feat: grading rest api for authoring api (openedx#34854)

* feat: grading rest api for authoring api

* fix: doc string api path

cms/djangoapps/contentstore/rest_api/v0/serializers/__init__.py

@@ -3,6 +3,7 @@
 """
 from .advanced_settings import AdvancedSettingsFieldSerializer, CourseAdvancedSettingsSerializer
 from .assets import AssetSerializer
+from .authoring_grading import CourseGradingModelSerializer
 from .tabs import CourseTabSerializer, CourseTabUpdateSerializer, TabIDLocatorSerializer
 from .transcripts import TranscriptSerializer, YoutubeTranscriptCheckSerializer, YoutubeTranscriptUploadSerializer
 from .xblock import XblockSerializer

cms/djangoapps/contentstore/rest_api/v0/serializers/authoring_grading.py

@@ -0,0 +1,20 @@
+"""
+API Serializers for course grading
+"""
+
+from rest_framework import serializers
+
+
+class GradersSerializer(serializers.Serializer):
+    """ Serializer for graders """
+    type = serializers.CharField()
+    min_count = serializers.IntegerField()
+    drop_count = serializers.IntegerField()
+    short_label = serializers.CharField(required=False, allow_null=True, allow_blank=True)
+    weight = serializers.IntegerField()
+    id = serializers.IntegerField()
+
+
+class CourseGradingModelSerializer(serializers.Serializer):
+    """ Serializer for course grading model data """
+    graders = GradersSerializer(many=True, allow_null=True, allow_empty=True)

cms/djangoapps/contentstore/rest_api/v0/urls.py

@@ -7,6 +7,7 @@
 
 from .views import (
     AdvancedCourseSettingsView,
+    AuthoringGradingView,
     CourseTabSettingsView,
     CourseTabListView,
     CourseTabReorderView,
@@ -46,8 +47,8 @@
     ),
 
     # Authoring API
-    re_path(
-        r'^heartbeat$', APIHeartBeatView.as_view(), name='heartbeat'
+    path(
+        'heartbeat', APIHeartBeatView.as_view(), name='heartbeat'
     ),
     re_path(
         fr'^file_assets/{settings.COURSE_ID_PATTERN}$',
@@ -61,6 +62,10 @@
         fr'^videos/encodings/{settings.COURSE_ID_PATTERN}$',
         authoring_videos.VideoEncodingsDownloadView.as_view(), name='cms_api_videos_encodings'
     ),
+    re_path(
+        fr'grading/{settings.COURSE_ID_PATTERN}',
+        AuthoringGradingView.as_view(), name='cms_api_update_grading'
+    ),
     path(
         'videos/features',
         authoring_videos.VideoFeaturesView.as_view(), name='cms_api_videos_features'

cms/djangoapps/contentstore/rest_api/v0/views/__init__.py

@@ -2,6 +2,7 @@
 Views for v0 contentstore API.
 """
 from .advanced_settings import AdvancedCourseSettingsView
+from .authoring_grading import AuthoringGradingView
 from .tabs import CourseTabSettingsView, CourseTabListView, CourseTabReorderView
 from .transcripts import TranscriptView, YoutubeTranscriptCheckView, YoutubeTranscriptUploadView
 from .api_heartbeat import APIHeartBeatView

cms/djangoapps/contentstore/rest_api/v0/views/authoring_grading.py

@@ -0,0 +1,88 @@
+""" API Views for course advanced settings """
+
+import edx_api_doc_tools as apidocs
+from opaque_keys.edx.keys import CourseKey
+from rest_framework.request import Request
+from rest_framework.response import Response
+from rest_framework.views import APIView
+
+from cms.djangoapps.models.settings.course_grading import CourseGradingModel
+from common.djangoapps.student.auth import has_studio_read_access
+from openedx.core.djangoapps.credit.tasks import update_credit_course_requirements
+from openedx.core.lib.api.view_utils import DeveloperErrorViewMixin, verify_course_exists, view_auth_classes
+from ..serializers import CourseGradingModelSerializer
+
+
+@view_auth_classes(is_authenticated=True)
+class AuthoringGradingView(DeveloperErrorViewMixin, APIView):
+    """
+    View for getting and setting the advanced settings for a course.
+    """
+    @apidocs.schema(
+        body=CourseGradingModelSerializer,
+        parameters=[
+            apidocs.string_parameter("course_id", apidocs.ParameterLocation.PATH, description="Course ID"),
+        ],
+        responses={
+            200: CourseGradingModelSerializer,
+            401: "The requester is not authenticated.",
+            403: "The requester cannot access the specified course.",
+            404: "The requested course does not exist.",
+        },
+    )
+    @verify_course_exists()
+    def post(self, request: Request, course_id: str):
+        """
+        Update a course's grading.
+
+        **Example Request**
+
+            POST /api/contentstore/v0/course_grading/{course_id}
+
+        **POST Parameters**
+
+        The data sent for a post request should follow next object.
+        Here is an example request data that updates the ``course_grading``
+
+        ```json
+        {
+            "graders": [
+                {
+                    "type": "Homework",
+                    "min_count": 1,
+                    "drop_count": 0,
+                    "short_label": "",
+                    "weight": 100,
+                    "id": 0
+                }
+            ],
+            "grade_cutoffs": {
+                "A": 0.75,
+                "B": 0.63,
+                "C": 0.57,
+                "D": 0.5
+            },
+            "grace_period": {
+                "hours": 12,
+                "minutes": 0
+            },
+            "minimum_grade_credit": 0.7,
+            "is_credit_course": true
+        }
+        ```
+
+        **Response Values**
+
+        If the request is successful, an HTTP 200 "OK" response is returned,
+        """
+        course_key = CourseKey.from_string(course_id)
+
+        if not has_studio_read_access(request.user, course_key):
+            self.permission_denied(request)
+
+        if 'minimum_grade_credit' in request.data:
+            update_credit_course_requirements.delay(str(course_key))
+
+        updated_data = CourseGradingModel.update_from_json(course_key, request.data, request.user)
+        serializer = CourseGradingModelSerializer(updated_data)
+        return Response(serializer.data)