Add product tag and category classes to loops + post classes

gistfile1.txt

/**
 * Code placed in theme functions.php
 */
add_filter( 'post_class', 'wc_product_tag_post_class', 20, 3 );

function wc_product_tag_post_class( $classes, $class = '', $post_id = '' ) {
	$tags = get_the_terms( $post_id, 'product_tag' );
	if ( ! empty( $tags ) ) {
		foreach ( $tags as $key => $value ) {
			$classes[] = 'product-tag-' . $value->slug;
		}
	}
	$categories = get_the_terms( $post_id, 'product_cat' );
	if ( ! empty( $categories ) ) {
		$slugs = wp_list_pluck( $categories, 'slug' );
		foreach ( $slugs as $slug ) {
			$classes[] = 'product-cat-' . $slug;
		}
	}	
}