EGroupware / egroupware

		static $um_cache = array();

		if ($user == $this->user) $user_and_memberships =& $um_cache[$user];

		if (!isset($user_and_memberships))

		{

			$user_and_memberships = $GLOBALS['egw']->accounts->memberships($user,true);

			$user_and_memberships[] = $user;

		}

		return $info['info_responsible'] && array_intersect((array)$info['info_responsible'],$user_and_memberships);

	}

		if (!is_array($event) && !($event = $this->read($event))) return false;

		// regular user and groups (need to check memberships too)

		if (!isset($event['participants'][$uid]))

		{

			$memberships = $GLOBALS['egw']->accounts->memberships($uid,true);

		}

		$memberships[] = $uid;

		return array_intersect($memberships, array_keys($event['participants'])) && $this->check_perms(EGW_ACL_EDIT,0,$uid);

	}