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main.go
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main.go
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package main
import (
"errors"
"flag"
"fmt"
"log"
"os"
"regexp"
"strings"
"github.com/boltdb/bolt"
"github.com/nlopes/slack"
)
var (
token = flag.String("token", "", "Token for Slack")
fromChannel = flag.String("from", "", "Name of channel where to look for messages")
toChannel = flag.String("to", "", "Name of channel where to post messages")
slackUser = flag.String("user", "", "User name for Slack")
debug = flag.Bool("debug", false, "Enable debug mode")
textKeywords = []string{"ваканси", "работа", "позици", "тестировщик", "автоматизатор", "должность", "требования"}
linkKeywords = []string{"hh.ru", "job", "linkedin.com/jobs", "position", "vacancy", "work", "career"}
exclusions = []string{".slack.com", "linkedin.com/comm/profile", "linkedin.com/profile"}
fromID, toID, userID string
userMap map[string]string
)
const (
bucket = "QA-SLACK"
regexURL = "(http|https)://([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:/~+#-]*[\\w@?^=%&/~+#-])?"
regexEmail = "([a-zA-Z0-9][-_.a-zA-Z0-9]*)(@[-_.a-zA-Z0-9]+)"
wrongChannelID = "Wrong channel ID"
wrongUserID = "Wrong user ID"
messageIsNotJobPosting = "Not job posting"
messageIsAlreadyPosted = "Already posted"
)
type slacker interface {
Repost(string, string) error
Delete(string, string) error
}
type slackerClient struct {
Slack *slack.Client
}
func (c slackerClient) Repost(toID, text string) error {
params := slack.PostMessageParameters{
AsUser: true,
}
_, _, err := c.Slack.PostMessage(toID, text, params)
return err
}
func (c slackerClient) Delete(toID, timestamp string) error {
_, _, err := c.Slack.DeleteMessage(toID, timestamp)
return err
}
type slackClient struct {
Client slacker
Storage *bolt.DB
}
func (c *slackClient) RepostMessage(ev *slack.MessageEvent, r []*regexp.Regexp) error {
if ev.Channel != fromID {
return errors.New(wrongChannelID)
}
if len(ev.Attachments) > 0 {
return errors.New(messageIsNotJobPosting)
}
text := ev.Text
if ev.SubMessage != nil && ev.SubMessage.Text != "" {
text = ev.SubMessage.Text
}
if !isJobPosting(text, r) {
return errors.New(messageIsNotJobPosting)
}
text = strings.Replace(text, "<", "", -1)
text = strings.Replace(text, ">", "", -1)
if strings.Contains(text, "@U") {
text = replaceIDWithNickname(text)
}
if alreadyPosted(text, c.Storage) {
return errors.New(messageIsAlreadyPosted)
}
savePosted(text, c.Storage)
err := c.Client.Repost(toID, text)
return err
}
func (c *slackClient) DeleteMessage(ev *slack.MessageEvent) error {
if ev.Channel != toID {
return errors.New(wrongChannelID)
}
if ev.User == userID {
return errors.New(wrongUserID)
}
err := c.Client.Delete(toID, ev.Timestamp)
return err
}
func main() {
flag.Parse()
log.SetFlags(log.Lshortfile | log.LstdFlags)
userMap = make(map[string]string)
if *token == "" || *fromChannel == "" || *toChannel == "" || *slackUser == "" {
fmt.Println("Specify correct flags")
flag.PrintDefaults()
os.Exit(1)
}
db, err := bolt.Open("repost.db", 0600, nil)
if err != nil {
log.Fatal("Can't open DB: ", err)
}
defer db.Close()
err = db.Update(func(tx *bolt.Tx) error {
_, err = tx.CreateBucketIfNotExists([]byte(bucket))
return err
})
if err != nil {
log.Fatal("Can't create bucket: ", err)
}
var regexList []*regexp.Regexp
r, err := regexp.Compile(regexURL)
if err != nil {
log.Fatal("Can't compile regexp: ", err)
}
regexList = append(regexList, r)
r, err = regexp.Compile(regexEmail)
if err != nil {
log.Fatal("Can't compile regexp: ", err)
}
regexList = append(regexList, r)
api := slack.New(*token)
api.SetDebug(*debug)
client := &slackClient{
Client: slackerClient{
Slack: api,
},
Storage: db,
}
getSlackUserID(api)
getSlackChannelID(api)
rtm := api.NewRTM()
go rtm.ManageConnection()
for {
msg := <-rtm.IncomingEvents
fmt.Println("Event Received")
switch ev := msg.Data.(type) {
case *slack.MessageEvent:
client.RepostMessage(ev, regexList)
client.DeleteMessage(ev)
case *slack.RTMError:
fmt.Printf("Error: %s\n", ev.Error())
case *slack.InvalidAuthEvent:
fmt.Println("Error: Invalid credentials!")
break
}
}
}
func isJobPosting(text string, r []*regexp.Regexp) bool {
text = strings.ToLower(text)
withKeyword := containsKeyword(text, textKeywords) || containsKeyword(text, linkKeywords)
skypeRule := strings.HasPrefix(text, "[skype -")
var regexValidated bool
for _, rgxp := range r {
if rgxp.MatchString(text) {
regexValidated = true
break
}
}
var validatedText bool
if skypeRule {
validatedText = true
} else {
if regexValidated {
validatedText = withKeyword
}
}
return validatedText && validateExclusions(text)
}
func containsKeyword(text string, list []string) bool {
result := false
for _, v := range list {
if strings.Contains(text, v) {
result = true
break
}
}
return result
}
func validateExclusions(text string) bool {
for _, v := range exclusions {
if strings.Contains(text, v) {
return false
}
}
return true
}
func replaceIDWithNickname(text string) string {
if len(text) <= 10 {
return text
}
count := strings.Count(text, "@U")
place := 0
start := 0
for i := 0; i < count; i++ {
if len(text[place:])-start >= 10 {
start := strings.Index(text, "@U")
place += start + 1
id := text[start+1 : start+10]
nickname, ok := userMap[id]
if ok {
text = strings.Replace(text, id, nickname, -1)
}
}
}
return text
}
func getSlackUserID(api *slack.Client) {
users, err := api.GetUsers()
if err != nil {
log.Fatal("Can't get list of users:", err)
}
for _, user := range users {
userMap[user.ID] = user.Name
if user.Name == *slackUser {
userID = user.ID
}
}
}
func getSlackChannelID(api *slack.Client) {
channels, err := api.GetChannels(false)
if err != nil {
log.Fatal("Can't get list of channels:", err)
}
for _, channel := range channels {
switch channel.Name {
case *fromChannel:
fromID = channel.ID
case *toChannel:
toID = channel.ID
default:
}
}
}
func alreadyPosted(text string, db *bolt.DB) bool {
err := db.View(func(tx *bolt.Tx) error {
bucket := tx.Bucket([]byte(bucket))
bytes := bucket.Get([]byte(text))
if bytes != nil {
return errors.New("")
}
return nil
})
return err != nil
}
func savePosted(text string, db *bolt.DB) {
err := db.Update(func(tx *bolt.Tx) error {
bucket := tx.Bucket([]byte(bucket))
err := bucket.Put([]byte(text), []byte(text))
return err
})
if err != nil {
log.Println(err)
}
}