internal static void Command()
{
Console.WriteLine("Command pattern demo");
Console.WriteLine("------------------------------------");
var modifyPrice = new ModifyPrice();
var product = new Product("IPhone", 25000);
var productCommand = new ProductCommand(product, PriceAction.Increase, 1000);
modifyPrice.SetCommand(productCommand);
modifyPrice.Invoke();
Console.WriteLine(product);
var productCommand2 = new ProductCommand(product, PriceAction.Decrease, 500);
modifyPrice.SetCommand(productCommand2);
modifyPrice.Invoke();
Console.WriteLine(product);
modifyPrice.Undo();
Console.WriteLine(product);
Console.WriteLine("");
Console.WriteLine("------------------------------------");
Console.WriteLine("Command pattern demo 2");
Console.WriteLine("------------------------------------");
var bank = new BankAccount();
var cmd = new BankCommand();
bank.Balance = 90000;
Console.WriteLine($"Balance: {bank.Balance}");
cmd.Amount = 1000;
Console.WriteLine($"Deposit: {cmd.Amount}");
cmd.BalanceAction = _4_Behavioral_Patterns.Command.Demo2.Action.Deposit;
bank.Execute(cmd);
cmd.Amount = 2000;
Console.WriteLine($"Deposit: {cmd.Amount}");
cmd.BalanceAction = _4_Behavioral_Patterns.Command.Demo2.Action.Deposit;
bank.Execute(cmd);
cmd.Amount = 8000;
Console.WriteLine($"Withdraw: {cmd.Amount}");
cmd.BalanceAction = _4_Behavioral_Patterns.Command.Demo2.Action.Withdraw;
bank.Execute(cmd);
cmd.Amount = 100000;
Console.WriteLine($"Withdraw: {cmd.Amount}");
cmd.BalanceAction = _4_Behavioral_Patterns.Command.Demo2.Action.Withdraw;
bank.Execute(cmd);
Console.WriteLine($"Balance: {bank.Balance}");
}
public void Should_Decrease_Price()
{
ModifyPrice modifyPriceInvolker = new ModifyPrice();
var product = new Product("Phone", 500);
modifyPriceInvolker.AddCommand(new ProductCommand(product, PriceAction.Decrease, 100));
modifyPriceInvolker.AddCommand(new ProductCommand(product, PriceAction.Decrease, 200));
modifyPriceInvolker.Invoke();
product.ToString().Should().Be("Current price for the Phone product is 200$.");
}
static void Main(string[] args)
{
var modifyPrice = new ModifyPrice();
var product = new Product("Phone", 500);
Execute(product, modifyPrice, new ProductCommand(product, PriceAction.Increase, 100));
Execute(product, modifyPrice, new ProductCommand(product, PriceAction.Increase, 50));
Execute(product, modifyPrice, new ProductCommand(product, PriceAction.Increase, 25));
Console.WriteLine(product);
}
static void Main(string[] args)
{
var random = new Random();
// ********* Builder(Fluent) Pattern Usage: START *********
// creating dummy data for products simulation
int capacity = 3;
var products = new List <Product>(capacity);
for (int i = 1; i <= capacity; i++)
{
products.Add(
new Product
{
Id = Guid.NewGuid(),
Name = $"Product {i}",
Price = Math.Round(random.NextDouble() * 100, 2),
NumberInStock = random.Next(100)
});
}
// creation of builder is mandatory. because we use it when we create manager for report builder
var builder = new ProductStockReportBuilder(products);
var manager = new ProductStockReportManager(builder);
// report is generated by manager
manager.BuildReport();
var productsReport = builder.GetReport();
Console.WriteLine(productsReport);
// ********* Builder(Fluent) Pattern Usage: END *********
// -------------------------------------------------------------------------
// ********* Fluent Builder Interface with Recursive Generics Pattern Usage: START *********
var emp = EmployeeBuilderManager.NewEmployee
.WithFirstName("Nuran").WithLastName("Tarlan").WithAge(18)
.WithEMail("*****@*****.**")
.WithMainPhone("xxx-xxx-xx-xx").WithBackupPhone("xxx-xxx-xx-xx")
.AtPosition(Positions.FullStackDeveloper).WithSalary(500).Build();
Console.WriteLine(emp);
// ********* Fluent Builder Interface with Recursive Generics Pattern Usage: END *********
// -------------------------------------------------------------------------
// ********* Faceted Builder Pattern Usage: START
var car = new CarBuilderFacade()
.Info.WithBrand(CarBrands.Subaru).WithModel("Impreza").CreatedAt(2003).WithDistance(186522.5)
.Engine.WithEngine(1800).WithHorsePower(422).WithTorque(600)
.Trade.WithPrice(18000.0m).IsSecondHand(true)
.Address.InCity("Baku").InDealer("Subaru XXXXX-XX")
.Build();
Console.WriteLine(car);
// ********* Faceted Builder Pattern Usage: END
// -------------------------------------------------------------------------
// ********* Factory Method Pattern Usage: START
AirConditioner.InitializeFactories()
.ExecuteCreation(Actions.Cooling, 20.2)
.Operate();
// ********* Factory Method Pattern Usage: END
// -------------------------------------------------------------------------
Console.WriteLine("\n-------------------------------\n");
// ********* Singleton Pattern Usage: START
var db1 = SingletonDataContainer.GetInstance;
Console.WriteLine($"Population of Sumqayit: {db1.GetPopulation("Sumqayit")}");
var db2 = SingletonDataContainer.GetInstance;
Console.WriteLine($"Baku: {db2.GetPopulation("Baku")} people");
// ********* Singleton Pattern Usage: END
// -------------------------------------------------------------------------
Console.WriteLine("\n-------------------------------\n");
// ********* Adapter Pattern Usage: START
var xmlConverter = new CustomXmlConverter();
var adapter = new XmlToJsonAdapter(xmlConverter);
adapter.ConvertXmlToJson();
// ********* Adapter Pattern Usage: END
// -------------------------------------------------------------------------
Console.WriteLine("\n-------------------------------\n");
// ********* Composite Pattern Usage: START
// single gift
var phone = new SingleGift("Phone", 500);
phone.CalculateTotalPrice();
Console.WriteLine();
// composite many gifts together
var rootBox = new CompositeGift("Surprise Box for Teenagers", true);
var truckToy = new SingleGift("Truck Toy", 220);
var plainToy = new SingleGift("Plain Toy", 89);
rootBox.Add(truckToy);
rootBox.Add(plainToy);
var childBox = new CompositeGift("Surprise Box for Children", false);
var soldierToy = new SingleGift("Soldier Toy", 15);
childBox.Add(soldierToy);
rootBox.Add(childBox);
rootBox.CalculateTotalPrice();
// ********* Composite Pattern Usage: END
// -------------------------------------------------------------------------
Console.WriteLine("\n-------------------------------\n");
// ********* Decorator Pattern Usage: START
var regularOrder = new RegularOrder();
Console.WriteLine(regularOrder.CalculateTotalOrderPrice() + "\n");
var preOrder = new PreOrder();
Console.WriteLine(preOrder.CalculateTotalOrderPrice() + "\n");
var premiumPreOrder = new PremiumPreOrder(preOrder);
Console.WriteLine(premiumPreOrder.CalculateTotalOrderPrice());
// ********* Decorator Pattern Usage: END
// -------------------------------------------------------------------------
Console.WriteLine("\n-------------------------------\n");
// ********* Command Pattern Usage: START
var modifyPrice = new ModifyPrice();
var product = new Product2("Phone", 500);
modifyPrice.Execute(new ProductCommand(product, PriceAction.Increase, 100));
modifyPrice.Execute(new ProductCommand(product, PriceAction.Decrease, 700));
modifyPrice.Execute(new ProductCommand(product, PriceAction.Decrease, 20));
Console.WriteLine(product);
modifyPrice.UndoActions();
Console.WriteLine(product);
// ********* Command Pattern Usage: END
// -------------------------------------------------------------------------
Console.WriteLine("\n-------------------------------\n");
// ********* Strategy Pattern Usage: START
var reports = new List <DeveloperReport>
{
new DeveloperReport {
Id = 1, Name = "Dev1", Level = DeveloperLevel.Senior, HourlyRate = 30.5, WorkingHours = 160
},
new DeveloperReport {
Id = 2, Name = "Dev2", Level = DeveloperLevel.Junior, HourlyRate = 20, WorkingHours = 120
},
new DeveloperReport {
Id = 3, Name = "Dev3", Level = DeveloperLevel.Senior, HourlyRate = 32.5, WorkingHours = 130
},
new DeveloperReport {
Id = 4, Name = "Dev4", Level = DeveloperLevel.Junior, HourlyRate = 24.5, WorkingHours = 140
}
};
var calculatorContext = new SalaryCalculator(new JuniorDeveloperSalaryCalculator());
var juniorTotal = calculatorContext.Calculate(reports);
Console.WriteLine($"Total amount for junior salaries is: {juniorTotal}");
calculatorContext.SetCalculator(new SeniorDeveloperSalaryCalculator());
var seniorTotal = calculatorContext.Calculate(reports);
Console.WriteLine($"Total amount for senior salaries is: {seniorTotal}");
Console.WriteLine($"Total cost for all the salaries is: {juniorTotal + seniorTotal}");
// ********* Strategy Pattern Usage: END
// -------------------------------------------------------------------------
Console.WriteLine("\n-------------------------------\n");
// ********* Facade Pattern Usage: START
var facade = new Facade.Facade();
var chickenOrder = new Order()
{
DishName = "Chicken with rice", DishPrice = 20.0, User = "******", ShippingAddress = "Random street 123"
};
var sushiOrder = new Order()
{
DishName = "Sushi", DishPrice = 52.0, User = "******", ShippingAddress = "More random street 321"
};
facade.OrderFood(new List <Order> {
chickenOrder, sushiOrder
});
// ********* Facade Pattern Usage: END
// -------------------------------------------------------------------------
Console.WriteLine("\n-------------------------------\n");
// ********* Prototype Pattern Usage: START
var grid = new List <IBlock>();
grid.AddRange(new List <IBlock>
{
BlockFactory.Create("Hello, world!"),
BlockFactory.Create("3"),
BlockFactory.Create("16/05/2002"), // datetime
BlockFactory.Create("08/22/2021") // string, because 12 month exist in calendar
});
foreach (var block in grid)
{
Console.WriteLine(block);
}
var block5 = (DateTimeBlock)grid[2].Clone();
block5.Format = "MM/dd/yyyy";
grid.Add(block5);
Console.WriteLine("\nblock5 is added...");
Console.WriteLine(block5);
var block6 = (DateTimeBlock)grid[4].Clone();
block6.DateTime = DateTime.UtcNow;
grid.Add(block6);
Console.WriteLine("\nblock6 is added...");
Console.WriteLine(block6);
// ********* Prototype Pattern Usage: END
// -------------------------------------------------------------------------
Console.WriteLine("\n-------------------------------\n");
// ********* Protection-Proxy Pattern Usage: START
var settings = new Settings("settings config");
Console.WriteLine(settings.GetConfig());
var authService = new AuthService();
var protectedSettings = new ProtectedSettings(authService);
Console.WriteLine(protectedSettings.GetConfig());
// ********* Protection-Proxy Pattern Usage: END
// ********* Iterator Pattern Usage: START
var numbers = new CustomLinkedList <int>(1);
for (int i = 2; i < 8; i++)
{
numbers.Add(i);
}
var iterator = numbers.Iterator;
while (!iterator.Complete)
{
Console.WriteLine(iterator.Next());
}
// Exception will be thrown
// Console.WriteLine(iterator.Next());
// ********* Iterator Pattern Usage: END
}
public static void Execute(Product product, ModifyPrice modifyPrice, ICommand productCommand)
{
modifyPrice.SetCommand(productCommand);
modifyPrice.Invoke();
}
static void Main(string[] args)
{
#region Creational Patterns
//Singleton
Singleton singleton = Singleton.GetInstance();
singleton.someUsefulCode();
Separate();
//Builder
Item ciastko = new ItemBuilder(0).SetName("Ciastko").SetType("Food").build();
Console.WriteLine($"{ciastko.id}. {ciastko.name}, {ciastko.type}");
Separate();
//Prototype
Person person = new Person(1, 15, "John");
Person shallowCopy = (Person)person.ShallowCopy();
Person deepCopy = (Person)person.DeepCopy();
Console.WriteLine(person);
Console.WriteLine(shallowCopy);
Console.WriteLine(deepCopy);
person.name = "Max";
person.age = 20;
person.id = new IdInfo(99);
Console.WriteLine(person);
Console.WriteLine(shallowCopy);
Console.WriteLine(deepCopy);
Separate();
//AbstractFactory
Car miniCar = CarFactory.CarBuilder(CarType.MINI);
Car lumiCar = CarFactory.CarBuilder(CarType.LUXURY);
Separate();
//FactoryPattern
ShapeFactory shapeFactory = new ShapeFactory();
Shape circle = shapeFactory.GetShape("circle");
circle.print();
Separate();
//ObjectPool
SomeObject so1 = Pool.GetObject();
SomeObject so2 = Pool.GetObject();
Pool.ReleaseObject(so1);
SomeObject so3 = Pool.GetObject();
Console.WriteLine($"so1: {so1}");
Console.WriteLine($"so2: {so2}");
Console.WriteLine($"so3: {so3}");
Separate();
#endregion
#region Structural Patterns
//Adapter
OldClass oldClass = new OldClass();
IWrite write = new Adapter(oldClass);
write.PrintMessage();
Separate();
//Bridge
Thing triangle = new Ball(new Blue());
triangle.print();
Separate();
//Composite
Component leaf1 = new Leaf("leaf1");
Component leaf2 = new Leaf("leaf2");
Component leaf3 = new Leaf("leaf3");
Component branch1 = new Composite("branch1");
branch1.Add(leaf1);
branch1.Add(leaf2);
Component root = new Composite("root");
root.Add(branch1);
root.Add(leaf3);
root.Display(1);
Separate();
//Decorator
Weapon weapon = new BaseWeapon();
weapon.shot();
Weapon modifiedWeapon = new Stock(weapon);
modifiedWeapon.shot();
Separate();
//Facade
Student student = new Student();
student.StartLearning();
student.EndLearning();
Separate();
//Flyweight
Particle p1 = ParticleFactory.getSmallParticle("red"); //new key
Particle p2 = ParticleFactory.getSmallParticle("red"); //no new one
Particle p3 = ParticleFactory.getSmallParticle("blue"); //new key
Separate();
//Proxy
IBank proxyBank = new ProxyBank();
proxyBank.Pay();
Separate();
#endregion
#region Behavioral Patterns
//ChainOfResponsibility
Chain chain = new Chain();
chain.Process(5);
Separate();
//Command
var modifyPrice = new ModifyPrice();
var product = new Product("Brick", 200);
Console.WriteLine(product);
modifyPrice.SetCommandAndInvoke(new ProductCommand(product, PriceAction.Increase, 50));
Console.WriteLine(product);
Separate();
//Iterator
CarRepository carRepository = new CarRepository(new string[] { "Renault", "BMW", "VW" });
for (IIterator i = carRepository.GetIterator(); i.hasNext();)
{
Console.WriteLine($"Car: {i.next()}");
}
Separate();
//Mediator
Mediator mediator = new RealMediator();
APerson jhon = new RealPerson(mediator, "Jhon");
APerson max = new RealPerson(mediator, "Max");
APerson emma = new RealPerson(mediator, "Emma");
mediator.AddPerson(jhon);
mediator.AddPerson(max);
mediator.AddPerson(emma);
jhon.Send("I'm a jhon and this is my message! ");
emma.Send("henlo");
Separate();
//Memento
Localization localization = new Localization("NY", 123, 111);
LocalizationSnapshot snapshot = localization.CreateSnapshot();
Console.WriteLine(localization);
localization.City = "Berlin";
localization.X = 999;
Console.WriteLine(localization);
snapshot.Restore();
Console.WriteLine(localization);
Separate();
//Observer
Customer james = new Customer("James");
Customer william = new Customer("William");
Customer evelyn = new Customer("Evelyn");
Shop grocery = new Shop("YourFood");
Shop DIYshop = new Shop("Tooler");
grocery.AddSubscriber(james);
grocery.AddSubscriber(william);
grocery.AddSubscriber(evelyn);
DIYshop.AddSubscriber(james);
DIYshop.AddSubscriber(william);
grocery.AddMerchandise(new Merchandise("pizza", 19));
DIYshop.AddMerchandise(new Merchandise("hammer", 399));
Separate();
//State
AudioPlayer ap = new AudioPlayer();
ap.ClickPlay();
ap.ClickLock();
ap.ClickPlay();
ap.ClickPlay();
ap.ClickPlay();
ap.ClickLock();
ap.NextSong();
ap.PreviousSong();
Separate();
//Strategy
Calculator calculator = new Calculator(new AddingStrategy());
calculator.Calculate(5, 2);
calculator.ChangeStrategy(new SubtractingStrategy());
calculator.Calculate(5, 2);
Separate();
//TemplateMethod
Algorithm a1 = new AlgorithmWithStep2();
a1.Execute();
Algorithm a2 = new AlgorithmWithStep2and3();
a2.Execute();
Separate();
//Visitor
ElementA ea = new ElementA("ElementA");
ElementA eb = new ElementA("ElementB");
Visitor1 v1 = new Visitor1();
Visitor2 v2 = new Visitor2();
ea.Accept(v1);
ea.Accept(v2);
eb.Accept(v1);
eb.Accept(v2);
#endregion
}
