A simple header w/context processor

header_context_processor.py

def topbar_pack(current_user):
    if current_user.get_id():
        nav_pack = nav_in_pack()
        user_pack = user_in_pack()
    else:
        nav_pack = nav_out_pack()
        user_pack = user_out_pack()
    tp = get_template_attribute('macros/topbar.html', 'topbar')
    return tp(nav_pack, user_pack, current_user)

def _topbar_pack():
    return dict(topbar_pack = topbar_pack(current_user))

BLUEPRINT.app_context_processor(_topbar_pack)