//Function to delete Guest
public static bool DeleteGuest(int GuestID)
{
bool GuestDeleted = true;
Guest GuestToBeDeleted = null;
try
{
//Search Guest in the records
GuestToBeDeleted = GuestOperations.SearchGuest(GuestID);
//If Guest is not null delete Guest otherwise raise exception
if (GuestToBeDeleted != null)
{
GuestDeleted = GuestOperations.DeleteGuest(GuestToBeDeleted);
}
else
{
GuestDeleted = false;
throw new GuestPhoneBookException("Guest Info does not exists to delete");
}
}
catch (GuestPhoneBookException p)
{
throw;
}
catch (SystemException e)
{
Console.WriteLine(e.Message);
}
return(GuestDeleted);
}
//Function to display all Guest details
public static List <Guest> DisplayGuest()
{
List <Guest> guestList = null;
try
{
guestList = GuestOperations.DisplayGuestFromFile();
//Check guest list is empty or not, if it is then raise exception
if (guestList == null)
{
throw new GuestPhoneBookException("Guest List is Empty!");
}
}
catch (GuestPhoneBookException p)
{
throw;
}
catch (SystemException e)
{
Console.WriteLine(e.Message);
}
return(guestList);
}
//Function to search Guest Info using Guest ID
public static Guest SearchGuest(int GuestID)
{
Guest guestSearched = null;
try
{
//Searching Guest
guestSearched = GuestOperations.SearchGuest(GuestID);
//If searched guest is null raise exception
if (guestSearched == null)
{
throw new GuestPhoneBookException("Guest Info does not exist!");
}
}
catch (GuestPhoneBookException p)
{
throw;
}
catch (SystemException e)
{
Console.WriteLine(e.Message);
}
return(guestSearched);
}
public static bool AddGuest(Guest newGuest)
{
bool guestAdded = false;
try
{
if (ValidateGuest(newGuest))
{
guestAdded = GuestOperations.AddGuest(newGuest);
}
}
catch (GuestPhoneBookException)
{
throw;
}
catch (System.Exception ex)
{
throw ex;
}
return(guestAdded);
}
//Function to update Guest
public static bool UpdateGuest(Guest guestToBeUpdated)
{
bool guestUpdated = true;
try
{
//Searching Guest, if found update or raise exception
if (GuestOperations.SearchGuest(guestToBeUpdated.GuestID) != null)
{
//validating Guest, if valid update o.w. raise exception
if (ValidateGuest(guestToBeUpdated))
{
guestUpdated = GuestOperations.Updateguest(guestToBeUpdated);
}
else
{
guestUpdated = false;
throw new GuestPhoneBookException("Guest Info is not updated because it is not valid!");
}
}
else
{
guestUpdated = false;
throw new GuestPhoneBookException("Guest id not exists for update!");
}
}
catch (GuestPhoneBookException e)
{
throw;
}
catch (SystemException e)
{
Console.WriteLine(e.Message);
}
return(guestUpdated);
}
public static List <Guest> ReturnGuestInformation()
{
return(GuestOperations.ReturnGuestInformation());
}
public static List <Guest> DisplayFromFile()
{
List <Guest> guestlist = GuestOperations.DisplayGuestFromFile();
return(guestlist);
}
public static void SerializeData()
{
GuestOperations.SerializeData();
}
