mautrix-whatsapp/matrix.go
2019-11-10 21:22:11 +02:00

233 lines
7 KiB
Go

// 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 (
"fmt"
"strings"
"maunium.net/go/maulogger/v2"
"maunium.net/go/mautrix"
"maunium.net/go/mautrix-appservice"
"maunium.net/go/mautrix/format"
"maunium.net/go/mautrix-whatsapp/types"
)
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(mautrix.EventMessage, handler.HandleMessage)
bridge.EventProcessor.On(mautrix.EventRedaction, handler.HandleRedaction)
bridge.EventProcessor.On(mautrix.StateMember, handler.HandleMembership)
bridge.EventProcessor.On(mautrix.StateRoomName, handler.HandleRoomMetadata)
bridge.EventProcessor.On(mautrix.StateRoomAvatar, handler.HandleRoomMetadata)
bridge.EventProcessor.On(mautrix.StateTopic, handler.HandleRoomMetadata)
return handler
}
func (mx *MatrixHandler) HandleBotInvite(evt *mautrix.Event) {
intent := mx.as.BotIntent()
user := mx.bridge.GetUserByMXID(evt.Sender)
if user == nil {
return
}
resp, err := intent.JoinRoom(evt.RoomID, "", nil)
if err != nil {
mx.log.Debugln("Failed to join room", evt.RoomID, "with invite from", evt.Sender)
return
}
members, err := intent.JoinedMembers(resp.RoomID)
if err != nil {
mx.log.Debugln("Failed to get members in room", resp.RoomID, "after accepting invite from", evt.Sender)
intent.LeaveRoom(resp.RoomID)
return
}
if len(members.Joined) < 2 {
mx.log.Debugln("Leaving empty room", resp.RoomID, "after accepting invite from", evt.Sender)
intent.LeaveRoom(resp.RoomID)
return
}
if !user.Whitelisted {
intent.SendNotice(resp.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(resp.RoomID)
return
}
if evt.RoomID == mx.bridge.Config.Bridge.Relaybot.ManagementRoom {
intent.SendNotice(evt.RoomID, "This is the relaybot management room. Send `!wa help` to get a list of commands.")
mx.log.Debugln("Joined relaybot management room", evt.RoomID, "after invite from", evt.Sender)
return
}
hasPuppets := false
for mxid, _ := range members.Joined {
if mxid == intent.UserID || mxid == evt.Sender {
continue
} else if _, ok := mx.bridge.ParsePuppetMXID(types.MatrixUserID(mxid)); ok {
hasPuppets = true
continue
}
mx.log.Debugln("Leaving multi-user room", resp.RoomID, "after accepting invite from", evt.Sender)
intent.SendNotice(resp.RoomID, "This bridge is user-specific, please don't invite me into rooms with other users.")
intent.LeaveRoom(resp.RoomID)
return
}
if !hasPuppets {
user := mx.bridge.GetUserByMXID(types.MatrixUserID(evt.Sender))
user.SetManagementRoom(types.MatrixRoomID(resp.RoomID))
intent.SendNotice(string(user.ManagementRoom), "This room has been registered as your bridge management/status room. Send `help` to get a list of commands.")
mx.log.Debugln(resp.RoomID, "registered as a management room with", evt.Sender)
}
}
func (mx *MatrixHandler) HandleMembership(evt *mautrix.Event) {
if evt.Content.Membership == "invite" && evt.GetStateKey() == mx.as.BotMXID() {
mx.HandleBotInvite(evt)
}
portal := mx.bridge.GetPortalByMXID(evt.RoomID)
if portal == nil {
return
}
user := mx.bridge.GetUserByMXID(types.MatrixUserID(evt.Sender))
if user == nil || !user.Whitelisted || !user.IsConnected() {
return
}
if evt.Content.Membership == "leave" {
if evt.GetStateKey() == evt.Sender {
if portal.IsPrivateChat() || evt.Unsigned.PrevContent.Membership == "join" {
portal.HandleMatrixLeave(user)
}
} else {
portal.HandleMatrixKick(user, evt)
}
}
}
func (mx *MatrixHandler) HandleRoomMetadata(evt *mautrix.Event) {
user := mx.bridge.GetUserByMXID(types.MatrixUserID(evt.Sender))
if user == nil || !user.Whitelisted || !user.IsConnected() {
return
}
portal := mx.bridge.GetPortalByMXID(evt.RoomID)
if portal == nil || portal.IsPrivateChat() {
return
}
var resp <-chan string
var err error
switch evt.Type {
case mautrix.StateRoomName:
resp, err = user.Conn.UpdateGroupSubject(evt.Content.Name, portal.Key.JID)
case mautrix.StateRoomAvatar:
return
case mautrix.StateTopic:
return
}
if err != nil {
mx.log.Errorln(err)
} else {
out := <-resp
mx.log.Infoln(out)
}
}
func (mx *MatrixHandler) HandleMessage(evt *mautrix.Event) {
if _, isPuppet := mx.bridge.ParsePuppetMXID(evt.Sender); evt.Sender == mx.bridge.Bot.UserID || isPuppet {
return
}
isCustomPuppet, ok := evt.Content.Raw["net.maunium.whatsapp.puppet"].(bool)
if ok && isCustomPuppet && mx.bridge.GetPuppetByCustomMXID(evt.Sender) != nil {
return
}
roomID := types.MatrixRoomID(evt.RoomID)
user := mx.bridge.GetUserByMXID(types.MatrixUserID(evt.Sender))
if !user.RelaybotWhitelisted {
return
}
if user.Whitelisted && evt.Content.MsgType == mautrix.MsgText {
commandPrefix := mx.bridge.Config.Bridge.CommandPrefix
hasCommandPrefix := strings.HasPrefix(evt.Content.Body, commandPrefix)
if hasCommandPrefix {
evt.Content.Body = strings.TrimLeft(evt.Content.Body[len(commandPrefix):], " ")
}
if hasCommandPrefix || roomID == user.ManagementRoom {
mx.cmd.Handle(roomID, user, evt.Content.Body)
return
}
}
portal := mx.bridge.GetPortalByMXID(roomID)
if portal != nil && (user.Whitelisted || portal.HasRelaybot()) {
portal.HandleMatrixMessage(user, evt)
}
}
func (mx *MatrixHandler) HandleRedaction(evt *mautrix.Event) {
if _, isPuppet := mx.bridge.ParsePuppetMXID(evt.Sender); evt.Sender == mx.bridge.Bot.UserID || isPuppet {
return
}
roomID := types.MatrixRoomID(evt.RoomID)
user := mx.bridge.GetUserByMXID(types.MatrixUserID(evt.Sender))
if !user.Whitelisted {
return
}
if !user.HasSession() {
return
} else if !user.IsConnected() {
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))
msg.MsgType = mautrix.MsgNotice
_, _ = mx.bridge.Bot.SendMessageEvent(roomID, mautrix.EventMessage, msg)
return
}
portal := mx.bridge.GetPortalByMXID(roomID)
if portal != nil {
portal.HandleMatrixRedaction(user, evt)
}
}