mirror of
https://github.com/tulir/mautrix-whatsapp
synced 2024-12-13 17:13:11 +01:00
504 lines
13 KiB
Go
504 lines
13 KiB
Go
// mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge.
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// Copyright (C) 2018 Tulir Asokan
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package main
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import (
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"bytes"
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"encoding/hex"
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"fmt"
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"html"
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"image"
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"math/rand"
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"mime"
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"net/http"
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"regexp"
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"strings"
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"sync"
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"github.com/Rhymen/go-whatsapp"
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"maunium.net/go/gomatrix"
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"maunium.net/go/gomatrix/format"
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log "maunium.net/go/maulogger"
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"maunium.net/go/mautrix-appservice"
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"maunium.net/go/mautrix-whatsapp/database"
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"maunium.net/go/mautrix-whatsapp/types"
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"maunium.net/go/mautrix-whatsapp/whatsapp-ext"
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)
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func (user *User) GetPortalByMXID(mxid types.MatrixRoomID) *Portal {
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user.portalsLock.Lock()
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defer user.portalsLock.Unlock()
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portal, ok := user.portalsByMXID[mxid]
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if !ok {
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dbPortal := user.bridge.DB.Portal.GetByMXID(mxid)
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if dbPortal == nil || dbPortal.Owner != user.ID {
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return nil
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}
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portal = user.NewPortal(dbPortal)
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user.portalsByJID[portal.JID] = portal
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if len(portal.MXID) > 0 {
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user.portalsByMXID[portal.MXID] = portal
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}
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}
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return portal
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}
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func (user *User) GetPortalByJID(jid types.WhatsAppID) *Portal {
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user.portalsLock.Lock()
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defer user.portalsLock.Unlock()
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portal, ok := user.portalsByJID[jid]
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if !ok {
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dbPortal := user.bridge.DB.Portal.GetByJID(user.ID, jid)
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if dbPortal == nil {
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dbPortal = user.bridge.DB.Portal.New()
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dbPortal.JID = jid
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dbPortal.Owner = user.ID
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dbPortal.Insert()
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}
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portal = user.NewPortal(dbPortal)
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user.portalsByJID[portal.JID] = portal
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if len(portal.MXID) > 0 {
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user.portalsByMXID[portal.MXID] = portal
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}
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}
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return portal
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}
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func (user *User) GetAllPortals() []*Portal {
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user.portalsLock.Lock()
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defer user.portalsLock.Unlock()
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dbPortals := user.bridge.DB.Portal.GetAll(user.ID)
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output := make([]*Portal, len(dbPortals))
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for index, dbPortal := range dbPortals {
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portal, ok := user.portalsByJID[dbPortal.JID]
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if !ok {
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portal = user.NewPortal(dbPortal)
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user.portalsByJID[dbPortal.JID] = portal
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if len(dbPortal.MXID) > 0 {
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user.portalsByMXID[dbPortal.MXID] = portal
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}
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}
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output[index] = portal
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}
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return output
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}
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func (user *User) NewPortal(dbPortal *database.Portal) *Portal {
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return &Portal{
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Portal: dbPortal,
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user: user,
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bridge: user.bridge,
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log: user.log.Sub(fmt.Sprintf("Portal/%s", dbPortal.JID)),
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}
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}
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type Portal struct {
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*database.Portal
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user *User
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bridge *Bridge
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log log.Logger
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roomCreateLock sync.Mutex
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}
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func (portal *Portal) SyncParticipants(metadata *whatsapp_ext.GroupInfo) {
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for _, participant := range metadata.Participants {
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intent := portal.user.GetPuppetByJID(participant.JID).Intent()
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intent.EnsureJoined(portal.MXID)
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}
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}
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func (portal *Portal) UpdateAvatar() bool {
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avatar, err := portal.user.Conn.GetProfilePicThumb(portal.JID)
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if err != nil {
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portal.log.Errorln(err)
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return false
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}
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if portal.Avatar == avatar.Tag {
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return false
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}
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data, err := avatar.DownloadBytes()
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if err != nil {
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portal.log.Errorln("Failed to download avatar:", err)
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return false
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}
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mimeType := http.DetectContentType(data)
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resp, err := portal.MainIntent().UploadBytes(data, mimeType)
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if err != nil {
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portal.log.Errorln("Failed to upload avatar:", err)
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return false
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}
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_, err = portal.MainIntent().SetRoomAvatar(portal.MXID, resp.ContentURI)
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if err != nil {
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portal.log.Warnln("Failed to set room topic:", err)
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return false
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}
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portal.Avatar = avatar.Tag
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return true
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}
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func (portal *Portal) UpdateName(metadata *whatsapp_ext.GroupInfo) bool {
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if portal.Name != metadata.Name {
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_, err := portal.MainIntent().SetRoomName(portal.MXID, metadata.Name)
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if err == nil {
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portal.Name = metadata.Name
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return true
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}
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portal.log.Warnln("Failed to set room name:", err)
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}
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return false
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}
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func (portal *Portal) UpdateTopic(metadata *whatsapp_ext.GroupInfo) bool {
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if portal.Topic != metadata.Topic {
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_, err := portal.MainIntent().SetRoomTopic(portal.MXID, metadata.Topic)
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if err == nil {
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portal.Topic = metadata.Topic
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return true
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}
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portal.log.Warnln("Failed to set room topic:", err)
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}
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return false
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}
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func (portal *Portal) UpdateMetadata() bool {
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metadata, err := portal.user.Conn.GetGroupMetaData(portal.JID)
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if err != nil {
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portal.log.Errorln(err)
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return false
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}
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portal.SyncParticipants(metadata)
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update := false
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update = portal.UpdateName(metadata) || update
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update = portal.UpdateTopic(metadata) || update
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return update
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}
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func (portal *Portal) Sync(contact whatsapp.Contact) {
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if len(portal.MXID) == 0 {
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if !portal.IsPrivateChat() {
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portal.Name = contact.Name
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}
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err := portal.CreateMatrixRoom()
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if err != nil {
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portal.log.Errorln("Failed to create portal room:", err)
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return
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}
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}
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if portal.IsPrivateChat() {
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return
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}
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update := false
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update = portal.UpdateMetadata() || update
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update = portal.UpdateAvatar() || update
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if update {
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portal.Update()
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}
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}
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func (portal *Portal) CreateMatrixRoom() error {
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portal.roomCreateLock.Lock()
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defer portal.roomCreateLock.Unlock()
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if len(portal.MXID) > 0 {
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return nil
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}
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name := portal.Name
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topic := portal.Topic
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isPrivateChat := false
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if strings.HasSuffix(portal.JID, whatsapp_ext.NewUserSuffix) {
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puppet := portal.user.GetPuppetByJID(portal.JID)
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name = puppet.Displayname
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topic = "WhatsApp private chat"
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isPrivateChat = true
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}
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resp, err := portal.MainIntent().CreateRoom(&gomatrix.ReqCreateRoom{
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Visibility: "private",
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Name: name,
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Topic: topic,
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Invite: []string{portal.user.ID},
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Preset: "private_chat",
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IsDirect: isPrivateChat,
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})
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if err != nil {
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return err
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}
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portal.MXID = resp.RoomID
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portal.Update()
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return nil
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}
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func (portal *Portal) IsPrivateChat() bool {
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return strings.HasSuffix(portal.JID, whatsapp_ext.NewUserSuffix)
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}
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func (portal *Portal) MainIntent() *appservice.IntentAPI {
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if portal.IsPrivateChat() {
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return portal.user.GetPuppetByJID(portal.JID).Intent()
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}
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return portal.bridge.AppService.BotIntent()
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}
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func (portal *Portal) IsDuplicate(id types.WhatsAppMessageID) bool {
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msg := portal.bridge.DB.Message.GetByJID(portal.Owner, id)
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if msg != nil {
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portal.log.Debugln("Ignoring duplicate message", id)
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return true
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}
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return false
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}
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func (portal *Portal) MarkHandled(jid types.WhatsAppMessageID, mxid types.MatrixEventID) {
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msg := portal.bridge.DB.Message.New()
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msg.Owner = portal.Owner
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msg.JID = jid
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msg.MXID = mxid
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msg.Insert()
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}
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func (portal *Portal) GetMessageIntent(info whatsapp.MessageInfo) *appservice.IntentAPI {
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if info.FromMe {
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portal.log.Debugln("Unhandled message from me:", info.Id)
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return nil
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} else if portal.IsPrivateChat() {
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return portal.MainIntent()
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}
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puppet := portal.user.GetPuppetByJID(info.SenderJid)
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return puppet.Intent()
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}
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func (portal *Portal) SetReply(content *gomatrix.Content, info whatsapp.MessageInfo) {
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if len(info.QuotedMessageID) == 0 {
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return
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}
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message := portal.bridge.DB.Message.GetByJID(portal.Owner, info.QuotedMessageID)
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if message != nil {
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event, err := portal.MainIntent().GetEvent(portal.MXID, message.MXID)
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if err != nil {
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portal.log.Warnln("Failed to get reply target:", err)
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return
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}
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content.SetReply(event)
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}
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return
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}
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var codeBlockRegex = regexp.MustCompile("```((?:.|\n)+?)```")
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var italicRegex = regexp.MustCompile("([\\s>~*]|^)_(.+?)_([^a-zA-Z\\d]|$)")
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var boldRegex = regexp.MustCompile("([\\s>_~]|^)\\*(.+?)\\*([^a-zA-Z\\d]|$)")
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var strikethroughRegex = regexp.MustCompile("([\\s>_*]|^)~(.+?)~([^a-zA-Z\\d]|$)")
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var whatsAppFormat = map[*regexp.Regexp]string{
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codeBlockRegex: "<pre>$1</pre>",
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italicRegex: "$1<em>$2</em>$3",
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boldRegex: "$1<strong>$2</strong>$3",
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strikethroughRegex: "$1<del>$2</del>$3",
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}
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func (portal *Portal) ParseWhatsAppFormat(input string) string {
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output := html.EscapeString(input)
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for regex, replacement := range whatsAppFormat {
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output = regex.ReplaceAllString(output, replacement)
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}
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return output
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}
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func (portal *Portal) HandleTextMessage(message whatsapp.TextMessage) {
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if portal.IsDuplicate(message.Info.Id) {
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return
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}
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err := portal.CreateMatrixRoom()
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if err != nil {
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portal.log.Errorln("Failed to create portal room:", err)
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return
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}
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intent := portal.GetMessageIntent(message.Info)
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if intent == nil {
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return
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}
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content := gomatrix.Content{
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Body: message.Text,
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MsgType: gomatrix.MsgText,
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}
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htmlBody := portal.ParseWhatsAppFormat(message.Text)
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if htmlBody != message.Text {
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content.FormattedBody = htmlBody
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content.Format = gomatrix.FormatHTML
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}
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portal.SetReply(&content, message.Info)
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intent.UserTyping(portal.MXID, false, 0)
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resp, err := intent.SendMassagedMessageEvent(portal.MXID, gomatrix.EventMessage, content, int64(message.Info.Timestamp*1000))
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if err != nil {
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portal.log.Errorfln("Failed to handle message %s: %v", message.Info.Id, err)
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return
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}
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portal.MarkHandled(message.Info.Id, resp.EventID)
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portal.log.Debugln("Handled message", message.Info.Id, "->", resp.EventID)
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}
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func (portal *Portal) HandleMediaMessage(download func() ([]byte, error), thumbnail []byte, info whatsapp.MessageInfo, mimeType, caption string) {
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if portal.IsDuplicate(info.Id) {
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return
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}
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err := portal.CreateMatrixRoom()
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if err != nil {
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portal.log.Errorln("Failed to create portal room:", err)
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return
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}
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intent := portal.GetMessageIntent(info)
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if intent == nil {
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return
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}
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data, err := download()
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if err != nil {
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portal.log.Errorln("Failed to download media:", err)
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return
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}
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uploaded, err := intent.UploadBytes(data, mimeType)
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if err != nil {
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portal.log.Errorln("Failed to upload media:", err)
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return
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}
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if len(caption) == 0 {
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caption = info.Id
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exts, _ := mime.ExtensionsByType(mimeType)
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if exts != nil && len(exts) > 0 {
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caption += exts[0]
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}
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}
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content := gomatrix.Content{
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Body: caption,
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URL: uploaded.ContentURI,
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Info: &gomatrix.FileInfo{
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Size: len(data),
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MimeType: mimeType,
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},
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}
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portal.SetReply(&content, info)
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if thumbnail != nil {
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thumbnailMime := http.DetectContentType(thumbnail)
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uploadedThumbnail, _ := intent.UploadBytes(thumbnail, thumbnailMime)
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if uploadedThumbnail != nil {
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content.Info.ThumbnailURL = uploadedThumbnail.ContentURI
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cfg, _, _ := image.DecodeConfig(bytes.NewReader(data))
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content.Info.ThumbnailInfo = &gomatrix.FileInfo{
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Size: len(thumbnail),
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Width: cfg.Width,
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Height: cfg.Height,
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MimeType: thumbnailMime,
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}
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}
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}
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switch strings.ToLower(strings.Split(mimeType, "/")[0]) {
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case "image":
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content.MsgType = gomatrix.MsgImage
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cfg, _, _ := image.DecodeConfig(bytes.NewReader(data))
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content.Info.Width = cfg.Width
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content.Info.Height = cfg.Height
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case "video":
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content.MsgType = gomatrix.MsgVideo
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case "audio":
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content.MsgType = gomatrix.MsgAudio
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default:
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content.MsgType = gomatrix.MsgFile
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}
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intent.UserTyping(portal.MXID, false, 0)
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resp, err := intent.SendMassagedMessageEvent(portal.MXID, gomatrix.EventMessage, content, int64(info.Timestamp*1000))
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if err != nil {
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portal.log.Errorfln("Failed to handle message %s: %v", info.Id, err)
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return
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}
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portal.MarkHandled(info.Id, resp.EventID)
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portal.log.Debugln("Handled message", info.Id, "->", resp.EventID)
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}
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var htmlParser = format.HTMLParser{
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TabsToSpaces: 4,
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Newline: "\n",
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PillConverter: func(mxid, eventID string) string {
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return mxid
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},
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BoldConverter: func(text string) string {
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return fmt.Sprintf("*%s*", text)
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},
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ItalicConverter: func(text string) string {
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return fmt.Sprintf("_%s_", text)
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},
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StrikethroughConverter: func(text string) string {
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return fmt.Sprintf("~%s~", text)
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},
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MonospaceConverter: func(text string) string {
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return fmt.Sprintf("```%s```", text)
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},
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MonospaceBlockConverter: func(text string) string {
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return fmt.Sprintf("```%s```", text)
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},
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}
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func makeMessageID() string {
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b := make([]byte, 10)
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rand.Read(b)
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return strings.ToUpper(hex.EncodeToString(b))
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}
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func (portal *Portal) HandleMatrixMessage(evt *gomatrix.Event) {
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var err error
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switch evt.Content.MsgType {
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case gomatrix.MsgText:
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text := evt.Content.Body
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if evt.Content.Format == gomatrix.FormatHTML {
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text = htmlParser.Parse(evt.Content.FormattedBody)
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}
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id := makeMessageID()
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err = portal.user.Conn.Send(whatsapp.TextMessage{
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Text: text,
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Info: whatsapp.MessageInfo{
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Id: id,
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RemoteJid: portal.JID,
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},
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})
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portal.MarkHandled(id, evt.ID)
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default:
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portal.log.Debugln("Unhandled Matrix event:", evt)
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return
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}
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if err != nil {
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portal.log.Errorfln("Error handling Matrix event %s: %v", evt.ID, err)
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} else {
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portal.log.Debugln("Handled Matrix event:", evt)
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}
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}
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