disable-minmax-quantity-rules-for-bundled-products.php

/**
 * Disable Min/Max "Group of" quantity rules for bundled products.
 * This allows bundled items to have a quantity of 1 even when the
 * standalone product has a "Group of 6" rule.
 *
 * @author Shameem Reza
 */

// Product Bundles side - disable Group of for bundled item calculations.
add_filter( 'woocommerce_bundled_item_group_of_quantity', '__return_zero', 999 );

// Min/Max Quantities cart validation - disable Group of for bundled cart items.
add_filter( 'wc_min_max_quantity_group_of_quantity', 'wcsubs_disable_group_of_for_bundled_items', 999, 4 );

/**
 * Disable Group of quantity for bundled cart items.
 *
 * @param int    $group_of_quantity The Group of quantity.
 * @param int    $product_id        The product ID.
 * @param string $cart_item_key     The cart item key.
 * @param array  $cart_item         The cart item data.
 * @return int
 */
function wcsubs_disable_group_of_for_bundled_items( $group_of_quantity, $product_id, $cart_item_key, $cart_item ) {
	if ( is_array( $cart_item ) && function_exists( 'wc_pb_is_bundled_cart_item' ) && wc_pb_is_bundled_cart_item( $cart_item ) ) {
		return 0;
	}
	return $group_of_quantity;
}

// Store API level - override quantity limits for bundled cart items.
add_filter( 'woocommerce_store_api_product_quantity_minimum', 'wcsubs_fix_bundled_item_store_api_min', 999, 3 );
add_filter( 'woocommerce_store_api_product_quantity_maximum', 'wcsubs_fix_bundled_item_store_api_max', 999, 3 );
add_filter( 'woocommerce_store_api_product_quantity_multiple_of', 'wcsubs_fix_bundled_item_store_api_step', 999, 3 );

/**
 * Fix minimum quantity for bundled items in Store API.
 *
 * @param int        $value     The minimum quantity.
 * @param WC_Product $product   The product object.
 * @param array|null $cart_item The cart item data.
 * @return int
 */
function wcsubs_fix_bundled_item_store_api_min( $value, $product, $cart_item ) {
	if ( wcsubs_is_bundled_cart_item( $cart_item ) ) {
		return 1;
	}
	return $value;
}

/**
 * Fix maximum quantity for bundled items in Store API.
 *
 * @param int        $value     The maximum quantity.
 * @param WC_Product $product   The product object.
 * @param array|null $cart_item The cart item data.
 * @return int
 */
function wcsubs_fix_bundled_item_store_api_max( $value, $product, $cart_item ) {
	if ( wcsubs_is_bundled_cart_item( $cart_item ) ) {
		return 9999;
	}
	return $value;
}

/**
 * Fix step/multiple_of quantity for bundled items in Store API.
 *
 * @param int        $value     The step quantity.
 * @param WC_Product $product   The product object.
 * @param array|null $cart_item The cart item data.
 * @return int
 */
function wcsubs_fix_bundled_item_store_api_step( $value, $product, $cart_item ) {
	if ( wcsubs_is_bundled_cart_item( $cart_item ) ) {
		return 1;
	}
	return $value;
}

/**
 * Helper function to check if cart item is a bundled item.
 *
 * @param array|null $cart_item The cart item data.
 * @return bool
 */
function wcsubs_is_bundled_cart_item( $cart_item ) {
	if ( ! is_array( $cart_item ) ) {
		return false;
	}

	if ( function_exists( 'wc_pb_is_bundled_cart_item' ) && wc_pb_is_bundled_cart_item( $cart_item ) ) {
		return true;
	}

	// Fallback check.
	if ( isset( $cart_item['bundled_by'] ) || isset( $cart_item['bundled_item_id'] ) ) {
		return true;
	}

	return false;
}