Simple IRC Bot (Go Programming Language Sample Code)

main.go

package main

import (
    "fmt"
    "net"
    "bufio"
    "strings"
    "net/textproto"
)

func main() {

    var server string = "irc.freenode.net"
    var port string = "6667"
    var ircNick string = "ferdinandsilva"
    var ircChannel string = "ferdinandsilva"

    conn, err := net.Dial("tcp", server + ":" + port)

    if err != nil {
        fmt.Println("Can't connect to ", server)
    } else {
        defer conn.Close()

        reader := bufio.NewReader(conn)
        tp := textproto.NewReader(reader)
        needBreak := false

        for {

            if needBreak {
                break
            }

            data, err := tp.ReadLine()
            if err == nil {
                fmt.Println(data)

                switch {
                    case strings.Contains(data, "Checking Ident"):
                        fmt.Fprintf(conn, "NICK " + ircNick + "\r\n")
                        fmt.Fprintf(conn, "USER " + ircNick + " \"" + ircNick + ".com\" \"" + server + "\" :" + ircNick + " robot\r\n")
                    case strings.Contains(data, "This nickname is registered"):
                        fmt.Println("Nickname is registered, please change the ircNick value.")
                        needBreak = true
                    case strings.Contains(data, "Nickname is already in use"):
                        fmt.Println("Nickname is in use, please change the ircNick value.")
                        needBreak = true
                    case strings.Contains(data, "Erroneous Nickname"):
                        fmt.Println("Nickname is erroneous, please change the ircNick value.")
                        needBreak = true
                    case strings.Contains(data, "End of /MOTD command"):
                        fmt.Fprintf(conn, "JOIN #" + ircChannel + "\r\n")
                    case strings.Contains(data, "PING :"):
                        fmt.Fprintf(conn, strings.Replace(data, "PING", "PONG", 1) + "\r\n")
                    case strings.Contains(data, "JOIN #"):
                        fmt.Fprintf(conn, "PRIVMSG #" + ircChannel + " :Magandang araw sa'yo!!!\r\n")
                }

            } else {
                fmt.Println("Disconnected to: ", server)
                break
            }
        }
    }
}