# obcsidian/securechat-app architecture

> Architecture diagram of the GitHub repository obcsidian/securechat-app, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-14). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/obcsidian/securechat-app
- Repository: https://github.com/obcsidian/securechat-app

## Overview

This is a browser-based real-time room chat application. A user chooses or generates a room ID, joins with a username, sends messages, and sees room membership updates. The browser communicates with the server over WebSocket; the server routes events through a room manager to in-memory room state and broadcasts updates. The server also hosts the browser interface. Although the package description calls the product end-to-end security based, the sampled runtime shows no encryption or other security mechanism, so that capability cannot be represented as implemented. The README is empty; relationships below are limited to the shown source.

Main entry points: [`src/Client/Client.ts`](https://github.com/obcsidian/securechat-app/blob/main/src/Client/Client.ts) (Chat interface), [`src/Server.ts`](https://github.com/obcsidian/securechat-app/blob/main/src/Server.ts) (HTTP hosting), [`src/Server/RoomManager.ts`](https://github.com/obcsidian/securechat-app/blob/main/src/Server/RoomManager.ts) (Room manager), [`src/Server/Room.ts`](https://github.com/obcsidian/securechat-app/blob/main/src/Server/Room.ts) (Room state)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_client["Browser client"]
  node_chat_ui["Chat interface<br/>[Client.ts]"]
  node_page["Chat page<br/>[index.html]"]
  node_styles["Page styles<br/>[style.css]"]
end

subgraph group_server["Web server"]
  node_http_host["HTTP hosting<br/>[Server.ts]"]
  node_ws_gateway["WebSocket gateway<br/>[Server.ts]"]
end

subgraph group_rooms["Room management"]
  node_room_manager["Room manager<br/>[RoomManager.ts]"]
  node_room_state[("Room state<br/>[Room.ts]")]
end

node_user(("Chat user"))

node_user -->|"uses"| node_chat_ui
node_chat_ui -->|"sends events"| node_ws_gateway
node_ws_gateway -->|"sends updates"| node_chat_ui
node_http_host -->|"serves page"| node_page
node_http_host -->|"serves assets"| node_styles
node_http_host -->|"transpiles and serves"| node_chat_ui
node_ws_gateway -->|"routes room events"| node_room_manager
node_room_manager -->|"manages clients"| node_room_state
node_room_manager -->|"broadcasts through"| node_room_state

click node_chat_ui "https://github.com/obcsidian/securechat-app/blob/main/src/Client/Client.ts"
click node_page "https://github.com/obcsidian/securechat-app/blob/main/src/Client/index.html"
click node_styles "https://github.com/obcsidian/securechat-app/blob/main/src/Client/style.css"
click node_http_host "https://github.com/obcsidian/securechat-app/blob/main/src/Server.ts"
click node_ws_gateway "https://github.com/obcsidian/securechat-app/blob/main/src/Server.ts"
click node_room_manager "https://github.com/obcsidian/securechat-app/blob/main/src/Server/RoomManager.ts"
click node_room_state "https://github.com/obcsidian/securechat-app/blob/main/src/Server/Room.ts"

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_chat_ui,node_page,node_styles,node_user toneBlue
class node_http_host,node_ws_gateway toneAmber
class node_room_manager,node_room_state toneMint
```

## Components

### Browser client

- [Chat interface](https://github.com/obcsidian/securechat-app/blob/main/src/Client/Client.ts): `src/Client/Client.ts`
- [Chat page](https://github.com/obcsidian/securechat-app/blob/main/src/Client/index.html): `src/Client/index.html`
- [Page styles](https://github.com/obcsidian/securechat-app/blob/main/src/Client/style.css): `src/Client/style.css`

### Web server

- [HTTP hosting](https://github.com/obcsidian/securechat-app/blob/main/src/Server.ts): `src/Server.ts`
- [WebSocket gateway](https://github.com/obcsidian/securechat-app/blob/main/src/Server.ts): `src/Server.ts`

### Room management

- [Room manager](https://github.com/obcsidian/securechat-app/blob/main/src/Server/RoomManager.ts): `src/Server/RoomManager.ts`
- [Room state](https://github.com/obcsidian/securechat-app/blob/main/src/Server/Room.ts): `src/Server/Room.ts`

### Other components

- **Chat user**

## Connections

- Chat user → Chat interface: uses
- Chat interface → WebSocket gateway: sends events (evidence: `src/Client/Client.ts`)
- WebSocket gateway → Chat interface: sends updates (evidence: `src/Server.ts`)
- HTTP hosting → Chat page: serves page (evidence: `src/Server.ts`)
- HTTP hosting → Page styles: serves assets (evidence: `src/Server.ts`)
- HTTP hosting → Chat interface: transpiles and serves (evidence: `src/Server.ts`)
- WebSocket gateway → Room manager: routes room events (evidence: `src/Server.ts`)
- Room manager → Room state: manages clients (evidence: `src/Server/RoomManager.ts`)
- Room manager → Room state: broadcasts through (evidence: `src/Server/RoomManager.ts`)