private function populate_cart_from_order( $order_id, $cart ) {
		$order = wc_get_order( $order_id );

		if ( ! $order->get_id() || ! $order->has_status( apply_filters( 'woocommerce_valid_order_statuses_for_order_again', array( 'completed' ) ) ) || ! current_user_can( 'order_again', $order->get_id() ) ) {
			return;
		}

		if ( apply_filters( 'woocommerce_empty_cart_when_order_again', true ) ) {
			$cart = array();
		}

		$inital_cart_size = count( $cart );
		$order_items      = $order->get_items();

		foreach ( $order_items as $item ) {
			$product_id     = (int) apply_filters( 'woocommerce_add_to_cart_product_id', $item->get_product_id() );
			$quantity       = $item->get_quantity();
			$variation_id   = (int) $item->get_variation_id();
			$variations     = array();
			$cart_item_data = apply_filters( 'woocommerce_order_again_cart_item_data', array(), $item, $order );
			$product        = $item->get_product();

			if ( ! $product ) {
				continue;
			}

			// Prevent reordering variable products if no selected variation.
			if ( ! $variation_id && $product->is_type( 'variable' ) ) {
				continue;
			}

			// Prevent reordering items specifically out of stock.
			if ( ! $product->is_in_stock() ) {
				continue;
			}

			foreach ( $item->get_meta_data() as $meta ) {
				if ( taxonomy_is_product_attribute( $meta->key ) ) {
					$term                     = get_term_by( 'slug', $meta->value, $meta->key );
					$variations[ $meta->key ] = $term ? $term->name : $meta->value;
				} elseif ( meta_is_product_attribute( $meta->key, $meta->value, $product_id ) ) {
					$variations[ $meta->key ] = $meta->value;
				}
			}

			if ( ! apply_filters( 'woocommerce_add_to_cart_validation', true, $product_id, $quantity, $variation_id, $variations, $cart_item_data ) ) {
				continue;
			}

			// Add to cart directly.
			$cart_id          = WC()->cart->generate_cart_id( $product_id, $variation_id, $variations, $cart_item_data );
			$product_data     = wc_get_product( $variation_id ? $variation_id : $product_id );
			$cart[ $cart_id ] = apply_filters(
				'woocommerce_add_order_again_cart_item',
				array_merge(
					$cart_item_data,
					array(
						'key'          => $cart_id,
						'product_id'   => $product_id,
						'variation_id' => $variation_id,
						'variation'    => $variations,
						'quantity'     => $quantity,
						'data'         => $product_data,
						'data_hash'    => wc_get_cart_item_data_hash( $product_data ),
					)
				),
				$cart_id
			);
		}

		do_action_ref_array( 'woocommerce_ordered_again', array( $order->get_id(), $order_items, &$cart ) );

		$num_items_in_cart           = count( $cart );
		$num_items_in_original_order = count( $order_items );
		$num_items_added             = $num_items_in_cart - $inital_cart_size;

		if ( $num_items_in_original_order > $num_items_added ) {
			wc_add_notice(
				sprintf(
					/* translators: %d item count */
					_n(
						'%d item from your previous order is currently unavailable and could not be added to your cart.',
						'%d items from your previous order are currently unavailable and could not be added to your cart.',
						$num_items_in_original_order - $num_items_added,
						'woocommerce'
					),
					$num_items_in_original_order - $num_items_added
				),
				'error'
			);
		}

		if ( 0 < $num_items_added ) {
			wc_add_notice( __( 'The cart has been filled with the items from your previous order.', 'woocommerce' ) );
		}

		return $cart;
	}