# Backend Progress Report

**Date:** 2025-12-07
**Status:** ✅ **Advanced / Nearly Complete (~90%)**

## 📊 Overview

| Task ID         | Title                     | Status            | Completion % | Notes                                                  |
| --------------- | ------------------------- | ----------------- | ------------ | ------------------------------------------------------ |
| **TASK-BE-001** | Database Migrations       | ✅ **Done**        | 100%         | Schema v1.5.1 active. TypeORM configured.              |
| **TASK-BE-002** | Auth & RBAC               | ✅ **Done**        | 100%         | JWT, Refresh Token, RBAC Guard, Permissions complete.  |
| **TASK-BE-003** | File Storage              | ✅ **Done**        | 100%         | MinIO/S3 strategies implemented (in `common`).         |
| **TASK-BE-004** | Document Numbering        | ✅ **Done**        | 100%         | **High Quality**: Redlock + Optimistic Locking logic.  |
| **TASK-BE-005** | Correspondence Module     | ✅ **Done**        | 95%          | CRUD, Workflow Submit, References, Audit Log complete. |
| **TASK-BE-006** | Workflow Engine           | ✅ **Done**        | 100%         | DSL Evaluator, Versioning, Event Dispatching complete. |
| **TASK-BE-007** | RFA Module                | ✅ **Done**        | 95%          | Full Swagger, Revision handling, Workflow integration. |
| **TASK-BE-008** | Drawing Module            | ✅ **Done**        | 95%          | Split into `ShopDrawing` & `ContractDrawing`.          |
| **TASK-BE-009** | Circulation & Transmittal | ✅ **Done**        | 90%          | Modules exist and registered in `app.module.ts`.       |
| **TASK-BE-010** | Search (Elasticsearch)    | 🚧 **In Progress** | 80%          | Module registered, needs deep verification of mapping. |
| **TASK-BE-011** | Notification & Audit      | ✅ **Done**        | 100%         | Global Audit Interceptor & Notification Module active. |
| **TASK-BE-012** | Master Data Management    | ✅ **Done**        | 100%         | Disciplines, SubTypes, Tags, Config APIs complete.     |
| **TASK-BE-013** | User Management           | ✅ **Done**        | 100%         | CRUD, Assignments, Preferences, Soft Delete complete.  |

## 🛠 Detailed Findings by Component

### 1. Core Architecture (✅ Excellent)
- **Modular Design:** Strict separation of concerns (Modules, Controllers, Services, Entities).
- **Security:** Global Throttling, Maintenance Mode Guard, RBAC Guards (`@RequirePermission`) everywhere.
- **Resilience:** Redis-based Idempotency & Distributed Locking (`Redlock`) implemented in critical services like Document Numbering.
- **Observability:** Winston Logger & Global Audit Interceptor integrated.

### 2. Workflow Engine (✅ Standout Feature)
- Implements a **DSL-based** engine supporting complex transitions.
- Supports **Versioning** of workflow definitions (saving old versions automatically).
- **Hybrid Approach:** Supports both new DSL logic and legacy rigid logic for backward compatibility.
- **Transactional:** Uses `QueryRunner` for atomic status updates & history logging.

### 3. Business Logic
- **Document Numbering:** Very robust. Handles concurrency with Redlock + Optimistic Loop. Solves the "Duplicate Number" problem effectively.
- **Correspondence & RFA:** Standardized controllers with Swagger documentation (`@ApiTags`, `@ApiOperation`).
- **Drawing:** Correctly separated into `Shop` vs `Contract` drawings distinct logic.

### 4. Integration Points
- **Frontend-Backend:**
  - Token payload now maps `username` correctly (Frontend task just fixed this).
  - Backend returns standard DTOs.
  - Swagger UI is likely available at `/api/docs` (standard NestJS setup).

## 🚀 Recommendations
1.  **Integration Testing:** Since individual modules are complete, focus on **E2E Tests** simulating full flows (e.g., Create RFA -> Submit -> Approve -> Check Notification).
2.  **Search Indexing:** Verify that created documents are actually being pushed to Elasticsearch (check `SearchService` consumers).
3.  **Real-world Load:** Test the Document Numbering `Redlock` with concurrent requests to ensure it holds up under load.