Woocommerce: add items to processing orders

    

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      add_action('woocommerce_before_checkout_form', 'check_for_existing_cod_orders');

function check_for_existing_cod_orders() {
    if (is_user_logged_in()) {
        $user_id = get_current_user_id();
        $args = array(
            'customer_id' => $user_id,
            'status' => 'processing',
            'payment_method' => 'cod',
        );

        $orders = wc_get_orders($args);

        if (!empty($orders)) {
            echo '<div class="woocommerce-info" style="margin-bottom: 20px;">';
            echo '<p>';
            echo __('You already have the following order(s) processing with Cash on Delivery. Would you like to add your new items in any of these orders?');
            echo '</p>';
            echo '<p><i class="fa-solid fa-check" style="color: #23c021;"></i> No additional shipping cost <i class="fa-solid fa-check" style="color: #23c021;"></i> Faster shipping</p>';

            $cart_subtotal_incl_tax = WC()->cart->get_cart_contents_total() + WC()->cart->get_cart_contents_tax();

            foreach ($orders as $order) {
                $order_id = $order->get_id();
                $order_date = $order->get_date_created()->date('Y-m-d H:i:s');
                $payment_method = $order->get_payment_method_title();
                $order_total = $order->get_total();
                $new_total = $order_total + $cart_subtotal_incl_tax;

                echo '<div style="margin-bottom: 10px; border: 1px solid #ddd; padding: 10px; background-color: white; color: black;">';
                echo '<p><strong>Order #' . $order_id . '</strong> - ' . $order_date . ' - Total: ' . wc_price($order_total) . ' - New Total: ' . wc_price($new_total) . '</p>';
echo '<a href="' . esc_url(add_query_arg('combine_order', $order_id)) . '" class="button combine-order-button" style="margin-left: 10px; margin-bottom: 10px; padding: 3px 10px; border-radius: 15px;">';
echo __('Add items to Order #' . $order_id);
echo '</a>';

                echo '<a href="#" onclick="toggleOrderDetails(' . $order_id . '); return false;" style="color: #007cba; text-decoration: underline; text-wrap-mode: nowrap;">';
                echo __('Show Details');
                echo '</a>';
 

                // Hidden details section
                echo '<div id="order-details-' . $order_id . '" style="display: none; margin-top: 10px;">';
                echo '<p><strong>Shipping Method:</strong> ' . $order->get_shipping_method() . ' - ' . wc_price($order->get_shipping_total()) . '</p>';
                echo '<p><strong>Payment Method:</strong> ' . $payment_method . '</p>';
                echo '<div style="display: flex; gap: 25px;"><p><strong>Shipping Address:</strong><br>' . $order->get_formatted_shipping_address() . '</p>';
                echo '<p><strong>Billing Address:</strong><br>' . $order->get_formatted_billing_address() . '</p></div>';

                // List of items
                echo '<p><strong>Items:</strong></p>';
                echo '<ul>';
                foreach ($order->get_items() as $item) {
                    $product_name = $item->get_name();
                    $quantity = $item->get_quantity();
                    echo '<li>' . $product_name . ' x ' . $quantity . '</li>';
                }
                echo '</ul>';
                echo '</div>'; // End of order details div
                echo '</div>'; // End of order block
            }
            echo '</div>';
        }
    }
}

add_action('wp_footer', 'add_toggle_script');
function add_toggle_script() {
    if (is_checkout()) {
        echo '<script type="text/javascript">
            function toggleOrderDetails(orderId) {
                var detailsDiv = document.getElementById("order-details-" + orderId);
                if (detailsDiv.style.display === "none") {
                    detailsDiv.style.display = "block";
                } else {
                    detailsDiv.style.display = "none";
                }
            }
        </script>';
    }
}
add_action('wp_footer', 'add_order_combine_loader_script');

add_action('wp_footer', 'add_order_combine_disable_clicks_script');

function add_order_combine_disable_clicks_script() {
    if (is_checkout()) {
        ?>
        <script type="text/javascript">
            document.addEventListener('DOMContentLoaded', function () {
                document.querySelectorAll('.combine-order-button').forEach(function(button) {
                    button.addEventListener('click', function (e) {
                        e.preventDefault();
                        
                        // Create a full-page overlay
                        var overlay = document.createElement('div');
                        overlay.id = 'disable-clicks-overlay';
                        overlay.style.position = 'fixed';
                        overlay.style.top = '0';
                        overlay.style.left = '0';
                        overlay.style.width = '100%';
                        overlay.style.height = '100%';
                        overlay.style.backgroundColor = 'rgba(255, 255, 255, 0.5)';
                        overlay.style.zIndex = '10000';
                        
                        // Append overlay to the body
                        document.body.appendChild(overlay);

                        // Redirect to the combine order URL
                        window.location.href = button.getAttribute('href');
                    });
                });
            });
        </script>
        <?php
    }
}



add_action('woocommerce_before_checkout_form', 'handle_combine_order');

function handle_combine_order() {
    // Check if the "combine_order" parameter is present in the URL
    if (!isset($_GET['combine_order']) || !is_user_logged_in() || empty($_GET['combine_order'])) {
        return;
    }

    $order_id = intval($_GET['combine_order']);
    $order = wc_get_order($order_id);
    $current_user_id = get_current_user_id();
    
    // Verify the order exists, belongs to the current user, and meets the requirements
    if (!$order || $order->get_user_id() !== $current_user_id || !$order->has_status('processing') || $order->get_payment_method() !== 'cod') {
        wc_add_notice(__('Invalid order or you do not have permission to modify this order.', 'woocommerce'), 'error');
        return;
    }

    $cart = WC()->cart;
    if (!$cart || count($cart->get_cart()) === 0) {
        wc_add_notice(__('Your cart is empty. Please add items to the cart to combine with the existing order.', 'woocommerce'), 'error');
        return;
    }

    $product_details = []; // For storing product names and quantities for the admin note

    foreach ($cart->get_cart() as $cart_item) {
        $product = wc_get_product($cart_item['product_id']);
        $quantity = $cart_item['quantity'];

        // Use WooCommerce's reduce_stock method to handle stock reduction
        if ($product->managing_stock()) {
            try {
                $product->reduce_stock($quantity);
            } catch (Exception $e) {
                wc_add_notice(sprintf(__('Insufficient stock for product: %s', 'woocommerce'), $product->get_name()), 'error');
                return;
            }
        }

        // Add the product to the order
        if (!$order->add_product($product, $quantity)) {
            wc_add_notice(__('Failed to add item to order.', 'woocommerce'), 'error');
            return;
        }

        $product_details[] = $product->get_name() . ' (x' . $quantity . ')';
    }

    // Recalculate totals after adding items
    $order->calculate_totals();

    // Convert product details array into a comma-separated list
    $product_list = implode(', ', $product_details);

    // Add an admin note with the added products
    $order->add_order_note(
        __('Items have been added to this order from the user\'s new checkout attempt. The total has been updated accordingly. Products added: ' . $product_list, 'woocommerce'), 
        true
    );

    // Temporarily disable the "On Hold" email notification
   // remove_action('woocommerce_order_status_pending_to_on-hold_notification', ['WC_Email_Customer_On_Hold_Order', 'trigger']);
   // remove_action('woocommerce_order_status_failed_to_on-hold_notification', ['WC_Email_Customer_On_Hold_Order', 'trigger']);

    // Set the order status to "On Hold"
   // $order->update_status('on-hold', __('Order status changed to On Hold after adding items from checkout.', 'woocommerce'));

    // Re-enable the "On Hold" email notification
   // add_action('woocommerce_order_status_pending_to_on-hold_notification', ['WC_Email_Customer_On_Hold_Order', 'trigger']);
   // add_action('woocommerce_order_status_failed_to_on-hold_notification', ['WC_Email_Customer_On_Hold_Order', 'trigger']);

    // Save the updated order and clear the cart
    $order->save();
    $cart->empty_cart();

    // Redirect to the "Thank You" page of the original order
    wp_safe_redirect($order->get_checkout_order_received_url());
    exit;
}




add_filter( 'woocommerce_register_shop_order_post_statuses', 'bbloomer_register_custom_order_status' );
 
function bbloomer_register_custom_order_status( $order_statuses ) {
   // Status must start with "wc-"!
   $order_statuses['wc-updated'] = array(
      'label' => 'Updated',
      'public' => false,
      'exclude_from_search' => false,
      'show_in_admin_all_list' => true,
      'show_in_admin_status_list' => true,
      'label_count' => _n_noop( 'Updated <span class="count">(%s)</span>', 'Updated <span class="count">(%s)</span>', 'woocommerce' ),
);
   return $order_statuses;
}
 
add_filter( 'wc_order_statuses', 'bbloomer_show_custom_order_status_single_order_dropdown' );
 
function bbloomer_show_custom_order_status_single_order_dropdown( $order_statuses ) {
   $order_statuses['wc-updated'] = 'Updated';
   return $order_statuses;
}    
    

	
How to use this
	
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