func fetchChannelHistory(api *slack.Client, ID string) []slack.Message {
historyParams := slack.NewHistoryParameters()
historyParams.Count = 1000
// Fetch History
history, err := api.GetChannelHistory(ID, historyParams)
check(err)
messages := history.Messages
latest := messages[len(messages)-1].Timestamp
for {
if history.HasMore != true {
break
}
historyParams.Latest = latest
history, err = api.GetChannelHistory(ID, historyParams)
check(err)
length := len(history.Messages)
if length > 0 {
latest = history.Messages[length-1].Timestamp
messages = append(messages, history.Messages...)
}
}
return messages
}
func cleanHistory(channelID string, api *slack.Client, msgQueue *utility.Queue, histSize int, histCond *sync.Cond, threadWait *sync.WaitGroup) {
defer threadWait.Done()
defer histCond.Signal()
histCond.L.Lock()
defer histCond.L.Unlock()
logging.Log.Infof("(%s) Starting cleanHistory", channelID)
histParams := slack.NewHistoryParameters()
histParams.Inclusive = true
histCountMax := 1000
// build history with histSize messages
logging.Log.Infof("(%s) Building history with %v messages", channelID, histSize)
var history *slack.History
var histErr error
nRemaining := histSize
for nRemaining > 0 {
if nRemaining > histCountMax {
histParams.Count = histCountMax
} else {
histParams.Count = nRemaining
}
history, histErr = api.GetChannelHistory(channelID, histParams)
if histErr != nil {
logging.Log.Errorf("(%s) Unable to get the channel history: %v", channelID, histErr)
return
}
iLastMsg := len(history.Messages) - 1
//logging.Log.Debug("0: %v, %v: %v", history.Messages[0].Timestamp, iLastMsg, history.Messages[iLastMsg].Timestamp)
logging.Log.Debugf("(%s) In skip loop; obtained history with %v messages", channelID, len(history.Messages))
for iMsg := iLastMsg; iMsg >= 0; iMsg-- {
msgQueue.Push(history.Messages[iMsg].Timestamp)
//logging.Log.Debugf("(%s) Pushing to queue: %s", channelID, history.Messages[iMsg].Timestamp)
}
if !history.HasMore {
return
}
histParams.Latest = history.Messages[iLastMsg].Timestamp
histParams.Inclusive = false
nRemaining -= histCountMax
}
histParams.Count = histCountMax
nDeleted := 0
for history.HasMore == true {
history, histErr = api.GetChannelHistory(channelID, histParams)
if histErr != nil {
logging.Log.Errorf("(%s) Unable to get the channel history: %v", channelID, histErr)
return
}
logging.Log.Debugf("(%s) Deleting %v items (latest: %v)", channelID, len(history.Messages), history.Latest)
for _ /*iMsg*/, message := range history.Messages {
//logging.Log.Debugf("(%s) Deleting: %s", channelID, message.Timestamp)
_, _ /*respChan, respTS,*/, respErr := api.DeleteMessage(channelID, message.Timestamp)
if respErr != nil {
logging.Log.Warningf("(%s) Unable to delete message: %v", channelID, respErr)
}
//logging.Log.Debugf("(%s) Deletion response: %s, %s, %v", channelID, respChan, respTS, respErr)
nDeleted++
}
histParams.Latest = history.Messages[len(history.Messages)-1].Timestamp
}
logging.Log.Noticef("(%s) Deleted %v messages", channelID, nDeleted)
return
}