d82b74fb29
Added the necessary room capabilities, too. Support for replies, editing, deletion, and attachments are forthcoming.
105 lines
3.5 KiB
Go
105 lines
3.5 KiB
Go
// mautrix-discord - A Matrix-Discord puppeting bridge.
|
|
// Copyright (C) 2024 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
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
package msgconv
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"strconv"
|
|
"time"
|
|
|
|
"github.com/bwmarrin/discordgo"
|
|
"go.mau.fi/util/variationselector"
|
|
"maunium.net/go/mautrix/bridgev2"
|
|
"maunium.net/go/mautrix/event"
|
|
"maunium.net/go/mautrix/format"
|
|
)
|
|
|
|
const discordEpochMillis = 1420070400000
|
|
|
|
func generateMessageNonce() string {
|
|
snowflake := (time.Now().UnixMilli() - discordEpochMillis) << 22
|
|
// Nonce snowflakes don't have internal IDs or increments
|
|
return strconv.FormatInt(snowflake, 10)
|
|
}
|
|
|
|
func parseAllowedLinkPreviews(raw map[string]any) []string {
|
|
if raw == nil {
|
|
return nil
|
|
}
|
|
linkPreviews, ok := raw["com.beeper.linkpreviews"].([]any)
|
|
if !ok {
|
|
return nil
|
|
}
|
|
allowedLinkPreviews := make([]string, 0, len(linkPreviews))
|
|
for _, preview := range linkPreviews {
|
|
previewMap, ok := preview.(map[string]any)
|
|
if !ok {
|
|
continue
|
|
}
|
|
matchedURL, _ := previewMap["matched_url"].(string)
|
|
if matchedURL != "" {
|
|
allowedLinkPreviews = append(allowedLinkPreviews, matchedURL)
|
|
}
|
|
}
|
|
return allowedLinkPreviews
|
|
}
|
|
|
|
// ToDiscord converts a Matrix message into a discordgo.MessageSend that is appropriate
|
|
// for bridging the message to Discord.
|
|
func (mc *MessageConverter) ToDiscord(
|
|
ctx context.Context,
|
|
msg *bridgev2.MatrixMessage,
|
|
) (discordgo.MessageSend, error) {
|
|
var req discordgo.MessageSend
|
|
req.Nonce = generateMessageNonce()
|
|
|
|
switch msg.Content.MsgType {
|
|
case event.MsgText, event.MsgEmote, event.MsgNotice:
|
|
req.Content, req.AllowedMentions = mc.convertMatrixMessageContent(ctx, msg.Portal, msg.Content, parseAllowedLinkPreviews(msg.Event.Content.Raw))
|
|
if msg.Content.MsgType == event.MsgEmote {
|
|
req.Content = fmt.Sprintf("_%s_", req.Content)
|
|
}
|
|
// TODO: Handle attachments.
|
|
}
|
|
|
|
// TODO: Handle (silent) replies and allowed mentions.
|
|
|
|
return req, nil
|
|
}
|
|
|
|
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{},
|
|
RepliedUser: true,
|
|
}
|
|
|
|
if content.Format == event.FormatHTML && len(content.FormattedBody) > 0 {
|
|
ctx := format.NewContext(ctx)
|
|
ctx.ReturnData[formatterContextInputAllowedLinkPreviewsKey] = allowedLinkPreviews
|
|
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
|
|
}
|
|
}
|