package xmpp
import (
"bytes"
"encoding/base64"
"encoding/xml"
"github.com/pkg/errors"
"io"
"strconv"
"strings"
"dev.narayana.im/narayana/telegabber/persistence"
"dev.narayana.im/narayana/telegabber/telegram"
"dev.narayana.im/narayana/telegabber/xmpp/extensions"
"dev.narayana.im/narayana/telegabber/xmpp/gateway"
log "github.com/sirupsen/logrus"
"gosrc.io/xmpp"
"gosrc.io/xmpp/stanza"
)
const (
TypeVCardTemp byte = iota
TypeVCard4
)
const NodeVCard4 string = "urn:xmpp:vcard4"
func logPacketType(p stanza.Packet) {
log.Warnf("Ignoring packet: %T\n", p)
}
// HandleIq processes an incoming XMPP iq
func HandleIq(s xmpp.Sender, p stanza.Packet) {
iq, ok := p.(*stanza.IQ)
if !ok {
logPacketType(p)
return
}
log.Debugf("%#v", iq)
if iq.Type == "get" {
_, ok := iq.Payload.(*extensions.IqVcardTemp)
if ok {
go handleGetVcardIq(s, iq, TypeVCardTemp)
return
}
pubsub, ok := iq.Payload.(*stanza.PubSubGeneric)
if ok {
if pubsub.Items != nil && pubsub.Items.Node == NodeVCard4 {
go handleGetVcardIq(s, iq, TypeVCard4)
return
}
}
_, ok = iq.Payload.(*stanza.DiscoInfo)
if ok {
go handleGetDiscoInfo(s, iq)
return
}
}
}
// HandleMessage processes an incoming XMPP message
func HandleMessage(s xmpp.Sender, p stanza.Packet) {
msg, ok := p.(stanza.Message)
if !ok {
logPacketType(p)
return
}
component, ok := s.(*xmpp.Component)
if !ok {
log.Error("Not a component")
return
}
if msg.Type != "error" && msg.Body != "" {
log.WithFields(log.Fields{
"from": msg.From,
"to": msg.To,
}).Warn("Message")
log.Debugf("%#v", msg)
bare, resource, ok := gateway.SplitJID(msg.From)
if !ok {
return
}
gatewayJid := gateway.Jid.Bare()
session, ok := sessions[bare]
if !ok {
if msg.To == gatewayJid {
gateway.SendPresence(component, msg.From, gateway.SPType("subscribe"))
gateway.SendPresence(component, msg.From, gateway.SPType("subscribed"))
} else {
log.Error("Message from stranger")
}
return
}
toID, ok := toToID(msg.To)
if ok {
var reply extensions.Reply
var fallback extensions.Fallback
var replace extensions.Replace
msg.Get(&reply)
msg.Get(&fallback)
msg.Get(&replace)
log.Debugf("reply: %#v", reply)
log.Debugf("fallback: %#v", fallback)
log.Debugf("replace: %#v", replace)
var replyId int64
var err error
text := msg.Body
if len(reply.Id) > 0 {
id := reply.Id
if id[0] == 'e' {
id = id[1:]
}
replyId, err = strconv.ParseInt(id, 10, 64)
if err != nil {
log.Warn(errors.Wrap(err, "Failed to parse message ID!"))
}
if replyId != 0 && fallback.For == "urn:xmpp:reply:0" && len(fallback.Body) > 0 {
body := fallback.Body[0]
var start, end int64
start, err = strconv.ParseInt(body.Start, 10, 64)
if err != nil {
log.WithFields(log.Fields{
"start": body.Start,
}).Warn(errors.Wrap(err, "Failed to parse fallback start!"))
}
end, err = strconv.ParseInt(body.End, 10, 64)
if err != nil {
log.WithFields(log.Fields{
"end": body.End,
}).Warn(errors.Wrap(err, "Failed to parse fallback end!"))
}
text = text[:start] + text[end:]
}
}
var replaceId int64
if replace.Id != "" {
chatId, msgId, err := gateway.IdsDB.GetByXmppId(session.Session.Login, bare, replace.Id)
if err == nil {
if chatId != toID {
gateway.SendTextMessage(msg.From, strconv.FormatInt(toID, 10), "<ERROR: Chat mismatch>", component)
return
}
replaceId = msgId
log.Debugf("replace tg: %#v %#v", chatId, msgId)
} else {
gateway.SendTextMessage(msg.From, strconv.FormatInt(toID, 10), "<ERROR: Could not find matching message to edit>", component)
return
}
}
tgMessageId := session.ProcessOutgoingMessage(toID, text, msg.From, replyId, replaceId)
if tgMessageId != 0 {
if replaceId != 0 {
// not needed (is it persistent among clients though?)
/* err = gateway.IdsDB.ReplaceIdPair(session.Session.Login, bare, replace.Id, msg.Id, tgMessageId)
if err != nil {
log.Errorf("Failed to replace id %v with %v %v", replace.Id, msg.Id, tgMessageId)
} */
} else {
err = gateway.IdsDB.Set(session.Session.Login, bare, toID, tgMessageId, msg.Id)
if err != nil {
log.Errorf("Failed to save ids %v/%v %v", toID, tgMessageId, msg.Id)
}
}
} else {
/*
// if a message failed to edit on Telegram side, match new XMPP ID with old Telegram ID anyway
if replaceId != 0 {
err = gateway.IdsDB.ReplaceXmppId(session.Session.Login, bare, replace.Id, msg.Id)
if err != nil {
log.Errorf("Failed to replace id %v with %v", replace.Id, msg.Id)
}
} */
}
return
} else {
toJid, err := stanza.NewJid(msg.To)
if err == nil && toJid.Bare() == gatewayJid && (strings.HasPrefix(msg.Body, "/") || strings.HasPrefix(msg.Body, "!")) {
response := session.ProcessTransportCommand(msg.Body, resource)
if response != "" {
gateway.SendServiceMessage(msg.From, response, component)
}
return
}
}
log.Warn("Unknown purpose of the message, skipping")
}
if msg.Body == "" {
var privilege extensions.ComponentPrivilege
if ok := msg.Get(&privilege); ok {
log.Debugf("privilege: %#v", privilege)
}
for _, perm := range privilege.Perms {
if perm.Access == "message" && perm.Type == "outgoing" {
gateway.MessageOutgoingPermission = true
}
}
}
if msg.Type == "error" {
log.Errorf("MESSAGE ERROR: %#v", p)
if msg.XMLName.Space == "jabber:component:accept" && msg.Error.Code == 401 {
suffix := "@" + msg.From
for bare := range sessions {
if strings.HasSuffix(bare, suffix) {
gateway.SendServiceMessage(bare, "Your server \"" + msg.From + "\" does not allow to send carbons", component)
}
}
}
}
}
// HandlePresence processes an incoming XMPP presence
func HandlePresence(s xmpp.Sender, p stanza.Packet) {
prs, ok := p.(stanza.Presence)
if !ok {
logPacketType(p)
return
}
if prs.Type == "subscribe" {
handleSubscription(s, prs)
}
if prs.To == gateway.Jid.Bare() {
handlePresence(s, prs)
}
}
func handleSubscription(s xmpp.Sender, p stanza.Presence) {
log.WithFields(log.Fields{
"from": p.From,
"to": p.To,
}).Warn("Subscription request")
log.Debugf("%#v", p)
reply := stanza.Presence{Attrs: stanza.Attrs{
From: p.To,
To: p.From,
Id: p.Id,
Type: "subscribed",
}}
component, ok := s.(*xmpp.Component)
if !ok {
log.Error("Not a component")
return
}
_ = gateway.ResumableSend(component, reply)
toID, ok := toToID(p.To)
if !ok {
return
}
bare, _, ok := gateway.SplitJID(p.From)
if !ok {
return
}
session, ok := getTelegramInstance(bare, &persistence.Session{}, component)
if !ok {
return
}
go session.ProcessStatusUpdate(toID, "", "", gateway.SPImmed(false))
}
func handlePresence(s xmpp.Sender, p stanza.Presence) {
presenceType := p.Type
if presenceType == "" {
presenceType = "online"
}
component, ok := s.(*xmpp.Component)
if !ok {
log.Error("Not a component")
return
}
log.WithFields(log.Fields{
"type": presenceType,
"from": p.From,
"to": p.To,
}).Warn("Presence")
log.Debugf("%#v", p)
// create session
bare, resource, ok := gateway.SplitJID(p.From)
if !ok {
return
}
session, ok := getTelegramInstance(bare, &persistence.Session{}, component)
if !ok {
return
}
switch p.Type {
// destroy session
case "unsubscribed", "unsubscribe":
if session.Disconnect(resource, false) {
sessionLock.Lock()
delete(sessions, bare)
sessionLock.Unlock()
}
// go offline
case "unavailable", "error":
session.Disconnect(resource, false)
// go online
case "probe", "", "online", "subscribe":
// due to the weird implementation of go-tdlib wrapper, it won't
// return the client instance until successful authorization
go func() {
err := session.Connect(resource)
if err != nil {
log.Error(errors.Wrap(err, "TDlib connection failure"))
} else {
for status := range session.StatusesRange() {
go session.ProcessStatusUpdate(
status.ID,
status.Description,
status.XMPP,
gateway.SPImmed(false),
)
}
}
}()
}
}
func handleGetVcardIq(s xmpp.Sender, iq *stanza.IQ, typ byte) {
log.WithFields(log.Fields{
"from": iq.From,
"to": iq.To,
}).Warn("VCard request")
fromJid, err := stanza.NewJid(iq.From)
if err != nil {
log.Error("Invalid from JID!")
return
}
session, ok := sessions[fromJid.Bare()]
if !ok {
log.Error("IQ from stranger")
return
}
toParts := strings.Split(iq.To, "@")
toID, err := strconv.ParseInt(toParts[0], 10, 64)
if err != nil {
log.Error("Invalid IQ to")
return
}
info, err := session.GetVcardInfo(toID)
if err != nil {
log.Error(err)
return
}
answer := stanza.IQ{
Attrs: stanza.Attrs{
From: iq.To,
To: iq.From,
Id: iq.Id,
Type: "result",
},
Payload: makeVCardPayload(typ, iq.To, info, session),
}
log.Debugf("%#v", answer)
component, ok := s.(*xmpp.Component)
if !ok {
log.Error("Not a component")
return
}
_ = gateway.ResumableSend(component, &answer)
}
func handleGetDiscoInfo(s xmpp.Sender, iq *stanza.IQ) {
answer, err := stanza.NewIQ(stanza.Attrs{
Type: stanza.IQTypeResult,
From: iq.To,
To: iq.From,
Id: iq.Id,
Lang: "en",
})
if err != nil {
log.Errorf("Failed to create answer IQ: %v", err)
return
}
disco := answer.DiscoInfo()
_, ok := toToID(iq.To)
if ok {
disco.AddIdentity("", "account", "registered")
} else {
disco.AddIdentity("Telegram Gateway", "gateway", "telegram")
}
answer.Payload = disco
log.Debugf("%#v", answer)
component, ok := s.(*xmpp.Component)
if !ok {
log.Error("Not a component")
return
}
_ = gateway.ResumableSend(component, answer)
}
func toToID(to string) (int64, bool) {
toParts := strings.Split(to, "@")
if len(toParts) < 2 {
return 0, false
}
toID, err := strconv.ParseInt(toParts[0], 10, 64)
if err != nil {
log.WithFields(log.Fields{
"to": to,
}).Error(errors.Wrap(err, "Invalid to JID!"))
return 0, false
}
return toID, true
}
func makeVCardPayload(typ byte, id string, info telegram.VCardInfo, session *telegram.Client) stanza.IQPayload {
var base64Photo string
if info.Photo != nil {
file, path, err := session.ForceOpenFile(info.Photo, 32)
if err == nil {
defer file.Close()
buf := new(bytes.Buffer)
binval := base64.NewEncoder(base64.StdEncoding, buf)
_, err = io.Copy(binval, file)
binval.Close()
if err == nil {
base64Photo = buf.String()
} else {
log.Errorf("Error calculating base64: %v", path)
}
} else if path != "" {
log.Errorf("Photo does not exist: %v", path)
} else {
log.Errorf("PHOTO: %#v", err.Error())
}
}
if typ == TypeVCardTemp {
vcard := &extensions.IqVcardTemp{}
vcard.Fn.Text = info.Fn
if base64Photo != "" {
vcard.Photo.Type.Text = "image/jpeg"
vcard.Photo.Binval.Text = base64Photo
}
vcard.Nickname.Text = info.Nickname
vcard.N.Given.Text = info.Given
vcard.N.Family.Text = info.Family
vcard.Tel.Number.Text = info.Tel
vcard.Desc.Text = info.Info
return vcard
} else if typ == TypeVCard4 {
nodes := []stanza.Node{}
if info.Fn != "" {
nodes = append(nodes, stanza.Node{
XMLName: xml.Name{Local: "fn"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "text"},
Content: info.Fn,
},
},
})
}
if base64Photo != "" {
nodes = append(nodes, stanza.Node{
XMLName: xml.Name{Local: "photo"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "uri"},
Content: "data:image/jpeg;base64," + base64Photo,
},
},
})
}
if info.Nickname != "" {
nodes = append(nodes, stanza.Node{
XMLName: xml.Name{Local: "nickname"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "text"},
Content: info.Nickname,
},
},
}, stanza.Node{
XMLName: xml.Name{Local: "impp"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "uri"},
Content: "https://t.me/" + info.Nickname,
},
},
})
}
if info.Family != "" || info.Given != "" {
nodes = append(nodes, stanza.Node{
XMLName: xml.Name{Local: "n"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "surname"},
Content: info.Family,
},
stanza.Node{
XMLName: xml.Name{Local: "given"},
Content: info.Given,
},
},
})
}
if info.Tel != "" {
nodes = append(nodes, stanza.Node{
XMLName: xml.Name{Local: "tel"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "uri"},
Content: "tel:" + info.Tel,
},
},
})
}
if info.Info != "" {
nodes = append(nodes, stanza.Node{
XMLName: xml.Name{Local: "note"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "text"},
Content: info.Info,
},
},
})
}
pubsub := &stanza.PubSubGeneric{
Items: &stanza.Items{
Node: NodeVCard4,
List: []stanza.Item{
stanza.Item{
Id: id,
Any: &stanza.Node{
XMLName: xml.Name{Local: "vcard"},
Attrs: []xml.Attr{
xml.Attr{
Name: xml.Name{Local: "xmlns"},
Value: "urn:ietf:params:xml:ns:vcard-4.0",
},
},
Nodes: nodes,
},
},
},
},
}
return pubsub
}
return nil
}
