โครงสร้างโฟลเดอร์และไฟล์ทั้งหมดสำหรับ Backend (NestJS) ตามแผนงาน LCBP3-DMS v1.4.3 ตั้งแต่ Phase 0 ถึง Phase 6 (T0-T6.2) ที่ได้ดำเนินการไปแล้ว

โครงสร้างนี้ออกแบบตามหลัก Domain-Driven Design และ Modular Architecture ที่ระบุไว้ในแผนพัฒนา

📂 backend/ (Backend Application)

.env (สำหรับ Local Dev เท่านั้น ห้าม commit)
.gitignore
docker-compose.yml (Configuration หลักสำหรับ Deploy)
docker-compose.override.yml (สำหรับ Inject Secrets ตอน Dev)
package.json
pnpm-lock.yaml
tsconfig.json
nest-cli.json
README.md

📂 backend/src/ (Source Code)

📄 Entry Points

main.ts (Application Bootstrap, Swagger, Global Pipes)
app.module.ts (Root Module ที่รวมทุก Modules เข้าด้วยกัน)

📁 src/common/ (Shared Resources)

common.module.ts
auth/
- dto/
  - login.dto.ts
  - register.dto.ts
- auth.controller.spec.ts
- auth.controller.ts
- auth.module.ts
- auth.service.spec.ts
- auth.service.ts
config/ (Configuration Service)
- env.validation.ts
decorators/
- audit.decorator.ts
- current-user.decorator.ts
- require-permission.decorator.ts
entities/
- audit-log.entity.ts
- base.entity.ts
exceptions/
- http-exception.filter.ts (Global Filter)
file-storage/ (Two-Phase Storage System)
- entities/
  - attachment.entity.ts
- file-storage.controller.spec.ts
- file-storage.controller.ts
- file-storage.module.ts
- file-storage.service.spec.ts
- file-storage.service.ts (Upload, Scan Virus, Commit)
guards/
- jwt-auth.guard.ts
- jwt.strategy.ts
- rbac.guard.ts (ตรวจสอบสิทธิ์ 4 ระดับ)
interceptors/
- audit-log.interceptor.ts (เก็บ Log ลง DB)
- transform.interceptor.ts (Standard Response Format)
resilience/ (Circuit Breaker & Retry)

📁 src/modules/ (Feature Modules)

user/ (User Management & RBAC)
- dto/
  - assign-user-role.dto.ts
  - create-user.dto.ts
  - update-user.dto.ts
- entities/
  - user.entity.ts
  - role.entity.ts
  - permission.entity.ts
  - user-preference.entity.ts
- user-assignment.service.ts
- user.controller.ts
- user.module.ts
- user.service.ts
- user.service.spec.ts
project/ (Project Structure)
- dto/
  - create-project.dto.ts
  - search-project.dto.ts
  - update-project.dto.ts
- entities/
  - contract-organization.entity.ts
  - contract.entity.ts
  - organization.entity.ts
  - project-organization.entity.ts (Junction)
  - project.entity.ts
- project.controller.spec.ts
- project.controller.ts
- project.module.ts
- project.service.spec.ts
- project.service.ts
correspondence/ (Core Document System)
- dto/
  - add-reference.dto.ts
  - create-correspondence.dto.ts
  - search-correspondence.dto.ts
  - submit-correspondence.dto.ts
  - workflow-action.dto.ts
- entities/
  - correspondence-reference.entity.ts
  - correspondence-revision.entity.ts
  - correspondence-routing.entity.ts (Unified Workflow)
  - correspondence-status.entity.ts
  - correspondence-type.entity.ts
  - correspondence.entity.ts
  - routing-template-step.entity.ts
  - routing-template.entity.ts
- correspondence.controller.spec.ts
- correspondence.controller.ts
- correspondence.module.ts
- correspondence.service.spec.ts
- correspondence.service.ts (Impersonation & Workflow Logic)
drawing/ (Contract & Shop Drawings)
- dto/
  - create-contract-drawing.dto.ts
  - create-shop-drawing-revision.dto.ts
  - create-shop-drawing.dto.ts
  - search-contract-drawing.dto.ts
  - search-shop-drawing.dto.ts
  - update-contract-drawing.dto.ts
- entities/
  - contract-drawing-sub-category.entity.ts
  - contract-drawing-volume.entity.ts
  - contract-drawing.entity.ts
  - shop-drawing-main-category.entity.ts
  - shop-drawing-revision.entity.ts
  - shop-drawing-sub-category.entity.ts
  - shop-drawing.entity.ts
- contract-drawing.controller.ts
- contract-drawing.service.ts
- drawing-master-data.controller.ts
- drawing-master-data.service.ts
- drawing.module.ts
- shop-drawing.controller.ts
- shop-drawing.service.ts
rfa/ (Request for Approval & Advanced Workflow)
- dto/
  - create-rfa.dto.ts
  - search-rfa.dto.ts
  - update-rfa.dto.ts
- entities/
  - rfa-approve-code.entity.ts
  - rfa-item.entity.ts
  - rfa-revision.entity.ts
  - rfa-status-code.entity.ts
  - rfa-type.entity.ts
  - rfa-workflow-template-step.entity.ts
  - rfa-workflow-template.entity.ts
  - rfa-workflow.entity.ts
  - rfa.entity.ts
- rfa.controller.ts
- rfa.module.ts
- rfa.service.ts (Unified Workflow Integration)
circulation/ (Internal Routing)
- dto/
  - create-circulation.dto.ts
  - update-circulation-routing.dto.ts
  - search-circulation.dto.ts
- entities/
  - circulation-routing.entity.ts
  - circulation-status-code.entity.ts
  - circulation.entity.ts
- circulation.controller.ts
- circulation.module.ts
- circulation.service.ts
transmittal/ (Document Forwarding)
- dto/
  - create-transmittal.dto.ts
  - search-transmittal.dto.ts
  - update-transmittal.dto.ts
- entities/
  - transmittal-item.entity.ts
  - transmittal.entity.ts
- transmittal.controller.ts
- transmittal.module.ts
- transmittal.service.ts
notification/ (System Alerts)
- dto/
  - create-notification.dto.ts
  - search-notification.dto.ts
- entities/
  - notification.entity.ts
- notification-cleanup.service.ts (Cron Job)
- notification.controller.ts
- notification.gateway.ts
- notification.module.ts (Real-time WebSocket)
- notification.processor.ts (Consumer/Worker for Email & Line)
- notification.service.ts (Producer)
search/ (Elasticsearch)
- dto/search-query.dto.ts
- search.controller.ts
- search.module.ts
- search.service.ts (Indexing & Searching)
document-numbering/ (Internal Service)
- entities/
  - document-number-format.entity.ts
  - document-number-counter.entity.ts
- document-numbering.module.ts
- document-numbering.service.spec.ts
- document-numbering.service.ts (Double-Lock Mechanism)
workflow-engine/ (Unified Logic)
- interfaces/workflow.interface.ts
- workflow-engine.module.ts
- workflow-engine.service.spec.ts
- workflow-engine.service.ts (State Machine Logic)
json-schema/ (Validation)
- dto/
  - create-json-schema.dto.ts+
  - search-json-schema.dto.ts
  - update-json-schema.dto.ts
- entities/
  - json-schema.entity.ts
- json-schema.controller.spec.ts
- json-schema.controller.ts
- json-schema.module.ts
- json-schema.service.spec.ts
- json-schema.service.ts

นี่คือโครงสร้าง Folder Structure ของโปรเจกต์ Backend (NestJS) ฉบับสมบูรณ์ ที่รวบรวมจาก Requirements, FullStackJS Guidelines, Data Dictionary และสิ่งที่เราได้ Implement ไปแล้วตั้งแต่ Phase 0 ถึง Phase 6.2 ครับ

โครงสร้างนี้เป็นแบบ Domain-Driven Modular Architecture ครับ

lcbp3-backend/
├── .env                        # Environment variables (Local Dev)
├── .gitignore
├── docker-compose.yml          # Main config for services (DB, Redis, ES, App)
├── docker-compose.override.yml # Secrets injection for Dev
├── nest-cli.json
├── package.json
├── pnpm-lock.yaml
├── README.md
├── tsconfig.json
│
└── src/
    ├── main.ts                 # Entry point (Swagger, Helmet, Global Pipes)
    ├── app.module.ts           # Root Module
    │
    ├── common/                 # 🛠️ Shared Resources
    │   ├── auth/
    │   │   ├── guards/
    │   │   │   ├── jwt-auth.guard.ts
    │   │   │   └── rbac.guard.ts
    │   │   └── strategies/
    │   │       └── jwt.strategy.ts
    │   ├── config/             # Config Service
    │   ├── decorators/
    │   │   ├── current-user.decorator.ts
    │   │   └── require-permission.decorator.ts
    │   ├── exceptions/
    │   │   └── http-exception.filter.ts
    │   ├── file-storage/       # 📂 Two-Phase Storage System
    │   │   ├── dto/
    │   │   ├── entities/
    │   │   │   └── attachment.entity.ts
    │   │   ├── file-storage.module.ts
    │   │   └── file-storage.service.ts
    │   ├── interceptors/
    │   │   ├── audit-log.interceptor.ts
    │   │   └── transform.interceptor.ts
    │   └── resilience/         # Circuit Breaker & Retry logic
    │
    └── modules/                # 📦 Feature Modules
        │
        ├── user/               # 👤 User & RBAC
        │   ├── dto/
        │   │   ├── create-user.dto.ts
        │   │   └── update-user.dto.ts
        │   ├── entities/
        │   │   ├── permission.entity.ts
        │   │   ├── role.entity.ts
        │   │   ├── user-preference.entity.ts
        │   │   └── user.entity.ts
        │   ├── user.controller.ts
        │   ├── user.module.ts
        │   └── user.service.ts
        │
        ├── project/            # 🏢 Projects & Organizations
        │   ├── dto/
        │   │   ├── create-project.dto.ts
        │   │   ├── search-project.dto.ts
        │   │   └── update-project.dto.ts
        │   ├── entities/
        │   │   ├── contract-organization.entity.ts
        │   │   ├── contract.entity.ts
        │   │   ├── organization.entity.ts
        │   │   ├── project-organization.entity.ts
        │   │   └── project.entity.ts
        │   ├── project.controller.ts
        │   ├── project.module.ts
        │   └── project.service.ts
        │
        ├── correspondence/     # ✉️ Core Document
        │   ├── dto/
        │   │   ├── add-reference.dto.ts
        │   │   ├── create-correspondence.dto.ts
        │   │   ├── search-correspondence.dto.ts
        │   │   └── workflow-action.dto.ts
        │   ├── entities/
        │   │   ├── correspondence-reference.entity.ts
        │   │   ├── correspondence-revision.entity.ts
        │   │   ├── correspondence-routing.entity.ts
        │   │   ├── correspondence-status.entity.ts
        │   │   ├── correspondence-type.entity.ts
        │   │   ├── correspondence.entity.ts
        │   │   └── routing-template.entity.ts
        │   ├── correspondence.controller.ts
        │   ├── correspondence.module.ts
        │   └── correspondence.service.ts
        │
        ├── drawing/            # 📐 Shop & Contract Drawings
        │   ├── dto/
        │   │   ├── create-contract-drawing.dto.ts
        │   │   ├── create-shop-drawing-revision.dto.ts
        │   │   ├── create-shop-drawing.dto.ts
        │   │   ├── search-contract-drawing.dto.ts
        │   │   ├── search-shop-drawing.dto.ts
        │   │   └── update-contract-drawing.dto.ts
        │   ├── entities/
        │   │   ├── contract-drawing-sub-category.entity.ts
        │   │   ├── contract-drawing-volume.entity.ts
        │   │   ├── contract-drawing.entity.ts
        │   │   ├── shop-drawing-main-category.entity.ts
        │   │   ├── shop-drawing-revision.entity.ts
        │   │   ├── shop-drawing-sub-category.entity.ts
        │   │   └── shop-drawing.entity.ts
        │   ├── contract-drawing.controller.ts
        │   ├── contract-drawing.service.ts
        │   ├── drawing-master-data.controller.ts
        │   ├── drawing-master-data.service.ts
        │   ├── drawing.module.ts
        │   ├── shop-drawing.controller.ts
        │   └── shop-drawing.service.ts
        │
        ├── rfa/                # ✅ Request for Approval
        │   ├── dto/
        │   │   ├── create-rfa.dto.ts
        │   │   ├── search-rfa.dto.ts
        │   │   └── update-rfa.dto.ts
        │   ├── entities/
        │   │   ├── rfa-approve-code.entity.ts
        │   │   ├── rfa-item.entity.ts
        │   │   ├── rfa-revision.entity.ts
        │   │   ├── rfa-status-code.entity.ts
        │   │   ├── rfa-type.entity.ts
        │   │   ├── rfa-workflow-template-step.entity.ts
        │   │   ├── rfa-workflow-template.entity.ts
        │   │   ├── rfa-workflow.entity.ts
        │   │   └── rfa.entity.ts
        │   ├── rfa.controller.ts
        │   ├── rfa.module.ts
        │   └── rfa.service.ts
        │
        ├── circulation/        # 🔄 Internal Routing
        │   ├── dto/
        │   │   ├── create-circulation.dto.ts
        │   │   ├── search-circulation.dto.ts
        │   │   └── update-circulation-routing.dto.ts
        │   ├── entities/
        │   │   ├── circulation-routing.entity.ts
        │   │   ├── circulation-status-code.entity.ts
        │   │   └── circulation.entity.ts
        │   ├── circulation.controller.ts
        │   ├── circulation.module.ts
        │   └── circulation.service.ts
        │
        ├── transmittal/        # 📤 Outgoing Documents
        │   ├── dto/
        │   │   ├── create-transmittal.dto.ts
        │   │   └── search-transmittal.dto.ts
        │   ├── entities/
        │   │   ├── transmittal-item.entity.ts
        │   │   └── transmittal.entity.ts
        │   ├── transmittal.controller.ts
        │   ├── transmittal.module.ts
        │   └── transmittal.service.ts
        │
        ├── notification/       # 🔔 Real-time & Queue
        │   ├── dto/
        │   │   ├── create-notification.dto.ts
        │   │   └── search-notification.dto.ts
        │   ├── entities/
        │   │   └── notification.entity.ts
        │   ├── notification-cleanup.service.ts
        │   ├── notification.controller.ts
        │   ├── notification.gateway.ts
        │   ├── notification.module.ts
        │   ├── notification.processor.ts
        │   └── notification.service.ts
        │
        ├── search/             # 🔍 Elasticsearch
        │   ├── dto/
        │   │   └── search-query.dto.ts
        │   ├── search.controller.ts
        │   ├── search.module.ts
        │   └── search.service.ts
        │
        ├── document-numbering/ # 🔢 Internal Numbering Service
        │   ├── entities/
        │   │   ├── document-number-counter.entity.ts
        │   │   └── document-number-format.entity.ts
        │   ├── document-numbering.module.ts
        │   └── document-numbering.service.ts
        │
        ├── workflow-engine/    # ⚙️ Unified Logic
        │   ├── interfaces/
        │   │   └── workflow.interface.ts
        │   ├── workflow-engine.module.ts
        │   └── workflow-engine.service.ts
        │
        └── json-schema/        # 📋 Validation Logic
            ├── json-schema.module.ts
            └── json-schema.service.ts

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