PROGRESS.md

MESO MVP - Development Progress

Completed

Phase 1: Project Setup & Documentation

• Root README with architecture overview
• Server README with SOLID architecture explanation
• Client README with state management patterns
• Comprehensive project structure documentation

Phase 2: Backend Infrastructure (NestJS)

Configuration & Environment

• .env.example with all required variables
• package.json with all dependencies
• tsconfig.json with strict settings
• .eslintrc.js with TypeScript rules
• Dockerfile for production deployment
• docker-compose.yml for development stack
• .dockerignore for clean builds

Core Framework

• src/main.ts - Application bootstrap with Swagger
• src/app.module.ts - Root module with all imports
• src/app.controller.ts - Health check endpoint
• src/app.service.ts - Health check service

Common Utilities

• src/common/dto/response.dto.ts - Standardized API response format
• src/common/filters/all-exceptions.filter.ts - Global error handling
• src/common/interceptors/response.interceptor.ts - Response wrapping
• src/common/prisma/prisma.service.ts - Database connection
• src/common/prisma/prisma.module.ts - Prisma DI

Database

• prisma/schema.prisma - Complete schema with 11 tables
  • Users, Mess, MessMembers, Months, Meals, Costs, CostDistribution
  • Deposits, Settlement, BazarDates
• Database indexes for performance
• Relationships and constraints

Authentication Module

• src/modules/auth/auth.module.ts - Module definition
• src/modules/auth/controllers/auth.controller.ts - Google OAuth endpoints
• src/modules/auth/services/auth.service.ts - Token & user management
• src/modules/auth/strategies/jwt.strategy.ts - JWT validation
• src/modules/auth/strategies/google.strategy.ts - Google OAuth flow

Users Module (Repository Pattern)

• src/modules/users/users.module.ts - Module definition
• src/modules/users/controllers/users.controller.ts - User endpoints
• src/modules/users/services/users.service.ts - Business logic
• src/modules/users/repositories/users.repository.ts - Data access layer

Mess Module (Repository Pattern)

• src/modules/mess/mess.module.ts - Module definition
• src/modules/mess/controllers/mess.controller.ts - Mess endpoints
• src/modules/mess/services/mess.service.ts - Business logic
• src/modules/mess/repositories/mess.repository.ts - Data access layer

Months Module (Repository Pattern)

• src/modules/months/months.module.ts - Module definition
• src/modules/months/controllers/months.controller.ts - Month endpoints
• src/modules/months/services/months.service.ts - Business logic
• src/modules/months/repositories/months.repository.ts - Data access layer

Members Module (Repository Pattern)

• src/modules/members/members.module.ts - Module definition
• src/modules/members/controllers/members.controller.ts - Member endpoints
• src/modules/members/services/members.service.ts - Business logic
• src/modules/members/repositories/members.repository.ts - Data access layer

Meals Module (Cursor Pagination)

• src/modules/meals/meals.module.ts - Module definition
• src/modules/meals/controllers/meals.controller.ts - Meal endpoints
• src/modules/meals/services/meals.service.ts - Business logic + pagination
• src/modules/meals/repositories/meals.repository.ts - Data access layer

Costs Module (Repository Pattern)

• src/modules/costs/costs.module.ts - Module definition
• src/modules/costs/controllers/costs.controller.ts - Cost endpoints
• src/modules/costs/services/costs.service.ts - Business logic
• src/modules/costs/repositories/costs.repository.ts - Data access layer

Deposits Module (Repository Pattern)

• src/modules/deposits/deposits.module.ts - Module definition
• src/modules/deposits/controllers/deposits.controller.ts - Deposit endpoints
• src/modules/deposits/services/deposits.service.ts - Business logic
• src/modules/deposits/repositories/deposits.repository.ts - Data access layer

Settlement Module (Calculation Engine)

• src/modules/settlement/settlement.module.ts - Module definition
• src/modules/settlement/controllers/settlement.controller.ts - Settlement endpoint
• src/modules/settlement/services/settlement.service.ts - Calculation logic
• src/modules/settlement/repositories/settlement.repository.ts - Data access layer

Reports Module

• src/modules/reports/reports.module.ts - Module definition
• src/modules/reports/controllers/reports.controller.ts - PDF endpoints
• src/modules/reports/services/reports.service.ts - Report generation

Phase 3: Frontend Infrastructure (React + Vite)

Configuration & Environment

• client/package.json - All dependencies installed
• client/.env.example - Environment variables template
• client/vite.config.ts - Vite configuration with API proxy
• client/tsconfig.json - TypeScript strict settings
• client/tsconfig.node.json - Node TypeScript settings
• client/tailwind.config.ts - Tailwind color theme
• client/postcss.config.js - PostCSS setup
• client/.eslintrc.cjs - ESLint configuration

Type Safety

• client/src/types/common.ts - All TypeScript interfaces
  • User, Auth, API Response types
  • Mess, Member, Month, Meal, Cost, Deposit, Settlement types
  • Enums for Role, Status, Types

API Client

• client/src/services/api.ts - Axios-based API client
  • Request/response interceptors
  • JWT token management
  • Fully typed responses
  • Generic methods (get, post, put, delete)

To Do

Backend (NestJS)

• Complete DTOs for each module
• Add validation decorators (class-validator)
• Implement error handling edge cases
• Add rate limiting
• Add logging module
• Add caching with Redis
• Unit tests for services
• E2E tests for API
• Database seed script

Frontend (React + Vite)

• Create Zustand stores (auth, mess, meals, costs, etc.)
• Create React Query hooks
• Create service layer methods for each API endpoint
• Build page components
• Build reusable UI components
• Add form validation with React Hook Form + Zod
• Add loading and error states
• Add PDF export functionality
• Add real-time calculation updates
• Add responsive design

Integration

• Connect frontend to backend API
• Test authentication flow
• Test full user workflows
• Performance optimization
• Security review
• Accessibility audit

Architecture Summary

Backend (Controller → Service → Repository)

Each module follows strict SOLID principles:

1. Controller: HTTP endpoints, validation, request/response handling
2. Service: Business logic, calculations, orchestration
3. Repository: Data access, Prisma queries, database operations

Frontend (Zustand + React Query + Services)

1. Services: API client methods with fully typed responses
2. React Query: Data fetching, caching, synchronization
3. Zustand Stores: Real-time state management, calculations
4. Components: Presentational components with hooks

Database

PostgreSQL with Prisma ORM featuring:

• Full type safety with generated types
• Optimized indexes on foreign keys and filtered columns
• Cursor-based pagination for large datasets
• JSON fields for flexible data storage

Next Steps

1. Run docker-compose up to start PostgreSQL and migrations
2. Implement DTOs and validation for each module
3. Build frontend stores and hooks
4. Create React pages and components
5. Connect frontend to backend and test workflows