from Products.CMFCore.utils import getToolByName

def search(self,uid='sverbois'):

    pc = getToolByName(self, 'portal_catalog')
    au = getToolByName(self, 'acl_users')
    user = au.getUserById(uid)
    allowed_roles_and_users = pc._listAllowedRolesAndUsers(user)
    brains = pc.unrestrictedSearchResults(
        portal_type='Document',
        sort_on='created',
        sort_order='reverse',
        allowedRolesAndUsers=allowed_roles_and_users
        )

    return brains