# srikanthnagudu2909/chess architecture

> Architecture diagram of the GitHub repository srikanthnagudu2909/chess, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-26). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/srikanthnagudu2909/chess
- Repository: https://github.com/srikanthnagudu2909/chess

## Overview

This repository implements a browser-based multiplayer chess app: users enter through the web UI, authenticate or play as guests, find or join rooms, and play realtime games with clocks and chat. The backend handles HTTP authentication and leaderboard requests alongside Socket.IO room and game events; game results update user statistics. The excerpts show the main route, auth, and realtime paths, but omit portions of socket event handling and most page implementations, so uncertain wiring is left out.

Main entry points: [`frontend/src/App.jsx`](https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/App.jsx) (App routes), [`backend/index.js`](https://github.com/srikanthnagudu2909/chess/blob/main/backend/index.js) (HTTP and socket server), [`backend/models/user.model.js`](https://github.com/srikanthnagudu2909/chess/blob/main/backend/models/user.model.js) (User records), [`backend/routes/auth.rotues.js`](https://github.com/srikanthnagudu2909/chess/blob/main/backend/routes/auth.rotues.js) (Auth routes)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_web["Web app"]
  node_app["App routes<br/>[App.jsx]"]
  node_lobby["Lobby<br/>[Lobby.jsx]"]
  node_roomui["Game room UI<br/>[Room.jsx]"]
  node_authui["Login and signup<br/>[Login.jsx]"]
  node_profile["Profile<br/>[Profile.jsx]"]
  node_leaderboardui["Leaderboard view<br/>[Leaderboard.jsx]"]
  node_guestui["Guest entry<br/>[Guest.jsx]"]
end

subgraph group_identity["Identity"]
  node_authstate["Auth state<br/>[authSlice.js]"]
  node_apiclient["HTTP client<br/>[client.js]"]
  node_authroutes["Auth routes<br/>[auth.rotues.js]"]
  node_authcontroller["Auth controller<br/>[auth.controller.js]"]
  node_authguard["HTTP auth guard<br/>[verifyAuth.js]"]
end

subgraph group_realtime["Realtime chess"]
  node_socketclient["Socket client<br/>[socket.js]"]
  node_roomstate["Room and game state<br/>[index.js]"]
end

subgraph group_services["Backend services"]
  node_server["HTTP and socket server<br/>[index.js]"]
  node_users[("User records<br/>[user.model.js]")]
  node_leaderboardroutes["Leaderboard route"]
  node_leaderboardcontroller["Leaderboard query"]
  node_avatarupload["Avatar upload endpoint<br/>[index.js]"]
end

node_player(("Player"))
node_database[("MongoDB")]

node_player -->|"uses"| node_app
node_app -->|"checks session"| node_authstate
node_app -->|"routes to"| node_lobby
node_app -->|"routes to"| node_roomui
node_app -->|"routes to"| node_authui
node_app -->|"routes to"| node_profile
node_app -->|"routes to"| node_leaderboardui
node_app -->|"routes to"| node_guestui
node_authstate -->|"requests"| node_apiclient
node_authui -->|"dispatches"| node_authstate
node_leaderboardui -->|"requests"| node_apiclient
node_roomui -->|"emits events"| node_socketclient
node_socketclient -->|"Socket.IO events"| node_server
node_server -->|"broadcasts events"| node_socketclient
node_apiclient -->|"HTTP requests"| node_server
node_server -->|"mounts routes"| node_authroutes
node_authroutes -->|"dispatches"| node_authcontroller
node_authroutes -->|"guards fetch"| node_authguard
node_authguard -->|"loads user"| node_users
node_authcontroller -->|"reads and writes"| node_users
node_server -->|"mounts routes"| node_leaderboardroutes
node_leaderboardroutes -->|"dispatches"| node_leaderboardcontroller
node_leaderboardcontroller -->|"queries rankings"| node_users
node_server -->|"handles events"| node_roomstate
node_roomstate -->|"updates player stats"| node_users
node_server -->|"connects"| node_database
node_users -->|"persists records"| node_database
node_server -->|"serves upload"| node_avatarupload

click node_app "https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/App.jsx"
click node_lobby "https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Lobby.jsx"
click node_roomui "https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Room.jsx"
click node_authui "https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Login.jsx"
click node_profile "https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Profile.jsx"
click node_leaderboardui "https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Leaderboard.jsx"
click node_guestui "https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Guest.jsx"
click node_authstate "https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/slices/authSlice.js"
click node_apiclient "https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/api/client.js"
click node_socketclient "https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/socket.js"
click node_server "https://github.com/srikanthnagudu2909/chess/blob/main/backend/index.js"
click node_authroutes "https://github.com/srikanthnagudu2909/chess/blob/main/backend/routes/auth.rotues.js"
click node_authcontroller "https://github.com/srikanthnagudu2909/chess/blob/main/backend/controller/auth.controller.js"
click node_authguard "https://github.com/srikanthnagudu2909/chess/blob/main/backend/middleware/verifyAuth.js"
click node_users "https://github.com/srikanthnagudu2909/chess/blob/main/backend/models/user.model.js"
click node_leaderboardroutes "https://github.com/srikanthnagudu2909/chess/blob/main/backend/routes/leaderboard.routes.js"
click node_leaderboardcontroller "https://github.com/srikanthnagudu2909/chess/blob/main/backend/controller/leaderboard.controller.js"
click node_roomstate "https://github.com/srikanthnagudu2909/chess/blob/main/backend/index.js"
click node_avatarupload "https://github.com/srikanthnagudu2909/chess/blob/main/backend/index.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_lobby,node_roomui,node_authui,node_profile,node_leaderboardui,node_guestui toneBlue
class node_authstate,node_apiclient,node_authroutes,node_authcontroller,node_authguard,node_database toneAmber
class node_socketclient,node_roomstate toneMint
class node_server,node_users,node_leaderboardroutes,node_leaderboardcontroller,node_avatarupload toneRose
class node_player toneIndigo
```

## Components

### Web app

- [App routes](https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/App.jsx): `frontend/src/App.jsx`
- [Lobby](https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Lobby.jsx): `frontend/src/pages/Lobby.jsx`
- [Game room UI](https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Room.jsx): `frontend/src/pages/Room.jsx`
- [Login and signup](https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Login.jsx): `frontend/src/pages/Login.jsx`
- [Profile](https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Profile.jsx): `frontend/src/pages/Profile.jsx`
- [Leaderboard view](https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Leaderboard.jsx): `frontend/src/pages/Leaderboard.jsx`
- [Guest entry](https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/pages/Guest.jsx): `frontend/src/pages/Guest.jsx`

### Identity

- [Auth state](https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/slices/authSlice.js): `frontend/src/slices/authSlice.js`
- [HTTP client](https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/api/client.js): `frontend/src/api/client.js`
- [Auth routes](https://github.com/srikanthnagudu2909/chess/blob/main/backend/routes/auth.rotues.js): `backend/routes/auth.rotues.js`
- [Auth controller](https://github.com/srikanthnagudu2909/chess/blob/main/backend/controller/auth.controller.js): `backend/controller/auth.controller.js`
- [HTTP auth guard](https://github.com/srikanthnagudu2909/chess/blob/main/backend/middleware/verifyAuth.js): `backend/middleware/verifyAuth.js`

### Realtime chess

- [Socket client](https://github.com/srikanthnagudu2909/chess/blob/main/frontend/src/socket.js): `frontend/src/socket.js`
- [Room and game state](https://github.com/srikanthnagudu2909/chess/blob/main/backend/index.js): `backend/index.js`

### Backend services

- [HTTP and socket server](https://github.com/srikanthnagudu2909/chess/blob/main/backend/index.js): `backend/index.js`
- [User records](https://github.com/srikanthnagudu2909/chess/blob/main/backend/models/user.model.js): `backend/models/user.model.js`
- [Leaderboard route](https://github.com/srikanthnagudu2909/chess/blob/main/backend/routes/leaderboard.routes.js): `backend/routes/leaderboard.routes.js`
- [Leaderboard query](https://github.com/srikanthnagudu2909/chess/blob/main/backend/controller/leaderboard.controller.js): `backend/controller/leaderboard.controller.js`
- [Avatar upload endpoint](https://github.com/srikanthnagudu2909/chess/blob/main/backend/index.js): `backend/index.js`

### Other components

- **Player**
- **MongoDB**

## Connections

- Player → App routes: uses
- App routes → Auth state: checks session
- App routes → Lobby: routes to
- App routes → Game room UI: routes to
- App routes → Login and signup: routes to
- App routes → Profile: routes to
- App routes → Leaderboard view: routes to
- App routes → Guest entry: routes to
- Auth state → HTTP client: requests
- Login and signup → Auth state: dispatches
- Leaderboard view → HTTP client: requests
- Game room UI → Socket client: emits events
- Socket client → HTTP and socket server: Socket.IO events
- HTTP and socket server → Socket client: broadcasts events
- HTTP client → HTTP and socket server: HTTP requests
- HTTP and socket server → Auth routes: mounts routes
- Auth routes → Auth controller: dispatches
- Auth routes → HTTP auth guard: guards fetch
- HTTP auth guard → User records: loads user
- Auth controller → User records: reads and writes
- HTTP and socket server → Leaderboard route: mounts routes
- Leaderboard route → Leaderboard query: dispatches
- Leaderboard query → User records: queries rankings
- HTTP and socket server → Room and game state: handles events
- Room and game state → User records: updates player stats
- HTTP and socket server → MongoDB: connects
- User records → MongoDB: persists records
- HTTP and socket server → Avatar upload endpoint: serves upload