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_service_path

from synnefo.lib import join_urls

def extend_path_with_slash(patterns_obj, path):

    if not path.endswith('/'):

        pattern = prefix_pattern(path, append_slash=False) + '$'

        entry = url(pattern, 'redirect_to', {'url': path + '/'})

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

def extend_endpoint_with_slash(patterns_obj, filled_services, service_type,

                               version=None):

    path = get_service_path(filled_services, service_type, version)

    extend_path_with_slash(patterns_obj, path)

def extend_with_root_redirects(patterns_obj, filled_services, service_type,

                               base_path, with_slash=True):

    """

    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_path = get_service_path(filled_services, service_type)

    if with_slash:

        service_path = service_path.rstrip('/') + '/'

    root_url_entry = None

    if base_path and base_path != '/':

        # redirect slash to /<base_path>/

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

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

                                               '/')})

    base_path_pattern = prefix_pattern(base_path) + '$'

    base_path_pattern_no_slash = prefix_pattern(base_path).rstrip('/') + '$'

    # redirect /<base_path> and /<base_path>/ to service_path public endpoint

    base_url_entry = url(base_path_pattern, 'redirect_to', {'url':

                                                            service_path})

    base_url_entry_no_slash = url(base_path_pattern_no_slash,

                                  'redirect_to', {'url': service_path})

    # 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, base_url_entry_no_slash)

    if root_url_entry:

        # register root entry only for non root base_path deployments

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