# mubix-dev/flipo-mern-social-media-app architecture

> Architecture diagram of the GitHub repository mubix-dev/flipo-mern-social-media-app, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-06-26). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/mubix-dev/flipo-mern-social-media-app
- Repository: https://github.com/mubix-dev/flipo-mern-social-media-app

## Overview

1. **Overall shape**
   Flipo is a two-tier MERN application: a **React/Vite frontend** and a **Node.js/Express backend** backed by **MongoDB/Mongoose**. The backend also hosts the real-time layer with **Socket.io**, so HTTP and websocket traffic meet in the same server boundary.

2. **Backend entry point and integration boundary**
   `backend/index.js` is the central composition point. It likely wires together Express middleware, route registration, MongoDB connection, and Socket.io setup. This is the main boundary where request/response APIs, authentication, uploads, and live events converge.

3. **Domain-oriented backend modules**
   The backend is split by feature rather than by technical layer: `auth`, `user`, `post`, `story`, `flip`, and `message`. Each feature has a route file and a controller file, which keeps routing thin and pushes business logic into controllers.

4. **Persistence model**
   MongoDB collections are modeled with Mongoose schemas for `user`, `post`, `story`, `flip`, `message`, `conversation`, `notification`, and `tempUser`. This suggests the app stores both core social objects and supporting workflow state like pending signup verification or notification records.

5. **Media and upload pipeline**
   Media handling is a first-class subsystem. `config/multer.js` handles multipart upload intake, `config/cloudinary.js` suggests media is pushed to **Cloudinary**, and the post/story/flip flows likely persist only metadata and URLs in MongoDB. This creates a clear split between binary media storage and application data storage.

6. **Authentication and verification flow**
   Authentication is JWT-based, with `config/token.js` and `middlewares/isAuth.js` protecting private routes. The presence of `VerifyEmail` and `ForgotPassword` pages, plus `tempUser`, `mail.js`, and `auth.controller.js`, indicates a staged onboarding flow: sign up → email verification → account activation → token-based access.

7. **Real-time communication layer**
   `backend/socket.js` and the Socket.io dependency support live updates for chat and social interactions. The most likely real-time use cases are message delivery, online user presence, notifications, and interactive actions like likes or comments on media content.

8. **Frontend state and data-fetching architecture**
   The frontend uses **Redux Toolkit** as a client cache and coordination layer. Each major domain has its own slice: `user`, `post`, `story`, `flip`, `message`, and `socket`. Custom hooks such as `getAllPosts`, `getALLStories`, `getALLFlips`, and `getAllNotifiactions` appear to fetch data and hydrate Redux, reducing repeated API calls.

9. **UI composition**
   `src/pages` contains route-level screens like Home, Profile, ChatPage, Upload, Search, NotificationsPage, and the auth screens. `src/components` holds reusable view pieces like feeds, post cards, story UI, chat bubbles, nav, and online-user widgets. This shows a clear separation between page orchestration and presentational components.

10. **Primary user flows**
   The main flows are:
   - **Content feed**: Home/Feed loads posts, stories, flips, and suggested users.
   - **Publishing**: Upload routes media and creates content records.
   - **Messaging**: ChatPage and message slices manage conversations and live chat.
   - **Profile/social graph**: follow relationships, user discovery, and profile editing.
   - **Notifications**: stored notifications plus websocket-driven updates.

11. **Networking and client/server contract**
   The frontend uses HTTP APIs for standard CRUD and Socket.io for live synchronization. The repo structure implies Axios-based requests wrapped by hooks, with Redux used to normalize and cache server responses before rendering.

12. **Deployment and environment boundaries**
   The backend is containerized with a dedicated `Dockerfile` and runs as a Docker service in deployment. The frontend is built with Vite and is configured for Vercel hosting. External services materially shaping the architecture are **MongoDB Atlas**, **Cloudinary**, **Brevo/SMTP email**, and **Socket.io** for live events.

13. **Architectural summary for diagramming**
   A good diagram would show:
   - Browser client built in React/Vite
   - Redux-managed UI state on the client
   - Express API server as the main backend
   - MongoDB as system of record
   - Cloudinary as media storage
   - SMTP service for account emails
   - Socket.io channel alongside HTTP for realtime messaging/notifications
   - Feature-specific backend modules feeding those shared infrastructure services

Main entry points: [`backend/config`](https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/backend/config) (Config), [`frontend/src/App.jsx`](https://github.com/mubix-dev/flipo-mern-social-media-app/blob/main/frontend/src/App.jsx) (App shell), [`backend/controllers`](https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/backend/controllers) (Controllers), [`backend/routes`](https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/backend/routes) (Routes)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_frontend["Frontend"]
  node_frontend_app["App shell<br/>React app<br/>[App.jsx]"]
  node_frontend_pages["Pages<br/>route views"]
  node_frontend_components["Components"]
  node_frontend_hooks["Data hooks<br/>fetch hooks"]
  node_frontend_store["Redux store<br/>state slices<br/>[store.js]"]
end

subgraph group_backend["Backend"]
  node_backend_entry["Server entry<br/>express bootstrap<br/>[index.js]"]
  node_backend_routes["Routes"]
  node_backend_controllers["Controllers<br/>business logic"]
  node_backend_middleware["Auth guard<br/>middleware<br/>[isAuth.js]"]
  node_backend_config["Config<br/>integrations"]
  node_backend_models[("Models<br/>mongoose schemas")]
  node_backend_socket(("Realtime<br/>socket server<br/>[socket.js]"))
end

subgraph group_external["External"]
  node_external_mongo[("MongoDB<br/>database")]
  node_external_cloudinary[("Cloudinary<br/>media storage")]
  node_external_mail["Email service<br/>smtp/brevo"]
  node_external_socketio(("Socket.io<br/>realtime transport"))
end

node_frontend_app -->|"renders"| node_frontend_pages
node_frontend_app -->|"uses"| node_frontend_components
node_frontend_app -->|"loads data"| node_frontend_hooks
node_frontend_app -->|"reads/writes"| node_frontend_store
node_frontend_hooks -->|"HTTP API"| node_backend_routes
node_frontend_store -.->|"syncs"| node_backend_socket
node_backend_entry -->|"mounts"| node_backend_routes
node_backend_entry -->|"wires"| node_backend_config
node_backend_entry -->|"attaches"| node_backend_socket
node_backend_routes -->|"protects"| node_backend_middleware
node_backend_routes -->|"delegates"| node_backend_controllers
node_backend_controllers -->|"persists"| node_backend_models
node_backend_config -->|"connects"| node_external_mongo
node_backend_config -->|"uploads"| node_external_cloudinary
node_backend_config -->|"sends mail"| node_external_mail
node_backend_socket -->|"uses"| node_external_socketio
node_backend_models -->|"maps to"| node_external_mongo
node_backend_controllers -.->|"uses"| node_backend_config
node_backend_controllers -.->|"emit events"| node_backend_socket

click node_frontend_app "https://github.com/mubix-dev/flipo-mern-social-media-app/blob/main/frontend/src/App.jsx"
click node_frontend_pages "https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/frontend/src/pages"
click node_frontend_components "https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/frontend/src/components"
click node_frontend_hooks "https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/frontend/src/hooks"
click node_frontend_store "https://github.com/mubix-dev/flipo-mern-social-media-app/blob/main/frontend/src/redux/store.js"
click node_backend_entry "https://github.com/mubix-dev/flipo-mern-social-media-app/blob/main/backend/index.js"
click node_backend_routes "https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/backend/routes"
click node_backend_controllers "https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/backend/controllers"
click node_backend_middleware "https://github.com/mubix-dev/flipo-mern-social-media-app/blob/main/backend/middlewares/isAuth.js"
click node_backend_config "https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/backend/config"
click node_backend_models "https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/backend/models"
click node_backend_socket "https://github.com/mubix-dev/flipo-mern-social-media-app/blob/main/backend/socket.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_frontend_app,node_frontend_pages,node_frontend_components,node_frontend_hooks,node_frontend_store toneBlue
class node_backend_entry,node_backend_routes,node_backend_controllers,node_backend_middleware,node_backend_config,node_backend_models,node_backend_socket toneAmber
class node_external_mongo,node_external_cloudinary,node_external_mail,node_external_socketio toneMint
```

## Components

### Frontend

React/Vite client with UI, data hooks, and Redux state.

- [App shell](https://github.com/mubix-dev/flipo-mern-social-media-app/blob/main/frontend/src/App.jsx): React app · Top-level client composition and routing entry. · `frontend/src/App.jsx`
- [Pages](https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/frontend/src/pages): route views · Screen-level views for feed, profile, chat, auth, and uploads. · `frontend/src/pages`
- [Components](https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/frontend/src/components): ui components · Reusable feed, post, story, chat, and nav UI pieces. · `frontend/src/components`
- [Data hooks](https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/frontend/src/hooks): fetch hooks · Client-side loaders that pull server data into the UI. · `frontend/src/hooks`
- [Redux store](https://github.com/mubix-dev/flipo-mern-social-media-app/blob/main/frontend/src/redux/store.js): state slices · Central client state for users, content, messages, stories, flips, and sockets. · `frontend/src/redux/store.js`

### Backend

Express API server with domain modules, persistence, and realtime.

- [Server entry](https://github.com/mubix-dev/flipo-mern-social-media-app/blob/main/backend/index.js): express bootstrap · Main composition point for HTTP, middleware, database, and realtime setup. · `backend/index.js`
- [Routes](https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/backend/routes): api routes · Feature route boundaries for auth, users, posts, stories, flips, and messages. · `backend/routes`
- [Controllers](https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/backend/controllers): business logic · Feature controllers that implement request handling and domain behavior. · `backend/controllers`
- [Auth guard](https://github.com/mubix-dev/flipo-mern-social-media-app/blob/main/backend/middlewares/isAuth.js): middleware · JWT-protected route middleware. · `backend/middlewares/isAuth.js`
- [Config](https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/backend/config): integrations · Database, token, mail, upload, and media service wiring. · `backend/config`
- [Models](https://github.com/mubix-dev/flipo-mern-social-media-app/tree/main/backend/models): mongoose schemas · Persistence models for users, social content, conversations, notifications, and staging state. · `backend/models`
- [Realtime](https://github.com/mubix-dev/flipo-mern-social-media-app/blob/main/backend/socket.js): socket server · Socket.io event layer for chat and live updates. · `backend/socket.js`

### External

Third-party infrastructure used by the app.

- **MongoDB**: database · System of record for app entities and workflows.
- **Cloudinary**: media storage · External storage for uploaded media assets.
- **Email service**: smtp/brevo · Outbound mail for verification and password recovery.
- **Socket.io**: realtime transport · Websocket transport used alongside HTTP.

## Connections

- App shell → Pages: renders · App composes route-level screens.
- App shell → Components: uses · App and pages reuse shared UI parts.
- App shell → Data hooks: loads data · Client screens hydrate from custom fetch hooks.
- App shell → Redux store: reads/writes · UI state is coordinated through Redux slices.
- Data hooks → Routes: HTTP API · Hooks call the server's REST endpoints.
- Redux store → Realtime: syncs · Client socket state mirrors realtime events.
- Server entry → Routes: mounts · Server registers feature route modules.
- Server entry → Config: wires · Server initializes shared infrastructure settings.
- Server entry → Realtime: attaches · HTTP server is paired with realtime events.
- Routes → Auth guard: protects · Private routes pass through auth checks.
- Routes → Controllers: delegates · Routes keep transport thin and forward to controllers.
- Controllers → Models: persists · Controllers read and write application data.
- Config → MongoDB: connects · Database connection is established here.
- Config → Cloudinary: uploads · Media assets are stored externally.
- Config → Email service: sends mail · Verification and recovery emails are dispatched here.
- Realtime → Socket.io: uses · Realtime messaging is implemented with Socket.io.
- Models → MongoDB: maps to · Mongoose schemas represent MongoDB collections.
- Controllers → Config: uses · Controllers rely on token, upload, and mail helpers.
- Controllers → Realtime: emit events · Domain actions can broadcast live updates.