# mrunalg141/e-commerce- architecture

> Architecture diagram of the GitHub repository mrunalg141/e-commerce-, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-28). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/mrunalg141/e-commerce-
- Repository: https://github.com/mrunalg141/e-commerce-

## Overview

This repository combines a React storefront with an Express/MongoDB API. The customer workflow is product discovery and detail viewing, adding items to a persistent cart, and visiting the account page; the backend currently exposes a health route, while broader commerce endpoints are documented as planned. The graph distinguishes storefront behavior from API infrastructure and domain schemas. The tree and README identify additional API capabilities, but sampled backend routes do not show them wired into request handling.

Main entry points: [`frontend/src/App.jsx`](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/App.jsx) (Storefront routes), [`frontend/src/context/CartContext.jsx`](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/context/CartContext.jsx) (Cart state), [`src/app.js`](https://github.com/mrunalg141/e-commerce-/blob/main/src/app.js) (Express app), [`src/routes/index.js`](https://github.com/mrunalg141/e-commerce-/blob/main/src/routes/index.js) (API routes)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_storefront["Storefront"]
  node_frontend_app["Storefront routes<br/>[App.jsx]"]
  node_layout["Page layout<br/>[Layout.jsx]"]
  node_home["Home page<br/>[Home.jsx]"]
  node_shop["Shop page<br/>[Shop.jsx]"]
  node_details["Product details<br/>[ProductDetails.jsx]"]
  node_account["Account page<br/>[Account.jsx]"]
  node_product_card["Product card<br/>[ProductCard.jsx]"]
end

subgraph group_commerce["Cart and catalog"]
  node_catalog_data["Product data<br/>[products.js]"]
  node_cart_context["Cart state<br/>[CartContext.jsx]"]
  node_cart_page["Cart page<br/>[Cart.jsx]"]
end

subgraph group_api["API runtime"]
  node_api_client["API client<br/>[api.js]"]
  node_api_server["API server<br/>[server.js]"]
  node_express_app["Express app<br/>[app.js]"]
  node_api_routes["API routes<br/>[index.js]"]
  node_mongo_config["Database connection<br/>[database.js]"]
end

subgraph group_security["Security and API support"]
  node_auth_middleware["JWT authorization<br/>[auth.js]"]
  node_validation["Request validation<br/>[validation.js]"]
  node_error_handler["Error handling<br/>[errorHandler.js]"]
  node_swagger["API documentation<br/>[swagger.js]"]
end

subgraph group_domain["Domain data"]
  node_domain_models["Commerce schemas"]
end

node_shopper(("Shopper"))
node_browser(("Browser"))
node_local_storage[("Browser storage")]
node_mongodb[("MongoDB")]

node_shopper -->|"uses"| node_browser
node_browser -->|"opens"| node_frontend_app
node_frontend_app -->|"renders"| node_layout
node_frontend_app -->|"routes"| node_home
node_frontend_app -->|"routes"| node_shop
node_frontend_app -->|"routes"| node_details
node_frontend_app -->|"routes"| node_cart_page
node_frontend_app -->|"routes"| node_account
node_home -->|"renders"| node_product_card
node_shop -->|"renders"| node_product_card
node_product_card -->|"reads"| node_catalog_data
node_details -->|"reads"| node_catalog_data
node_frontend_app -->|"provides"| node_cart_context
node_cart_page -->|"reads and updates"| node_cart_context
node_cart_context -->|"persists"| node_local_storage
node_product_card -->|"adds items"| node_cart_context
node_details -->|"adds items"| node_cart_context
node_account -.->|"requests"| node_api_client
node_api_client -.->|"HTTP requests"| node_api_server
node_api_server -->|"connects"| node_mongo_config
node_api_server -->|"starts"| node_express_app
node_express_app -->|"mounts"| node_api_routes
node_express_app -->|"sets up"| node_swagger
node_express_app -->|"registers"| node_error_handler
node_mongo_config -->|"connects"| node_mongodb
node_api_routes -.->|"planned API use"| node_domain_models
node_api_routes -.->|"planned protection"| node_auth_middleware
node_api_routes -.->|"planned validation"| node_validation

click node_frontend_app "https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/App.jsx"
click node_layout "https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/components/Layout.jsx"
click node_home "https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/pages/Home.jsx"
click node_shop "https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/pages/Shop.jsx"
click node_details "https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/pages/ProductDetails.jsx"
click node_account "https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/pages/Account.jsx"
click node_product_card "https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/components/ProductCard.jsx"
click node_catalog_data "https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/data/products.js"
click node_cart_context "https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/context/CartContext.jsx"
click node_cart_page "https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/pages/Cart.jsx"
click node_api_client "https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/services/api.js"
click node_api_server "https://github.com/mrunalg141/e-commerce-/blob/main/server.js"
click node_express_app "https://github.com/mrunalg141/e-commerce-/blob/main/src/app.js"
click node_api_routes "https://github.com/mrunalg141/e-commerce-/blob/main/src/routes/index.js"
click node_mongo_config "https://github.com/mrunalg141/e-commerce-/blob/main/src/config/database.js"
click node_auth_middleware "https://github.com/mrunalg141/e-commerce-/blob/main/src/middleware/auth.js"
click node_validation "https://github.com/mrunalg141/e-commerce-/blob/main/src/middleware/validation.js"
click node_error_handler "https://github.com/mrunalg141/e-commerce-/blob/main/src/middleware/errorHandler.js"
click node_swagger "https://github.com/mrunalg141/e-commerce-/blob/main/src/config/swagger.js"
click node_domain_models "https://github.com/mrunalg141/e-commerce-/tree/main/models"

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_frontend_app,node_layout,node_home,node_shop,node_details,node_account,node_product_card,node_browser toneBlue
class node_catalog_data,node_cart_context,node_cart_page,node_local_storage,node_mongodb toneAmber
class node_api_client,node_api_server,node_express_app,node_api_routes,node_mongo_config toneMint
class node_auth_middleware,node_validation,node_error_handler,node_swagger toneRose
class node_domain_models,node_shopper toneIndigo
```

## Components

### Storefront

- [Storefront routes](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/App.jsx): `frontend/src/App.jsx`
- [Page layout](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/components/Layout.jsx): `frontend/src/components/Layout.jsx`
- [Home page](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/pages/Home.jsx): `frontend/src/pages/Home.jsx`
- [Shop page](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/pages/Shop.jsx): `frontend/src/pages/Shop.jsx`
- [Product details](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/pages/ProductDetails.jsx): `frontend/src/pages/ProductDetails.jsx`
- [Account page](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/pages/Account.jsx): `frontend/src/pages/Account.jsx`
- [Product card](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/components/ProductCard.jsx): `frontend/src/components/ProductCard.jsx`

### Cart and catalog

- [Product data](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/data/products.js): `frontend/src/data/products.js`
- [Cart state](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/context/CartContext.jsx): `frontend/src/context/CartContext.jsx`
- [Cart page](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/pages/Cart.jsx): `frontend/src/pages/Cart.jsx`

### API runtime

- [API client](https://github.com/mrunalg141/e-commerce-/blob/main/frontend/src/services/api.js): `frontend/src/services/api.js`
- [API server](https://github.com/mrunalg141/e-commerce-/blob/main/server.js): `server.js`
- [Express app](https://github.com/mrunalg141/e-commerce-/blob/main/src/app.js): `src/app.js`
- [API routes](https://github.com/mrunalg141/e-commerce-/blob/main/src/routes/index.js): `src/routes/index.js`
- [Database connection](https://github.com/mrunalg141/e-commerce-/blob/main/src/config/database.js): `src/config/database.js`

### Security and API support

- [JWT authorization](https://github.com/mrunalg141/e-commerce-/blob/main/src/middleware/auth.js): `src/middleware/auth.js`
- [Request validation](https://github.com/mrunalg141/e-commerce-/blob/main/src/middleware/validation.js): `src/middleware/validation.js`
- [Error handling](https://github.com/mrunalg141/e-commerce-/blob/main/src/middleware/errorHandler.js): `src/middleware/errorHandler.js`
- [API documentation](https://github.com/mrunalg141/e-commerce-/blob/main/src/config/swagger.js): `src/config/swagger.js`

### Domain data

- [Commerce schemas](https://github.com/mrunalg141/e-commerce-/tree/main/models): `models`

### Other components

- **Shopper**
- **Browser**
- **Browser storage**
- **MongoDB**

## Connections

- Shopper → Browser: uses
- Browser → Storefront routes: opens
- Storefront routes → Page layout: renders
- Storefront routes → Home page: routes
- Storefront routes → Shop page: routes
- Storefront routes → Product details: routes
- Storefront routes → Cart page: routes
- Storefront routes → Account page: routes
- Home page → Product card: renders
- Shop page → Product card: renders
- Product card → Product data: reads
- Product details → Product data: reads
- Storefront routes → Cart state: provides
- Cart page → Cart state: reads and updates
- Cart state → Browser storage: persists
- Product card → Cart state: adds items
- Product details → Cart state: adds items
- Account page → API client: requests
- API client → API server: HTTP requests
- API server → Database connection: connects
- API server → Express app: starts
- Express app → API routes: mounts
- Express app → API documentation: sets up
- Express app → Error handling: registers
- Database connection → MongoDB: connects
- API routes → Commerce schemas: planned API use
- API routes → JWT authorization: planned protection
- API routes → Request validation: planned validation