from MoinMoin.multiconfig import DefaultConfig
from MoinMoin import config, user

def vrc_http(request, **kw):
    """ authenticate via http basic/digest/ntlm auth """
    from MoinMoin.request import RequestTwisted, RequestCLI
    user_obj = kw.get('user_obj')
    u = None
    # check if we are running Twisted
    if isinstance(request, RequestTwisted):
        username = request.twistd.getUser().decode(config.charset)
        password = request.twistd.getPassword().decode(config.charset)
        # when using Twisted http auth, we use username and password from
        # the moin user profile, so both can be changed by user.
        u = user.User(request, auth_username=username, password=password,
                      auth_method='http', auth_attribs=())

    elif not isinstance(request, RequestCLI):
        env = request.env
        auth_type = env.get('AUTH_TYPE','')
        if auth_type in ['Basic', 'Digest', 'NTLM', 'Negotiate',]:
            username = env.get('REMOTE_USER', '').decode(config.charset)
            if auth_type in ('NTLM', 'Negotiate'):
                # converting to standard case so the user can even enter wrong case
                # (added since windows does not distinguish between e.g.
                #  "Mike" and "mike")
                username = username.split('\\')[-1] # split off domain e.g.
                                                    # from DOMAIN\user
                                                    
                #if this username is in Firstname.Lastname format, then we split
                # it and .title both items and glue them together
                username_parts = username.split('.')
                if len(username_parts) >= 2:
                    username = reduce(lambda x, y: x.title() + y.title(), username_parts)
                else:                                                    
                    # this "normalizes" the login name from {meier, Meier, MEIER} to Meier
                    # put a comment sign in front of next line if you don't want that:
                    username = username.title()
                
            # when using http auth, we have external user name and password,
            # we don't use the moin user profile for those attributes.
            u = user.User(request, auth_username=username,
                          auth_method='http', auth_attribs=('name', 'password'))

    if u:
        u.create_or_update()
    if u and u.valid:
        return u, True # True to get other methods called, too
    else:
        return user_obj, True