invp_get_the_carfax_url_report( $post_ID = null )

function invp_get_the_carfax_url_report( $post_ID = null )
{
	if( empty( $post_ID ) )
	{
		$post_ID = get_the_ID();
	}

	$raw = INVP::get_meta( 'carfax_url_report', $post_ID );
	if( ! empty( $raw ) )
	{
		return $raw;
	}
	
	/**
	 * Fallback to the pre-August-2019 URLs, save for the partner 
	 * querystring parameter.
	 */
	return 'http://www.carfax.com/VehicleHistory/p/Report.cfx?vin=' . invp_get_the_VIN();
}