# rizwansheik666/live_chat_app architecture

> Architecture diagram of the GitHub repository rizwansheik666/live_chat_app, 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/rizwansheik666/live_chat_app
- Repository: https://github.com/rizwansheik666/live_chat_app

## Overview

Talky is a MERN chat application: users register or log in, choose a profile avatar, select another registered user, and exchange messages in a chat. The HTTP path handles authentication, contact lookup, avatar updates, and message history/persistence; a separate Socket.io path dispatches live messages to connected recipients. The tree and README establish the broader UI and real-time capabilities, but excerpts do not show every page or the message model implementation, so uncertain internal wiring is omitted.

Main entry points: [`public/src/utils/APIRoutes.js`](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/utils/APIRoutes.js) (API endpoints), [`public/src/App.js`](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/App.js) (Route shell), [`server/index.js`](https://github.com/rizwansheik666/live_chat_app/blob/main/server/index.js) (Express server), [`public/src/components/ChatContainer.jsx`](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/components/ChatContainer.jsx) (Conversation UI)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_client["React client"]
  node_app["Route shell<br/>[App.js]"]
  node_register["Registration<br/>[Register.jsx]"]
  node_login["Login<br/>[Login.jsx]"]
  node_avatar["Avatar selection<br/>[SetAvatar.jsx]"]
  node_chatpage["Chat page<br/>[Chat.jsx]"]
  node_contacts["Contacts list<br/>[Contacts.jsx]"]
  node_chatui["Conversation UI<br/>[ChatContainer.jsx]"]
  node_chatinput["Message input<br/>[ChatInput.jsx]"]
  node_apiroutes["API endpoints<br/>[APIRoutes.js]"]
end

subgraph group_http["HTTP API"]
  node_express["Express server<br/>[index.js]"]
  node_authroutes["Auth routes<br/>[auth.js]"]
  node_messageroutes["Message routes<br/>[messages.js]"]
  node_userlogic["User operations<br/>[userController.js]"]
  node_messagelogic["Message operations"]
end

subgraph group_realtime["Live messaging"]
  node_socketserver["Socket dispatch<br/>[index.js]"]
end

subgraph group_storage["Persistent data"]
  node_userdoc["User model<br/>[userModel.js]"]
  node_messagedoc["Message model<br/>[messageModel.js]"]
  node_mongo[("MongoDB")]
end

node_user(("Chat user"))

node_user -->|"uses"| node_app
node_app -->|"routes to"| node_register
node_app -->|"routes to"| node_login
node_app -->|"routes to"| node_avatar
node_app -->|"routes to"| node_chatpage
node_register -->|"posts registration"| node_apiroutes
node_login -->|"requests login"| node_apiroutes
node_avatar -->|"sets avatar"| node_apiroutes
node_chatpage -->|"shows contacts"| node_contacts
node_chatpage -->|"opens conversation"| node_chatui
node_chatinput -->|"submits text"| node_chatui
node_contacts -->|"loads users"| node_apiroutes
node_chatui -->|"loads and saves"| node_apiroutes
node_apiroutes -->|"HTTP requests"| node_express
node_express -->|"mounts routes"| node_authroutes
node_express -->|"mounts routes"| node_messageroutes
node_authroutes -->|"dispatches"| node_userlogic
node_messageroutes -->|"dispatches"| node_messagelogic
node_userlogic -->|"queries and updates"| node_userdoc
node_messagelogic -->|"reads and writes"| node_messagedoc
node_express -->|"connects"| node_mongo
node_socketserver -->|"emits live message"| node_user
node_chatui -->|"sends and receives"| node_socketserver
node_userdoc -->|"persists users"| node_mongo
node_messagedoc -->|"persists messages"| node_mongo

click node_app "https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/App.js"
click node_register "https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/pages/Register.jsx"
click node_login "https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/pages/Login.jsx"
click node_avatar "https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/components/SetAvatar.jsx"
click node_chatpage "https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/pages/Chat.jsx"
click node_contacts "https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/components/Contacts.jsx"
click node_chatui "https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/components/ChatContainer.jsx"
click node_chatinput "https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/components/ChatInput.jsx"
click node_apiroutes "https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/utils/APIRoutes.js"
click node_express "https://github.com/rizwansheik666/live_chat_app/blob/main/server/index.js"
click node_authroutes "https://github.com/rizwansheik666/live_chat_app/blob/main/server/routes/auth.js"
click node_messageroutes "https://github.com/rizwansheik666/live_chat_app/blob/main/server/routes/messages.js"
click node_userlogic "https://github.com/rizwansheik666/live_chat_app/blob/main/server/controllers/userController.js"
click node_messagelogic "https://github.com/rizwansheik666/live_chat_app/blob/main/server/controllers/messageController.js"
click node_socketserver "https://github.com/rizwansheik666/live_chat_app/blob/main/server/index.js"
click node_userdoc "https://github.com/rizwansheik666/live_chat_app/blob/main/server/models/userModel.js"
click node_messagedoc "https://github.com/rizwansheik666/live_chat_app/blob/main/server/models/messageModel.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_register,node_login,node_avatar,node_chatpage,node_contacts,node_chatui,node_chatinput,node_apiroutes,node_user toneBlue
class node_express,node_authroutes,node_messageroutes,node_userlogic,node_messagelogic toneAmber
class node_socketserver toneMint
class node_userdoc,node_messagedoc,node_mongo toneRose
```

## Components

### React client

- [Route shell](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/App.js): `public/src/App.js`
- [Registration](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/pages/Register.jsx): `public/src/pages/Register.jsx`
- [Login](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/pages/Login.jsx): `public/src/pages/Login.jsx`
- [Avatar selection](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/components/SetAvatar.jsx): `public/src/components/SetAvatar.jsx`
- [Chat page](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/pages/Chat.jsx): `public/src/pages/Chat.jsx`
- [Contacts list](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/components/Contacts.jsx): `public/src/components/Contacts.jsx`
- [Conversation UI](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/components/ChatContainer.jsx): `public/src/components/ChatContainer.jsx`
- [Message input](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/components/ChatInput.jsx): `public/src/components/ChatInput.jsx`
- [API endpoints](https://github.com/rizwansheik666/live_chat_app/blob/main/public/src/utils/APIRoutes.js): `public/src/utils/APIRoutes.js`

### HTTP API

- [Express server](https://github.com/rizwansheik666/live_chat_app/blob/main/server/index.js): `server/index.js`
- [Auth routes](https://github.com/rizwansheik666/live_chat_app/blob/main/server/routes/auth.js): `server/routes/auth.js`
- [Message routes](https://github.com/rizwansheik666/live_chat_app/blob/main/server/routes/messages.js): `server/routes/messages.js`
- [User operations](https://github.com/rizwansheik666/live_chat_app/blob/main/server/controllers/userController.js): `server/controllers/userController.js`
- [Message operations](https://github.com/rizwansheik666/live_chat_app/blob/main/server/controllers/messageController.js): `server/controllers/messageController.js`

### Live messaging

- [Socket dispatch](https://github.com/rizwansheik666/live_chat_app/blob/main/server/index.js): `server/index.js`

### Persistent data

- [User model](https://github.com/rizwansheik666/live_chat_app/blob/main/server/models/userModel.js): `server/models/userModel.js`
- [Message model](https://github.com/rizwansheik666/live_chat_app/blob/main/server/models/messageModel.js): `server/models/messageModel.js`
- **MongoDB**

### Other components

- **Chat user**

## Connections

- Chat user → Route shell: uses
- Route shell → Registration: routes to
- Route shell → Login: routes to
- Route shell → Avatar selection: routes to
- Route shell → Chat page: routes to
- Registration → API endpoints: posts registration
- Login → API endpoints: requests login
- Avatar selection → API endpoints: sets avatar
- Chat page → Contacts list: shows contacts
- Chat page → Conversation UI: opens conversation
- Message input → Conversation UI: submits text
- Contacts list → API endpoints: loads users
- Conversation UI → API endpoints: loads and saves
- API endpoints → Express server: HTTP requests
- Express server → Auth routes: mounts routes
- Express server → Message routes: mounts routes
- Auth routes → User operations: dispatches
- Message routes → Message operations: dispatches
- User operations → User model: queries and updates
- Message operations → Message model: reads and writes
- Express server → MongoDB: connects
- Socket dispatch → Chat user: emits live message
- Conversation UI → Socket dispatch: sends and receives
- User model → MongoDB: persists users
- Message model → MongoDB: persists messages