mautrix-whatsapp/portal.go

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// mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge.
// Copyright (C) 2018 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 main
import (
"bytes"
"encoding/hex"
"fmt"
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"html"
"image"
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"io"
"math/rand"
"mime"
"net/http"
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"regexp"
"strings"
"sync"
"github.com/Rhymen/go-whatsapp"
"maunium.net/go/gomatrix"
"maunium.net/go/gomatrix/format"
log "maunium.net/go/maulogger"
"maunium.net/go/mautrix-appservice"
"maunium.net/go/mautrix-whatsapp/database"
"maunium.net/go/mautrix-whatsapp/types"
"maunium.net/go/mautrix-whatsapp/whatsapp-ext"
)
func (user *User) GetPortalByMXID(mxid types.MatrixRoomID) *Portal {
user.portalsLock.Lock()
defer user.portalsLock.Unlock()
portal, ok := user.portalsByMXID[mxid]
if !ok {
dbPortal := user.bridge.DB.Portal.GetByMXID(mxid)
if dbPortal == nil || dbPortal.Owner != user.ID {
return nil
}
portal = user.NewPortal(dbPortal)
user.portalsByJID[portal.JID] = portal
if len(portal.MXID) > 0 {
user.portalsByMXID[portal.MXID] = portal
}
}
return portal
}
func (user *User) GetPortalByJID(jid types.WhatsAppID) *Portal {
user.portalsLock.Lock()
defer user.portalsLock.Unlock()
portal, ok := user.portalsByJID[jid]
if !ok {
dbPortal := user.bridge.DB.Portal.GetByJID(user.ID, jid)
if dbPortal == nil {
dbPortal = user.bridge.DB.Portal.New()
dbPortal.JID = jid
dbPortal.Owner = user.ID
dbPortal.Insert()
}
portal = user.NewPortal(dbPortal)
user.portalsByJID[portal.JID] = portal
if len(portal.MXID) > 0 {
user.portalsByMXID[portal.MXID] = portal
}
}
return portal
}
func (user *User) GetAllPortals() []*Portal {
user.portalsLock.Lock()
defer user.portalsLock.Unlock()
dbPortals := user.bridge.DB.Portal.GetAll(user.ID)
output := make([]*Portal, len(dbPortals))
for index, dbPortal := range dbPortals {
portal, ok := user.portalsByJID[dbPortal.JID]
if !ok {
portal = user.NewPortal(dbPortal)
user.portalsByJID[dbPortal.JID] = portal
if len(dbPortal.MXID) > 0 {
user.portalsByMXID[dbPortal.MXID] = portal
}
}
output[index] = portal
}
return output
}
func (user *User) NewPortal(dbPortal *database.Portal) *Portal {
return &Portal{
Portal: dbPortal,
user: user,
bridge: user.bridge,
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log: user.log.Sub(fmt.Sprintf("Portal/%s", dbPortal.JID)),
}
}
type Portal struct {
*database.Portal
user *User
bridge *Bridge
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log log.Logger
roomCreateLock sync.Mutex
}
func (portal *Portal) SyncParticipants(metadata *whatsapp_ext.GroupInfo) {
for _, participant := range metadata.Participants {
intent := portal.user.GetPuppetByJID(participant.JID).Intent()
intent.EnsureJoined(portal.MXID)
}
}
func (portal *Portal) UpdateAvatar() bool {
avatar, err := portal.user.Conn.GetProfilePicThumb(portal.JID)
if err != nil {
portal.log.Errorln(err)
return false
}
if portal.Avatar == avatar.Tag {
return false
}
data, err := avatar.DownloadBytes()
if err != nil {
portal.log.Errorln("Failed to download avatar:", err)
return false
}
mimeType := http.DetectContentType(data)
resp, err := portal.MainIntent().UploadBytes(data, mimeType)
if err != nil {
portal.log.Errorln("Failed to upload avatar:", err)
return false
}
_, err = portal.MainIntent().SetRoomAvatar(portal.MXID, resp.ContentURI)
if err != nil {
portal.log.Warnln("Failed to set room topic:", err)
return false
}
portal.Avatar = avatar.Tag
return true
}
func (portal *Portal) UpdateName(metadata *whatsapp_ext.GroupInfo) bool {
if portal.Name != metadata.Name {
_, err := portal.MainIntent().SetRoomName(portal.MXID, metadata.Name)
if err == nil {
portal.Name = metadata.Name
return true
}
portal.log.Warnln("Failed to set room name:", err)
}
return false
}
func (portal *Portal) UpdateTopic(metadata *whatsapp_ext.GroupInfo) bool {
if portal.Topic != metadata.Topic {
_, err := portal.MainIntent().SetRoomTopic(portal.MXID, metadata.Topic)
if err == nil {
portal.Topic = metadata.Topic
return true
}
portal.log.Warnln("Failed to set room topic:", err)
}
return false
}
func (portal *Portal) UpdateMetadata() bool {
metadata, err := portal.user.Conn.GetGroupMetaData(portal.JID)
if err != nil {
portal.log.Errorln(err)
return false
}
portal.SyncParticipants(metadata)
update := false
update = portal.UpdateName(metadata) || update
update = portal.UpdateTopic(metadata) || update
return update
}
func (portal *Portal) Sync(contact whatsapp.Contact) {
if len(portal.MXID) == 0 {
if !portal.IsPrivateChat() {
portal.Name = contact.Name
}
err := portal.CreateMatrixRoom()
if err != nil {
portal.log.Errorln("Failed to create portal room:", err)
return
}
}
if portal.IsPrivateChat() {
return
}
update := false
update = portal.UpdateMetadata() || update
update = portal.UpdateAvatar() || update
if update {
portal.Update()
}
}
func (portal *Portal) CreateMatrixRoom() error {
portal.roomCreateLock.Lock()
defer portal.roomCreateLock.Unlock()
if len(portal.MXID) > 0 {
return nil
}
name := portal.Name
topic := portal.Topic
isPrivateChat := false
invite := []string{portal.user.ID}
if portal.IsPrivateChat() {
name = ""
topic = "WhatsApp private chat"
isPrivateChat = true
}
resp, err := portal.MainIntent().CreateRoom(&gomatrix.ReqCreateRoom{
Visibility: "private",
Name: name,
Topic: topic,
Invite: invite,
Preset: "private_chat",
IsDirect: isPrivateChat,
})
if err != nil {
return err
}
portal.MXID = resp.RoomID
portal.Update()
return nil
}
func (portal *Portal) IsPrivateChat() bool {
return strings.HasSuffix(portal.JID, whatsapp_ext.NewUserSuffix)
}
func (portal *Portal) MainIntent() *appservice.IntentAPI {
if portal.IsPrivateChat() {
return portal.user.GetPuppetByJID(portal.JID).Intent()
}
return portal.bridge.AppService.BotIntent()
}
func (portal *Portal) IsDuplicate(id types.WhatsAppMessageID) bool {
msg := portal.bridge.DB.Message.GetByJID(portal.Owner, id)
if msg != nil {
return true
}
return false
}
func (portal *Portal) MarkHandled(jid types.WhatsAppMessageID, mxid types.MatrixEventID) {
msg := portal.bridge.DB.Message.New()
msg.Owner = portal.Owner
msg.JID = jid
msg.MXID = mxid
msg.Insert()
}
func (portal *Portal) GetMessageIntent(info whatsapp.MessageInfo) *appservice.IntentAPI {
if info.FromMe {
portal.log.Debugln("Unhandled message from me:", info.Id)
return nil
} else if portal.IsPrivateChat() {
return portal.MainIntent()
}
puppet := portal.user.GetPuppetByJID(info.SenderJid)
return puppet.Intent()
}
func (portal *Portal) SetReply(content *gomatrix.Content, info whatsapp.MessageInfo) {
if len(info.QuotedMessageID) == 0 {
return
}
message := portal.bridge.DB.Message.GetByJID(portal.Owner, info.QuotedMessageID)
if message != nil {
event, err := portal.MainIntent().GetEvent(portal.MXID, message.MXID)
if err != nil {
portal.log.Warnln("Failed to get reply target:", err)
return
}
content.SetReply(event)
}
return
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}
var codeBlockRegex = regexp.MustCompile("```((?:.|\n)+?)```")
var italicRegex = regexp.MustCompile("([\\s>~*]|^)_(.+?)_([^a-zA-Z\\d]|$)")
var boldRegex = regexp.MustCompile("([\\s>_~]|^)\\*(.+?)\\*([^a-zA-Z\\d]|$)")
var strikethroughRegex = regexp.MustCompile("([\\s>_*]|^)~(.+?)~([^a-zA-Z\\d]|$)")
var whatsAppFormat = map[*regexp.Regexp]string{
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codeBlockRegex: "<pre>$1</pre>",
italicRegex: "$1<em>$2</em>$3",
boldRegex: "$1<strong>$2</strong>$3",
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strikethroughRegex: "$1<del>$2</del>$3",
}
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func (portal *Portal) ParseWhatsAppFormat(input string) string {
output := html.EscapeString(input)
for regex, replacement := range whatsAppFormat {
output = regex.ReplaceAllString(output, replacement)
}
return output
}
func (portal *Portal) HandleTextMessage(message whatsapp.TextMessage) {
if portal.IsDuplicate(message.Info.Id) {
return
}
err := portal.CreateMatrixRoom()
if err != nil {
portal.log.Errorln("Failed to create portal room:", err)
return
}
intent := portal.GetMessageIntent(message.Info)
if intent == nil {
return
}
content := gomatrix.Content{
Body: message.Text,
MsgType: gomatrix.MsgText,
}
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htmlBody := portal.ParseWhatsAppFormat(message.Text)
if htmlBody != message.Text {
content.FormattedBody = htmlBody
content.Format = gomatrix.FormatHTML
}
portal.SetReply(&content, message.Info)
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intent.UserTyping(portal.MXID, false, 0)
resp, err := intent.SendMassagedMessageEvent(portal.MXID, gomatrix.EventMessage, content, int64(message.Info.Timestamp*1000))
if err != nil {
portal.log.Errorfln("Failed to handle message %s: %v", message.Info.Id, err)
return
}
portal.MarkHandled(message.Info.Id, resp.EventID)
portal.log.Debugln("Handled message", message.Info.Id, "->", resp.EventID)
}
func (portal *Portal) HandleMediaMessage(download func() ([]byte, error), thumbnail []byte, info whatsapp.MessageInfo, mimeType, caption string) {
if portal.IsDuplicate(info.Id) {
return
}
err := portal.CreateMatrixRoom()
if err != nil {
portal.log.Errorln("Failed to create portal room:", err)
return
}
intent := portal.GetMessageIntent(info)
if intent == nil {
return
}
data, err := download()
if err != nil {
portal.log.Errorln("Failed to download media:", err)
return
}
uploaded, err := intent.UploadBytes(data, mimeType)
if err != nil {
portal.log.Errorln("Failed to upload media:", err)
return
}
if len(caption) == 0 {
caption = info.Id
exts, _ := mime.ExtensionsByType(mimeType)
if exts != nil && len(exts) > 0 {
caption += exts[0]
}
}
content := gomatrix.Content{
Body: caption,
URL: uploaded.ContentURI,
Info: &gomatrix.FileInfo{
Size: len(data),
MimeType: mimeType,
},
}
portal.SetReply(&content, info)
if thumbnail != nil {
thumbnailMime := http.DetectContentType(thumbnail)
uploadedThumbnail, _ := intent.UploadBytes(thumbnail, thumbnailMime)
if uploadedThumbnail != nil {
content.Info.ThumbnailURL = uploadedThumbnail.ContentURI
cfg, _, _ := image.DecodeConfig(bytes.NewReader(data))
content.Info.ThumbnailInfo = &gomatrix.FileInfo{
Size: len(thumbnail),
Width: cfg.Width,
Height: cfg.Height,
MimeType: thumbnailMime,
}
}
}
switch strings.ToLower(strings.Split(mimeType, "/")[0]) {
case "image":
content.MsgType = gomatrix.MsgImage
cfg, _, _ := image.DecodeConfig(bytes.NewReader(data))
content.Info.Width = cfg.Width
content.Info.Height = cfg.Height
case "video":
content.MsgType = gomatrix.MsgVideo
case "audio":
content.MsgType = gomatrix.MsgAudio
default:
content.MsgType = gomatrix.MsgFile
}
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intent.UserTyping(portal.MXID, false, 0)
resp, err := intent.SendMassagedMessageEvent(portal.MXID, gomatrix.EventMessage, content, int64(info.Timestamp*1000))
if err != nil {
portal.log.Errorfln("Failed to handle message %s: %v", info.Id, err)
return
}
portal.MarkHandled(info.Id, resp.EventID)
portal.log.Debugln("Handled message", info.Id, "->", resp.EventID)
}
var htmlParser = format.HTMLParser{
TabsToSpaces: 4,
Newline: "\n",
PillConverter: func(mxid, eventID string) string {
return mxid
},
BoldConverter: func(text string) string {
return fmt.Sprintf("*%s*", text)
},
ItalicConverter: func(text string) string {
return fmt.Sprintf("_%s_", text)
},
StrikethroughConverter: func(text string) string {
return fmt.Sprintf("~%s~", text)
},
MonospaceConverter: func(text string) string {
return fmt.Sprintf("```%s```", text)
},
MonospaceBlockConverter: func(text string) string {
return fmt.Sprintf("```%s```", text)
},
}
func makeMessageID() string {
b := make([]byte, 10)
rand.Read(b)
return strings.ToUpper(hex.EncodeToString(b))
}
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func (portal *Portal) PreprocessMatrixMedia(evt *gomatrix.Event) (string, io.ReadCloser, []byte) {
if evt.Content.Info == nil {
evt.Content.Info = &gomatrix.FileInfo{}
}
caption := evt.Content.Body
exts, err := mime.ExtensionsByType(evt.Content.Info.MimeType)
for _, ext := range exts {
if strings.HasSuffix(caption, ext) {
caption = ""
break
}
}
content, err := portal.MainIntent().Download(evt.Content.URL)
if err != nil {
portal.log.Errorln("Failed to download media in %s: %v", evt.ID, err)
return "", nil, nil
}
thumbnail, err := portal.MainIntent().DownloadBytes(evt.Content.Info.ThumbnailURL)
return caption, content, thumbnail
}
func (portal *Portal) HandleMatrixMessage(evt *gomatrix.Event) {
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info := whatsapp.MessageInfo{
Id: makeMessageID(),
RemoteJid: portal.JID,
}
var err error
switch evt.Content.MsgType {
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case gomatrix.MsgText, gomatrix.MsgEmote:
text := evt.Content.Body
if evt.Content.Format == gomatrix.FormatHTML {
text = htmlParser.Parse(evt.Content.FormattedBody)
}
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if evt.Content.MsgType == gomatrix.MsgEmote {
text = "/me " + text
}
err = portal.user.Conn.Send(whatsapp.TextMessage{
Text: text,
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Info: info,
})
case gomatrix.MsgImage:
caption, content, thumbnail := portal.PreprocessMatrixMedia(evt)
if content == nil {
return
}
err = portal.user.Conn.Send(whatsapp.ImageMessage{
Caption: caption,
Content: content,
Thumbnail: thumbnail,
Type: evt.Content.Info.MimeType,
Info: info,
})
case gomatrix.MsgVideo:
caption, content, thumbnail := portal.PreprocessMatrixMedia(evt)
if content == nil {
return
}
err = portal.user.Conn.Send(whatsapp.VideoMessage{
Caption: caption,
Content: content,
Thumbnail: thumbnail,
Type: evt.Content.Info.MimeType,
Info: info,
})
case gomatrix.MsgAudio:
_, content, _ := portal.PreprocessMatrixMedia(evt)
if content == nil {
return
}
err = portal.user.Conn.Send(whatsapp.AudioMessage{
Content: content,
Type: evt.Content.Info.MimeType,
Info: info,
})
case gomatrix.MsgFile:
_, content, thumbnail := portal.PreprocessMatrixMedia(evt)
if content == nil {
return
}
err = portal.user.Conn.Send(whatsapp.DocumentMessage{
Content: content,
Thumbnail: thumbnail,
Type: evt.Content.Info.MimeType,
Info: info,
})
default:
portal.log.Debugln("Unhandled Matrix event:", evt)
return
}
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portal.MarkHandled(info.Id, evt.ID)
if err != nil {
portal.log.Errorfln("Error handling Matrix event %s: %v", evt.ID, err)
} else {
portal.log.Debugln("Handled Matrix event:", evt)
}
}