Apply logical Pricing on Woocommerce Attributes - wordpress

Question

Dear I've a Pizza site and I'm using Woocommerce plugin. I want to apply some price check on attributes.
My Question is
I've a Pizza product which attributes are Size and Meat. Size(Small,large) Meat(Chicken, donair meat etc).
I've applied a check on attributes that when a customer select a product size, small and one piece of meat, the price will be $10 on default rate. But I want to apply this logic here that, when a customer select a more than one piece of meat (Extra topping), Then I want to add $2 on total price like ($10 + $2 = 12).
please help me??

Answer 1

Please use this action for adding the extra price on woocommerce cart.Now you need to work on the commented loop code and apply the simple login.Now I have added a summary for how you will work.
I have use it and now it is working on my local system.
add_action( 'woocommerce_before_calculate_totals', 'add_custom_price' );
function add_custom_price( $cart_object ) {
$custom_price = 10; // This will be your custome price
foreach ( $cart_object->cart_contents as $key => $value ) {
$productid = $value['product_id'];
$variationArr =$value['variation']; //it is an array have the value : meat and size i.e chicken and small
//In every loop you can count the number of products .
//Note: In array($variationArr),It have all the active attribute of this product which is created by admin in woocommece.
//so you can search it by loop;
/*
* Like
* foreach($variationArr as $k=>$v)
* {
* //here is the variation product size
* }
*
*/
//Now increase the price.
$price = $value['data']->price;
$extraPrice = 2;
$newPrice = $price + $extraPrice;
$value['data']->price = $newPrice;
}
}