# Path: netauth/settings.py
# REGISTRATION_ALLOWED = getattr(settings, "NETAUTH_REGISTRATION_ALLOWED", True)
# AX_URIS = getattr(settings, "NETAUTH_AX_URIS", {
#     'nickname': 'http://axschema.org/namePerson/friendly',
#     'email': 'http://axschema.org/contact/email',
#     'fullname': 'http://axschema.org/namePerson',
#     'dob': 'http://axschema.org/birthDate',
#     'gender': 'http://axschema.org/person/gender',
#     'postcode': 'http://axschema.org/contact/postalCode/home',
#     'country': 'http://axschema.org/contact/country/home',
#     'language': 'http://axschema.org/pref/language',
#     'timezone': 'http://axschema.org/pref/timezone',
# })
# BACKEND_MAPPING = getattr(settings, "NETAUTH_BACKEND_MAPPING", {
#     'openid': 'netauth.backends.openid.OpenIDBackend',
#     'google': 'netauth.backends.google.GoogleBackend',
#     'twitter': 'netauth.backends.oauth.OAuthBackend',
#     'facebook': 'netauth.backends.facebook.FacebookBackend',
#     'friendfeed': 'netauth.backends.oauth.OAuthBackend',
#     'vkontakte': 'netauth.backends.vkontakte.VkontakteBackend',
#     'yandex': 'netauth.backends.yandex.YandexBackend',
#     }
# )
# REGISTRATION_DISABLED_REDIRECT = getattr(settings, "NETAUTH_REGISTRATION_DISABLED_REDIRECT", "/")
# ACTIVATION_REQUIRED = getattr(settings, "NETAUTH_ACTIVATION_REQUIRED", False)
# ACTIVATION_REDIRECT_URL = getattr(settings, "NETAUTH_ACTIVATION_REDIRECT_URL", "/")
# EXTRA_FORM = getattr(settings, "NETAUTH_EXTRA_FORM", "netauth.forms.ExtraForm")
# ACCEPT_EXTRA_FORM = getattr(settings, "NETAUTH_ACCEPT_EXTRA_FORM", True)
# DEFAULT_FROM_EMAIL = getattr(settings, "DEFAULT_FROM_EMAIL")
# LOGIN_REDIRECT_URL = getattr(settings, "LOGIN_REDIRECT_URL")
# LOGOUT_URL = getattr(settings, "LOGOUT_URL")
# GOOGLE_PROFILE_MAPPING = getattr(settings, "GOOGLE_PROFILE_MAPPING", {
# })
# TWITTER_REQUEST_TOKEN_URL = getattr(settings, "TWITTER_REQUEST_TOKEN_URL", "http://twitter.com/oauth/request_token")
# TWITTER_ACCESS_TOKEN_URL = getattr(settings, "TWITTER_ACCESS_TOKEN_URL", "http://twitter.com/oauth/access_token")
# TWITTER_AUTHORIZE_URL = getattr(settings, "TWITTER_AUTHORIZE_URL", "http://twitter.com/oauth/authorize")
# TWITTER_API_URL = getattr(settings, "TWITTER_API_URL", "http://api.twitter.com/1/users/show.json?user_id=%s")
# TWITTER_PROFILE_MAPPING = getattr(settings, "TWITTER_PROFILE_MAPPING", {
#     'username': 'screen_name',
# })
# FACEBOOK_APPLICATION_ID = getattr(settings, "FACEBOOK_APPLICATION_ID", None)
# FACEBOOK_APPLICATION_SECRET = getattr(settings, "FACEBOOK_APPLICATION_SECRET", None)
# FACEBOOK_AUTHORIZE_URL = getattr(settings, "FACEBOOK_AUTHORIZE_URL", "https://graph.facebook.com/oauth/authorize")
# FACEBOOK_ACCESS_TOKEN_URL = getattr(settings, "FACEBOOK_ACCESS_TOKEN_URL", "https://graph.facebook.com/oauth/access_token")
# FACEBOOK_API_URL = getattr(settings, "FACEBOOK_API_URL", "https://graph.facebook.com/me")
# FACEBOOK_SCOPE = getattr(settings, "FACEBOOK_SCOPE", "")
# FACEBOOK_PROFILE_MAPPING = getattr(settings, "FACEBOOK_PROFILE_MAPPING", {
#     'username': 'last_name',
# })
# YANDEX_APPLICATION_ID = getattr(settings, "YANDEX_APPLICATION_ID", None)
# YANDEX_AUTHORIZE_URL =  getattr(settings, "YANDEX_AUTHORIZE_URL", "https://oauth.yandex.ru/authorize")
# YANDEX_API_URL = getattr(settings, "YANDEX_API_URL", "https://api-yaru.yandex.ru/me")
# YANDEX_PROFILE_MAPPING = getattr(settings, "YANDEX_PROFILE_MAPPING", {
#     'username': 'name',
# })
# VKONTAKTE_APPLICATION_ID = getattr(settings, "VKONTAKTE_APPLICATION_ID", None)
# VKONTAKTE_APPLICATION_SECRET = getattr(settings, "VKONTAKTE_APPLICATION_SECRET", None)
# VKONTAKTE_PROFILE_MAPPING = getattr(settings, "VKONTAKTE_PROFILE_MAPPING", {
#     'username': 'last_name',
# })
# SESSION_MAX_AGE = getattr(settings, "SESSION_MAX_AGE", 60 * 60 * 24 * 7 * 2)


import re
from django.core.exceptions import ImproperlyConfigured
from django.core.mail import send_mail
from django.template import Context
from django.template.loader import get_template
from django.utils.importlib import import_module
from netauth import settings
    return cls


def uri_to_username(uri):
    return re.sub('r[^0-9a-z]', '_', uri)


def get_instance_from_path(path, *args, **kwargs):
    """ Return an instance of a class, given the dotted
        Python import path (as a string) to the backend class.

        If the backend cannot be located (e.g., because no such module
        exists, or because the module does not contain a class of the
        appropriate name), ``django.core.exceptions.ImproperlyConfigured``
        is raised.
    """
    i = path.rfind('.')
    module, attr = path[:i], path[i+1:]
    try:
        mod = import_module(module)
    except ImportError, e:
        raise ImproperlyConfigured('Error loading registration backend %s: "%s"' % (module, e))
    try:
        backend_class = getattr(mod, attr)
    except AttributeError:
        raise ImproperlyConfigured('Module "%s" does not define a registration backend named "%s"' % (module, attr))

    return backend_class(*args, **kwargs)

def get_backend(name):

# Path: netauth/settings.py
# REGISTRATION_ALLOWED = getattr(settings, "NETAUTH_REGISTRATION_ALLOWED", True)
# AX_URIS = getattr(settings, "NETAUTH_AX_URIS", {
#     'nickname': 'http://axschema.org/namePerson/friendly',
#     'email': 'http://axschema.org/contact/email',
#     'fullname': 'http://axschema.org/namePerson',
#     'dob': 'http://axschema.org/birthDate',
#     'gender': 'http://axschema.org/person/gender',
#     'postcode': 'http://axschema.org/contact/postalCode/home',
#     'country': 'http://axschema.org/contact/country/home',
#     'language': 'http://axschema.org/pref/language',
#     'timezone': 'http://axschema.org/pref/timezone',
# })
# BACKEND_MAPPING = getattr(settings, "NETAUTH_BACKEND_MAPPING", {
#     'openid': 'netauth.backends.openid.OpenIDBackend',
#     'google': 'netauth.backends.google.GoogleBackend',
#     'twitter': 'netauth.backends.oauth.OAuthBackend',
#     'facebook': 'netauth.backends.facebook.FacebookBackend',
#     'friendfeed': 'netauth.backends.oauth.OAuthBackend',
#     'vkontakte': 'netauth.backends.vkontakte.VkontakteBackend',
#     'yandex': 'netauth.backends.yandex.YandexBackend',
#     }
# )
# REGISTRATION_DISABLED_REDIRECT = getattr(settings, "NETAUTH_REGISTRATION_DISABLED_REDIRECT", "/")
# ACTIVATION_REQUIRED = getattr(settings, "NETAUTH_ACTIVATION_REQUIRED", False)
# ACTIVATION_REDIRECT_URL = getattr(settings, "NETAUTH_ACTIVATION_REDIRECT_URL", "/")
# EXTRA_FORM = getattr(settings, "NETAUTH_EXTRA_FORM", "netauth.forms.ExtraForm")
# ACCEPT_EXTRA_FORM = getattr(settings, "NETAUTH_ACCEPT_EXTRA_FORM", True)
# DEFAULT_FROM_EMAIL = getattr(settings, "DEFAULT_FROM_EMAIL")
# LOGIN_REDIRECT_URL = getattr(settings, "LOGIN_REDIRECT_URL")
# LOGOUT_URL = getattr(settings, "LOGOUT_URL")
# GOOGLE_PROFILE_MAPPING = getattr(settings, "GOOGLE_PROFILE_MAPPING", {
# })
# TWITTER_REQUEST_TOKEN_URL = getattr(settings, "TWITTER_REQUEST_TOKEN_URL", "http://twitter.com/oauth/request_token")
# TWITTER_ACCESS_TOKEN_URL = getattr(settings, "TWITTER_ACCESS_TOKEN_URL", "http://twitter.com/oauth/access_token")
# TWITTER_AUTHORIZE_URL = getattr(settings, "TWITTER_AUTHORIZE_URL", "http://twitter.com/oauth/authorize")
# TWITTER_API_URL = getattr(settings, "TWITTER_API_URL", "http://api.twitter.com/1/users/show.json?user_id=%s")
# TWITTER_PROFILE_MAPPING = getattr(settings, "TWITTER_PROFILE_MAPPING", {
#     'username': 'screen_name',
# })
# FACEBOOK_APPLICATION_ID = getattr(settings, "FACEBOOK_APPLICATION_ID", None)
# FACEBOOK_APPLICATION_SECRET = getattr(settings, "FACEBOOK_APPLICATION_SECRET", None)
# FACEBOOK_AUTHORIZE_URL = getattr(settings, "FACEBOOK_AUTHORIZE_URL", "https://graph.facebook.com/oauth/authorize")
# FACEBOOK_ACCESS_TOKEN_URL = getattr(settings, "FACEBOOK_ACCESS_TOKEN_URL", "https://graph.facebook.com/oauth/access_token")
# FACEBOOK_API_URL = getattr(settings, "FACEBOOK_API_URL", "https://graph.facebook.com/me")
# FACEBOOK_SCOPE = getattr(settings, "FACEBOOK_SCOPE", "")
# FACEBOOK_PROFILE_MAPPING = getattr(settings, "FACEBOOK_PROFILE_MAPPING", {
#     'username': 'last_name',
# })
# YANDEX_APPLICATION_ID = getattr(settings, "YANDEX_APPLICATION_ID", None)
# YANDEX_AUTHORIZE_URL =  getattr(settings, "YANDEX_AUTHORIZE_URL", "https://oauth.yandex.ru/authorize")
# YANDEX_API_URL = getattr(settings, "YANDEX_API_URL", "https://api-yaru.yandex.ru/me")
# YANDEX_PROFILE_MAPPING = getattr(settings, "YANDEX_PROFILE_MAPPING", {
#     'username': 'name',
# })
# VKONTAKTE_APPLICATION_ID = getattr(settings, "VKONTAKTE_APPLICATION_ID", None)
# VKONTAKTE_APPLICATION_SECRET = getattr(settings, "VKONTAKTE_APPLICATION_SECRET", None)
# VKONTAKTE_PROFILE_MAPPING = getattr(settings, "VKONTAKTE_PROFILE_MAPPING", {
#     'username': 'last_name',
# })
# SESSION_MAX_AGE = getattr(settings, "SESSION_MAX_AGE", 60 * 60 * 24 * 7 * 2)


# Path: netauth/utils.py
import re
from django.core.exceptions import ImproperlyConfigured
from django.core.mail import send_mail
from django.template import Context
from django.template.loader import get_template
from django.utils.importlib import import_module
from netauth import settings

    return cls


def uri_to_username(uri):
    return re.sub('r[^0-9a-z]', '_', uri)


def get_instance_from_path(path, *args, **kwargs):
    """ Return an instance of a class, given the dotted
        Python import path (as a string) to the backend class.

        If the backend cannot be located (e.g., because no such module
        exists, or because the module does not contain a class of the
        appropriate name), ``django.core.exceptions.ImproperlyConfigured``
        is raised.
    """
    i = path.rfind('.')
    module, attr = path[:i], path[i+1:]
    try:
        mod = import_module(module)
    except ImportError, e:
        raise ImproperlyConfigured('Error loading registration backend %s: "%s"' % (module, e))
    try:
        backend_class = getattr(mod, attr)
    except AttributeError:
        raise ImproperlyConfigured('Module "%s" does not define a registration backend named "%s"' % (module, attr))

    return backend_class(*args, **kwargs)

def get_backend(name):

    return get_instance_from_path(settings.BACKEND_MAPPING[name], name)