from django.conf import settings
from django.http import Http404

from .views import page


class StaticPageFallbackMiddleware(object):
    "Like the Django's flatpage middleware"

    def process_response(self, request, response):
        if response.status_code != 404:
            return response  # No need to check for a flatpage for non-404 responses.
        try:
            return page(request, url=request.path_info)
        # Return the original response if any errors happened. Because this
        # is a middleware, we can't assume the errors will be caught elsewhere.
        except Http404:
            return response
        except Exception:
            if settings.DEBUG:
                raise
            return response
