:py:mod:`oioioi.contestexcl.middleware`
=======================================

.. py:module:: oioioi.contestexcl.middleware


Module Contents
---------------

Classes
~~~~~~~

.. autoapisummary::

   oioioi.contestexcl.middleware.ExclusiveContestsMiddleware




.. py:class:: ExclusiveContestsMiddleware(get_response)

   Bases: :py:obj:`oioioi.base.utils.ObjectWithMixins`

   Middleware which checks whether the user participate in an
   exclusive contest, which is a contest that blocks other contests,
   and sets the current contest to that contest.

   It works as follows:

   #. If ONLY_DEFAULT_CONTEST is set, only the default contest is taken
      into account.
   #. All contests with active
      :class:`~oioioi.contestexcl.models.ExclusivenessConfig` instance are
      acquired from the database.
   #. They are filtered with a special selector function, which by default
      checks if the user is not a contest admin. In addition,
      ``process_view`` accepts another selector function as an argument.
      If it is present, the contest list is filtered with a logical
      conjunction of the default selector and the selector passed
      as an argument (it may be useful with mixins).
   #. If there is only one contest left, the ``request.contest`` variable
      is set to this contest or a redirect is made if necessary.
   #. If there is more than one contest left, the user is logged out,
      an error message is displayed and an e-mail describing the situation
      is sent to the administrators.

   .. py:method:: __call__(request)


   .. py:method:: process_view(request, view_func, view_args, view_kwargs, selector=None)


   .. py:method:: _check_requirements(request)


   .. py:method:: _send_error_email(request, contests)


   .. py:method:: _error_email_message(context)


   .. py:method:: _error_email_context(request, contests)