feat: Allow instructors to set rejected courses to draft and explicitly set course status to rejected upon administrative rejection.

Backend/src/services/AdminCourseApproval.service.ts

@@ -300,11 +300,11 @@ export class AdminCourseApprovalService {
             }
 
             await prisma.$transaction([
-                // Update course status back to DRAFT
+                // Update course status back to REJECTED
                 prisma.course.update({
                     where: { id: courseId },
                     data: { 
-                        status: 'DRAFT',
+                        status: 'REJECTED',
                         rejection_reason: comment,
                         approved_by: null,
                         approved_at: null
@@ -318,7 +318,7 @@ export class AdminCourseApprovalService {
                         reviewed_by: decoded.id,
                         action: 'REJECTED',
                         previous_status: course.status,
-                        new_status: 'DRAFT',
+                        new_status: 'REJECTED',
                         comment: comment
                     }
                 })
@@ -331,7 +331,7 @@ export class AdminCourseApprovalService {
                 entityType: 'Course',
                 entityId: courseId,
                 oldValue: { status: 'PENDING' },
-                newValue: { status: 'DRAFT' },
+                newValue: { status: 'REJECTED' },
                 metadata: { comment: comment }
             });
 

Backend/src/services/CoursesInstructor.service.ts

@@ -33,6 +33,8 @@ import {
     GetEnrolledStudentDetailInput,
     GetEnrolledStudentDetailResponse,
     GetCourseApprovalHistoryResponse,
+    setCourseDraft,
+    setCourseDraftResponse,
 } from "../types/CoursesInstructor.types";
 import { auditService } from './audit.service';
 import { AuditAction } from '@prisma/client';
@@ -327,6 +329,28 @@ export class CoursesInstructorService {
         }
     }
 
+    static async setCourseDraft(setCourseDraft: setCourseDraft): Promise<setCourseDraftResponse> {
+        try {
+            await this.validateCourseInstructor(setCourseDraft.token, setCourseDraft.course_id);
+            await prisma.course.update({
+                where: {
+                    id: setCourseDraft.course_id,
+                    status: 'REJECTED'
+                },
+                data: {
+                    status: 'DRAFT'
+                }
+            });
+            return {
+                code: 200,
+                message: 'Set course to draft successfully',
+            };
+        } catch (error) {
+            logger.error('Failed to set course to draft', { error });
+            throw error;
+        }
+    }
+
     static async getCourseApprovals(token: string, courseId: number): Promise<{
         code: number;
         message: string;