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package bxmpp
import (
"crypto/tls"
"github.com/42wim/matterbridge/bridge"
"github.com/42wim/matterbridge/bridge/config"
"github.com/42wim/matterbridge/bridge/helper"
"github.com/jpillora/backoff"
"github.com/matterbridge/go-xmpp"
"strings"
"time"
)
type Bxmpp struct {
xc *xmpp.Client
xmppMap map[string]string
*bridge.Config
}
func New(cfg *bridge.Config) bridge.Bridger {
b := &Bxmpp{Config: cfg}
b.xmppMap = make(map[string]string)
return b
}
func (b *Bxmpp) Connect() error {
var err error
b.Log.Infof("Connecting %s", b.GetString("Server"))
b.xc, err = b.createXMPP()
if err != nil {
b.Log.Debugf("%#v", err)
return err
}
b.Log.Info("Connection succeeded")
go func() {
initial := true
bf := &backoff.Backoff{
Min: time.Second,
Max: 5 * time.Minute,
Jitter: true,
}
for {
if initial {
b.handleXMPP()
initial = false
}
d := bf.Duration()
b.Log.Infof("Disconnected. Reconnecting in %s", d)
time.Sleep(d)
b.xc, err = b.createXMPP()
if err == nil {
b.Remote <- config.Message{Username: "system", Text: "rejoin", Channel: "", Account: b.Account, Event: config.EVENT_REJOIN_CHANNELS}
b.handleXMPP()
bf.Reset()
}
}
}()
return nil
}
func (b *Bxmpp) Disconnect() error {
return nil
}
func (b *Bxmpp) JoinChannel(channel config.ChannelInfo) error {
b.xc.JoinMUCNoHistory(channel.Name+"@"+b.GetString("Muc"), b.GetString("Nick"))
return nil
}
func (b *Bxmpp) Send(msg config.Message) (string, error) {
// ignore delete messages
if msg.Event == config.EVENT_MSG_DELETE {
return "", nil
}
b.Log.Debugf("=> Receiving %#v", msg)
// Upload a file (in xmpp case send the upload URL because xmpp has no native upload support)
if msg.Extra != nil {
for _, rmsg := range helper.HandleExtra(&msg, b.General) {
b.xc.Send(xmpp.Chat{Type: "groupchat", Remote: rmsg.Channel + "@" + b.GetString("Muc"), Text: rmsg.Username + rmsg.Text})
}
if len(msg.Extra["file"]) > 0 {
return b.handleUploadFile(&msg)
}
}
// Post normal message
_, err := b.xc.Send(xmpp.Chat{Type: "groupchat", Remote: msg.Channel + "@" + b.GetString("Muc"), Text: msg.Username + msg.Text})
if err != nil {
return "", err
}
return "", nil
}
func (b *Bxmpp) createXMPP() (*xmpp.Client, error) {
tc := new(tls.Config)
tc.InsecureSkipVerify = b.GetBool("SkipTLSVerify")
tc.ServerName = strings.Split(b.GetString("Server"), ":")[0]
options := xmpp.Options{
Host: b.GetString("Server"),
User: b.GetString("Jid"),
Password: b.GetString("Password"),
NoTLS: true,
StartTLS: true,
TLSConfig: tc,
Debug: b.GetBool("debug"),
Logger: b.Log.Writer(),
Session: true,
Status: "",
StatusMessage: "",
Resource: "",
InsecureAllowUnencryptedAuth: false,
}
var err error
b.xc, err = options.NewClient()
return b.xc, err
}
func (b *Bxmpp) xmppKeepAlive() chan bool {
done := make(chan bool)
go func() {
ticker := time.NewTicker(90 * time.Second)
defer ticker.Stop()
for {
select {
case <-ticker.C:
b.Log.Debugf("PING")
err := b.xc.PingC2S("", "")
if err != nil {
b.Log.Debugf("PING failed %#v", err)
}
case <-done:
return
}
}
}()
return done
}
func (b *Bxmpp) handleXMPP() error {
var ok bool
done := b.xmppKeepAlive()
defer close(done)
for {
m, err := b.xc.Recv()
if err != nil {
return err
}
switch v := m.(type) {
case xmpp.Chat:
if v.Type == "groupchat" {
b.Log.Debugf("== Receiving %#v", v)
// skip invalid messages
if b.skipMessage(v) {
continue
}
rmsg := config.Message{Username: b.parseNick(v.Remote), Text: v.Text, Channel: b.parseChannel(v.Remote), Account: b.Account, UserID: v.Remote}
// check if we have an action event
rmsg.Text, ok = b.replaceAction(rmsg.Text)
if ok {
rmsg.Event = config.EVENT_USER_ACTION
}
b.Log.Debugf("<= Sending message from %s on %s to gateway", rmsg.Username, b.Account)
b.Log.Debugf("<= Message is %#v", rmsg)
b.Remote <- rmsg
}
case xmpp.Presence:
// do nothing
}
}
}
func (b *Bxmpp) replaceAction(text string) (string, bool) {
if strings.HasPrefix(text, "/me ") {
return strings.Replace(text, "/me ", "", -1), true
}
return text, false
}
// handleUploadFile handles native upload of files
func (b *Bxmpp) handleUploadFile(msg *config.Message) (string, error) {
for _, f := range msg.Extra["file"] {
fi := f.(config.FileInfo)
if fi.Comment != "" {
msg.Text += fi.Comment + ": "
}
if fi.URL != "" {
msg.Text += fi.URL
}
_, err := b.xc.Send(xmpp.Chat{Type: "groupchat", Remote: msg.Channel + "@" + b.GetString("Muc"), Text: msg.Username + msg.Text})
if err != nil {
return "", err
}
}
return "", nil
}
func (b *Bxmpp) parseNick(remote string) string {
s := strings.Split(remote, "@")
if len(s) > 0 {
s = strings.Split(s[1], "/")
if len(s) == 2 {
return s[1] // nick
}
}
return ""
}
func (b *Bxmpp) parseChannel(remote string) string {
s := strings.Split(remote, "@")
if len(s) >= 2 {
return s[0] // channel
}
return ""
}
// skipMessage skips messages that need to be skipped
func (b *Bxmpp) skipMessage(message xmpp.Chat) bool {
// skip messages from ourselves
if b.parseNick(message.Remote) == b.GetString("Nick") {
return true
}
// skip empty messages
if message.Text == "" {
return true
}
// skip subject messages
if strings.Contains(message.Text, "</subject>") {
return true
}
// skip delayed messages
t := time.Time{}
return message.Stamp != t
}
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