public async Task OpenDoubleChatRoom(Models.OnlineUser invitee)
{
// Check this room is existed or not
var invitor = _chatContext.GetOnlineUser(Context.UserIdentifier);
var founDoubleRoom = _chatContext.GetDoubleRoom(invitor, invitee);
string chatRoomId = string.Empty;
string chatSessionId = string.Empty;
bool isExistedOnDb = false;
bool createNewSession = false;
ChatSessionModel chatSessionModel = null;
ChatSessionModel previousSessionModel = null;
ChatRoomModel chatRoomModel = null;
if (founDoubleRoom == null)
{
// Try to fetch from database
var foundRoomInDb = (await _chatRoomRepository
.GetAllAsync(a => a.Type == RoomType.Double &&
a.Participants.Any(b => b.Username == Context.UserIdentifier) &&
a.Participants.Any(c => c.Username == invitee.UserName))).FirstOrDefault();
if (foundRoomInDb != null)
{
chatRoomModel = new Models.ChatRoomModel
{
ChatRoomId = foundRoomInDb.Id,
Participants = new System.Collections.Generic.List <Models.OnlineUser>
{
invitor,
invitee
},
RoomName = invitee.FullName,
Type = RoomType.Double,
CreateDate = DateTime.UtcNow
};
_chatContext.LoadDoubleRoom(chatRoomModel);
isExistedOnDb = true;
chatRoomId = foundRoomInDb.Id;
}
else
{
// Create new chatroom
var chatRoom = new ChatRoom
{
Id = DataUtil.GenerateUniqueId(),
CreatedDate = DateTime.UtcNow,
Participants = new List <Participant>
{
new Participant
{
Id = DataUtil.GenerateUniqueId(),
JoinedDate = DateTime.UtcNow,
Username = invitor.UserName
},
new Participant
{
Id = DataUtil.GenerateUniqueId(),
JoinedDate = DateTime.UtcNow,
Username = invitee.UserName
}
},
RoomName = invitee.UserName,
Sessions = new List <ChatSession>(),
Type = RoomType.Double
};
await _chatRoomRepository.AddAsync(chatRoom);
chatRoomModel = new Models.ChatRoomModel
{
ChatRoomId = chatRoom.Id,
Participants = new System.Collections.Generic.List <Models.OnlineUser>
{
invitor,
invitee
},
RoomName = invitee.FullName,
Type = RoomType.Double,
CreateDate = DateTime.UtcNow
};
_chatContext.LoadDoubleRoom(chatRoomModel);
chatRoomId = chatRoom.Id;
createNewSession = true;
}
}
else
{
chatRoomId = founDoubleRoom.ChatRoomId;
chatRoomModel = founDoubleRoom;
chatSessionModel = _chatContext.GetCurrentChatSession(chatRoomId);
if (chatSessionModel == null)
{
createNewSession = true;
}
else if (!string.IsNullOrEmpty(chatSessionModel.PreviousSessionId))
{
previousSessionModel = _chatContext.GetChatSession(chatSessionModel.PreviousSessionId);
}
}
if (isExistedOnDb)
{
// Try to fetch last chat session
var foundLastSession = await _chatSessionRepository.GetLastChatSession(chatRoomId);
if (foundLastSession != null)
{
// In mind, we only create new chat session when it reached Threshold
// Or it belongs to previous day
if (foundLastSession.Conversations.Count >= _chatOptions.CurrentValue.ThresholdNumberOfMessages)
{
createNewSession = true;
// Load previous session
previousSessionModel = new ChatSessionModel
{
ChatRoomId = chatRoomId,
Messages = new Queue <MessageModel>(),
CreatedDate = foundLastSession.CreatedDate,
PreviousSessionId = foundLastSession.PreviousSessionId,
SessionId = foundLastSession.Id
};
if (foundLastSession.Conversations != null)
{
foreach (var message in foundLastSession.Conversations.OrderBy(a => a.Timestamp))
{
previousSessionModel.Messages.Enqueue(new MessageModel
{
Message = message.Message,
FormattedMessage = message.MessageTransform,
TimeStamp = message.Timestamp,
UserName = message.Username,
CreatedDate = message.CreatedDate,
AttachmentFiles = new List <AttachmentFile>()
});
}
}
_chatContext.AddChatRoomSession(previousSessionModel);
}
else
{
chatSessionModel = ChatSessionModel.LoadFrom(foundLastSession);
// Load one previous session if it had
if (!string.IsNullOrEmpty(chatSessionModel.PreviousSessionId))
{
var previousSession = await _chatSessionRepository.GetOneAsync(chatSessionModel.PreviousSessionId);
previousSessionModel = ChatSessionModel.LoadFrom(previousSession);
}
_chatContext.AddChatRoomSession(chatSessionModel);
}
}
else
{
createNewSession = true;
}
}
if (createNewSession)
{
chatSessionModel = new ChatSessionModel
{
SessionId = DataUtil.GenerateUniqueId(),
ChatRoomId = chatRoomId,
Messages = new Queue <MessageModel>(),
CreatedDate = DateTime.UtcNow,
PreviousSessionId = previousSessionModel?.SessionId
};
if (previousSessionModel != null)
{
previousSessionModel.NextSessionId = chatSessionModel.SessionId;
}
_chatContext.AddChatRoomSession(chatSessionModel);
}
// Allow target user to prepare a chatroom
await Clients
.User(invitee.UserName)
.ReadyDoubleChatRoom(
chatRoomModel,
chatSessionModel,
invitor,
previousSessionModel);
await Clients.Caller.LoadDoubleChatRoom(
chatRoomModel,
chatSessionModel,
invitee,
previousSessionModel);
}