+
−"""
+
−A set of request processors that return dictionaries to be merged into a
+
−template context. Each function takes the request object as its only parameter
+
−and returns a dictionary to add to the context.
+
−
+
−These are referenced from the setting TEMPLATE_CONTEXT_PROCESSORS and used by
+
−RequestContext.
+
−"""
+
−
+
−from django.conf import settings
+
−
+
−def auth(request):
+
−    """
+
−    Returns context variables required by apps that use Django's authentication
+
−    system.
+
−
+
−    If there is no 'user' attribute in the request, uses AnonymousUser (from
+
−    django.contrib.auth).
+
−    """
+
−    if hasattr(request, 'user'):
+
−        user = request.user
+
−    else:
+
−        from django.contrib.auth.models import AnonymousUser
+
−        user = AnonymousUser()
+
−    return {
+
−        'user': user,
+
−        'messages': user.get_and_delete_messages(),
+
−        'perms': PermWrapper(user),
+
−    }
+
−
+
−def debug(request):
+
−    "Returns context variables helpful for debugging."
+
−    context_extras = {}
+
−    if settings.DEBUG and request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS:
+
−        context_extras['debug'] = True
+
−        from django.db import connection
+
−        context_extras['sql_queries'] = connection.queries
+
−    return context_extras
+
−
+
−def i18n(request):
+
−    from django.utils import translation
+
−
+
−    context_extras = {}
+
−    context_extras['LANGUAGES'] = settings.LANGUAGES
+
−    context_extras['LANGUAGE_CODE'] = translation.get_language()
+
−    context_extras['LANGUAGE_BIDI'] = translation.get_language_bidi()
+
−
+
−    return context_extras
+
−
+
−def media(request):
+
−    """
+
−    Adds media-related context variables to the context.
+
−
+
−    """
+
−    return {'MEDIA_URL': settings.MEDIA_URL}
+
−
+
−def request(request):
+
−    return {'request': request}
+
−
+
−# PermWrapper and PermLookupDict proxy the permissions system into objects that
+
−# the template system can understand.
+
−
+
−class PermLookupDict(object):
+
−    def __init__(self, user, module_name):
+
−        self.user, self.module_name = user, module_name
+
−
+
−    def __repr__(self):
+
−        return str(self.user.get_all_permissions())
+
−
+
−    def __getitem__(self, perm_name):
+
−        return self.user.has_perm("%s.%s" % (self.module_name, perm_name))
+
−
+
−    def __nonzero__(self):
+
−        return self.user.has_module_perms(self.module_name)
+
−
+
−class PermWrapper(object):
+
−    def __init__(self, user):
+
−        self.user = user
+
−
+
−    def __getitem__(self, module_name):
+
−        return PermLookupDict(self.user, module_name)
+
−        
+
−    def __iter__(self):
+
−        # I am large, I contain multitudes.
+
−        raise TypeError("PermWrapper is not iterable.")