bridge/irc/handlers.go
package birc
import (
"bytes"
"fmt"
"io/ioutil"
"strconv"
"strings"
"time"
"github.com/42wim/matterbridge/bridge/config"
"github.com/42wim/matterbridge/bridge/helper"
"github.com/lrstanley/girc"
"github.com/paulrosania/go-charset/charset"
"github.com/saintfish/chardet"
// We need to import the 'data' package as an implicit dependency.
// See: https://godoc.org/github.com/paulrosania/go-charset/charset
_ "github.com/paulrosania/go-charset/data"
)
func (b *Birc) handleCharset(msg *config.Message) error {
if b.GetString("Charset") != "" {
switch b.GetString("Charset") {
case "gbk", "gb18030", "gb2312", "big5", "euc-kr", "euc-jp", "shift-jis", "iso-2022-jp":
msg.Text = toUTF8(b.GetString("Charset"), msg.Text)
default:
buf := new(bytes.Buffer)
w, err := charset.NewWriter(b.GetString("Charset"), buf)
if err != nil {
b.Log.Errorf("charset to utf-8 conversion failed: %s", err)
return err
}
fmt.Fprint(w, msg.Text)
w.Close()
msg.Text = buf.String()
}
}
return nil
}
// handleFiles returns true if we have handled the files, otherwise return false
func (b *Birc) handleFiles(msg *config.Message) bool {
if msg.Extra == nil {
return false
}
for _, rmsg := range helper.HandleExtra(msg, b.General) {
b.Local <- rmsg
}
if len(msg.Extra["file"]) == 0 {
return false
}
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
}
}
b.Local <- config.Message{Text: msg.Text, Username: msg.Username, Channel: msg.Channel, Event: msg.Event}
}
return true
}
func (b *Birc) handleInvite(client *girc.Client, event girc.Event) {
if len(event.Params) != 2 {
return
}
channel := event.Params[1]
b.Log.Debugf("got invite for %s", channel)
if _, ok := b.channels[channel]; ok {
b.i.Cmd.Join(channel)
}
}
func (b *Birc) handleJoinPart(client *girc.Client, event girc.Event) {
if len(event.Params) == 0 {
b.Log.Debugf("handleJoinPart: empty Params? %#v", event)
return
}
channel := strings.ToLower(event.Params[0])
if event.Command == "KICK" && event.Params[1] == b.Nick {
b.Log.Infof("Got kicked from %s by %s", channel, event.Source.Name)
time.Sleep(time.Duration(b.GetInt("RejoinDelay")) * time.Second)
b.Remote <- config.Message{Username: "system", Text: "rejoin", Channel: channel, Account: b.Account, Event: config.EventRejoinChannels}
return
}
if event.Command == "QUIT" {
if event.Source.Name == b.Nick && strings.Contains(event.Last(), "Ping timeout") {
b.Log.Infof("%s reconnecting ..", b.Account)
b.Remote <- config.Message{Username: "system", Text: "reconnect", Channel: channel, Account: b.Account, Event: config.EventFailure}
return
}
}
if event.Source.Name != b.Nick {
if b.GetBool("nosendjoinpart") {
return
}
msg := config.Message{Username: "system", Text: event.Source.Name + " " + strings.ToLower(event.Command) + "s", Channel: channel, Account: b.Account, Event: config.EventJoinLeave}
if b.GetBool("verbosejoinpart") {
b.Log.Debugf("<= Sending verbose JOIN_LEAVE event from %s to gateway", b.Account)
msg = config.Message{Username: "system", Text: event.Source.Name + " (" + event.Source.Ident + "@" + event.Source.Host + ") " + strings.ToLower(event.Command) + "s", Channel: channel, Account: b.Account, Event: config.EventJoinLeave}
} else {
b.Log.Debugf("<= Sending JOIN_LEAVE event from %s to gateway", b.Account)
}
b.Log.Debugf("<= Message is %#v", msg)
b.Remote <- msg
return
}
b.Log.Debugf("handle %#v", event)
}
func (b *Birc) handleNewConnection(client *girc.Client, event girc.Event) {
b.Log.Debug("Registering callbacks")
i := b.i
b.Nick = event.Params[0]
b.Log.Debug("Clearing handlers before adding in case of BNC reconnect")
i.Handlers.Clear("PRIVMSG")
i.Handlers.Clear("CTCP_ACTION")
i.Handlers.Clear(girc.RPL_TOPICWHOTIME)
i.Handlers.Clear(girc.NOTICE)
i.Handlers.Clear("JOIN")
i.Handlers.Clear("PART")
i.Handlers.Clear("QUIT")
i.Handlers.Clear("KICK")
i.Handlers.Clear("INVITE")
i.Handlers.AddBg("PRIVMSG", b.handlePrivMsg)
i.Handlers.Add(girc.RPL_TOPICWHOTIME, b.handleTopicWhoTime)
i.Handlers.AddBg(girc.NOTICE, b.handleNotice)
i.Handlers.AddBg("JOIN", b.handleJoinPart)
i.Handlers.AddBg("PART", b.handleJoinPart)
i.Handlers.AddBg("QUIT", b.handleJoinPart)
i.Handlers.AddBg("KICK", b.handleJoinPart)
i.Handlers.Add("INVITE", b.handleInvite)
}
func (b *Birc) handleNickServ() {
if !b.GetBool("UseSASL") && b.GetString("NickServNick") != "" && b.GetString("NickServPassword") != "" {
b.Log.Debugf("Sending identify to nickserv %s", b.GetString("NickServNick"))
b.i.Cmd.Message(b.GetString("NickServNick"), "IDENTIFY "+b.GetString("NickServPassword"))
}
if strings.EqualFold(b.GetString("NickServNick"), "Q@CServe.quakenet.org") {
b.Log.Debugf("Authenticating %s against %s", b.GetString("NickServUsername"), b.GetString("NickServNick"))
b.i.Cmd.Message(b.GetString("NickServNick"), "AUTH "+b.GetString("NickServUsername")+" "+b.GetString("NickServPassword"))
}
// give nickserv some slack
time.Sleep(time.Second * 5)
b.authDone = true
}
func (b *Birc) handleNotice(client *girc.Client, event girc.Event) {
if strings.Contains(event.String(), "This nickname is registered") && event.Source.Name == b.GetString("NickServNick") {
b.handleNickServ()
} else {
b.handlePrivMsg(client, event)
}
}
func (b *Birc) handleOther(client *girc.Client, event girc.Event) {
if b.GetInt("DebugLevel") == 1 {
if event.Command != "CLIENT_STATE_UPDATED" &&
event.Command != "CLIENT_GENERAL_UPDATED" {
b.Log.Debugf("%#v", event.String())
}
return
}
switch event.Command {
case "372", "375", "376", "250", "251", "252", "253", "254", "255", "265", "266", "002", "003", "004", "005":
return
}
b.Log.Debugf("%#v", event.String())
}
func (b *Birc) handleOtherAuth(client *girc.Client, event girc.Event) {
b.handleNickServ()
b.handleRunCommands()
// we are now fully connected
// only send on first connection
if b.FirstConnection {
b.connected <- nil
}
}
func (b *Birc) handlePrivMsg(client *girc.Client, event girc.Event) {
if b.skipPrivMsg(event) {
return
}
rmsg := config.Message{
Username: event.Source.Name,
Channel: strings.ToLower(event.Params[0]),
Account: b.Account,
UserID: event.Source.Ident + "@" + event.Source.Host,
}
b.Log.Debugf("== Receiving PRIVMSG: %s %s %#v", event.Source.Name, event.Last(), event)
// set action event
if ok, ctcp := event.IsCTCP(); ok {
if ctcp.Command != girc.CTCP_ACTION {
b.Log.Debugf("dropping user ctcp, command: %s", ctcp.Command)
return
}
rmsg.Event = config.EventUserAction
}
// set NOTICE event
if event.Command == "NOTICE" {
rmsg.Event = config.EventNoticeIRC
}
// strip action, we made an event if it was an action
rmsg.Text += event.StripAction()
// start detecting the charset
mycharset := b.GetString("Charset")
if mycharset == "" {
// detect what were sending so that we convert it to utf-8
detector := chardet.NewTextDetector()
result, err := detector.DetectBest([]byte(rmsg.Text))
if err != nil {
b.Log.Infof("detection failed for rmsg.Text: %#v", rmsg.Text)
return
}
b.Log.Debugf("detected %s confidence %#v", result.Charset, result.Confidence)
mycharset = result.Charset
// if we're not sure, just pick ISO-8859-1
if result.Confidence < 80 {
mycharset = "ISO-8859-1"
}
}
switch mycharset {
case "gbk", "gb18030", "gb2312", "big5", "euc-kr", "euc-jp", "shift-jis", "iso-2022-jp":
rmsg.Text = toUTF8(b.GetString("Charset"), rmsg.Text)
default:
r, err := charset.NewReader(mycharset, strings.NewReader(rmsg.Text))
if err != nil {
b.Log.Errorf("charset to utf-8 conversion failed: %s", err)
return
}
output, _ := ioutil.ReadAll(r)
rmsg.Text = string(output)
}
b.Log.Debugf("<= Sending message from %s on %s to gateway", event.Params[0], b.Account)
b.Remote <- rmsg
}
func (b *Birc) handleRunCommands() {
for _, cmd := range b.GetStringSlice("RunCommands") {
cmd = strings.ReplaceAll(cmd, "{BOTNICK}", b.Nick)
if err := b.i.Cmd.SendRaw(cmd); err != nil {
b.Log.Errorf("RunCommands %s failed: %s", cmd, err)
}
time.Sleep(time.Second)
}
}
func (b *Birc) handleTopicWhoTime(client *girc.Client, event girc.Event) {
parts := strings.Split(event.Params[2], "!")
t, err := strconv.ParseInt(event.Params[3], 10, 64)
if err != nil {
b.Log.Errorf("Invalid time stamp: %s", event.Params[3])
}
user := parts[0]
if len(parts) > 1 {
user += " [" + parts[1] + "]"
}
b.Log.Debugf("%s: Topic set by %s [%s]", event.Command, user, time.Unix(t, 0))
}