# rohitvaddepalli/mern-marketplace architecture

> Architecture diagram of the GitHub repository rohitvaddepalli/mern-marketplace, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-27). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/rohitvaddepalli/mern-marketplace
- Repository: https://github.com/rohitvaddepalli/mern-marketplace

## Overview

Marketplace is a role-based commerce application: buyers discover products, check out, and follow orders; sellers manage stores, listings, inventory, and sales; administrators oversee platform entities and analytics. The React app provides role-specific interfaces and shared auth, cart, and socket state, while Express routes dispatch requests to controllers and MongoDB models. The README documents product capabilities beyond the sampled implementation, so those subsystems are represented at their supported directory paths; links whose wiring was not sampled are omitted.

Main entry points: [`backend/server.js`](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/server.js) (HTTP server), [`frontend/src/App.js`](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/frontend/src/App.js) (React app), [`backend/controllers/adminController.js`](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/adminController.js) (Platform administration), [`backend/controllers/orderController.js`](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/orderController.js) (Order operations)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_client["Marketplace UI"]
  node_app["React app<br/>[App.js]"]
  node_buyer_pages["Buyer pages"]
  node_seller_pages["Seller pages"]
  node_admin_pages["Admin pages"]
  node_shared_state["Shared state"]
  node_api_client["API client<br/>[api.js]"]
end

subgraph group_api["API and Access"]
  node_server["HTTP server<br/>[server.js]"]
  node_auth_routes["Auth routes<br/>[authRoutes.js]"]
  node_auth_controller["Auth controller<br/>[authController.js]"]
  node_auth_service["Auth service<br/>[authService.js]"]
  node_product_routes["Product routes<br/>[productRoutes.js]"]
  node_store_routes["Store routes<br/>[storeRoutes.js]"]
  node_order_routes["Order routes<br/>[orderRoutes.js]"]
  node_admin_routes["Admin routes<br/>[adminRoutes.js]"]
  node_analytics_routes["Analytics routes<br/>[analyticsRoutes.js]"]
  node_chat_routes["Chat routes<br/>[chat.js]"]
end

subgraph group_commerce["Commerce Operations"]
  node_products["Product operations"]
  node_stores["Store operations<br/>[storeController.js]"]
  node_orders["Order operations<br/>[orderController.js]"]
  node_reviews["Review operations"]
  node_admin_ops["Platform administration<br/>[adminController.js]"]
end

subgraph group_data["Marketplace Data"]
  node_user_db[("User records<br/>[User.js]")]
  node_product_db[("Product records<br/>[Product.js]")]
  node_store_db[("Store records<br/>[Store.js]")]
  node_order_db[("Order records<br/>[Order.js]")]
  node_review_db[("Review records<br/>[Review.js]")]
  node_settings_db[("Platform settings<br/>[Settings.js]")]
end

subgraph group_realtime["Realtime and Insights"]
  node_analytics["Sales analytics"]
  node_chat_ui["Chat interface<br/>[ChatBox.js]"]
  node_socket_state["Socket context<br/>[SocketContext.js]"]
  node_socket_server["Socket.IO<br/>[server.js]"]
end

node_buyer(("Buyer"))
node_seller(("Seller"))
node_admin(("Administrator"))

node_buyer -->|"uses"| node_app
node_seller -->|"uses"| node_app
node_admin -->|"uses"| node_app
node_app -->|"renders"| node_buyer_pages
node_app -->|"renders"| node_seller_pages
node_app -->|"renders"| node_admin_pages
node_app -->|"provides"| node_shared_state
node_buyer_pages -->|"requests"| node_api_client
node_seller_pages -->|"requests"| node_api_client
node_admin_pages -->|"requests"| node_api_client
node_api_client -->|"calls API"| node_server
node_server -->|"mounts"| node_auth_routes
node_server -->|"mounts"| node_product_routes
node_server -->|"mounts"| node_store_routes
node_server -->|"mounts"| node_order_routes
node_server -->|"mounts"| node_admin_routes
node_server -->|"mounts"| node_analytics_routes
node_server -->|"mounts"| node_chat_routes
node_auth_routes -->|"dispatches"| node_auth_controller
node_auth_controller -->|"calls"| node_auth_service
node_auth_controller -->|"reads/writes"| node_user_db
node_product_routes -->|"dispatches"| node_products
node_product_routes -->|"dispatches"| node_reviews
node_store_routes -->|"dispatches"| node_stores
node_order_routes -->|"dispatches"| node_orders
node_admin_routes -->|"dispatches"| node_admin_ops
node_analytics_routes -->|"dispatches"| node_analytics
node_products -->|"reads/writes"| node_product_db
node_stores -->|"reads/writes"| node_store_db
node_orders -->|"reads/writes"| node_order_db
node_orders -->|"checks items"| node_product_db
node_orders -->|"reads settings"| node_settings_db
node_reviews -->|"checks product"| node_product_db
node_reviews -->|"checks purchase"| node_order_db
node_reviews -->|"reads/writes"| node_review_db
node_admin_ops -->|"manages"| node_user_db
node_admin_ops -->|"manages"| node_store_db
node_admin_ops -->|"manages"| node_product_db
node_admin_ops -->|"manages"| node_order_db
node_admin_ops -->|"reads settings"| node_settings_db
node_chat_ui -->|"uses"| node_socket_state
node_socket_state -->|"connects"| node_socket_server
node_orders -->|"emits events"| node_socket_server

click node_app "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/frontend/src/App.js"
click node_buyer_pages "https://github.com/rohitvaddepalli/mern-marketplace/tree/main/frontend/src/pages"
click node_seller_pages "https://github.com/rohitvaddepalli/mern-marketplace/tree/main/frontend/src/pages/Seller"
click node_admin_pages "https://github.com/rohitvaddepalli/mern-marketplace/tree/main/frontend/src/pages/Admin"
click node_shared_state "https://github.com/rohitvaddepalli/mern-marketplace/tree/main/frontend/src/context"
click node_api_client "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/frontend/src/services/api.js"
click node_server "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/server.js"
click node_auth_routes "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/authRoutes.js"
click node_auth_controller "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/authController.js"
click node_auth_service "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/services/authService.js"
click node_product_routes "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/productRoutes.js"
click node_store_routes "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/storeRoutes.js"
click node_order_routes "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/orderRoutes.js"
click node_admin_routes "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/adminRoutes.js"
click node_analytics_routes "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/analyticsRoutes.js"
click node_chat_routes "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/chat.js"
click node_products "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/productController.js"
click node_stores "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/storeController.js"
click node_orders "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/orderController.js"
click node_reviews "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/reviewController.js"
click node_admin_ops "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/adminController.js"
click node_analytics "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/services/analyticsService.js"
click node_chat_ui "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/frontend/src/components/Chat/ChatBox.js"
click node_socket_state "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/frontend/src/context/SocketContext.js"
click node_socket_server "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/server.js"
click node_user_db "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/User.js"
click node_product_db "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/Product.js"
click node_store_db "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/Store.js"
click node_order_db "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/Order.js"
click node_review_db "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/Review.js"
click node_settings_db "https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/Settings.js"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_app,node_buyer_pages,node_seller_pages,node_admin_pages,node_shared_state,node_api_client toneBlue
class node_server,node_auth_routes,node_auth_controller,node_auth_service,node_product_routes,node_store_routes,node_order_routes,node_admin_routes,node_analytics_routes,node_chat_routes toneAmber
class node_products,node_stores,node_orders,node_reviews,node_admin_ops toneMint
class node_user_db,node_product_db,node_store_db,node_order_db,node_review_db,node_settings_db toneRose
class node_analytics,node_chat_ui,node_socket_state,node_socket_server,node_buyer,node_seller,node_admin toneIndigo
```

## Components

### Marketplace UI

- [React app](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/frontend/src/App.js): `frontend/src/App.js`
- [Buyer pages](https://github.com/rohitvaddepalli/mern-marketplace/tree/main/frontend/src/pages): `frontend/src/pages`
- [Seller pages](https://github.com/rohitvaddepalli/mern-marketplace/tree/main/frontend/src/pages/Seller): `frontend/src/pages/Seller`
- [Admin pages](https://github.com/rohitvaddepalli/mern-marketplace/tree/main/frontend/src/pages/Admin): `frontend/src/pages/Admin`
- [Shared state](https://github.com/rohitvaddepalli/mern-marketplace/tree/main/frontend/src/context): `frontend/src/context`
- [API client](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/frontend/src/services/api.js): `frontend/src/services/api.js`

### API and Access

- [HTTP server](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/server.js): `backend/server.js`
- [Auth routes](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/authRoutes.js): `backend/routes/authRoutes.js`
- [Auth controller](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/authController.js): `backend/controllers/authController.js`
- [Auth service](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/services/authService.js): `backend/services/authService.js`
- [Product routes](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/productRoutes.js): `backend/routes/productRoutes.js`
- [Store routes](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/storeRoutes.js): `backend/routes/storeRoutes.js`
- [Order routes](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/orderRoutes.js): `backend/routes/orderRoutes.js`
- [Admin routes](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/adminRoutes.js): `backend/routes/adminRoutes.js`
- [Analytics routes](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/analyticsRoutes.js): `backend/routes/analyticsRoutes.js`
- [Chat routes](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/routes/chat.js): `backend/routes/chat.js`

### Commerce Operations

- [Product operations](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/productController.js): `backend/controllers/productController.js`
- [Store operations](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/storeController.js): `backend/controllers/storeController.js`
- [Order operations](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/orderController.js): `backend/controllers/orderController.js`
- [Review operations](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/reviewController.js): `backend/controllers/reviewController.js`
- [Platform administration](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/controllers/adminController.js): `backend/controllers/adminController.js`

### Marketplace Data

- [User records](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/User.js): `backend/models/User.js`
- [Product records](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/Product.js): `backend/models/Product.js`
- [Store records](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/Store.js): `backend/models/Store.js`
- [Order records](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/Order.js): `backend/models/Order.js`
- [Review records](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/Review.js): `backend/models/Review.js`
- [Platform settings](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/models/Settings.js): `backend/models/Settings.js`

### Realtime and Insights

- [Sales analytics](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/services/analyticsService.js): `backend/services/analyticsService.js`
- [Chat interface](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/frontend/src/components/Chat/ChatBox.js): `frontend/src/components/Chat/ChatBox.js`
- [Socket context](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/frontend/src/context/SocketContext.js): `frontend/src/context/SocketContext.js`
- [Socket.IO](https://github.com/rohitvaddepalli/mern-marketplace/blob/main/backend/server.js): `backend/server.js`

### Other components

- **Buyer**
- **Seller**
- **Administrator**

## Connections

- Buyer → React app: uses
- Seller → React app: uses
- Administrator → React app: uses
- React app → Buyer pages: renders
- React app → Seller pages: renders
- React app → Admin pages: renders
- React app → Shared state: provides
- Buyer pages → API client: requests
- Seller pages → API client: requests
- Admin pages → API client: requests
- API client → HTTP server: calls API
- HTTP server → Auth routes: mounts
- HTTP server → Product routes: mounts
- HTTP server → Store routes: mounts
- HTTP server → Order routes: mounts
- HTTP server → Admin routes: mounts
- HTTP server → Analytics routes: mounts
- HTTP server → Chat routes: mounts
- Auth routes → Auth controller: dispatches
- Auth controller → Auth service: calls
- Auth controller → User records: reads/writes
- Product routes → Product operations: dispatches
- Product routes → Review operations: dispatches
- Store routes → Store operations: dispatches
- Order routes → Order operations: dispatches
- Admin routes → Platform administration: dispatches
- Analytics routes → Sales analytics: dispatches
- Product operations → Product records: reads/writes
- Store operations → Store records: reads/writes
- Order operations → Order records: reads/writes
- Order operations → Product records: checks items
- Order operations → Platform settings: reads settings
- Review operations → Product records: checks product
- Review operations → Order records: checks purchase
- Review operations → Review records: reads/writes
- Platform administration → User records: manages
- Platform administration → Store records: manages
- Platform administration → Product records: manages
- Platform administration → Order records: manages
- Platform administration → Platform settings: reads settings
- Chat interface → Socket context: uses
- Socket context → Socket.IO: connects
- Order operations → Socket.IO: emits events