best practice for custom price on an item set by the customer

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Bo Jacobsen 606 posts 2404 karma points

Oct 27, 2021 @ 11:37

0

Best practice for custom price on an item set by the customer

Hi Matt.

We are using VEDNR version 1.8.6.

What would be the best practice for a customer to be able to set a price on an item by them self?

Here is the scenario:

We sell a flower bucket in 3 different sizes like: small (15gp), medium (30gp) and large (60gp). But we would like a 4th option "Custom price", where the customer can set a price by them self. The price has to be minimum, lets say 10gp. And in this scenario the customer want to spend 100gp on a flower bucket.

How would we be able to achive that?

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Matt Brailsford 4125 posts 22223 karma points MVP 9x c-trib

Oct 27, 2021 @ 11:44

0

Hi Bo,

The best way to handle this would be when the adding the product to the cart, capture the amount the customer wishes to pay and store it as an order line property on the given order line. Then extend the default OrderLineCalculator and override the CalculateOrderLineUnitPrice method, checking to see if the order line has this property and if so, return that value as the order line unit price. If the property isn't there, then have it fallback to the default implementation.

Hope this helps

Matt

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Bo Jacobsen 606 posts 2404 karma points

Oct 27, 2021 @ 12:11

Hi Matt.

Is it possible to give an example?

// In a Controller
using (var uow = _vendrApi.Uow.Create(autoComplete: true))
{
    var order = _vendrApi.GetOrCreateCurrentOrder(storeId)
        .AsWritable(uow)
        // Where do i set the custom price?
        .AddProduct(productReference, variantReference, Convert.ToDecimal(quantity))
        // Maybe like this?
        .SetProperty("customprice", "100.00");

    _vendrApi.SaveOrder(order);
}

// Do we need to add this somewhere?
public class MyOrderLineCalculator : OrderLineCalculator
{
    public MyOrderLineCalculator(ITaxService taxService, IStoreService storeService, IProductPriceFreezerService productPriceFreezerService) : base(taxService, storeService, productPriceFreezerService) { }

    public override Price CalculateOrderLineUnitPrice(OrderReadOnly order, OrderLineReadOnly orderLine, Guid currencyId, TaxRate taxRate)
    {
        // What to do here?
        return base.CalculateOrderLineUnitPrice(order, orderLine, currencyId, taxRate);
    }
}

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Bo Jacobsen 606 posts 2404 karma points

Oct 27, 2021 @ 12:21

Maybe like this?

public class MyOrderLineCalculator : OrderLineCalculator
{
    public MyOrderLineCalculator(ITaxService taxService, IStoreService storeService, IProductPriceFreezerService productPriceFreezerService) : base(taxService, storeService, productPriceFreezerService) { }

    public override Price CalculateOrderLineUnitPrice(OrderReadOnly order, OrderLineReadOnly orderLine, Guid currencyId, TaxRate taxRate)
    {
        if(orderLine.Properties["customprice"] != null)
        {
            return Price.Calculate(Convert.ToDecimal(orderLine.Properties["customprice"].Value), taxRate, currencyId);
        }

        return base.CalculateOrderLineUnitPrice(order, orderLine, currencyId, taxRate);
    }
}

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Matt Brailsford 4125 posts 22223 karma points MVP 9x c-trib

Oct 27, 2021 @ 13:13
100
Yup, exactly that 👍

When adding the product, you'd do something like
```
order.AddProduct(ref, qty, new Dictionary<string, string> {
    { "customprice", customPriceValue }
});
```
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Bo Jacobsen 606 posts 2404 karma points

Oct 28, 2021 @ 07:22

Great.

I think we would still add it as variant.

using (var uow = _vendrApi.Uow.Create(autoComplete: true))
{
    var order = _vendrApi.GetOrCreateCurrentOrder(storeId)
        .AsWritable(uow)
        .AddProduct(productReference, variantReference, Convert.ToDecimal(quantity), 
            new Dictionary<string, string> {
                { "customprice", customPrice }
            });
    _vendrApi.SaveOrder(order);
}

public class OrderLineCustomPriceCalculator : OrderLineCalculator
{
    public OrderLineCustomPriceCalculator(ITaxService taxService, IStoreService storeService, IProductPriceFreezerService productPriceFreezerService) : base(taxService, storeService, productPriceFreezerService) { }

    public override Price CalculateOrderLineUnitPrice(OrderReadOnly order, OrderLineReadOnly orderLine, Guid currencyId, TaxRate taxRate)
    {
        if (orderLine.Properties["customprice"] != null && decimal.TryParse(orderLine.Properties["customprice"].Value, out decimal customPrice))
        {
            if (customPrice >= 10)
            {
                return Price.Calculate(customPrice, taxRate, currencyId);
            }
        }
        return base.CalculateOrderLineUnitPrice(order, orderLine, currencyId, taxRate);
    }
}

[ComposeAfter(typeof(VendrWebComposer))]
public class Composer : IUserComposer
{
    public void Compose(Composition composition)
    {
        composition.RegisterUnique<IOrderLineCalculator, OrderLineCustomPriceCalculator>();
    }
}

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