Synnefo

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from django.conf.urls.defaults import url, patterns

from snf_django.lib.api.utils import prefix_pattern

from synnefo.lib.services import get_public_endpoint

from synnefo.lib import join_urls

def extend_with_root_redirects(patterns_obj, filled_services, service_type,

                               base_path):

    """

    Append additional redirect url entries for `/` and `/<base_path>` paths.

    `/` redirects to `/<base_path>` and `/<base_path>` to the resolved service

    type url.

    This is used in synnefo components root urlpatterns to append sane default

    redirects to the chosen service url.

    """

    service_url = get_public_endpoint(filled_services, service_type)

    root_url_entry = url('^$', 'redirect_to',

                         {'url': join_urls('/', base_path.rstrip('/'), '/')})

    base_url_entry = url(prefix_pattern(base_path) + '$', 'redirect_to',

                         {'url': service_url})

    # urls order matter. Setting base_url_entry first allows us to avoid

    # redirect loops when base_path is empty or `/`

    patterns_obj += patterns('django.views.generic.simple',

                             base_url_entry, root_url_entry)