mautrix-whatsapp/portal.go

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// mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge.
// Copyright (C) 2019 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/gob"
"encoding/hex"
"fmt"
"image"
"image/gif"
"image/jpeg"
"image/png"
"math/rand"
"mime"
"net/http"
"reflect"
"strings"
"sync"
"time"
"github.com/Rhymen/go-whatsapp"
waProto "github.com/Rhymen/go-whatsapp/binary/proto"
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log "maunium.net/go/maulogger/v2"
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"maunium.net/go/mautrix"
"maunium.net/go/mautrix-appservice"
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"maunium.net/go/mautrix-whatsapp/database"
"maunium.net/go/mautrix-whatsapp/types"
"maunium.net/go/mautrix-whatsapp/whatsapp-ext"
)
func (bridge *Bridge) GetPortalByMXID(mxid types.MatrixRoomID) *Portal {
bridge.portalsLock.Lock()
defer bridge.portalsLock.Unlock()
portal, ok := bridge.portalsByMXID[mxid]
if !ok {
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return bridge.loadDBPortal(bridge.DB.Portal.GetByMXID(mxid), nil)
}
return portal
}
func (bridge *Bridge) GetPortalByJID(key database.PortalKey) *Portal {
bridge.portalsLock.Lock()
defer bridge.portalsLock.Unlock()
portal, ok := bridge.portalsByJID[key]
if !ok {
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return bridge.loadDBPortal(bridge.DB.Portal.GetByJID(key), &key)
}
return portal
}
func (bridge *Bridge) GetAllPortals() []*Portal {
return bridge.dbPortalsToPortals(bridge.DB.Portal.GetAll())
}
func (bridge *Bridge) GetAllPortalsByJID(jid types.WhatsAppID) []*Portal {
return bridge.dbPortalsToPortals(bridge.DB.Portal.GetAllByJID(jid))
}
func (bridge *Bridge) dbPortalsToPortals(dbPortals []*database.Portal) []*Portal {
bridge.portalsLock.Lock()
defer bridge.portalsLock.Unlock()
output := make([]*Portal, len(dbPortals))
for index, dbPortal := range dbPortals {
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if dbPortal == nil {
continue
}
portal, ok := bridge.portalsByJID[dbPortal.Key]
if !ok {
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portal = bridge.loadDBPortal(dbPortal, nil)
}
output[index] = portal
}
return output
}
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func (bridge *Bridge) loadDBPortal(dbPortal *database.Portal, key *database.PortalKey) *Portal {
if dbPortal == nil {
if key == nil {
return nil
}
dbPortal = bridge.DB.Portal.New()
dbPortal.Key = *key
dbPortal.Insert()
}
portal := bridge.NewPortal(dbPortal)
bridge.portalsByJID[portal.Key] = portal
if len(portal.MXID) > 0 {
bridge.portalsByMXID[portal.MXID] = portal
}
return portal
}
func (portal *Portal) GetUsers() []*User {
return nil
}
func (bridge *Bridge) NewPortal(dbPortal *database.Portal) *Portal {
portal := &Portal{
Portal: dbPortal,
bridge: bridge,
log: bridge.Log.Sub(fmt.Sprintf("Portal/%s", dbPortal.Key)),
recentlyHandled: [recentlyHandledLength]types.WhatsAppMessageID{},
messages: make(chan PortalMessage, 128),
}
go portal.handleMessageLoop()
return portal
}
const recentlyHandledLength = 100
type PortalMessage struct {
chat string
source *User
data interface{}
timestamp uint64
}
type Portal struct {
*database.Portal
bridge *Bridge
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log log.Logger
roomCreateLock sync.Mutex
recentlyHandled [recentlyHandledLength]types.WhatsAppMessageID
recentlyHandledLock sync.Mutex
recentlyHandledIndex uint8
backfillLock sync.Mutex
backfilling bool
lastMessageTs uint64
privateChatBackfillInvitePuppet func()
messages chan PortalMessage
isPrivate *bool
}
const MaxMessageAgeToCreatePortal = 5 * 60 // 5 minutes
func (portal *Portal) handleMessageLoop() {
for msg := range portal.messages {
if len(portal.MXID) == 0 {
if msg.timestamp+MaxMessageAgeToCreatePortal < uint64(time.Now().Unix()) {
portal.log.Debugln("Not creating portal room for incoming message as the message is too old.")
continue
}
err := portal.CreateMatrixRoom(msg.source)
if err != nil {
portal.log.Errorln("Failed to create portal room:", err)
return
}
}
portal.backfillLock.Lock()
portal.handleMessage(msg)
portal.backfillLock.Unlock()
}
}
func (portal *Portal) handleMessage(msg PortalMessage) {
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if len(portal.MXID) == 0 {
portal.log.Warnln("handleMessage called even though portal.MXID is empty")
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return
}
switch data := msg.data.(type) {
case whatsapp.TextMessage:
portal.HandleTextMessage(msg.source, data)
case whatsapp.ImageMessage:
portal.HandleMediaMessage(msg.source, data.Download, data.Thumbnail, data.Info, data.Type, data.Caption)
case whatsapp.VideoMessage:
portal.HandleMediaMessage(msg.source, data.Download, data.Thumbnail, data.Info, data.Type, data.Caption)
case whatsapp.AudioMessage:
portal.HandleMediaMessage(msg.source, data.Download, nil, data.Info, data.Type, "")
case whatsapp.DocumentMessage:
portal.HandleMediaMessage(msg.source, data.Download, data.Thumbnail, data.Info, data.Type, data.Title)
case whatsappExt.MessageRevocation:
portal.HandleMessageRevoke(msg.source, data)
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case FakeMessage:
portal.HandleFakeMessage(msg.source, data)
default:
portal.log.Warnln("Unknown message type:", reflect.TypeOf(msg.data))
}
}
func (portal *Portal) isRecentlyHandled(id types.WhatsAppMessageID) bool {
start := portal.recentlyHandledIndex
for i := start; i != start; i = (i - 1) % recentlyHandledLength {
if portal.recentlyHandled[i] == id {
return true
}
}
return false
}
func (portal *Portal) isDuplicate(id types.WhatsAppMessageID) bool {
msg := portal.bridge.DB.Message.GetByJID(portal.Key, id)
if msg != nil {
return true
}
return false
}
func init() {
gob.Register(&waProto.Message{})
}
func (portal *Portal) markHandled(source *User, message *waProto.WebMessageInfo, mxid types.MatrixEventID) {
msg := portal.bridge.DB.Message.New()
msg.Chat = portal.Key
msg.JID = message.GetKey().GetId()
msg.MXID = mxid
msg.Timestamp = message.GetMessageTimestamp()
if message.GetKey().GetFromMe() {
msg.Sender = source.JID
} else if portal.IsPrivateChat() {
msg.Sender = portal.Key.JID
} else {
msg.Sender = message.GetKey().GetParticipant()
if len(msg.Sender) == 0 {
msg.Sender = message.GetParticipant()
}
}
msg.Content = message.Message
msg.Insert()
portal.recentlyHandledLock.Lock()
index := portal.recentlyHandledIndex
portal.recentlyHandledIndex = (portal.recentlyHandledIndex + 1) % recentlyHandledLength
portal.recentlyHandledLock.Unlock()
portal.recentlyHandled[index] = msg.JID
}
func (portal *Portal) startHandling(info whatsapp.MessageInfo) bool {
if portal.lastMessageTs > info.Timestamp+1 ||
portal.isRecentlyHandled(info.Id) ||
portal.isDuplicate(info.Id) {
return false
}
portal.lastMessageTs = info.Timestamp
return true
}
func (portal *Portal) finishHandling(source *User, message *waProto.WebMessageInfo, mxid types.MatrixEventID) {
portal.markHandled(source, message, mxid)
portal.log.Debugln("Handled message", message.GetKey().GetId(), "->", mxid)
}
func (portal *Portal) SyncParticipants(metadata *whatsappExt.GroupInfo) {
changed := false
levels, err := portal.MainIntent().PowerLevels(portal.MXID)
if err != nil {
levels = portal.GetBasePowerLevels()
changed = true
}
for _, participant := range metadata.Participants {
user := portal.bridge.GetUserByJID(participant.JID)
if user != nil && !portal.bridge.AS.StateStore.IsInvited(portal.MXID, user.MXID) {
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_, err = portal.MainIntent().InviteUser(portal.MXID, &mautrix.ReqInviteUser{
UserID: user.MXID,
})
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if err != nil {
portal.log.Warnfln("Failed to invite %s to %s: %v", user.MXID, portal.MXID, err)
}
}
puppet := portal.bridge.GetPuppetByJID(participant.JID)
err := puppet.IntentFor(portal).EnsureJoined(portal.MXID)
if err != nil {
portal.log.Warnfln("Failed to make puppet of %s join %s: %v", participant.JID, portal.MXID, err)
}
expectedLevel := 0
if participant.IsSuperAdmin {
expectedLevel = 95
} else if participant.IsAdmin {
expectedLevel = 50
}
changed = levels.EnsureUserLevel(puppet.MXID, expectedLevel) || changed
if user != nil {
changed = levels.EnsureUserLevel(user.MXID, expectedLevel) || changed
}
}
if changed {
_, err = portal.MainIntent().SetPowerLevels(portal.MXID, levels)
if err != nil {
portal.log.Errorln("Failed to change power levels:", err)
}
}
}
func (portal *Portal) UpdateAvatar(user *User, avatar *whatsappExt.ProfilePicInfo) bool {
if avatar == nil {
var err error
avatar, err = user.Conn.GetProfilePicThumb(portal.Key.JID)
if err != nil {
portal.log.Errorln(err)
return false
}
}
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if avatar.Status != 0 {
return false
}
if portal.Avatar == avatar.Tag {
return false
}
data, err := avatar.DownloadBytes()
if err != nil {
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portal.log.Warnln("Failed to download avatar:", err)
return false
}
mimeType := http.DetectContentType(data)
resp, err := portal.MainIntent().UploadBytes(data, mimeType)
if err != nil {
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portal.log.Warnln("Failed to upload avatar:", err)
return false
}
portal.AvatarURL = resp.ContentURI
if len(portal.MXID) > 0 {
_, 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(name string, setBy types.WhatsAppID) bool {
if portal.Name != name {
intent := portal.MainIntent()
if len(setBy) > 0 {
intent = portal.bridge.GetPuppetByJID(setBy).IntentFor(portal)
}
_, err := intent.SetRoomName(portal.MXID, name)
if err == nil {
portal.Name = name
return true
}
portal.log.Warnln("Failed to set room name:", err)
}
return false
}
func (portal *Portal) UpdateTopic(topic string, setBy types.WhatsAppID) bool {
if portal.Topic != topic {
intent := portal.MainIntent()
if len(setBy) > 0 {
intent = portal.bridge.GetPuppetByJID(setBy).IntentFor(portal)
}
_, err := intent.SetRoomTopic(portal.MXID, topic)
if err == nil {
portal.Topic = topic
return true
}
portal.log.Warnln("Failed to set room topic:", err)
}
return false
}
func (portal *Portal) UpdateMetadata(user *User) bool {
if portal.IsPrivateChat() {
return false
} else if portal.IsStatusBroadcastRoom() {
update := false
update = portal.UpdateName("WhatsApp Status Broadcast", "") || update
update = portal.UpdateTopic("WhatsApp status updates from your contacts", "") || update
return update
}
metadata, err := user.Conn.GetGroupMetaData(portal.Key.JID)
if err != nil {
portal.log.Errorln(err)
return false
}
if metadata.Status != 0 {
// 401: access denied
// 404: group does (no longer) exist
// 500: ??? happens with status@broadcast
// TODO: update the room, e.g. change priority level
// to send messages to moderator
return false
}
portal.SyncParticipants(metadata)
update := false
update = portal.UpdateName(metadata.Name, metadata.NameSetBy) || update
update = portal.UpdateTopic(metadata.Topic, metadata.TopicSetBy) || update
return update
}
func (portal *Portal) ensureUserInvited(user *User) {
err := portal.MainIntent().EnsureInvited(portal.MXID, user.MXID)
if err != nil {
portal.log.Warnfln("Failed to ensure %s is invited to %s: %v", user.MXID, portal.MXID, err)
}
customPuppet := portal.bridge.GetPuppetByCustomMXID(user.MXID)
if customPuppet != nil && customPuppet.CustomIntent() != nil {
_ = customPuppet.CustomIntent().EnsureJoined(portal.MXID)
}
}
func (portal *Portal) Sync(user *User, contact whatsapp.Contact) {
portal.log.Infoln("Syncing portal for", user.MXID)
if len(portal.MXID) == 0 {
if !portal.IsPrivateChat() {
portal.Name = contact.Name
}
err := portal.CreateMatrixRoom(user)
if err != nil {
portal.log.Errorln("Failed to create portal room:", err)
return
}
} else {
portal.ensureUserInvited(user)
}
if portal.IsPrivateChat() {
return
}
update := false
update = portal.UpdateMetadata(user) || update
if !portal.IsStatusBroadcastRoom() {
update = portal.UpdateAvatar(user, nil) || update
}
if update {
portal.Update()
}
}
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func (portal *Portal) GetBasePowerLevels() *mautrix.PowerLevels {
anyone := 0
nope := 99
invite := 99
if portal.bridge.Config.Bridge.AllowUserInvite {
invite = 0
}
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return &mautrix.PowerLevels{
UsersDefault: anyone,
EventsDefault: anyone,
RedactPtr: &anyone,
StateDefaultPtr: &nope,
BanPtr: &nope,
InvitePtr: &invite,
Users: map[string]int{
portal.MainIntent().UserID: 100,
},
Events: map[string]int{
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mautrix.StateRoomName.Type: anyone,
mautrix.StateRoomAvatar.Type: anyone,
mautrix.StateTopic.Type: anyone,
},
}
}
func (portal *Portal) ChangeAdminStatus(jids []string, setAdmin bool) {
levels, err := portal.MainIntent().PowerLevels(portal.MXID)
if err != nil {
levels = portal.GetBasePowerLevels()
}
newLevel := 0
if setAdmin {
newLevel = 50
}
changed := false
for _, jid := range jids {
puppet := portal.bridge.GetPuppetByJID(jid)
changed = levels.EnsureUserLevel(puppet.MXID, newLevel) || changed
user := portal.bridge.GetUserByJID(jid)
if user != nil {
changed = levels.EnsureUserLevel(user.MXID, newLevel) || changed
}
}
if changed {
_, err = portal.MainIntent().SetPowerLevels(portal.MXID, levels)
if err != nil {
portal.log.Errorln("Failed to change power levels:", err)
}
}
}
func (portal *Portal) RestrictMessageSending(restrict bool) {
levels, err := portal.MainIntent().PowerLevels(portal.MXID)
if err != nil {
levels = portal.GetBasePowerLevels()
}
if restrict {
levels.EventsDefault = 50
} else {
levels.EventsDefault = 0
}
_, err = portal.MainIntent().SetPowerLevels(portal.MXID, levels)
if err != nil {
portal.log.Errorln("Failed to change power levels:", err)
}
}
func (portal *Portal) RestrictMetadataChanges(restrict bool) {
levels, err := portal.MainIntent().PowerLevels(portal.MXID)
if err != nil {
levels = portal.GetBasePowerLevels()
}
newLevel := 0
if restrict {
newLevel = 50
}
changed := false
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changed = levels.EnsureEventLevel(mautrix.StateRoomName, newLevel) || changed
changed = levels.EnsureEventLevel(mautrix.StateRoomAvatar, newLevel) || changed
changed = levels.EnsureEventLevel(mautrix.StateTopic, newLevel) || changed
if changed {
_, err = portal.MainIntent().SetPowerLevels(portal.MXID, levels)
if err != nil {
portal.log.Errorln("Failed to change power levels:", err)
}
}
}
func (portal *Portal) BackfillHistory(user *User, lastMessageTime uint64) error {
if !portal.bridge.Config.Bridge.RecoverHistory {
return nil
}
endBackfill := portal.beginBackfill()
defer endBackfill()
lastMessage := portal.bridge.DB.Message.GetLastInChat(portal.Key)
if lastMessage == nil {
return nil
}
if lastMessage.Timestamp >= lastMessageTime {
portal.log.Debugln("Not backfilling: no new messages")
return nil
}
lastMessageID := lastMessage.JID
lastMessageFromMe := lastMessage.Sender == user.JID
portal.log.Infoln("Backfilling history since", lastMessageID, "for", user.MXID)
for len(lastMessageID) > 0 {
portal.log.Debugln("Backfilling history: 50 messages after", lastMessageID)
resp, err := user.Conn.LoadMessagesAfter(portal.Key.JID, lastMessageID, lastMessageFromMe, 50)
if err != nil {
return err
}
messages, ok := resp.Content.([]interface{})
if !ok || len(messages) == 0 {
break
}
portal.handleHistory(user, messages)
lastMessageProto, ok := messages[len(messages)-1].(*waProto.WebMessageInfo)
if ok {
lastMessageID = lastMessageProto.GetKey().GetId()
lastMessageFromMe = lastMessageProto.GetKey().GetFromMe()
}
}
portal.log.Infoln("Backfilling finished")
return nil
}
func (portal *Portal) beginBackfill() func() {
portal.backfillLock.Lock()
portal.backfilling = true
var privateChatPuppetInvited bool
var privateChatPuppet *Puppet
if portal.IsPrivateChat() && portal.bridge.Config.Bridge.InviteOwnPuppetForBackfilling {
privateChatPuppet = portal.bridge.GetPuppetByJID(portal.Key.Receiver)
portal.privateChatBackfillInvitePuppet = func() {
if privateChatPuppetInvited {
return
}
privateChatPuppetInvited = true
_, _ = portal.MainIntent().InviteUser(portal.MXID, &mautrix.ReqInviteUser{UserID: privateChatPuppet.MXID})
_ = privateChatPuppet.DefaultIntent().EnsureJoined(portal.MXID)
}
}
return func() {
portal.backfilling = false
portal.privateChatBackfillInvitePuppet = nil
portal.backfillLock.Unlock()
if privateChatPuppet != nil && privateChatPuppetInvited {
_, _ = privateChatPuppet.DefaultIntent().LeaveRoom(portal.MXID)
}
}
}
func (portal *Portal) FillInitialHistory(user *User) error {
if portal.bridge.Config.Bridge.InitialHistoryFill == 0 {
return nil
}
endBackfill := portal.beginBackfill()
defer endBackfill()
if portal.privateChatBackfillInvitePuppet != nil {
portal.privateChatBackfillInvitePuppet()
}
n := portal.bridge.Config.Bridge.InitialHistoryFill
portal.log.Infoln("Filling initial history, maximum", n, "messages")
var messages []interface{}
before := ""
fromMe := true
chunkNum := 1
for n > 0 {
count := 50
if n < count {
count = n
}
portal.log.Debugfln("Fetching chunk %d (%d messages / %d cap) before message %s", chunkNum, count, n, before)
resp, err := user.Conn.LoadMessagesBefore(portal.Key.JID, before, fromMe, count)
if err != nil {
return err
}
chunk, ok := resp.Content.([]interface{})
if !ok || len(chunk) == 0 {
portal.log.Infoln("Chunk empty, starting handling of loaded messages")
break
}
messages = append(chunk, messages...)
portal.log.Debugfln("Fetched chunk and received %d messages", len(chunk))
n -= len(chunk)
key := chunk[0].(*waProto.WebMessageInfo).GetKey()
before = key.GetId()
fromMe = key.GetFromMe()
if len(before) == 0 {
portal.log.Infoln("No message ID for first message, starting handling of loaded messages")
break
}
}
portal.handleHistory(user, messages)
portal.log.Infoln("Initial history fill complete")
return nil
}
func (portal *Portal) handleHistory(user *User, messages []interface{}) {
portal.log.Infoln("Handling", len(messages), "messages of history")
for _, rawMessage := range messages {
message, ok := rawMessage.(*waProto.WebMessageInfo)
if !ok {
portal.log.Warnln("Unexpected non-WebMessageInfo item in history response:", rawMessage)
continue
}
data := whatsapp.ParseProtoMessage(message)
if portal.privateChatBackfillInvitePuppet != nil && message.GetKey().GetFromMe() && portal.IsPrivateChat() {
portal.privateChatBackfillInvitePuppet()
}
portal.handleMessage(PortalMessage{portal.Key.JID, user, data, message.GetMessageTimestamp()})
}
}
func (portal *Portal) CreateMatrixRoom(user *User) error {
portal.roomCreateLock.Lock()
defer portal.roomCreateLock.Unlock()
if len(portal.MXID) > 0 {
return nil
}
intent := portal.MainIntent()
if err := intent.EnsureRegistered(); err != nil {
return err
}
portal.log.Infoln("Creating Matrix room. Info source:", user.MXID)
var metadata *whatsappExt.GroupInfo
isPrivateChat := false
if portal.IsPrivateChat() {
puppet := portal.bridge.GetPuppetByJID(portal.Key.JID)
if portal.bridge.Config.Bridge.PrivateChatPortalMeta {
portal.Name = puppet.Displayname
portal.AvatarURL = puppet.AvatarURL
portal.Avatar = puppet.Avatar
} else {
portal.Name = ""
}
portal.Topic = "WhatsApp private chat"
isPrivateChat = true
} else if portal.IsStatusBroadcastRoom() {
portal.Name = "WhatsApp Status Broadcast"
portal.Topic = "WhatsApp status updates from your contacts"
} else {
var err error
metadata, err = user.Conn.GetGroupMetaData(portal.Key.JID)
if err == nil && metadata.Status == 0 {
portal.Name = metadata.Name
portal.Topic = metadata.Topic
}
portal.UpdateAvatar(user, nil)
}
initialState := []*mautrix.Event{{
Type: mautrix.StatePowerLevels,
Content: mautrix.Content{
PowerLevels: portal.GetBasePowerLevels(),
},
}}
if len(portal.AvatarURL) > 0 {
initialState = append(initialState, &mautrix.Event{
Type: mautrix.StateRoomAvatar,
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Content: mautrix.Content{
URL: portal.AvatarURL,
},
})
}
resp, err := intent.CreateRoom(&mautrix.ReqCreateRoom{
Visibility: "private",
Name: portal.Name,
Topic: portal.Topic,
Invite: []string{user.MXID},
Preset: "private_chat",
IsDirect: isPrivateChat,
InitialState: initialState,
})
if err != nil {
return err
}
portal.MXID = resp.RoomID
portal.Update()
if metadata != nil {
portal.SyncParticipants(metadata)
} else {
customPuppet := portal.bridge.GetPuppetByCustomMXID(user.MXID)
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if customPuppet != nil && customPuppet.CustomIntent() != nil {
_ = customPuppet.CustomIntent().EnsureJoined(portal.MXID)
}
}
user.addPortalToCommunity(portal)
err = portal.FillInitialHistory(user)
if err != nil {
portal.log.Errorln("Failed to fill history:", err)
}
return nil
}
func (portal *Portal) IsPrivateChat() bool {
if portal.isPrivate == nil {
val := strings.HasSuffix(portal.Key.JID, whatsappExt.NewUserSuffix)
portal.isPrivate = &val
}
return *portal.isPrivate
}
func (portal *Portal) IsStatusBroadcastRoom() bool {
return portal.Key.JID == "status@broadcast"
}
func (portal *Portal) MainIntent() *appservice.IntentAPI {
if portal.IsPrivateChat() {
return portal.bridge.GetPuppetByJID(portal.Key.JID).DefaultIntent()
}
return portal.bridge.Bot
}
func (portal *Portal) GetMessageIntent(user *User, info whatsapp.MessageInfo) *appservice.IntentAPI {
if info.FromMe {
return portal.bridge.GetPuppetByJID(user.JID).IntentFor(portal)
} else if portal.IsPrivateChat() {
return portal.MainIntent()
} else if len(info.SenderJid) == 0 {
if len(info.Source.GetParticipant()) != 0 {
info.SenderJid = info.Source.GetParticipant()
} else {
return nil
}
}
return portal.bridge.GetPuppetByJID(info.SenderJid).IntentFor(portal)
}
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func (portal *Portal) SetReply(content *mautrix.Content, info whatsapp.MessageInfo) {
if len(info.QuotedMessageID) == 0 {
return
}
message := portal.bridge.DB.Message.GetByJID(portal.Key, 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
}
event.Content.RemoveReplyFallback()
content.SetReply(event)
}
return
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}
func (portal *Portal) HandleMessageRevoke(user *User, message whatsappExt.MessageRevocation) {
msg := portal.bridge.DB.Message.GetByJID(portal.Key, message.Id)
if msg == nil {
return
}
var intent *appservice.IntentAPI
if message.FromMe {
if portal.IsPrivateChat() {
intent = portal.bridge.GetPuppetByJID(user.JID).CustomIntent()
} else {
intent = portal.bridge.GetPuppetByJID(user.JID).IntentFor(portal)
}
} else if len(message.Participant) > 0 {
intent = portal.bridge.GetPuppetByJID(message.Participant).IntentFor(portal)
}
if intent == nil {
intent = portal.MainIntent()
}
_, err := intent.RedactEvent(portal.MXID, msg.MXID)
if err != nil {
portal.log.Errorln("Failed to redact %s: %v", msg.JID, err)
return
}
msg.Delete()
}
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func (portal *Portal) HandleFakeMessage(source *User, message FakeMessage) {
if portal.isRecentlyHandled(message.ID) {
return
}
_, err := portal.MainIntent().SendNotice(portal.MXID, message.Text)
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if err != nil {
portal.log.Errorfln("Failed to handle fake message %s: %v", message.ID, err)
return
}
portal.recentlyHandledLock.Lock()
index := portal.recentlyHandledIndex
portal.recentlyHandledIndex = (portal.recentlyHandledIndex + 1) % recentlyHandledLength
portal.recentlyHandledLock.Unlock()
portal.recentlyHandled[index] = message.ID
}
type MessageContent struct {
*mautrix.Content
IsCustomPuppet bool `json:"net.maunium.whatsapp.puppet,omitempty"`
}
func (portal *Portal) HandleTextMessage(source *User, message whatsapp.TextMessage) {
if !portal.startHandling(message.Info) {
return
}
intent := portal.GetMessageIntent(source, message.Info)
if intent == nil {
return
}
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content := &mautrix.Content{
Body: message.Text,
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MsgType: mautrix.MsgText,
}
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portal.bridge.Formatter.ParseWhatsApp(content)
portal.SetReply(content, message.Info)
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_, _ = intent.UserTyping(portal.MXID, false, 0)
resp, err := intent.SendMassagedMessageEvent(portal.MXID, mautrix.EventMessage, &MessageContent{content, intent.IsCustomPuppet}, int64(message.Info.Timestamp*1000))
if err != nil {
portal.log.Errorfln("Failed to handle message %s: %v", message.Info.Id, err)
return
}
portal.finishHandling(source, message.Info.Source, resp.EventID)
}
func (portal *Portal) HandleMediaMessage(source *User, download func() ([]byte, error), thumbnail []byte, info whatsapp.MessageInfo, mimeType, caption string) {
if !portal.startHandling(info) {
return
}
intent := portal.GetMessageIntent(source, info)
if intent == nil {
return
}
data, err := download()
if err != nil {
portal.log.Errorfln("Failed to download media for %s: %v", info.Id, err)
return
}
uploaded, err := intent.UploadBytes(data, mimeType)
if err != nil {
portal.log.Errorfln("Failed to upload media for %s: %v", err)
return
}
fileName := info.Id
exts, _ := mime.ExtensionsByType(mimeType)
if exts != nil && len(exts) > 0 {
fileName += exts[0]
}
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content := &mautrix.Content{
Body: fileName,
URL: uploaded.ContentURI,
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Info: &mautrix.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))
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content.Info.ThumbnailInfo = &mautrix.FileInfo{
Size: len(thumbnail),
Width: cfg.Width,
Height: cfg.Height,
MimeType: thumbnailMime,
}
}
}
switch strings.ToLower(strings.Split(mimeType, "/")[0]) {
case "image":
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content.MsgType = mautrix.MsgImage
cfg, _, _ := image.DecodeConfig(bytes.NewReader(data))
content.Info.Width = cfg.Width
content.Info.Height = cfg.Height
case "video":
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content.MsgType = mautrix.MsgVideo
case "audio":
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content.MsgType = mautrix.MsgAudio
default:
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content.MsgType = mautrix.MsgFile
}
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_, _ = intent.UserTyping(portal.MXID, false, 0)
ts := int64(info.Timestamp * 1000)
resp, err := intent.SendMassagedMessageEvent(portal.MXID, mautrix.EventMessage, &MessageContent{content, intent.IsCustomPuppet}, ts)
if err != nil {
portal.log.Errorfln("Failed to handle message %s: %v", info.Id, err)
return
}
if len(caption) > 0 {
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captionContent := &mautrix.Content{
Body: caption,
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MsgType: mautrix.MsgNotice,
}
portal.bridge.Formatter.ParseWhatsApp(captionContent)
_, err := intent.SendMassagedMessageEvent(portal.MXID, mautrix.EventMessage, &MessageContent{captionContent, intent.IsCustomPuppet}, ts)
if err != nil {
portal.log.Warnfln("Failed to handle caption of message %s: %v", info.Id, err)
}
// TODO store caption mxid?
}
portal.finishHandling(source, info.Source, resp.EventID)
}
func makeMessageID() *string {
b := make([]byte, 10)
rand.Read(b)
str := strings.ToUpper(hex.EncodeToString(b))
return &str
}
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func (portal *Portal) downloadThumbnail(evt *mautrix.Event) []byte {
if evt.Content.Info == nil || len(evt.Content.Info.ThumbnailURL) == 0 {
return nil
}
thumbnail, err := portal.MainIntent().DownloadBytes(evt.Content.Info.ThumbnailURL)
if err != nil {
portal.log.Errorln("Failed to download thumbnail in %s: %v", evt.ID, err)
return nil
}
thumbnailType := http.DetectContentType(thumbnail)
var img image.Image
switch thumbnailType {
case "image/png":
img, err = png.Decode(bytes.NewReader(thumbnail))
case "image/gif":
img, err = gif.Decode(bytes.NewReader(thumbnail))
case "image/jpeg":
return thumbnail
default:
return nil
}
var buf bytes.Buffer
err = jpeg.Encode(&buf, img, &jpeg.Options{
Quality: jpeg.DefaultQuality,
})
if err != nil {
portal.log.Errorln("Failed to re-encode thumbnail in %s: %v", evt.ID, err)
return nil
}
return buf.Bytes()
}
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func (portal *Portal) preprocessMatrixMedia(sender *User, evt *mautrix.Event, mediaType whatsapp.MediaType) *MediaUpload {
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if evt.Content.Info == nil {
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evt.Content.Info = &mautrix.FileInfo{}
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}
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().DownloadBytes(evt.Content.URL)
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if err != nil {
portal.log.Errorfln("Failed to download media in %s: %v", evt.ID, err)
return nil
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}
url, mediaKey, fileEncSHA256, fileSHA256, fileLength, err := sender.Conn.Upload(bytes.NewReader(content), mediaType)
if err != nil {
portal.log.Errorfln("Failed to upload media in %s: %v", evt.ID, err)
return nil
}
return &MediaUpload{
Caption: caption,
URL: url,
MediaKey: mediaKey,
FileEncSHA256: fileEncSHA256,
FileSHA256: fileSHA256,
FileLength: fileLength,
Thumbnail: portal.downloadThumbnail(evt),
}
}
type MediaUpload struct {
Caption string
URL string
MediaKey []byte
FileEncSHA256 []byte
FileSHA256 []byte
FileLength uint64
Thumbnail []byte
}
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func (portal *Portal) HandleMatrixMessage(sender *User, evt *mautrix.Event) {
if portal.IsPrivateChat() && sender.JID != portal.Key.Receiver {
return
}
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portal.log.Debugfln("Received event %s", evt.ID)
ts := uint64(evt.Timestamp / 1000)
status := waProto.WebMessageInfo_ERROR
fromMe := true
info := &waProto.WebMessageInfo{
Key: &waProto.MessageKey{
FromMe: &fromMe,
Id: makeMessageID(),
RemoteJid: &portal.Key.JID,
},
MessageTimestamp: &ts,
Message: &waProto.Message{},
Status: &status,
}
ctxInfo := &waProto.ContextInfo{}
replyToID := evt.Content.GetReplyTo()
if len(replyToID) > 0 {
evt.Content.RemoveReplyFallback()
msg := portal.bridge.DB.Message.GetByMXID(replyToID)
if msg != nil && msg.Content != nil {
ctxInfo.StanzaId = &msg.JID
ctxInfo.Participant = &msg.Sender
ctxInfo.QuotedMessage = msg.Content
}
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}
var err error
switch evt.Content.MsgType {
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case mautrix.MsgText, mautrix.MsgEmote:
text := evt.Content.Body
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if evt.Content.Format == mautrix.FormatHTML {
text = portal.bridge.Formatter.ParseMatrix(evt.Content.FormattedBody)
}
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if evt.Content.MsgType == mautrix.MsgEmote {
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text = "/me " + text
}
ctxInfo.MentionedJid = mentionRegex.FindAllString(text, -1)
for index, mention := range ctxInfo.MentionedJid {
ctxInfo.MentionedJid[index] = mention[1:] + whatsappExt.NewUserSuffix
}
if ctxInfo.StanzaId != nil || ctxInfo.MentionedJid != nil {
info.Message.ExtendedTextMessage = &waProto.ExtendedTextMessage{
Text: &text,
ContextInfo: ctxInfo,
}
} else {
info.Message.Conversation = &text
}
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case mautrix.MsgImage:
media := portal.preprocessMatrixMedia(sender, evt, whatsapp.MediaImage)
if media == nil {
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return
}
info.Message.ImageMessage = &waProto.ImageMessage{
Caption: &media.Caption,
JpegThumbnail: media.Thumbnail,
Url: &media.URL,
MediaKey: media.MediaKey,
Mimetype: &evt.Content.GetInfo().MimeType,
FileEncSha256: media.FileEncSHA256,
FileSha256: media.FileSHA256,
FileLength: &media.FileLength,
}
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case mautrix.MsgVideo:
media := portal.preprocessMatrixMedia(sender, evt, whatsapp.MediaVideo)
if media == nil {
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return
}
duration := uint32(evt.Content.GetInfo().Duration)
info.Message.VideoMessage = &waProto.VideoMessage{
Caption: &media.Caption,
JpegThumbnail: media.Thumbnail,
Url: &media.URL,
MediaKey: media.MediaKey,
Mimetype: &evt.Content.GetInfo().MimeType,
Seconds: &duration,
FileEncSha256: media.FileEncSHA256,
FileSha256: media.FileSHA256,
FileLength: &media.FileLength,
}
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case mautrix.MsgAudio:
media := portal.preprocessMatrixMedia(sender, evt, whatsapp.MediaAudio)
if media == nil {
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return
}
duration := uint32(evt.Content.GetInfo().Duration)
info.Message.AudioMessage = &waProto.AudioMessage{
Url: &media.URL,
MediaKey: media.MediaKey,
Mimetype: &evt.Content.GetInfo().MimeType,
Seconds: &duration,
FileEncSha256: media.FileEncSHA256,
FileSha256: media.FileSHA256,
FileLength: &media.FileLength,
}
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case mautrix.MsgFile:
media := portal.preprocessMatrixMedia(sender, evt, whatsapp.MediaDocument)
if media == nil {
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return
}
info.Message.DocumentMessage = &waProto.DocumentMessage{
Url: &media.URL,
MediaKey: media.MediaKey,
Mimetype: &evt.Content.GetInfo().MimeType,
FileEncSha256: media.FileEncSHA256,
FileSha256: media.FileSHA256,
FileLength: &media.FileLength,
}
default:
portal.log.Debugln("Unhandled Matrix event:", evt)
return
}
portal.markHandled(sender, info, evt.ID)
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portal.log.Debugln("Sending event", evt.ID, "to WhatsApp")
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_, err = sender.Conn.Send(info)
if err != nil {
portal.log.Errorfln("Error handling Matrix event %s: %v", evt.ID, err)
} else {
portal.log.Debugln("Handled Matrix event:", evt)
}
}
func (portal *Portal) HandleMatrixRedaction(sender *User, evt *mautrix.Event) {
if portal.IsPrivateChat() && sender.JID != portal.Key.Receiver {
return
}
msg := portal.bridge.DB.Message.GetByMXID(evt.Redacts)
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if msg == nil || msg.Sender != sender.JID {
return
}
ts := uint64(evt.Timestamp / 1000)
status := waProto.WebMessageInfo_PENDING
protoMsgType := waProto.ProtocolMessage_REVOKE
fromMe := true
info := &waProto.WebMessageInfo{
Key: &waProto.MessageKey{
FromMe: &fromMe,
Id: makeMessageID(),
RemoteJid: &portal.Key.JID,
},
MessageTimestamp: &ts,
Message: &waProto.Message{
ProtocolMessage: &waProto.ProtocolMessage{
Type: &protoMsgType,
Key: &waProto.MessageKey{
FromMe: &fromMe,
Id: &msg.JID,
RemoteJid: &portal.Key.JID,
},
},
},
Status: &status,
}
_, err := sender.Conn.Send(info)
if err != nil {
portal.log.Errorfln("Error handling Matrix redaction: %s: %v", evt.ID, err)
} else {
portal.log.Debugln("Handled Matrix redaction:", evt)
}
}
func (portal *Portal) Delete() {
portal.Portal.Delete()
delete(portal.bridge.portalsByJID, portal.Key)
if len(portal.MXID) > 0 {
delete(portal.bridge.portalsByMXID, portal.MXID)
}
}
func (portal *Portal) Cleanup(puppetsOnly bool) {
if len(portal.MXID) == 0 {
return
}
if portal.IsPrivateChat() {
_, err := portal.MainIntent().LeaveRoom(portal.MXID)
if err != nil {
portal.log.Warnln("Failed to leave private chat portal with main intent:", err)
}
return
}
intent := portal.MainIntent()
members, err := intent.JoinedMembers(portal.MXID)
if err != nil {
portal.log.Errorln("Failed to get portal members for cleanup:", err)
return
}
for member, _ := range members.Joined {
if member == intent.UserID {
continue
}
puppet := portal.bridge.GetPuppetByMXID(member)
if puppet != nil {
_, err = puppet.DefaultIntent().LeaveRoom(portal.MXID)
if err != nil {
portal.log.Errorln("Error leaving as puppet while cleaning up portal:", err)
}
} else if !puppetsOnly {
_, err = intent.KickUser(portal.MXID, &mautrix.ReqKickUser{UserID: member, Reason: "Deleting portal"})
if err != nil {
portal.log.Errorln("Error kicking user while cleaning up portal:", err)
}
}
}
_, err = intent.LeaveRoom(portal.MXID)
if err != nil {
portal.log.Errorln("Error leaving with main intent while cleaning up portal:", err)
}
}
func (portal *Portal) HandleMatrixLeave(sender *User) {
if portal.IsPrivateChat() {
portal.log.Debugln("User left private chat portal, cleaning up and deleting...")
portal.Delete()
portal.Cleanup(false)
return
}
}
func (portal *Portal) HandleMatrixKick(sender *User, event *mautrix.Event) {
// TODO
}