{
				return $product_visibility_terms[ 'rated-' . $rating ];
			},
			$parsed_filter_rating_values
		);

		return array(
			'tax_query' => array(
				array(
					'field'         => 'term_taxonomy_id',
					'taxonomy'      => 'product_visibility',
					'terms'         => $rating_terms,
					'operator'      => 'IN',
					'rating_filter' => true,
				),
			),
		);
	}


	/**
	 * Return a query to filter products by taxonomies (product categories, product tags, etc.)
	 *
	 * For example:
	 * User could provide "Product Categories" using "Filters" ToolsPanel available in Inspector Controls.
	 * We use this function to extract it's query from $tax_query.
	 *
	 * For example, this is how the query for product categories will look like in $tax_query array:
	 * Array
	 *    (
	 *        [taxonomy] => product_cat
	 *        [terms] => Array
	 *            (
	 *                [0] => 36
	 *            )
	 *    )
	 *
	 * For product categories, taxonomy would be "product_tag"
	 *
	 * @param array $query WP_Query.
	 * @return array Query to filter products by taxonomies.
	 */
	private function get_filter_by_taxonomies_query( $query ): array {
		if ( ! isset( $query['tax_query'] ) || ! is_array( $query['tax_query'] ) ) {
			return [];
		}

		$tax_query = $query['tax_query'];
		/**
		 * Get an array of taxonomy names associated with the "product" post type because
		 * we also want to include custom taxonomies associated with the "product" post type.
		 */
		$product_taxonomies = get_taxonomies( array( 'object_type' => array( 'product' ) ), 'names' );
		$result             = array_filter(
			$tax_query,
			function( $item ) use ( $product_taxonomies ) {
				return isset( $item['taxonomy'] ) && in_array( $item['taxonomy'], $product_taxonomies, true );
			}
		);

		return ! empty( $result ) ? [ 'tax_query' => $result ] : [];
	}

	/**
	 * Returns the keyword filter from the given query.
	 *
	 * @param WP_Query $query The query to extract the keyword filter from.
	 * @return array The keyword filter, or an empty array if none is found.
	 */
	private function get_filter_by_keyword_query( $query ): array {
		if ( ! is_array( $query ) ) {
			return [];
		}

		if ( isset( $query['s'] ) ) {
			return [ 's' => $query['s'] ];
		}

		return [];
	}
}