Managing CSP Pricing in WooCommerce Cart Using the ‘wdm_csp_apply_quantity_price_in_cart’ Filter

Description:
In this guide, we will explore how to use the filter wdm_csp_apply_quantity_price_in_cart in WooCommerce to manage the application of Customer-Specific Pricing (CSP) in the cart. We will also provide practical examples that show how to conditionally disable CSP pricing for certain users or products.

Understanding the ‘wdm_csp_apply_quantity_price_in_cart’ Filter

The filter 'wdm_csp_apply_quantity_price_in_cart' allows you to control how Customer-Specific Pricing (CSP) is applied to products in a WooCommerce cart. This filter is useful when you want to conditionally enable or disable CSP prices based on specific rules, such as user IDs, product types, or other custom logic.

This filter is especially helpful when you want to stop CSP pricing from being applied to certain products or for particular users in your WooCommerce store.

When would you need to use this filter?

• If you have special users or user groups for whom you don’t want CSP prices to be applied.
• If certain products, such as bundles, should not follow CSP pricing rules.
• If you want to implement specific business rules that require manual intervention in the CSP price application.

Example 1: Disable CSP Pricing for a Specific User

In this example, let’s say you have a specific user (with user ID 123) who should not benefit from CSP prices for some reason, like a special agreement or membership. The filter will ensure CSP prices don’t apply to this user when they add products to the cart.

Step-by-Step Breakdown:

1. Create a Custom Filter Hook:
   We use the add_filter() function to connect the filter 'wdm_csp_apply_quantity_price_in_cart' with a custom function that manages the price application. Here, the filter is called with a priority of 11 and accepts three arguments: $apply (whether to apply CSP pricing), $cart_product_id (the product ID in the cart), and $cart_item (details about the item in the cart).
   
2. Write a Function to Check the User ID:
   We define the function applyCSPInCart(), which first checks the current logged-in user’s ID using get_current_user_id(). If the user ID is 123, the function will return false, meaning CSP pricing won’t be applied for this user.
   
3. Return the Value Based on the Condition:
   If the user’s ID is not 123, CSP pricing will continue to apply as usual. But if it matches, the function ensures that the CSP price is turned off by setting $apply to false.

Here is the code:

add_filter('wdm_csp_apply_quantity_price_in_cart', 'applyCSPInCart', 11, 3);

if (!function_exists('applyCSPInCart')) {
    function applyCSPInCart($apply, $cart_product_id, $cart_item) {
        // Get the ID of the current logged-in user
        $userId = get_current_user_id();
        
        // Check if the user ID is 123
        if(0 !== $userId && 123 === $userId) {
            // Disable CSP pricing for this user
            $apply = false;
        }
        
        // Return whether to apply CSP or not
        return $apply;
    }
}

How This Code Works:

• When a user with ID 123 adds products to their cart, the code stops the CSP price from being applied.
• For all other users, CSP prices will apply as expected.
• This method is particularly useful if you have VIP customers or certain business cases where CSP rules shouldn’t apply.

Additional Use Cases

You can extend this filter for other conditions as well:

• Disable CSP for specific products: You can modify the code to check for product IDs instead of user IDs if you want to stop CSP from being applied to particular products (like bundles or promotional items).
• Multiple users: Similarly, you can add conditions to exclude CSP for a group of users, not just one.

For a full list of actions and filters available in the Customer-Specific Pricing plugin, you can refer to this comprehensive guide.

By using the wdm_csp_apply_quantity_price_in_cart filter, you can gain complete control over how CSP prices are applied in WooCommerce, enabling you to create flexible pricing rules tailored to specific users or products.