forked from timblair/slack-archivebot
/
bot.go
143 lines (115 loc) · 3 KB
/
bot.go
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package main
import (
"fmt"
"log"
"os"
"strconv"
"strings"
"sync"
"time"
"github.com/nlopes/slack"
)
func main() {
slackToken := os.Getenv("ARCHIVEBOT_SLACK_TOKEN")
api := slack.New(slackToken)
//api.SetDebug(true)
channels, err := api.GetChannels(true)
if err != nil {
log.Printf("Error when loading channels: %s\n", err)
return
}
var wg sync.WaitGroup
wg.Add(2)
go func(c []slack.Channel) {
defer wg.Done()
archiveEmptyChannels(api, c)
}(channels)
go func(c []slack.Channel) {
defer wg.Done()
archiveInactiveChannels(api, c)
}(channels)
wg.Wait()
}
func archiveEmptyChannels(api *slack.Slack, c []slack.Channel) {
empty := filterEmptyChannels(api, c)
archiveChannels(api, empty, "emptiness")
}
func archiveInactiveChannels(api *slack.Slack, c []slack.Channel) {
inactive := filterInactiveChannels(api, c)
archiveChannels(api, inactive, "inactivity")
}
func archiveChannels(api *slack.Slack, c []slack.Channel, reason string) {
var wg sync.WaitGroup
for _, channel := range c {
fmt.Printf("Archiving #%s (%s) due to %s\n", channel.Name, channel.Id, reason)
wg.Add(1)
go func(c slack.Channel) {
defer wg.Done()
if err := api.ArchiveChannel(c.Id); err != nil {
log.Printf("Error archiving #%s (%s): %s\n", c.Name, c.Id, err)
}
}(channel)
}
wg.Wait()
}
func filterEmptyChannels(api *slack.Slack, c []slack.Channel) []slack.Channel {
empty := []slack.Channel{}
for _, channel := range c {
if channel.NumMembers == 0 {
empty = append(empty, channel)
}
}
return empty
}
type LastChannelMessage struct {
Channel slack.Channel
Timestamp int64
}
func filterInactiveChannels(api *slack.Slack, c []slack.Channel) []slack.Channel {
inactiveDays, _ := strconv.ParseInt(os.Getenv("ARCHIVEBOT_INACTIVE_DAYS"), 10, 32)
if inactiveDays == 0 {
inactiveDays = 30
}
timeout := int64(time.Now().Unix()) - (86400 * inactiveDays)
channels := []slack.Channel{}
res := make(chan LastChannelMessage)
for _, channel := range c {
go func(channel slack.Channel) {
timestamp, _ := lastMessageTimestamp(api, channel)
res <- LastChannelMessage{Channel: channel, Timestamp: timestamp}
}(channel)
}
for i := 0; i < len(c); i++ {
lcm := <-res
if lcm.Timestamp > 0 && lcm.Timestamp < timeout {
channels = append(channels, lcm.Channel)
}
}
close(res)
return channels
}
func lastMessageTimestamp(api *slack.Slack, channel slack.Channel) (int64, error) {
var latest string
for {
historyParams := slack.HistoryParameters{Count: 5}
if latest != "" {
historyParams.Latest = latest
}
history, err := api.GetChannelHistory(channel.Id, historyParams)
if err != nil {
return -1, err
}
if len(history.Messages) == 0 {
return -1, nil
}
for _, msg := range history.Messages {
latest = msg.Msg.Timestamp
if msg.SubType != "channel_join" && msg.SubType != "channel_leave" {
msgStamp := strings.Split(msg.Msg.Timestamp, ".")
if timestamp, err := strconv.ParseInt(msgStamp[0], 10, 32); err == nil {
return timestamp, nil
}
}
}
}
}