Course System Codemap

Architecture Overview

┌─────────────────────────────────────────────────────────────────┐
│  SERVER (NestJS) — single source of truth                       │
│  Route prefix: /course                                          │
│  4 controllers → 10 services → 12 entities → 26 DTOs           │
├─────────────────────────────────────────────────────────────────┤
│  FRONTENDS — each defines own types, consumes HTTP API          │
│  instructor/  editor + dashboard                                │
│  admin/       management + analytics                            │
│  student/     player + progress                                 │
│  public/      marketplace + search                              │
│  landing-page/ marketing                                        │
└─────────────────────────────────────────────────────────────────┘

Cross-package rule: No type imports between frontend packages. Each defines local interfaces.

1. Server: Course Module

Module: server/src/course/course.module.ts

1.1 Hierarchy

Course
  ├── CourseSection        (course_sections)
  │     └── CourseSubSection  (course_subsections)
  │           └── CourseItem     (course_items) — VIDEO, FILE, TEXT, etc.
  ├── Level                (levels)
  ├── CourseManager        (course_managers) — junction: instructor → course
  ├── Requirement          (course requirements with icon+text)
  ├── Inclusion            (course inclusions/benefits with icon+text)
  └── Audience             (target audience with icon+text)

1.2 Controllers

File: server/src/course/course.controller.ts — Route prefix /course

Method	Endpoint	Service	Description
`POST`	`/course`	`CourseWriteService.create`	Create course
`GET`	`/course`	`CourseReadService.findAll`	Paginated list, view-based serialization
`GET`	`/course/:id`	`CourseReadService.findOne`	By ID, `?view=admin\|dashboard\|public`
`GET`	`/course/slug/:slug`	`CourseReadService.findOne`	By slug, public access allowed
`PUT`	`/course/:id`	`CourseWriteService.update`	Update course
`DELETE`	`/course/:id`	`CourseWriteService.remove`	Hard delete
`PUT`	`/course/:id/visibility`	`CourseModerationService.updateCourseVisibility`	Admin only — `isFeatured`, `isHidden`
`GET`	`/course/:id/player`	`CoursePlayerService.getCourseForPlayer`	Student player with section locking
`GET`	`/course/:id/curriculum`	`CourseReadService.getNormalizedCurriculum`	Sections → subsections → items
`GET`	`/course/:id/performance`	`CourseModerationService.getCoursePerformance`	Analytics metrics
`GET`	`/course/summaries/:id`	`CourseModerationService.getCourseSummary`	Instructor summaries
`GET`	`/course/:id/statistics`	`CourseModerationService.getInstructorStatistics`	Instructor stats
`GET`	`/course/levels`	`CourseReadService.getAllLevels`	All levels
`POST`	`/course/levels`	`CourseReadService.createLevel`	Admin only

Section endpoints (nested under /course):

Method	Endpoint	Service
`GET`	`/course/section?courseId=`	`CourseSectionService.findAll`
`GET`	`/course/section/:sectionId`	`CourseSectionService.findOne`
`POST`	`/course/section`	`CourseSectionService.create`
`PUT`	`/course/section/:sectionId`	`CourseSectionService.update`
`DELETE`	`/course/section/:sectionId`	`CourseSectionService.remove`

Subsection endpoints:

Method	Endpoint	Service
`GET`	`/course/subsection?sectionId=`	`CourseSubSectionService.findAll`
`GET`	`/course/subsection/:subsectionId`	`CourseSubSectionService.findOne`
`POST`	`/course/subsection`	`CourseSubSectionService.create`
`PUT`	`/course/subsection/:subsectionId`	`CourseSubSectionService.update`
`DELETE`	`/course/subsection/:subsectionId`	`CourseSubSectionService.remove`
`POST`	`/course/subsection/batch-update-order`	`CourseSubSectionService.batchUpdateOrder`

Item endpoints:

Method	Endpoint	Service
`GET`	`/course/item?subsectionId=`	`CourseItemService.findAll`
`GET`	`/course/item/:courseItemId`	`CourseItemService.findOne`
`POST`	`/course/item`	`CourseItemService.create`
`PUT`	`/course/item/:courseItemId`	`CourseItemService.update`
`DELETE`	`/course/item/:courseItemId`	`CourseItemService.remove`
`GET`	`/course/download/:courseItemId`	`CourseItemService.downloadFile`
`POST`	`/course/item/:courseItemId/video/upload`	`CourseItemService.initVideoUpload` (Bunny TUS)
`POST`	`/course/item/:courseItemId/video/refresh`	`CourseItemService.refreshVideoUpload`
`GET`	`/course/item/:courseItemId/video`	`CourseItemService.getVideoPlayback`

Property endpoints (Requirements, Inclusions, Audiences):

Method	Endpoint
`GET`	`/course/:id/:type`
`GET`	`/course/:courseId/:type/:propId`
`POST`	`/course/:courseId/:type`
`PUT`	`/course/:courseId/:type/replace`
`PATCH`	`/course/:courseId/properties/:type/:propId`
`DELETE`	`/course/:courseId/:type/:propId`

Batch controller (batch-update.controller.ts):

Method	Endpoint
`PATCH`	`/course/batch/:courseId/sections`
`PATCH`	`/course/batch/:sectionId/subsections`
`PATCH`	`/course/batch/:subsectionId/items`

Course Manager controller (course-manager.controller.ts):

Method	Endpoint
`POST`	`/course-managers`
`GET`	`/course-managers/:id`
`GET`	`/course-managers/course/:courseId`
`GET`	`/course-managers/instructor/:instructorId`
`PUT`	`/course-managers/:id`
`DELETE`	`/course-managers/:id`

1.3 Services

Service	File	Key Methods
`CourseReadService`	`services/course-read.service.ts`	`findAll` (paginated, nestjs-paginate), `findOne` (by id/slug with view), `getAllLevels`, `createLevel`, `getNormalizedCurriculum`
`CourseWriteService`	`services/course-write.service.ts`	`create`, `update`, `remove` — emits `COURSE_UPDATED`, `COURSE_REMOVED` events
`CourseModerationService`	`services/course-moderation.service.ts`	`getCourseSummary`, `getInstructorStatistics`, `getCoursePerformance`, `updateCourseVisibility`
`CoursePlayerService`	`services/course-player.service.ts`	`getCourseForPlayer` — assembles player data with section locking, progress, pre-signed video URLs, enrollment validation
`CourseResponseService`	`services/course-response.service.ts`	`toResponseDto` — maps entities to response DTOs with serialization groups
`CourseSectionService`	`course-section.service.ts`	CRUD for sections, batch order update
`CourseSubSectionService`	`course-subsection.service.ts`	CRUD for subsections, batch order
`CourseItemService`	`course-item.service.ts`	CRUD for items, Bunny Stream video upload init/refresh/playback, file downloads
`CourseManagerService`	`course-manager.service.ts`	CRUD for course-instructor assignments
`ProgressService`	`progress.service.ts`	`trackProgress`, `getProgress`, `updateVideoProgress`, `markVideoCompleted`, `getCourseCompletionStatus`
`TimeCalculationService`	(in progress module)	Video time calculations

1.4 Entities

Course (entities/course.entity.ts) — Table: courses

Field	Type	Notes
`id`	UUID PK
`title`	string	Unique
`slug`	string	Unique, nullable
`subtitle`	string
`category`	Relation→Category
`subcategory`	Relation→Category
`level`	Relation→Level	Eager
`language`	string
`subtitleLanguage`	string
`publishStatus`	enum	DRAFT / PUBLISHED / ARCHIVED
`description`	string
`thumbnail`	Relation→File	OneToOne
`introductoryVideo`	Relation→File	OneToOne
`priceInCents`	int
`currency`	enum	USD default
`isFree`	boolean
`saleActive`	boolean
`salePercentage`	int
`saleStart` / `saleEnd`	Date
`approved`	boolean
`isFeatured`	boolean
`isHidden`	boolean
`gigActive`	boolean	OpenSearch indexed flag
`duration`	int
`durationMeasure`	enum	MINUTES/HOURS/DAYS/WEEKS/MONTHS/YEARS
`instructor`	Relation→Instructor	Eager
`managers`	Relation→CourseManager[]	OneToMany
`sections`	Relation→CourseSection[]	OneToMany, cascade
`requirements`	Relation→Requirement[]	OneToMany, cascade
`inclusions`	Relation→Inclusion[]	OneToMany, cascade
`audiences`	Relation→Audience[]	OneToMany, cascade
`welcomeMessage`	string
`completionMessage`	string
`shareUrl`	string
`publishedAt`	Date
`approvedAt`	Date
`timing`	string
`lessonNote`	string

CourseSection (entities/sections.entity.ts) — Table: course_sections

Field	Type
`id`	UUID PK
`title`	string
`description`	string
`priceInCents`	int (for à-la-carte)
`saleActive` / `salePercentage`
`isActive`	boolean
`order`	int
`course`	Relation→Course
`subsections`	Relation→CourseSubSection[]

CourseSubSection (entities/subsections.entity.ts) — Table: course_subsections

Field	Type
`id`	UUID PK
`title`	string
`description`	string
`isActive`	boolean
`order`	int
`section`	Relation→CourseSection
`items`	Relation→CourseItem[]

CourseItem (entities/course_item.entity.ts) — Table: course_items

Field	Type
`id`	UUID PK
`title`	string
`type`	enum: VIDEO / FILE / CAPTION / LECTURE_NOTE / TEXT / DESCRIPTION / ASSIGNMENT / QUIZ
`size`	int (for files/video)
`duration`	int (minutes for video)
`content`	text (HTML for text-based types)
`fileUrl`	string
`bunnyVideoId`	string
`bunnyVideoStatus`	string
`isActive`	boolean
`order`	int
`subSection`	Relation→CourseSubSection

Level (entities/level.entity.ts) — Table: levels — id, text

CourseManager (entities/manager.entity.ts) — Junction: course ↔ instructor

1.5 Enums

Enum	File	Values
`PublishStatus`	`enums/publish-status.enum.ts`	DRAFT, PUBLISHED, ARCHIVED
`CourseItemType`	`enums/course-item.enum.ts`	VIDEO, FILE, CAPTION, LECTURE_NOTE, TEXT, DESCRIPTION, ASSIGNMENT, QUIZ
`ItemCompletionStatus`	`enums/item-status.enum.ts`	NOT_STARTED, IN_PROGRESS, NOT_AVAILABLE, COMPLETED
`DurationMeasure`	`enums/duration-measure.enum.ts`	MINUTES, HOURS, DAYS, WEEKS, MONTHS, YEARS

1.6 CASL Permissions

File: course.permissions.ts

Role	Permission
`everyone`	Read published courses
`admin`	Manage all courses
`support`	Read/update courses
`instructor`	Own courses only (by instructor ID)

Hooks: CourseHook loads course entity for permission checks. CourseSectionHook loads section's parent course.

1.7 WebSocket Gateway

File: course-progress.gateway.ts — Namespace course-progress

Events: heartbeat, time_update, mark_completed, get_last_watched. 5s debounce on writes. Syncs video position to UserVideoProgress.

1.8 Background Jobs

File: jobs/certificate-generation.job.ts — BullMQ job for completion certificates.

2. Server: Enrollment Module

Module: server/src/enrollment/enrollment.module.ts — Route /enrollment

2.1 Endpoints

Method	Endpoint	Description
`GET`	`/enrollment/me`	Current user's enrollments
`GET`	`/enrollment/check/:productType/:productId`	Check enrollment status
`GET`	`/enrollment/:id`	Single enrollment
`GET`	`/enrollment/:id/completion`	Completion check
`GET`	`/enrollment`	Admin: all enrollments

Enrollment Entity (entities/enrollment.entity.ts) — Table: enrollments

Field	Type
`id`	UUID PK
`type`	ProductItemType (COURSE / CONSULTATION)
`student`	Relation→Student
`course`	Relation→Course
`status`	EnrollmentStatus
`payment`	Relation→Payment
`order`	Relation→Order
`sectionEnrollments`	Relation→SectionEnrollment[]
`enrolledAt`	Date
`accessEndDate`	Date

EnrollmentStatus enum: PENDING, APPROVED, COMPLETED, REJECTED, REFUNDED

2.2 Enrollment Flow

Payment success event
  → EnrollmentListener listens for AppEvents.PAYMENT_SUCCESSFUL
  → enrollmentService.createEnrollment()
    → Creates Enrollment record
    → Creates SectionEnrollment records
    → Emits AppEvents.ENROLLMENT_CREATED
      → InstantListener creates chat room participant
      → NotificationListener sends product enrollment notification

3. Server: Cross-Cutting

3.1 OpenSearch Integration

Files: server/src/opensearch/

File	Role
`course-elastic.service.ts`	Index: upsert, delete, search, update `gigActive`
`types/opensearch-course.type.ts`	Indexed document shape
`properties/course.property.ts`	ES property mappings
`listeners/course.listener.ts`	Listens `COURSE_UPDATED`, `COURSE_REMOVED`, `PRODUCT_ACTION_NEEDED` → syncs to ES

Courses are indexed with gigActive flag. Search queries filter gigActive: true.

3.2 Marketplace (Public Course Search)

Route: /marketplace/course (separate controller)

Used by public/ for course discovery. Wraps OpenSearch queries.

3.3 Analytics

File: server/src/analytics/entities/course-analytics-daily.entity.ts

Daily aggregations: enrollments, revenue, views, completions per course.

3.4 Video Infrastructure

Bunny Stream for video hosting
TUS resumable upload protocol via initVideoUpload → returns upload URL + signature
refreshVideoUpload for expiring signatures
getVideoPlayback returns playback URL, thumbnail, available resolutions

4. Student Frontend

4.1 Service Layer

File: student/src/services/course.service.ts

Static HTTP client class. Defines local Course, Section, Subsection, Item, Level, Category, Instructor, etc. interfaces.

Method	API Call
`getCourseById(id, view)`	`GET /course/:id?view=`
`getCourseBySlug(slug, view)`	`GET /course/slug/:slug?view=`
`getAllSectionsForCourse(courseId, view)`	`GET /course/section?courseId=&view=`
`getSectionById(id)`	`GET /course/section/:id`
`getAllSubsectionsForSection(sectionId)`	`GET /course/subsection?sectionId=`
`getSubsectionById(id)`	`GET /course/subsection/:id`
`getAllItemsForSubsection(subsectionId)`	`GET /course/item?subsectionId=`
`getItemById(id)`	`GET /course/item/:id`
`getItemVideoPlayback(id)`	`GET /course/item/:id/video`
`downloadCourseItemFile(courseItemId)`	`GET /course/download/:courseItemId`
`getAllLevels()`	`GET /course/levels`

4.2 Player Service

File: student/src/services/course-player.service.ts

Method	API Call
`getCourseForPlayer(courseId)`	`GET /course/:id/player`

Returns StudentCoursePlayerDto with section locking, progress, pre-signed video URLs.

4.3 Progress Service

File: student/src/services/course-progress.service.ts

Method	API Call
`getCourseProgress(courseId)`	`GET /course/progress/:courseId`
`updateCourseProgress(courseId, data)`	`PATCH /course/progress/:courseId`
`getLastWatchedPosition(courseId)`	`GET /course/progress/:courseId/last-watched`

4.4 React Query Hooks

Hook	File	Key
`useCourse(courseId)`	`hooks/useCourse.ts`	`["course", courseId]`
`useCoursePlayer(courseId)`	`hooks/useCoursePlayer.ts`	`["coursePlayer", courseId]`
`useCourseProgress(courseId)`	`hooks/useCourseProgress.ts`	`["courseProgress", courseId]` — includes optimistic updates + utility methods
`useEnrollments(type?)`	`hooks/useEnrollments.ts`	`["enrollments", type]`

useCourseProgress returns:

progress, isLoading, error
updateProgress, updateSection, updateSubsection, updateItem
setCurrentPosition, getItemProgress, markItemCompleted, updateVideoTime
getSectionProgress, getSubsectionProgress

Optimistic update pattern: onMutate snapshots + onError rollback + onSettled invalidation.

4.5 Zustand Store

File: student/src/stores/my-course.ts

Persisted store (my-course-store key) for current player position: sectionId, subsectionId, itemId, videoCurrentTime.

4.6 Progress Types

File: student/src/types/course-progress.d.ts

CourseProgress {
    currentSectionId, currentSubsectionId, currentItemId,
    currentVideoSeekTime, completionPercentage,
    sections: [{ id, progressPercentage, completed,
        subsections: [{ id, completed,
            items: [{ id, completed, seekTime, lastAccessed }]
        }]
    }]
}

4.7 Pages

Route	Component	Path
`/my-courses`	`MyCourses.tsx`	`pages/my-courses/MyCourses.tsx`
`/my-courses/ongoing`	`OnGoingCourse.tsx`	`pages/my-courses/OnGoingCourse.tsx`
`/my-courses/completed`	`Completed.tsx`	`pages/my-courses/Completed.tsx`
`/my-courses/:id`	`MyCourseDetails.tsx`	`pages/my-courses/[id]/MyCourseDetails.tsx`
`—/description`	`Description.tsx`	`pages/my-courses/[id]/Description.tsx`
`—/attached`	`Attached.tsx`	`pages/my-courses/[id]/Attached.tsx`
`—/lesson-note`	`LessonNote.tsx`	`pages/my-courses/[id]/LessonNote.tsx`
`—/comments`	`Comments.tsx`	`pages/my-courses/[id]/Comments/`

4.8 Player Components

Component	Path
`Section`	`components/Curriculum/Section/index.tsx`
`Lecture`	`components/Curriculum/Section/Lecture.tsx`
`SubSection`	`components/Curriculum/Section/SubSection.tsx`
`CourseContent`	`components/course-slider/CourseContent.jsx`

5. Instructor Frontend

5.1 Service Layer

File: instructor/src/services/course.service.ts

Full CRUD for course management. Defines local CourseResponseDto, CreateCourseDto, UpdateCourseDto, CourseSummaryDto, CourseManagerDto.

Method	API Call
`createCourse(data)`	`POST /course`
`getAllCourses(query)`	`GET /course?view=dashboard&...` — paginated with filters
`getCourseById(id)`	`GET /course/:id?view=dashboard`
`getCourseBySlug(slug)`	`GET /course/slug/:slug?view=dashboard`
`getNormalizedCurriculum(id)`	`GET /course/:id/curriculum?view=dashboard` — Zod validated
`updateCourse(id, data)`	`PUT /course/:id`
`deleteCourse(id)`	`DELETE /course/:id`
`batchUpdateSections(courseId, data)`	`PATCH /course/batch/:courseId/sections`
`batchUpdateSubsections(sectionId, data)`	`PATCH /course/batch/:sectionId/subsections`
`batchUpdateItems(subsectionId, data)`	`PATCH /course/batch/:subsectionId/items`
`getAllLevels()`	`GET /course/levels?view=dashboard`
`getCourseSummaries(instructorId)`	`GET /course/summaries/:instructorId?view=dashboard`
Property CRUD	`GET/POST/PUT/DELETE /course/:id/:type`
`replaceAllProperties(courseId, type, data)`	`PUT /course/:courseId/:type/replace`
Course Manager CRUD	`GET/POST/PUT/DELETE /course-managers`

Additional services:

instructor/src/services/course-item.service.ts — Item CRUD
instructor/src/services/course-section.service.ts — Section CRUD
instructor/src/services/course-subsection.service.ts — Subsection CRUD

5.2 Course Editor

Multi-step form with Zustand store slices:

Slice	File
State definition	`stores/course-editor/state.ts`
Types	`stores/course-editor/types.ts`
Curriculum	`stores/course-editor/curriculum.slice.ts` — sections/subsections/items
Form	`stores/course-editor/form.slice.ts`
Step wizard	`stores/course-editor/step.slice.ts`
Navigation	`stores/course-editor/navigation.slice.ts`
Sync	`stores/course-editor/sync.slice.ts`
Step handler registry	`stores/course-editor/step-handler-registry.ts`

Editor pages:

Step	Component	Path
Basic Info	`BasicInformation.tsx`	`pages/editor/BasicInformation.tsx`
Advanced Info	`AdvanceInformation.tsx`	`pages/editor/AdvanceInformation.tsx`
Curriculum	`Curriculum.tsx`	`pages/editor/Curriculum.tsx`
Pricing	`Pricing.tsx`	`pages/editor/Pricing.tsx`
Publish	`PublishCourse.tsx`	`pages/editor/PublishCourse.tsx`

Editor components:

Component	Path	Role
`CurriculumSection`	`components/course/CurriculumSection.tsx`	Drag-and-drop section
`CurriculumSubsection`	`components/course/CurriculumSubsection.tsx`	Drag-and-drop subsection
`CourseItem`	`components/course/CourseItem.tsx`	Item type selector/editor
`CourseImage`	`components/course/CourseImage.tsx`	Thumbnail upload
`SubsectionContent`	`components/course/SubsectionContent.tsx`	Content editor
`SubmitButton`	`components/course/SubmitButton.tsx`	Publish/submit
`bunny-video`	`components/course/bunny-video.ts`	Bunny Stream integration
`sortable`	`components/course/sortable.tsx`	DnD wrapper

5.3 Dashboard Pages

Page	File
Course list	`pages/course/CoursesMain.tsx`
Course detail/edit	`pages/course/CourseDetailsPage.tsx`
Activity dashboard	`components/course/CourseActivityDashboard.tsx`
Activity summary	`components/course/CourseActivitySummary.tsx`

5.4 Zod Validation

File: instructor/src/utils/schema/course.schema.ts — normalizedCurriculumSchema

6. Admin Frontend

6.1 Service Layer

File: admin/src/services/course.service.ts

Method	API Call
`getAllCourses(params)`	`GET /course` — paginated
`getAdminCourses(params)`	`GET /course` with data normalization
`getAdminCourse(id)`	`GET /course/:id?view=admin`
`deleteCourse(id)`	`DELETE /course/:id`
`updateVisibility(id, update)`	`PUT /course/:id/visibility`
`getCourseCurriculum(id)`	`GET /course/:id/curriculum`
`deleteSection(sectionId)`	`DELETE /course/section/:sectionId`
`deleteCourseItem(itemId)`	`DELETE /course/item/:itemId`
`getCourseAnalytics(id)`	`GET /analytics/course/:id`
`getCourseReviews(courseId)`	`GET /review/all?id=&type=course`
`deleteReview(reviewId)`	`DELETE /review/:reviewId`

6.2 Admin Course Types

File: admin/src/types/course.types.ts

Defines AdminCourse (280+ lines), CourseListParams, CurriculumData, CourseFilters, CourseStatistics, CourseDetailAnalytics, CourseReview, PublishStatus enum, DurationMeasure enum, VisibilityUpdate.

6.3 Zod Schemas

File: admin/src/schemas/course.schema.ts

courseFiltersSchema, visibilityUpdateSchema, courseRejectionSchema, courseApprovalSchema.

6.4 Data Provider Handler

File: admin/src/providers/data-provider/handlers/courses.handler.ts

Integrates with Refine/React Admin for list, show, delete operations.

6.5 Pages & Components

Page/Component	Path
Course list	`pages/courses/list.tsx`
Course detail	`pages/courses/show.tsx` with tabs
CourseCard	`pages/courses/CourseCard.tsx`
FilterBar	`pages/courses/components/FilterBar.tsx`
BulkActionsBar	`pages/courses/components/CourseBulkActionsBar.tsx`
StatsGrid	`pages/courses/components/CourseStatsGrid.tsx`
OverviewTab	`pages/courses/components/OverviewTab/`
CurriculumTab	`pages/courses/components/CurriculumTab/`
AnalyticsTab	`pages/courses/components/AnalyticsTab/`
ReviewsTab	`pages/courses/components/ReviewsTab/`
AdminTab	`pages/courses/components/AdminTab/` — approve/reject
CourseHeader	`pages/courses/components/CourseHeader/`
SharedComponents	`pages/courses/components/SharedComponents.tsx`
DeleteCourseDialog	`pages/courses/components/Modals/DeleteCourseDialog.tsx`

7. Public/Marketplace Frontend

7.1 Service Layer

File: public/src/services/course.service.ts

Method	API Call	View
`getCourseById(id)`	`GET /course/:id`	PUBLIC
`getCourseBySlug(slug)`	`GET /course/slug/:slug`	PUBLIC
`getAllSectionsForCourse(courseId)`	`GET /course/section?courseId=`	default
`getSectionById(id)`	`GET /course/section/:id`
`getAllSubsectionsForSection(sectionId)`	`GET /course/subsection?sectionId=`
`getSubsectionById(id)`	`GET /course/subsection/:id`
`getAllItemsForSubsection(subsectionId)`	`GET /course/item?subsectionId=`
`getItemById(id)`	`GET /course/item/:id`
`getAllLevels()`	`GET /course/levels`
`getCoursesByInstructor(instructorId, limit)`	`GET /course?instructorId=`
`searchMarketplaceCourses(params)`	`GET /marketplace/course`

7.2 Hooks

Hook	File
`useCoursePage()`	`hooks/useCoursePage.ts` — slug → course, enrollment check, section selection
`useCoursesPage()`	`hooks/useCoursesPage.ts` — categories, best-selling, top-rated, most-popular, new-arrival
`useCourseSearch()`	`hooks/useCourseSearch.ts`
`useSimilarCourses()`	`hooks/useSimilarCourses.ts`
`useInstructorAvailableCourses()`	`hooks/useInstructorAvailableCourses.ts`

7.3 Store

File: public/src/stores/course.ts

Zustand store: currentTab, selectedSections for à-la-carte purchasing with section selection/deselection and price calculation.

8. SDK (Auto-generated)

Files: sdk/src/

File	Content
`axios/course/course.ts`	50+ API client functions (orval-generated)
`axios/course-managers/course-managers.ts`	Course manager API client
`hooks/course/course.ts`	React Query hooks (useQuery + useMutation)
`hooks/course-managers/course-managers.ts`	Course manager query hooks

9. Data Flow Diagrams

Course Creation (Instructor)

Instructor Editor
  → CourseEditor.tsx (multi-step wizard)
  → instructor/src/services/course.service.ts
    → POST /course (create)
    → POST /course/:id/section (add sections)
    → POST /course/section/:sectionId/subsection (add subsections)
    → POST /course/item (add items)
    → POST /course/item/:id/video/upload (upload video via Bunny TUS)
  → Server: CourseWriteService.create
    → Course entity saved
    → Event emitted: COURSE_CREATED
  → OpenSearch listener indexes course

Course Player (Student)

Student opens /my-courses/:id
  → MyCourseDetails.tsx
  → useCoursePlayer(courseId)
    → GET /course/:id/player
      → CoursePlayerService.getCourseForPlayer()
        → Validates enrollment
        → Loads course + sections + subsections + items
        → Computes section locking (previous section must be completed)
        → Generates pre-signed video URLs
        → Returns StudentCoursePlayerDto with progress
  → useCourseProgress(courseId)
    → GET /course/progress/:courseId
    → Tracks: currentSection, currentItem, videoTime, completion
    → Optimistic updates via React Query mutation
    → WebSocket: course-progress gateway for real-time heartbeat
    → PATCH /course/progress/:courseId on debounce

Course Approval (Admin)

Admin opens course detail
  → GET /course/:id?view=admin
  → AdminTab: Approve / Reject
  → PUT /course/:id (sets approved=true + publishStatus=PUBLISHED)
  → AppEvents.COURSE_APPROVED emitted
    → NotificationListener → email to instructor
    → InstantListener → creates GROUP chat room
    → Course added to OpenSearch (gigActive = true)
  → Marketplace now shows course

Enrollment (Student Purchase)

Student purchases course
  → Payment successful → AppEvents.PAYMENT_SUCCESSFUL
  → EnrollmentListener → enrollmentService.createEnrollment()
    → Creates Enrollment + SectionEnrollment records
    → Emits AppEvents.ENROLLMENT_CREATED
      → InstantListener: adds student as chat room participant
      → NotificationListener: sends enrollment confirmation
    → Student can now access /course/:id/player

Course Search (Marketplace)

User searches on landing/public
  → public/src/hooks/useCoursesPage.ts
  → GET /marketplace/course (OpenSearch-backed)
    → Filters: category, level, price, rating, search term
    → Returns paginated results with totalHits
  → Course card → GET /course/slug/:slug
    → Checks enrollment (GET /enrollment/check/course/:id)
    → Shows enroll/buy CTA

10. File Index by Package

Server: Course Module (~58 files)

Category	Count	Key Paths
Module	1	`course.module.ts`
Controllers	4	`course.controller.ts`, `course-manager.controller.ts`, `progress.controller.ts`, `batch-update.controller.ts`
Services	10	`services/course-read.service.ts`, `services/course-write.service.ts`, `services/course-moderation.service.ts`, `services/course-player.service.ts`, `services/course-response.service.ts`, `course-section.service.ts`, `course-subsection.service.ts`, `course-item.service.ts`, `course-manager.service.ts`, `progress.service.ts`
Entities	12	`entities/course.entity.ts`, `entities/sections.entity.ts`, `entities/subsections.entity.ts`, `entities/course_item.entity.ts`, `entities/level.entity.ts`, `entities/manager.entity.ts`, `entities/progress.entity.ts`, `entities/user-video-progress.entity.ts`, `entities/user-video-session.entity.ts`, `entities/requirement.entity.ts`, `entities/audience.entity.ts`, `entities/benefit.entity.ts`
Enums	4	`enums/publish-status.enum.ts`, `enums/course-item.enum.ts`, `enums/item-status.enum.ts`, `enums/duration-measure.enum.ts`
DTOs	26	`dto/` — create, update, response, player, video, batch, manager, progress, curriculum
Hooks/Perms	4	`course.hook.ts`, `course-section.hook.ts`, `course.permissions.ts`
Gateway	1	`course-progress.gateway.ts`
Jobs	1	`jobs/certificate-generation.job.ts`
Seeds	1	`seeds/level.seeder.ts`

Server: Enrollment Module (~16 files)

enrollment.module.ts, enrollment.controller.ts, enrollment.service.ts, entities/enrollment.entity.ts, entities/section-enrollments.entity.ts, enums/enrollment-status.entity.ts, dto/ (7 files), listeners/enrollment.listener.ts, enrollment.permissions.ts, enrollment.hook.ts

Server: Cross-Cutting

elastic/course-elastic.service.ts, elastic/types/opensearch-course.type.ts, elastic/properties/course.property.ts, elastic/listeners/course.listener.ts, analytics/entities/course-analytics-daily.entity.ts, faker/flows/course.flow.ts, validation/schemas/course.schema.ts, templates/emails/course.tsx

Student Frontend (~18 files)

Category	Key Paths
Services	`services/course.service.ts`, `services/course-player.service.ts`, `services/course-progress.service.ts`
Hooks	`hooks/useCourse.ts`, `hooks/useCoursePlayer.ts`, `hooks/useCourseProgress.ts`, `hooks/useEnrollments.ts`
Store	`stores/my-course.ts`
Types	`types/course-progress.d.ts`
Pages	`pages/my-courses/MyCourses.tsx`, `pages/my-courses/OnGoingCourse.tsx`, `pages/my-courses/Completed.tsx`, `pages/my-courses/[id]/MyCourseDetails.tsx`, `pages/my-courses/[id]/Description.tsx`, `pages/my-courses/[id]/Attached.tsx`, `pages/my-courses/[id]/LessonNote.tsx`, `pages/my-courses/[id]/Comments/`
Components	`components/Curriculum/Section/`, `components/course-slider/CourseContent.jsx`
Layout	`layout/CoursePageLayout.jsx`

Instructor Frontend (~30 files)

Category	Key Paths
Services	`services/course.service.ts`, `services/course-item.service.ts`, `services/course-section.service.ts`, `services/course-subsection.service.ts`
Store	`stores/course-editor/` (9 slices)
Pages	`pages/course/CoursesMain.tsx`, `pages/course/CourseDetailsPage.tsx`, `pages/editor/` (6 files)
Components	`components/course/` (10 files)

Admin Frontend (~18 files)

Category	Key Paths
Service	`services/course.service.ts`
Types	`types/course.types.ts`
Schemas	`schemas/course.schema.ts`
Handler	`providers/data-provider/handlers/courses.handler.ts`
Pages	`pages/courses/list.tsx`, `pages/courses/show.tsx`
Tab Components	`components/` — OverviewTab, CurriculumTab, AnalyticsTab, ReviewsTab, AdminTab

Public Marketplace (~7 files)

Category	Key Paths
Service	`services/course.service.ts`
Hooks	`hooks/useCoursePage.ts`, `hooks/useCoursesPage.ts`, `hooks/useCourseSearch.ts`, `hooks/useSimilarCourses.ts`, `hooks/useInstructorAvailableCourses.ts`
Store	`stores/course.ts`

SDK (~4 files)

axios/course/course.ts, axios/course-managers/course-managers.ts, hooks/course/course.ts, hooks/course-managers/course-managers.ts

Landing Page (~3 files)

components/cards/courses_card/CoursesCard.jsx, pages/home/courseSearch/CourseSearch.jsx

Architecture Overview​

1. Server: Course Module​

1.1 Hierarchy​

1.2 Controllers​

1.3 Services​

1.4 Entities​

1.5 Enums​

1.6 CASL Permissions​

1.7 WebSocket Gateway​

1.8 Background Jobs​

2. Server: Enrollment Module​

2.1 Endpoints​

2.2 Enrollment Flow​

3. Server: Cross-Cutting​

3.1 OpenSearch Integration​

3.2 Marketplace (Public Course Search)​

3.3 Analytics​

3.4 Video Infrastructure​

4. Student Frontend​

4.1 Service Layer​

4.2 Player Service​

4.3 Progress Service​

4.4 React Query Hooks​

4.5 Zustand Store​

4.6 Progress Types​

4.7 Pages​

4.8 Player Components​

5. Instructor Frontend​

5.1 Service Layer​

5.2 Course Editor​

5.3 Dashboard Pages​

5.4 Zod Validation​

6. Admin Frontend​

6.1 Service Layer​

6.2 Admin Course Types​

6.3 Zod Schemas​

6.4 Data Provider Handler​

6.5 Pages & Components​

7. Public/Marketplace Frontend​

7.1 Service Layer​

7.2 Hooks​

7.3 Store​

8. SDK (Auto-generated)​

9. Data Flow Diagrams​

Course Creation (Instructor)​

Course Player (Student)​

Course Approval (Admin)​

Enrollment (Student Purchase)​

Course Search (Marketplace)​

10. File Index by Package​

Server: Course Module (~58 files)​

Server: Enrollment Module (~16 files)​

Server: Cross-Cutting​

Student Frontend (~18 files)​

Instructor Frontend (~30 files)​

Admin Frontend (~18 files)​

Public Marketplace (~7 files)​

SDK (~4 files)​

Landing Page (~3 files)​