public override async Task OnDisconnected(bool stopCalled)
{
var client = (from p in _clientModel where p.ConnectionID == Context.ConnectionId select p).FirstOrDefault();
if (client != null)
{
await base.Clients.Others.AlertNewUserOnline(new Message()
{
Username = client.UserName,
MessageContent = $"{client.UserName} has left the chat.",
CreateTime = DateTime.UtcNow,
IsAdmin = true
});
_clientModel.Remove(client);
await base.Clients.Others.UserOff(client);
await _messageModel.Create(new Message()
{
Username = null, MessageContent = $"{client.UserName} has left the chat."
});
}
}
public object FetchMessages([FromQuery] TokenQueryModel tokenInfo, [FromQuery] GroupIdentityModel groupIdentity, [FromQuery] MessageRangeInfoModel rangeInfo)
{
var userContext = tokenRepository.ValidateToken(userRepository, tokenInfo.Token);
if (!groupRepository.IsMember(userContext.user.Uuid, groupIdentity.GroupId))
{
throw new AuthorizationException($"User {userContext.user.Uuid} isn't group member", "not a group member");
}
var ascendingOrder = rangeInfo.Ascending;
var offset = rangeInfo.Offset;
var limit = rangeInfo.Limit > MaxFetchLimit ? MaxFetchLimit : rangeInfo.Limit == 0 ? DefaultFetchLimit : rangeInfo.Limit;
var result = new List <MessageModel>();
var forward = rangeInfo.Direction >= 0;
if (rangeInfo.StartId == 0)
{
var range = messageRepository.SelectRange(groupIdentity.GroupId, offset, limit);
foreach (var messageData in (ascendingOrder ? range.Reverse() : range))
{
result.Add(MessageModel.Create(messageData));
}
}
else
{
var range =
forward ?
messageRepository.SelectMessagesAfterGiven(groupIdentity.GroupId, offset, limit, rangeInfo.StartId) :
messageRepository.SelectMessagesBeforeGiven(groupIdentity.GroupId, offset, limit, rangeInfo.StartId);
foreach (var messageData in (ascendingOrder ? range : range.Reverse()))
{
result.Add(MessageModel.Create(messageData));
}
}
return(result);
}