##################
django-allauth-ens
##################

This package is meant to ease the management of authentication of django-apps
at the ENS.

On top of django-allauth_, which provides easy ways to configure the
authentication of django-apps, this package provides:

* social authentication using Clipper (*cas.eleves*);

* ready-to-use templates in replacement of allauth' ones;

* helpers to use *allauth*'s login and logout views instead of those
  provided by third-parties (Django admin, wagtail, *etc*).


**Contents**

.. contents:: :local:


************
Installation
************

First, `install django-allauth`_.

Then, install *django-allauth-ens*:

.. code-block:: bash

  $ pip install django-allauth-ens

And edit your settings file:

.. code-block:: python

  INSTALLED_APPS = [
      # …

      # Above allauth to replace its templates.
      'allauth_ens',

      # Added when you installed allauth.
      'allauth',
      'allauth.account',
      'allauth.socialaccount',

      # Required to use CAS-based providers (e.g. Clipper).
      'allauth_cas',

      # …
  ]


*************
Configuration
*************

See also the `allauth configuration`_ and `advanced usage`_ docs pages.

``ACCOUNT_HOME_URL``
  *Optional* — A view name or an url path.

  Used as a link from the templates of ``allauth_ens`` to return to your
  application.

  **Examples:** ``'home'``, ``'/home/'``

``ACCOUNT_DETAILS_URL``
  *Optional* — A view name or an url path.

  Used as a link from the templates of ``allauth_ens`` for a logged in user to
  access their profile in your app.

  **Examples:** ``'my-account'``, ``'/my-account/'``

*****
Views
*****

Capture other login and logout views
====================================

You can use the ``capture_login`` and ``capture_logout`` views to replace the
login and logout views of other applications. They redirect to their similar
*allauth*'s view and forward the query string, so that if a GET parameter
``next`` is given along the initial request, user is redirected to this url on
successful login and logout.

If you need to do this for the admin site, you shoud use
``capture_login_admin`` instead, performing checks to avoid redirection loops.

This requires to add urls before the include of the app' urls.

For example, to replace the Django admin login and logout views with allauth's
ones:

.. code-block:: python

  from allauth_ens.views import capture_login_admin, capture_logout

  urlpatterns = [
      # …

      # Add it before include of admin urls.
      url(r'^admin/login/$', capture_login_admin),
      url(r'^admin/logout/$', capture_logout),

      url(r'^admin/$', include(admin.site.urls)),

      # …
  ]


*********
Templates
*********

The templates provided by *allauth* only contains the bare minimum. Hopefully,
this package includes ready-to-use templates. They are automatically used if
you put ``'allauth_ens'`` before ``'allauth'`` in your ``INSTALLED_APPS``,


*********
Providers
*********

*Google, Facebook¸ but also Clipper…*

To interact with an external authentication service, you must add the
corresponding provider application to your ``INSTALLED_APPS``.

*allauth* already includes `several providers`_ (see also `their python path`_).
In addition to that, this package adds the following providers:

Clipper
=======

It uses the CAS server `<https://cas.eleves.ens.fr/>`_.

Installation
  Add ``'allauth_ens.providers.clipper'`` to the ``INSTALLED_APPS``.

Configuration
  Available settings and their default value:

  .. code-block:: python

    SOCIALACCOUNT_PROVIDERS = {
        # …

        'clipper': {

            # These settings control whether a message containing a link to
            # disconnect from the CAS server is added when users log out.
            'MESSAGE_SUGGEST_LOGOUT_ON_LOGOUT': True,
            'MESSAGE_SUGGEST_LOGOUT_ON_LOGOUT_LEVEL': messages.INFO,

        },
    }

Auto-signup
  Poulated data
    - username: ``<clipper>``
    - email (primary and verified): ``<clipper>@clipper.ens.fr``


*********
Demo Site
*********

See ``example/README``.


***********
Development
***********

First, you need to clone the repository.

Stylesheets
===========

This project uses `compass`_ to compile SCSS files to CSS.

Using bundler
-------------

Requirements
  * Ensure Ruby is installed (``$ ruby -v``) or `install Ruby`_
  * Ensure bundler is installed (``$ bundle -v``) or install bundler
    (``$ gem install bundler``)
  * Install dependencies: ``$ bundle install``

Compile
  * Watch changes and recompile: ``$ bundle exec compass watch``

Tests
=====

Local environment
-----------------

``$ ./runtests.py``

All
---

Requirements
  * tox, install with ``$ pip install tox``
  * ``python{2.7,3.4,3.5,3.6}`` must be available on your system path

Run
  * all (django/python with combined coverage + flake8 + isort): ``$ tox``


******
Howtos
******

Assuming you use the following settings (when needed):

.. code-block:: python

  ACCOUNT_ADAPTER = 'shared.allauth_adapter.AccountAdapter'
  SOCIALACCOUNT_ADAPTER = 'shared.allauth_adapter.SocialAccountAdapter'

Signup disabled, except for clipper provider (auto-signup)
==========================================================

In ``shared/allauth_adapter.py``:

.. code-block:: python

  class AccountAdapter(DefaultAccountAdapter):
      def is_open_for_signup(self, request):
          return False

  class SocialAccountAdapter(DefaultSocialAccountAdapter):
      def is_open_for_signup(self, request, sociallogin):
          # sociallogin.account is a SocialAccount instance.
          # See https://github.com/pennersr/django-allauth/blob/master/allauth/socialaccount/models.py

          if sociallogin.account.provider == 'clipper':
              return True

          # It returns AccountAdapter.is_open_for_signup().
          # See https://github.com/pennersr/django-allauth/blob/master/allauth/socialaccount/adapter.py
          return super().is_open_for_signup(request, sociallogin)


.. _django-allauth: https://django-allauth.readthedocs.io/en/latest/overview.html
.. _install django-allauth: https://django-allauth.readthedocs.io/en/latest/installation.html
.. _several providers: https://django-allauth.readthedocs.io/en/latest/providers.html
.. _allauth configuration: https://django-allauth.readthedocs.io/en/latest/configuration.html
.. _advanced usage: https://django-allauth.readthedocs.io/en/latest/advanced.html
.. _their python path: https://django-allauth.readthedocs.io/en/latest/installation.html
.. _compass: https://compass-style.org/
.. _install Ruby: https://www.ruby-lang.org/en/documentation/installation/