WooCommerce: Display "Already in cart - add again?" for Add to Cart button

woocommerce-display-product-already-in-cart

/**
 * Change "Add to cart" button text on single product page
 *
 * @author Wil Brown zeropointdevelopment.com
 * @return string|void
 */
function zpd_wc_add_to_cart_again_button() {

    global $woocommerce;

    foreach($woocommerce->cart->get_cart() as $cart_item_key => $values ) {
        $_product = $values['data'];

        if( get_the_ID() == $_product->id ) {
            return __('Already in cart - Add Again?', 'woocommerce');
        }
    }

    return __('Add to cart', 'woocommerce');
}
add_filter( 'woocommerce_product_single_add_to_cart_text', 'zpd_wc_add_to_cart_again_button' );

/**
 * Change "Add to cart" button text in product archives
 *
 * @author Wil Brown zeropointdevelopment.com
 * @return string|void
 */
function zpd_wc_archive_add_to_cart_again_button() {

    global $woocommerce;

    foreach($woocommerce->cart->get_cart() as $cart_item_key => $values ) {
        $_product = $values['data'];

        if( get_the_ID() == $_product->id ) {
            return __('Already in cart', 'woocommerce');
        }
    }

    return __('Add to cart', 'woocommerce');
}
add_filter( 'add_to_cart_text', 'zpd_wc_archive_add_to_cart_again_button' );