//
// Summary:
// Connects a user to a given chat room by updating the chat room's active connection pool with the user's
// new connection. If the the user or chat room are not found or if the room is full, it raises an exception.
//
// Returns:
// ChatRoomConnectionPool - an updated chat room connection pool with the users new connection.
//
// Raises:
// ChatRoomIsFullException - the chat is full (risen by the chat room domain logic)
// ObjectDoesNotExistException - the chat room or the user were not found
// UserIsAlreadyConnectedException - the user is attempting to connect to a chat room in which he's already connected
public async Task <ChatRoomConnectionPool> AddUserToChatRoomConnectionPool(string chatRoomName, string userName, string connectionId)
{
var chatRoomConnectionPool = await GetChatRoomConnectionPool(chatRoomName);
var user = await _userService.GetUser(userName);
var chatRoomId = chatRoomConnectionPool.ChatRoomId;
var serverInstanceId = GlobalState.ServerInstanceId;
// domain logic to increment the chat room distributed connections
var updatedChatRoomConnectionPool = ChatRoomLogic.IncrementChatRoomConnectionPool(user.Id, serverInstanceId, connectionId, chatRoomConnectionPool);
await _redis.SetKey(chatRoomId, updatedChatRoomConnectionPool, null);
return(updatedChatRoomConnectionPool);
}
public async static Task <Tuple <ChatRoom, User, ChatRoomConnectionPool> > BuildScenarioWithChatRoomAndUserWithPreviousConnectionPool(string chatRoomName,
int activeConnectionsLimit, string userName, DBContext db, RedisContext redis)
{
var chatRoomConnectionPool = BuildChatRoomConnectionPoolWithFourUsers();
var newChatRoom = new ChatRoom
{
Id = chatRoomConnectionPool.ChatRoomId,
Name = chatRoomName,
ActiveConnectionsLimit = activeConnectionsLimit
};
var newUser = new User
{
Name = userName
};
// creates chat room with the same Id of the pool and a user
await db.ChatRooms.AddAsync(newChatRoom);
await db.Users.AddAsync(newUser);
await db.SaveChangesAsync();
// creates a connection pool for the chat room
await redis.SetKey(chatRoomConnectionPool.ChatRoomId, chatRoomConnectionPool, null);
return(new Tuple <ChatRoom, User, ChatRoomConnectionPool>(newChatRoom, newUser, chatRoomConnectionPool));
}