forked from jshiffer/matterbridge
269 lines
9.0 KiB
Go
269 lines
9.0 KiB
Go
// Copyright (c) 2021 Tulir Asokan
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package whatsmeow
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import (
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"errors"
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"go.mau.fi/whatsmeow/appstate"
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waBinary "go.mau.fi/whatsmeow/binary"
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"go.mau.fi/whatsmeow/store"
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"go.mau.fi/whatsmeow/types"
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"go.mau.fi/whatsmeow/types/events"
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)
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func (cli *Client) handleEncryptNotification(node *waBinary.Node) {
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from := node.AttrGetter().JID("from")
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if from == types.ServerJID {
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count := node.GetChildByTag("count")
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ag := count.AttrGetter()
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otksLeft := ag.Int("value")
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if !ag.OK() {
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cli.Log.Warnf("Didn't get number of OTKs left in encryption notification %s", node.XMLString())
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return
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}
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cli.Log.Infof("Got prekey count from server: %s", node.XMLString())
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if otksLeft < MinPreKeyCount {
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cli.uploadPreKeys()
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}
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} else if _, ok := node.GetOptionalChildByTag("identity"); ok {
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cli.Log.Debugf("Got identity change for %s: %s, deleting all identities/sessions for that number", from, node.XMLString())
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err := cli.Store.Identities.DeleteAllIdentities(from.User)
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if err != nil {
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cli.Log.Warnf("Failed to delete all identities of %s from store after identity change: %v", from, err)
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}
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err = cli.Store.Sessions.DeleteAllSessions(from.User)
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if err != nil {
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cli.Log.Warnf("Failed to delete all sessions of %s from store after identity change: %v", from, err)
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}
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ts := node.AttrGetter().UnixTime("t")
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cli.dispatchEvent(&events.IdentityChange{JID: from, Timestamp: ts})
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} else {
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cli.Log.Debugf("Got unknown encryption notification from server: %s", node.XMLString())
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}
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}
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func (cli *Client) handleAppStateNotification(node *waBinary.Node) {
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for _, collection := range node.GetChildrenByTag("collection") {
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ag := collection.AttrGetter()
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name := appstate.WAPatchName(ag.String("name"))
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version := ag.Uint64("version")
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cli.Log.Debugf("Got server sync notification that app state %s has updated to version %d", name, version)
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err := cli.FetchAppState(name, false, false)
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if errors.Is(err, ErrIQDisconnected) || errors.Is(err, ErrNotConnected) {
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// There are some app state changes right before a remote logout, so stop syncing if we're disconnected.
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cli.Log.Debugf("Failed to sync app state after notification: %v, not trying to sync other states", err)
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return
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} else if err != nil {
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cli.Log.Errorf("Failed to sync app state after notification: %v", err)
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}
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}
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}
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func (cli *Client) handlePictureNotification(node *waBinary.Node) {
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ts := node.AttrGetter().UnixTime("t")
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for _, child := range node.GetChildren() {
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ag := child.AttrGetter()
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var evt events.Picture
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evt.Timestamp = ts
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evt.JID = ag.JID("jid")
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evt.Author = ag.OptionalJIDOrEmpty("author")
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if child.Tag == "delete" {
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evt.Remove = true
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} else if child.Tag == "add" {
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evt.PictureID = ag.String("id")
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} else if child.Tag == "set" {
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// TODO sometimes there's a hash and no ID?
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evt.PictureID = ag.String("id")
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} else {
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continue
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}
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if !ag.OK() {
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cli.Log.Debugf("Ignoring picture change notification with unexpected attributes: %v", ag.Error())
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continue
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}
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cli.dispatchEvent(&evt)
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}
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}
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func (cli *Client) handleDeviceNotification(node *waBinary.Node) {
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cli.userDevicesCacheLock.Lock()
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defer cli.userDevicesCacheLock.Unlock()
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ag := node.AttrGetter()
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from := ag.JID("from")
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cached, ok := cli.userDevicesCache[from]
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if !ok {
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cli.Log.Debugf("No device list cached for %s, ignoring device list notification", from)
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return
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}
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cachedParticipantHash := participantListHashV2(cached)
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for _, child := range node.GetChildren() {
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if child.Tag != "add" && child.Tag != "remove" {
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cli.Log.Debugf("Unknown device list change tag %s", child.Tag)
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continue
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}
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cag := child.AttrGetter()
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deviceHash := cag.String("device_hash")
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deviceChild, _ := child.GetOptionalChildByTag("device")
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changedDeviceJID := deviceChild.AttrGetter().JID("jid")
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switch child.Tag {
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case "add":
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cached = append(cached, changedDeviceJID)
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case "remove":
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for i, jid := range cached {
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if jid == changedDeviceJID {
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cached = append(cached[:i], cached[i+1:]...)
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}
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}
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case "update":
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// ???
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}
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newParticipantHash := participantListHashV2(cached)
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if newParticipantHash == deviceHash {
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cli.Log.Debugf("%s's device list hash changed from %s to %s (%s). New hash matches", from, cachedParticipantHash, deviceHash, child.Tag)
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cli.userDevicesCache[from] = cached
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} else {
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cli.Log.Warnf("%s's device list hash changed from %s to %s (%s). New hash doesn't match (%s)", from, cachedParticipantHash, deviceHash, child.Tag, newParticipantHash)
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delete(cli.userDevicesCache, from)
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}
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}
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}
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func (cli *Client) handleOwnDevicesNotification(node *waBinary.Node) {
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cli.userDevicesCacheLock.Lock()
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defer cli.userDevicesCacheLock.Unlock()
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ownID := cli.getOwnID().ToNonAD()
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if ownID.IsEmpty() {
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cli.Log.Debugf("Ignoring own device change notification, session was deleted")
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return
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}
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cached, ok := cli.userDevicesCache[ownID]
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if !ok {
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cli.Log.Debugf("Ignoring own device change notification, device list not cached")
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return
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}
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oldHash := participantListHashV2(cached)
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expectedNewHash := node.AttrGetter().String("dhash")
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var newDeviceList []types.JID
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for _, child := range node.GetChildren() {
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jid := child.AttrGetter().JID("jid")
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if child.Tag == "device" && !jid.IsEmpty() {
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jid.AD = true
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newDeviceList = append(newDeviceList, jid)
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}
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}
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newHash := participantListHashV2(newDeviceList)
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if newHash != expectedNewHash {
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cli.Log.Debugf("Received own device list change notification %s -> %s, but expected hash was %s", oldHash, newHash, expectedNewHash)
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delete(cli.userDevicesCache, ownID)
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} else {
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cli.Log.Debugf("Received own device list change notification %s -> %s", oldHash, newHash)
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cli.userDevicesCache[ownID] = newDeviceList
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}
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}
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func (cli *Client) handleAccountSyncNotification(node *waBinary.Node) {
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for _, child := range node.GetChildren() {
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switch child.Tag {
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case "privacy":
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cli.handlePrivacySettingsNotification(&child)
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case "devices":
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cli.handleOwnDevicesNotification(&child)
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case "picture":
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cli.dispatchEvent(&events.Picture{
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Timestamp: node.AttrGetter().UnixTime("t"),
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JID: cli.getOwnID().ToNonAD(),
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})
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default:
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cli.Log.Debugf("Unhandled account sync item %s", child.Tag)
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}
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}
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}
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func (cli *Client) handlePrivacyTokenNotification(node *waBinary.Node) {
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ownID := cli.getOwnID().ToNonAD()
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if ownID.IsEmpty() {
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cli.Log.Debugf("Ignoring privacy token notification, session was deleted")
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return
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}
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tokens := node.GetChildByTag("tokens")
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if tokens.Tag != "tokens" {
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cli.Log.Warnf("privacy_token notification didn't contain <tokens> tag")
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return
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}
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parentAG := node.AttrGetter()
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sender := parentAG.JID("from")
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if !parentAG.OK() {
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cli.Log.Warnf("privacy_token notification didn't have a sender (%v)", parentAG.Error())
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return
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}
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for _, child := range tokens.GetChildren() {
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ag := child.AttrGetter()
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if child.Tag != "token" {
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cli.Log.Warnf("privacy_token notification contained unexpected <%s> tag", child.Tag)
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} else if targetUser := ag.JID("jid"); targetUser != ownID {
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cli.Log.Warnf("privacy_token notification contained token for different user %s", targetUser)
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} else if tokenType := ag.String("type"); tokenType != "trusted_contact" {
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cli.Log.Warnf("privacy_token notification contained unexpected token type %s", tokenType)
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} else if token, ok := child.Content.([]byte); !ok {
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cli.Log.Warnf("privacy_token notification contained non-binary token")
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} else {
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timestamp := ag.UnixTime("t")
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if !ag.OK() {
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cli.Log.Warnf("privacy_token notification is missing some fields: %v", ag.Error())
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}
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err := cli.Store.PrivacyTokens.PutPrivacyTokens(store.PrivacyToken{
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User: sender,
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Token: token,
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Timestamp: timestamp,
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})
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if err != nil {
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cli.Log.Errorf("Failed to save privacy token from %s: %v", sender, err)
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} else {
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cli.Log.Debugf("Stored privacy token from %s (ts: %v)", sender, timestamp)
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}
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}
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}
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}
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func (cli *Client) handleNotification(node *waBinary.Node) {
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ag := node.AttrGetter()
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notifType := ag.String("type")
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if !ag.OK() {
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return
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}
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go cli.sendAck(node)
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switch notifType {
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case "encrypt":
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go cli.handleEncryptNotification(node)
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case "server_sync":
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go cli.handleAppStateNotification(node)
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case "account_sync":
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go cli.handleAccountSyncNotification(node)
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case "devices":
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go cli.handleDeviceNotification(node)
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case "w:gp2":
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evt, err := cli.parseGroupNotification(node)
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if err != nil {
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cli.Log.Errorf("Failed to parse group notification: %v", err)
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} else {
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go cli.dispatchEvent(evt)
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}
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case "picture":
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go cli.handlePictureNotification(node)
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case "mediaretry":
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go cli.handleMediaRetryNotification(node)
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case "privacy_token":
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go cli.handlePrivacyTokenNotification(node)
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case "link_code_companion_reg":
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go cli.tryHandleCodePairNotification(node)
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// Other types: business, disappearing_mode, server, status, pay, psa
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default:
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cli.Log.Debugf("Unhandled notification with type %s", notifType)
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}
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}
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