telegabber/xmpp/handlers.go

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package xmpp
import (
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"bytes"
"encoding/base64"
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"encoding/xml"
"github.com/pkg/errors"
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"io"
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"strconv"
"strings"
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"dev.narayana.im/narayana/telegabber/persistence"
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"dev.narayana.im/narayana/telegabber/xmpp/extensions"
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"dev.narayana.im/narayana/telegabber/xmpp/gateway"
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log "github.com/sirupsen/logrus"
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"gosrc.io/xmpp"
"gosrc.io/xmpp/stanza"
)
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const (
TypeVCardTemp byte = iota
TypeVCard4
)
const NodeVCard4 string = "urn:xmpp:vcard4"
func logPacketType(p stanza.Packet) {
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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
}
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log.Debugf("%#v", iq)
if iq.Type == "get" {
_, ok := iq.Payload.(*extensions.IqVcardTemp)
if ok {
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go handleGetVcardIq(s, iq, TypeVCardTemp)
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return
}
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pubsub, ok := iq.Payload.(*stanza.PubSubGeneric)
if ok {
if pubsub.Items != nil && pubsub.Items.Node == NodeVCard4 {
go handleGetVcardIq(s, iq, TypeVCard4)
return
}
}
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_, ok = iq.Payload.(*stanza.DiscoInfo)
if ok {
go handleGetDiscoInfo(s, iq)
return
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}
}
}
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// HandleMessage processes an incoming XMPP message
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func HandleMessage(s xmpp.Sender, p stanza.Packet) {
msg, ok := p.(stanza.Message)
if !ok {
logPacketType(p)
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return
}
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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 := splitFrom(msg.From)
if !ok {
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return
}
gatewayJid := gateway.Jid.Bare()
session, ok := sessions[bare]
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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
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}
toID, ok := toToID(msg.To)
if ok {
session.ProcessOutgoingMessage(toID, msg.Body, msg.From)
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)
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if response != "" {
gateway.SendMessage(msg.From, "", response, component)
}
return
}
}
log.Warn("Unknown purpose of the message, skipping")
}
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}
// 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)
}
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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 := splitFrom(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"
}
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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 := splitFrom(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) {
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sessionLock.Lock()
delete(sessions, bare)
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sessionLock.Unlock()
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}
// 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"))
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} else {
for status := range session.StatusesRange() {
go session.ProcessStatusUpdate(
status.ID,
status.Description,
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status.XMPP,
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gateway.SPImmed(false),
)
}
}
}()
}
}
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func handleGetVcardIq(s xmpp.Sender, iq *stanza.IQ, typ byte) {
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log.WithFields(log.Fields{
"from": iq.From,
"to": iq.To,
}).Warn("VCard request")
fromJid, err := stanza.NewJid(iq.From)
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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
}
chat, user, err := session.GetContactByID(toID, nil)
if err != nil {
log.Error(err)
return
}
var fn, photo, nickname, given, family, tel, info string
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if chat != nil {
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fn = chat.Title
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if chat.Photo != nil {
file, path, err := session.OpenPhotoFile(chat.Photo.Small, 32)
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if err == nil {
defer file.Close()
buf := new(bytes.Buffer)
binval := base64.NewEncoder(base64.StdEncoding, buf)
_, err = io.Copy(binval, file)
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binval.Close()
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if err == nil {
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photo = buf.String()
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} else {
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log.Errorf("Error calculating base64: %v", path)
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}
} else if path != "" {
log.Errorf("Photo does not exist: %v", path)
} else {
log.Errorf("PHOTO: %#v", err.Error())
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}
}
info = session.GetChatDescription(chat)
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}
if user != nil {
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nickname = user.Username
given = user.FirstName
family = user.LastName
tel = user.PhoneNumber
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}
answer := stanza.IQ{
Attrs: stanza.Attrs{
From: iq.To,
To: iq.From,
Id: iq.Id,
Type: "result",
},
Payload: makeVCardPayload(typ, iq.To, fn, photo, nickname, given, family, tel, info),
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}
log.Debugf("%#v", answer)
component, ok := s.(*xmpp.Component)
if !ok {
log.Error("Not a component")
return
}
_ = gateway.ResumableSend(component, &answer)
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}
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func handleGetDiscoInfo(s xmpp.Sender, iq *stanza.IQ) {
answer, err := stanza.NewIQ(stanza.Attrs{
Type: stanza.IQTypeResult,
From: iq.To,
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To: iq.From,
Id: iq.Id,
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Lang: "en",
})
if err != nil {
log.Errorf("Failed to create answer IQ: %v", err)
return
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}
disco := answer.DiscoInfo()
_, ok := toToID(iq.To)
if ok {
disco.AddIdentity("", "account", "registered")
} else {
disco.AddIdentity("Telegram Gateway", "gateway", "telegram")
}
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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 splitFrom(from string) (string, string, bool) {
fromJid, err := stanza.NewJid(from)
if err != nil {
log.WithFields(log.Fields{
"from": from,
}).Error(errors.Wrap(err, "Invalid from JID!"))
return "", "", false
}
return fromJid.Bare(), fromJid.Resource, true
}
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
}
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func makeVCardPayload(typ byte, id, fn, photo, nickname, given, family, tel, info string) stanza.IQPayload {
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if typ == TypeVCardTemp {
vcard := &extensions.IqVcardTemp{}
vcard.Fn.Text = fn
if photo != "" {
vcard.Photo.Type.Text = "image/jpeg"
vcard.Photo.Binval.Text = photo
}
vcard.Nickname.Text = nickname
vcard.N.Given.Text = given
vcard.N.Family.Text = family
vcard.Tel.Number.Text = tel
vcard.Desc.Text = info
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return vcard
} else if typ == TypeVCard4 {
nodes := []stanza.Node{}
if fn != "" {
nodes = append(nodes, stanza.Node{
XMLName: xml.Name{Local: "fn"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "text"},
Content: fn,
},
},
})
}
if photo != "" {
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," + photo,
},
},
})
}
if nickname != "" {
nodes = append(nodes, stanza.Node{
XMLName: xml.Name{Local: "nickname"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "text"},
Content: nickname,
},
},
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}, stanza.Node{
XMLName: xml.Name{Local: "impp"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "uri"},
Content: "https://t.me/" + nickname,
},
},
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})
}
if family != "" || given != "" {
nodes = append(nodes, stanza.Node{
XMLName: xml.Name{Local: "n"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "surname"},
Content: family,
},
stanza.Node{
XMLName: xml.Name{Local: "given"},
Content: given,
},
},
})
}
if tel != "" {
nodes = append(nodes, stanza.Node{
XMLName: xml.Name{Local: "tel"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "uri"},
Content: "tel:" + tel,
},
},
})
}
if info != "" {
nodes = append(nodes, stanza.Node{
XMLName: xml.Name{Local: "note"},
Nodes: []stanza.Node{
stanza.Node{
XMLName: xml.Name{Local: "text"},
Content: info,
},
},
})
}
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pubsub := &stanza.PubSubGeneric{
Items: &stanza.Items{
Node: NodeVCard4,
List: []stanza.Item{
stanza.Item{
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Id: id,
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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
}