//Register employee algorithm:
protected virtual void RegisterEmployee()
{
int numberOfPotentiallyRequestedEmployees;
string idUserCode;
List <Employee> potentialEmployees;
IEnumerable <Employee> employees = UI_RequestEmployeeNames(); // requesting name and surname parameters from user
if (employees == null) // Triggers when user cancels providing requested informations.
{
DialogBoxFactory.GetInfoBox("Rejestracja anulowana!").Show();
return;
}
numberOfPotentiallyRequestedEmployees = employees.Count();
switch ((numberOfPotentiallyRequestedEmployees))
{
case 0: // Triggers when requested employee wasn't found.
DialogBoxFactory.GetInfoBox("Rejestracja anulowana!\n\nPracownik nie istnieje w Bazie.").Show();
break;
case 1: // Triggers when exactly one record was found.
RegisteredEmployee.RegisterNewEmployee(employees.First(), DB_RequestEmployeesOwnedKeys(employees.First()));
break;
default: // Triggers when there are mor than one matching record - 2nd step verification.
idUserCode = UI_RequestId("Proszę podać numer identyfikacyjny Pracownika:"); // requesting an id parameter
if (idUserCode == null) // User resigned from providing employee id.
{
DialogBoxFactory.GetInfoBox("Rejestracja anulowana!").Show();
return;
}
potentialEmployees = employees.Where(e => e.Employee_Id == idUserCode).ToList();
if (potentialEmployees.Count == 0) // User provided wrong employee id.
{
DialogBoxFactory.GetInfoBox($"Nie znaleziono pracownika: {potentialEmployees[0].Name} {potentialEmployees[0]} o numerze ID: {idUserCode}.").Show();
return;
}
else if (potentialEmployees.Count > 1) // That's a scary situation. Somehow 2 identical "unique" ids was found. Well... that should not happend :) Unless someone do something bad in data base.
{
DialogBoxFactory.GetInfoBox("Wykryto poważny błąd bazy Danych: Duplikacja numeru identyfikacyjnego pracownika. Skontaktuj się ze swoim Administratorem.").Show();
return;
}
else // User provided a correct Id number.
{
RegisteredEmployee.RegisterNewEmployee(potentialEmployees[0], DB_RequestEmployeesOwnedKeys(potentialEmployees[0]));
}
break;
}
RaisePropertyChangedEvent(nameof(RegisteredEmployee)); // Informing the view.
}
// Method finding particular key specified by user:
protected virtual void ShowSpecifiedKey()
{
DialogBoxFactory dialogFactory = new DialogBoxFactory();
RequestDialogBox dialogBox;
RoomKey key;
string id;
// dialog box building part:
dialogFactory.HeaderMessage = "Proszę podać numer szukanego klucza.";
dialogFactory.RequestedParameters = new List <string>()
{
"Numer Identyfikacyjny"
};
dialogFactory.DefaultValuesForRequestedParameters = new List <string>();
dialogFactory.CorrespondingRules = new List <ValidationRules> {
ValidationRules.StringTyped4DigitCode
};
dialogBox = dialogFactory.GetRequestDialogBox();
// dialog box handling part:
if ((bool)dialogBox.ShowDialog())
{
id = dialogBox[0];
}
else
{
return;
}
// data access part
try
{
key = _queryProvider.GetRoomKeyByIdAsync(id).Result;
}
catch (Exception e)
{
SendTabNotification(new TabNotificationSentEventArgs()
{
Message = e.Message
});
return;
}
// data validation part:
if (key == null)
{
DialogBoxFactory.GetInfoBox($"Brak wyników. Klucz o numerze: {id} nie istnieje w Bazie.").Show();
ResetKeysCollection();
}
else
{
ResetKeysCollection(new List <RoomKey>()
{
key
});
}
ResetPresentedDetail();
}
// Handover room key procedure algorithm:
protected virtual void HandoverTheKey()
{
RoomKey searchedKey;
string requestedKeyId = UI_RequestId("Proszę podać numer klucza:"); // requesting an id parameter
if (requestedKeyId == null) // Triggers when user cancels providing requested informations.
{
DialogBoxFactory.GetInfoBox("Procedura anulowana!").Show();
return;
}
try // potential exception handler
{
searchedKey = _dataQueryProvider.GetRoomKeyByIdAsync(requestedKeyId).Result;
}
catch (Exception e)
{
SendTabNotification(new TabNotificationSentEventArgs()
{
Message = e.Message
});
return;
}
if (searchedKey == null) // Triggers when user provided wrong key id.
{
DialogBoxFactory.GetInfoBox("Klucz nie został odnaleziony w Bazie.").Show();
return;
}
else if (searchedKey.AssignedEmployee_Id != null) // Triggers when user provided id of key which was already handovered.
{
DialogBoxFactory.GetInfoBox("Klucz został już wydany innemu pracownikowi.").Show();
return;
}
else // Triggers when user provided correct key id and key was found on gatehouse.
{
try // potential exception handler
{
_dataCommandProvider.HandOverTheRoomKeyToEmployeeAsync(searchedKey, RegisteredEmployee.GetRegisteredEmployee()).Wait();
}
catch (Exception e)
{
SendTabNotification(new TabNotificationSentEventArgs()
{
Message = e.Message
});
return;
}
DialogBoxFactory.GetInfoBox("Wydano klucz!").Show(); // Handover key operation confirmation.
}
RegisteredEmployee.RefreshHeldKeys(DB_RequestEmployeesOwnedKeys(RegisteredEmployee.GetRegisteredEmployee())); // Refresh information about taken keys by registered employee.
RaisePropertyChangedEvent(nameof(RegisteredEmployee)); // Informing the view.
}
// Retrieving key algorithm:
protected virtual void TakeTheKeyBack()
{
string requestedKeyId = UI_RequestId("Proszę podać numer klucza:"); // Requesting the retrieved key id number.
if (requestedKeyId == null) // Triggers when user cancels providing requested informations.
{
DialogBoxFactory.GetInfoBox("Procedura anulowana!").Show();
return;
}
List <RoomKey> searchedKeys = RegisteredEmployee.HeldKeys.Where(hk => hk.RoomKey_Id == requestedKeyId).ToList();
if (searchedKeys.Count == 0) // Situation where provided key wasnt previously handovered to registered employee OR id doesn't exist in database. Any way the registered employee isn't allowed to return provided key.
{
DialogBoxFactory.GetInfoBox($"Pracownik nie jest uprawniony do zwrotu klucza nr:\n{requestedKeyId}").Show();
return;
}
else if (searchedKeys.Count == 1) // Everything it's ok and employee may return key.
{
try // potential exception handler
{
_dataCommandProvider.TakeTheRoomKeyAsync(searchedKeys[0]).Wait();
}
catch (Exception e)
{
SendTabNotification(new TabNotificationSentEventArgs()
{
Message = e.Message
});
return;
}
DialogBoxFactory.GetInfoBox("Przyjęto klucz!").Show(); // Returning key fact confirmation.
}
else // That's a scary situation. Somehow 2 identical "unique" ids was found. Well... that should not happend :) Better call dBase Admin.
{
DialogBoxFactory.GetInfoBox("Wykryto poważny błąd bazy Danych: Duplikacja numeru identyfikacyjnego klucza. Skontaktuj się ze swoim Administratorem.").Show();
return;
}
RegisteredEmployee.RefreshHeldKeys(DB_RequestEmployeesOwnedKeys(RegisteredEmployee.GetRegisteredEmployee())); // Refresh information about taken keys by registered employee.
RaisePropertyChangedEvent(nameof(RegisteredEmployee)); // Informing the view.
}
// Because of fact that id numbers are considered as unique, and a fact that implemented shallow validation doesn't allow for save/update record with redundant id. This algorithm returns first unused id number to use in CU operations.
protected virtual string GenerateFirstAvailable4DigitCode()
{
List <int> rawIds = _records.Select(r => r.GetIdNumber()).OrderBy(i => i).ToList();
string code = "EORE";
int counter = 0;
for (int i = 0; i < 10000; i++)
{
if (counter < rawIds.Count && i == rawIds[counter])
{
counter++;
}
else
{
code = i.ConvertToFourDigitStringCode();
break;
}
}
DialogBoxFactory.GetInfoBox("Błąd Krytyczny:\nPrzekroczono limit bazy danych. Skontaktuj się ze swoim Administratorem."); // that will happen if you try to overload a data base and save to it 10000 records and then add a one more :)
return(code);
}
// Method showing only keys that remain on the gatehouse:
protected virtual void ShowRemainingRoomKeys()
{
IEnumerable <RoomKey> results;
try
{
results = _queryProvider.GetAvailableRoomKeysAsync().Result;
}
catch (Exception e)
{
SendTabNotification(new TabNotificationSentEventArgs()
{
Message = e.Message
});
return;
}
if (results.Count() == 0)
{
DialogBoxFactory.GetInfoBox("Kolekcja jest pusta. Wszystkie klucze zostały wydane.").Show();
}
ResetKeysCollection(results);
ResetPresentedDetail();
}
// Method showing only currently handovered keys:
protected virtual void ShowHandoveredRoomKeys()
{
IEnumerable <RoomKey> results;
try
{
results = _queryProvider.GetHandoveredRoomKeysAsync().Result;
}
catch (Exception e)
{
SendTabNotification(new TabNotificationSentEventArgs()
{
Message = e.Message
});
return;
}
if (results.Count() == 0)
{
DialogBoxFactory.GetInfoBox("Kolekcja jest pusta. Nie wydano żadnego klucza.").Show();
}
ResetKeysCollection(results);
ResetPresentedDetail();
}
// Method showing all keys in data base:
protected virtual void ShowAllRoomKeys()
{
IEnumerable <RoomKey> results;
try
{
results = _queryProvider.GetAllRoomKeysAsync().Result;
}
catch (Exception e)
{
SendTabNotification(new TabNotificationSentEventArgs()
{
Message = e.Message
});
return;
}
if (results.Count() == 0)
{
DialogBoxFactory.GetInfoBox("Kolekcja jest pusta. Proszę skontaktować się z Administratorem bazy danych.").Show();
}
ResetKeysCollection(results);
ResetPresentedDetail();
}