Shared availability between products within the same category

[Valentina R]

Example of how it would be used:

Category 1 :
Product A, Product B, Product C
for each product I have : staffMember1, staffMember2, staffMember3

Category 2 :
Product C, Product D, Product E
for each product I have : staffMember1, staffMember2, staffMember3

the 17/11/2021 at 12:00, a client schedules Product A. It’s OK. Automatically with staffMember1.
the 17/11/2021 at 12:00, the slot for Product A, Product B, Product C is no more possible. Because there are in the same category.
the 17/11/2021 at 12:00, a client can schedules Product C. It’s Ok because product C is in another category and no product of it has been already scheduled. Automatically with staffMember2 (staffMember1 has been scheduled with product A).

Requested here.

[Valentina R]

Can be done with this code snippet:

// Make sure common capacity is shared between common products.
add_filter( 'wc_apointments_check_appointment_product', 'common_capacity_between_products', 10, 3 );
function common_capacity_between_products( $return, $appointment_id, $product_id ) {
    $appointment            = get_wc_appointment( $appointment_id );
    $appointment_product_id = (int) $appointment->get_product_id();
    $common_product_ids     = array( 291, 340, 582, 583); #product IDs with shared capacity.

    if ( $appointment_product_id !== $product_id && in_array( $product_id, $common_product_ids ) ) {
        return false;
    }

    return $return;
};

// Include all common product IDs inside appointment query.
add_filter( 'woocommerce_appointments_in_date_range_query_args', 'common_product_ids_in_date_range_query_args' );
add_filter( 'woocommerce_appointments_for_objects_query_args', 'common_product_ids_in_date_range_query_args' );
function common_product_ids_in_date_range_query_args( $args ) {
    if ( isset( $args['product_id'] ) && ! empty( $args['product_id'] ) ) {
        $product_ids        = is_array( $args['product_id'] ) ? $args['product_id'] : array( $args['product_id'] );
        $common_product_ids = array( 291, 340 ); #product IDs with shared capacity.
        $common_product_ids_2 = array( 582, 583 ); #product IDs with shared capacity.

        // Check if queried product ID has shared capacity.
        $common_result = array_intersect( $product_ids, $common_product_ids );
        if ( $common_result ) {
            $args['product_id'] = array_unique( array_merge( $product_ids, $common_product_ids ) );
        }

        // Check if queried product ID has shared capacity.
        $common_result_2 = array_intersect( $product_ids, $common_product_ids_2 );
        if ( $common_result_2 ) {
            $args['product_id'] = array_unique( array_merge( $product_ids, $common_product_ids_2 ) );
        }
    }

    return $args;
}