Code-Snippets-Functions/Execute a function on a child site/WooCommerce/add-parent-name-to-term-list-in-dropdown-eg-coupon-category-list.txt

// Prepend the parent term name to the term name output
function prepend_parent_term_name( $term, $sep = ' > ' ) {
    if (isset($term->parent) && $term->parent > 0) {
        $parent_name = get_term_by('id', $term->parent, $term->taxonomy)->name;
        return esc_html( $parent_name ) . $sep . esc_html( $term->name );
    } else {
        return esc_html( $term->name );
    }
}

// Replace WooCommerce Admin Coupon product categories restictions section with a custom one
add_action( 'woocommerce_coupon_options_usage_restriction', 'action_coupon_options_usage_restriction', 10, 2 );
function action_coupon_options_usage_restriction( $coupon_id, $coupon ) {
    echo '<div class="options_group">';

    // Categories.
    ?>
    <p class="form-field">
        <label for="product_categories2"><?php _e( 'Product categories', 'woocommerce' ); ?></label>
        <select id="product_categories2" name="product_categories[]" style="width: 50%;"  class="wc-enhanced-select" multiple="multiple" data-placeholder="<?php esc_attr_e( 'Any category', 'woocommerce' ); ?>">
            <?php
            $category_ids = $coupon->get_product_categories( 'edit' );
            $categories   = get_terms( 'product_cat', 'orderby=name&hide_empty=0' );

            if ( $categories ) {
                foreach ( $categories as $cat ) {
                    echo '<option value="' . esc_attr( $cat->term_id ) . '"' . wc_selected( $cat->term_id, $category_ids ) . '>' . prepend_parent_term_name( $cat ) . '</option>';
                }
            }
            ?>
        </select> <?php echo wc_help_tip( __( 'Product categories that the coupon will be applied to, or that need to be in the cart in order for the "Fixed cart discount" to be applied.', 'woocommerce' ) ); ?>
    </p>

    <?php // Exclude Categories. ?>
    <p class="form-field">
        <label for="exclude_product_categories2"><?php _e( 'Exclude categories', 'woocommerce' ); ?></label>
        <select id="exclude_product_categories2" name="exclude_product_categories[]" style="width: 50%;"  class="wc-enhanced-select" multiple="multiple" data-placeholder="<?php esc_attr_e( 'No categories', 'woocommerce' ); ?>">
            <?php
            $category_ids = $coupon->get_excluded_product_categories( 'edit' );
            $categories   = get_terms( 'product_cat', 'orderby=name&hide_empty=0' );

            if ( $categories ) {
                foreach ( $categories as $cat ) {
                    echo '<option value="' . esc_attr( $cat->term_id ) . '"' . wc_selected( $cat->term_id, $category_ids ) . '>' . prepend_parent_term_name( $cat ) . '</option>';
                }
            }
            ?>
        </select>
        <?php echo wc_help_tip( __( 'Product categories that the coupon will not be applied to, or that cannot be in the cart in order for the "Fixed cart discount" to be applied.', 'woocommerce' ) ); ?>
    </p>
    <?php // Removing default product categories restrictions html  ?>
    <script>
    jQuery(function($){
        $('#product_categories').parent().parent().remove();
    });
    </script>
    <?php 
    echo '</div>';
}