# Technical Architecture Report (Current State)

Date: 2026-07-31  
Scope: Current implementation only (no redesign suggestions)

---

## 1. Database

Authoritative schema source: [prisma/schema.prisma](prisma/schema.prisma)

### Full Prisma Schema
The full schema is defined in [prisma/schema.prisma](prisma/schema.prisma).

### Models related to requested domains

- Users/Auth
  - User
  - Account
  - Session
  - VerificationToken
  - ClientAccess
- Projects/Episodes
  - Project
  - EpisodeDueDate
  - Client
- Shots/Tasks/Versions/Reviews
  - Shot
  - ShotGroup
  - Task
  - Version
  - Comment
  - CommentReply
  - Annotation
  - Approval
  - ReviewSession
- Files/Storage
  - FootagePlate
  - ShotReference
  - SystemConfig
- Delivery/Export adjacent
  - Shot fields: highResKey, highResFilename, exrOutput, shotVersion
  - Version fields: fileUrl, fileName, proxyUrl, thumbnailUrl, posterUrl

### Relationship summary

- Client 1:N Project
- Project 1:N Shot
- Project 1:N Task
- Project 1:N ReviewSession
- Project 1:N EpisodeDueDate
- Shot 1:N Task
- Shot 1:N Version
- Shot 1:N FootagePlate
- Shot 1:N ShotReference
- Task 1:N Version
- Version 1:N Comment
- Version 1:N Annotation
- Version 1:N Approval
- Comment 1:N CommentReply
- User has many assigned/created entities across shots, tasks, versions, comments, approvals

### Existing status enums

From [prisma/schema.prisma](prisma/schema.prisma):

- ProjectStatus: ACTIVE, ON_HOLD, COMPLETED, ARCHIVED
- ShotStatus: WAITING, IN_PROGRESS, INTERNAL_REVIEW, READY_FOR_CLIENT, CLIENT_REVIEW, REVISIONS, COMPLETE
- ShotApprovalStatus: PENDING, INTERNALLY_APPROVED, CLIENT_APPROVED
- TaskStatus: TODO, IN_PROGRESS, INTERNAL_REVIEW, CLIENT_REVIEW, CHANGES, DONE
- ApprovalStatus: PENDING_REVIEW, APPROVED, REJECTED, NEEDS_CHANGES
- ReviewStatus: PENDING, INTERNAL_APPROVED, CLIENT_APPROVED, NEEDS_CHANGES, FINAL_APPROVED

Notes:
- There is no dedicated Delivery model.
- There is no dedicated Export model.
- Delivery/export state is represented by file pointers and shot/version metadata fields.

---

## 2. API

### 2.1 Shots

#### External shot APIs

- GET /api/ext/projects
  - URL: /api/ext/projects
  - Method: GET
  - Purpose: List projects for pipeline tools
  - Request body: None
  - Response: projects[] with id, name, code, showId, projectType, status, dates, _count
  - Source: [app/api/ext/projects/route.ts](app/api/ext/projects/route.ts)

- GET /api/ext/projects/{projectCode}/episodes
  - URL: /api/ext/projects/{projectCode}/episodes
  - Method: GET
  - Purpose: List distinct episodes and optionally shot payloads per episode
  - Request body: None
  - Response: project + episodes[]; optional shots[] includes exrOutput/timecodes
  - Source: [app/api/ext/projects/[projectCode]/episodes/route.ts](app/api/ext/projects/%5BprojectCode%5D/episodes/route.ts)

- GET /api/ext/projects/{projectCode}/shots
  - URL: /api/ext/projects/{projectCode}/shots
  - Method: GET
  - Purpose: List shots by project code with filters/pagination
  - Request body: None
  - Response: project + pagination + shots[]
  - Source: [app/api/ext/projects/[projectCode]/shots/route.ts](app/api/ext/projects/%5BprojectCode%5D/shots/route.ts)

- GET /api/ext/shots
  - URL: /api/ext/shots
  - Method: GET
  - Purpose: Legacy listing by projectId
  - Request body: None
  - Response: shots[] + total
  - Source: [app/api/ext/shots/route.ts](app/api/ext/shots/route.ts)

- POST /api/ext/shots
  - URL: /api/ext/shots
  - Method: POST
  - Purpose: Create shot from external tool (JSON or multipart thumbnail)
  - Request body:
    - projectId, scene
    - optional episode, description, artistId, priority, fps, frameStart, frameEnd, dueDate, thumbnailUrl, shotGroupName, shotCode
    - optional thumbnail file (multipart)
  - Response: created shot object
  - Source: [app/api/ext/shots/route.ts](app/api/ext/shots/route.ts)

- GET /api/ext/shots/lookup
  - URL: /api/ext/shots/lookup
  - Method: GET
  - Purpose: Canonical shot lookup by shotCode (+ optional projectCode)
  - Request body: None
  - Response: shot object with project, artist, tasks, latest version, exrOutput, shotVersion, source/seq timecodes
  - Source: [app/api/ext/shots/lookup/route.ts](app/api/ext/shots/lookup/route.ts)

- GET /api/ext/shots/{shotId}
  - URL: /api/ext/shots/{shotId}
  - Method: GET
  - Purpose: Shot detail by DB id, or byCode mode
  - Request body: None
  - Response: full shot detail with tasks/latest version/counts
  - Source: [app/api/ext/shots/[shotId]/route.ts](app/api/ext/shots/%5BshotId%5D/route.ts)

- PATCH /api/ext/shots/{shotId}
  - URL: /api/ext/shots/{shotId}
  - Method: PATCH
  - Purpose: Update mutable shot field(s) from pipeline tools
  - Request body: shotVersion (v###) currently supported
  - Response: success + updated shot id/shotVersion
  - Source: [app/api/ext/shots/[shotId]/route.ts](app/api/ext/shots/%5BshotId%5D/route.ts)

#### Internal shot APIs

- GET /api/shots/{shotId}
  - URL: /api/shots/{shotId}
  - Method: GET
  - Purpose: Internal dashboard shot detail payload
  - Request body: None
  - Response: shot + tasks + artists + permissions flags
  - Source: [app/api/shots/[shotId]/route.ts](app/api/shots/%5BshotId%5D/route.ts)

- GET /api/projects/{projectId}/episodes
  - URL: /api/projects/{projectId}/episodes
  - Method: GET
  - Purpose: Internal distinct episode list for project
  - Request body: None
  - Response: episodes[]
  - Source: [app/api/projects/[projectId]/episodes/route.ts](app/api/projects/%5BprojectId%5D/episodes/route.ts)

### 2.2 Reviews

- GET /api/review-sessions
  - Purpose: list review sessions
- POST /api/review-sessions
  - Purpose: create review session token and portal link
- DELETE /api/review-sessions
  - Purpose: deactivate review session
- Source: [app/api/review-sessions/route.ts](app/api/review-sessions/route.ts)

- POST /api/client/{token}/auth
  - Purpose: review password check + unlock cookie
  - Source: [app/api/client/[token]/auth/route.ts](app/api/client/%5Btoken%5D/auth/route.ts)

- GET /api/client/{token}/project
  - Purpose: client portal project payload (shared shots/versions)
  - Source: [app/api/client/[token]/project/route.ts](app/api/client/%5Btoken%5D/project/route.ts)

- GET /api/client/{token}/versions/{versionId}
  - Purpose: client review detail payload
  - Source: [app/api/client/[token]/versions/[versionId]/route.ts](app/api/client/%5Btoken%5D/versions/%5BversionId%5D/route.ts)

- POST /api/client/{token}/comment
  - Purpose: client frame comment
  - Request body: versionId, frameNumber, timestamp, text
  - Response: created comment
  - Source: [app/api/client/[token]/comment/route.ts](app/api/client/%5Btoken%5D/comment/route.ts)

- POST /api/client/{token}/annotation
  - Purpose: client annotation write
  - Request body: versionId, frameNumber, drawingData, optional color
  - Response: annotation
  - Source: [app/api/client/[token]/annotation/route.ts](app/api/client/%5Btoken%5D/annotation/route.ts)

- POST /api/client/{token}/approve
  - Purpose: shot-level approve/changes and legacy version-level approval
  - Request body:
    - shot mode: shotId + action
    - version mode: versionId + status + notes
  - Response: success
  - Source: [app/api/client/[token]/approve/route.ts](app/api/client/%5Btoken%5D/approve/route.ts)

- GET /api/versions/{versionId}/comments
  - Purpose: internal comments read
  - Source: [app/api/versions/[versionId]/comments/route.ts](app/api/versions/%5BversionId%5D/comments/route.ts)

- GET /api/versions/{versionId}/annotations
  - Purpose: internal annotations read
  - Source: [app/api/versions/[versionId]/annotations/route.ts](app/api/versions/%5BversionId%5D/annotations/route.ts)

- GET /api/playlist
  - Purpose: latest version per shot playlist
  - Source: [app/api/playlist/route.ts](app/api/playlist/route.ts)

### 2.3 File uploads

- POST /api/upload
  - Purpose: authenticated upload to Hetzner via app server
  - Body: multipart file (+ type)
  - Response: url, key
  - Source: [app/api/upload/route.ts](app/api/upload/route.ts)

- POST /api/upload/local
  - Purpose: authenticated video upload path
  - Body: multipart file
  - Response: url, key
  - Source: [app/api/upload/local/route.ts](app/api/upload/local/route.ts)

- POST /api/upload/presign
  - Purpose: direct browser->object-storage upload URL
  - Body: fileName, contentType, optional folder
  - Response: presignedUrl, key, url
  - Source: [app/api/upload/presign/route.ts](app/api/upload/presign/route.ts)

- GET/POST /api/uploadthing
  - Purpose: UploadThing route handler passthrough (if configured)
  - Source: [app/api/uploadthing/route.ts](app/api/uploadthing/route.ts)

- POST /api/batch-upload/presign
  - Purpose: presign high-res upload key
  - Body: fileName
  - Response: presignedUrl, key
  - Source: [app/api/batch-upload/presign/route.ts](app/api/batch-upload/presign/route.ts)

- POST /api/batch-upload/preview
  - Purpose: classify upload actions before upload
  - Body: projectId, fileNames[]
  - Response: items[] with statuses (new-version, rename-and-upload, create-task, update-highres, etc)
  - Source: [app/api/batch-upload/preview/route.ts](app/api/batch-upload/preview/route.ts)

- POST /api/batch-upload/upload
  - Purpose: commit highres key or create version records
  - Body:
    - update-highres: action, shotId, projectId, key, fileName
    - version upload: action, shotId, projectId, file, task routing fields
  - Response: success + action result
  - Source: [app/api/batch-upload/upload/route.ts](app/api/batch-upload/upload/route.ts)

### 2.4 EXRs / Rendering / Delivery / Storage / Metadata

- GET /api/files/{...key}
  - Purpose: file serving, range requests, local/Hetzner routing
  - Source: [app/api/files/[...key]/route.ts](app/api/files/%5B...key%5D/route.ts)

- GET/POST /api/admin/migration
  - Purpose: local uploads migration status and per-key migration to Hetzner
  - Source: [app/api/admin/migration/route.ts](app/api/admin/migration/route.ts)

- POST/DELETE /api/storage-test
  - Purpose: upload test object / delete test object
  - Source: [app/api/storage-test/route.ts](app/api/storage-test/route.ts)

- POST/DELETE /api/shots/{shotId}/highres
  - Purpose: upload/remove high-res deliverable on shot
  - Source: [app/api/shots/[shotId]/highres/route.ts](app/api/shots/%5BshotId%5D/highres/route.ts)

- GET /api/shots/{shotId}/highres/download
  - Purpose: internal presigned download URL for high-res
  - Source: [app/api/shots/[shotId]/highres/download/route.ts](app/api/shots/%5BshotId%5D/highres/download/route.ts)

- GET /api/client/{token}/shots/{shotId}/highres/download
  - Purpose: client token-gated presigned high-res download URL
  - Source: [app/api/client/[token]/shots/[shotId]/highres/download/route.ts](app/api/client/%5Btoken%5D/shots/%5BshotId%5D/highres/download/route.ts)

- GET/POST/DELETE /api/shots/{shotId}/references
  - Purpose: shot reference image management
  - Source: [app/api/shots/[shotId]/references/route.ts](app/api/shots/%5BshotId%5D/references/route.ts)

- GET /api/storyboard/pdf
  - Purpose: server-rendered printable storyboard HTML with metadata options
  - Source: [app/api/storyboard/pdf/route.ts](app/api/storyboard/pdf/route.ts)

Notes:
- No dedicated REST endpoint that runs ffmpeg in this repository.
- No dedicated REST endpoint that performs EXR rendering on the server.
- No dedicated deliveries API namespace.

---

## 3. Storage

Primary storage abstraction: [lib/storage.ts](lib/storage.ts)

### Provider modes

- local
- uploadthing
- s3
- r2
- b2
- minio

### Dedicated high-res object storage path

- Hetzner object storage helper methods are used for high-res and presigned direct uploads.
- Config source precedence:
  - SystemConfig table keys
  - env fallback

### Folder/key layout in object storage (current code paths)

- videos/
- image/
- highres/
- storage-test/

### Local storage

- LOCAL_UPLOAD_DIR (default ./uploads)
- Served via /api/files catch-all route

### File naming conventions

- Key format: {folder}/{uuid}-{sanitized-file-name}
- Sanitization done by sanitizeFileName to avoid URL/signature problems in object keys

### EXR locations

Within web app/runtime:
- EXR references are naming metadata (Shot.exrOutput) and file-serving pathing.

Within DCC tooling docs/scripts:
- AE/Nuke workflows target shared export roots and per-shot folders.

### Preview locations

- Version media URLs stored in Version.fileUrl
- Accessed through app player routes and /api/files routing where applicable

### Thumbnail locations

- Shot.thumbnailUrl
- Version.thumbnailUrl
- Can point to /api/files/{key} or external provider URL

Relevant sources:
- [lib/storage.ts](lib/storage.ts)
- [app/api/files/[...key]/route.ts](app/api/files/%5B...key%5D/route.ts)
- [actions/settings.ts](actions/settings.ts)

---

## 4. Export Pipeline (Current)

### AE panel

Documented in repo:
- [VFXReviewConnector.md](VFXReviewConnector.md)
- [EXT_API_REFERENCE.md](EXT_API_REFERENCE.md)

Implemented panel script also exists on the host AE installation (outside workspace), and behavior aligns with docs:
- Episodes/shots discovery via ext APIs
- Shot lookup API usage for metadata
- Overlay/slate essential property updates (burn-in style overlays)
- Queue EXR / Queue MP4 / Queue MOV render queue actions
- Queue EXR (review convention)
- Import exported EXR and import renders
- Pull picture lock using seq timecodes
- Increment shot version by PATCH call
- Delivery prep that copies/renames EXR files to delivery folder convention

### External API endpoints used by DCC tools

- GET /api/ext/projects/{projectCode}/episodes
- GET /api/ext/projects/{projectCode}/shots
- GET /api/ext/shots/lookup
- PATCH /api/ext/shots/{shotId}

### Existing render scripts and pipelines

- AE panel render queue automation (external script)
- Nuke connector script creating write-node outputs and shot scripts:
  - [VFXReviewConnector.py](VFXReviewConnector.py)

### ffmpeg scripts

- None found in this repository.

### Proxy generation

- Version.proxyUrl field exists in schema.
- No implemented proxy-generation worker/function found.

### Thumbnail generation

- Upload/assignment flows exist.
- No server-side frame-extract thumbnail generator found.

### Metadata extraction

- EDL / picture-tracker CSV metadata parsing implemented:
  - [lib/edl-utils.ts](lib/edl-utils.ts)
  - [actions/shots.ts](actions/shots.ts)

### Burn-in generation

- Achieved via DCC overlay/slate layers and essential properties in AE/Nuke tool workflows.
- No ffmpeg burn-in path found.

---

## 5. Review System

### Current review workflow

Core status derivation:
- [lib/shot-status.ts](lib/shot-status.ts)

Server action orchestration:
- [actions/versions.ts](actions/versions.ts)
- [actions/approvals.ts](actions/approvals.ts)
- [actions/tasks.ts](actions/tasks.ts)
- [actions/shots.ts](actions/shots.ts)
- [actions/comments.ts](actions/comments.ts)

### Internal review

- Version upload:
  - marks previous versions non-latest
  - creates new latest version
  - moves Task to INTERNAL_REVIEW
  - recalculates Shot.status

### Client review

- Tokenized ReviewSession links
- Optional password gate with signed cookie unlock
- Client comment/annotation/approval endpoints
- Share/unshare semantics via shot and version visibility fields

### Task status flow

Observed statuses:
- TODO
- IN_PROGRESS
- INTERNAL_REVIEW
- CLIENT_REVIEW
- CHANGES
- DONE

### Shot status flow

Derived in priority order:
- REVISIONS (any task CHANGES)
- COMPLETE (shotApprovalStatus CLIENT_APPROVED)
- CLIENT_REVIEW / READY_FOR_CLIENT (internally approved + share flag)
- IN_PROGRESS (task TODO/IN_PROGRESS)
- INTERNAL_REVIEW (tasks exist)
- WAITING (no tasks)

### Approval process

- Version-level approvals create Approval rows and update Version.approvalStatus
- Shot-level client actions supported via client approve endpoint and shot actions

Reference doc in repo:
- [Shot task workflow.md](Shot%20task%20workflow.md)

---

## 6. Authentication

### External tools

- /api/ext/* routes authenticate using API_SECRET_KEY via:
  - Authorization: Bearer <key>
  - x-api-key header

### Client review links

- tokenized route with ReviewSession lookup
- optional password hash validation and signed unlock cookie

### App users

- NextAuth credentials provider
- bcrypt password hash compare
- JWT session strategy

### Middleware behavior

- Route classes allowed through middleware auth gate:
  - /api/ext/
  - /api/client/
  - /api/display/
  - /api/files/
  - /api/uploadthing
- Per-route auth still enforced in handlers

Sources:
- [auth.ts](auth.ts)
- [auth.config.ts](auth.config.ts)
- [middleware.ts](middleware.ts)
- [lib/review-auth.ts](lib/review-auth.ts)

---

## 7. Existing Background Jobs

### Cron jobs
- None found.

### Queues
- None found.

### Workers
- None found.

### Polling services
- Display devices poll:
  - /api/display/events
  - /api/dashboard/stats

### Docker containers
- vfxreview app container
- postgres container
- Source: [docker-compose.yml](docker-compose.yml)

### Scheduled tasks
- Startup migration commands in container entrypoint:
  - [entrypoint.sh](entrypoint.sh)
- AE panel Prep Delivery launches background PowerShell copy scripts on workstation (outside web app runtime)

---

## 8. After Effects Integration (Implemented Features)

Repo-level references:
- [VFXReviewConnector.md](VFXReviewConnector.md)
- [EXT_API_REFERENCE.md](EXT_API_REFERENCE.md)

Implemented capabilities observed/documented:

- API calls
  - episodes/shots listing and shot lookup
  - shot version PATCH
- Authentication
  - bearer API token in script
- Comp discovery
  - shot code extraction from comp names and dropdown selection
- Render queue integration
  - EXR Sequence
  - REVIEW_PREVIEW (MP4)
  - 4444 Tri (MOV)
  - EXR review sequence queue variant
- Output path generation
  - shot/version naming conventions + export root paths
- Shot lookup
  - uses /api/ext/shots/lookup for metadata and naming decisions
- Upload features
  - no direct upload-to-web API flow in panel docs/script (render/output handled in DCC/filesystem)
- Burn-in generation
  - overlay and slate essential properties
- Review integration
  - preview comp build and version increment sync

---

## 9. Configuration

### Environment variables

Primary reference: [.env.example](.env.example)

Observed vars in code/docs include:

- DATABASE_URL
- NEXTAUTH_SECRET
- NEXTAUTH_URL
- NEXT_PUBLIC_APP_URL
- NEXT_PUBLIC_APP_NAME
- API_SECRET_KEY
- AUTH_SECRET
- STORAGE_PROVIDER
- LOCAL_UPLOAD_DIR
- AWS_ACCESS_KEY_ID
- AWS_SECRET_ACCESS_KEY
- AWS_REGION
- AWS_BUCKET_NAME
- R2_ACCESS_KEY_ID
- R2_SECRET_ACCESS_KEY
- R2_ACCOUNT_ID
- R2_BUCKET_NAME
- R2_PUBLIC_URL
- B2_APPLICATION_KEY_ID
- B2_APPLICATION_KEY
- B2_BUCKET_NAME
- B2_ENDPOINT
- MINIO_ENDPOINT
- MINIO_ACCESS_KEY
- MINIO_SECRET_KEY
- MINIO_BUCKET_NAME
- HETZNER_ENDPOINT
- HETZNER_ACCESS_KEY
- HETZNER_SECRET_KEY
- HETZNER_BUCKET_NAME
- UPLOADTHING_SECRET
- UPLOADTHING_APP_ID
- EMAIL_FROM
- EMAIL_SERVER_HOST
- EMAIL_SERVER_PORT
- EMAIL_SERVER_USER
- EMAIL_SERVER_PASSWORD
- SLACK_DEFAULT_WEBHOOK

### Storage configuration

- Provider abstraction in [lib/storage.ts](lib/storage.ts)
- Hetzner overrides in [actions/settings.ts](actions/settings.ts) and SystemConfig table

### Render configuration

- No server-side renderer configuration module found.
- DCC render templates are documented in [VFXReviewConnector.md](VFXReviewConnector.md).

### ffmpeg configuration

- None found in repository.

### Object storage configuration

- Implemented for AWS S3/R2/B2/MinIO + dedicated Hetzner helper path

---

## 10. Existing Utility Functions (Reusable)

### Metadata extraction

- parseEdlCsv
- parsePictureTrackerCsv
- Source: [lib/edl-utils.ts](lib/edl-utils.ts)

### File scanning

- Local upload tree walker in migration route
- Nuke connector plate/render directory scanners
- Sources:
  - [app/api/admin/migration/route.ts](app/api/admin/migration/route.ts)
  - [VFXReviewConnector.py](VFXReviewConnector.py)

### EXR sequence detection

- Nuke connector helper sequence detectors and pattern conversion
- Source: [VFXReviewConnector.py](VFXReviewConnector.py)

### MOV generation

- No server-side MOV generation utility found.
- MOV outputs are DCC render queue outputs in external scripts/docs.

### Checksums

- No checksum utility found.

### Frame counting

- durationToFrameCount and frame math helpers
- Source: [lib/frame-utils.ts](lib/frame-utils.ts)

### Timecode extraction/conversion

- frameToTimecode / formatTimecode
- CSV timecode validation/parsing
- Sources:
  - [lib/frame-utils.ts](lib/frame-utils.ts)
  - [lib/utils.ts](lib/utils.ts)
  - [lib/edl-utils.ts](lib/edl-utils.ts)

---

## 11. High-Level Architecture Diagram

```mermaid
flowchart LR
  A[AE Panel / Nuke Connector\nExternal DCC tools] -->|API key auth| B[Next.js App Router APIs]
  B --> C[Prisma ORM]
  C --> D[(PostgreSQL)]

  B --> E[Storage Abstraction]
  E --> F[(Hetzner Object Storage)]
  E --> G[(S3/R2/B2/MinIO)]
  B --> H[(Local uploads dir)]

  I[Internal reviewers\nNextAuth session] --> B
  J[Client reviewers\nToken review sessions] --> B

  K[ESP32 display client] -->|x-display-key polling| B

  A --> L[Shared filesystem render roots\nEXR/MP4/MOV outputs]
  L -->|served/linked via app metadata| B
```

---

## 12. Files Inspected (Primary)

- [prisma/schema.prisma](prisma/schema.prisma)
- [lib/storage.ts](lib/storage.ts)
- [lib/shot-status.ts](lib/shot-status.ts)
- [lib/review-auth.ts](lib/review-auth.ts)
- [lib/edl-utils.ts](lib/edl-utils.ts)
- [lib/frame-utils.ts](lib/frame-utils.ts)
- [lib/utils.ts](lib/utils.ts)
- [auth.ts](auth.ts)
- [auth.config.ts](auth.config.ts)
- [middleware.ts](middleware.ts)
- [next.config.ts](next.config.ts)
- [.env.example](.env.example)
- [docker-compose.yml](docker-compose.yml)
- [Dockerfile](Dockerfile)
- [entrypoint.sh](entrypoint.sh)
- [EXT_API_REFERENCE.md](EXT_API_REFERENCE.md)
- [VFXReviewConnector.md](VFXReviewConnector.md)
- [VFXReviewConnector.py](VFXReviewConnector.py)
- [# VFXReview Connector for Nuke.md](#%20VFXReview%20Connector%20for%20Nuke.md)
- API handlers under [app/api](app/api)
- Server actions under [actions](actions)

---

End of current-state report.