private string FindMessageToDeleteTimeStamp(SlackMessage message)
{
var attachmentTimeStamp = message.Attachments.Last().TimeStamp;
var attachmentToFind = message.Attachments.Last();
var messageToDeletesTimeStamp = ExtractMessageToDeleteTimeStamp(attachmentToFind, _cachedMessageListResponse);
if (messageToDeletesTimeStamp != null)
{
return(messageToDeletesTimeStamp);
}
var unixTimeStamp = attachmentTimeStamp.ToUnixTimeSeconds();
var queryParameters = new Dictionary <string, string>
{
// Download 2x the buffer in-case there was chatter in the channel we're posting to.
["count"] = (2 * _configuration.MessageBufferSize).ToString(),
// Oldest should be 1 second less than the timestamp we're looking for to ensure we captuer it.
["oldest"] = (unixTimeStamp - 10).ToString(),
["inclusive"] = "1",
["channel"] = _channelId
};
var authorizedQuery = GetAuthorizedQuery(queryParameters);
var channelMessageHistoryUri = new Uri(_configuration.SlackApiUrl + ChannelMessageHistoryApi + authorizedQuery);
var result = _httpClient.PostJsonWithRetry(channelMessageHistoryUri);
var resultContent = result.Content.ReadAsStringAsync().Result;
_cachedMessageListResponse = JsonConvert.DeserializeObject <SlackMessageListResponse>(resultContent);
messageToDeletesTimeStamp = ExtractMessageToDeleteTimeStamp(attachmentToFind, _cachedMessageListResponse);
return(messageToDeletesTimeStamp);
}
private string ExtractMessageToDeleteTimeStamp(
SlackAttachment originalAttachment,
SlackMessageListResponse messageListResponse)
{
if (messageListResponse == null)
{
return(null);
}
var originalAttachmentFallback = originalAttachment.Fallback;
var guidMarker = originalAttachmentFallback.Substring(originalAttachmentFallback.Length - 36);
string messageToDeletesTimeStamp = null;
foreach (var responseMessage in messageListResponse.Messages)
{
if (responseMessage.Attachments?.Any(attachment => attachment.Fallback?.EndsWith(guidMarker, StringComparison.Ordinal) == true) == true)
{
messageToDeletesTimeStamp = responseMessage.TimeStamp;
}
}
return(messageToDeletesTimeStamp);
}
