FunnelKit Cart: Exclude Bundled Product Upsells

FunnelKit Cart: Exclude Bundled Product Upsells

/**
 * Exclude bundled product upsells from cart "Frequently Bought Together".
 * Drop this in wp-content/mu-plugins/ or add to theme functions.php.
 *
 * Requires: WooCommerce Product Bundles + FunnelKit Cart + fkcart_upsell_ids filter in upsells.php
  */
add_filter( 'fkcart_upsell_ids', function ( $upsell_ids ) {
	if ( ! WC()->cart || empty( $upsell_ids ) ) {
		return $upsell_ids;
	}

	// Product IDs that are in cart as standalone (not only bundled).
	$standalone_product_ids = [];
	foreach ( WC()->cart->get_cart_contents() as $cart_item ) {
		if ( ! empty( $cart_item['bundled_by'] ) ) {
			continue;
		}
		$product = $cart_item['data'] ?? null;
		if ( $product instanceof WC_Product ) {
			$id = $product->is_type( 'variation' ) ? $product->get_parent_id() : $product->get_id();
			$standalone_product_ids[ $id ] = true;
		}
	}

	$bundled_upsell_ids = [];
	foreach ( WC()->cart->get_cart_contents() as $cart_item ) {
		if ( empty( $cart_item['bundled_by'] ) ) {
			continue;
		}
		$product = $cart_item['data'] ?? null;
		if ( ! $product instanceof WC_Product ) {
			continue;
		}
		$product_id = $product->is_type( 'variation' ) ? $product->get_parent_id() : $product->get_id();
		// Skip: product is also in cart as standalone, so its upsells should show.
		if ( ! empty( $standalone_product_ids[ $product_id ] ) ) {
			continue;
		}
		$p = wc_get_product( $product_id );
		if ( $p instanceof WC_Product ) {
			$bundled_upsell_ids = array_merge(
				$bundled_upsell_ids,
				$p->get_upsell_ids(),
				$p->get_cross_sell_ids()
			);
		}
	}

	$bundled_upsell_ids = array_unique( array_map( 'absint', $bundled_upsell_ids ) );

	return array_values( array_diff( $upsell_ids, $bundled_upsell_ids ) );
}, 10, 1 );