# Changelog

All notable changes to the GoodGo Platform will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [Unreleased]

### Added
- Multi-stage production Dockerfile for NestJS API
- Startup-time validation for JWT secrets (rejects placeholders)

---

## [1.4.0] - 2026-04-08

### Added
- Redis caching for user quota checks with prefix-based cache invalidation
- Domain layer unit tests across all modules (auth, payments, subscriptions, admin, analytics, listings, notifications, reviews, search, metrics)
- Health check endpoints (`/health`, `/health/db`, `/health/redis`) using `@nestjs/terminus`
- Property Valuation UI with AVM (Automated Valuation Model) integration on the web frontend

### Changed
- Improved cache service with prefix-based clearing patterns
- Enhanced analytics query handlers with caching layer

### Fixed
- Lint errors resolved across codebase

---

## [1.3.0] - 2026-03-28

### Added
- Complete notification delivery system with email (Nodemailer + Handlebars), push (Firebase Cloud Messaging), and in-app channels
- Mapbox district heatmap visualization and agent performance dashboard on web frontend
- Reviews module with full CRUD endpoints, CQRS handlers, and 1-5 star rating value objects
- Unit tests for analytics, metrics, notifications, payments, and search modules
- Enhanced geo-search with PostGIS spatial queries and Typesense listing-approved event handlers
- Dedicated `/health` endpoint with timestamp response

### Changed
- Refactored cache service internals and analytics handlers for better reliability

### Fixed
- Missing `AuthState` properties in web frontend test mocks
- E2E workflow improvements: Prisma generate step, browser cache, trace artifacts

---

## [1.2.0] - 2026-03-20

### Added
- React Query integration for data fetching with error retry UX
- Dark mode toggle for web frontend
- Redis caching layer for search and analytics hot paths
- Vietnamese NLP pipeline (Underthesea) for property description analysis in AI services
- Prometheus `MetricsService`, `HttpMetricsInterceptor`, and custom metric constants
- Agent Profile, KYC verification, Subscription, and Payment dashboard pages on web frontend
- Unit tests for MCP servers (property search, market analytics, valuation)
- Unit tests for web frontend validations and utility functions

### Fixed
- Removed MinIO hardcoded credentials; added presigned URL support for media uploads
- JWT secret enforcement in all environments (not just production)
- Added missing `Review.userId` index for FK query performance

---

## [1.1.0] - 2026-03-12

### Added
- Listing duplicate detection service to prevent redundant property submissions
- Subscription quota enforcement with per-plan feature limits and usage metering
- Google and Zalo OAuth backend strategies for social login
- 58 unit tests covering critical auth, payment, and subscription paths
- Loading skeletons, error boundaries, and accessibility improvements on web frontend
- Sentry error tracking integration for both API and web apps

### Fixed
- Hardened production Docker deployment configuration for all services

---

## [1.0.0] - 2026-03-01

### Added

#### Authentication & Security
- User registration and login with phone number and password
- JWT access tokens (15-minute expiry) with refresh token rotation (7-day expiry)
- Token family-based rotation detection to prevent replay attacks
- OAuth social login support (Google, Zalo)
- KYC (Know Your Customer) verification workflow (NONE -> PENDING -> VERIFIED/REJECTED)
- Role-based access control with `@Roles()` decorator (USER, AGENT, ADMIN)
- Rate limiting: 60 req/min default, 10 req/min auth, 20 req/min payment callbacks
- `ThrottlerBehindProxyGuard` for X-Forwarded-For-aware IP tracking
- Helmet security headers, CORS configuration
- Input validation (class-validator) and content sanitization (sanitize-html)
- CSRF protection with double-submit cookie pattern
- PII masking in structured logs (Pino)
- Bcrypt password hashing

#### Property Listings
- Full CRUD for property listings with status state machine (DRAFT -> PENDING_REVIEW -> ACTIVE -> RESERVED -> SOLD/RENTED)
- Media upload support (S3/MinIO) with file validation
- AI-assisted moderation scoring via Claude API
- Admin moderation queue with bulk approve/reject
- Quota-gated listing creation tied to subscription plans

#### Search & Discovery
- Full-text property search via Typesense with Vietnamese language support
- Geo-spatial search using PostGIS (lat/long + radius queries)
- Faceted filtering by price, property type, bedrooms, district
- Event-driven search index updates (listing approved/updated/sold -> re-index)
- Prefix-based cache invalidation for search results

#### Payments
- Payment processing with VNPay, MoMo, and ZaloPay provider integration
- Idempotent webhook callback handling with signature verification
- Payment refund support
- Atomic status transitions (PENDING -> COMPLETED/FAILED)
- Event emission on payment completion/failure for downstream processing

#### Subscriptions & Billing
- Subscription plans with tiered feature flags (JSON columns)
- Usage metering and quota enforcement (Redis-backed)
- Plan upgrades and cancellations
- Billing history tracking
- Event-driven usage tracking (`listing.created` -> meter usage)

#### Admin Panel
- Dashboard with system-wide statistics
- User management (list, view, ban/unban)
- KYC approval queue with approve/reject actions
- Listing moderation queue with bulk moderation
- Revenue statistics and analytics
- Subscription adjustment for individual users

#### Analytics & Market Data
- District-level market reports with PostGIS spatial aggregation
- Price trend analysis by property type and district
- District heatmap data (geo aggregates)
- Market index tracking and updates
- Cache-based report delivery

#### Notifications
- Multi-channel notification delivery: EMAIL, SMS, PUSH (FCM), IN_APP
- 8 event-driven listeners: welcome email, KYC approval, listing approval/rejection, payment confirmation/failure, subscription expiry, quota exceeded
- Handlebars email templates with Vietnamese localization
- User notification preferences (opt-out per channel/type)

#### Reviews
- Property and agent reviews with 1-5 star ratings
- Review CRUD with target polymorphism (agent or property)
- Average rating calculation per target

#### MCP (Model Context Protocol) Servers
- Property Search Server: `search_properties`, `compare_properties`, `get_property_details`
- Market Analytics Server: `get_market_report`, `analyze_trends`, `get_price_indices`
- Valuation Server: `estimate_valuation`, `extract_features`, `compare_valuations` (XGBoost via FastAPI)
- HTTP transport controller with `McpRegistryService`

#### AI Services
- FastAPI microservice with XGBoost property valuation model
- Claude API-powered content moderation for listing descriptions
- Vietnamese NLP preprocessing with Underthesea

#### Infrastructure
- PostgreSQL 16 with PostGIS extension (22 models, spatial indexes)
- Redis caching layer for search, analytics, quota, and session data
- Typesense search engine with Vietnamese language support
- Prometheus metrics endpoint with HTTP request duration histograms and error rate counters
- Grafana dashboards auto-provisioned from `monitoring/` directory
- Pino structured JSON logging with correlation IDs
- Prisma ORM with migration system and seed data (Ho Chi Minh City districts/wards, sample properties, subscription plans)

#### Frontend (Next.js 14)
- App Router with Tailwind CSS and Zustand state management
- Property search page with Mapbox GL map integration
- Listing detail pages with media gallery
- Agent dashboard with KYC, subscription, and payment management
- District heatmap visualization
- Property valuation UI with AVM integration
- Dark mode toggle
- Loading skeletons and error boundaries
- Vietnamese UI text throughout (property types, districts, currency in VND)

#### Developer Experience
- Monorepo with pnpm workspaces and Turborepo
- ESLint with import ordering rules
- Prettier code formatting
- Husky git hooks
- E2E tests with Playwright (14 web test files)
- GitHub Actions CI pipeline (lint -> typecheck -> test -> build)

### Security
- httpOnly cookie-based token storage with CSRF hardening
- Idempotency keys on payment flows with amount validation
- Magic byte file validation for media uploads
- Admin audit logging
- JWT audience/issuer validation
- Production environment variable validation
- Sanitized `.env.example` (no leaked secrets)
- Graceful shutdown hooks for clean process termination

[Unreleased]: https://github.com/goodgo/platform-ai/compare/v1.4.0...HEAD
[1.4.0]: https://github.com/goodgo/platform-ai/compare/v1.3.0...v1.4.0
[1.3.0]: https://github.com/goodgo/platform-ai/compare/v1.2.0...v1.3.0
[1.2.0]: https://github.com/goodgo/platform-ai/compare/v1.1.0...v1.2.0
[1.1.0]: https://github.com/goodgo/platform-ai/compare/v1.0.0...v1.1.0
[1.0.0]: https://github.com/goodgo/platform-ai/releases/tag/v1.0.0