Exclude hidden products from cart area.

woocommerce-hidden-products-from-cart.php

<?php
/**
 * Filter hidden product from cart.
 *
 * @since 1.0.0
 *
 * @param bool   $visibility    Visibility.
 * @param array  $cart_item     Cart item.
 * @param string $cart_item_key Cart item key.
 */
function wc_hide_hidden_product_from_cart( $visibility, $cart_item, $cart_item_key ) {
	$_product = apply_filters( 'woocommerce_cart_item_product', $cart_item['data'], $cart_item, $cart_item_key );

    if ( 'hidden' === $_product->get_catalog_visibility() ) {
        $visibility = false;
    }

    return $visibility;
}
add_filter( 'woocommerce_cart_item_visible', 'wc_hide_hidden_product_from_cart', 10, 3 );
add_filter( 'woocommerce_widget_cart_item_visible', 'wc_hide_hidden_product_from_cart', 10, 3 );
add_filter( 'woocommerce_checkout_cart_item_visible', 'wc_hide_hidden_product_from_cart', 10, 3 );

/**
 * Filter hidden product from order.
 *
 * @since 1.0.0
 *
 * @param bool  $visibility Visibility.
 * @param array $order_item Order item.
 */
function wc_hide_hidden_product_from_order( $visibility, $order_item ) {
    $_product = $order_item->get_product();

    if ( 'hidden' === $_product->get_catalog_visibility() ) {
        $visibility = false;
    }

    return $visibility;
}
add_filter( 'woocommerce_order_item_visible', 'wc_hide_hidden_product_from_order', 10, 2 );

/**
 * Exclude hidden products from cart count.
 *
 * @since 1.0.0
 *
 * @param int $quantity Cart item quantity.
 *
 * @return int
 */
function wc_exclude_hidden_minicart_counter( $quantity ) {
	$hidden = 0;

	if ( ! WC()->cart->is_empty() ) {
		foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
			$_product = apply_filters( 'woocommerce_cart_item_product', $cart_item['data'], $cart_item, $cart_item_key );

			if ( 'hidden' === $_product->get_catalog_visibility() ) {
				$hidden += $cart_item['quantity'];
			}
		}

		$quantity -= $hidden;
	}

  return $quantity;
}
add_filter( 'woocommerce_cart_contents_count', 'wc_exclude_hidden_minicart_counter' );