MIMAPP

This project is a comprehensive next-generation food delivery ecosystem. It consists of three independent applications, interconnected through a shared real-time PostgreSQL database, and designed to cover the entire value chain: from the customer to the driver, through the restaurant operator. The 3 Applications 📱 Client Application (React Native - Mobile) The consumer-facing application. It covers the entire purchase journey, from meal discovery to real-time delivery tracking. 🚗 Driver Application "Le Coursier" (React Native - Mobile) The field logistics application dedicated to drivers. It manages ride acceptance, background GPS tracking, and delivery confirmations. 🖥️ Admin Hub "Le Pilotage" (React Native Web - Tablet/Desktop) The control center for operators and restaurant owners. It provides 7 management modules covering restaurants, menus, orders, drivers, pricing, concierge service, and dispute resolution. This Food Delivery ecosystem is not an MVP (Minimum Viable Product). It is a complete, asynchronous, reactive, and secure software foundation covering the entire food delivery value chain. The architecture of three micro-applications connected via PostgreSQL Realtime guarantees: - Horizontal Scalability: Each application can evolve independently. - Transactional Integrity: PostgreSQL ACID compliance for orders and payments. - Real-Time Experience : Near-zero latency between the driver in the field and the client on their phone. - Business Intelligence: Nutritional matching, dynamic pricing, and gamification natively integrated.

• Monorepo Architecture & Frontend

  • Monorepo: All 3 applications coexist in a single repository (apps/ecrin, apps/course, apps/pilotage), enabling shared configuration and ecosystem consistency.
  • Expo Router: File-based routing ensuring predictable native navigation and native Deep Linking.
  • React Native: Native compilation for iOS and Android, delivering performance identical to native apps (direct access to hardware APIs: GPS, Haptics, Camera).
  • Zustand : Reactive global store, zero boilerplate. Used for the cart (cartStore) with local persistence.
  • Skeleton Loaders: Animated.timing animation (opacity 0.3 → 1.0 loop) for a visually premium loading experience.

• Backend & Database: PostgreSQL

  The infrastructure is powered by PostgreSQL, providing guarantees of performance, transactional integrity, and scalability.

  • Realtime WebSockets (Postgres Changes): Native WebSocket multiplexing. Mutations on tables (orders, driver_locations) trigger instant notifications to subscribed clients. Zero HTTP polling.
  • Row Level Security (RLS): Row-level security policies. Strict multi-tenant isolation: a client only sees their orders, a driver only their deliveries, a restaurant owner only their establishment.
  • PostgreSQL RPC Functions & Triggers: Business logic executed as close to the data as possible via stored procedures, reducing network latency and client-side compute cost.
  • Object Storage: Dish and restaurant images hosted in a cloud storage bucket with public URLs.

• Security & Identity Management

  • JWT (JSON Web Tokens): Cryptographic authentication with automatic renewal and encrypted local persistence via AsyncStorage.
  • RBAC (Role-Based Access Control): 3 strict roles (client, driver, admin) verified at both the UI level and the database rule level.
  • Role verification at login: The Driver app automatically rejects any non-driver user. The Admin app verifies admin or restaurant roles.

• Geolocation

  • Client: Haversine formula (pure mathematical calculation, zero API cost) for distance calculation.
  • Driver: expo-location with watchPositionAsync (high accuracy, 5s interval, 10m distance).
  • Client Tracking: react-native-maps with dynamic markers and polylines updated in real-time.