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package birc
import (
"crypto/tls"
"fmt"
"github.com/42wim/matterbridge/bridge/config"
log "github.com/Sirupsen/logrus"
ircm "github.com/sorcix/irc"
"github.com/thoj/go-ircevent"
"regexp"
"sort"
"strconv"
"strings"
"time"
)
type Birc struct {
i *irc.Connection
Nick string
names map[string][]string
Config *config.Protocol
Remote chan config.Message
connected chan struct{}
Local chan config.Message // local queue for flood control
Account string
}
var flog *log.Entry
var protocol = "irc"
func init() {
flog = log.WithFields(log.Fields{"module": protocol})
}
func New(cfg config.Protocol, account string, c chan config.Message) *Birc {
b := &Birc{}
b.Config = &cfg
b.Nick = b.Config.Nick
b.Remote = c
b.names = make(map[string][]string)
b.Account = account
b.connected = make(chan struct{})
if b.Config.MessageDelay == 0 {
b.Config.MessageDelay = 1300
}
if b.Config.MessageQueue == 0 {
b.Config.MessageQueue = 30
}
b.Local = make(chan config.Message, b.Config.MessageQueue+10)
return b
}
func (b *Birc) Command(msg *config.Message) string {
switch msg.Text {
case "!users":
b.i.AddCallback(ircm.RPL_NAMREPLY, b.storeNames)
b.i.AddCallback(ircm.RPL_ENDOFNAMES, b.endNames)
b.i.SendRaw("NAMES " + msg.Channel)
}
return ""
}
func (b *Birc) Connect() error {
flog.Infof("Connecting %s", b.Config.Server)
i := irc.IRC(b.Config.Nick, b.Config.Nick)
if log.GetLevel() == log.DebugLevel {
i.Debug = true
}
i.UseTLS = b.Config.UseTLS
i.UseSASL = b.Config.UseSASL
i.SASLLogin = b.Config.NickServNick
i.SASLPassword = b.Config.NickServPassword
i.TLSConfig = &tls.Config{InsecureSkipVerify: b.Config.SkipTLSVerify}
if b.Config.Password != "" {
i.Password = b.Config.Password
}
i.AddCallback(ircm.RPL_WELCOME, b.handleNewConnection)
err := i.Connect(b.Config.Server)
if err != nil {
return err
}
b.i = i
select {
case <-b.connected:
flog.Info("Connection succeeded")
case <-time.After(time.Second * 30):
return fmt.Errorf("connection timed out")
}
i.Debug = false
go b.doSend()
return nil
}
func (b *Birc) JoinChannel(channel string) error {
b.i.Join(channel)
return nil
}
func (b *Birc) Send(msg config.Message) error {
flog.Debugf("Receiving %#v", msg)
if msg.Account == b.Account {
return nil
}
if strings.HasPrefix(msg.Text, "!") {
b.Command(&msg)
return nil
}
for _, text := range strings.Split(msg.Text, "\n") {
if len(b.Local) < b.Config.MessageQueue {
if len(b.Local) == b.Config.MessageQueue-1 {
text = text + " <message clipped>"
}
b.Local <- config.Message{Text: text, Username: msg.Username, Channel: msg.Channel}
} else {
flog.Debugf("flooding, dropping message (queue at %d)", len(b.Local))
}
}
return nil
}
func (b *Birc) doSend() {
rate := time.Millisecond * time.Duration(b.Config.MessageDelay)
throttle := time.Tick(rate)
for msg := range b.Local {
<-throttle
b.i.Privmsg(msg.Channel, msg.Username+msg.Text)
}
}
func (b *Birc) endNames(event *irc.Event) {
channel := event.Arguments[1]
sort.Strings(b.names[channel])
maxNamesPerPost := (300 / b.nicksPerRow()) * b.nicksPerRow()
continued := false
for len(b.names[channel]) > maxNamesPerPost {
b.Remote <- config.Message{Username: b.Nick, Text: b.formatnicks(b.names[channel][0:maxNamesPerPost], continued),
Channel: channel, Account: b.Account}
b.names[channel] = b.names[channel][maxNamesPerPost:]
continued = true
}
b.Remote <- config.Message{Username: b.Nick, Text: b.formatnicks(b.names[channel], continued),
Channel: channel, Account: b.Account}
b.names[channel] = nil
}
func (b *Birc) handleNewConnection(event *irc.Event) {
flog.Debug("Registering callbacks")
i := b.i
b.Nick = event.Arguments[0]
i.AddCallback("PRIVMSG", b.handlePrivMsg)
i.AddCallback("CTCP_ACTION", b.handlePrivMsg)
i.AddCallback(ircm.RPL_TOPICWHOTIME, b.handleTopicWhoTime)
i.AddCallback(ircm.NOTICE, b.handleNotice)
//i.AddCallback(ircm.RPL_MYINFO, func(e *irc.Event) { flog.Infof("%s: %s", e.Code, strings.Join(e.Arguments[1:], " ")) })
i.AddCallback("PING", func(e *irc.Event) {
i.SendRaw("PONG :" + e.Message())
flog.Debugf("PING/PONG")
})
i.AddCallback("*", b.handleOther)
// we are now fully connected
b.connected <- struct{}{}
}
func (b *Birc) handleNotice(event *irc.Event) {
if strings.Contains(event.Message(), "This nickname is registered") && event.Nick == b.Config.NickServNick {
b.i.Privmsg(b.Config.NickServNick, "IDENTIFY "+b.Config.NickServPassword)
} else {
b.handlePrivMsg(event)
}
}
func (b *Birc) handleOther(event *irc.Event) {
switch event.Code {
case "372", "375", "376", "250", "251", "252", "253", "254", "255", "265", "266", "002", "003", "004", "005":
return
}
flog.Debugf("%#v", event.Raw)
}
func (b *Birc) handlePrivMsg(event *irc.Event) {
// don't forward queries to the bot
if event.Arguments[0] == b.Nick {
return
}
// don't forward message from ourself
if event.Nick == b.Nick {
return
}
flog.Debugf("handlePrivMsg() %s %s %#v", event.Nick, event.Message(), event)
msg := ""
if event.Code == "CTCP_ACTION" {
msg = event.Nick + " "
}
msg += event.Message()
// strip IRC colors
re := regexp.MustCompile(`[[:cntrl:]](\d+,|)\d+`)
msg = re.ReplaceAllString(msg, "")
flog.Debugf("Sending message from %s on %s to gateway", event.Arguments[0], b.Account)
b.Remote <- config.Message{Username: event.Nick, Text: msg, Channel: event.Arguments[0], Account: b.Account}
}
func (b *Birc) handleTopicWhoTime(event *irc.Event) {
parts := strings.Split(event.Arguments[2], "!")
t, err := strconv.ParseInt(event.Arguments[3], 10, 64)
if err != nil {
flog.Errorf("Invalid time stamp: %s", event.Arguments[3])
}
user := parts[0]
if len(parts) > 1 {
user += " [" + parts[1] + "]"
}
flog.Debugf("%s: Topic set by %s [%s]", event.Code, user, time.Unix(t, 0))
}
func (b *Birc) nicksPerRow() int {
return 4
/*
if b.Config.Mattermost.NicksPerRow < 1 {
return 4
}
return b.Config.Mattermost.NicksPerRow
*/
}
func (b *Birc) storeNames(event *irc.Event) {
channel := event.Arguments[2]
b.names[channel] = append(
b.names[channel],
strings.Split(strings.TrimSpace(event.Message()), " ")...)
}
func (b *Birc) formatnicks(nicks []string, continued bool) string {
return plainformatter(nicks, b.nicksPerRow())
/*
switch b.Config.Mattermost.NickFormatter {
case "table":
return tableformatter(nicks, b.nicksPerRow(), continued)
default:
return plainformatter(nicks, b.nicksPerRow())
}
*/
}
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