/
main.go
187 lines (170 loc) · 4.09 KB
/
main.go
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package main
import (
"encoding/json"
"flag"
"fmt"
"io/ioutil"
"log"
"net/http"
"net/url"
"os"
"strings"
"time"
irc "github.com/thoj/go-ircevent"
"gopkg.in/yaml.v2"
)
const Slackbot = "slackbot"
var (
WebhookURL string
WebhookToken string
ListenAddr string
SlackChannel string
IRCChannel string
IRCNick string
IRCHost string
IRCPort int
IRCPassword string
IRCSecure bool
IconMap IconMapFile
)
func main() {
var (
iconMapFilename string
)
flag.StringVar(&WebhookURL, "webhook-url", "", "Slack Incomming Webhook URL")
flag.StringVar(&WebhookToken, "webhook-token", "", "Slack Outgoing Webhook token")
flag.StringVar(&ListenAddr, "listen", ":7777", "HTTP listen address (for accept Outgoing Webhook)")
flag.StringVar(&IRCNick, "nick", "sirbot", "IRC nick")
flag.StringVar(&IRCHost, "irc-host", "localhost", "IRC server host")
flag.IntVar(&IRCPort, "irc-port", 6666, "IRC server port")
flag.StringVar(&IRCPassword, "irc-password", "", "IRC server password")
flag.BoolVar(&IRCSecure, "irc-secure", false, "IRC use SSL")
flag.StringVar(&IRCChannel, "irc-channel", "", "IRC channel to join")
flag.StringVar(&SlackChannel, "slack-channel", "", "Slack channel to join")
flag.StringVar(&iconMapFilename, "icon-map", "", "icon map file(yaml)")
flag.Parse()
if iconMapFilename != "" {
var err error
IconMap, err = LoadIconMap(iconMapFilename)
if err != nil {
log.Println(err)
}
}
ch := make(chan Message, 10)
go startHttpServer(ch)
slack := &SlackAgent{
WebhookURL: WebhookURL,
client: &http.Client{},
}
agent := irc.IRC(IRCNick, IRCNick)
agent.UseTLS = IRCSecure
agent.Password = IRCPassword
err := agent.Connect(fmt.Sprintf("%s:%d", IRCHost, IRCPort))
if err != nil {
log.Println(err)
return
}
agent.AddCallback("001", func(e *irc.Event) {
agent.Join(IRCChannel)
log.Println("Joined", IRCChannel)
})
agent.AddCallback("PRIVMSG", func(e *irc.Event) {
nick := strings.ToLower(e.Nick)
msg := Message{
Channel: SlackChannel,
Text: e.Message(),
UserName: fmt.Sprintf(
"%s[%s]",
e.Nick,
e.Arguments[0], // channel
),
LinkNames: 1,
}
if u := IconMap.Icons[nick]; u != "" {
msg.IconURL = u
}
err := slack.Post(msg)
if err != nil {
log.Println("[error]", err)
}
})
go func() {
for {
msg := <-ch
agent.Privmsg(IRCChannel, msg.Text)
time.Sleep(1 * time.Second)
}
}()
agent.Loop()
}
func startHttpServer(ch chan Message) {
http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
if token := req.FormValue("token"); token != WebhookToken {
log.Println("[warn] Invalid token:", token)
return
}
userName := req.FormValue("user_name")
if userName == Slackbot {
return
}
text := fmt.Sprintf("[%s] %s", userName, req.FormValue("text"))
msg := Message{
Channel: IRCChannel,
UserName: userName,
Text: text,
}
select {
case ch <- msg:
default:
}
})
log.Fatal(http.ListenAndServe(ListenAddr, nil))
}
type Message struct {
Channel string `json:"channel"`
Text string `json:"text"`
IconEmoji string `json:"icon_emoji"`
IconURL string `json:"icon_url"`
UserName string `json:"username"`
LinkNames int `json:"link_names"`
}
type SlackAgent struct {
WebhookURL string
client *http.Client
}
type IconMapFile struct {
Icons map[string]string `yaml:"icons"`
}
func LoadIconMap(file string) (IconMapFile, error) {
var im IconMapFile
log.Println("loading icon file", file)
f, err := os.Open(file)
if err != nil {
return im, err
}
content, err := ioutil.ReadAll(f)
if err != nil {
return im, err
}
err = yaml.Unmarshal(content, &im)
return im, nil
}
func (a *SlackAgent) Post(m Message) error {
payload, _ := json.Marshal(&m)
v := url.Values{}
v.Set("payload", string(payload))
log.Println("post to slack", a, string(payload))
resp, err := a.client.PostForm(a.WebhookURL, v)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusOK {
return nil
}
if body, err := ioutil.ReadAll(resp.Body); err == nil {
return fmt.Errorf("failed post to slack:%s", body)
} else {
return err
}
}