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authentik/passbook/core/api/applications.py

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"""Application API Views"""
from django.db.models import QuerySet
from rest_framework.request import Request
from rest_framework.response import Response
from rest_framework.serializers import ModelSerializer
from rest_framework.viewsets import ModelViewSet
from rest_framework_guardian.filters import ObjectPermissionsFilter
from passbook.core.models import Application
from passbook.policies.engine import PolicyEngine
class ApplicationSerializer(ModelSerializer):
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"""Application Serializer"""
class Meta:
model = Application
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fields = [
"pk",
"name",
"slug",
"provider",
"meta_launch_url",
"meta_icon",
"meta_description",
"meta_publisher",
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"policies",
]
class ApplicationViewSet(ModelViewSet):
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"""Application Viewset"""
queryset = Application.objects.all()
serializer_class = ApplicationSerializer
lookup_field = "slug"
def _filter_queryset_for_list(self, queryset: QuerySet) -> QuerySet:
"""Custom filter_queryset method which ignores guardian, but still supports sorting"""
for backend in list(self.filter_backends):
if backend == ObjectPermissionsFilter:
continue
queryset = backend().filter_queryset(self.request, queryset, self)
return queryset
def list(self, request: Request, *_, **__) -> Response:
"""Custom list method that checks Policy based access instead of guardian"""
queryset = self._filter_queryset_for_list(self.get_queryset())
allowed_applications = []
for application in queryset.order_by("name"):
engine = PolicyEngine(application, self.request.user, self.request)
engine.build()
if engine.passing:
allowed_applications.append(application)
serializer = self.get_serializer(allowed_applications, many=True)
return Response(serializer.data)