public function css_class($append = array())
{
$classes = $append;
$classes[] = 'post';
$classes[] = 'post-' . $this->id;
$classes[] = 'type-' . $this->typename;
$classes[] = 'status-' . $this->statusname;
foreach ($this->tags as $tag) {
$classes[] = 'tag-' . $tag->term;
}
return implode(' ', $classes);
}