go-ircevent/irc.go

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// Copyright 2009 Thomas Jager <mail@jager.no> All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
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package irc
import (
"fmt"
"net"
"os"
"bufio"
"strings"
"time"
)
const (
VERSION = "GolangBOT v1.0"
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)
func reader(irc *IRCConnection) {
br := bufio.NewReader(irc.socket)
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for {
msg, err := br.ReadString('\n')
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if err != nil {
irc.Error <- err
return
}
irc.lastMessage = time.Seconds()
msg = msg[0 : len(msg)-2] //Remove \r\n
event := &IRCEvent{Raw: msg}
if msg[0] == ':' {
if i := strings.Index(msg, " "); i > -1 {
event.Source = msg[1:i]
msg = msg[i+1 : len(msg)]
} else {
fmt.Printf("Misformed msg from server: %#s\n", msg)
}
if i, j := strings.Index(event.Source, "!"), strings.Index(event.Source, "@"); i > -1 && j > -1 {
event.Nick = event.Source[0:i]
event.User = event.Source[i+1 : j]
event.Host = event.Source[j+1 : len(event.Source)]
}
}
args := strings.Split(msg, " :", 2)
if len(args) > 1 {
event.Message = args[1]
}
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args = strings.Split(args[0], " ", -1)
event.Code = strings.ToUpper(args[0])
if len(args) > 1 {
event.Arguments = args[1:len(args)]
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}
irc.RunCallbacks(event)
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}
}
func writer(irc *IRCConnection) {
for {
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b := []byte(<-irc.pwrite)
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if b == nil {
return
}
_, err := irc.socket.Write(b)
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if err != nil {
fmt.Printf("%s\n", err)
irc.Error <- err
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return
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}
}
}
//Pings the server if we have not recived any messages for 5 minutes
func pinger(i *IRCConnection) {
i.ticker = time.Tick(1000 * 1000 * 1000 * 60 * 4) //Every 4 minutes
i.ticker2 = time.Tick(1000 * 1000 * 1000 * 60 * 15) //Every 15 minutes
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for {
select {
case <-i.ticker:
if time.Seconds()-i.lastMessage > 60*4 {
i.SendRaw(fmt.Sprintf("PING %d", time.Nanoseconds()))
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}
case <-i.ticker2:
i.SendRaw(fmt.Sprintf("PING %d", time.Nanoseconds()))
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}
}
}
func (irc *IRCConnection) Join(channel string) {
irc.pwrite <- fmt.Sprintf("JOIN %s\r\n", channel)
}
func (irc *IRCConnection) Notice(target, message string) {
irc.pwrite <- fmt.Sprintf("NOTICE %s :%s\r\n", target, message)
}
func (irc *IRCConnection) Privmsg(target, message string) {
irc.pwrite <- fmt.Sprintf("PRIVMSG %s :%s\r\n", target, message)
}
func (irc *IRCConnection) SendRaw(message string) {
fmt.Printf("--> %s\n", message)
irc.pwrite <- fmt.Sprintf("%s\r\n", message)
}
func (i *IRCConnection) Reconnect() os.Error {
for {
fmt.Printf("Reconnecting to %s\n", i.server)
var err os.Error
i.socket, err = net.Dial("tcp", "", i.server)
if err == nil {
break
}
fmt.Printf("Error: %s\n", err)
}
fmt.Printf("Connected to %s (%s)\n", i.server, i.socket.RemoteAddr())
go reader(i)
go writer(i)
i.pwrite <- fmt.Sprintf("NICK %s\r\n", i.nick)
i.pwrite <- fmt.Sprintf("USER %s 0.0.0.0 0.0.0.0 :%s\r\n", i.user, i.user)
return nil
}
func (i *IRCConnection) Loop() {
for {
<-i.Error
i.Reconnect()
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}
}
func (i *IRCConnection) Connect(server string) os.Error {
i.server = server
fmt.Printf("Connecting to %s\n", i.server)
var err os.Error
i.socket, err = net.Dial("tcp", "", i.server)
if err != nil {
return err
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}
fmt.Printf("Connected to %s (%s)\n", i.server, i.socket.RemoteAddr())
i.pread = make(chan string, 100)
i.pwrite = make(chan string, 100)
i.Error = make(chan os.Error, 10)
go reader(i)
go writer(i)
go pinger(i)
i.pwrite <- fmt.Sprintf("NICK %s\r\n", i.nick)
i.pwrite <- fmt.Sprintf("USER %s 0.0.0.0 0.0.0.0 :%s\r\n", i.user, i.user)
return nil
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}
func IRC(nick string, user string) *IRCConnection {
irc := new(IRCConnection)
irc.registered = false
irc.pread = make(chan string, 100)
irc.pwrite = make(chan string, 100)
irc.Error = make(chan os.Error)
irc.nick = nick
irc.user = user
irc.setupCallbacks()
return irc
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}