[Plugin: WordPress Admin Bar] Role Manager support

This is my current code, but it probably breaks for other who haven’t got Role Manager installed. The ‘iPhone’ part is to disable AB when viewing the blog on my iPhone ??

// Everything this plugin does is only for logged in users
		$role = get_role('administrator');
		if( !$role->has_cap('adminbar') ) {
			$role->add_cap('adminbar');
		}
		if ( !current_user_can('adminbar') OR (preg_match('/iPhone/i', $_SERVER['HTTP_USER_AGENT'], $match)) ) return;

I don’t see the need honestly.

It automatically adapts to each user’s role to only display the menus they are allowed to see.

As for particular people not wanting to be able to see it, if they visit the options page for the plugin, they can disable it for their account. ??

is it possible to add this only for a user? like the site admin and no other