Tulir Asokan
489 lines
14 KiB
Go
489 lines
14 KiB
Go
package connector
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import (
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"context"
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"crypto/sha256"
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"errors"
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"fmt"
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"math/rand"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/gotd/td/telegram/message"
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"github.com/gotd/td/telegram/uploader"
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"github.com/gotd/td/tg"
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"github.com/rs/zerolog"
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"maunium.net/go/mautrix/bridgev2"
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"maunium.net/go/mautrix/bridgev2/database"
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"maunium.net/go/mautrix/bridgev2/networkid"
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"maunium.net/go/mautrix/event"
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"maunium.net/go/mautrix/id"
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"go.mau.fi/util/variationselector"
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"go.mau.fi/mautrix-telegram/pkg/connector/emojis"
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"go.mau.fi/mautrix-telegram/pkg/connector/ids"
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"go.mau.fi/mautrix-telegram/pkg/connector/matrixfmt"
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"go.mau.fi/mautrix-telegram/pkg/connector/waveform"
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)
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func getMediaFilename(content *event.MessageEventContent) string {
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if content.FileName != "" {
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return content.FileName
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} else {
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return content.Body
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}
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}
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func (t *TelegramClient) transferMediaToTelegram(ctx context.Context, content *event.MessageEventContent) (tg.InputMediaClass, error) {
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filename := getMediaFilename(content)
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var fileData []byte
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fileData, err := t.main.Bridge.Bot.DownloadMedia(ctx, content.URL, content.File)
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if err != nil {
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return nil, fmt.Errorf("failed to download media from Matrix: %w", err)
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}
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uploader := uploader.NewUploader(t.client.API())
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var upload tg.InputFileClass
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upload, err = uploader.FromBytes(ctx, filename, fileData)
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if err != nil {
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return nil, fmt.Errorf("failed to upload media to Telegram: %w", err)
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}
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if content.MsgType == event.MsgImage && (content.Info.MimeType == "image/jpeg" || content.Info.MimeType == "image/png") {
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return &tg.InputMediaUploadedPhoto{File: upload}, nil
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}
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var attributes []tg.DocumentAttributeClass
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attributes = append(attributes, &tg.DocumentAttributeFilename{FileName: filename})
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if content.MsgType == event.MsgAudio {
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audioAttr := tg.DocumentAttributeAudio{
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Voice: content.MSC3245Voice != nil,
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}
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if content.MSC1767Audio != nil {
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audioAttr.Duration = content.MSC1767Audio.Duration / 1000
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if len(content.MSC1767Audio.Waveform) > 0 {
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audioAttr.Waveform = waveform.Encode(content.MSC1767Audio.Waveform)
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}
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}
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attributes = append(attributes, &audioAttr)
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}
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return &tg.InputMediaUploadedDocument{
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File: upload,
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MimeType: content.Info.MimeType,
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Attributes: attributes,
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}, nil
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}
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func (t *TelegramClient) HandleMatrixMessage(ctx context.Context, msg *bridgev2.MatrixMessage) (resp *bridgev2.MatrixMessageResponse, err error) {
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peer, err := t.inputPeerForPortalID(ctx, msg.Portal.ID)
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if err != nil {
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return nil, err
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}
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var contentURI id.ContentURIString
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// TODO handle sticker
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noWebpage := msg.Content.BeeperLinkPreviews != nil && len(msg.Content.BeeperLinkPreviews) == 0
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message, entities := matrixfmt.Parse(ctx, t.matrixParser, msg.Content)
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var replyTo tg.InputReplyToClass
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if msg.ReplyTo != nil {
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_, messageID, err := ids.ParseMessageID(msg.ReplyTo.ID)
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if err != nil {
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return nil, err
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}
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replyTo = &tg.InputReplyToMessage{ReplyToMsgID: messageID}
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}
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var updates tg.UpdatesClass
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switch msg.Content.MsgType {
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case event.MsgText, event.MsgNotice, event.MsgEmote:
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updates, err = t.client.API().MessagesSendMessage(ctx, &tg.MessagesSendMessageRequest{
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Peer: peer,
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NoWebpage: noWebpage,
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Message: message,
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Entities: entities,
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ReplyTo: replyTo,
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RandomID: rand.Int63(),
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})
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case event.MsgImage, event.MsgFile, event.MsgAudio, event.MsgVideo:
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var media tg.InputMediaClass
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media, err = t.transferMediaToTelegram(ctx, msg.Content)
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if err != nil {
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return nil, err
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}
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updates, err = t.client.API().MessagesSendMedia(ctx, &tg.MessagesSendMediaRequest{
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Peer: peer,
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Message: message,
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Entities: entities,
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Media: media,
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ReplyTo: replyTo,
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RandomID: rand.Int63(),
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})
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case event.MsgLocation:
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var uri GeoURI
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uri, err = ParseGeoURI(msg.Content.GeoURI)
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if err != nil {
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return nil, err
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}
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message = ""
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if location, ok := msg.Event.Content.Raw["org.matrix.msc3488.location"].(map[string]any); ok {
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if desc, ok := location["description"].(string); ok {
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message = desc
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}
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}
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updates, err = t.client.API().MessagesSendMedia(ctx, &tg.MessagesSendMediaRequest{
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Peer: peer,
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Message: message,
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Media: &tg.InputMediaGeoPoint{
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GeoPoint: &tg.InputGeoPoint{Lat: uri.Lat, Long: uri.Long},
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},
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ReplyTo: replyTo,
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RandomID: rand.Int63(),
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})
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default:
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return nil, fmt.Errorf("unsupported message type %s", msg.Content.MsgType)
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}
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if err != nil {
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return nil, err
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}
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hasher := sha256.New()
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var tgMessageID, tgDate int
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switch sentMessage := updates.(type) {
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case *tg.UpdateShortSentMessage:
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tgMessageID = sentMessage.ID
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tgDate = sentMessage.Date
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hasher.Write([]byte(msg.Content.Body))
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case *tg.Updates:
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tgDate = sentMessage.Date
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for _, u := range sentMessage.Updates {
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switch update := u.(type) {
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case *tg.UpdateMessageID:
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tgMessageID = update.ID
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case *tg.UpdateNewMessage:
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msg := update.Message.(*tg.Message)
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hasher.Write([]byte(msg.Message))
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hasher.Write(mediaHashID(msg.Media))
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}
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}
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if tgMessageID == 0 {
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return nil, fmt.Errorf("couldn't find update message ID update")
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}
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default:
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return nil, fmt.Errorf("unknown update from message response %T", updates)
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}
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resp = &bridgev2.MatrixMessageResponse{
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DB: &database.Message{
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ID: ids.MakeMessageID(msg.Portal.PortalKey, tgMessageID),
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MXID: msg.Event.ID,
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Room: msg.Portal.PortalKey,
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SenderID: t.userID,
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Timestamp: time.Unix(int64(tgDate), 0),
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Metadata: &MessageMetadata{
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ContentHash: hasher.Sum(nil),
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ContentURI: contentURI,
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},
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},
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}
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return
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}
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func (t *TelegramClient) HandleMatrixEdit(ctx context.Context, msg *bridgev2.MatrixEdit) error {
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log := zerolog.Ctx(ctx).With().
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Str("conversion_direction", "to_telegram").
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Str("handler", "matrix_edit").
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Logger()
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peer, err := t.inputPeerForPortalID(ctx, msg.Portal.ID)
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if err != nil {
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return err
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}
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_, targetID, err := ids.ParseMessageID(msg.EditTarget.ID)
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if err != nil {
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return err
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}
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message, entities := matrixfmt.Parse(ctx, t.matrixParser, msg.Content)
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var newContentURI id.ContentURIString
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req := tg.MessagesEditMessageRequest{
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Peer: peer,
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NoWebpage: msg.Content.BeeperLinkPreviews != nil && len(msg.Content.BeeperLinkPreviews) == 0,
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Message: message,
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Entities: entities,
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ID: targetID,
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}
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if msg.Content.MsgType.IsMedia() {
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newContentURI = msg.Content.URL
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if newContentURI == "" {
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newContentURI = msg.Content.File.URL
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}
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if msg.EditTarget.Metadata.(*MessageMetadata).ContentURI == newContentURI {
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log.Info().Msg("media URI unchanged, skipping re-upload, just editing text")
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} else {
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log.Info().Msg("media URI changed, re-uploading media")
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req.Media, err = t.transferMediaToTelegram(ctx, msg.Content)
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if err != nil {
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return err
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}
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}
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} else if !msg.Content.MsgType.IsText() {
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return fmt.Errorf("editing message type %s is unsupported", msg.Content.MsgType)
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}
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updates, err := t.client.API().MessagesEditMessage(ctx, &req)
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if err != nil {
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return err
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}
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hasher := sha256.New()
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switch sentMessage := updates.(type) {
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case *tg.UpdateShortSentMessage:
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hasher.Write([]byte(msg.Content.Body))
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case *tg.Updates:
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for _, u := range sentMessage.Updates {
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switch update := u.(type) {
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case *tg.UpdateNewMessage:
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msg := update.Message.(*tg.Message)
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hasher.Write([]byte(msg.Message))
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hasher.Write(mediaHashID(msg.Media))
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}
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}
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default:
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return fmt.Errorf("unknown update from message response %T", updates)
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}
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metadata := msg.EditTarget.Metadata.(*MessageMetadata)
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metadata.ContentHash = hasher.Sum(nil)
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metadata.ContentURI = newContentURI
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return nil
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}
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func (t *TelegramClient) HandleMatrixMessageRemove(ctx context.Context, msg *bridgev2.MatrixMessageRemove) error {
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if dbMsg, err := t.main.Bridge.DB.Message.GetPartByMXID(ctx, msg.TargetMessage.MXID); err != nil {
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return err
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} else if _, messageID, err := ids.ParseMessageID(dbMsg.ID); err != nil {
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return err
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} else if peer, err := t.inputPeerForPortalID(ctx, msg.Portal.ID); err != nil {
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return err
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} else {
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_, err := message.NewSender(t.client.API()).
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To(peer).
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Revoke().
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Messages(ctx, messageID)
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return err
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}
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}
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func (t *TelegramClient) PreHandleMatrixReaction(ctx context.Context, msg *bridgev2.MatrixReaction) (bridgev2.MatrixReactionPreResponse, error) {
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var resp bridgev2.MatrixReactionPreResponse
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var maxReactions int
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maxReactions, err := t.getReactionLimit(ctx, t.userID)
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if err != nil {
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return resp, err
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}
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var emojiID networkid.EmojiID
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if strings.HasPrefix(msg.Content.RelatesTo.Key, "mxc://") {
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if file, err := t.main.Store.TelegramFile.GetByMXC(ctx, msg.Content.RelatesTo.Key); err != nil {
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return resp, err
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} else if file == nil {
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return resp, fmt.Errorf("reaction MXC URI %s does not correspond with any known Telegram files", msg.Content.RelatesTo.Key)
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} else if documentID, err := strconv.ParseInt(string(file.LocationID), 10, 64); err != nil {
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return resp, err
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} else {
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emojiID = ids.MakeEmojiIDFromDocumentID(documentID)
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}
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} else if documentID, ok := emojis.GetEmojiDocumentID(msg.Content.RelatesTo.Key); ok {
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emojiID = ids.MakeEmojiIDFromDocumentID(documentID)
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} else {
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emojiID = ids.MakeEmojiIDFromEmoticon(msg.Content.RelatesTo.Key)
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}
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return bridgev2.MatrixReactionPreResponse{
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SenderID: t.userID,
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EmojiID: emojiID,
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Emoji: variationselector.FullyQualify(msg.Content.RelatesTo.Key),
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MaxReactions: maxReactions,
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}, nil
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}
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func (t *TelegramClient) appendEmojiID(reactionList []tg.ReactionClass, emojiID networkid.EmojiID) ([]tg.ReactionClass, error) {
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if documentID, emoticon, err := ids.ParseEmojiID(emojiID); err != nil {
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return nil, err
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} else if documentID > 0 {
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return append(reactionList, &tg.ReactionCustomEmoji{DocumentID: documentID}), nil
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} else {
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return append(reactionList, &tg.ReactionEmoji{Emoticon: emoticon}), nil
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}
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}
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func (t *TelegramClient) HandleMatrixReaction(ctx context.Context, msg *bridgev2.MatrixReaction) (reaction *database.Reaction, err error) {
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peer, err := t.inputPeerForPortalID(ctx, msg.Portal.ID)
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if err != nil {
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return nil, err
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}
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_, targetMessageID, err := ids.ParseMessageID(msg.TargetMessage.ID)
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if err != nil {
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return nil, err
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}
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var newReactions []tg.ReactionClass
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for _, existing := range msg.ExistingReactionsToKeep {
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newReactions, err = t.appendEmojiID(newReactions, existing.EmojiID)
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if err != nil {
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return nil, err
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}
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}
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newReactions, err = t.appendEmojiID(newReactions, msg.PreHandleResp.EmojiID)
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if err != nil {
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return nil, err
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}
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_, err = t.client.API().MessagesSendReaction(ctx, &tg.MessagesSendReactionRequest{
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Peer: peer,
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AddToRecent: true,
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MsgID: targetMessageID,
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Reaction: newReactions,
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})
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return &database.Reaction{}, err
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}
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func (t *TelegramClient) HandleMatrixReactionRemove(ctx context.Context, msg *bridgev2.MatrixReactionRemove) error {
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peer, err := t.inputPeerForPortalID(ctx, msg.Portal.ID)
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if err != nil {
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return err
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}
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var newReactions []tg.ReactionClass
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if maxReactions, err := t.getReactionLimit(ctx, t.userID); err != nil {
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return err
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} else if maxReactions > 1 {
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existing, err := t.main.Bridge.DB.Reaction.GetAllToMessageBySender(ctx, msg.TargetReaction.MessageID, msg.TargetReaction.SenderID)
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if err != nil {
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return err
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}
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for _, existing := range existing {
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if msg.TargetReaction.EmojiID != existing.EmojiID {
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newReactions, err = t.appendEmojiID(newReactions, existing.EmojiID)
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if err != nil {
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return err
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}
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}
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}
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}
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_, messageID, err := ids.ParseMessageID(msg.TargetReaction.MessageID)
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if err != nil {
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return err
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}
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_, err = t.client.API().MessagesSendReaction(ctx, &tg.MessagesSendReactionRequest{
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Peer: peer,
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AddToRecent: true,
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MsgID: messageID,
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Reaction: newReactions,
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})
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return err
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}
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func (t *TelegramClient) HandleMatrixReadReceipt(ctx context.Context, msg *bridgev2.MatrixReadReceipt) error {
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peerType, id, parseErr := ids.ParsePortalID(msg.Portal.ID)
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if parseErr != nil {
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return parseErr
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}
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inputPeer, parseErr := t.inputPeerForPortalID(ctx, msg.Portal.ID)
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if parseErr != nil {
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return parseErr
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}
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var readMentionsErr, readReactionsErr, readMessagesErr error
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var wg sync.WaitGroup
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// Read mentions
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wg.Add(1)
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go func() {
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defer wg.Done()
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_, readMentionsErr = t.client.API().MessagesReadMentions(ctx, &tg.MessagesReadMentionsRequest{
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Peer: inputPeer,
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})
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}()
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// Read reactions
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wg.Add(1)
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go func() {
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defer wg.Done()
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_, readMentionsErr = t.client.API().MessagesReadReactions(ctx, &tg.MessagesReadReactionsRequest{
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Peer: inputPeer,
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})
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}()
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// Read messages
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wg.Add(1)
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go func() {
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defer wg.Done()
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message := msg.ExactMessage
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if message == nil {
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message, readMessagesErr = t.main.Bridge.DB.Message.GetLastPartAtOrBeforeTime(ctx, msg.Portal.PortalKey, time.Now())
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if readMessagesErr != nil {
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return
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} else if message == nil {
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zerolog.Ctx(ctx).Warn().Msg("no message found to read")
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return
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}
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}
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var maxID int
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_, maxID, readMessagesErr = ids.ParseMessageID(message.ID)
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if readMessagesErr != nil {
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return
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}
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switch peerType {
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case ids.PeerTypeUser, ids.PeerTypeChat:
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_, readMessagesErr = t.client.API().MessagesReadHistory(ctx, &tg.MessagesReadHistoryRequest{
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Peer: inputPeer,
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MaxID: maxID,
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})
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case ids.PeerTypeChannel:
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var accessHash int64
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accessHash, readMessagesErr = t.ScopedStore.GetAccessHash(ctx, id)
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if readMessagesErr != nil {
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return
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}
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_, readMessagesErr = t.client.API().ChannelsReadHistory(ctx, &tg.ChannelsReadHistoryRequest{
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Channel: &tg.InputChannel{ChannelID: id, AccessHash: accessHash},
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})
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default:
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readMessagesErr = fmt.Errorf("unknown peer type %s", peerType)
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}
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}()
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// TODO handle sponsored message read receipts
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wg.Wait()
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return errors.Join(readMentionsErr, readReactionsErr, readMessagesErr)
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}
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func (t *TelegramClient) HandleMatrixTyping(ctx context.Context, msg *bridgev2.MatrixTyping) error {
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inputPeer, err := t.inputPeerForPortalID(ctx, msg.Portal.ID)
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if err != nil {
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return err
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}
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_, err = t.client.API().MessagesSetTyping(ctx, &tg.MessagesSetTypingRequest{
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Peer: inputPeer,
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Action: &tg.SendMessageTypingAction{},
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})
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return err
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}
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