public async IAsyncEnumerable <MessageContentGrpcModel> GetMessagesFromMessageId(string topicId, long fromMessageId,
int maxMessagesAmount, string reason)
{
var pageId = MessagesContentPagesUtils.GetPageId(fromMessageId);
var maxPageId = pageId.Value + 2;
var messageNo = 0;
while (pageId.Value < maxPageId)
{
var page = await TryGetPageAsync(topicId, pageId, reason);
foreach (var message in page.GetMessages())
{
if (message.MessageId >= fromMessageId)
{
yield return(message);
messageNo++;
}
if (messageNo >= maxMessagesAmount)
{
yield break;
}
}
pageId = new MessagePageId(pageId.Value + 1);
}
}
public async IAsyncEnumerable <MessageContentGrpcModel> GetMessagesByDateAsync(string topicId, DateTime fromDate, string reason)
{
var messageId = await GetMessageIsByDateAsync(topicId, fromDate);
if (messageId <= 0)
{
yield break;
}
var pageId = MessagesContentPagesUtils.GetPageId(messageId);
var maxPageId = pageId.Value + 2;
while (pageId.Value <= maxPageId)
{
var page = await TryGetPageAsync(topicId, pageId, reason);
foreach (var message in page.GetMessages())
{
if (message.Created >= fromDate)
{
yield return(message);
}
}
pageId = pageId.NextPage();
}
}
public async Task <(MessageContentGrpcModel message, IMessageContentPage page)> TryGetMessageAsync(string topicId, long messageId, string reason)
{
var pageId = MessagesContentPagesUtils.GetPageId(messageId);
var page = await TryGetPageAsync(topicId, pageId, reason);
return(page?.TryGet(messageId), page);
}