/// <summary>
/// Handle a LoginRequest package
/// </summary>
/// <param name="loginRequest">LoginRequest to handle</param>
/// <param name="clientAddress">address of the sender of the package</param>
/// <returns>the feedback transmitted</returns>
private static void HandlePackage(LoginRequest loginRequest, string clientAddress)
{
Feedback feedback = null;
if (!SDBController.TryVerifyUser(loginRequest.Email, loginRequest.PasswordHash, out bool result))
{
feedback = new Feedback(FeedbackCode.InternalServerError);
}
else
{
if (result)
{
if (SDBController.TryUpdateClientLastIPAddress(loginRequest.Email, clientAddress))
{
feedback = new Feedback(FeedbackCode.LoginAccepted);
}
else
{
feedback = new Feedback(FeedbackCode.InternalServerError);
}
}
else
{
feedback = new Feedback(FeedbackCode.LoginDenied);
}
}
if (feedback.FeedbackCode == FeedbackCode.LoginAccepted)
{
if (!SDBController.TryGetClientList(out List <User> userList))
{
feedback = new Feedback(FeedbackCode.InternalServerError);
}
else
{
if (!SDBController.TryGetMessageList(loginRequest.Email, out List <MessagePackage> list))
{
feedback = new Feedback(FeedbackCode.InternalServerError);
}
else
{
UserList userListPackage = new UserList(userList);
SConnectionController.SendPackage(userListPackage, clientAddress);
MessageList messageList = new MessageList(list);
SConnectionController.SendPackage(messageList, clientAddress);
SDBController.TryUpdateSendTime(loginRequest.Email);
return;
}
}
}
SConnectionController.SendPackage(feedback, clientAddress);
}
private static void HandlePackage(SendTextMessage sendTextMessage, string clientAddress)
{
DateTime?sendTime;
if (!SDBController.ConnectionAvailable())
{
SConnectionController.SendPackage(new Feedback(FeedbackCode.MessageSendFailed), clientAddress);
return;
}
if (!SDBController.TryGetUser(clientAddress, out User user))
{
SConnectionController.SendPackage(new Feedback(FeedbackCode.InvalidSession), clientAddress);
return;
}
if (!SDBController.TryGetIPAddressByEmail(sendTextMessage.EMail, out string ipAddress))
{
sendTime = null;
}
else
{
if (string.IsNullOrEmpty(ipAddress))
{
sendTime = null;
}
else
{
if (SConnectionController.SendPackage(new ReceiveTextMessage(sendTextMessage.EMail, sendTextMessage.Text), ipAddress))
{
sendTime = DateTime.Now;
}
else
{
sendTime = null;
}
}
}
if (SDBController.TryAddMessage(user.Email, sendTextMessage.EMail, sendTextMessage.Text, sendTime))
{
SConnectionController.SendPackage(new Feedback(FeedbackCode.MessageSendSuccess), clientAddress);
}
else
{
SConnectionController.SendPackage(new Feedback(FeedbackCode.MessageSendFailed), clientAddress);
}
}
static void Main(string[] args)
{
WriteLine("Willkommen bei REEChat Server!");
WriteLine("Überprüfung der Datenbankverbindung...");
//checks whether a database connection can be created
while (!SDBController.ConnectionAvailable())
{
WriteLine("Datenbankverbindung fehlgeschlagen.\nErneuter Versuch in 10 Sekunden");
Thread.Sleep(10 * 1000);
}
WriteLine("Datenbankverbindung erfolgreich!");
WriteLine("Server wird initialisiert...");
SConnectionController.Init();
WriteLine("Server wird gestartet...");
//Trying to start the listener
try
{
SConnectionController.Listener.Start(10);
}
catch (SocketException)
{
WriteLine("Server kann nicht gestartet werden. Der Port [" + ConnectionConfig.serverPort + "] wird bereits verwendet.");
WriteLine("Mögliche Ursache dafür ist, dass bereits ein REEChat Server auf diesem Gerät läuft!");
WriteLine("Beliebige Taste drücken zum Schließen...");
Console.ReadKey();
return;
}
SConnectionController.ThreadListener.Start();
WriteLine("Server erfolgreich gestartet!\n");
while (true)
{
}
}
/// <summary>
/// Handle a RegistrationRequest
/// </summary>
/// <param name="request">RegistrationRequest to handle</param>
/// <param name="clientAddress">address of the sender of the package</param>
/// <returns>the feedback transmitted</returns>
private static void HandlePackage(RegistrationRequest request, string clientAddress)
{
Feedback feedback = null;
if (!CheckRegistrationRequest(request))
{
feedback = new Feedback(FeedbackCode.RegistrationDenied);
}
else
{
switch (SDBController.TryAddClient(request))
{
case 0:
feedback = new Feedback(FeedbackCode.RegistrationAccepted);
SDBController.TryGetAllIpAddresses(out List <string> addressList);
SDBController.TryGetClientList(out List <User> userList);
foreach (string address in addressList)
{
if (address != clientAddress)
{
SConnectionController.SendPackage(new UserList(userList), address);
}
}
break;
case 1:
feedback = new Feedback(FeedbackCode.InternalServerError);
break;
case 2:
feedback = new Feedback(FeedbackCode.RegistrationDeniedEmailAlreadyUsed);
break;
}
}
SConnectionController.SendPackage(feedback, clientAddress);
}
