handlematrix: bridge message edits

pkg/connector/capabilities.go

@@ -65,6 +65,7 @@ var discordCaps = &event.RoomFeatures{
 	ID:       capID(),
 	Reply:    event.CapLevelFullySupported,
 	Reaction: event.CapLevelFullySupported,
+	Edit:     event.CapLevelFullySupported,
 	Delete:   event.CapLevelFullySupported,
 	Formatting: event.FormattingFeatureMap{
 		event.FmtBold:               event.CapLevelFullySupported,
@@ -137,7 +138,6 @@ var discordCaps = &event.RoomFeatures{
 	LocationMessage: event.CapLevelUnsupported,
 	MaxTextLength:   MaxTextLength,
 	// TODO: Support threads.
-	// TODO: Support editing.
 }
 
 func (dc *DiscordClient) GetCapabilities(ctx context.Context, portal *bridgev2.Portal) *event.RoomFeatures {

pkg/connector/handlematrix.go

@@ -18,6 +18,7 @@ package connector
 
 import (
 	"context"
+	"fmt"
 	"time"
 
 	"github.com/bwmarrin/discordgo"
@@ -72,8 +73,28 @@ func (d *DiscordClient) HandleMatrixMessage(ctx context.Context, msg *bridgev2.M
 }
 
 func (d *DiscordClient) HandleMatrixEdit(ctx context.Context, msg *bridgev2.MatrixEdit) error {
-	//TODO implement me
-	panic("implement me")
+	log := zerolog.Ctx(ctx).With().Str("action", "matrix message edit").Logger()
+	ctx = log.WithContext(ctx)
+
+	content, _ := d.connector.MsgConv.ConvertMatrixMessageContent(
+		ctx,
+		msg.Portal,
+		msg.Content,
+		// Disregard link previews for now. Discord generally allows you to
+		// remove individual link previews from a message though.
+		[]string{},
+	)
+
+	_, err := d.Session.ChannelMessageEdit(
+		discordid.ParsePortalID(msg.Portal.ID),
+		discordid.ParseMessageID(msg.EditTarget.ID),
+		content,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to send message edit to discord: %w", err)
+	}
+
+	return nil
 }
 
 func (d *DiscordClient) PreHandleMatrixReaction(ctx context.Context, reaction *bridgev2.MatrixReaction) (bridgev2.MatrixReactionPreResponse, error) {

pkg/msgconv/from-matrix.go

@@ -112,7 +112,7 @@ func (mc *MessageConverter) ToDiscord(
 	content := msg.Content
 
 	convertMatrix := func() {
-		req.Content, req.AllowedMentions = mc.convertMatrixMessageContent(ctx, msg.Portal, content, parseAllowedLinkPreviews(msg.Event.Content.Raw))
+		req.Content, req.AllowedMentions = mc.ConvertMatrixMessageContent(ctx, msg.Portal, content, parseAllowedLinkPreviews(msg.Event.Content.Raw))
 		if content.MsgType == event.MsgEmote {
 			req.Content = fmt.Sprintf("_%s_", req.Content)
 		}
@@ -176,7 +176,7 @@ func (mc *MessageConverter) ToDiscord(
 	return &req, nil
 }
 
-func (mc *MessageConverter) convertMatrixMessageContent(ctx context.Context, portal *bridgev2.Portal, content *event.MessageEventContent, allowedLinkPreviews []string) (string, *discordgo.MessageAllowedMentions) {
+func (mc *MessageConverter) ConvertMatrixMessageContent(ctx context.Context, portal *bridgev2.Portal, content *event.MessageEventContent, allowedLinkPreviews []string) (string, *discordgo.MessageAllowedMentions) {
 	allowedMentions := &discordgo.MessageAllowedMentions{
 		Parse:       []discordgo.AllowedMentionType{},
 		Users:       []string{},