/// <summary>
/// Add user to list of online users and start to listen to him.
/// </summary>
/// <param name="user">user.</param>
public void AddUser(OnlineUser user)
{
if (user != null)
{
onlineUsers.Add(user);
// online notification to friends
string[] allFriends = DBoperations.GetFriends(user.Id);
string[] online_users = onlineUsers.Select(x => x.Login).ToArray();
string[] onlineFriends = allFriends.Where(x => online_users.Contains(x)).ToArray();
foreach (var login in onlineFriends)
{
OnlineUser friend = GetOnlineUser(login);
friend?.Client.SendMessage(new UserActionMessage
{
UserLogin = user.Login,
Action = UserActions.GoOnline
});
}
}
// listen this user
Task.Run(() => UserListener(user));
}
/// <summary>
/// Send array of friends to user.
/// </summary>
/// <param name="user">user.</param>
/// <exception cref="ConnectionInterruptedException"></exception>
private void SendFriends(OnlineUser user)
{
string[] allFriends = DBoperations.GetFriends(user.Id);
string[] online_users = onlineUsers.Select(x => x.Login).ToArray();
user.Client.SendMessage(new FriendsMessage
{
OnlineFriends = allFriends.Where(x => online_users.Contains(x)).ToArray(),
OfflineFriends = allFriends.Where(x => !online_users.Contains(x)).ToArray()
});
}
/// <summary>
/// Send array of all users to user.
/// </summary>
/// <param name="user">user.</param>
/// <exception cref="ConnectionInterruptedException"></exception>
private void SendAllUsers(OnlineUser user)
{
string[] allUsers = DBoperations.GetAllUsers();
string[] incomeRequests = DBoperations.GetIncomeFriendshipRequests(user.Id);
string[] outcomeRequests = DBoperations.GetOutcomeFriendshipRequests(user.Id);
string[] friends = DBoperations.GetFriends(user.Id);
string[] users = allUsers.Where(x =>
!incomeRequests.Contains(x) &
!outcomeRequests.Contains(x) &
!friends.Contains(x) &
x != user.Login).ToArray();
string[] online_users = onlineUsers.Select(x => x.Login).ToArray();
user.Client.SendMessage(new AllUsersMessage
{
OnlineUsers = users.Where(x => online_users.Contains(x)).ToArray(),
OfflineUsers = users.Where(x => !online_users.Contains(x)).ToArray()
});
}
/// <summary>
/// Log out user.
/// </summary>
/// <param name="user">user.</param>
private void Logout(OnlineUser user)
{
log.Info($"Client disconnected. ip {((IPEndPoint)user.Client.tcpClient.Client.RemoteEndPoint).Address.ToString()}");
string[] allFriends = DBoperations.GetFriends(user.Id);
string[] online_users = onlineUsers.Select(x => x.Login).ToArray();
string[] onlineFriends = allFriends.Where(x => online_users.Contains(x)).ToArray();
foreach (var login in onlineFriends)
{
OnlineUser friend = GetOnlineUser(login);
friend?.Client.SendMessage(new UserActionMessage
{
UserLogin = user.Login,
Action = UserActions.GoOffline
});
}
onlineUsers.Remove(user);
user.Dispose();
}
