static void IRuleExample()
{
// Create an input object (component)
var customer = new Customer {
ID = 1, Name = "Amitabh"
};
// Create an output object (discount)
var discount = new CustomerDiscount();
// Create a new rule for xmas seasson
SeasonDiscount seasonal = new SeasonDiscount(new DateTime(2019, 12, 15), new DateTime(2019, 12, 25), 5);
// Populate the engine
var engine = new RulesEngine(component: customer, output: discount);
engine.AddRule(new Rule(seasonal));
// Run the rule
var result = engine.RunAllRules();
// Check if we got the discount
Console.WriteLine($"Seasonal discount {discount.Discount}");
// Let's inspect the result
Console.WriteLine(result);
}
public bool RuleMethod(object component, object output)
{
CustomerDiscount discountObj = (CustomerDiscount)output;
if (DateTime.Today >= SeasonStart && DateTime.Today <= SeasonEnd)
{
discountObj.Discount += this.Discount;
}
return(true);
}
static bool seniorCitizenDiscount(Customer customer, CustomerDiscount discount)
{
var span = (DateTime.Today - customer.Birthdate);
int age = span.Days / 365;
if (age > 60)
{
discount.Discount = Math.Max(discount.Discount, 20);
}
return(true);
}
static void RuleClassExample()
{
/**
* Create the component to initialize the RulesEngine
* We don't HAVE to have a component, the rules can still run
*/
var bigB = new Customer
{
ID = 1,
Name = "Amitabh",
Birthdate = new DateTime(1942, 10, 11),
FirstPurchase = new DateTime(2005, 1, 2),
};
/**
* Create an output object for Rules Engine
* We don't HAVE to have an output object
*/
var discount = new CustomerDiscount();
// Create Engine Attributes
var engineAttributes = new EngineAttributes {
Component = bigB, Output = discount
};
// We can add individual rules or an array of rules
var rulesArray = new Rule[] { new Rule(seniorCitizenDiscount, ruleName: "Senior") };
// Start the engine with attributes and initial rules list
var engine = new RulesEngine(engineAttributes, rulesArray);
// We are adding multiple rules based on the same class, so we must name them explicitly
engine.AddRule(new Rule(new LoyaltyDiscount(1, 5), ruleName: "L1"));
engine.AddRule(new Rule(new LoyaltyDiscount(5, 8), ruleName: "L2"));
engine.AddRule(new Rule(new LoyaltyDiscount(10, 10), ruleName: "L3"));
Console.WriteLine(engine.RunAllRules());
}
