"""Module containing the middleware that processes exceptions for PyTask.

"""

__authors__ = [

    '"Madhusudan.C.S" <madhusudancs@fossee.in>',

    ]

from django.http import HttpResponse

from django.template import loader

from django.template import RequestContext

from pytask.helpers.exceptions import UnauthorizedAccess

class ExceptionMiddleware(object):

    """Middleware definition that processes exceptions raised in PyTaskViews.

    """

    def process_exception(self, request, exception):

        """Process the exception raised.

        """

        if isinstance(exception, UnauthorizedAccess):

            template = loader.get_template('error.html')

            context = RequestContext(request, {

              'error_message': exception.message

              })

            return HttpResponse(template.render(context))

        # let Django handle it

        return None