private List <MailMessageData> GetFilteredConversations(IDaoFactory daoFactory, MailSearchFilterData filter, out bool hasMore)
{
var conversations = new List <MailMessageData>();
var skipFlag = false;
var chunkIndex = 0;
if (filter.FromDate.HasValue && filter.FromMessage.HasValue && filter.FromMessage.Value > 0)
{
skipFlag = true;
}
var prevFlag = filter.PrevFlag.GetValueOrDefault(false);
var tenantInfo = CoreContext.TenantManager.GetTenant(Tenant);
var utcNow = DateTime.UtcNow;
var pageSize = filter.PageSize.GetValueOrDefault(25);
var daoMailInfo = daoFactory.CreateMailInfoDao(Tenant, User);
while (conversations.Count < pageSize + 1)
{
filter.PageSize = CHUNK_SIZE * pageSize;
IMessagesExp exp = null;
if (!filter.IsDefault() && FactoryIndexer <MailWrapper> .Support && FactoryIndexer.CheckState(false))
{
filter.Page = chunkIndex * CHUNK_SIZE * pageSize; // Elastic Limit from {index of last message} to {count of messages}
List <MailWrapper> mailWrappers;
if (FilterChainMessagesExp.TryGetFullTextSearchChains(filter, User, out mailWrappers))
{
if (!mailWrappers.Any())
{
break;
}
var ids = mailWrappers.Select(c => c.Id).ToList();
var query = SimpleMessagesExp.CreateBuilder(Tenant, User)
.SetMessageIds(ids)
.SetOrderBy(filter.Sort);
if (prevFlag)
{
query.SetOrderAsc(!(filter.SortOrder == Defines.ASCENDING));
}
else
{
query.SetOrderAsc(filter.SortOrder == Defines.ASCENDING);
}
exp = query
.Build();
}
}
else
{
filter.Page = chunkIndex; // MySQL Limit from {page by size} to {size}
exp = new FilterChainMessagesExp(filter, Tenant, User);
}
chunkIndex++;
var listMessages = daoMailInfo.GetMailInfoList(exp, true)
.ConvertAll(m => MessageEngine.ToMailMessage(m, tenantInfo, utcNow));
if (0 == listMessages.Count)
{
break;
}
if (skipFlag && filter.FromMessage.HasValue)
{
var messageData = listMessages.FirstOrDefault(m => m.Id == filter.FromMessage.Value);
if (messageData != null)
{
// Skip chain messages by FromMessage.
listMessages =
listMessages.Where(
m => !(m.ChainId.Equals(messageData.ChainId) && m.MailboxId == messageData.MailboxId))
.ToList();
}
skipFlag = false;
}
foreach (var messageData in listMessages)
{
var existingChainIndex =
conversations.FindIndex(
c => c.ChainId == messageData.ChainId && c.MailboxId == messageData.MailboxId);
if (existingChainIndex > -1)
{
if (conversations[existingChainIndex].Date < messageData.Date)
{
conversations[existingChainIndex] = messageData;
}
}
else
{
conversations.Add(messageData);
}
}
if (conversations.Count > pageSize)
{
break;
}
}
hasMore = conversations.Count > pageSize;
if (hasMore)
{
conversations = conversations.Take(pageSize).ToList();
}
if (prevFlag)
{
conversations.Reverse();
}
return(conversations);
}
