mautrix-whatsapp/custompuppet.go

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// mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge.
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// 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 (
"crypto/hmac"
"crypto/sha512"
"encoding/hex"
"time"
"github.com/pkg/errors"
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"github.com/Rhymen/go-whatsapp"
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"maunium.net/go/mautrix"
appservice "maunium.net/go/mautrix-appservice"
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"maunium.net/go/mautrix/event"
"maunium.net/go/mautrix/id"
)
var (
ErrNoCustomMXID = errors.New("no custom mxid set")
ErrMismatchingMXID = errors.New("whoami result does not match custom mxid")
)
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func (puppet *Puppet) SwitchCustomMXID(accessToken string, mxid id.UserID) error {
prevCustomMXID := puppet.CustomMXID
if puppet.customIntent != nil {
puppet.stopSyncing()
}
puppet.CustomMXID = mxid
puppet.AccessToken = accessToken
err := puppet.StartCustomMXID()
if err != nil {
return err
}
if len(prevCustomMXID) > 0 {
delete(puppet.bridge.puppetsByCustomMXID, prevCustomMXID)
}
if len(puppet.CustomMXID) > 0 {
puppet.bridge.puppetsByCustomMXID[puppet.CustomMXID] = puppet
}
puppet.bridge.AS.StateStore.MarkRegistered(puppet.CustomMXID)
puppet.Update()
// TODO leave rooms with default puppet
return nil
}
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func (puppet *Puppet) loginWithSharedSecret(mxid id.UserID) (string, error) {
mac := hmac.New(sha512.New, []byte(puppet.bridge.Config.Bridge.LoginSharedSecret))
mac.Write([]byte(mxid))
resp, err := puppet.bridge.AS.BotClient().Login(&mautrix.ReqLogin{
Type: "m.login.password",
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Identifier: mautrix.UserIdentifier{Type: "m.id.user", User: string(mxid)},
Password: hex.EncodeToString(mac.Sum(nil)),
DeviceID: "WhatsApp Bridge",
InitialDeviceDisplayName: "WhatsApp Bridge",
})
if err != nil {
return "", err
}
return resp.AccessToken, nil
}
func (puppet *Puppet) newCustomIntent() (*appservice.IntentAPI, error) {
if len(puppet.CustomMXID) == 0 {
return nil, ErrNoCustomMXID
}
client, err := mautrix.NewClient(puppet.bridge.AS.HomeserverURL, puppet.CustomMXID, puppet.AccessToken)
if err != nil {
return nil, err
}
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client.Logger = puppet.bridge.AS.Log.Sub(string(puppet.CustomMXID))
client.Syncer = puppet
client.Store = puppet
ia := puppet.bridge.AS.NewIntentAPI("custom")
ia.Client = client
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ia.Localpart, _, _ = puppet.CustomMXID.Parse()
ia.UserID = puppet.CustomMXID
ia.IsCustomPuppet = true
return ia, nil
}
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func (puppet *Puppet) clearCustomMXID() {
puppet.CustomMXID = ""
puppet.AccessToken = ""
puppet.customIntent = nil
puppet.customTypingIn = nil
puppet.customUser = nil
}
func (puppet *Puppet) StartCustomMXID() error {
if len(puppet.CustomMXID) == 0 {
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puppet.clearCustomMXID()
return nil
}
intent, err := puppet.newCustomIntent()
if err != nil {
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puppet.clearCustomMXID()
return err
}
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resp, err := intent.Whoami()
if err != nil {
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puppet.clearCustomMXID()
return err
}
if resp.UserID != puppet.CustomMXID {
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puppet.clearCustomMXID()
return ErrMismatchingMXID
}
puppet.customIntent = intent
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puppet.customTypingIn = make(map[id.RoomID]bool)
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puppet.customUser = puppet.bridge.GetUserByMXID(puppet.CustomMXID)
puppet.startSyncing()
return nil
}
func (puppet *Puppet) startSyncing() {
if !puppet.bridge.Config.Bridge.SyncWithCustomPuppets {
return
}
go func() {
puppet.log.Debugln("Starting syncing...")
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puppet.customIntent.SyncPresence = "offline"
err := puppet.customIntent.Sync()
if err != nil {
puppet.log.Errorln("Fatal error syncing:", err)
}
}()
}
func (puppet *Puppet) stopSyncing() {
if !puppet.bridge.Config.Bridge.SyncWithCustomPuppets {
return
}
puppet.customIntent.StopSync()
}
func (puppet *Puppet) ProcessResponse(resp *mautrix.RespSync, since string) error {
if !puppet.customUser.IsConnected() {
puppet.log.Debugln("Skipping sync processing: custom user not connected to whatsapp")
return nil
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}
for roomID, events := range resp.Rooms.Join {
portal := puppet.bridge.GetPortalByMXID(roomID)
if portal == nil {
continue
}
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for _, evt := range events.Ephemeral.Events {
err := evt.Content.ParseRaw(evt.Type)
if err != nil {
continue
}
switch evt.Type {
case event.EphemeralEventReceipt:
go puppet.handleReceiptEvent(portal, evt)
case event.EphemeralEventTyping:
go puppet.handleTypingEvent(portal, evt)
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}
}
}
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for _, evt := range resp.Presence.Events {
if evt.Sender != puppet.CustomMXID {
continue
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}
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err := evt.Content.ParseRaw(evt.Type)
if err != nil {
continue
}
go puppet.handlePresenceEvent(evt)
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}
return nil
}
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func (puppet *Puppet) handlePresenceEvent(event *event.Event) {
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presence := whatsapp.PresenceAvailable
if event.Content.Raw["presence"].(string) != "online" {
presence = whatsapp.PresenceUnavailable
puppet.customUser.log.Infoln("Marking offline")
} else {
puppet.customUser.log.Infoln("Marking online")
}
_, err := puppet.customUser.Conn.Presence("", presence)
if err != nil {
puppet.customUser.log.Warnln("Failed to set presence:", err)
}
}
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func (puppet *Puppet) handleReceiptEvent(portal *Portal, event *event.Event) {
for eventID, receipts := range *event.Content.AsReceipt() {
if _, ok := receipts.Read[puppet.CustomMXID]; !ok {
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continue
}
message := puppet.bridge.DB.Message.GetByMXID(eventID)
if message == nil {
continue
}
puppet.customUser.log.Infofln("Marking %s/%s in %s/%s as read", message.JID, message.MXID, portal.Key.JID, portal.MXID)
_, err := puppet.customUser.Conn.Read(portal.Key.JID, message.JID)
if err != nil {
puppet.customUser.log.Warnln("Error marking read:", err)
}
}
}
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func (puppet *Puppet) handleTypingEvent(portal *Portal, evt *event.Event) {
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isTyping := false
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for _, userID := range evt.Content.AsTyping().UserIDs {
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if userID == puppet.CustomMXID {
isTyping = true
break
}
}
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if puppet.customTypingIn[evt.RoomID] != isTyping {
puppet.customTypingIn[evt.RoomID] = isTyping
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presence := whatsapp.PresenceComposing
if !isTyping {
puppet.customUser.log.Infofln("Marking not typing in %s/%s", portal.Key.JID, portal.MXID)
presence = whatsapp.PresencePaused
} else {
puppet.customUser.log.Infofln("Marking typing in %s/%s", portal.Key.JID, portal.MXID)
}
_, err := puppet.customUser.Conn.Presence(portal.Key.JID, presence)
if err != nil {
puppet.customUser.log.Warnln("Error setting typing:", err)
}
}
}
func (puppet *Puppet) OnFailedSync(res *mautrix.RespSync, err error) (time.Duration, error) {
puppet.log.Warnln("Sync error:", err)
return 10 * time.Second, nil
}
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func (puppet *Puppet) GetFilterJSON(_ id.UserID) *mautrix.Filter {
everything := []event.Type{{Type: "*"}}
return &mautrix.Filter{
Presence: mautrix.FilterPart{
Senders: []id.UserID{puppet.CustomMXID},
Types: []event.Type{event.EphemeralEventPresence},
},
AccountData: mautrix.FilterPart{NotTypes: everything},
Room: mautrix.RoomFilter{
Ephemeral: mautrix.FilterPart{Types: []event.Type{event.EphemeralEventTyping, event.EphemeralEventReceipt}},
IncludeLeave: false,
AccountData: mautrix.FilterPart{NotTypes: everything},
State: mautrix.FilterPart{NotTypes: everything},
Timeline: mautrix.FilterPart{NotTypes: everything},
},
}
}
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func (puppet *Puppet) SaveFilterID(_ id.UserID, _ string) {}
func (puppet *Puppet) SaveNextBatch(_ id.UserID, nbt string) { puppet.NextBatch = nbt; puppet.Update() }
func (puppet *Puppet) SaveRoom(room *mautrix.Room) {}
func (puppet *Puppet) LoadFilterID(_ id.UserID) string { return "" }
func (puppet *Puppet) LoadNextBatch(_ id.UserID) string { return puppet.NextBatch }
func (puppet *Puppet) LoadRoom(roomID id.RoomID) *mautrix.Room { return nil }