feat: add referrer url when submitting Zendesk support ticket (#29474)

* feat: add referrer url as a custom field when submitting zendesk support ticket

lms/djangoapps/support/static/support/jsx/single_support_form.jsx

@@ -142,10 +142,16 @@ class RenderForm extends React.Component {
           body: formData.message,
         },
         subject: formData.subject, // Zendesk API requires 'subject'
-        custom_fields: [{
+        custom_fields: [
+        {
           id: this.props.context.customFields.course_id,
           value: formData.course,
-        }],
+        },
+        {
+          id: this.props.context.customFields.referrer,
+          value: document.referrer ? document.referrer : "Direct Contact Us Page Request",
+        }
+        ],
         tags: this.props.context.tags,
       };
     request.open('POST', url, true);

openedx/core/djangoapps/zendesk_proxy/tests/test_v1_views.py

@@ -40,6 +40,10 @@ class ZendeskProxyTestCase(ApiTestCase):
                 {
                     'id': '001',
                     'value': 'demo-course'
+                },
+                {
+                    'id': '002',
+                    'value': 'https://www.example.com'
                 }
             ],
         }
@@ -74,7 +78,10 @@ class ZendeskProxyTestCase(ApiTestCase):
                     'comment': {
                         'body': "Help! I'm trapped in a unit test factory and I can't get out!", 'uploads': None
                     },
-                    'custom_fields': [{'id': '001', 'value': 'demo-course'}],
+                    'custom_fields': [
+                        {'id': '001', 'value': 'demo-course'},
+                        {'id': '002', 'value': 'https://www.example.com'},
+                    ],
                     'requester': {'email': self.user.email, 'name': self.user.username},
                     'subject': 'Python Unit Test Help Request', 'tags': ['python_unit_test']
                 }