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package bsshchat
import (
"bufio"
"io"
"strings"
"github.com/42wim/matterbridge/bridge"
"github.com/42wim/matterbridge/bridge/config"
"github.com/42wim/matterbridge/bridge/helper"
"github.com/shazow/ssh-chat/sshd"
log "github.com/sirupsen/logrus"
)
type Bsshchat struct {
r *bufio.Scanner
w io.WriteCloser
*bridge.Config
}
func New(cfg *bridge.Config) bridge.Bridger {
return &Bsshchat{Config: cfg}
}
func (b *Bsshchat) Connect() error {
b.Log.Infof("Connecting %s", b.GetString("Server"))
// connHandler will be called by 'sshd.ConnectShell()' below
// once the connection is established in order to handle it.
connErr := make(chan error, 1) // Needs to be buffered.
connSignal := make(chan struct{})
connHandler := func(r io.Reader, w io.WriteCloser) error {
b.r = bufio.NewScanner(r)
b.r.Scan()
b.w = w
if _, err := b.w.Write([]byte("/theme mono\r\n")); err != nil {
return err
}
close(connSignal) // Connection is established so we can signal the success.
return b.handleSSHChat()
}
go func() {
// As a successful connection will result in this returning after the Connection
// method has already returned point we NEED to have a buffered channel to still
// be able to write.
connErr <- sshd.ConnectShell(b.GetString("Server"), b.GetString("Nick"), connHandler)
}()
select {
case err := <-connErr:
b.Log.Error("Connection failed")
return err
case <-connSignal:
}
b.Log.Info("Connection succeeded")
return nil
}
func (b *Bsshchat) Disconnect() error {
return nil
}
func (b *Bsshchat) JoinChannel(channel config.ChannelInfo) error {
return nil
}
func (b *Bsshchat) Send(msg config.Message) (string, error) {
// ignore delete messages
if msg.Event == config.EventMsgDelete {
return "", nil
}
b.Log.Debugf("=> Receiving %#v", msg)
if msg.Extra != nil {
for _, rmsg := range helper.HandleExtra(&msg, b.General) {
if _, err := b.w.Write([]byte(rmsg.Username + rmsg.Text + "\r\n")); err != nil {
b.Log.Errorf("Could not send extra message: %#v", err)
}
}
if len(msg.Extra["file"]) > 0 {
return b.handleUploadFile(&msg)
}
}
_, err := b.w.Write([]byte(msg.Username + msg.Text + "\r\n"))
return "", err
}
/*
func (b *Bsshchat) sshchatKeepAlive() 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 stripPrompt(s string) string {
pos := strings.LastIndex(s, "\033[K")
if pos < 0 {
return s
}
return s[pos+3:]
}
func (b *Bsshchat) handleSSHChat() error {
/*
done := b.sshchatKeepAlive()
defer close(done)
*/
wait := true
for {
if b.r.Scan() {
// ignore messages from ourselves
if !strings.Contains(b.r.Text(), "\033[K") {
continue
}
res := strings.Split(stripPrompt(b.r.Text()), ":")
if res[0] == "-> Set theme" {
wait = false
log.Debugf("mono found, allowing")
continue
}
if !wait {
b.Log.Debugf("<= Message %#v", res)
rmsg := config.Message{Username: res[0], Text: strings.Join(res[1:], ":"), Channel: "sshchat", Account: b.Account, UserID: "nick"}
b.Remote <- rmsg
}
}
}
}
func (b *Bsshchat) 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
if fi.Comment != "" {
msg.Text = fi.Comment + ": " + fi.URL
}
}
if _, err := b.w.Write([]byte(msg.Username + msg.Text)); err != nil {
b.Log.Errorf("Could not send file message: %#v", err)
}
}
return "", nil
}
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