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path: root/main.go
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package main

import (
	"flag"
	"fmt"
	"log"

	irc "github.com/fluffle/goirc/client"
)

type Notify struct {
	conn   *irc.Conn
	target string
}

func NewNotify(conn *irc.Conn, target string) *Notify {
	return &Notify{conn: conn, target: target}
}

func (n *Notify) Write(p []byte) (int, error) {
	const maxLen = 500
	sz := len(p)
	if sz > maxLen {
		p = append(p[:maxLen], []byte("...")...)
	}
	log.Printf("Send %s", p)
	n.conn.Notice(n.target, string(p))
	return sz, nil
}

func privmsg(room string) irc.HandlerFunc {
	return func(conn *irc.Conn, line *irc.Line) {
		switch t := line.Text(); {
		case isFlood(t):
			if line.Nick != conn.Me().Nick {
				log.Println("kick", line.Nick)
				conn.Kick(room, line.Nick)
			}
		default:
			for _, v := range getLinks(t) {
				title, err := getTitle(v)
				if err != nil {
					log.Printf("URL %v: %v", v, err)
				}
				if title != "" {
					fmt.Fprintf(NewNotify(conn, line.Target()), "Title: %v", title)
				}
			}
		}
	}
}

func main() {
	node := flag.String("node", "irc.freenode.org", "IRC Server")
	ssl := flag.Bool("ssl", false, "Use SSL")
	room := flag.String("room", "#lor", "IRC Channel")
	name := flag.String("name", "dim13", "Bots Name")
	flag.Parse()

	conf := irc.NewConfig(*name)
	conf.Server = *node
	conf.SSL = *ssl
	conn := irc.Client(conf)

	done := make(chan struct{})

	conn.HandleFunc(irc.DISCONNECTED, func(_ *irc.Conn, _ *irc.Line) {
		close(done)
	})

	conn.HandleFunc(irc.CONNECTED, func(conn *irc.Conn, _ *irc.Line) {
		conn.Join(*room)
		Watch(NewNotify(conn, *room), Feeds)
	})

	conn.HandleFunc(irc.PRIVMSG, privmsg(*room))

	conn.HandleFunc(irc.KICK, func(conn *irc.Conn, _ *irc.Line) {
		conn.Join(*room)
	})

	if err := conn.Connect(); err != nil {
		log.Fatal(err)
	}
	<-done
}