irc bot in golang

bot.go

package main

import (
	"bufio"
	"fmt"
	"gopkg.in/ini.v1"
	"net"
	"os"
	"regexp"
	"strings"
	"sync"
)

type Bot struct {
	nickname   string
	realname   string
	hostname   string
	servername string
	username   string

	server   string
	channels []string

	incoming chan string
	outgoing chan string
	group    *sync.WaitGroup
	reader   *bufio.Reader
	writer   *bufio.Writer
}

func (bot Bot) Initiate() {
	var wg sync.WaitGroup
	bot.group = &wg

	wg.Add(1)

	bot.incoming = make(chan string)
	bot.outgoing = make(chan string)

	if conn, err := net.Dial("tcp", bot.server); err != nil {
		fmt.Println(err)
		os.Exit(1)
	} else {
		bot.reader = bufio.NewReader(conn)
		bot.writer = bufio.NewWriter(conn)

		go bot.ReadFromNetwork()
		go bot.HandleIncomingMessages()
		go bot.HandleOutgoingMessages()
		wg.Wait()
	}
}

func (bot Bot) ReadFromNetwork() {
	defer bot.group.Done()
	for {
		if line, err := bot.reader.ReadString('\n'); err != nil {
			fmt.Println(err)
			break
		} else {
			bot.incoming <- line
		}
	}
}

func (bot Bot) HandleIncomingMessages() {
	message := <-bot.incoming
	bot.HandleUser()
	bot.HandleAutoJoin()
	for {
		fmt.Printf("<-- %s", message)
		bot.HandlePing(message)
		message = <-bot.incoming
	}
}

func (bot Bot) HandleOutgoingMessages() {
	for {
		message := <-bot.outgoing
		bot.writer.WriteString(message + "\n")
		bot.writer.Flush()
		fmt.Printf("--> %s\n", message)
	}
}

/* Protocol functions here. Pull out to separate file later */
func (bot Bot) HandleUser() {
	bot.outgoing <- fmt.Sprintf("USER %s %s %s %s",
		bot.username,
		bot.hostname,
		bot.servername,
		bot.realname)
	bot.outgoing <- fmt.Sprintf("NICK %s", bot.nickname)
}

func (bot Bot) HandleAutoJoin() {
	for _, channel := range bot.channels {
		bot.outgoing <- fmt.Sprintf("JOIN #%s", channel)
	}
}

func (bot Bot) HandlePing(msg string) {
	exp := regexp.MustCompile(`^PING :(.*)`)
	if matches := exp.FindStringSubmatch(msg); len(matches) > 0 {
		bot.outgoing <- fmt.Sprintf("PONG :%s", matches[1])
	}
}

func MakeBotFromConfig(cfg *ini.File) Bot {
	/* Config Example

	nickname = godukes
	username = godukes
	hostname = godukes
	servername = godukes
	realname = godukes
	server = irc.freenode.net:6667
	channels = gogobotbot godukes

	*/
	return Bot{
		nickname:   cfg.Section("").Key("nickname").Value(),
		username:   cfg.Section("").Key("username").Value(),
		hostname:   cfg.Section("").Key("hostname").Value(),
		servername: cfg.Section("").Key("servername").Value(),
		realname:   cfg.Section("").Key("realname").Value(),
		server:     cfg.Section("").Key("server").Value(),
		channels:   strings.Fields(cfg.Section("").Key("channels").Value()),
	}
}

func main() {
	if cfg, err := ini.Load("bot.ini"); err != nil {
		fmt.Println(err)
	} else {
		bot := MakeBotFromConfig(cfg)
		bot.Initiate()
	}
}