mirror of
https://github.com/tulir/mautrix-whatsapp
synced 2024-12-15 01:43:49 +01:00
454 lines
16 KiB
Go
454 lines
16 KiB
Go
// mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge.
|
|
// Copyright (C) 2020 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 (
|
|
"errors"
|
|
"fmt"
|
|
"strings"
|
|
"time"
|
|
|
|
"maunium.net/go/maulogger/v2"
|
|
|
|
"maunium.net/go/mautrix"
|
|
"maunium.net/go/mautrix/appservice"
|
|
"maunium.net/go/mautrix/event"
|
|
"maunium.net/go/mautrix/format"
|
|
"maunium.net/go/mautrix/id"
|
|
|
|
"maunium.net/go/mautrix-whatsapp/database"
|
|
)
|
|
|
|
type MatrixHandler struct {
|
|
bridge *Bridge
|
|
as *appservice.AppService
|
|
log maulogger.Logger
|
|
cmd *CommandHandler
|
|
}
|
|
|
|
func NewMatrixHandler(bridge *Bridge) *MatrixHandler {
|
|
handler := &MatrixHandler{
|
|
bridge: bridge,
|
|
as: bridge.AS,
|
|
log: bridge.Log.Sub("Matrix"),
|
|
cmd: NewCommandHandler(bridge),
|
|
}
|
|
bridge.EventProcessor.On(event.EventMessage, handler.HandleMessage)
|
|
bridge.EventProcessor.On(event.EventEncrypted, handler.HandleEncrypted)
|
|
bridge.EventProcessor.On(event.EventSticker, handler.HandleMessage)
|
|
bridge.EventProcessor.On(event.EventRedaction, handler.HandleRedaction)
|
|
bridge.EventProcessor.On(event.StateMember, handler.HandleMembership)
|
|
bridge.EventProcessor.On(event.StateRoomName, handler.HandleRoomMetadata)
|
|
bridge.EventProcessor.On(event.StateRoomAvatar, handler.HandleRoomMetadata)
|
|
bridge.EventProcessor.On(event.StateTopic, handler.HandleRoomMetadata)
|
|
bridge.EventProcessor.On(event.StateEncryption, handler.HandleEncryption)
|
|
return handler
|
|
}
|
|
|
|
func (mx *MatrixHandler) HandleEncryption(evt *event.Event) {
|
|
defer mx.bridge.Metrics.TrackMatrixEvent(evt.Type)()
|
|
if evt.Content.AsEncryption().Algorithm != id.AlgorithmMegolmV1 {
|
|
return
|
|
}
|
|
portal := mx.bridge.GetPortalByMXID(evt.RoomID)
|
|
if portal != nil && !portal.Encrypted {
|
|
mx.log.Debugfln("%s enabled encryption in %s", evt.Sender, evt.RoomID)
|
|
portal.Encrypted = true
|
|
portal.Update()
|
|
}
|
|
}
|
|
|
|
func (mx *MatrixHandler) joinAndCheckMembers(evt *event.Event, intent *appservice.IntentAPI) *mautrix.RespJoinedMembers {
|
|
resp, err := intent.JoinRoomByID(evt.RoomID)
|
|
if err != nil {
|
|
mx.log.Debugfln("Failed to join room %s as %s with invite from %s: %v", evt.RoomID, intent.UserID, evt.Sender, err)
|
|
return nil
|
|
}
|
|
|
|
members, err := intent.JoinedMembers(resp.RoomID)
|
|
if err != nil {
|
|
mx.log.Debugfln("Failed to get members in room %s after accepting invite from %s as %s: %v", resp.RoomID, evt.Sender, intent.UserID, err)
|
|
_, _ = intent.LeaveRoom(resp.RoomID)
|
|
return nil
|
|
}
|
|
|
|
if len(members.Joined) < 2 {
|
|
mx.log.Debugln("Leaving empty room", resp.RoomID, "after accepting invite from", evt.Sender, "as", intent.UserID)
|
|
_, _ = intent.LeaveRoom(resp.RoomID)
|
|
return nil
|
|
}
|
|
return members
|
|
}
|
|
|
|
func (mx *MatrixHandler) sendNoticeWithMarkdown(roomID id.RoomID, message string) (*mautrix.RespSendEvent, error) {
|
|
intent := mx.as.BotIntent()
|
|
content := format.RenderMarkdown(message, true, false)
|
|
content.MsgType = event.MsgNotice
|
|
return intent.SendMessageEvent(roomID, event.EventMessage, content)
|
|
}
|
|
|
|
func (mx *MatrixHandler) HandleBotInvite(evt *event.Event) {
|
|
intent := mx.as.BotIntent()
|
|
|
|
user := mx.bridge.GetUserByMXID(evt.Sender)
|
|
if user == nil {
|
|
return
|
|
}
|
|
|
|
members := mx.joinAndCheckMembers(evt, intent)
|
|
if members == nil {
|
|
return
|
|
}
|
|
|
|
if !user.Whitelisted {
|
|
_, _ = intent.SendNotice(evt.RoomID, "You are not whitelisted to use this bridge.\n"+
|
|
"If you're the owner of this bridge, see the bridge.permissions section in your config file.")
|
|
_, _ = intent.LeaveRoom(evt.RoomID)
|
|
return
|
|
}
|
|
|
|
_, _ = mx.sendNoticeWithMarkdown(evt.RoomID, mx.bridge.Config.Bridge.ManagementRoomText.Welcome)
|
|
|
|
if len(members.Joined) == 2 && (len(user.ManagementRoom) == 0 || evt.Content.AsMember().IsDirect) {
|
|
user.SetManagementRoom(evt.RoomID)
|
|
_, _ = intent.SendNotice(user.ManagementRoom, "This room has been registered as your bridge management/status room.")
|
|
mx.log.Debugln(evt.RoomID, "registered as a management room with", evt.Sender)
|
|
}
|
|
|
|
if evt.RoomID == user.ManagementRoom {
|
|
if user.HasSession() {
|
|
_, _ = mx.sendNoticeWithMarkdown(evt.RoomID, mx.bridge.Config.Bridge.ManagementRoomText.WelcomeConnected)
|
|
} else {
|
|
_, _ = mx.sendNoticeWithMarkdown(evt.RoomID, mx.bridge.Config.Bridge.ManagementRoomText.WelcomeUnconnected)
|
|
}
|
|
|
|
additionalHelp := mx.bridge.Config.Bridge.ManagementRoomText.AdditionalHelp
|
|
if len(additionalHelp) > 0 {
|
|
_, _ = mx.sendNoticeWithMarkdown(evt.RoomID, additionalHelp)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (mx *MatrixHandler) handlePrivatePortal(roomID id.RoomID, inviter *User, puppet *Puppet, key database.PortalKey) {
|
|
portal := mx.bridge.GetPortalByJID(key)
|
|
|
|
if len(portal.MXID) == 0 {
|
|
mx.createPrivatePortalFromInvite(roomID, inviter, puppet, portal)
|
|
return
|
|
}
|
|
|
|
err := portal.MainIntent().EnsureInvited(portal.MXID, inviter.MXID)
|
|
if err != nil {
|
|
mx.log.Warnfln("Failed to invite %s to existing private chat portal %s with %s: %v. Redirecting portal to new room...", inviter.MXID, portal.MXID, puppet.JID, err)
|
|
mx.createPrivatePortalFromInvite(roomID, inviter, puppet, portal)
|
|
return
|
|
}
|
|
intent := puppet.DefaultIntent()
|
|
errorMessage := fmt.Sprintf("You already have a private chat portal with me at [%[1]s](https://matrix.to/#/%[1]s)", portal.MXID)
|
|
errorContent := format.RenderMarkdown(errorMessage, true, false)
|
|
_, _ = intent.SendMessageEvent(roomID, event.EventMessage, errorContent)
|
|
mx.log.Debugfln("Leaving private chat room %s as %s after accepting invite from %s as we already have chat with the user", roomID, puppet.MXID, inviter.MXID)
|
|
_, _ = intent.LeaveRoom(roomID)
|
|
}
|
|
|
|
func (mx *MatrixHandler) createPrivatePortalFromInvite(roomID id.RoomID, inviter *User, puppet *Puppet, portal *Portal) {
|
|
portal.MXID = roomID
|
|
portal.Topic = PrivateChatTopic
|
|
_, _ = portal.MainIntent().SetRoomTopic(portal.MXID, portal.Topic)
|
|
if portal.bridge.Config.Bridge.PrivateChatPortalMeta {
|
|
portal.Name = puppet.Displayname
|
|
portal.AvatarURL = puppet.AvatarURL
|
|
portal.Avatar = puppet.Avatar
|
|
_, _ = portal.MainIntent().SetRoomName(portal.MXID, portal.Name)
|
|
_, _ = portal.MainIntent().SetRoomAvatar(portal.MXID, portal.AvatarURL)
|
|
} else {
|
|
portal.Name = ""
|
|
}
|
|
portal.log.Infofln("Created private chat portal in %s after invite from %s", roomID, inviter.MXID)
|
|
intent := puppet.DefaultIntent()
|
|
|
|
if mx.bridge.Config.Bridge.Encryption.Default {
|
|
_, err := intent.InviteUser(roomID, &mautrix.ReqInviteUser{UserID: mx.bridge.Bot.UserID})
|
|
if err != nil {
|
|
portal.log.Warnln("Failed to invite bridge bot to enable e2be:", err)
|
|
}
|
|
err = mx.bridge.Bot.EnsureJoined(roomID)
|
|
if err != nil {
|
|
portal.log.Warnln("Failed to join as bridge bot to enable e2be:", err)
|
|
}
|
|
_, err = intent.SendStateEvent(roomID, event.StateEncryption, "", &event.EncryptionEventContent{Algorithm: id.AlgorithmMegolmV1})
|
|
if err != nil {
|
|
portal.log.Warnln("Failed to enable e2be:", err)
|
|
}
|
|
mx.as.StateStore.SetMembership(roomID, inviter.MXID, event.MembershipJoin)
|
|
mx.as.StateStore.SetMembership(roomID, puppet.MXID, event.MembershipJoin)
|
|
mx.as.StateStore.SetMembership(roomID, mx.bridge.Bot.UserID, event.MembershipJoin)
|
|
portal.Encrypted = true
|
|
}
|
|
portal.Update()
|
|
portal.UpdateBridgeInfo()
|
|
_, _ = intent.SendNotice(roomID, "Private chat portal created")
|
|
|
|
//err := portal.FillInitialHistory(inviter)
|
|
//if err != nil {
|
|
// portal.log.Errorln("Failed to fill history:", err)
|
|
//}
|
|
}
|
|
|
|
func (mx *MatrixHandler) HandlePuppetInvite(evt *event.Event, inviter *User, puppet *Puppet) {
|
|
intent := puppet.DefaultIntent()
|
|
members := mx.joinAndCheckMembers(evt, intent)
|
|
if members == nil {
|
|
return
|
|
}
|
|
var hasBridgeBot, hasOtherUsers bool
|
|
for mxid, _ := range members.Joined {
|
|
if mxid == intent.UserID || mxid == inviter.MXID {
|
|
continue
|
|
} else if mxid == mx.bridge.Bot.UserID {
|
|
hasBridgeBot = true
|
|
} else {
|
|
hasOtherUsers = true
|
|
}
|
|
}
|
|
if !hasBridgeBot && !hasOtherUsers {
|
|
key := database.NewPortalKey(puppet.JID, inviter.JID)
|
|
mx.handlePrivatePortal(evt.RoomID, inviter, puppet, key)
|
|
} else if !hasBridgeBot {
|
|
mx.log.Debugln("Leaving multi-user room", evt.RoomID, "as", puppet.MXID, "after accepting invite from", evt.Sender)
|
|
_, _ = intent.SendNotice(evt.RoomID, "Please invite the bridge bot first if you want to bridge to a WhatsApp group.")
|
|
_, _ = intent.LeaveRoom(evt.RoomID)
|
|
} else {
|
|
_, _ = intent.SendNotice(evt.RoomID, "This puppet will remain inactive until this room is bridged to a WhatsApp group.")
|
|
}
|
|
}
|
|
|
|
func (mx *MatrixHandler) HandleMembership(evt *event.Event) {
|
|
if _, isPuppet := mx.bridge.ParsePuppetMXID(evt.Sender); evt.Sender == mx.bridge.Bot.UserID || isPuppet {
|
|
return
|
|
}
|
|
defer mx.bridge.Metrics.TrackMatrixEvent(evt.Type)()
|
|
|
|
if mx.bridge.Crypto != nil {
|
|
mx.bridge.Crypto.HandleMemberEvent(evt)
|
|
}
|
|
|
|
content := evt.Content.AsMember()
|
|
if content.Membership == event.MembershipInvite && id.UserID(evt.GetStateKey()) == mx.as.BotMXID() {
|
|
mx.HandleBotInvite(evt)
|
|
return
|
|
}
|
|
|
|
if mx.shouldIgnoreEvent(evt) {
|
|
return
|
|
}
|
|
|
|
user := mx.bridge.GetUserByMXID(evt.Sender)
|
|
if user == nil || !user.Whitelisted || !user.IsLoggedIn() {
|
|
return
|
|
}
|
|
|
|
portal := mx.bridge.GetPortalByMXID(evt.RoomID)
|
|
if portal == nil {
|
|
puppet := mx.bridge.GetPuppetByMXID(id.UserID(evt.GetStateKey()))
|
|
if content.Membership == event.MembershipInvite && puppet != nil {
|
|
mx.HandlePuppetInvite(evt, user, puppet)
|
|
}
|
|
return
|
|
}
|
|
|
|
isSelf := id.UserID(evt.GetStateKey()) == evt.Sender
|
|
|
|
if content.Membership == event.MembershipLeave {
|
|
if isSelf {
|
|
if evt.Unsigned.PrevContent != nil {
|
|
_ = evt.Unsigned.PrevContent.ParseRaw(evt.Type)
|
|
prevContent, ok := evt.Unsigned.PrevContent.Parsed.(*event.MemberEventContent)
|
|
if ok {
|
|
if portal.IsPrivateChat() || prevContent.Membership == "join" {
|
|
portal.HandleMatrixLeave(user)
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
portal.HandleMatrixKick(user, evt)
|
|
}
|
|
} else if content.Membership == event.MembershipInvite && !isSelf {
|
|
portal.HandleMatrixInvite(user, evt)
|
|
}
|
|
}
|
|
|
|
func (mx *MatrixHandler) HandleRoomMetadata(evt *event.Event) {
|
|
defer mx.bridge.Metrics.TrackMatrixEvent(evt.Type)()
|
|
if mx.shouldIgnoreEvent(evt) {
|
|
return
|
|
}
|
|
|
|
user := mx.bridge.GetUserByMXID(evt.Sender)
|
|
if user == nil || !user.Whitelisted || !user.IsLoggedIn() {
|
|
return
|
|
}
|
|
|
|
portal := mx.bridge.GetPortalByMXID(evt.RoomID)
|
|
if portal == nil || portal.IsPrivateChat() {
|
|
return
|
|
}
|
|
|
|
portal.HandleMatrixMeta(user, evt)
|
|
}
|
|
|
|
func (mx *MatrixHandler) shouldIgnoreEvent(evt *event.Event) bool {
|
|
if _, isPuppet := mx.bridge.ParsePuppetMXID(evt.Sender); evt.Sender == mx.bridge.Bot.UserID || isPuppet {
|
|
return true
|
|
}
|
|
isCustomPuppet, ok := evt.Content.Raw["net.maunium.whatsapp.puppet"].(bool)
|
|
if ok && isCustomPuppet && mx.bridge.GetPuppetByCustomMXID(evt.Sender) != nil {
|
|
return true
|
|
}
|
|
user := mx.bridge.GetUserByMXID(evt.Sender)
|
|
if !user.RelayWhitelisted {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
const sessionWaitTimeout = 5 * time.Second
|
|
|
|
func (mx *MatrixHandler) HandleEncrypted(evt *event.Event) {
|
|
defer mx.bridge.Metrics.TrackMatrixEvent(evt.Type)()
|
|
if mx.shouldIgnoreEvent(evt) || mx.bridge.Crypto == nil {
|
|
return
|
|
}
|
|
|
|
decrypted, err := mx.bridge.Crypto.Decrypt(evt)
|
|
if errors.Is(err, NoSessionFound) {
|
|
content := evt.Content.AsEncrypted()
|
|
mx.log.Debugfln("Couldn't find session %s trying to decrypt %s, waiting %d seconds...", content.SessionID, evt.ID, int(sessionWaitTimeout.Seconds()))
|
|
if mx.bridge.Crypto.WaitForSession(evt.RoomID, content.SenderKey, content.SessionID, sessionWaitTimeout) {
|
|
mx.log.Debugfln("Got session %s after waiting, trying to decrypt %s again", content.SessionID, evt.ID)
|
|
decrypted, err = mx.bridge.Crypto.Decrypt(evt)
|
|
} else {
|
|
go mx.waitLongerForSession(evt)
|
|
return
|
|
}
|
|
}
|
|
if err != nil {
|
|
mx.log.Warnfln("Failed to decrypt %s: %v", evt.ID, err)
|
|
_, _ = mx.bridge.Bot.SendNotice(evt.RoomID, fmt.Sprintf(
|
|
"\u26a0 Your message was not bridged: %v", err))
|
|
return
|
|
}
|
|
mx.bridge.EventProcessor.Dispatch(decrypted)
|
|
}
|
|
|
|
func (mx *MatrixHandler) waitLongerForSession(evt *event.Event) {
|
|
const extendedTimeout = sessionWaitTimeout * 2
|
|
|
|
content := evt.Content.AsEncrypted()
|
|
mx.log.Debugfln("Couldn't find session %s trying to decrypt %s, waiting %d more seconds...",
|
|
content.SessionID, evt.ID, int(extendedTimeout.Seconds()))
|
|
|
|
resp, err := mx.bridge.Bot.SendNotice(evt.RoomID, fmt.Sprintf(
|
|
"\u26a0 Your message was not bridged: the bridge hasn't received the decryption keys. "+
|
|
"The bridge will retry for %d seconds. If this error keeps happening, try restarting your client.",
|
|
int(extendedTimeout.Seconds())))
|
|
if err != nil {
|
|
mx.log.Errorfln("Failed to send decryption error to %s: %v", evt.RoomID, err)
|
|
}
|
|
update := event.MessageEventContent{MsgType: event.MsgNotice}
|
|
|
|
if mx.bridge.Crypto.WaitForSession(evt.RoomID, content.SenderKey, content.SessionID, extendedTimeout) {
|
|
mx.log.Debugfln("Got session %s after waiting more, trying to decrypt %s again", content.SessionID, evt.ID)
|
|
decrypted, err := mx.bridge.Crypto.Decrypt(evt)
|
|
if err == nil {
|
|
mx.bridge.EventProcessor.Dispatch(decrypted)
|
|
_, _ = mx.bridge.Bot.RedactEvent(evt.RoomID, resp.EventID)
|
|
return
|
|
}
|
|
mx.log.Warnfln("Failed to decrypt %s: %v", err)
|
|
update.Body = fmt.Sprintf("\u26a0 Your message was not bridged: %v", err)
|
|
} else {
|
|
mx.log.Debugfln("Didn't get %s, giving up on %s", content.SessionID, evt.ID)
|
|
update.Body = "\u26a0 Your message was not bridged: the bridge hasn't received the decryption keys. " +
|
|
"If this keeps happening, try restarting your client."
|
|
}
|
|
|
|
newContent := update
|
|
update.NewContent = &newContent
|
|
if resp != nil {
|
|
update.RelatesTo = &event.RelatesTo{
|
|
Type: event.RelReplace,
|
|
EventID: resp.EventID,
|
|
}
|
|
}
|
|
_, _ = mx.bridge.Bot.SendMessageEvent(evt.RoomID, event.EventMessage, &update)
|
|
}
|
|
|
|
func (mx *MatrixHandler) HandleMessage(evt *event.Event) {
|
|
defer mx.bridge.Metrics.TrackMatrixEvent(evt.Type)()
|
|
if mx.shouldIgnoreEvent(evt) {
|
|
return
|
|
}
|
|
|
|
user := mx.bridge.GetUserByMXID(evt.Sender)
|
|
content := evt.Content.AsMessage()
|
|
if user.Whitelisted && content.MsgType == event.MsgText {
|
|
commandPrefix := mx.bridge.Config.Bridge.CommandPrefix
|
|
hasCommandPrefix := strings.HasPrefix(content.Body, commandPrefix)
|
|
if hasCommandPrefix {
|
|
content.Body = strings.TrimLeft(content.Body[len(commandPrefix):], " ")
|
|
}
|
|
if hasCommandPrefix || evt.RoomID == user.ManagementRoom {
|
|
mx.cmd.Handle(evt.RoomID, user, content.Body)
|
|
return
|
|
}
|
|
}
|
|
|
|
portal := mx.bridge.GetPortalByMXID(evt.RoomID)
|
|
if portal != nil && (user.Whitelisted || portal.HasRelaybot()) {
|
|
portal.HandleMatrixMessage(user, evt)
|
|
}
|
|
}
|
|
|
|
func (mx *MatrixHandler) HandleRedaction(evt *event.Event) {
|
|
defer mx.bridge.Metrics.TrackMatrixEvent(evt.Type)()
|
|
if _, isPuppet := mx.bridge.ParsePuppetMXID(evt.Sender); evt.Sender == mx.bridge.Bot.UserID || isPuppet {
|
|
return
|
|
}
|
|
|
|
user := mx.bridge.GetUserByMXID(evt.Sender)
|
|
|
|
if !user.Whitelisted {
|
|
return
|
|
}
|
|
|
|
if !user.HasSession() {
|
|
return
|
|
} else if !user.IsLoggedIn() {
|
|
msg := format.RenderMarkdown(fmt.Sprintf("[%[1]s](https://matrix.to/#/%[1]s): \u26a0 "+
|
|
"You are not connected to WhatsApp, so your redaction was not bridged. "+
|
|
"Use `%[2]s reconnect` to reconnect.", user.MXID, mx.bridge.Config.Bridge.CommandPrefix), true, false)
|
|
msg.MsgType = event.MsgNotice
|
|
_, _ = mx.bridge.Bot.SendMessageEvent(evt.RoomID, event.EventMessage, msg)
|
|
return
|
|
}
|
|
|
|
portal := mx.bridge.GetPortalByMXID(evt.RoomID)
|
|
if portal != nil {
|
|
portal.HandleMatrixRedaction(user, evt)
|
|
}
|
|
}
|