41 lines
1.8 KiB
Python
41 lines
1.8 KiB
Python
"""
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Middleware for Language Preferences
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"""
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from openedx.core.djangoapps.user_api.preferences.api import get_user_preference
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from lang_pref import LANGUAGE_KEY
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from django.utils.translation import LANGUAGE_SESSION_KEY
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from django.utils.translation.trans_real import parse_accept_lang_header
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from lang_pref.api import released_languages
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class LanguagePreferenceMiddleware(object):
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"""
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Middleware for user preferences.
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Ensures that, once set, a user's preferences are reflected in the page
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whenever they are logged in.
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"""
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def process_request(self, request):
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"""
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If a user's UserPreference contains a language preference, use the user's preference.
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"""
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# If the user is logged in, check for their language preference
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if request.user.is_authenticated():
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# Get the user's language preference
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user_pref = get_user_preference(request.user, LANGUAGE_KEY)
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# Set it to the LANGUAGE_SESSION_KEY (Django-specific session setting governing language pref)
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if user_pref:
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request.session[LANGUAGE_SESSION_KEY] = user_pref
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else:
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# Setting the session language to the browser language, if it is supported.
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preferred_language = request.META.get('HTTP_ACCEPT_LANGUAGE', '')
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lang_headers = [seq[0] for seq in parse_accept_lang_header(preferred_language)]
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languages = released_languages()
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for browser_lang in lang_headers:
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if browser_lang in [seq[0] for seq in languages]:
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if request.session.get(LANGUAGE_SESSION_KEY, None) != browser_lang:
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request.session[LANGUAGE_SESSION_KEY] = unicode(browser_lang)
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break
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