Allow special access to bulk management tools (#165)

Access is configured on a per-course-run basis
via the new setting:
`BULK_MANAGEMENT_SPECIAL_ACCESS_COURSE_IDS`

TNL-7901

.env

@@ -31,3 +31,5 @@ ENTERPRISE_MARKETING_URL=null,
 ENTERPRISE_MARKETING_UTM_SOURCE=null,
 ENTERPRISE_MARKETING_UTM_CAMPAIGN=null,
 ENTERPRISE_MARKETING_FOOTER_UTM_MEDIUM=null,
+
+BULK_MANAGEMENT_SPECIAL_ACCESS_COURSE_IDS=null,

.env.development

@@ -38,3 +38,5 @@ ENTERPRISE_MARKETING_URL='http://example.com'
 ENTERPRISE_MARKETING_UTM_SOURCE='example.com'
 ENTERPRISE_MARKETING_UTM_CAMPAIGN='example.com Referral'
 ENTERPRISE_MARKETING_FOOTER_UTM_MEDIUM='Footer'
+
+BULK_MANAGEMENT_SPECIAL_ACCESS_COURSE_IDS=null

src/containers/GradebookPage/index.jsx

@@ -28,6 +28,7 @@ import {
   formatMaxCourseGrade,
 } from '../../data/selectors/grades';
 import { selectableAssignmentLabels } from '../../data/selectors/filters';
+import { hasSpecialBulkManagementAccess } from '../../data/selectors/special';
 import { getCohortNameById } from '../../data/selectors/cohorts';
 import { fetchAssignmentTypes } from '../../data/actions/assignmentTypes';
 import { getRoles } from '../../data/actions/roles';
@@ -97,7 +98,10 @@ const mapStateToProps = (state, ownProps) => (
     selectedCohort: state.filters.cohort,
     selectedAssignmentType: state.filters.assignmentType,
     selectedAssignment: (state.filters.assignment || {}).label,
-    showBulkManagement: stateHasMastersTrack(state) && state.config.bulkManagementAvailable,
+    showBulkManagement: (
+      hasSpecialBulkManagementAccess(ownProps.match.params.courseId)
+      || (stateHasMastersTrack(state) && state.config.bulkManagementAvailable)
+    ),
     showSpinner: shouldShowSpinner(state),
     showSuccess: state.grades.showSuccess,
     totalUsersCount: state.grades.totalUsersCount,

src/data/selectors/special.js

@@ -0,0 +1,12 @@
+// Certain course runs may be expressly allowed to view the
+// bulk management tools, bypassing the other checks.
+// Note that this does not affect whether or not the backend
+// LMS API will permit usage of the tool.
+
+const hasSpecialBulkManagementAccess = courseId => {
+  const specialIdList = process.env.BULK_MANAGEMENT_SPECIAL_ACCESS_COURSE_IDS || '';
+  return specialIdList.split(',').includes(courseId);
+};
+
+export { hasSpecialBulkManagementAccess };
+export default hasSpecialBulkManagementAccess;