How to add variation stock status to Woocommerce product variation dropdown

I would like to show the stock status (eg. In Stock / Out of Stock) for each product variation shown in the drop down list of variations on the Woocommerce Product Page. I have copied the relevant function to my theme's functions.php file, and can edit the content, but am unsure how to pull out the required stock status for each variation.



// Updated Woocommerce Product Variation Select

if ( ! function_exists( 'wc_dropdown_variation_attribute_options' ) ) {

/**
* Output a list of variation attributes for use in the cart forms.
*
* @param array $args
* @since 2.4.0
*/

/*

function wc_dropdown_variation_attribute_options( $args = array() ) {
$args = wp_parse_args( apply_filters( 'woocommerce_dropdown_variation_attribute_options_args', $args ), array(
'options' => false,
'attribute' => false,
'product' => false,
'selected' => false,
'name' => '',
'id' => '',
'class' => '',
'show_option_none' => __( 'Choose an option', 'woocommerce' ),
) );

$options = $args['options'];
$product = $args['product'];
$attribute = $args['attribute'];
$name = $args['name'] ? $args['name'] : 'attribute_' . sanitize_title( $attribute );
$id = $args['id'] ? $args['id'] : sanitize_title( $attribute );
$class = $args['class'];
$show_option_none = $args['show_option_none'] ? true : false;
$show_option_none_text = $args['show_option_none'] ? $args['show_option_none'] : __( 'Choose an option', 'woocommerce' ); // We'll do our best to hide the placeholder, but we'll need to show something when resetting options.

if ( empty( $options ) && ! empty( $product ) && ! empty( $attribute ) ) {
$attributes = $product->get_variation_attributes();
$options = $attributes[ $attribute ];
}

$html = '';
$html .= '' . esc_html( $show_option_none_text ) . '';

if ( ! empty( $options ) ) {
if ( $product && taxonomy_exists( $attribute ) ) {
// Get terms if this is a taxonomy - ordered. We need the names too.
$terms = wc_get_product_terms( $product->get_id(), $attribute, array( 'fields' => 'all' ) );

foreach ( $terms as $term ) {
if ( in_array( $term->slug, $options ) ) {
$html .= 'slug ) . '" ' . selected( sanitize_title( $args['selected'] ), $term->slug, false ) . '>' . esc_html( apply_filters( 'woocommerce_variation_option_name', $term->name ) ) . ' ';
}
}
} else {
foreach ( $options as $option ) {
// This handles lt 2.4.0 bw compatibility where text attributes were not sanitized.
$selected = sanitize_title( $args['selected'] ) === $args['selected'] ? selected( $args['selected'], sanitize_title( $option ), false ) : selected( $args['selected'], $option, false );

$html .= '' . esc_html( apply_filters( 'woocommerce_variation_option_name', $option ) ) . ' Output Stock Details Here ';
}
}
}

$html .= '';

echo apply_filters( 'woocommerce_dropdown_variation_attribute_options_html', $html, $args );
}
}





I can pull out the stock level for the overall product, but now for each variation.



Any help would be greatly appreciated.