public ActionResult <GetChatResponce> GetMinimumChat(GetMinimumChatRequest req)
{
GetChatResponce chat = service.GetMinimumChat(req, ClientsUserId);
if (chat == null)
{
return(NotFound());
}
return(Ok(chat));
}
public GetChatResponce GetMinimumChat(GetMinimumChatRequest req, string userId)
{
if (!req.MemberUserIds.Contains(userId))
{
return(null);
}
List <FilterDefinition <Chat> > filters = new List <FilterDefinition <Chat> > {
Builders <Chat> .Filter
.Size(c => c.Members, req.MemberUserIds.Count())
};
foreach (string id in req.MemberUserIds)
{
filters.Add(
Builders <Chat> .Filter.ElemMatch(c =>
c.Members, m => m.UserId == id));
}
var filter = Builders <Chat> .Filter.And(filters);
var projection = Builders <Chat> .Projection
.Expression(c => new GetChatResponce {
Id = c.Id,
Members = c.Members,
UpdatedAt = c.UpdatedAt,
Messages = c.MessageLists.First().Messages,
CreatedAt = c.CreatedAt,
MessageListIndex = 0
});
var res = collection
.Find(filter)
.Project(projection)
.FirstOrDefault();
return(res);
}
