WooCommerce custom Ajax add to cart: How to set a custom price? - php

Question

I am trying to add a product from an on_click event at checkout.
That product's price is calculated dynamically with an external API so it is registered as having a price of 0 in woocommerce itself. I am trying to add this product to the cart (working) and then set that product's price to the one I receive from the API (not working). Here is the relevant code:
AJAX call on click:
jQuery('#theftdaminsurance').on('click', function(){
jQuery.ajax({
type: "POST",
url: "/wp-admin/admin-ajax.php",
data: {
action: 'add_product_to_cart_checkout',
// add your parameters here
price: <?php echo $year_dam_price; ?>,
productid: ins_product_id
},
success: function (output) {
document.getElementById("loaderdiv").style.display = "none";
jQuery(document.body).trigger("update_checkout");
}
});
});
I checked everything here and the call is made properly with all the right info being passed on.
Here is the function being called:
add_action('wp_ajax_add_product_to_cart_checkout', 'add_product_to_cart_checkout');
// register the ajax action for unauthenticated users
add_action('wp_ajax_nopriv_add_product_to_cart_checkout', 'add_product_to_cart_checkout');
function add_product_to_cart_checkout() {
$product_id = $_REQUEST['productid'];
$price = floatval($_REQUEST['price']);
$ebike_ids = array(17386,17385,17382,17378,17375,17372,17370,17369,17364,16132,16130,4561,4550,3490,2376);
$found = false;
//check if there is something in cart
if ( sizeof( WC()->cart->get_cart() ) > 0 ) {
//Delete all preexisting insurance products and find qty of ebikes
foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
$product_idebike = $cart_item['product_id'];
if ( ($cart_item['product_id'] == "16600") || ($cart_item['product_id'] == "16653") || ($cart_item['product_id'] == "16654") || ($cart_item['product_id'] == "16655") ||($cart_item['product_id'] == "16659") || ($cart_item['product_id'] == "16660")) {
WC()->cart->remove_cart_item( $cart_item_key );
}
//get ebike quantity
for ($x = 0; $x <= 14; $x++) {
if ($product_idebike == $ebike_ids[$x]) {
$quantity = $cart_item['quantity'];
break;
}
}
}
// if command is not to remove add relevant products
if ($price != "-1") {
WC()->cart->add_to_cart( $product_id, $quantity );
foreach( WC()->cart->get_cart() as $cart_item ){
$id = $cart_item['product_id'];
if ($product_id == $id) {
$cart_item['data']->set_price( $price );
}
}
}
}
}
Here I basically debugged everythingcarefully and everything behaves as it should but the set_price function. I cannot get it to update the product's price to the one passed in the AJAX call. The price remains 0 once the checkout is updated and before it is as well. Am i calling or using this function the wrong way?
Thanks a lot for your help!

Answer 1

It seems that you are making things much more complicated than they should be on your Ajax receiver function…
Note that you can add custom cart item data when using WC_Cart add_to_cart() method, so you will add your insurance price as custom cart item data and afterwards use it to set the price.
Here is your revisited Ajax PHP receiver function:
add_action('wp_ajax_add_product_to_cart_checkout', 'add_product_to_cart_checkout');
add_action('wp_ajax_nopriv_add_product_to_cart_checkout', 'add_product_to_cart_checkout');
function add_product_to_cart_checkout() {
if ( isset($_POST['productid']) && isset($_POST['price']) && ! WC()->cart->is_empty() ) {
$product_id = intval($_POST['productid']);
$price = floatval($_POST['price']);
$ebike_ids = array(17386,17385,17382,17378,17375,17372,17370,17369,17364,16132,16130,4561,4550,3490,2376);
$insurance_ids = array(16600,16653,16654,16655,16659,16660);
$found = false;
$ebike_quantity = 0;
// Loop through cart items
foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
// Delete all preexisting insurance products
if ( in_array( $cart_item['product_id'], $insurance_ids ) ) {
WC()->cart->remove_cart_item( $cart_item_key );
}
// Get ebikes total quantity
if ( in_array( $cart_item['product_id'], $ebike_ids ) ) {
$ebike_quantity += $cart_item['quantity'];
}
}
// If command is not to remove add insurance product with price as custom cart item data
if ( $price >= 0 && $cart_item['insurance_price'] > 0 ) {
WC()->cart->add_to_cart( $product_id, $ebike_quantity, 0, array(), array( 'insurance_price' => $price ) );
}
die();
}
}
Then to set the price you will use:
// Set insurance price from custom cart item data
add_action( 'woocommerce_before_calculate_totals', 'set_insurance_price' );
function set_insurance_price( $cart ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
foreach ( $cart->get_cart() as $cart_item ) {
if( isset($cart_item['insurance_price']) && $cart_item['insurance_price'] > 0 ) {
$cart_item['data']->set_price( $cart_item['insurance_price'] );
}
}
}
Now It should works.