基于不同产品的不同配方的定制价格

Question

我正在尝试根据公式更改woocommerce产品的价格，但是对于每种产品，我都会根据所选的变化选项使用不同的公式。那么，有什么方法可以做到吗？

我已经使用JavaScript计算重量，所选的选项也已保存在订单和购物车及结帐页面中。我有以下代码，但它正在更改我所有产品的公式。

add_action('woocommerce_before_add_to_cart_button', 'custom_data_hidden_fields');

function custom_data_hidden_fields() {
global $product;
  $id = $product->get_id();
  if($id == 10 ){
    echo '<div class="imput_fields custom-imput-fields">
        <label class="age_prod">Age: <br>
             <select name="customer_name" id="MrP">
                <option value="1" selected="selected">1</option>
                <option value="2">2</option>
                <option value="3">3</option>
                <option value="4">4</option>
                <option value="5">5</option>
            </select>
        </label>
        <label class="quality_prod">Quality: <br>
            <select name="customer_message" id="MrS">
                <option value="1" selected="selected">1</option>
                <option value="2">2</option>
                <option value="3">3</option>
                <option value="4">4</option>
                <option value="5">5</option>
            </select>
        </label>
        <input name="weight" id="MrPS"/>
    </div><br>
    <script>
var MrP = document.getElementById( "MrP" ),
    MrPValue = MrP.value;
     var MrS = document.getElementById( "MrS" ),
  MrSValue = MrS.value;
MrP.onchange=()=>calculate();
MrS.onchange=()=>calculate();

function calculate(){
MrPValue = MrP.value;
MrSValue = MrS.value;

 var sum = 0;
 var a = +MrPValue;
 var b = +MrSValue;

 sum = a + b;
 document.getElementById("MrPS").value = sum;
 }

  calculate()
</script>
    ';
}}


/**
 * Display the custom data on cart and checkout page
 */
add_filter( 'woocommerce_get_item_data', 'get_item_data' , 25, 2 );
function get_item_data ( $other_data, $cart_item ) {
    if ( isset( $cart_item [ 'custom_data' ] ) ) {
        $custom_data  = $cart_item [ 'custom_data' ];

        $other_data[] =   array( 'name' => 'Name',
                     'display'  => $custom_data['customer_name'] );
        $other_data[] =   array( 'name' => 'Message',
                     'display'  => $custom_data['customer_message'] );
        $other_data[] =   array( 'name' => 'Weight',
                     'display'  => $custom_data['weight'] );
    }

    return $other_data;
}
/**
 * Add order item meta
 */
add_action( 'woocommerce_add_order_item_meta', 'add_order_item_meta' , 10, 2);
function add_order_item_meta ( $item_id, $values ) {
    if ( isset( $values [ 'custom_data' ] ) ) {
        $custom_data  = $values [ 'custom_data' ];
        wc_add_order_item_meta( $item_id, 'Name', $custom_data['customer_name'] );
        wc_add_order_item_meta( $item_id, 'Message', $custom_data['customer_message'] );
        wc_add_order_item_meta( $item_id, 'Weight', $custom_data['weight'] );
    }
}
add_filter( 'woocommerce_add_cart_item_data', 'add_cart_item_data', 25, 2 );
function add_cart_item_data( $cart_item_meta, $product_id ) {

    if ( isset( $_POST ['customer_name'] ) && isset( $_POST ['customer_message'] ) && isset( $_POST ['weight'] ) ) {
        $custom_data  = array() ;
        $custom_data [ 'customer_name' ]    = isset( $_POST ['customer_name'] ) ?  sanitize_text_field ( $_POST ['customer_name'] ) : "" ;
        $custom_data [ 'customer_message' ] = isset( $_POST ['customer_message'] ) ? sanitize_text_field ( $_POST ['customer_message'] ): "" ;
        $custom_data [ 'weight' ] = isset( $_POST ['weight'] ) ? sanitize_text_field ( $_POST ['weight'] ): "" ;
        $cart_item_meta ['custom_data']     = $custom_data ;
    }

    return $cart_item_meta;
}
// Replace the item price by your custom calculation
add_action( 'woocommerce_before_calculate_totals', 'add_custom_item_price', 10 );
function add_custom_item_price( $cart ) {
$targeted_product_id = 10;
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;

    foreach ( $cart->get_cart() as $cart_item ) {
        // Product ID
        $product_id = version_compare( WC_VERSION, '3.0', '<' ) ? $cart_item['data']->id : $cart_item['data']->get_id();
        // Product original price
        $original_price = version_compare( WC_VERSION, '3.0', '<' ) ? $cart_item['data']->price : $cart_item['data']->get_price();
        $original_price = $item_values['data']->price; 

        ## --- Get your custom cart item data --- ##
        if( isset($cart_item['custom_data']['customer_name']) )
            $customer_name     = $cart_item['custom_data']['customer_name'];
        if( isset($cart_item['custom_data']['customer_message']) )
            $customer_message = $cart_item['custom_data']['customer_message'];

        // CALCULATION FOR EACH ITEM:
        ## Make HERE your own calculation to feet your needs  <==  <==  <==  <==
        $new_price = $original_price + ( ($customer_name * $customer_message) );

        ## Set the new item price in cart
        if( version_compare( WC_VERSION, '3.0', '<' ) )
            $cart_item['data']->price = $new_price;
        else
            $cart_item['data']->set_price($new_price);
    }
}