Update Total in checkout of Woocommerce with Ajax Request - php

Question

Before asking question on SO, I searched a lot about what I needed to make a ajax request with WordPress. All my code and the request is working, but is not doing what I need it to do.
What I need to do is When I click at the buttom on checkout page "Novo Dependente", the information with the values to calculate total must update. "Total" value must be updated with a value which I defined at product post type page on admin panel. This value I already get, but the updating the value is real problem to me.
This is the page that I working.
This is the form, that shows up when i click the button, when i Toogle the checkbox I need to add the second value to the Total, another request with ajax.
And here my code goes
Obs: it's a plugin.
Here is the php code.
public function add_total_value()
{
if (! $_POST['action'] || $_POST['action'] !== 'add_total_value' ) :
echo json_encode(
array(
'status' => 'failed',
'message' => 'erro'
)
);
wp_die();
endif;
$woocommerce;
$quantidadeDependentes = $_POST['quantiaDependentes'];
//$produto_valor = WC()->cart->total;
foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item )
{
$product = $cart_item['data'];
$item_id = $cart_item['product_id'];
$endereco_igual = get_post_meta( $item_id, 'adicional_mesmo', true);
$endereco_igual = str_replace(',', '.', $endereco_igual);
$endereco_igual = floatval( filter_var( $endereco_igual, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION ) );
$produtoValor = floatval( get_post_meta( $item_id, '_regular_price', true) );
$valorTotal = $produtoValor + ( $endereco_igual * $quantidadeDependentes );
WC()->cart->total = $valorTotal;
WC()->cart->calculate_totals();
wc_price($valorTotal);
}
echo json_encode(
array(
'status' => 'success',
'valorTotal' => wc_price($valorTotal)
));
wp_die();
}
My Ajax request
function contagemDependentes()
{
$contagem = jQuery('.woocommerce-dependentes-contagem');
var quantiaDependentes = jQuery('.woocommerce-dependentes-card').length;
if ( quantiaDependentes <= 0 ) {
var mensagemNumeroDependentes = 'Nenhum dependente informado';
} else if ( quantiaDependentes === 1 ) {
var mensagemNumeroDependentes = '1 dependente';
} else {
var mensagemNumeroDependentes = quantiaDependentes+' dependentes';
}
jQuery($contagem).html(mensagemNumeroDependentes);
var quantiaDependentes = jQuery('.woocommerce-dependentes-card').length + 1;
var dados = {
action: 'add_total_value',
quantiaDependentes: quantiaDependentes
};
jQuery.ajax({
type: 'POST',
url: custom_values.ajaxurl,
data: dados,
dataType: 'json',
success: function(response)
{
console.log(response);
if (response.status === 'success')
{
console.log(response.status);
console.log(response.valorTotal);
var html = "<tr class='order-total'>";
html += "<th>Total</th>";
html += "<td>";
html += response.valorTotal;
html += "</td>";
html += "</tr>";
jQuery( '.order-total' ).remove();
jQuery( 'tfoot' ).append( html );
jQuery( 'body' ).trigger( 'update_checkout' );
}
}
});
}

Answer 1

before function() in functions.php always must be such code
add_action('wp_ajax_your_function_name', 'your_function_name');
add_action('wp_ajax_nopriv_your_function_name', 'your_function_name');