Data Storage

{
  "capacity_type": "fixed",
  "max_items": 12,
  "min_items": 6,
  "allow_partial": false,
  "pricing_model": "per_item",
  "fixed_price": 0,
  "product_source": "categories",
  "allowed_cats": [12, 15, 18],
  "allowed_products": [],
  "layout": "grid",
  "products_per_page": 12
}

[
    'boxbuilder_is_parent'     => true,
    'boxbuilder_session_id'    => 'unique-session-id',
    'boxbuilder_items'         => [
        ['product_id' => 45, 'quantity' => 2],
        ['product_id' => 67, 'quantity' => 1],
    ],
    'boxbuilder_message'       => 'Happy Birthday!',
]

[
    'boxbuilder_is_child'          => true,
    'boxbuilder_parent_session_id' => 'unique-session-id',
]

// Parent order item
$item->get_meta( '_boxbuilder_is_box' );       // 'yes'
$item->get_meta( '_boxbuilder_contents' );     // array of items
$item->get_meta( '_boxbuilder_message' );      // 'Happy Birthday!'

// Child order item
$item->get_meta( '_boxbuilder_is_child' );     // 'yes'
$item->get_meta( '_boxbuilder_part_of_box' );  // parent order item ID

// Get all orders with box products
$orders = wc_get_orders( [
    'meta_query' => [
        [
            'key'   => '_boxbuilder_is_box',
            'value' => 'yes',
        ],
    ],
] );

get_option( 'boxbuilder_default_layout', 'grid' );
get_option( 'boxbuilder_products_per_page', 12 );
get_option( 'boxbuilder_primary_color', '#5c6ac4' );
get_option( 'boxbuilder_gift_message_enabled', 'yes' );