Meta Pixel ViewContent and AddToCart for WooCommerce

add_action( 'wp_footer', function () {
    if ( ! function_exists( 'is_product' ) ) {
        return;
    }

    $view = null;

    if ( is_product() ) {
        $product = wc_get_product( get_queried_object_id() );

        if ( $product ) {
            $view = array(
                'content_ids'  => array( (string) $product->get_id() ),
                'content_name' => $product->get_name(),
                'content_type' => $product->is_type( 'variable' ) ? 'product_group' : 'product',
                'value'        => round( (float) wc_get_price_to_display( $product ), 2 ),
                'currency'     => get_woocommerce_currency(),
            );
        }
    }
    ?>
<script>
(function () {
    if (typeof fbq !== 'function') { return; }
    var view = <?php echo wp_json_encode( $view ); ?>;
    if (view) {
        fbq('track', 'ViewContent', view);
        var form = document.querySelector('form.cart');
        if (form) {
            form.addEventListener('submit', function () {
                fbq('track', 'AddToCart', { content_ids: view.content_ids, content_type: 'product', value: view.value, currency: view.currency });
            });
        }
    }
    if (window.jQuery) {
        jQuery(document.body).on('added_to_cart', function (e, f, h, button) {
            var id = button && button.length ? button[0].getAttribute('data-product_id') : '';
            fbq('track', 'AddToCart', { content_ids: id ? [String(id)] : [], content_type: 'product' });
        });
    }
})();
</script>
    <?php
} );