helper.Copy(up.Str, "bridge", "animated_sticker", "target")
 	helper.Copy(up.Int, "bridge", "animated_sticker", "args", "width")
 	helper.Copy(up.Int, "bridge", "animated_sticker", "args", "height")
@@ -59,17 +76,35 @@ func DoUpgrade(helper *up.Helper) {
 	helper.Copy(up.Str, "bridge", "management_room_text", "welcome_connected")
 	helper.Copy(up.Str, "bridge", "management_room_text", "welcome_unconnected")
 	helper.Copy(up.Str|up.Null, "bridge", "management_room_text", "additional_help")
+	helper.Copy(up.Bool, "bridge", "backfill", "enabled")
+	helper.Copy(up.Int, "bridge", "backfill", "forward_limits", "initial", "dm")
+	helper.Copy(up.Int, "bridge", "backfill", "forward_limits", "initial", "channel")
+	helper.Copy(up.Int, "bridge", "backfill", "forward_limits", "initial", "thread")
+	helper.Copy(up.Int, "bridge", "backfill", "forward_limits", "missed", "dm")
+	helper.Copy(up.Int, "bridge", "backfill", "forward_limits", "missed", "channel")
+	helper.Copy(up.Int, "bridge", "backfill", "forward_limits", "missed", "thread")
+	helper.Copy(up.Int, "bridge", "backfill", "max_guild_members")
 	helper.Copy(up.Bool, "bridge", "encryption", "allow")
 	helper.Copy(up.Bool, "bridge", "encryption", "default")
 	helper.Copy(up.Bool, "bridge", "encryption", "require")
 	helper.Copy(up.Bool, "bridge", "encryption", "appservice")
 	helper.Copy(up.Bool, "bridge", "encryption", "allow_key_sharing")
+	helper.Copy(up.Bool, "bridge", "encryption", "plaintext_mentions")
+	helper.Copy(up.Bool, "bridge", "encryption", "delete_keys", "delete_outbound_on_ack")
+	helper.Copy(up.Bool, "bridge", "encryption", "delete_keys", "dont_store_outbound")
+	helper.Copy(up.Bool, "bridge", "encryption", "delete_keys", "ratchet_on_decrypt")
+	helper.Copy(up.Bool, "bridge", "encryption", "delete_keys", "delete_fully_used_on_decrypt")
+	helper.Copy(up.Bool, "bridge", "encryption", "delete_keys", "delete_prev_on_new_session")
+	helper.Copy(up.Bool, "bridge", "encryption", "delete_keys", "delete_on_device_delete")
+	helper.Copy(up.Bool, "bridge", "encryption", "delete_keys", "periodically_delete_expired")
+	helper.Copy(up.Bool, "bridge", "encryption", "delete_keys", "delete_outdated_inbound")
 	helper.Copy(up.Str, "bridge", "encryption", "verification_levels", "receive")
 	helper.Copy(up.Str, "bridge", "encryption", "verification_levels", "send")
 	helper.Copy(up.Str, "bridge", "encryption", "verification_levels", "share")
 	helper.Copy(up.Bool, "bridge", "encryption", "rotation", "enable_custom")
 	helper.Copy(up.Int, "bridge", "encryption", "rotation", "milliseconds")
 	helper.Copy(up.Int, "bridge", "encryption", "rotation", "messages")
+	helper.Copy(up.Bool, "bridge", "encryption", "rotation", "disable_device_change_key_rotation")
 
 	helper.Copy(up.Str, "bridge", "provisioning", "prefix")
 	if secret, ok := helper.Get(up.Str, "bridge", "provisioning", "shared_secret"); !ok || secret == "generate" {

database/database.go

@@ -68,9 +68,10 @@ func New(baseDB *dbutil.Database, log maulogger.Logger) *Database {
 	return db
 }
 
-func strPtr(val string) *string {
+func strPtr[T ~string](val T) *string {
 	if val == "" {
 		return nil
 	}
-	return &val
+	valStr := string(val)
+	return &valStr
 }

database/file.go

@@ -39,8 +39,8 @@ func (fq *FileQuery) Get(url string, encrypted bool) *File {
 	return fq.New().Scan(fq.db.QueryRow(query, url, encrypted))
 }
 
-func (fq *FileQuery) GetByMXC(mxc id.ContentURI) *File {
+func (fq *FileQuery) GetEmojiByMXC(mxc id.ContentURI) *File {
-	query := fileSelect + " WHERE mxc=$1"
+	query := fileSelect + " WHERE mxc=$1 AND emoji_name<>'' LIMIT 1"
 	return fq.New().Scan(fq.db.QueryRow(query, mxc.String()))
 }
 
@@ -79,7 +79,7 @@ func (f *File) Scan(row dbutil.Scannable) *File {
 	}
 	f.ID = fileID.String
 	f.EmojiName = emojiName.String
-	f.Timestamp = time.UnixMilli(timestamp)
+	f.Timestamp = time.UnixMilli(timestamp).UTC()
 	f.Width = int(width.Int32)
 	f.Height = int(height.Int32)
 	f.MXC, err = id.ParseContentURI(mxc)

database/message.go

@@ -19,7 +19,7 @@ type MessageQuery struct {
 }
 
 const (
-	messageSelect = "SELECT dcid, dc_attachment_id, dc_edit_index, dc_chan_id, dc_chan_receiver, dc_sender, timestamp, dc_thread_id, mxid FROM message"
+	messageSelect = "SELECT dcid, dc_attachment_id, dc_chan_id, dc_chan_receiver, dc_sender, timestamp, dc_edit_timestamp, dc_thread_id, mxid, sender_mxid FROM message"
 )
 
 func (mq *MessageQuery) New() *Message {
@@ -46,17 +46,17 @@ func (mq *MessageQuery) scanAll(rows dbutil.Rows, err error) []*Message {
 }
 
 func (mq *MessageQuery) GetByDiscordID(key PortalKey, discordID string) []*Message {
-	query := messageSelect + " WHERE dc_chan_id=$1 AND dc_chan_receiver=$2 AND dcid=$3 AND dc_edit_index=0 ORDER BY dc_attachment_id ASC"
+	query := messageSelect + " WHERE dc_chan_id=$1 AND dc_chan_receiver=$2 AND dcid=$3 ORDER BY dc_attachment_id ASC"
 	return mq.scanAll(mq.db.Query(query, key.ChannelID, key.Receiver, discordID))
 }
 
 func (mq *MessageQuery) GetFirstByDiscordID(key PortalKey, discordID string) *Message {
-	query := messageSelect + " WHERE dc_chan_id=$1 AND dc_chan_receiver=$2 AND dcid=$3 AND dc_edit_index=0 ORDER BY dc_attachment_id ASC LIMIT 1"
+	query := messageSelect + " WHERE dc_chan_id=$1 AND dc_chan_receiver=$2 AND dcid=$3 ORDER BY dc_attachment_id ASC LIMIT 1"
 	return mq.New().Scan(mq.db.QueryRow(query, key.ChannelID, key.Receiver, discordID))
 }
 
 func (mq *MessageQuery) GetLastByDiscordID(key PortalKey, discordID string) *Message {
-	query := messageSelect + " WHERE dc_chan_id=$1 AND dc_chan_receiver=$2 AND dcid=$3 AND dc_edit_index=0 ORDER BY dc_attachment_id DESC LIMIT 1"
+	query := messageSelect + " WHERE dc_chan_id=$1 AND dc_chan_receiver=$2 AND dcid=$3 ORDER BY dc_attachment_id DESC LIMIT 1"
 	return mq.New().Scan(mq.db.QueryRow(query, key.ChannelID, key.Receiver, discordID))
 }
 
@@ -66,10 +66,15 @@ func (mq *MessageQuery) GetClosestBefore(key PortalKey, threadID string, ts time
 }
 
 func (mq *MessageQuery) GetLastInThread(key PortalKey, threadID string) *Message {
-	query := messageSelect + " WHERE dc_chan_id=$1 AND dc_chan_receiver=$2 AND dc_thread_id=$3 AND dc_edit_index=0 ORDER BY timestamp DESC, dc_attachment_id DESC LIMIT 1"
+	query := messageSelect + " WHERE dc_chan_id=$1 AND dc_chan_receiver=$2 AND dc_thread_id=$3 ORDER BY timestamp DESC, dc_attachment_id DESC LIMIT 1"
 	return mq.New().Scan(mq.db.QueryRow(query, key.ChannelID, key.Receiver, threadID))
 }
 
+func (mq *MessageQuery) GetLast(key PortalKey) *Message {
+	query := messageSelect + " WHERE dc_chan_id=$1 AND dc_chan_receiver=$2 ORDER BY timestamp DESC LIMIT 1"
+	return mq.New().Scan(mq.db.QueryRow(query, key.ChannelID, key.Receiver))
+}
+
 func (mq *MessageQuery) DeleteAll(key PortalKey) {
 	query := "DELETE FROM message WHERE dc_chan_id=$1 AND dc_chan_receiver=$2"
 	_, err := mq.db.Exec(query, key.ChannelID, key.Receiver)
@@ -90,19 +95,51 @@ func (mq *MessageQuery) GetByMXID(key PortalKey, mxid id.EventID) *Message {
 	return mq.New().Scan(row)
 }
 
+func (mq *MessageQuery) MassInsert(key PortalKey, msgs []Message) {
+	if len(msgs) == 0 {
+		return
+	}
+	valueStringFormat := "($%d, $%d, $1, $2, $%d, $%d, $%d, $%d, $%d, $%d)"
+	if mq.db.Dialect == dbutil.SQLite {
+		valueStringFormat = strings.ReplaceAll(valueStringFormat, "$", "?")
+	}
+	params := make([]interface{}, 2+len(msgs)*8)
+	placeholders := make([]string, len(msgs))
+	params[0] = key.ChannelID
+	params[1] = key.Receiver
+	for i, msg := range msgs {
+		baseIndex := 2 + i*7
+		params[baseIndex] = msg.DiscordID
+		params[baseIndex+1] = msg.AttachmentID
+		params[baseIndex+2] = msg.SenderID
+		params[baseIndex+3] = msg.Timestamp.UnixMilli()
+		params[baseIndex+4] = msg.editTimestampVal()
+		params[baseIndex+5] = msg.ThreadID
+		params[baseIndex+6] = msg.MXID
+		params[baseIndex+7] = msg.SenderMXID.String()
+		placeholders[i] = fmt.Sprintf(valueStringFormat, baseIndex+1, baseIndex+2, baseIndex+3, baseIndex+4, baseIndex+5, baseIndex+6, baseIndex+7, baseIndex+8)
+	}
+	_, err := mq.db.Exec(fmt.Sprintf(messageMassInsertTemplate, strings.Join(placeholders, ", ")), params...)
+	if err != nil {
+		mq.log.Warnfln("Failed to insert %d messages: %v", len(msgs), err)
+		panic(err)
+	}
+}
+
 type Message struct {
 	db  *Database
 	log log.Logger
 
-	DiscordID    string
+	DiscordID     string
-	AttachmentID string
+	AttachmentID  string
-	EditIndex    int
+	Channel       PortalKey
-	Channel      PortalKey
+	SenderID      string
-	SenderID     string
+	Timestamp     time.Time
-	Timestamp    time.Time
+	EditTimestamp time.Time
-	ThreadID     string
+	ThreadID      string
 
-	MXID id.EventID
+	MXID       id.EventID
+	SenderMXID id.UserID
 }
 
 func (m *Message) DiscordProtoChannelID() string {
@@ -114,9 +151,9 @@ func (m *Message) DiscordProtoChannelID() string {
 }
 
 func (m *Message) Scan(row dbutil.Scannable) *Message {
-	var ts int64
+	var ts, editTS int64
 
-	err := row.Scan(&m.DiscordID, &m.AttachmentID, &m.EditIndex, &m.Channel.ChannelID, &m.Channel.Receiver, &m.SenderID, &ts, &m.ThreadID, &m.MXID)
+	err := row.Scan(&m.DiscordID, &m.AttachmentID, &m.Channel.ChannelID, &m.Channel.Receiver, &m.SenderID, &ts, &editTS, &m.ThreadID, &m.MXID, &m.SenderMXID)
 	if err != nil {
 		if !errors.Is(err, sql.ErrNoRows) {
 			m.log.Errorln("Database scan failed:", err)
@@ -127,7 +164,10 @@ func (m *Message) Scan(row dbutil.Scannable) *Message {
 	}
 
 	if ts != 0 {
-		m.Timestamp = time.UnixMilli(ts)
+		m.Timestamp = time.UnixMilli(ts).UTC()
+	}
+	if editTS != 0 {
+		m.EditTimestamp = time.Unix(0, editTS).UTC()
 	}
 
 	return m
@@ -135,39 +175,47 @@ func (m *Message) Scan(row dbutil.Scannable) *Message {
 
 const messageInsertQuery = `
 	INSERT INTO message (
-		dcid, dc_attachment_id, dc_edit_index, dc_chan_id, dc_chan_receiver, dc_sender, timestamp, dc_thread_id, mxid
+		dcid, dc_attachment_id, dc_chan_id, dc_chan_receiver, dc_sender, timestamp, dc_edit_timestamp, dc_thread_id, mxid, sender_mxid
 	)
-	VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
+	VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
 `
 
-var messageMassInsertTemplate = strings.Replace(messageInsertQuery, "($1, $2, $3, $4, $5, $6, $7, $8, $9)", "%s", 1)
+var messageMassInsertTemplate = strings.Replace(messageInsertQuery, "($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)", "%s", 1)
 
 type MessagePart struct {
 	AttachmentID string
 	MXID         id.EventID
 }
 
-func (m *Message) MassInsert(msgs []MessagePart) {
+func (m *Message) editTimestampVal() int64 {
+	if m.EditTimestamp.IsZero() {
+		return 0
+	}
+	return m.EditTimestamp.UnixNano()
+}
+
+func (m *Message) MassInsertParts(msgs []MessagePart) {
 	if len(msgs) == 0 {
 		return
 	}
-	valueStringFormat := "($1, $%d, $2, $3, $4, $5, $6, $7, $%d)"
+	valueStringFormat := "($1, $%d, $2, $3, $4, $5, $6, $7, $%d, $8)"
 	if m.db.Dialect == dbutil.SQLite {
 		valueStringFormat = strings.ReplaceAll(valueStringFormat, "$", "?")
 	}
-	params := make([]interface{}, 7+len(msgs)*2)
+	params := make([]interface{}, 8+len(msgs)*2)
 	placeholders := make([]string, len(msgs))
 	params[0] = m.DiscordID
-	params[1] = m.EditIndex
+	params[1] = m.Channel.ChannelID
-	params[2] = m.Channel.ChannelID
+	params[2] = m.Channel.Receiver
-	params[3] = m.Channel.Receiver
+	params[3] = m.SenderID
-	params[4] = m.SenderID
+	params[4] = m.Timestamp.UnixMilli()
-	params[5] = m.Timestamp.UnixMilli()
+	params[5] = m.editTimestampVal()
 	params[6] = m.ThreadID
+	params[7] = m.SenderMXID.String()
 	for i, msg := range msgs {
-		params[7+i*2] = msg.AttachmentID
+		params[8+i*2] = msg.AttachmentID
-		params[7+i*2+1] = msg.MXID
+		params[8+i*2+1] = msg.MXID
-		placeholders[i] = fmt.Sprintf(valueStringFormat, 7+i*2+1, 7+i*2+2)
+		placeholders[i] = fmt.Sprintf(valueStringFormat, 8+i*2+1, 8+i*2+2)
 	}
 	_, err := m.db.Exec(fmt.Sprintf(messageMassInsertTemplate, strings.Join(placeholders, ", ")), params...)
 	if err != nil {
@@ -178,8 +226,8 @@ func (m *Message) MassInsert(msgs []MessagePart) {
 
 func (m *Message) Insert() {
 	_, err := m.db.Exec(messageInsertQuery,
-		m.DiscordID, m.AttachmentID, m.EditIndex, m.Channel.ChannelID, m.Channel.Receiver, m.SenderID,
+		m.DiscordID, m.AttachmentID, m.Channel.ChannelID, m.Channel.Receiver, m.SenderID,
-		m.Timestamp.UnixMilli(), m.ThreadID, m.MXID)
+		m.Timestamp.UnixMilli(), m.editTimestampVal(), m.ThreadID, m.MXID, m.SenderMXID.String())
 
 	if err != nil {
 		m.log.Warnfln("Failed to insert %s@%s: %v", m.DiscordID, m.Channel, err)
@@ -187,6 +235,20 @@ func (m *Message) Insert() {
 	}
 }
 
+const editUpdateQuery = `
+	UPDATE message
+	SET dc_edit_timestamp=$1
+	WHERE dcid=$2 AND dc_attachment_id=$3 AND dc_chan_id=$4 AND dc_chan_receiver=$5 AND dc_edit_timestamp<$1
+`
+
+func (m *Message) UpdateEditTimestamp(ts time.Time) {
+	_, err := m.db.Exec(editUpdateQuery, ts.UnixNano(), m.DiscordID, m.AttachmentID, m.Channel.ChannelID, m.Channel.Receiver)
+	if err != nil {
+		m.log.Warnfln("Failed to update edit timestamp of %s@%s: %v", m.DiscordID, m.Channel, err)
+		panic(err)
+	}
+}
+
 func (m *Message) Delete() {
 	query := "DELETE FROM message WHERE dcid=$1 AND dc_chan_id=$2 AND dc_chan_receiver=$3 AND dc_attachment_id=$4"
 	_, err := m.db.Exec(query, m.DiscordID, m.Channel.ChannelID, m.Channel.Receiver, m.AttachmentID)

database/portal.go

@@ -15,7 +15,7 @@ import (
 const (
 	portalSelect = `
 		SELECT dcid, receiver, type, other_user_id, dc_guild_id, dc_parent_id, mxid,
-		       plain_name, name, name_set, topic, topic_set, avatar, avatar_url, avatar_set,
+		       plain_name, name, name_set, friend_nick, topic, topic_set, avatar, avatar_url, avatar_set,
 		       encrypted, in_space, first_event_id, relay_webhook_id, relay_webhook_secret
 		FROM portal
 	`
@@ -68,6 +68,10 @@ func (pq *PortalQuery) GetByMXID(mxid id.RoomID) *Portal {
 	return pq.get(portalSelect+" WHERE mxid=$1", mxid)
 }
 
+func (pq *PortalQuery) FindPrivateChatBetween(id, receiver string) *Portal {
+	return pq.get(portalSelect+" WHERE other_user_id=$1 AND receiver=$2 AND type=$3", id, receiver, discordgo.ChannelTypeDM)
+}
+
 func (pq *PortalQuery) FindPrivateChatsWith(id string) []*Portal {
 	return pq.getAll(portalSelect+" WHERE other_user_id=$1 AND type=$2", id, discordgo.ChannelTypeDM)
 }
@@ -109,16 +113,17 @@ type Portal struct {
 
 	MXID id.RoomID
 
-	PlainName string
+	PlainName  string
-	Name      string
+	Name       string
-	NameSet   bool
+	NameSet    bool
-	Topic     string
+	FriendNick bool
-	TopicSet  bool
+	Topic      string
-	Avatar    string
+	TopicSet   bool
-	AvatarURL id.ContentURI
+	Avatar     string
-	AvatarSet bool
+	AvatarURL  id.ContentURI
-	Encrypted bool
+	AvatarSet  bool
-	InSpace   id.RoomID
+	Encrypted  bool
+	InSpace    id.RoomID
 
 	FirstEventID id.EventID
 
@@ -132,7 +137,7 @@ func (p *Portal) Scan(row dbutil.Scannable) *Portal {
 	var avatarURL string
 
 	err := row.Scan(&p.Key.ChannelID, &p.Key.Receiver, &chanType, &otherUserID, &guildID, &parentID,
-		&mxid, &p.PlainName, &p.Name, &p.NameSet, &p.Topic, &p.TopicSet, &p.Avatar, &avatarURL, &p.AvatarSet,
+		&mxid, &p.PlainName, &p.Name, &p.NameSet, &p.FriendNick, &p.Topic, &p.TopicSet, &p.Avatar, &avatarURL, &p.AvatarSet,
 		&p.Encrypted, &p.InSpace, &firstEventID, &relayWebhookID, &relayWebhookSecret)
 
 	if err != nil {
@@ -160,13 +165,13 @@ func (p *Portal) Scan(row dbutil.Scannable) *Portal {
 func (p *Portal) Insert() {
 	query := `
 		INSERT INTO portal (dcid, receiver, type, other_user_id, dc_guild_id, dc_parent_id, mxid,
-		                    plain_name, name, name_set, topic, topic_set, avatar, avatar_url, avatar_set,
+		                    plain_name, name, name_set, friend_nick, topic, topic_set, avatar, avatar_url, avatar_set,
 		                    encrypted, in_space, first_event_id, relay_webhook_id, relay_webhook_secret)
-		VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20)
+		VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21)
 	`
 	_, err := p.db.Exec(query, p.Key.ChannelID, p.Key.Receiver, p.Type,
 		strPtr(p.OtherUserID), strPtr(p.GuildID), strPtr(p.ParentID), strPtr(string(p.MXID)),
-		p.PlainName, p.Name, p.NameSet, p.Topic, p.TopicSet, p.Avatar, p.AvatarURL.String(), p.AvatarSet,
+		p.PlainName, p.Name, p.NameSet, p.FriendNick, p.Topic, p.TopicSet, p.Avatar, p.AvatarURL.String(), p.AvatarSet,
 		p.Encrypted, p.InSpace, p.FirstEventID.String(), strPtr(p.RelayWebhookID), strPtr(p.RelayWebhookSecret))
 
 	if err != nil {
@@ -179,14 +184,16 @@ func (p *Portal) Update() {
 	query := `
 		UPDATE portal
 		SET type=$1, other_user_id=$2, dc_guild_id=$3, dc_parent_id=$4, mxid=$5,
-			plain_name=$6, name=$7, name_set=$8, topic=$9, topic_set=$10, avatar=$11, avatar_url=$12, avatar_set=$13,
+			plain_name=$6, name=$7, name_set=$8, friend_nick=$9, topic=$10, topic_set=$11,
-			encrypted=$14, in_space=$15, first_event_id=$16, relay_webhook_id=$17, relay_webhook_secret=$18
+			avatar=$12, avatar_url=$13, avatar_set=$14, encrypted=$15, in_space=$16, first_event_id=$17,
-		WHERE dcid=$19 AND receiver=$20
+			relay_webhook_id=$18, relay_webhook_secret=$19
+		WHERE dcid=$20 AND receiver=$21
 	`
 	_, err := p.db.Exec(query,
 		p.Type, strPtr(p.OtherUserID), strPtr(p.GuildID), strPtr(p.ParentID), strPtr(string(p.MXID)),
-		p.PlainName, p.Name, p.NameSet, p.Topic, p.TopicSet, p.Avatar, p.AvatarURL.String(), p.AvatarSet,
+		p.PlainName, p.Name, p.NameSet, p.FriendNick, p.Topic, p.TopicSet,
-		p.Encrypted, p.InSpace, p.FirstEventID.String(), strPtr(p.RelayWebhookID), strPtr(p.RelayWebhookSecret),
+		p.Avatar, p.AvatarURL.String(), p.AvatarSet, p.Encrypted, p.InSpace, p.FirstEventID.String(),
+		strPtr(p.RelayWebhookID), strPtr(p.RelayWebhookSecret),
 		p.Key.ChannelID, p.Key.Receiver)
 
 	if err != nil {

database/puppet.go

@@ -11,7 +11,7 @@ import (
 
 const (
 	puppetSelect = "SELECT id, name, name_set, avatar, avatar_url, avatar_set," +
-		" custom_mxid, access_token, next_batch" +
+		" contact_info_set, global_name, username, discriminator, is_bot, is_webhook, is_application, custom_mxid, access_token, next_batch" +
 		" FROM puppet "
 )
 
@@ -73,6 +73,15 @@ type Puppet struct {
 	AvatarURL id.ContentURI
 	AvatarSet bool
 
+	ContactInfoSet bool
+
+	GlobalName    string
+	Username      string
+	Discriminator string
+	IsBot         bool
+	IsWebhook     bool
+	IsApplication bool
+
 	CustomMXID  id.UserID
 	AccessToken string
 	NextBatch   string
@@ -82,8 +91,8 @@ func (p *Puppet) Scan(row dbutil.Scannable) *Puppet {
 	var avatarURL string
 	var customMXID, accessToken, nextBatch sql.NullString
 
-	err := row.Scan(&p.ID, &p.Name, &p.NameSet, &p.Avatar, &avatarURL, &p.AvatarSet,
+	err := row.Scan(&p.ID, &p.Name, &p.NameSet, &p.Avatar, &avatarURL, &p.AvatarSet, &p.ContactInfoSet,
-		&customMXID, &accessToken, &nextBatch)
+		&p.GlobalName, &p.Username, &p.Discriminator, &p.IsBot, &p.IsWebhook, &p.IsApplication, &customMXID, &accessToken, &nextBatch)
 
 	if err != nil {
 		if err != sql.ErrNoRows {
@@ -104,11 +113,16 @@ func (p *Puppet) Scan(row dbutil.Scannable) *Puppet {
 
 func (p *Puppet) Insert() {
 	query := `
-		INSERT INTO puppet (id, name, name_set, avatar, avatar_url, avatar_set, custom_mxid, access_token, next_batch)
+		INSERT INTO puppet (
-		VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
+			id, name, name_set, avatar, avatar_url, avatar_set, contact_info_set,
+			global_name, username, discriminator, is_bot, is_webhook, is_application,
+			custom_mxid, access_token, next_batch
+		)
+		VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16)
 	`
-	_, err := p.db.Exec(query, p.ID, p.Name, p.NameSet, p.Avatar, p.AvatarURL.String(), p.AvatarSet,
+	_, err := p.db.Exec(query, p.ID, p.Name, p.NameSet, p.Avatar, p.AvatarURL.String(), p.AvatarSet, p.ContactInfoSet,
-		strPtr(string(p.CustomMXID)), strPtr(p.AccessToken), strPtr(p.NextBatch))
+		p.GlobalName, p.Username, p.Discriminator, p.IsBot, p.IsWebhook, p.IsApplication,
+		strPtr(p.CustomMXID), strPtr(p.AccessToken), strPtr(p.NextBatch))
 
 	if err != nil {
 		p.log.Warnfln("Failed to insert %s: %v", p.ID, err)
@@ -118,13 +132,18 @@ func (p *Puppet) Insert() {
 
 func (p *Puppet) Update() {
 	query := `
-		UPDATE puppet SET name=$1, name_set=$2, avatar=$3, avatar_url=$4, avatar_set=$5,
+		UPDATE puppet SET name=$1, name_set=$2, avatar=$3, avatar_url=$4, avatar_set=$5, contact_info_set=$6,
-		                  custom_mxid=$6, access_token=$7, next_batch=$8
+		                  global_name=$7, username=$8, discriminator=$9, is_bot=$10, is_webhook=$11, is_application=$12,
-		WHERE id=$9
+		                  custom_mxid=$13, access_token=$14, next_batch=$15
+		WHERE id=$16
 	`
-	_, err := p.db.Exec(query, p.Name, p.NameSet, p.Avatar, p.AvatarURL.String(), p.AvatarSet,
+	_, err := p.db.Exec(
-		strPtr(string(p.CustomMXID)), strPtr(p.AccessToken), strPtr(p.NextBatch),
+		query,
-		p.ID)
+		p.Name, p.NameSet, p.Avatar, p.AvatarURL.String(), p.AvatarSet, p.ContactInfoSet,
+		p.GlobalName, p.Username, p.Discriminator, p.IsBot, p.IsWebhook, p.IsApplication,
+		strPtr(p.CustomMXID), strPtr(p.AccessToken), strPtr(p.NextBatch),
+		p.ID,
+	)
 
 	if err != nil {
 		p.log.Warnfln("Failed to update %s: %v", p.ID, err)

database/upgrades/00-latest-revision.sql

@@ -1,4 +1,4 @@
--- v0 -> v15: Latest revision
+-- v0 -> v23 (compatible with v19+): Latest revision
 
 CREATE TABLE guild (
     dcid       TEXT PRIMARY KEY,
@@ -29,6 +29,7 @@ CREATE TABLE portal (
     plain_name TEXT NOT NULL,
     name       TEXT NOT NULL,
     name_set   BOOLEAN NOT NULL,
+    friend_nick BOOLEAN NOT NULL,
     topic      TEXT NOT NULL,
     topic_set  BOOLEAN NOT NULL,
     avatar     TEXT NOT NULL,
@@ -62,11 +63,20 @@ CREATE TABLE thread (
 CREATE TABLE puppet (
     id TEXT PRIMARY KEY,
 
-    name       TEXT NOT NULL,
+    name             TEXT NOT NULL,
-    name_set   BOOLEAN NOT NULL,
+    name_set         BOOLEAN NOT NULL DEFAULT false,
-    avatar     TEXT NOT NULL,
+    avatar           TEXT NOT NULL,
-    avatar_url TEXT NOT NULL,
+    avatar_url       TEXT NOT NULL,
-    avatar_set BOOLEAN NOT NULL,
+    avatar_set       BOOLEAN NOT NULL DEFAULT false,
+
+    contact_info_set BOOLEAN NOT NULL DEFAULT false,
+
+    global_name    TEXT NOT NULL DEFAULT '',
+    username       TEXT NOT NULL DEFAULT '',
+    discriminator  TEXT NOT NULL DEFAULT '',
+    is_bot         BOOLEAN NOT NULL DEFAULT false,
+    is_webhook     BOOLEAN NOT NULL DEFAULT false,
+    is_application BOOLEAN NOT NULL DEFAULT false,
 
     custom_mxid  TEXT,
     access_token TEXT,
@@ -97,18 +107,19 @@ CREATE TABLE user_portal (
 );
 
 CREATE TABLE message (
-    dcid             TEXT,
+    dcid              TEXT,
-    dc_attachment_id TEXT,
+    dc_attachment_id  TEXT,
-    dc_edit_index    INTEGER,
+    dc_chan_id        TEXT,
-    dc_chan_id       TEXT,
+    dc_chan_receiver  TEXT,
-    dc_chan_receiver TEXT,
+    dc_sender         TEXT   NOT NULL,
-    dc_sender        TEXT   NOT NULL,
+    timestamp         BIGINT NOT NULL,
-    timestamp        BIGINT NOT NULL,
+    dc_edit_timestamp BIGINT NOT NULL,
-    dc_thread_id     TEXT   NOT NULL,
+    dc_thread_id      TEXT   NOT NULL,
 
-    mxid TEXT NOT NULL UNIQUE,
+    mxid        TEXT NOT NULL UNIQUE,
+    sender_mxid TEXT NOT NULL DEFAULT '',
 
-    PRIMARY KEY (dcid, dc_attachment_id, dc_edit_index, dc_chan_id, dc_chan_receiver),
+    PRIMARY KEY (dcid, dc_attachment_id, dc_chan_id, dc_chan_receiver),
     CONSTRAINT message_portal_fkey FOREIGN KEY (dc_chan_id, dc_chan_receiver) REFERENCES portal (dcid, receiver) ON DELETE CASCADE
 );
 
@@ -120,13 +131,12 @@ CREATE TABLE reaction (
     dc_emoji_name    TEXT,
     dc_thread_id     TEXT NOT NULL,
 
-    dc_first_attachment_id TEXT    NOT NULL,
+    dc_first_attachment_id TEXT NOT NULL,
-    _dc_first_edit_index   INTEGER NOT NULL DEFAULT 0,
 
     mxid TEXT NOT NULL UNIQUE,
 
     PRIMARY KEY (dc_chan_id, dc_chan_receiver, dc_msg_id, dc_sender, dc_emoji_name),
-    CONSTRAINT reaction_message_fkey FOREIGN KEY (dc_msg_id, dc_first_attachment_id, _dc_first_edit_index, dc_chan_id, dc_chan_receiver) REFERENCES message (dcid, dc_attachment_id, dc_edit_index, dc_chan_id, dc_chan_receiver) ON DELETE CASCADE
+    CONSTRAINT reaction_message_fkey FOREIGN KEY (dc_msg_id, dc_first_attachment_id, dc_chan_id, dc_chan_receiver) REFERENCES message (dcid, dc_attachment_id, dc_chan_id, dc_chan_receiver) ON DELETE CASCADE
 );
 
 CREATE TABLE role (
@@ -151,7 +161,7 @@ CREATE TABLE role (
 CREATE TABLE discord_file (
     url       TEXT,
     encrypted BOOLEAN,
-    mxc       TEXT NOT NULL UNIQUE,
+    mxc       TEXT NOT NULL,
 
     id         TEXT,
     emoji_name TEXT,
@@ -165,3 +175,5 @@ CREATE TABLE discord_file (
 
     PRIMARY KEY (url, encrypted)
 );
+
+CREATE INDEX discord_file_mxc_idx ON discord_file (mxc);

database/upgrades/16-add-contact-info.sql

@@ -0,0 +1,3 @@
+-- v16: Store whether custom contact info has been set for the puppet
+
+ALTER TABLE puppet ADD COLUMN contact_info_set BOOLEAN NOT NULL DEFAULT false;

database/upgrades/17-dm-portal-friend-nick.sql

@@ -0,0 +1,2 @@
+-- v17: Store whether DM portal name is a friend nickname
+ALTER TABLE portal ADD COLUMN friend_nick BOOLEAN NOT NULL DEFAULT false;

database/upgrades/18-extra-ghost-metadata.sql

@@ -0,0 +1,4 @@
+-- v18 (compatible with v15+): Store additional metadata for ghosts
+ALTER TABLE puppet ADD COLUMN username TEXT NOT NULL DEFAULT '';
+ALTER TABLE puppet ADD COLUMN discriminator TEXT NOT NULL DEFAULT '';
+ALTER TABLE puppet ADD COLUMN is_bot BOOLEAN NOT NULL DEFAULT false;

database/upgrades/19-message-edit-ts.postgres.sql

@@ -0,0 +1,15 @@
+-- v19: Replace dc_edit_index with dc_edit_timestamp
+-- transaction: off
+BEGIN;
+
+ALTER TABLE reaction DROP CONSTRAINT reaction_message_fkey;
+ALTER TABLE message DROP CONSTRAINT message_pkey;
+ALTER TABLE message DROP COLUMN dc_edit_index;
+ALTER TABLE reaction DROP COLUMN _dc_first_edit_index;
+ALTER TABLE message ADD PRIMARY KEY (dcid, dc_attachment_id, dc_chan_id, dc_chan_receiver);
+ALTER TABLE reaction ADD CONSTRAINT reaction_message_fkey FOREIGN KEY (dc_msg_id, dc_first_attachment_id, dc_chan_id, dc_chan_receiver) REFERENCES message (dcid, dc_attachment_id, dc_chan_id, dc_chan_receiver) ON DELETE CASCADE;
+
+ALTER TABLE message ADD COLUMN dc_edit_timestamp BIGINT NOT NULL DEFAULT 0;
+ALTER TABLE message ALTER COLUMN dc_edit_timestamp DROP DEFAULT;
+
+COMMIT;

database/upgrades/19-message-edit-ts.sqlite.sql

@@ -0,0 +1,48 @@
+-- v19: Replace dc_edit_index with dc_edit_timestamp
+-- transaction: off
+PRAGMA foreign_keys = OFF;
+BEGIN;
+
+CREATE TABLE message_new (
+    dcid              TEXT,
+    dc_attachment_id  TEXT,
+    dc_chan_id        TEXT,
+    dc_chan_receiver  TEXT,
+    dc_sender         TEXT   NOT NULL,
+    timestamp         BIGINT NOT NULL,
+    dc_edit_timestamp BIGINT NOT NULL,
+    dc_thread_id      TEXT   NOT NULL,
+
+    mxid TEXT NOT NULL UNIQUE,
+
+    PRIMARY KEY (dcid, dc_attachment_id, dc_chan_id, dc_chan_receiver),
+    CONSTRAINT message_portal_fkey FOREIGN KEY (dc_chan_id, dc_chan_receiver) REFERENCES portal (dcid, receiver) ON DELETE CASCADE
+);
+INSERT INTO message_new (dcid, dc_attachment_id, dc_chan_id, dc_chan_receiver, dc_sender, timestamp, dc_edit_timestamp, dc_thread_id, mxid)
+    SELECT dcid, dc_attachment_id, dc_chan_id, dc_chan_receiver, dc_sender, timestamp, 0, dc_thread_id, mxid FROM message;
+DROP TABLE message;
+ALTER TABLE message_new RENAME TO message;
+
+CREATE TABLE reaction_new (
+    dc_chan_id       TEXT,
+    dc_chan_receiver TEXT,
+    dc_msg_id        TEXT,
+    dc_sender        TEXT,
+    dc_emoji_name    TEXT,
+    dc_thread_id     TEXT NOT NULL,
+
+    dc_first_attachment_id TEXT NOT NULL,
+
+    mxid TEXT NOT NULL UNIQUE,
+
+    PRIMARY KEY (dc_chan_id, dc_chan_receiver, dc_msg_id, dc_sender, dc_emoji_name),
+    CONSTRAINT reaction_message_fkey FOREIGN KEY (dc_msg_id, dc_first_attachment_id, dc_chan_id, dc_chan_receiver) REFERENCES message (dcid, dc_attachment_id, dc_chan_id, dc_chan_receiver) ON DELETE CASCADE
+);
+INSERT INTO reaction_new (dc_chan_id, dc_chan_receiver, dc_msg_id, dc_sender, dc_emoji_name, dc_thread_id, dc_first_attachment_id, mxid)
+    SELECT dc_chan_id, dc_chan_receiver, dc_msg_id, dc_sender, dc_emoji_name, COALESCE(dc_thread_id, ''), dc_first_attachment_id, mxid FROM reaction;
+DROP TABLE reaction;
+ALTER TABLE reaction_new RENAME TO reaction;
+
+PRAGMA foreign_key_check;
+COMMIT;
+PRAGMA foreign_keys = ON;

database/upgrades/20-message-sender-mxid.sql

@@ -0,0 +1,2 @@
+-- v20 (compatible with v19+): Store message sender Matrix user ID
+ALTER TABLE message ADD COLUMN sender_mxid TEXT NOT NULL DEFAULT '';

database/upgrades/21-more-puppet-info.sql

@@ -0,0 +1,3 @@
+-- v21 (compatible with v19+): Store global displayname and is webhook status for puppets
+ALTER TABLE puppet ADD COLUMN global_name TEXT NOT NULL DEFAULT '';
+ALTER TABLE puppet ADD COLUMN is_webhook BOOLEAN NOT NULL DEFAULT false;

database/upgrades/22-file-cache-duplicate-mxc.sql

@@ -0,0 +1,26 @@
+-- v22 (compatible with v19+): Allow non-unique mxc URIs in file cache
+CREATE TABLE new_discord_file (
+    url       TEXT,
+    encrypted BOOLEAN,
+    mxc       TEXT NOT NULL,
+
+    id         TEXT,
+    emoji_name TEXT,
+
+    size            BIGINT NOT NULL,
+    width           INTEGER,
+    height          INTEGER,
+    mime_type       TEXT NOT NULL,
+    decryption_info jsonb,
+    timestamp       BIGINT NOT NULL,
+
+    PRIMARY KEY (url, encrypted)
+);
+
+INSERT INTO new_discord_file (url, encrypted, mxc, id, emoji_name, size, width, height, mime_type, decryption_info, timestamp)
+SELECT url, encrypted, mxc, id, emoji_name, size, width, height, mime_type, decryption_info, timestamp FROM discord_file;
+
+DROP TABLE discord_file;
+ALTER TABLE new_discord_file RENAME TO discord_file;
+
+CREATE INDEX discord_file_mxc_idx ON discord_file (mxc);

database/upgrades/23-puppet-is-application.sql

@@ -0,0 +1,2 @@
+-- v23 (compatible with v19+): Store is application status for puppets
+ALTER TABLE puppet ADD COLUMN is_application BOOLEAN NOT NULL DEFAULT false;

database/userportal.go

@@ -29,7 +29,7 @@ func (up UserPortal) Scan(l log.Logger, row dbutil.Scannable) *UserPortal {
 		l.Errorln("Error scanning user portal:", err)
 		panic(err)
 	}
-	up.Timestamp = time.UnixMilli(ts)
+	up.Timestamp = time.UnixMilli(ts).UTC()
 	return &up
 }
 

example-config.yaml

@@ -20,6 +20,13 @@ homeserver:
     # Does the homeserver support https://github.com/matrix-org/matrix-spec-proposals/pull/2246?
     async_media: false
 
+    # Should the bridge use a websocket for connecting to the homeserver?
+    # The server side is currently not documented anywhere and is only implemented by mautrix-wsproxy,
+    # mautrix-asmux (deprecated), and hungryserv (proprietary).
+    websocket: false
+    # How often should the websocket be pinged? Pinging will be disabled if this is zero.
+    ping_interval_seconds: 0
+
 # Application service host/registration related details.
 # Changing these values requires regeneration of the registration.
 appservice:
@@ -80,11 +87,14 @@ bridge:
     # Displayname template for Discord users. This is also used as the room name in DMs if private_chat_portal_meta is enabled.
     # Available variables:
     #   .ID - Internal user ID
-    #   .Username - User's displayname on Discord
+    #   .Username - Legacy display/username on Discord
+    #   .GlobalName - New displayname on Discord
     #   .Discriminator - The 4 numbers after the name on Discord
     #   .Bot - Whether the user is a bot
     #   .System - Whether the user is an official system user
-    displayname_template: '{{.Username}}#{{.Discriminator}}{{if .Bot}} (bot){{end}}'
+    #   .Webhook - Whether the user is a webhook and is not an application
+    #   .Application - Whether the user is an application
+    displayname_template: '{{or .GlobalName .Username}}{{if .Bot}} (bot){{end}}'
     # Displayname template for Discord channels (bridged as rooms, or spaces when type=4).
     # Available variables:
     #   .Name - Channel name, or user displayname (pre-formatted with displayname_template) in DMs.
@@ -97,9 +107,11 @@ bridge:
     # Available variables:
     #   .Name - Guild name
     guild_name_template: '{{.Name}}'
-    # Should the bridge explicitly set the avatar and room name for DM portal rooms?
+    # Whether to explicitly set the avatar and room name for private chat portal rooms.
-    # This is implicitly enabled in encrypted rooms.
+    # If set to `default`, this will be enabled in encrypted rooms and disabled in unencrypted rooms.
-    private_chat_portal_meta: false
+    # If set to `always`, all DM rooms will have explicit names and avatars set.
+    # If set to `never`, DM rooms will never have names and avatars set.
+    private_chat_portal_meta: default
 
     portal_message_buffer: 128
 
@@ -143,6 +155,33 @@ bridge:
     # Whether or not created rooms should have federation enabled.
     # If false, created portal rooms will never be federated.
     federate_rooms: true
+    # Prefix messages from webhooks with the profile info? This can be used along with a custom displayname_template
+    # to better handle webhooks that change their name all the time (like ones used by bridges).
+    prefix_webhook_messages: false
+    # Bridge webhook avatars?
+    enable_webhook_avatars: true
+    # Should the bridge upload media to the Discord CDN directly before sending the message when using a user token,
+    # like the official client does? The other option is sending the media in the message send request as a form part
+    # (which is always used by bots and webhooks).
+    use_discord_cdn_upload: true
+    # Should mxc uris copied from Discord be cached?
+    # This can be `never` to never cache, `unencrypted` to only cache unencrypted mxc uris, or `always` to cache everything.
+    # If you have a media repo that generates non-unique mxc uris, you should set this to never.
+    cache_media: unencrypted
+    # Patterns for converting Discord media to custom mxc:// URIs instead of reuploading.
+    # Each of the patterns can be set to null to disable custom URIs for that type of media.
+    # More details can be found at https://docs.mau.fi/bridges/go/discord/direct-media.html
+    media_patterns:
+        # Should custom mxc:// URIs be used instead of reuploading media?
+        enabled: false
+        # Pattern for normal message attachments.
+        attachments: mxc://discord-media.mau.dev/attachments|{{.ChannelID}}|{{.AttachmentID}}|{{.FileName}}
+        # Pattern for custom emojis.
+        emojis: mxc://discord-media.mau.dev/emojis|{{.ID}}.{{.Ext}}
+        # Pattern for stickers. Note that animated lottie stickers will not be converted if this is enabled.
+        stickers: mxc://discord-media.mau.dev/stickers|{{.ID}}.{{.Ext}}
+        # Pattern for static user avatars.
+        avatars: mxc://discord-media.mau.dev/avatars|{{.UserID}}|{{.AvatarID}}.{{.Ext}}
     # Settings for converting animated stickers.
     animated_sticker:
         # Format to which animated stickers should be converted.
@@ -184,6 +223,30 @@ bridge:
         # Optional extra text sent when joining a management room.
         additional_help: ""
 
+    # Settings for backfilling messages.
+    backfill:
+        # Limits for forward backfilling.
+        forward_limits:
+            # Initial backfill (when creating portal). 0 means backfill is disabled.
+            # A special unlimited value is not supported, you must set a limit. Initial backfill will
+            # fetch all messages first before backfilling anything, so high limits can take a lot of time.
+            initial:
+                dm: 0
+                channel: 0
+                thread: 0
+            # Missed message backfill (on startup).
+            # 0 means backfill is disabled, -1 means fetch all messages since last bridged message.
+            # When using unlimited backfill (-1), messages are backfilled as they are fetched.
+            # With limits, all messages up to the limit are fetched first and backfilled afterwards.
+            missed:
+                dm: 0
+                channel: 0
+                thread: 0
+        # Maximum members in a guild to enable backfilling. Set to -1 to disable limit.
+        # This can be used as a rough heuristic to disable backfilling in channels that are too active.
+        # Currently only applies to missed message backfill.
+        max_guild_members: -1
+
     # End-to-bridge encryption support options.
     #
     # See https://docs.mau.fi/bridges/general/end-to-bridge-encryption.html for more info.
@@ -200,6 +263,29 @@ bridge:
         # Enable key sharing? If enabled, key requests for rooms where users are in will be fulfilled.
         # You must use a client that supports requesting keys from other users to use this feature.
         allow_key_sharing: false
+        # Should users mentions be in the event wire content to enable the server to send push notifications?
+        plaintext_mentions: false
+        # Options for deleting megolm sessions from the bridge.
+        delete_keys:
+            # Beeper-specific: delete outbound sessions when hungryserv confirms
+            # that the user has uploaded the key to key backup.
+            delete_outbound_on_ack: false
+            # Don't store outbound sessions in the inbound table.
+            dont_store_outbound: false
+            # Ratchet megolm sessions forward after decrypting messages.
+            ratchet_on_decrypt: false
+            # Delete fully used keys (index >= max_messages) after decrypting messages.
+            delete_fully_used_on_decrypt: false
+            # Delete previous megolm sessions from same device when receiving a new one.
+            delete_prev_on_new_session: false
+            # Delete megolm sessions received from a device when the device is deleted.
+            delete_on_device_delete: false
+            # Periodically delete megolm sessions when 2x max_age has passed since receiving the session.
+            periodically_delete_expired: false
+            # Delete inbound megolm sessions that don't have the received_at field used for
+            # automatic ratcheting and expired session deletion. This is meant as a migration
+            # to delete old keys prior to the bridge update.
+            delete_outdated_inbound: false
         # What level of device verification should be required from users?
         #
         # Valid levels:
@@ -235,6 +321,10 @@ bridge:
             # default.
             messages: 100
 
+            # Disable rotating keys when a user's devices change?
+            # You should not enable this option unless you understand all the implications.
+            disable_device_change_key_rotation: false
+
     # Settings for provisioning API
     provisioning:
         # Prefix for the provisioning API paths.

formatter.go

@@ -26,6 +26,7 @@ import (
 	"github.com/yuin/goldmark/extension"
 	"github.com/yuin/goldmark/parser"
 	"github.com/yuin/goldmark/util"
+	"golang.org/x/exp/slices"
 
 	"maunium.net/go/mautrix/event"
 	"maunium.net/go/mautrix/format"
@@ -58,7 +59,7 @@ func (b *indentableParagraphParser) CanAcceptIndentedLine() bool {
 
 var removeFeaturesExceptLinks = []any{
 	parser.NewListParser(), parser.NewListItemParser(), parser.NewHTMLBlockParser(), parser.NewRawHTMLParser(),
-	parser.NewSetextHeadingParser(), parser.NewATXHeadingParser(), parser.NewThematicBreakParser(),
+	parser.NewSetextHeadingParser(), parser.NewThematicBreakParser(),
 	parser.NewCodeBlockParser(),
 }
 var removeFeaturesAndLinks = append(removeFeaturesExceptLinks, parser.NewLinkParser())
@@ -93,6 +94,7 @@ func (portal *Portal) renderDiscordMarkdownOnlyHTML(text string, allowInlineLink
 
 const formatterContextPortalKey = "fi.mau.discord.portal"
 const formatterContextAllowedMentionsKey = "fi.mau.discord.allowed_mentions"
+const formatterContextInputAllowedMentionsKey = "fi.mau.discord.input_allowed_mentions"
 
 func appendIfNotContains(arr []string, newItem string) []string {
 	for _, item := range arr {
@@ -135,6 +137,10 @@ func (br *DiscordBridge) pillConverter(displayname, mxid, eventID string, ctx fo
 			}
 		}
 	} else if mxid[0] == '@' {
+		allowedMentions, _ := ctx.ReturnData[formatterContextInputAllowedMentionsKey].([]id.UserID)
+		if allowedMentions != nil && !slices.Contains(allowedMentions, id.UserID(mxid)) {
+			return displayname
+		}
 		mentions := ctx.ReturnData[formatterContextAllowedMentionsKey].(*discordgo.MessageAllowedMentions)
 		parsedID, ok := br.ParsePuppetMXID(id.UserID(mxid))
 		if ok {
@@ -164,6 +170,7 @@ var discordMarkdownEscaper = strings.NewReplacer(
 	"`", "\\`",
 	`|`, `\|`,
 	`<`, `\<`,
+	`#`, `\#`,
 )
 
 func escapeDiscordMarkdown(s string) string {
@@ -219,6 +226,9 @@ func (portal *Portal) parseMatrixHTML(content *event.MessageEventContent) (strin
 		ctx := format.NewContext()
 		ctx.ReturnData[formatterContextPortalKey] = portal
 		ctx.ReturnData[formatterContextAllowedMentionsKey] = allowedMentions
+		if content.Mentions != nil {
+			ctx.ReturnData[formatterContextInputAllowedMentionsKey] = content.Mentions.UserIDs
+		}
 		return variationselector.FullyQualify(matrixHTMLParser.Parse(content.FormattedBody, ctx)), allowedMentions
 	} else {
 		return variationselector.FullyQualify(escapeDiscordMarkdown(content.Body)), allowedMentions

formatter_tag.go

@@ -192,7 +192,7 @@ func (s *discordTagParser) Parse(parent ast.Node, block text.Reader, pc parser.C
 	case strings.HasPrefix(tagName, ":"):
 		return &astDiscordCustomEmoji{name: tagName, astDiscordTag: tag}
 	case strings.HasPrefix(tagName, "a:"):
-		return &astDiscordCustomEmoji{name: tagName[1:], astDiscordTag: tag}
+		return &astDiscordCustomEmoji{name: tagName[1:], astDiscordTag: tag, animated: true}
 	default:
 		return nil
 	}
@@ -263,9 +263,9 @@ func (r *discordTagHTMLRenderer) renderDiscordMention(w util.BufWriter, source [
 	switch node := n.(type) {
 	case *astDiscordUserMention:
 		if user := node.portal.bridge.GetUserByID(strconv.FormatInt(node.id, 10)); user != nil {
-			_, _ = fmt.Fprintf(w, `<a href="https://matrix.to/#/%[1]s">%[1]s</a>`, user.MXID)
+			_, _ = fmt.Fprintf(w, `<a href="%s">%s</a>`, user.MXID.URI().MatrixToURL(), user.MXID)
 		} else if puppet := node.portal.bridge.GetPuppetByID(strconv.FormatInt(node.id, 10)); puppet != nil {
-			_, _ = fmt.Fprintf(w, `<a href="https://matrix.to/#/%s">%s</a>`, puppet.MXID, puppet.Name)
+			_, _ = fmt.Fprintf(w, `<a href="%s">%s</a>`, puppet.MXID.URI().MatrixToURL(), puppet.Name)
 		}
 		return
 	case *astDiscordRoleMention:
@@ -281,7 +281,7 @@ func (r *discordTagHTMLRenderer) renderDiscordMention(w util.BufWriter, source [
 		})
 		if portal != nil {
 			if portal.MXID != "" {
-				_, _ = fmt.Fprintf(w, `<a href="https://matrix.to/#/%s?via=%s">%s</a>`, portal.MXID, portal.bridge.AS.HomeserverDomain, portal.Name)
+				_, _ = fmt.Fprintf(w, `<a href="%s">%s</a>`, portal.MXID.URI(portal.bridge.AS.HomeserverDomain).MatrixToURL(), portal.Name)
 			} else {
 				_, _ = w.WriteString(portal.Name)
 			}
@@ -290,7 +290,11 @@ func (r *discordTagHTMLRenderer) renderDiscordMention(w util.BufWriter, source [
 	case *astDiscordCustomEmoji:
 		reactionMXC := node.portal.getEmojiMXCByDiscordID(strconv.FormatInt(node.id, 10), node.name, node.animated)
 		if !reactionMXC.IsEmpty() {
-			_, _ = fmt.Fprintf(w, `<img data-mx-emoticon src="%[1]s" alt="%[2]s" title="%[2]s" height="32"/>`, reactionMXC.String(), node.name)
+			attrs := "data-mx-emoticon"
+			if node.animated {
+				attrs += " data-mau-animated-emoji"
+			}
+			_, _ = fmt.Fprintf(w, `<img %[3]s src="%[1]s" alt="%[2]s" title="%[2]s" height="32"/>`, reactionMXC.String(), node.name, attrs)
 			return
 		}
 	case *astDiscordTimestamp:
@@ -305,7 +309,7 @@ func (r *discordTagHTMLRenderer) renderDiscordMention(w util.BufWriter, source [
 		const fullDatetimeFormat = "2006-01-02T15:04:05.000-0700"
 		fullRFC := ts.Format(fullDatetimeFormat)
 		fullHumanReadable := ts.Format(discordTimestampStyle('F').Format())
-		_, _ = fmt.Fprintf(w, `<time title="%s" datetime="%s"><strong>%s</strong></time>`, fullHumanReadable, fullRFC, formatted)
+		_, _ = fmt.Fprintf(w, `<time title="%s" datetime="%s" data-discord-style="%c"><strong>%s</strong></time>`, fullHumanReadable, fullRFC, node.style, formatted)
 	}
 	stringifiable, ok := n.(fmt.Stringer)
 	if ok {

go.mod

@@ -8,18 +8,20 @@ require (
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
 	github.com/gorilla/mux v1.8.0
 	github.com/gorilla/websocket v1.5.0
-	github.com/lib/pq v1.10.7
+	github.com/lib/pq v1.10.9
-	github.com/mattn/go-sqlite3 v1.14.16
+	github.com/mattn/go-sqlite3 v1.14.17
-	github.com/rs/zerolog v1.29.0
+	github.com/rs/zerolog v1.29.1
 	github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
-	github.com/stretchr/testify v1.8.2
+	github.com/stretchr/testify v1.8.4
 	github.com/yuin/goldmark v1.5.4
+	golang.org/x/exp v0.0.0-20230713183714-613f0c0eb8a1
+	golang.org/x/sync v0.3.0
 	maunium.net/go/maulogger/v2 v2.4.1
-	maunium.net/go/mautrix v0.15.0
+	maunium.net/go/mautrix v0.15.4
 )
 
 require (
-	github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534 // indirect
+	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/mattn/go-colorable v0.1.12 // indirect
 	github.com/mattn/go-isatty v0.0.14 // indirect
@@ -29,12 +31,12 @@ require (
 	github.com/tidwall/pretty v1.2.0 // indirect
 	github.com/tidwall/sjson v1.2.5 // indirect
 	go.mau.fi/zeroconfig v0.1.2 // indirect
-	golang.org/x/crypto v0.6.0 // indirect
+	golang.org/x/crypto v0.11.0 // indirect
-	golang.org/x/net v0.8.0 // indirect
+	golang.org/x/net v0.12.0 // indirect
-	golang.org/x/sys v0.6.0 // indirect
+	golang.org/x/sys v0.10.0 // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	maunium.net/go/mauflag v1.0.0 // indirect
 )
 
-replace github.com/bwmarrin/discordgo => github.com/beeper/discordgo v0.0.0-20230301201402-cf4c62e5f53d
+replace github.com/bwmarrin/discordgo => github.com/beeper/discordgo v0.0.0-20230620222529-2cb9d9280e37

go.sum

@@ -1,9 +1,8 @@
 github.com/DATA-DOG/go-sqlmock v1.5.0 h1:Shsta01QNfFxHCfpW6YH2STWB0MudeXXEWMr20OEh60=
-github.com/beeper/discordgo v0.0.0-20230301201402-cf4c62e5f53d h1:xo6A9gSSu7mnxIXHBD1EPDyKEQFlI0N8r57Yf0gWiy8=
+github.com/beeper/discordgo v0.0.0-20230620222529-2cb9d9280e37 h1:N0c/439VcoHGc+gL1lb3vUjr6vUbXz+vor7SLnBOhJU=
-github.com/beeper/discordgo v0.0.0-20230301201402-cf4c62e5f53d/go.mod h1:NJZpH+1AfhIcyQsPeuBKsUtYrRnjkyu0kIVMCHkZtRY=
+github.com/beeper/discordgo v0.0.0-20230620222529-2cb9d9280e37/go.mod h1:59+AOzzjmL6onAh62nuLXmn7dJCaC/owDLWbGtjTcFA=
-github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534 h1:rtAn27wIbmOGUs7RIbVgPEjb31ehTVniDwPGXyMxm5U=
+github.com/coreos/go-systemd/v22 v22.5.0 h1:RrqgGjYQKalulkV8NGVIfkXQf6YYmOyiJKk8iXXhfZs=
-github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/gabriel-vasile/mimetype v1.4.2 h1:w5qFW6JKBz9Y393Y4q372O9A7cUSequkh1Q7OhCmWKU=
@@ -13,32 +12,26 @@ github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaU
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
 github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
 github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
-github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc=
 github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
-github.com/lib/pq v1.10.7 h1:p7ZhMD+KsSRozJr34udlUrhboJwWAgCg34+/ZZNvZZw=
+github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
-github.com/lib/pq v1.10.7/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
+github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/mattn/go-colorable v0.1.12 h1:jF+Du6AlPIjs2BiUiQlKOX0rt3SujHxPnksPKZbaA40=
 github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
 github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
 github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
-github.com/mattn/go-sqlite3 v1.14.16 h1:yOQRA0RpS5PFz/oikGwBEqvAWhWg5ufRz4ETLjwpU1Y=
+github.com/mattn/go-sqlite3 v1.14.17 h1:mCRHCLDUBXgpKAqIKsaAaAsrAlbkeomtRFKXh2L6YIM=
-github.com/mattn/go-sqlite3 v1.14.16/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
+github.com/mattn/go-sqlite3 v1.14.17/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rs/xid v1.4.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
-github.com/rs/zerolog v1.29.0 h1:Zes4hju04hjbvkVkOhdl2HpZa+0PmVwigmo8XoORE5w=
+github.com/rs/zerolog v1.29.1 h1:cO+d60CHkknCbvzEWxP0S9K6KqyTjrCNUy1LdQLCGPc=
-github.com/rs/zerolog v1.29.0/go.mod h1:NILgTygv/Uej1ra5XxGf82ZFSLk58MFGAUS2o6usyD0=
+github.com/rs/zerolog v1.29.1/go.mod h1:Le6ESbR7hc+DP6Lt1THiV8CQSdkkNrd3R0XbEgp3ZBU=
 github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e h1:MRM5ITcdelLK2j1vwZ3Je0FKVCfqOLp5zO6trqMLYs0=
 github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e/go.mod h1:XV66xRDqSt+GTGFMVlhk3ULuV0y9ZmzeVGR4mloJI3M=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
-github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/tidwall/gjson v1.14.2/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
 github.com/tidwall/gjson v1.14.4 h1:uo0p8EbA09J7RQaflQ1aBRffTR7xedD2bcIVSYxLnkM=
 github.com/tidwall/gjson v1.14.4/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
@@ -52,30 +45,27 @@ github.com/yuin/goldmark v1.5.4 h1:2uY/xC0roWy8IBEGLgB1ywIoEJFGmRrX21YQcvGZzjU=
 github.com/yuin/goldmark v1.5.4/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 go.mau.fi/zeroconfig v0.1.2 h1:DKOydWnhPMn65GbXZOafgkPm11BvFashZWLct0dGFto=
 go.mau.fi/zeroconfig v0.1.2/go.mod h1:NcSJkf180JT+1IId76PcMuLTNa1CzsFFZ0nBygIQM70=
-golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
+golang.org/x/crypto v0.11.0 h1:6Ewdq3tDic1mg5xRO4milcWCfMVQhI4NkqWWvqejpuA=
-golang.org/x/crypto v0.6.0 h1:qfktjS5LUO+fFKeJXZ+ikTRijMmljikvG68fpMMruSc=
+golang.org/x/crypto v0.11.0/go.mod h1:xgJhtzW8F9jGdVFWZESrid1U1bjeNy4zgy5cRr/CIio=
-golang.org/x/crypto v0.6.0/go.mod h1:OFC/31mSvZgRz0V1QTNCzfAI1aIRzbiufJtkMIlEp58=
+golang.org/x/exp v0.0.0-20230713183714-613f0c0eb8a1 h1:MGwJjxBy0HJshjDNfLsYO8xppfqWlA5ZT9OhtUUhTNw=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/exp v0.0.0-20230713183714-613f0c0eb8a1/go.mod h1:FXUEEKJgO7OQYeo8N01OfiKP8RXMtf6e8aTskBGqWdc=
-golang.org/x/net v0.8.0 h1:Zrh2ngAOFYneWTAIAPethzeaQLuHwhuBkuV6ZiRnUaQ=
+golang.org/x/net v0.12.0 h1:cfawfvKITfUsFCeJIHJrbSxpeu/E81khclypR0GVT50=
-golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
+golang.org/x/net v0.12.0/go.mod h1:zEVYFnQC7m/vmpQFELhcD1EWkZlX69l4oqgmer6hfKA=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
+golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
+golang.org/x/sys v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA=
-golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/natefinch/lumberjack.v2 v2.2.1 h1:bBRl1b0OH9s/DuPhuXpNl+VtCaJXFZ5/uEFST95x9zc=
 gopkg.in/natefinch/lumberjack.v2 v2.2.1/go.mod h1:YD8tP3GAjkrDg1eZH7EGmyESg/lsYskCTPBJVb9jqSc=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 maunium.net/go/mauflag v1.0.0 h1:YiaRc0tEI3toYtJMRIfjP+jklH45uDHtT80nUamyD4M=
 maunium.net/go/mauflag v1.0.0/go.mod h1:nLivPOpTpHnpzEh8jEdSL9UqO9+/KBJFmNRlwKfkPeA=
 maunium.net/go/maulogger/v2 v2.4.1 h1:N7zSdd0mZkB2m2JtFUsiGTQQAdP0YeFWT7YMc80yAL8=
 maunium.net/go/maulogger/v2 v2.4.1/go.mod h1:omPuYwYBILeVQobz8uO3XC8DIRuEb5rXYlQSuqrbCho=
-maunium.net/go/mautrix v0.15.0 h1:gkK9HXc1SSPwY7qOAqchzj2xxYqiOYeee8lr28A2g/o=
+maunium.net/go/mautrix v0.15.4 h1:Ug3n2Mo+9Yb94AjZTWJQSNHmShaksEzZi85EPl3S3P0=
-maunium.net/go/mautrix v0.15.0/go.mod h1:1v8QVDd7q/eJ+eg4sgeOSEafBAFhkt4ab2i97M3IkNQ=
+maunium.net/go/mautrix v0.15.4/go.mod h1:dBaDmsnOOBM4a+gKcgefXH73pHGXm+MCJzCs1dXFgrw=

guildportal.go

@@ -22,6 +22,7 @@ import (
 	"sync"
 
 	log "maunium.net/go/maulogger/v2"
+	"maunium.net/go/maulogger/v2/maulogadapt"
 
 	"maunium.net/go/mautrix"
 	"maunium.net/go/mautrix/event"
@@ -219,7 +220,7 @@ func (guild *Guild) CreateMatrixRoom(user *User, meta *discordgo.Guild) error {
 	guild.bridge.guildsLock.Unlock()
 	guild.log.Infoln("Matrix room created:", guild.MXID)
 
-	user.ensureInvited(nil, guild.MXID, false)
+	user.ensureInvited(nil, guild.MXID, false, true)
 
 	return nil
 }
@@ -236,6 +237,7 @@ func (guild *Guild) UpdateInfo(source *User, meta *discordgo.Guild) *discordgo.G
 		guild.UpdateBridgeInfo()
 		guild.Update()
 	}
+	source.ensureInvited(nil, guild.MXID, false, false)
 	return meta
 }
 
@@ -270,12 +272,15 @@ func (guild *Guild) UpdateAvatar(iconID string) bool {
 	guild.Avatar = iconID
 	guild.AvatarURL = id.ContentURI{}
 	if guild.Avatar != "" {
-		var err error
+		// TODO direct media support
-		guild.AvatarURL, err = uploadAvatar(guild.bridge.Bot, discordgo.EndpointGuildIcon(guild.ID, iconID))
+		copied, err := guild.bridge.copyAttachmentToMatrix(guild.bridge.Bot, discordgo.EndpointGuildIcon(guild.ID, iconID), false, AttachmentMeta{
+			AttachmentID: fmt.Sprintf("guild_avatar/%s/%s", guild.ID, iconID),
+		})
 		if err != nil {
-			guild.log.Warnfln("Failed to reupload guild avatar %s: %v", guild.Avatar, err)
+			guild.log.Warnfln("Failed to reupload guild avatar %s: %v", iconID, err)
 			return true
 		}
+		guild.AvatarURL = copied.MXC
 	}
 	if guild.MXID != "" {
 		_, err := guild.bridge.Bot.SetRoomAvatar(guild.MXID, guild.AvatarURL)
@@ -293,14 +298,14 @@ func (guild *Guild) cleanup() {
 		return
 	}
 	intent := guild.bridge.Bot
-	if guild.bridge.SpecVersions.UnstableFeatures["com.beeper.room_yeeting"] {
+	if guild.bridge.SpecVersions.Supports(mautrix.BeeperFeatureRoomYeeting) {
 		err := intent.BeeperDeleteRoom(guild.MXID)
-		if err == nil || errors.Is(err, mautrix.MNotFound) {
+		if err != nil && !errors.Is(err, mautrix.MNotFound) {
-			return
+			guild.log.Errorfln("Failed to delete %s using hungryserv yeet endpoint: %v", guild.MXID, err)
 		}
-		guild.log.Warnfln("Failed to delete %s using hungryserv yeet endpoint, falling back to normal behavior: %v", guild.MXID, err)
+		return
 	}
-	guild.bridge.cleanupRoom(intent, guild.MXID, false, guild.log)
+	guild.bridge.cleanupRoom(intent, guild.MXID, false, *maulogadapt.MauAsZero(guild.log))
 }
 
 func (guild *Guild) RemoveMXID() {

main.go

@@ -18,13 +18,9 @@ package main
 
 import (
 	_ "embed"
-	"fmt"
-	"runtime"
-	"strings"
 	"sync"
 
-	"github.com/rs/zerolog"
+	"golang.org/x/sync/semaphore"
-
 	"maunium.net/go/mautrix/bridge"
 	"maunium.net/go/mautrix/bridge/commands"
 	"maunium.net/go/mautrix/id"
@@ -78,7 +74,8 @@ type DiscordBridge struct {
 	puppetsByCustomMXID map[id.UserID]*Puppet
 	puppetsLock         sync.Mutex
 
-	attachmentTransfers *util.SyncMap[attachmentKey, *util.ReturnableOnce[*database.File]]
+	attachmentTransfers         *util.SyncMap[attachmentKey, *util.ReturnableOnce[*database.File]]
+	parallelAttachmentSemaphore *semaphore.Weighted
 }
 
 func (br *DiscordBridge) GetExampleConfig() string {
@@ -101,22 +98,13 @@ func (br *DiscordBridge) Init() {
 
 	br.DB = database.New(br.Bridge.DB, br.Log.Sub("Database"))
 	discordLog = br.ZLog.With().Str("component", "discordgo").Logger()
-
-	// TODO move this to mautrix-go?
-	zerolog.CallerMarshalFunc = func(pc uintptr, file string, line int) string {
-		files := strings.Split(file, "/")
-		file = files[len(files)-1]
-		name := runtime.FuncForPC(pc).Name()
-		fns := strings.Split(name, ".")
-		name = fns[len(fns)-1]
-		return fmt.Sprintf("%s:%d:%s()", file, line, name)
-	}
 }
 
 func (br *DiscordBridge) Start() {
 	if br.Config.Bridge.Provisioning.SharedSecret != "disable" {
 		br.provisioning = newProvisioningAPI(br)
 	}
+	br.WaitWebsocketConnected()
 	go br.startUsers()
 }
 
@@ -184,14 +172,17 @@ func main() {
 		puppets:             make(map[string]*Puppet),
 		puppetsByCustomMXID: make(map[id.UserID]*Puppet),
 
-		attachmentTransfers: util.NewSyncMap[attachmentKey, *util.ReturnableOnce[*database.File]](),
+		attachmentTransfers:         util.NewSyncMap[attachmentKey, *util.ReturnableOnce[*database.File]](),
+		parallelAttachmentSemaphore: semaphore.NewWeighted(3),
 	}
 	br.Bridge = bridge.Bridge{
-		Name:         "mautrix-discord",
+		Name:              "mautrix-discord",
-		URL:          "https://github.com/mautrix/discord",
+		URL:               "https://github.com/mautrix/discord",
-		Description:  "A Matrix-Discord puppeting bridge.",
+		Description:       "A Matrix-Discord puppeting bridge.",
-		Version:      "0.2.0",
+		Version:           "0.6.0",
-		ProtocolName: "Discord",
+		ProtocolName:      "Discord",
+		BeeperServiceName: "discordgo",
+		BeeperNetworkName: "discord",
 
 		CryptoPickleKey: "maunium.net/go/mautrix-whatsapp",
 

portal_convert.go

@@ -17,6 +17,7 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"html"
 	"strconv"
@@ -24,6 +25,9 @@ import (
 	"time"
 
 	"github.com/bwmarrin/discordgo"
+	"github.com/rs/zerolog"
+	"golang.org/x/exp/slices"
+	"maunium.net/go/mautrix/id"
 
 	"maunium.net/go/mautrix"
 	"maunium.net/go/mautrix/appservice"
@@ -48,14 +52,14 @@ func (portal *Portal) createMediaFailedMessage(bridgeErr error) *event.MessageEv
 
 const DiscordStickerSize = 160
 
-func (portal *Portal) convertDiscordFile(typeName string, intent *appservice.IntentAPI, id, url string, content *event.MessageEventContent) *event.MessageEventContent {
+func (portal *Portal) convertDiscordFile(ctx context.Context, typeName string, intent *appservice.IntentAPI, id, url string, content *event.MessageEventContent) *event.MessageEventContent {
 	meta := AttachmentMeta{AttachmentID: id, MimeType: content.Info.MimeType}
 	if typeName == "sticker" && content.Info.MimeType == "application/json" {
 		meta.Converter = portal.bridge.convertLottie
 	}
 	dbFile, err := portal.bridge.copyAttachmentToMatrix(intent, url, portal.Encrypted, meta)
 	if err != nil {
-		portal.log.Errorfln("Error copying attachment %s to Matrix: %v", id, err)
+		zerolog.Ctx(ctx).Err(err).Msg("Failed to copy attachment to Matrix")
 		return portal.createMediaFailedMessage(err)
 	}
 	if typeName == "sticker" && content.Info.MimeType == "application/json" {
@@ -66,10 +70,6 @@ func (portal *Portal) convertDiscordFile(typeName string, intent *appservice.Int
 		content.Info.Width = dbFile.Width
 		content.Info.Height = dbFile.Height
 	}
-	if content.Info.Width == 0 && content.Info.Height == 0 && typeName == "sticker" {
-		content.Info.Width = DiscordStickerSize
-		content.Info.Height = DiscordStickerSize
-	}
 	if dbFile.DecryptionInfo != nil {
 		content.File = &event.EncryptedFileInfo{
 			EncryptedFile: *dbFile.DecryptionInfo,
@@ -78,8 +78,17 @@ func (portal *Portal) convertDiscordFile(typeName string, intent *appservice.Int
 	} else {
 		content.URL = dbFile.MXC.CUString()
 	}
+	return content
+}
 
-	if typeName == "sticker" && (content.Info.Width > DiscordStickerSize || content.Info.Height > DiscordStickerSize) {
+func (portal *Portal) cleanupConvertedStickerInfo(content *event.MessageEventContent) {
+	if content.Info == nil {
+		return
+	}
+	if content.Info.Width == 0 && content.Info.Height == 0 {
+		content.Info.Width = DiscordStickerSize
+		content.Info.Height = DiscordStickerSize
+	} else if content.Info.Width > DiscordStickerSize || content.Info.Height > DiscordStickerSize {
 		if content.Info.Width > content.Info.Height {
 			content.Info.Height /= content.Info.Width / DiscordStickerSize
 			content.Info.Width = DiscordStickerSize
@@ -91,36 +100,51 @@ func (portal *Portal) convertDiscordFile(typeName string, intent *appservice.Int
 			content.Info.Height = DiscordStickerSize
 		}
 	}
-	return content
 }
 
-func (portal *Portal) convertDiscordSticker(intent *appservice.IntentAPI, sticker *discordgo.Sticker) *ConvertedMessage {
+func (portal *Portal) convertDiscordSticker(ctx context.Context, intent *appservice.IntentAPI, sticker *discordgo.Sticker) *ConvertedMessage {
-	var mime string
+	var mime, ext string
 	switch sticker.FormatType {
 	case discordgo.StickerFormatTypePNG:
 		mime = "image/png"
+		ext = "png"
 	case discordgo.StickerFormatTypeAPNG:
 		mime = "image/apng"
+		ext = "png"
 	case discordgo.StickerFormatTypeLottie:
 		mime = "application/json"
+		ext = "json"
 	case discordgo.StickerFormatTypeGIF:
 		mime = "image/gif"
+		ext = "gif"
 	default:
-		portal.log.Warnfln("Unknown sticker format %d in %s", sticker.FormatType, sticker.ID)
+		zerolog.Ctx(ctx).Warn().
+			Int("sticker_format", int(sticker.FormatType)).
+			Str("sticker_id", sticker.ID).
+			Msg("Unknown sticker format")
 	}
+	content := &event.MessageEventContent{
+		Body: sticker.Name, // TODO find description from somewhere?
+		Info: &event.FileInfo{
+			MimeType: mime,
+		},
+	}
+
+	mxc := portal.bridge.Config.Bridge.MediaPatterns.Sticker(sticker.ID, ext)
+	if mxc.IsEmpty() {
+		content = portal.convertDiscordFile(ctx, "sticker", intent, sticker.ID, sticker.URL(), content)
+	} else {
+		content.URL = mxc.CUString()
+	}
+	portal.cleanupConvertedStickerInfo(content)
 	return &ConvertedMessage{
 		AttachmentID: sticker.ID,
 		Type:         event.EventSticker,
-		Content: portal.convertDiscordFile("sticker", intent, sticker.ID, sticker.URL(), &event.MessageEventContent{
+		Content:      content,
-			Body: sticker.Name, // TODO find description from somewhere?
-			Info: &event.FileInfo{
-				MimeType: mime,
-			},
-		}),
 	}
 }
 
-func (portal *Portal) convertDiscordAttachment(intent *appservice.IntentAPI, att *discordgo.MessageAttachment) *ConvertedMessage {
+func (portal *Portal) convertDiscordAttachment(ctx context.Context, intent *appservice.IntentAPI, att *discordgo.MessageAttachment) *ConvertedMessage {
 	content := &event.MessageEventContent{
 		Body: att.Filename,
 		Info: &event.FileInfo{
@@ -137,9 +161,20 @@ func (portal *Portal) convertDiscordAttachment(intent *appservice.IntentAPI, att
 		content.FileName = att.Filename
 	}
 
+	var extra map[string]any
+
 	switch strings.ToLower(strings.Split(att.ContentType, "/")[0]) {
 	case "audio":
 		content.MsgType = event.MsgAudio
+		if att.Waveform != nil {
+			// TODO convert waveform
+			extra = map[string]any{
+				"org.matrix.1767.audio": map[string]any{
+					"duration": int(att.DurationSeconds * 1000),
+				},
+				"org.matrix.msc3245.voice": map[string]any{},
+			}
+		}
 	case "image":
 		content.MsgType = event.MsgImage
 	case "video":
@@ -147,18 +182,31 @@ func (portal *Portal) convertDiscordAttachment(intent *appservice.IntentAPI, att
 	default:
 		content.MsgType = event.MsgFile
 	}
-	content = portal.convertDiscordFile("attachment", intent, att.ID, att.URL, content)
+	mxc := portal.bridge.Config.Bridge.MediaPatterns.Attachment(portal.Key.ChannelID, att.ID, att.Filename)
+	if mxc.IsEmpty() {
+		content = portal.convertDiscordFile(ctx, "attachment", intent, att.ID, att.URL, content)
+	} else {
+		content.URL = mxc.CUString()
+	}
 	return &ConvertedMessage{
 		AttachmentID: att.ID,
 		Type:         event.EventMessage,
 		Content:      content,
+		Extra:        extra,
 	}
 }
 
-func (portal *Portal) convertDiscordVideoEmbed(intent *appservice.IntentAPI, embed *discordgo.MessageEmbed) *ConvertedMessage {
+func (portal *Portal) convertDiscordVideoEmbed(ctx context.Context, intent *appservice.IntentAPI, embed *discordgo.MessageEmbed) *ConvertedMessage {
 	attachmentID := fmt.Sprintf("video_%s", embed.URL)
-	dbFile, err := portal.bridge.copyAttachmentToMatrix(intent, embed.Video.ProxyURL, portal.Encrypted, NoMeta)
+	var proxyURL string
+	if embed.Video != nil {
+		proxyURL = embed.Video.ProxyURL
+	} else {
+		proxyURL = embed.Thumbnail.ProxyURL
+	}
+	dbFile, err := portal.bridge.copyAttachmentToMatrix(intent, proxyURL, portal.Encrypted, NoMeta)
 	if err != nil {
+		zerolog.Ctx(ctx).Err(err).Msg("Failed to copy video embed to Matrix")
 		return &ConvertedMessage{
 			AttachmentID: attachmentID,
 			Type:         event.EventMessage,
@@ -167,16 +215,21 @@ func (portal *Portal) convertDiscordVideoEmbed(intent *appservice.IntentAPI, emb
 	}
 
 	content := &event.MessageEventContent{
-		MsgType: event.MsgVideo,
+		Body: embed.URL,
-		Body:    embed.URL,
 		Info: &event.FileInfo{
-			Width:    embed.Video.Width,
-			Height:   embed.Video.Height,
 			MimeType: dbFile.MimeType,
-
+			Size:     dbFile.Size,
-			Size: dbFile.Size,
 		},
 	}
+	if embed.Video != nil {
+		content.MsgType = event.MsgVideo
+		content.Info.Width = embed.Video.Width
+		content.Info.Height = embed.Video.Height
+	} else {
+		content.MsgType = event.MsgImage
+		content.Info.Width = embed.Thumbnail.Width
+		content.Info.Height = embed.Thumbnail.Height
+	}
 	if content.Info.Width == 0 && content.Info.Height == 0 {
 		content.Info.Width = dbFile.Width
 		content.Info.Height = dbFile.Height
@@ -190,7 +243,7 @@ func (portal *Portal) convertDiscordVideoEmbed(intent *appservice.IntentAPI, emb
 		content.URL = dbFile.MXC.CUString()
 	}
 	extra := map[string]any{}
-	if embed.Type == discordgo.EmbedTypeGifv {
+	if content.MsgType == event.MsgVideo && embed.Type == discordgo.EmbedTypeGifv {
 		extra["info"] = map[string]any{
 			"fi.mau.discord.gifv":  true,
 			"fi.mau.loop":          true,
@@ -207,22 +260,24 @@ func (portal *Portal) convertDiscordVideoEmbed(intent *appservice.IntentAPI, emb
 	}
 }
 
-func (portal *Portal) convertDiscordMessage(intent *appservice.IntentAPI, msg *discordgo.Message) []*ConvertedMessage {
+func (portal *Portal) convertDiscordMessage(ctx context.Context, puppet *Puppet, intent *appservice.IntentAPI, msg *discordgo.Message) []*ConvertedMessage {
 	predictedLength := len(msg.Attachments) + len(msg.StickerItems)
 	if msg.Content != "" {
 		predictedLength++
 	}
 	parts := make([]*ConvertedMessage, 0, predictedLength)
-	if textPart := portal.convertDiscordTextMessage(intent, msg); textPart != nil {
+	if textPart := portal.convertDiscordTextMessage(ctx, intent, msg); textPart != nil {
 		parts = append(parts, textPart)
 	}
+	log := zerolog.Ctx(ctx)
 	handledIDs := make(map[string]struct{})
 	for _, att := range msg.Attachments {
 		if _, handled := handledIDs[att.ID]; handled {
 			continue
 		}
 		handledIDs[att.ID] = struct{}{}
-		if part := portal.convertDiscordAttachment(intent, att); part != nil {
+		log := log.With().Str("attachment_id", att.ID).Logger()
+		if part := portal.convertDiscordAttachment(log.WithContext(ctx), intent, att); part != nil {
 			parts = append(parts, part)
 		}
 	}
@@ -231,13 +286,14 @@ func (portal *Portal) convertDiscordMessage(intent *appservice.IntentAPI, msg *d
 			continue
 		}
 		handledIDs[sticker.ID] = struct{}{}
-		if part := portal.convertDiscordSticker(intent, sticker); part != nil {
+		log := log.With().Str("sticker_id", sticker.ID).Logger()
+		if part := portal.convertDiscordSticker(log.WithContext(ctx), intent, sticker); part != nil {
 			parts = append(parts, part)
 		}
 	}
-	for _, embed := range msg.Embeds {
+	for i, embed := range msg.Embeds {
 		// Ignore non-video embeds, they're handled in convertDiscordTextMessage
-		if getEmbedType(embed) != EmbedVideo {
+		if getEmbedType(msg, embed) != EmbedVideo {
 			continue
 		}
 		// Discord deduplicates embeds by URL. It makes things easier for us too.
@@ -245,14 +301,102 @@ func (portal *Portal) convertDiscordMessage(intent *appservice.IntentAPI, msg *d
 			continue
 		}
 		handledIDs[embed.URL] = struct{}{}
-		part := portal.convertDiscordVideoEmbed(intent, embed)
+		log := log.With().
+			Str("computed_embed_type", "video").
+			Str("embed_type", string(embed.Type)).
+			Int("embed_index", i).
+			Logger()
+		part := portal.convertDiscordVideoEmbed(log.WithContext(ctx), intent, embed)
 		if part != nil {
 			parts = append(parts, part)
 		}
 	}
+	if len(parts) == 0 && msg.Thread != nil {
+		parts = append(parts, &ConvertedMessage{Type: event.EventMessage, Content: &event.MessageEventContent{
+			MsgType: event.MsgText,
+			Body:    fmt.Sprintf("Created a thread: %s", msg.Thread.Name),
+		}})
+	}
+	for _, part := range parts {
+		puppet.addWebhookMeta(part, msg)
+		puppet.addMemberMeta(part, msg)
+	}
 	return parts
 }
 
+func (puppet *Puppet) addMemberMeta(part *ConvertedMessage, msg *discordgo.Message) {
+	if msg.Member == nil {
+		return
+	}
+	if part.Extra == nil {
+		part.Extra = make(map[string]any)
+	}
+	var avatarURL id.ContentURI
+	var discordAvatarURL string
+	if msg.Member.Avatar != "" {
+		var err error
+		avatarURL, discordAvatarURL, err = puppet.bridge.reuploadUserAvatar(puppet.DefaultIntent(), msg.GuildID, msg.Author.ID, msg.Author.Avatar)
+		if err != nil {
+			puppet.log.Warn().Err(err).
+				Str("avatar_id", msg.Author.Avatar).
+				Msg("Failed to reupload guild user avatar")
+		}
+	}
+	part.Extra["fi.mau.discord.guild_member_metadata"] = map[string]any{
+		"nick":       msg.Member.Nick,
+		"avatar_id":  msg.Member.Avatar,
+		"avatar_url": discordAvatarURL,
+		"avatar_mxc": avatarURL.String(),
+	}
+	if msg.Member.Nick != "" || !avatarURL.IsEmpty() {
+		perMessageProfile := map[string]any{
+			"is_multiple_users": false,
+
+			"displayname": msg.Member.Nick,
+			"avatar_url":  avatarURL.String(),
+		}
+		if msg.Member.Nick == "" {
+			perMessageProfile["displayname"] = puppet.Name
+		}
+		if avatarURL.IsEmpty() {
+			perMessageProfile["avatar_url"] = puppet.AvatarURL.String()
+		}
+		part.Extra["com.beeper.per_message_profile"] = perMessageProfile
+	}
+}
+
+func (puppet *Puppet) addWebhookMeta(part *ConvertedMessage, msg *discordgo.Message) {
+	if msg.WebhookID == "" {
+		return
+	}
+	if part.Extra == nil {
+		part.Extra = make(map[string]any)
+	}
+	var avatarURL id.ContentURI
+	if msg.Author.Avatar != "" {
+		var err error
+		avatarURL, _, err = puppet.bridge.reuploadUserAvatar(puppet.DefaultIntent(), "", msg.Author.ID, msg.Author.Avatar)
+		if err != nil {
+			puppet.log.Warn().Err(err).
+				Str("avatar_id", msg.Author.Avatar).
+				Msg("Failed to reupload webhook avatar")
+		}
+	}
+	part.Extra["fi.mau.discord.webhook_metadata"] = map[string]any{
+		"id":         msg.WebhookID,
+		"name":       msg.Author.Username,
+		"avatar_id":  msg.Author.Avatar,
+		"avatar_url": msg.Author.AvatarURL(""),
+		"avatar_mxc": avatarURL.String(),
+	}
+	part.Extra["com.beeper.per_message_profile"] = map[string]any{
+		"is_multiple_users": true,
+
+		"avatar_url":  avatarURL.String(),
+		"displayname": msg.Author.Username,
+	}
+}
+
 const (
 	embedHTMLWrapper         = `<blockquote class="discord-embed">%s</blockquote>`
 	embedHTMLWrapperColor    = `<blockquote class="discord-embed" background-color="#%06X">%s</blockquote>`
@@ -274,7 +418,8 @@ const (
 	embedFooterDateSeparator = ` • `
 )
 
-func (portal *Portal) convertDiscordRichEmbed(intent *appservice.IntentAPI, embed *discordgo.MessageEmbed, msgID string, index int) string {
+func (portal *Portal) convertDiscordRichEmbed(ctx context.Context, intent *appservice.IntentAPI, embed *discordgo.MessageEmbed, msgID string, index int) string {
+	log := zerolog.Ctx(ctx)
 	var htmlParts []string
 	if embed.Author != nil {
 		var authorHTML string
@@ -286,7 +431,7 @@ func (portal *Portal) convertDiscordRichEmbed(intent *appservice.IntentAPI, embe
 		if embed.Author.ProxyIconURL != "" {
 			dbFile, err := portal.bridge.copyAttachmentToMatrix(intent, embed.Author.ProxyIconURL, false, NoMeta)
 			if err != nil {
-				portal.log.Warnfln("Failed to reupload author icon in embed #%d of message %s: %v", index+1, msgID, err)
+				log.Warn().Err(err).Msg("Failed to reupload author icon in embed")
 			} else {
 				authorHTML = fmt.Sprintf(embedHTMLAuthorWithImage, dbFile.MXC, authorNameHTML)
 			}
@@ -336,7 +481,7 @@ func (portal *Portal) convertDiscordRichEmbed(intent *appservice.IntentAPI, embe
 	if embed.Image != nil {
 		dbFile, err := portal.bridge.copyAttachmentToMatrix(intent, embed.Image.ProxyURL, false, NoMeta)
 		if err != nil {
-			portal.log.Warnfln("Failed to reupload image in embed #%d of message %s: %v", index+1, msgID, err)
+			log.Warn().Err(err).Msg("Failed to reupload image in embed")
 		} else {
 			htmlParts = append(htmlParts, fmt.Sprintf(embedHTMLImage, dbFile.MXC))
 		}
@@ -346,7 +491,7 @@ func (portal *Portal) convertDiscordRichEmbed(intent *appservice.IntentAPI, embe
 		formattedTime := embed.Timestamp
 		parsedTS, err := time.Parse(time.RFC3339, embed.Timestamp)
 		if err != nil {
-			portal.log.Warnfln("Failed to parse timestamp in embed #%d of message %s: %v", index+1, msgID, err)
+			log.Warn().Err(err).Msg("Failed to parse timestamp in embed")
 		} else {
 			formattedTime = parsedTS.Format(discordTimestampStyle('F').Format())
 		}
@@ -362,7 +507,7 @@ func (portal *Portal) convertDiscordRichEmbed(intent *appservice.IntentAPI, embe
 		if embed.Footer.ProxyIconURL != "" {
 			dbFile, err := portal.bridge.copyAttachmentToMatrix(intent, embed.Footer.ProxyIconURL, false, NoMeta)
 			if err != nil {
-				portal.log.Warnfln("Failed to reupload footer icon in embed #%d of message %s: %v", index+1, msgID, err)
+				log.Warn().Err(err).Msg("Failed to reupload footer icon in embed")
 			} else {
 				footerHTML = fmt.Sprintf(embedHTMLFooterWithImage, dbFile.MXC, html.EscapeString(embed.Footer.Text), datePart)
 			}
@@ -391,40 +536,40 @@ type BeeperLinkPreview struct {
 	ImageEncryption *event.EncryptedFileInfo `json:"beeper:image:encryption,omitempty"`
 }
 
-func (portal *Portal) convertDiscordLinkEmbedImage(intent *appservice.IntentAPI, url string, width, height int, preview *BeeperLinkPreview) {
+func (portal *Portal) convertDiscordLinkEmbedImage(ctx context.Context, intent *appservice.IntentAPI, url string, width, height int, preview *BeeperLinkPreview) {
 	dbFile, err := portal.bridge.copyAttachmentToMatrix(intent, url, portal.Encrypted, NoMeta)
 	if err != nil {
-		portal.log.Warnfln("Failed to copy image in URL preview: %v", err)
+		zerolog.Ctx(ctx).Warn().Err(err).Msg("Failed to reupload image in URL preview")
+		return
+	}
+	if width != 0 || height != 0 {
+		preview.ImageWidth = width
+		preview.ImageHeight = height
 	} else {
-		if width != 0 || height != 0 {
+		preview.ImageWidth = dbFile.Width
-			preview.ImageWidth = width
+		preview.ImageHeight = dbFile.Height
-			preview.ImageHeight = height
+	}
-		} else {
+	preview.ImageSize = dbFile.Size
-			preview.ImageWidth = dbFile.Width
+	preview.ImageType = dbFile.MimeType
-			preview.ImageHeight = dbFile.Height
+	if dbFile.Encrypted {
-		}
+		preview.ImageEncryption = &event.EncryptedFileInfo{
-		preview.ImageSize = dbFile.Size
+			EncryptedFile: *dbFile.DecryptionInfo,
-		preview.ImageType = dbFile.MimeType
+			URL:           dbFile.MXC.CUString(),
-		if dbFile.Encrypted {
-			preview.ImageEncryption = &event.EncryptedFileInfo{
-				EncryptedFile: *dbFile.DecryptionInfo,
-				URL:           dbFile.MXC.CUString(),
-			}
-		} else {
-			preview.ImageURL = dbFile.MXC.CUString()
 		}
+	} else {
+		preview.ImageURL = dbFile.MXC.CUString()
 	}
 }
 
-func (portal *Portal) convertDiscordLinkEmbedToBeeper(intent *appservice.IntentAPI, embed *discordgo.MessageEmbed) *BeeperLinkPreview {
+func (portal *Portal) convertDiscordLinkEmbedToBeeper(ctx context.Context, intent *appservice.IntentAPI, embed *discordgo.MessageEmbed) *BeeperLinkPreview {
 	var preview BeeperLinkPreview
 	preview.MatchedURL = embed.URL
 	preview.Title = embed.Title
 	preview.Description = embed.Description
 	if embed.Image != nil {
-		portal.convertDiscordLinkEmbedImage(intent, embed.Image.ProxyURL, embed.Image.Width, embed.Image.Height, &preview)
+		portal.convertDiscordLinkEmbedImage(ctx, intent, embed.Image.ProxyURL, embed.Image.Width, embed.Image.Height, &preview)
 	} else if embed.Thumbnail != nil {
-		portal.convertDiscordLinkEmbedImage(intent, embed.Thumbnail.ProxyURL, embed.Thumbnail.Width, embed.Thumbnail.Height, &preview)
+		portal.convertDiscordLinkEmbedImage(ctx, intent, embed.Thumbnail.ProxyURL, embed.Thumbnail.Width, embed.Thumbnail.Height, &preview)
 	}
 	return &preview
 }
@@ -450,7 +595,7 @@ func isActuallyLinkPreview(embed *discordgo.MessageEmbed) bool {
 	return embed.Video != nil && embed.Video.ProxyURL == ""
 }
 
-func getEmbedType(embed *discordgo.MessageEmbed) BridgeEmbedType {
+func getEmbedType(msg *discordgo.Message, embed *discordgo.MessageEmbed) BridgeEmbedType {
 	switch embed.Type {
 	case discordgo.EmbedTypeLink, discordgo.EmbedTypeArticle:
 		return EmbedLinkPreview
@@ -461,7 +606,14 @@ func getEmbedType(embed *discordgo.MessageEmbed) BridgeEmbedType {
 		return EmbedVideo
 	case discordgo.EmbedTypeGifv:
 		return EmbedVideo
-	case discordgo.EmbedTypeRich, discordgo.EmbedTypeImage:
+	case discordgo.EmbedTypeImage:
+		if msg != nil && isPlainGifMessage(msg) {
+			return EmbedVideo
+		} else if embed.Image == nil && embed.Thumbnail != nil {
+			return EmbedLinkPreview
+		}
+		return EmbedRich
+	case discordgo.EmbedTypeRich:
 		return EmbedRich
 	default:
 		return EmbedUnknown
@@ -469,10 +621,35 @@ func getEmbedType(embed *discordgo.MessageEmbed) BridgeEmbedType {
 }
 
 func isPlainGifMessage(msg *discordgo.Message) bool {
-	return len(msg.Embeds) == 1 && msg.Embeds[0].Video != nil && msg.Embeds[0].URL == msg.Content && msg.Embeds[0].Type == discordgo.EmbedTypeGifv
+	return len(msg.Embeds) == 1 && msg.Embeds[0].URL == msg.Content &&
+		((msg.Embeds[0].Type == discordgo.EmbedTypeGifv && msg.Embeds[0].Video != nil) ||
+			(msg.Embeds[0].Type == discordgo.EmbedTypeImage && msg.Embeds[0].Image == nil && msg.Embeds[0].Thumbnail != nil))
 }
 
-func (portal *Portal) convertDiscordTextMessage(intent *appservice.IntentAPI, msg *discordgo.Message) *ConvertedMessage {
+func (portal *Portal) convertDiscordMentions(msg *discordgo.Message, syncGhosts bool) *event.Mentions {
+	var matrixMentions event.Mentions
+	for _, mention := range msg.Mentions {
+		puppet := portal.bridge.GetPuppetByID(mention.ID)
+		if syncGhosts {
+			puppet.UpdateInfo(nil, mention, nil)
+		}
+		user := portal.bridge.GetUserByID(mention.ID)
+		if user != nil {
+			matrixMentions.UserIDs = append(matrixMentions.UserIDs, user.MXID)
+		} else {
+			matrixMentions.UserIDs = append(matrixMentions.UserIDs, puppet.MXID)
+		}
+	}
+	slices.Sort(matrixMentions.UserIDs)
+	matrixMentions.UserIDs = slices.Compact(matrixMentions.UserIDs)
+	if msg.MentionEveryone {
+		matrixMentions.Room = true
+	}
+	return &matrixMentions
+}
+
+func (portal *Portal) convertDiscordTextMessage(ctx context.Context, intent *appservice.IntentAPI, msg *discordgo.Message) *ConvertedMessage {
+	log := zerolog.Ctx(ctx)
 	if msg.Type == discordgo.MessageTypeCall {
 		return &ConvertedMessage{Type: event.EventMessage, Content: &event.MessageEventContent{
 			MsgType: event.MsgEmote,
@@ -487,7 +664,7 @@ func (portal *Portal) convertDiscordTextMessage(intent *appservice.IntentAPI, ms
 	var htmlParts []string
 	if msg.Interaction != nil {
 		puppet := portal.bridge.GetPuppetByID(msg.Interaction.User.ID)
-		puppet.UpdateInfo(nil, msg.Interaction.User)
+		puppet.UpdateInfo(nil, msg.Interaction.User, nil)
 		htmlParts = append(htmlParts, fmt.Sprintf(msgInteractionTemplateHTML, puppet.MXID, puppet.Name, msg.Interaction.Name))
 	}
 	if msg.Content != "" && !isPlainGifMessage(msg) {
@@ -495,15 +672,24 @@ func (portal *Portal) convertDiscordTextMessage(intent *appservice.IntentAPI, ms
 	}
 	previews := make([]*BeeperLinkPreview, 0)
 	for i, embed := range msg.Embeds {
-		switch getEmbedType(embed) {
+		if i == 0 && msg.MessageReference == nil && isReplyEmbed(embed) {
+			continue
+		}
+		with := log.With().
+			Str("embed_type", string(embed.Type)).
+			Int("embed_index", i)
+		switch getEmbedType(msg, embed) {
 		case EmbedRich:
-			htmlParts = append(htmlParts, portal.convertDiscordRichEmbed(intent, embed, msg.ID, i))
+			log := with.Str("computed_embed_type", "rich").Logger()
+			htmlParts = append(htmlParts, portal.convertDiscordRichEmbed(log.WithContext(ctx), intent, embed, msg.ID, i))
 		case EmbedLinkPreview:
-			previews = append(previews, portal.convertDiscordLinkEmbedToBeeper(intent, embed))
+			log := with.Str("computed_embed_type", "link preview").Logger()
+			previews = append(previews, portal.convertDiscordLinkEmbedToBeeper(log.WithContext(ctx), intent, embed))
 		case EmbedVideo:
 			// Ignore video embeds, they're handled as separate messages
 		default:
-			portal.log.Warnfln("Unknown type %s in embed #%d of message %s", embed.Type, i+1, msg.ID)
+			log := with.Logger()
+			log.Warn().Msg("Unknown embed type in message")
 		}
 	}
 
@@ -525,5 +711,11 @@ func (portal *Portal) convertDiscordTextMessage(intent *appservice.IntentAPI, ms
 		"com.beeper.linkpreviews": previews,
 	}
 
+	if msg.WebhookID != "" && msg.ApplicationID == "" && portal.bridge.Config.Bridge.PrefixWebhookMessages {
+		content.EnsureHasHTML()
+		content.Body = fmt.Sprintf("%s: %s", msg.Author.Username, content.Body)
+		content.FormattedBody = fmt.Sprintf("<strong>%s</strong>: %s", html.EscapeString(msg.Author.Username), content.FormattedBody)
+	}
+
 	return &ConvertedMessage{Type: event.EventMessage, Content: &content, Extra: extraContent}
 }

puppet.go

@@ -3,11 +3,13 @@ package main
 import (
 	"fmt"
 	"regexp"
+	"strings"
 	"sync"
 
 	"github.com/bwmarrin/discordgo"
 	"github.com/rs/zerolog"
 
+	"maunium.net/go/mautrix"
 	"maunium.net/go/mautrix/appservice"
 	"maunium.net/go/mautrix/bridge"
 	"maunium.net/go/mautrix/id"
@@ -193,7 +195,7 @@ func (puppet *Puppet) updatePortalMeta(meta func(portal *Portal)) {
 }
 
 func (puppet *Puppet) UpdateName(info *discordgo.User) bool {
-	newName := puppet.bridge.Config.Bridge.FormatDisplayname(info)
+	newName := puppet.bridge.Config.Bridge.FormatDisplayname(info, puppet.IsWebhook, puppet.IsApplication)
 	if puppet.Name == newName && puppet.NameSet {
 		return false
 	}
@@ -204,7 +206,7 @@ func (puppet *Puppet) UpdateName(info *discordgo.User) bool {
 		puppet.log.Warn().Err(err).Msg("Failed to update displayname")
 	} else {
 		go puppet.updatePortalMeta(func(portal *Portal) {
-			if portal.UpdateNameDirect(puppet.Name) {
+			if portal.UpdateNameDirect(puppet.Name, false) {
 				portal.Update()
 				portal.UpdateBridgeInfo()
 			}
@@ -214,18 +216,53 @@ func (puppet *Puppet) UpdateName(info *discordgo.User) bool {
 	return true
 }
 
+func (br *DiscordBridge) reuploadUserAvatar(intent *appservice.IntentAPI, guildID, userID, avatarID string) (id.ContentURI, string, error) {
+	var downloadURL, ext string
+	if guildID == "" {
+		downloadURL = discordgo.EndpointUserAvatar(userID, avatarID)
+		ext = "png"
+		if strings.HasPrefix(avatarID, "a_") {
+			downloadURL = discordgo.EndpointUserAvatarAnimated(userID, avatarID)
+			ext = "gif"
+		}
+	} else {
+		downloadURL = discordgo.EndpointGuildMemberAvatar(guildID, userID, avatarID)
+		ext = "png"
+		if strings.HasPrefix(avatarID, "a_") {
+			downloadURL = discordgo.EndpointGuildMemberAvatarAnimated(guildID, userID, avatarID)
+			ext = "gif"
+		}
+	}
+	if guildID == "" {
+		url := br.Config.Bridge.MediaPatterns.Avatar(userID, avatarID, ext)
+		if !url.IsEmpty() {
+			return url, downloadURL, nil
+		}
+	}
+	copied, err := br.copyAttachmentToMatrix(intent, downloadURL, false, AttachmentMeta{
+		AttachmentID: fmt.Sprintf("avatar/%s/%s/%s", guildID, userID, avatarID),
+	})
+	if err != nil {
+		return id.ContentURI{}, downloadURL, err
+	}
+	return copied.MXC, downloadURL, nil
+}
+
 func (puppet *Puppet) UpdateAvatar(info *discordgo.User) bool {
-	if puppet.Avatar == info.Avatar && puppet.AvatarSet {
+	avatarID := info.Avatar
+	if puppet.IsWebhook && !puppet.bridge.Config.Bridge.EnableWebhookAvatars {
+		avatarID = ""
+	}
+	if puppet.Avatar == avatarID && puppet.AvatarSet {
 		return false
 	}
-	avatarChanged := info.Avatar != puppet.Avatar
+	avatarChanged := avatarID != puppet.Avatar
-	puppet.Avatar = info.Avatar
+	puppet.Avatar = avatarID
 	puppet.AvatarSet = false
 	puppet.AvatarURL = id.ContentURI{}
 
-	// TODO should we just use discord's default avatars for users with no avatar?
 	if puppet.Avatar != "" && (puppet.AvatarURL.IsEmpty() || avatarChanged) {
-		url, err := uploadAvatar(puppet.DefaultIntent(), info.AvatarURL(""))
+		url, _, err := puppet.bridge.reuploadUserAvatar(puppet.DefaultIntent(), "", info.ID, puppet.Avatar)
 		if err != nil {
 			puppet.log.Warn().Err(err).Str("avatar_id", puppet.Avatar).Msg("Failed to reupload user avatar")
 			return true
@@ -248,7 +285,7 @@ func (puppet *Puppet) UpdateAvatar(info *discordgo.User) bool {
 	return true
 }
 
-func (puppet *Puppet) UpdateInfo(source *User, info *discordgo.User) {
+func (puppet *Puppet) UpdateInfo(source *User, info *discordgo.User, message *discordgo.Message) {
 	puppet.syncLock.Lock()
 	defer puppet.syncLock.Unlock()
 
@@ -271,9 +308,83 @@ func (puppet *Puppet) UpdateInfo(source *User, info *discordgo.User) {
 	}
 
 	changed := false
+	if message != nil {
+		if message.WebhookID != "" && message.ApplicationID == "" && !puppet.IsWebhook {
+			puppet.log.Debug().
+				Str("message_id", message.ID).
+				Str("webhook_id", message.WebhookID).
+				Msg("Found webhook ID in message, marking ghost as a webhook")
+			puppet.IsWebhook = true
+			changed = true
+		}
+		if message.ApplicationID != "" && !puppet.IsApplication {
+			puppet.log.Debug().
+				Str("message_id", message.ID).
+				Str("application_id", message.ApplicationID).
+				Msg("Found application ID in message, marking ghost as an application")
+			puppet.IsApplication = true
+			puppet.IsWebhook = false
+			changed = true
+		}
+	}
+	changed = puppet.UpdateContactInfo(info) || changed
 	changed = puppet.UpdateName(info) || changed
 	changed = puppet.UpdateAvatar(info) || changed
 	if changed {
 		puppet.Update()
 	}
 }
+
+func (puppet *Puppet) UpdateContactInfo(info *discordgo.User) bool {
+	changed := false
+	if puppet.Username != info.Username {
+		puppet.Username = info.Username
+		changed = true
+	}
+	if puppet.GlobalName != info.GlobalName {
+		puppet.GlobalName = info.GlobalName
+		changed = true
+	}
+	if puppet.Discriminator != info.Discriminator {
+		puppet.Discriminator = info.Discriminator
+		changed = true
+	}
+	if puppet.IsBot != info.Bot {
+		puppet.IsBot = info.Bot
+		changed = true
+	}
+	if (changed && !puppet.IsWebhook) || !puppet.ContactInfoSet {
+		puppet.ContactInfoSet = false
+		puppet.ResendContactInfo()
+		return true
+	}
+	return false
+}
+
+func (puppet *Puppet) ResendContactInfo() {
+	if !puppet.bridge.SpecVersions.Supports(mautrix.BeeperFeatureArbitraryProfileMeta) || puppet.ContactInfoSet {
+		return
+	}
+	discordUsername := puppet.Username
+	if puppet.Discriminator != "0" {
+		discordUsername += "#" + puppet.Discriminator
+	}
+	contactInfo := map[string]any{
+		"com.beeper.bridge.identifiers": []string{
+			fmt.Sprintf("discord:%s", discordUsername),
+		},
+		"com.beeper.bridge.remote_id":      puppet.ID,
+		"com.beeper.bridge.service":        puppet.bridge.BeeperServiceName,
+		"com.beeper.bridge.network":        puppet.bridge.BeeperNetworkName,
+		"com.beeper.bridge.is_network_bot": puppet.IsBot,
+	}
+	if puppet.IsWebhook {
+		contactInfo["com.beeper.bridge.identifiers"] = []string{}
+	}
+	err := puppet.DefaultIntent().BeeperUpdateProfile(contactInfo)
+	if err != nil {
+		puppet.log.Warn().Err(err).Msg("Failed to store custom contact info in profile")
+	} else {
+		puppet.ContactInfoSet = true
+	}
+}

thread.go

@@ -1,10 +1,13 @@
 package main
 
 import (
+	"context"
 	"sync"
 	"time"
 
 	"github.com/bwmarrin/discordgo"
+	"github.com/rs/zerolog"
+	"golang.org/x/exp/slices"
 	"maunium.net/go/mautrix/id"
 
 	"go.mau.fi/mautrix-discord/database"
@@ -14,7 +17,8 @@ type Thread struct {
 	*database.Thread
 	Parent *Portal
 
-	creationNoticeLock sync.Mutex
+	creationNoticeLock       sync.Mutex
+	initialBackfillAttempted bool
 }
 
 func (br *DiscordBridge) GetThreadByID(id string, root *database.Message) *Thread {
@@ -74,12 +78,63 @@ func (br *DiscordBridge) loadThread(dbThread *database.Thread, id string, root *
 	return thread
 }
 
+func (br *DiscordBridge) threadFound(ctx context.Context, source *User, rootMessage *database.Message, id string, metadata *discordgo.Channel) {
+	thread := br.GetThreadByID(id, rootMessage)
+	log := zerolog.Ctx(ctx)
+	log.Debug().Msg("Marked message as thread root")
+	if thread.CreationNoticeMXID == "" {
+		thread.Parent.sendThreadCreationNotice(ctx, thread)
+	}
+	// TODO member_ids_preview is probably not guaranteed to contain the source user
+	if source != nil && metadata != nil && slices.Contains(metadata.MemberIDsPreview, source.DiscordID) && !source.IsInPortal(thread.ID) {
+		source.MarkInPortal(database.UserPortal{
+			DiscordID: thread.ID,
+			Type:      database.UserPortalTypeThread,
+			Timestamp: time.Now(),
+		})
+		if metadata.MessageCount > 0 {
+			go thread.maybeInitialBackfill(source)
+		} else {
+			thread.initialBackfillAttempted = true
+		}
+	}
+}
+
+func (thread *Thread) maybeInitialBackfill(source *User) {
+	if thread.initialBackfillAttempted || thread.Parent.bridge.Config.Bridge.Backfill.Limits.Initial.Thread == 0 {
+		return
+	}
+	thread.Parent.forwardBackfillLock.Lock()
+	if thread.Parent.bridge.DB.Message.GetLastInThread(thread.Parent.Key, thread.ID) != nil {
+		thread.Parent.forwardBackfillLock.Unlock()
+		return
+	}
+	thread.Parent.forwardBackfillInitial(source, thread)
+}
+
 func (thread *Thread) Join(user *User) {
 	if user.IsInPortal(thread.ID) {
 		return
 	}
 	log := user.log.With().Str("thread_id", thread.ID).Str("channel_id", thread.ParentID).Logger()
 	log.Debug().Msg("Joining thread")
+
+	var doBackfill, backfillStarted bool
+	if !thread.initialBackfillAttempted && thread.Parent.bridge.Config.Bridge.Backfill.Limits.Initial.Thread > 0 {
+		thread.Parent.forwardBackfillLock.Lock()
+		lastMessage := thread.Parent.bridge.DB.Message.GetLastInThread(thread.Parent.Key, thread.ID)
+		if lastMessage != nil {
+			thread.Parent.forwardBackfillLock.Unlock()
+		} else {
+			doBackfill = true
+			defer func() {
+				if !backfillStarted {
+					thread.Parent.forwardBackfillLock.Unlock()
+				}
+			}()
+		}
+	}
+
 	var err error
 	if user.Session.IsUser {
 		err = user.Session.ThreadJoinWithLocation(thread.ID, discordgo.ThreadJoinLocationContextMenu)
@@ -94,5 +149,9 @@ func (thread *Thread) Join(user *User) {
 			Type:      database.UserPortalTypeThread,
 			Timestamp: time.Now(),
 		})
+		if doBackfill {
+			go thread.Parent.forwardBackfillInitial(user, thread)
+			backfillStarted = true
+		}
 	}
 }

user.go

@@ -1,11 +1,13 @@
 package main
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"math/rand"
 	"net/http"
 	"os"
+	"sort"
 	"strconv"
 	"strings"
 	"sync"
@@ -15,6 +17,7 @@ import (
 	"github.com/bwmarrin/discordgo"
 	"github.com/gorilla/websocket"
 	"github.com/rs/zerolog"
+	"maunium.net/go/mautrix/util/dbutil"
 
 	"maunium.net/go/mautrix"
 	"maunium.net/go/mautrix/appservice"
@@ -61,6 +64,8 @@ type User struct {
 	pendingInteractionsLock sync.Mutex
 
 	nextDiscordUploadID atomic.Int32
+
+	relationships map[string]*discordgo.Relationship
 }
 
 func (user *User) GetRemoteID() string {
@@ -69,6 +74,9 @@ func (user *User) GetRemoteID() string {
 
 func (user *User) GetRemoteName() string {
 	if user.Session != nil && user.Session.State != nil && user.Session.State.User != nil {
+		if user.Session.State.User.Discriminator == "0" {
+			return fmt.Sprintf("@%s", user.Session.State.User.Username)
+		}
 		return fmt.Sprintf("%s#%s", user.Session.State.User.Username, user.Session.State.User.Discriminator)
 	}
 	return user.DiscordID
@@ -76,20 +84,24 @@ func (user *User) GetRemoteName() string {
 
 var discordLog zerolog.Logger
 
+func discordToZeroLevel(level int) zerolog.Level {
+	switch level {
+	case discordgo.LogError:
+		return zerolog.ErrorLevel
+	case discordgo.LogWarning:
+		return zerolog.WarnLevel
+	case discordgo.LogInformational:
+		return zerolog.InfoLevel
+	case discordgo.LogDebug:
+		fallthrough
+	default:
+		return zerolog.DebugLevel
+	}
+}
+
 func init() {
 	discordgo.Logger = func(msgL, caller int, format string, a ...interface{}) {
-		var level zerolog.Level
+		discordLog.WithLevel(discordToZeroLevel(msgL)).Caller(caller+1).Msgf(strings.TrimSpace(format), a...)
-		switch msgL {
-		case discordgo.LogError:
-			level = zerolog.ErrorLevel
-		case discordgo.LogWarning:
-			level = zerolog.WarnLevel
-		case discordgo.LogInformational:
-			level = zerolog.InfoLevel
-		case discordgo.LogDebug:
-			level = zerolog.DebugLevel
-		}
-		discordLog.WithLevel(level).Caller(caller+1).Msgf(strings.TrimSpace(format), a...)
 	}
 }
 
@@ -178,6 +190,12 @@ func (br *DiscordBridge) GetUserByID(id string) *User {
 	return user
 }
 
+func (br *DiscordBridge) GetCachedUserByID(id string) *User {
+	br.usersLock.Lock()
+	defer br.usersLock.Unlock()
+	return br.usersByID[id]
+}
+
 func (br *DiscordBridge) NewUser(dbUser *database.User) *User {
 	user := &User{
 		User:   dbUser,
@@ -188,6 +206,8 @@ func (br *DiscordBridge) NewUser(dbUser *database.User) *User {
 		PermissionLevel: br.Config.Bridge.Permissions.Get(dbUser.MXID),
 
 		pendingInteractions: make(map[string]*WrappedCommandEvent),
+
+		relationships: make(map[string]*discordgo.Relationship),
 	}
 	user.nextDiscordUploadID.Store(rand.Int31n(100))
 	user.BridgeState = br.NewBridgeStateQueue(user)
@@ -241,7 +261,7 @@ func (user *User) startupTryConnect(retryCount int) {
 		user.log.Error().Err(err).Msg("Error connecting on startup")
 		closeErr := &websocket.CloseError{}
 		if errors.As(err, &closeErr) && closeErr.Code == 4004 {
-			user.invalidAuthHandler(nil, nil)
+			user.invalidAuthHandler(nil)
 		} else if retryCount < 6 {
 			user.BridgeState.Send(status.BridgeState{StateEvent: status.StateTransientDisconnect, Error: "dc-unknown-websocket-error", Message: err.Error()})
 			retryInSeconds := 2 << retryCount
@@ -323,7 +343,7 @@ func (user *User) getSpaceRoom(ptr *id.RoomID, name, topic string, parent id.Roo
 	} else {
 		*ptr = resp.RoomID
 		user.Update()
-		user.ensureInvited(nil, *ptr, false)
+		user.ensureInvited(nil, *ptr, false, true)
 
 		if parent != "" {
 			_, err = user.bridge.Bot.SendStateEvent(parent, event.StateSpaceChild, resp.RoomID.String(), &event.SpaceChildEventContent{
@@ -429,7 +449,7 @@ func (user *User) syncChatDoublePuppetDetails(portal *Portal, justCreated bool)
 	}
 
 	// TODO sync mute status properly
-	if portal.GuildID != "" && user.bridge.Config.Bridge.MuteChannelsOnCreate {
+	if portal.GuildID != "" && user.bridge.Config.Bridge.MuteChannelsOnCreate && justCreated {
 		user.mutePortal(doublePuppetIntent, portal, false)
 	}
 }
@@ -555,44 +575,94 @@ func (user *User) Connect() error {
 	// TODO move to config
 	if os.Getenv("DISCORD_DEBUG") == "1" {
 		session.LogLevel = discordgo.LogDebug
+	} else {
+		session.LogLevel = discordgo.LogInformational
+	}
+	userDiscordLog := user.log.With().Str("component", "discordgo").Logger()
+	session.Logger = func(msgL, caller int, format string, a ...interface{}) {
+		userDiscordLog.WithLevel(discordToZeroLevel(msgL)).Caller(caller+1).Msgf(strings.TrimSpace(format), a...)
 	}
 	if !session.IsUser {
 		session.Identify.Intents = BotIntents
 	}
+	session.EventHandler = user.eventHandlerSync
 
 	user.Session = session
 
-	user.Session.AddHandler(user.readyHandler)
-	user.Session.AddHandler(user.resumeHandler)
-	user.Session.AddHandler(user.connectedHandler)
-	user.Session.AddHandler(user.disconnectedHandler)
-	user.Session.AddHandler(user.invalidAuthHandler)
-
-	user.Session.AddHandler(user.guildCreateHandler)
-	user.Session.AddHandler(user.guildDeleteHandler)
-	user.Session.AddHandler(user.guildUpdateHandler)
-	user.Session.AddHandler(user.guildRoleCreateHandler)
-	user.Session.AddHandler(user.guildRoleUpdateHandler)
-	user.Session.AddHandler(user.guildRoleDeleteHandler)
-
-	user.Session.AddHandler(user.channelCreateHandler)
-	user.Session.AddHandler(user.channelDeleteHandler)
-	user.Session.AddHandler(user.channelPinsUpdateHandler)
-	user.Session.AddHandler(user.channelUpdateHandler)
-
-	user.Session.AddHandler(user.messageCreateHandler)
-	user.Session.AddHandler(user.messageDeleteHandler)
-	user.Session.AddHandler(user.messageUpdateHandler)
-	user.Session.AddHandler(user.reactionAddHandler)
-	user.Session.AddHandler(user.reactionRemoveHandler)
-	user.Session.AddHandler(user.messageAckHandler)
-	user.Session.AddHandler(user.typingStartHandler)
-
-	user.Session.AddHandler(user.interactionSuccessHandler)
-
 	return user.Session.Open()
 }
 
+func (user *User) eventHandlerSync(rawEvt any) {
+	go user.eventHandler(rawEvt)
+}
+
+func (user *User) eventHandler(rawEvt any) {
+	switch evt := rawEvt.(type) {
+	case *discordgo.Ready:
+		user.readyHandler(evt)
+	case *discordgo.Resumed:
+		user.resumeHandler(evt)
+	case *discordgo.Connect:
+		user.connectedHandler(evt)
+	case *discordgo.Disconnect:
+		user.disconnectedHandler(evt)
+	case *discordgo.InvalidAuth:
+		user.invalidAuthHandler(evt)
+	case *discordgo.GuildCreate:
+		user.guildCreateHandler(evt)
+	case *discordgo.GuildDelete:
+		user.guildDeleteHandler(evt)
+	case *discordgo.GuildUpdate:
+		user.guildUpdateHandler(evt)
+	case *discordgo.GuildRoleCreate:
+		user.discordRoleToDB(evt.GuildID, evt.Role, nil, nil)
+	case *discordgo.GuildRoleUpdate:
+		user.discordRoleToDB(evt.GuildID, evt.Role, nil, nil)
+	case *discordgo.GuildRoleDelete:
+		user.bridge.DB.Role.DeleteByID(evt.GuildID, evt.RoleID)
+	case *discordgo.ChannelCreate:
+		user.channelCreateHandler(evt)
+	case *discordgo.ChannelDelete:
+		user.channelDeleteHandler(evt)
+	case *discordgo.ChannelUpdate:
+		user.channelUpdateHandler(evt)
+	case *discordgo.ChannelRecipientAdd:
+		user.channelRecipientAdd(evt)
+	case *discordgo.ChannelRecipientRemove:
+		user.channelRecipientRemove(evt)
+	case *discordgo.RelationshipAdd:
+		user.relationshipAddHandler(evt)
+	case *discordgo.RelationshipRemove:
+		user.relationshipRemoveHandler(evt)
+	case *discordgo.RelationshipUpdate:
+		user.relationshipUpdateHandler(evt)
+	case *discordgo.MessageCreate:
+		user.pushPortalMessage(evt, "message create", evt.ChannelID, evt.GuildID)
+	case *discordgo.MessageDelete:
+		user.pushPortalMessage(evt, "message delete", evt.ChannelID, evt.GuildID)
+	case *discordgo.MessageDeleteBulk:
+		user.pushPortalMessage(evt, "bulk message delete", evt.ChannelID, evt.GuildID)
+	case *discordgo.MessageUpdate:
+		user.pushPortalMessage(evt, "message update", evt.ChannelID, evt.GuildID)
+	case *discordgo.MessageReactionAdd:
+		user.pushPortalMessage(evt, "reaction add", evt.ChannelID, evt.GuildID)
+	case *discordgo.MessageReactionRemove:
+		user.pushPortalMessage(evt, "reaction remove", evt.ChannelID, evt.GuildID)
+	case *discordgo.MessageAck:
+		user.messageAckHandler(evt)
+	case *discordgo.TypingStart:
+		user.typingStartHandler(evt)
+	case *discordgo.InteractionSuccess:
+		user.interactionSuccessHandler(evt)
+	case *discordgo.ThreadListSync:
+		user.threadListSyncHandler(evt)
+	case *discordgo.Event:
+		// Ignore
+	default:
+		user.log.Debug().Type("event_type", evt).Msg("Unhandled event")
+	}
+}
+
 func (user *User) Disconnect() error {
 	user.Lock()
 	defer user.Unlock()
@@ -619,7 +689,24 @@ func (user *User) getGuildBridgingMode(guildID string) database.GuildBridgingMod
 	return guild.BridgingMode
 }
 
-func (user *User) readyHandler(_ *discordgo.Session, r *discordgo.Ready) {
+type ChannelSlice []*discordgo.Channel
+
+func (s ChannelSlice) Len() int {
+	return len(s)
+}
+
+func (s ChannelSlice) Less(i, j int) bool {
+	if s[i].Position != 0 || s[j].Position != 0 {
+		return s[i].Position < s[j].Position
+	}
+	return compareMessageIDs(s[i].LastMessageID, s[j].LastMessageID) == 1
+}
+
+func (s ChannelSlice) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}
+
+func (user *User) readyHandler(r *discordgo.Ready) {
 	user.log.Debug().Msg("Discord connection ready")
 	user.bridgeStateLock.Lock()
 	user.wasLoggedOut = false
@@ -642,6 +729,10 @@ func (user *User) readyHandler(_ *discordgo.Session, r *discordgo.Ready) {
 	user.BridgeState.Send(status.BridgeState{StateEvent: status.StateBackfilling})
 	user.tryAutomaticDoublePuppeting()
 
+	for _, relationship := range r.Relationships {
+		user.relationships[relationship.ID] = relationship
+	}
+
 	updateTS := time.Now()
 	portalsInSpace := make(map[string]bool)
 	for _, guild := range user.GetPortals() {
@@ -650,6 +741,8 @@ func (user *User) readyHandler(_ *discordgo.Session, r *discordgo.Ready) {
 	for _, guild := range r.Guilds {
 		user.handleGuild(guild, updateTS, portalsInSpace[guild.ID])
 	}
+	// The private channel list doesn't seem to be sorted by default, so sort it by message IDs (highest=newest first)
+	sort.Sort(ChannelSlice(r.PrivateChannels))
 	for i, ch := range r.PrivateChannels {
 		portal := user.GetPortalByMeta(ch)
 		user.handlePrivateChannel(portal, ch, updateTS, i < user.bridge.Config.Bridge.PrivateChannelCreateLimit, portalsInSpace[portal.Key.ChannelID])
@@ -659,7 +752,7 @@ func (user *User) readyHandler(_ *discordgo.Session, r *discordgo.Ready) {
 	if r.ReadState != nil && r.ReadState.Version > user.ReadStateVersion {
 		// TODO can we figure out which read states are actually new?
 		for _, entry := range r.ReadState.Entries {
-			user.messageAckHandler(nil, &discordgo.MessageAck{
+			user.messageAckHandler(&discordgo.MessageAck{
 				MessageID: string(entry.LastMessageID),
 				ChannelID: entry.ID,
 			})
@@ -696,7 +789,7 @@ func (user *User) subscribeGuilds(delay time.Duration) {
 	}
 }
 
-func (user *User) resumeHandler(_ *discordgo.Session, r *discordgo.Resumed) {
+func (user *User) resumeHandler(_ *discordgo.Resumed) {
 	user.log.Debug().Msg("Discord connection resumed")
 	user.subscribeGuilds(0 * time.Second)
 }
@@ -718,6 +811,55 @@ func (user *User) addPrivateChannelToSpace(portal *Portal) bool {
 	}
 }
 
+func (user *User) relationshipAddHandler(r *discordgo.RelationshipAdd) {
+	user.log.Debug().Interface("relationship", r.Relationship).Msg("Relationship added")
+	user.relationships[r.ID] = r.Relationship
+	user.handleRelationshipChange(r.ID, r.Nickname)
+}
+
+func (user *User) relationshipUpdateHandler(r *discordgo.RelationshipUpdate) {
+	user.log.Debug().Interface("relationship", r.Relationship).Msg("Relationship update")
+	user.relationships[r.ID] = r.Relationship
+	user.handleRelationshipChange(r.ID, r.Nickname)
+}
+
+func (user *User) relationshipRemoveHandler(r *discordgo.RelationshipRemove) {
+	user.log.Debug().Str("other_user_id", r.ID).Msg("Relationship removed")
+	delete(user.relationships, r.ID)
+	user.handleRelationshipChange(r.ID, "")
+}
+
+func (user *User) handleRelationshipChange(userID, nickname string) {
+	puppet := user.bridge.GetPuppetByID(userID)
+	portal := user.FindPrivateChatWith(userID)
+	if portal == nil || puppet == nil {
+		return
+	}
+
+	updated := portal.FriendNick == (nickname != "")
+	portal.FriendNick = nickname != ""
+	if nickname != "" {
+		updated = portal.UpdateNameDirect(nickname, true)
+	} else if portal.Name != puppet.Name {
+		if portal.shouldSetDMRoomMetadata() {
+			updated = portal.UpdateNameDirect(puppet.Name, false)
+		} else if portal.NameSet {
+			_, err := portal.MainIntent().SendStateEvent(portal.MXID, event.StateRoomName, "", map[string]any{})
+			if err != nil {
+				portal.log.Warn().Err(err).Msg("Failed to clear room name after friend nickname was removed")
+			} else {
+				portal.log.Debug().Msg("Cleared room name after friend nickname was removed")
+				portal.NameSet = false
+				portal.Update()
+				updated = true
+			}
+		}
+	}
+	if !updated {
+		portal.Update()
+	}
+}
+
 func (user *User) handlePrivateChannel(portal *Portal, meta *discordgo.Channel, timestamp time.Time, create, isInSpace bool) {
 	if create && portal.MXID == "" {
 		err := portal.CreateMatrixRoom(user, meta)
@@ -728,6 +870,7 @@ func (user *User) handlePrivateChannel(portal *Portal, meta *discordgo.Channel,
 		}
 	} else {
 		portal.UpdateInfo(user, meta)
+		portal.ForwardBackfillMissed(user, meta.LastMessageID, nil)
 	}
 	user.MarkInPortal(database.UserPortal{
 		DiscordID: portal.Key.ChannelID,
@@ -759,7 +902,7 @@ func (user *User) addGuildToSpace(guild *Guild, isInSpace bool, timestamp time.T
 	return isInSpace
 }
 
-func (user *User) discordRoleToDB(guildID string, role *discordgo.Role, dbRole *database.Role) (*database.Role, bool) {
+func (user *User) discordRoleToDB(guildID string, role *discordgo.Role, dbRole *database.Role, txn dbutil.Execable) bool {
 	var changed bool
 	if dbRole == nil {
 		dbRole = user.bridge.DB.Role.New()
@@ -777,7 +920,10 @@ func (user *User) discordRoleToDB(guildID string, role *discordgo.Role, dbRole *
 			dbRole.Permissions != role.Permissions
 	}
 	dbRole.Role = *role
-	return dbRole, changed
+	if changed {
+		dbRole.Upsert(txn)
+	}
+	return changed
 }
 
 func (user *User) handleGuildRoles(guildID string, newRoles []*discordgo.Role) {
@@ -792,11 +938,8 @@ func (user *User) handleGuildRoles(guildID string, newRoles []*discordgo.Role) {
 		panic(err)
 	}
 	for _, role := range newRoles {
-		dbRole, changed := user.discordRoleToDB(guildID, role, existingRoleMap[role.ID])
+		user.discordRoleToDB(guildID, role, existingRoleMap[role.ID], txn)
 		delete(existingRoleMap, role.ID)
-		if changed {
-			dbRole.Upsert(txn)
-		}
 	}
 	for _, removeRole := range existingRoleMap {
 		removeRole.Delete(txn)
@@ -812,20 +955,6 @@ func (user *User) handleGuildRoles(guildID string, newRoles []*discordgo.Role) {
 	}
 }
 
-func (user *User) guildRoleCreateHandler(_ *discordgo.Session, r *discordgo.GuildRoleCreate) {
-	dbRole, _ := user.discordRoleToDB(r.GuildID, r.Role, nil)
-	dbRole.Upsert(nil)
-}
-
-func (user *User) guildRoleUpdateHandler(_ *discordgo.Session, r *discordgo.GuildRoleUpdate) {
-	dbRole, _ := user.discordRoleToDB(r.GuildID, r.Role, nil)
-	dbRole.Upsert(nil)
-}
-
-func (user *User) guildRoleDeleteHandler(_ *discordgo.Session, r *discordgo.GuildRoleDelete) {
-	user.bridge.DB.Role.DeleteByID(r.GuildID, r.RoleID)
-}
-
 func (user *User) handleGuild(meta *discordgo.Guild, timestamp time.Time, isInSpace bool) {
 	guild := user.bridge.GetGuildByID(meta.ID, true)
 	guild.UpdateInfo(user, meta)
@@ -842,6 +971,9 @@ func (user *User) handleGuild(meta *discordgo.Guild, timestamp time.Time, isInSp
 				}
 			} else {
 				portal.UpdateInfo(user, ch)
+				if user.bridge.Config.Bridge.Backfill.MaxGuildMembers < 0 || meta.MemberCount < user.bridge.Config.Bridge.Backfill.MaxGuildMembers {
+					portal.ForwardBackfillMissed(user, ch.LastMessageID, nil)
+				}
 			}
 		}
 	}
@@ -851,7 +983,7 @@ func (user *User) handleGuild(meta *discordgo.Guild, timestamp time.Time, isInSp
 	user.addGuildToSpace(guild, isInSpace, timestamp)
 }
 
-func (user *User) connectedHandler(_ *discordgo.Session, _ *discordgo.Connect) {
+func (user *User) connectedHandler(_ *discordgo.Connect) {
 	user.bridgeStateLock.Lock()
 	defer user.bridgeStateLock.Unlock()
 	user.log.Debug().Msg("Connected to Discord")
@@ -861,7 +993,7 @@ func (user *User) connectedHandler(_ *discordgo.Session, _ *discordgo.Connect) {
 	}
 }
 
-func (user *User) disconnectedHandler(_ *discordgo.Session, _ *discordgo.Disconnect) {
+func (user *User) disconnectedHandler(_ *discordgo.Disconnect) {
 	user.bridgeStateLock.Lock()
 	defer user.bridgeStateLock.Unlock()
 	if user.wasLoggedOut {
@@ -873,7 +1005,7 @@ func (user *User) disconnectedHandler(_ *discordgo.Session, _ *discordgo.Disconn
 	user.BridgeState.Send(status.BridgeState{StateEvent: status.StateTransientDisconnect, Error: "dc-transient-disconnect", Message: "Temporarily disconnected from Discord, trying to reconnect"})
 }
 
-func (user *User) invalidAuthHandler(_ *discordgo.Session, _ *discordgo.InvalidAuth) {
+func (user *User) invalidAuthHandler(_ *discordgo.InvalidAuth) {
 	user.bridgeStateLock.Lock()
 	defer user.bridgeStateLock.Unlock()
 	user.log.Info().Msg("Got logged out from Discord due to invalid token")
@@ -882,7 +1014,7 @@ func (user *User) invalidAuthHandler(_ *discordgo.Session, _ *discordgo.InvalidA
 	go user.Logout(false)
 }
 
-func (user *User) guildCreateHandler(_ *discordgo.Session, g *discordgo.GuildCreate) {
+func (user *User) guildCreateHandler(g *discordgo.GuildCreate) {
 	user.log.Info().
 		Str("guild_id", g.ID).
 		Str("name", g.Name).
@@ -891,7 +1023,11 @@ func (user *User) guildCreateHandler(_ *discordgo.Session, g *discordgo.GuildCre
 	user.handleGuild(g.Guild, time.Now(), false)
 }
 
-func (user *User) guildDeleteHandler(_ *discordgo.Session, g *discordgo.GuildDelete) {
+func (user *User) guildDeleteHandler(g *discordgo.GuildDelete) {
+	if g.Unavailable {
+		user.log.Info().Str("guild_id", g.ID).Msg("Ignoring guild delete event with unavailable flag")
+		return
+	}
 	user.log.Info().Str("guild_id", g.ID).Msg("Got guild delete event")
 	user.MarkNotInPortal(g.ID)
 	guild := user.bridge.GetGuildByID(g.ID, false)
@@ -907,12 +1043,36 @@ func (user *User) guildDeleteHandler(_ *discordgo.Session, g *discordgo.GuildDel
 	}
 }
 
-func (user *User) guildUpdateHandler(_ *discordgo.Session, g *discordgo.GuildUpdate) {
+func (user *User) guildUpdateHandler(g *discordgo.GuildUpdate) {
 	user.log.Debug().Str("guild_id", g.ID).Msg("Got guild update event")
 	user.handleGuild(g.Guild, time.Now(), user.IsInSpace(g.ID))
 }
 
-func (user *User) channelCreateHandler(_ *discordgo.Session, c *discordgo.ChannelCreate) {
+func (user *User) threadListSyncHandler(t *discordgo.ThreadListSync) {
+	for _, meta := range t.Threads {
+		log := user.log.With().
+			Str("action", "thread list sync").
+			Str("guild_id", t.GuildID).
+			Str("parent_id", meta.ParentID).
+			Str("thread_id", meta.ID).
+			Logger()
+		ctx := log.WithContext(context.Background())
+		thread := user.bridge.GetThreadByID(meta.ID, nil)
+		if thread == nil {
+			msg := user.bridge.DB.Message.GetByDiscordID(database.NewPortalKey(meta.ParentID, ""), meta.ID)
+			if len(msg) == 0 {
+				log.Debug().Msg("Found unknown thread in thread list sync and don't have message")
+			} else {
+				log.Debug().Msg("Found unknown thread in thread list sync for existing message, creating thread")
+				user.bridge.threadFound(ctx, user, msg[0], meta.ID, meta)
+			}
+		} else {
+			thread.Parent.ForwardBackfillMissed(user, meta.LastMessageID, thread)
+		}
+	}
+}
+
+func (user *User) channelCreateHandler(c *discordgo.ChannelCreate) {
 	if user.getGuildBridgingMode(c.GuildID) < database.GuildBridgeEverything {
 		user.log.Debug().
 			Str("guild_id", c.GuildID).Str("channel_id", c.ID).
@@ -942,7 +1102,7 @@ func (user *User) channelCreateHandler(_ *discordgo.Session, c *discordgo.Channe
 	}
 }
 
-func (user *User) channelDeleteHandler(_ *discordgo.Session, c *discordgo.ChannelDelete) {
+func (user *User) channelDeleteHandler(c *discordgo.ChannelDelete) {
 	portal := user.GetExistingPortalByID(c.ID)
 	if portal == nil {
 		user.log.Debug().
@@ -963,11 +1123,7 @@ func (user *User) channelDeleteHandler(_ *discordgo.Session, c *discordgo.Channe
 		Msg("Completed cleaning up channel")
 }
 
-func (user *User) channelPinsUpdateHandler(_ *discordgo.Session, c *discordgo.ChannelPinsUpdate) {
+func (user *User) channelUpdateHandler(c *discordgo.ChannelUpdate) {
-	user.log.Debug().Msg("channel pins update")
-}
-
-func (user *User) channelUpdateHandler(_ *discordgo.Session, c *discordgo.ChannelUpdate) {
 	portal := user.GetPortalByMeta(c.Channel)
 	if c.GuildID == "" {
 		user.handlePrivateChannel(portal, c.Channel, time.Now(), true, user.IsInSpace(portal.Key.String()))
@@ -976,6 +1132,20 @@ func (user *User) channelUpdateHandler(_ *discordgo.Session, c *discordgo.Channe
 	}
 }
 
+func (user *User) channelRecipientAdd(c *discordgo.ChannelRecipientAdd) {
+	portal := user.GetExistingPortalByID(c.ChannelID)
+	if portal != nil {
+		portal.syncParticipant(user, c.User, false)
+	}
+}
+
+func (user *User) channelRecipientRemove(c *discordgo.ChannelRecipientRemove) {
+	portal := user.GetExistingPortalByID(c.ChannelID)
+	if portal != nil {
+		portal.syncParticipant(user, c.User, true)
+	}
+}
+
 func (user *User) findPortal(channelID string) (*Portal, *Thread) {
 	portal := user.GetExistingPortalByID(channelID)
 	if portal != nil {
@@ -1033,31 +1203,21 @@ func (user *User) pushPortalMessage(msg interface{}, typeName, channelID, guildI
 		return
 	}
 
-	portal.discordMessages <- portalDiscordMessage{
+	wrappedMsg := portalDiscordMessage{
 		msg:    msg,
 		user:   user,
 		thread: thread,
 	}
-}
+	select {
-
+	case portal.discordMessages <- wrappedMsg:
-func (user *User) messageCreateHandler(_ *discordgo.Session, m *discordgo.MessageCreate) {
+	default:
-	user.pushPortalMessage(m, "message create", m.ChannelID, m.GuildID)
+		user.log.Warn().
-}
+			Str("discord_event", typeName).
-
+			Str("guild_id", guildID).
-func (user *User) messageDeleteHandler(_ *discordgo.Session, m *discordgo.MessageDelete) {
+			Str("channel_id", channelID).
-	user.pushPortalMessage(m, "message delete", m.ChannelID, m.GuildID)
+			Msg("Portal message buffer is full")
-}
+		portal.discordMessages <- wrappedMsg
-
+	}
-func (user *User) messageUpdateHandler(_ *discordgo.Session, m *discordgo.MessageUpdate) {
-	user.pushPortalMessage(m, "message update", m.ChannelID, m.GuildID)
-}
-
-func (user *User) reactionAddHandler(_ *discordgo.Session, m *discordgo.MessageReactionAdd) {
-	user.pushPortalMessage(m, "reaction add", m.ChannelID, m.GuildID)
-}
-
-func (user *User) reactionRemoveHandler(_ *discordgo.Session, m *discordgo.MessageReactionRemove) {
-	user.pushPortalMessage(m, "reaction remove", m.ChannelID, m.GuildID)
 }
 
 type CustomReadReceipt struct {
@@ -1084,7 +1244,7 @@ func (user *User) makeReadMarkerContent(eventID id.EventID) *CustomReadMarkers {
 	}
 }
 
-func (user *User) messageAckHandler(_ *discordgo.Session, m *discordgo.MessageAck) {
+func (user *User) messageAckHandler(m *discordgo.MessageAck) {
 	portal := user.GetExistingPortalByID(m.ChannelID)
 	if portal == nil || portal.MXID == "" {
 		return
@@ -1117,15 +1277,22 @@ func (user *User) messageAckHandler(_ *discordgo.Session, m *discordgo.MessageAc
 	}
 }
 
-func (user *User) typingStartHandler(_ *discordgo.Session, t *discordgo.TypingStart) {
+func (user *User) typingStartHandler(t *discordgo.TypingStart) {
+	if t.UserID == user.DiscordID {
+		return
+	}
 	portal := user.GetExistingPortalByID(t.ChannelID)
 	if portal == nil || portal.MXID == "" {
 		return
 	}
+	targetUser := user.bridge.GetCachedUserByID(t.UserID)
+	if targetUser != nil {
+		return
+	}
 	portal.handleDiscordTyping(t)
 }
 
-func (user *User) interactionSuccessHandler(_ *discordgo.Session, s *discordgo.InteractionSuccess) {
+func (user *User) interactionSuccessHandler(s *discordgo.InteractionSuccess) {
 	user.pendingInteractionsLock.Lock()
 	defer user.pendingInteractionsLock.Unlock()
 	ce, ok := user.pendingInteractions[s.Nonce]
@@ -1138,10 +1305,16 @@ func (user *User) interactionSuccessHandler(_ *discordgo.Session, s *discordgo.I
 	}
 }
 
-func (user *User) ensureInvited(intent *appservice.IntentAPI, roomID id.RoomID, isDirect bool) bool {
+func (user *User) ensureInvited(intent *appservice.IntentAPI, roomID id.RoomID, isDirect, ignoreCache bool) bool {
+	if roomID == "" {
+		return false
+	}
 	if intent == nil {
 		intent = user.bridge.Bot
 	}
+	if !ignoreCache && intent.StateStore.IsInvited(roomID, user.MXID) {
+		return true
+	}
 	ret := false
 
 	inviteContent := event.Content{
@@ -1280,6 +1453,8 @@ func (user *User) bridgeGuild(guildID string, everything bool) error {
 	}
 	if everything {
 		guild.BridgingMode = database.GuildBridgeEverything
+	} else {
+		guild.BridgingMode = database.GuildBridgeCreateOnMessage
 	}
 	guild.Update()