State Pattern -2

  • Behavioral pattern
  • The intent of this pattern is to allow an object to alter its behavior when its internal state changes. The object will appear to change its class.
  • Context:- defines the interface thats of interest to its clients. It maintains an instance of a ConcreteState subclass that defines the current state.
  • ConcreteState:- implements behavior associated with a state of the Context
  • State:- defines an interface for encapuslating the behavior asociated with a particular state of the context.
				
					namespace StatePattern
{
    public class SavingsBankAccount
    {
        private IState State { get; set; }

        private double BalanceInSavingAccount { get; set; }    

        public SavingsBankAccount()
        {
            State = new BasicCardElligibility();
        }

        public void Deposit(double amount)
        {
            BalanceInSavingAccount += amount;
            CheckCreditCardElligibility();
        }

        public void Withdraw(double amount)
        {
            BalanceInSavingAccount -= amount;
            CheckCreditCardElligibility();
        }

        public void CheckCurrentCreditCardBenefits()
        {
            State.Facilities();
        }
        public void CheckCreditCardElligibility()
        {
            if(BalanceInSavingAccount <= 5000)
                State = new BasicCardElligibility();
            if (BalanceInSavingAccount > 50000 && BalanceInSavingAccount < 100000)
                State = new SignatureCardElligibility();
            if (BalanceInSavingAccount >= 100000)
                State = new TitaniumCreditCardElligibility();
        }
    }

}

				
			
				
					
namespace StatePattern
{
    public interface IState
    {
        void Facilities();
    }

    public class BasicCardElligibility : IState
    {
        public void Facilities()
        {
            Console.WriteLine("Basic Card");
            Console.WriteLine("1 movie ticket free in 6 month");
        }
    }

    public class SignatureCardElligibility : IState
    {
        public void Facilities()
        {
            Console.WriteLine("Signature Card");
            Console.WriteLine("2 movie ticket free in 1 month");
        }
    }

    public class TitaniumCreditCardElligibility : IState
    {
        public void Facilities()
        {
            Console.WriteLine("Titaninum Card");
            Console.WriteLine("5 movie ticket free in 1 month");
        }
    }

}

				
			
				
					using StatePattern;

SavingsBankAccount savingsBankAccount = new();
savingsBankAccount.Deposit(1000);
savingsBankAccount.CheckCurrentCreditCardBenefits();

Console.WriteLine("---------------------");
savingsBankAccount.Deposit(50000);
savingsBankAccount.CheckCurrentCreditCardBenefits();
Console.WriteLine("---------------------");
savingsBankAccount.Deposit(60000);
savingsBankAccount.CheckCurrentCreditCardBenefits();
Console.WriteLine("---------------------");
savingsBankAccount.Withdraw(20000);
savingsBankAccount.CheckCurrentCreditCardBenefits();

Basic Card
1 movie ticket free in 6 month
———————
Signature Card
2 movie ticket free in 1 month
———————
Titaninum Card
5 movie ticket free in 1 month
———————
Signature Card
2 movie ticket free in 1 month

https://github.com/AnuragDaCoder/statepattern_one_more_example

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