/// <summary>
/// This method takes paymet as an input, Process the payment and returns list of actions performed during processing of the payment
/// </summary>
/// <param name="payment"></param>
/// <returns></returns>
public List <string> ProcessPayment(Payment payment)
{
//Create a payment context object
PaymentContext paymentContext = new PaymentContext
{
Payment = payment
};
//Create list of IRules instance defined in this assembly
List <Type> ruleTypes = Assembly.GetExecutingAssembly().GetTypes().Where(type => type.GetInterfaces().Contains(typeof(IRule))).ToList();
//stores object of IRule type
List <IRule> rules = new List <IRule>();
foreach (var ruleType in ruleTypes)
{
//Create a instance of IRule type defined
rules.Add((IRule)Activator.CreateInstance(ruleType));
}
//For each rule process the payment context if processing precondition satisfied
foreach (var rule in rules)
{
//check if pre condition is satisfied
if (rule.ShouldProcess(paymentContext))
{
//do processing
rule.Process(paymentContext);
}
}
return(paymentContext.GetActionPerformed());
}