private static MemberCollection instance; // the instance is made of this class and object is made with the help of this
public static MemberCollection getInstance() // this function returns the instance of the class or the object
{
if (instance == null)
{
instance = new MemberCollection();
}
return(instance);
}
static void Main(string[] args)
{
int userMainMenuChoice; // this variable is used to store the choice entered by the user
while (true) // infinte loop till the user press 0 it will run
{
Console.WriteLine("Welcome to the Community Library");
Console.WriteLine("===========Main Menu============");
Console.WriteLine("1. Staff Login");
Console.WriteLine("2. Member Login");
Console.WriteLine("0. Exit");
Console.WriteLine("================================");
Console.WriteLine();
Console.WriteLine("Please make a selection (1-2, or 0 to exit):");
try
{
userMainMenuChoice = Convert.ToInt32(Console.ReadLine());// taking the user input
switch (userMainMenuChoice)
{
case 1: // if 1 is pressed by user
Console.WriteLine("Enter the username");
string staffUserName = Console.ReadLine();
if (staffUserName == "staff") // checking if the username entered by the user is correct
{
Console.WriteLine("Enter the password");
string staffPassword = Console.ReadLine();
if (staffPassword == "today123") // checking if the password entered by the user is correct
{
Staff s = new Staff(); // making the object of class Staff
s.menu(); // calling the menu function of class staff using object s
}
else
{
Console.WriteLine("Wrong password entered");
}
}
else
{
Console.WriteLine("Wrong username");
}
break;
case 2: // if 2 is enterd by user
MemberCollection memberCollection = MemberCollection.getInstance(); // getting the instance of class member function
Console.WriteLine("Enter the userName");
string userName = Console.ReadLine();
bool checkUserName = memberCollection.findUserName(userName); // checking if the user name enterd by the user in correct
if (checkUserName == true)
{
Console.WriteLine("Enter the password");
string password = Console.ReadLine();
Regex reg = new Regex(@"^[0-9]{4}$");
if (reg.IsMatch(password)) // checking if the password enterd is a 4 digit integer
{
bool checkPassword = memberCollection.checkPassword(userName, password); // cheking if the passowrd entered by the user corresponding to the user name is correct
if (checkPassword == true)
{
int index = memberCollection.getIndex(userName, password); // getting the index of the member of corresponding username and password
memberCollection.menu(index); // showing the menu of the corresponding member
}
else
{
Console.WriteLine("Wrong Password");
}
}
else
{
Console.WriteLine("Enter four digit int only");
}
}
else
{
Console.WriteLine("Worng user name entered");
}
break;
case 0:
System.Environment.Exit(0);
break;
default:
Console.WriteLine("Wrong input");
break;
}
}
catch (FormatException)
{
Console.WriteLine("Error: Enter only integer values");
}
}
}