feat: add source_system to enrollments (#34540)

* feat: add source_system to enrollments

lms/djangoapps/support/tests/test_views.py

@@ -355,6 +355,7 @@ class SupportViewEnrollmentsTests(SharedModuleStoreTestCase, SupportViewTestCase
                 CourseMode.PROFESSIONAL, CourseMode.CREDIT_MODE} == {mode['slug'] for mode in data[0]['course_modes']}
         assert 'enterprise_course_enrollments' not in data[0]
         assert data[0]['order_number'] == ''
+        assert data[0]['source_system'] == ''
 
     @ddt.data(*itertools.product(['username', 'email'], [(3, 'ORD-003'), (1, 'ORD-001')]))
     @ddt.unpack
@@ -376,6 +377,23 @@ class SupportViewEnrollmentsTests(SharedModuleStoreTestCase, SupportViewTestCase
         assert len(data) == 1
         assert data[0]['order_number'] == order_details[1]
 
+    def test_order_source_system_information(self):
+        CourseEnrollmentAttributeFactory(
+            enrollment=self.enrollment,
+            namespace='order',
+            name='source_system',
+            value='commercetools'
+        )
+        url = reverse(
+            'support:enrollment_list',
+            kwargs={'username_or_email': self.student.username}
+        )
+        response = self.client.get(url)
+        assert response.status_code == 200
+        data = json.loads(response.content.decode('utf-8'))
+        assert len(data) == 1
+        assert data[0]['source_system'] == 'commercetools'
+
     @override_settings(FEATURES=dict(ENABLE_ENTERPRISE_INTEGRATION=True))
     @enterprise_is_enabled()
     def test_get_enrollments_enterprise_enabled(self):

lms/djangoapps/support/views/enrollments.py

@@ -123,6 +123,7 @@ class EnrollmentSupportListView(GenericAPIView):
             self.include_verified_mode_info(enrollment, course_key)
             # Add order number associated with the enrollment if available
             self.include_order_number(enrollment)
+            self.include_source_system(enrollment)
             # Add manual enrollment history, if it exists
             enrollment['manual_enrollment'] = self.manual_enrollment_data(enrollment, course_key)
 
@@ -290,6 +291,25 @@ class EnrollmentSupportListView(GenericAPIView):
             )
         enrollment['order_number'] = order_attribute[-1] if order_attribute else ''
 
+    @staticmethod
+    def include_source_system(enrollment):
+        """
+        For a provided enrollment data dictionary, include source_system from CourseEnrollmentAttribute if available.
+
+        From all the attributes of a course enrollment:
+
+          * Filter source_system attribute namespaced under `order`
+        """
+        username = enrollment['user']
+        course_id = enrollment['course_id']
+        enrollment_attributes = get_enrollment_attributes(username, course_id)
+        source_system = ''
+        for attribute in enrollment_attributes:
+            if attribute['namespace'] == 'order' and attribute['name'] == 'source_system':
+                source_system = attribute.get('value', '')
+                break
+        enrollment['source_system'] = source_system
+
     @staticmethod
     def manual_enrollment_data(enrollment_data, course_key):
         """