public override linq.Expression <Func <IEvaluationContext, bool> > GetExpression()
{
var paramX = linq.Expression.Parameter(typeof(IEvaluationContext), "x");
var castOp = linq.Expression.MakeUnary(linq.ExpressionType.Convert, paramX, typeof(PromotionEvaluationContext));
var methodInfo = typeof(PromotionEvaluationContext).GetMethod("IsItemInCategory");
var methodCall = linq.Expression.Call(castOp, methodInfo, linq.Expression.Constant(SelectedCategoryId), ExcludingCategoryIds.GetNewArrayExpression(),
ExcludingProductIds.GetNewArrayExpression());
var retVal = linq.Expression.Lambda <Func <IEvaluationContext, bool> >(methodCall, paramX);
return(retVal);
}
public override linq.Expression <Func <IEvaluationContext, bool> > GetExpression()
{
var paramX = linq.Expression.Parameter(typeof(IEvaluationContext), "x");
var castOp = linq.Expression.MakeUnary(linq.ExpressionType.Convert, paramX, typeof(PromotionEvaluationContext));
var methodInfo = typeof(PromotionEvaluationContext).GetMethod("GetItemsOfCategoryQuantity");
var methodCall = linq.Expression.Call(castOp, methodInfo, linq.Expression.Constant(SelectedCategoryId), ExcludingCategoryIds.GetNewArrayExpression(),
ExcludingProductIds.GetNewArrayExpression(), ExcludingSkuIds.GetNewArrayExpression());
var numItem = linq.Expression.Constant(NumItem);
var binaryOp = ExactlyLeast.IsExactly ? linq.Expression.Equal(methodCall, numItem) : linq.Expression.GreaterThanOrEqual(methodCall, numItem);
var retVal = linq.Expression.Lambda <Func <IEvaluationContext, bool> >(binaryOp, paramX);
return(retVal);
}
/// <summary>
/// ((PromotionEvaluationContext)x).GetCartItemsOfCategoryQuantity(CategoryId, ExcludingCategoryIds, ExcludingProductIds) > NumItem
/// </summary>
/// <returns></returns>
public override linq.Expression <Func <IEvaluationContext, bool> > GetConditionExpression()
{
var paramX = linq.Expression.Parameter(typeof(IEvaluationContext), "x");
var castOp = linq.Expression.MakeUnary(linq.ExpressionType.Convert, paramX, typeof(PromotionEvaluationContext));
var methodInfo = typeof(PromotionEvaluationContextExtension).GetMethod("GetCartItemsOfCategoryQuantity");
var leftOperandExpression = linq.Expression.Call(null, methodInfo, castOp, linq.Expression.Constant(CategoryId), ExcludingCategoryIds.GetNewArrayExpression(),
ExcludingProductIds.GetNewArrayExpression());
var rightOperandExpression = linq.Expression.Constant(NumItem);
var rightSecondOperandExpression = linq.Expression.Constant(NumItemSecond);
var result = linq.Expression.Lambda <Func <IEvaluationContext, bool> >(GetConditionExpression(rightOperandExpression, rightOperandExpression, rightSecondOperandExpression), paramX);
return(result);
}
public override linq.Expression <Func <IEvaluationContext, bool> > GetExpression()
{
var paramX = linq.Expression.Parameter(typeof(IEvaluationContext), "x");
var castOp = linq.Expression.MakeUnary(linq.ExpressionType.Convert, paramX, typeof(PromotionEvaluationContext));
var lineItemTotal = linq.Expression.Constant(LineItemTotal);
var methodInfo = typeof(PromotionEvaluationContext).GetMethod("IsAnyLineItemTotal");
var equalsOrAtLeast = ExactlyLeast.IsExactly ? linq.Expression.Constant(true) : linq.Expression.Constant(false);
var methodCall = linq.Expression.Call(castOp, methodInfo, lineItemTotal, equalsOrAtLeast, ExcludingCategoryIds.GetNewArrayExpression(),
ExcludingProductIds.GetNewArrayExpression(), ExcludingSkuIds.GetNewArrayExpression());
var retVal = linq.Expression.Lambda <Func <IEvaluationContext, bool> >(methodCall, paramX);
return(retVal);
}
/// <summary>
/// ((PromotionEvaluationContext)x).IsItemInCategory(CategoryId, ExcludingCategoryIds, ExcludingProductIds)
/// </summary>
public override bool IsSatisfiedBy(IEvaluationContext context)
{
var result = false;
if (context is PromotionEvaluationContext promotionEvaluationContext)
{
result = promotionEvaluationContext.IsItemInCategory(CategoryId, ExcludingCategoryIds.ToArray(), ExcludingProductIds.ToArray());
}
return(result);
}
/// <summary>
/// ((PromotionEvaluationContext)x).GetCartItemsOfCategoryQuantity(CategoryId, ExcludingCategoryIds, ExcludingProductIds) > NumItem
/// </summary>
public override bool Evaluate(IEvaluationContext context)
{
var result = false;
if (context is PromotionEvaluationContext promotionEvaluationContext)
{
var quantity = promotionEvaluationContext.GetCartItemsOfCategoryQuantity(CategoryId, ExcludingCategoryIds.ToArray(), ExcludingProductIds.ToArray());
result = UseCompareCondition(quantity, NumItem, NumItemSecond);
}
return(result);
}
