using System;

//Types of Decorators

​

using System.Threading;

public abstract class Predicate_Class //1. Predicate Decorator

{

public abstract void BankRegister(); //Hidden Implementation

}

public class Predicate : Predicate_Class //Hidden Method Implementation

{

public override void BankRegister()

{

 Console.WriteLine("\nEnter The Name of the Account Holder : ");

string name = Console.ReadLine();

Console.WriteLine("\nEnter the Registered Bank Account Phone Number : ");

long phoneno = Convert.ToInt64(Console.ReadLine());

Console.WriteLine("\nEnter the last 4 digits of your Bank Account : ");

long lastdigits = Convert.ToInt64(Console.ReadLine());

Console.WriteLine("Enter your Registered Email ID : ");

string emailid = Console.ReadLine();

Console.WriteLine("\nSuccessful Registration and Updation to Database for Email ID " + emailid + " and Phone Number " + phoneno);

return;

 }

}

public class Branch_Decorator : Predicate //2. Branch Decorator

{

public void Branch()

{

long choice;

Predicate p = new Predicate();

Console.WriteLine("\nDo you really wish to register for our Online Banking Portal (1 for Yes/2 for No) ?");

choice = Convert.ToInt64(Console.ReadLine());

if (choice == '1')

{

p.BankRegister();

}

else if (choice == '2')

{

Console.WriteLine("\nThank you !! But you have chosen to not register with our Online Portal");

}

else

{

Console.WriteLine("\nINVALID CHOICE");

}

}

}

public class Lazy //3. Lazy Decorator and also acts as 6. Asynchronous Decorator

{

public void LazyMethod()

{

Predicate p = new Predicate();

p.BankRegister();

}

}

public class Logging //4. Logging Decorator

{

public void Log()

{

int count = 0;

Console.WriteLine("\nThe Online Banking Portal has been activated and is ready for the features such as New User Registration");

Console.WriteLine("\nWe urge all our customers to register and login with their respective credentials for availing essential online services");

Predicate p = new Predicate();

p.BankRegister();

count++;

Console.WriteLine("\n{0} user has now registered successfully into the Online Banking Portal");

}

}

public class Profiling //5. Profiling Decorator

{

public void Profile()

{

Console.WriteLine("\nThe Online Banking Portal has been activated and is ready for the features such as New User Registration");

Console.WriteLine("\n We urge all our customers to register and login with their respective credentials for availing essential online services");

DateTime start = DateTime.Now;

Thread.Sleep(5000);

 DateTime end = DateTime.Now;

 TimeSpan ts = (end - start);

 Console.WriteLine("Elapsed Time is {0} ms", ts.TotalMilliseconds);

}

}

public class MainProgram //Main CLASS implementing the 6 decorators

{

public static void Main()

{

long cho = 1;

do

{

Console.WriteLine("\nONLINE BANKING PORTAL - AT YOUR SERVICE (6 DECORATORS PROGRAM)");

Console.WriteLine("\n1. New User Registration (Predicate Decorator)\n2. New User Registration (Branch Decorator)\n3. New User Registration (Lazy Decorator)\n4. Updation of Registration (Logging Decorator)\n5. Checking the Time Elapsed (Profiling Decorator)\n6. New User Registration (Asynchronous Decorator)\n7. Exit");

long choice;

Console.WriteLine("\nEnter your required choice of displaying decorator function : ");

choice = Convert.ToInt64(Console.ReadLine());

switch(choice)

{

case 1: Predicate p = new Predicate();

p.BankRegister();

break;

case 2: Branch_Decorator bd = new Branch_Decorator();

bd.Branch();

break;

case 3: Lazy l = new Lazy();

l.LazyMethod();

break;

case 4: Logging lg = new Logging();

lg.Log();

break;

case 5: Profiling pg = new Profiling();

pg.Profile();

break;

case 6: Lazy ly = new Lazy();

ly.LazyMethod();

break;

case 7: Console.WriteLine("\nEXITING");

break;

default: Console.WriteLine("\nINVALID CHOICE");

break;

}

Console.WriteLine("Do you wish to Continue (1 for Yes/2 for No) ?");

 cho = Convert.ToInt64(Console.ReadLine());

}while(cho != '2');

}

}