public static function instantiate(User $user, $parent, $data)
{
$instance = new self();
$instance->author()->associate($user);
if ($parent instanceof Post) {
$instance->post()->associate($parent);
} elseif ($parent instanceof Comment) {
$instance->post_id = $parent->post_id;
}
$instance->fill($data)->save();
if ($parent instanceof Comment) {
$instance->makeChildOf($parent);
}
return $instance;
}
