/// <summary>
/// Retrieves a discount strategy associated to the customer type
/// </summary>
/// <param name="customerType">Based on the type of customer, return the appropriate discount strategy</param>
/// <returns>the appropriate discount strategy</returns>
public static IDiscountStrategy GetDiscountStrategyForCustomerType(StrategyPattern.Enumerations.EventEnumerations.CustomerType customerType)
{
//Retrieve the enumeration's attributes specified in Enumerations/EventEnumerations.cs
FieldInfo field = customerType.GetType().GetField(customerType.ToString());
object[] attribs = field.GetCustomAttributes(typeof(DiscountTypeAttribute), false);
//If no attribute was specified, then return the normal price by default
if (attribs.Length == 0)
return new NullDiscountStrategy();
return Activator.CreateInstance((attribs[0] as DiscountTypeAttribute).DiscountStrategy) as IDiscountStrategy;
}
static void Main(string[] args)
{
Console.WriteLine("DESIGN PATTERNS DEMYSTIFIED !!!");
IPattern pattern;
pattern = new StrategyPattern();
pattern.Implement();
pattern = new DependencyInjection();
pattern.Implement();
pattern = new ObserverPattern();
pattern.Implement();
Console.ReadLine();
}
public IEnumerable<Event> GetEvents(StrategyPattern.Enumerations.EventEnumerations.CustomerType customerType)
{
//Hydrate list with mock data. Each event has a base price (used for the standard customer type)
IEnumerable<Event> events = new List<Event>()
{
{new Event{ Name = "Symposium on Software Development", Date = new DateTime(2015, 12, 15), TicketPrice = new Price{ Cost = 150},
Location = new Location{ Address1 = "55 test street", Address2="", Name="The Blue Theater", State="NY", Zipcode="11757" }}},
{new Event{ Name = "SQL Injection and XSS Attacks", Date = new DateTime(2016, 1, 21), TicketPrice = new Price{ Cost = 75} ,
Location = new Location{ Address1 = "55 test street", Address2="", Name="The Blue Theater", State="NY", Zipcode="11757" }}},
{new Event{ Name = "Security in Software Development", Date = new DateTime(2015, 11, 14), TicketPrice = new Price{ Cost = 250},
Location = new Location{ Address1 = "55 test street", Address2="", Name="The Blue Theater", State="NY", Zipcode="11757" }}}
};
//Determine which strategy to apply based on the customer type
IDiscountStrategy discountStrategy = DiscountFactory.GetDiscountStrategyForCustomerType(customerType);
//Apply the discount selected to each product, and return the discounted collection
return events.ApplyDiscount(discountStrategy);
}
public Task StartAsync(CancellationToken cancellationToken)
{
Console.WriteLine(_configuration["Logging:LogLevel:Default"]);
IDesignPattern specificationPattern = new SpecificationPattern();
specificationPattern.ExecuteSample();
IDesignPattern factoryMethod = new FactoryMethodPattern();
factoryMethod.ExecuteSample();
IDesignPattern singletonPattern = new SingletonPattern();
singletonPattern.ExecuteSample();
IDesignPattern commandPattern = new CommandPattern();
commandPattern.ExecuteSample();
IDesignPattern chainOfResponsibilityPattern = new ChainOfResponsibilityPattern();
chainOfResponsibilityPattern.ExecuteSample();
IDesignPattern decoratorPattern = new DecoratorPattern();
decoratorPattern.ExecuteSample();
IDesignPattern strategyPattern = new StrategyPattern();
strategyPattern.ExecuteSample();
IDesignPattern abstractFactoryPattern = new AbstractFactoryPattern();
abstractFactoryPattern.ExecuteSample();
IDesignPattern compositePattern = new CompositePattern();
compositePattern.ExecuteSample();
IDesignPattern bridgePattern = new BridgePattern();
bridgePattern.ExecuteSample();
IDesignPattern observerPattern = new ObserverPattern();
observerPattern.ExecuteSample();
IDesignPattern statePattern = new StatePattern();
statePattern.ExecuteSample();
IDesignPattern mediatorPattern = new MediatorPattern();
mediatorPattern.ExecuteSample();
IDesignPattern visitorPattern = new VisitorPattern();
visitorPattern.ExecuteSample();
IDesignPattern momentoPattern = new MomentoPattern();
momentoPattern.ExecuteSample();
return(Task.CompletedTask);
}