Source code for ferrosoft.apps.ferrobase.middleware.language

from asgiref.sync import iscoroutinefunction, markcoroutinefunction
from django.utils import translation




class UserLanguageMiddleware:
    """Middleware that activates the authenticated user's preferred language for each request.

    Reads ``user.language.iso_code`` and calls ``django.utils.translation.activate``
    so that all subsequent ``gettext`` calls in the request–response cycle use
    the user's chosen locale.  Unauthenticated or language-less users receive
    Django's default language.
    """

    async_capable = True
    sync_capable = True

    def __init__(self, get_response):
        self.get_response = get_response
        if iscoroutinefunction(self.get_response):
            markcoroutinefunction(self)

    async def __call__(self, request):
        """
        Set current language to language preferred by user.
        """
        await self._patch_request(request)
        return await self.get_response(request)

    @staticmethod
    async def _patch_request(request):
        user = await request.auser()
        if user is None:
            return
        language = getattr(user, "language", None)
        if language is not None:
            translation.activate(language.iso_code)
            request.LANGUAGE_CODE = translation.get_language()