# theaviansh-dev/express-typescript architecture

> Architecture diagram of the GitHub repository theaviansh-dev/express-typescript, 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/theaviansh-dev/express-typescript
- Repository: https://github.com/theaviansh-dev/express-typescript

## Overview

This is a sample Express/TypeScript backend. Requests pass through app middleware to the root handler or mounted API routes; API handlers list MongoDB collections or accept uploaded files. Startup connects the database and mounts routes before listening, while shutdown closes the database and listener. The README also advertises Zod validation, but no validation implementation appears in the supplied tree or excerpts, so it is not mapped.

Main entry points: [`src/server.ts`](https://github.com/theaviansh-dev/express-typescript/blob/main/src/server.ts) (Server lifecycle), [`src/Machine/app.ts`](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Machine/app.ts) (Express app), [`src/Machine/Trigger.ts`](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Machine/Trigger.ts) (HTTP listener), [`src/Machine/dbConn.ts`](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Machine/dbConn.ts) (Database connection)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_runtime["Server runtime"]
  node_server["Server lifecycle<br/>[server.ts]"]
  node_app["Express app<br/>[app.ts]"]
  node_listener["HTTP listener<br/>[Trigger.ts]"]
  node_env["Environment settings<br/>[ENV.ts]"]
end

subgraph group_middleware["HTTP middleware"]
  node_cors["CORS policy<br/>[CORS.ts]"]
  node_helmet["Security headers<br/>[HelmetConfig.ts]"]
end

subgraph group_api["API handling"]
  node_root["Root response<br/>[RootRoute.ts]"]
  node_api_route["API routes<br/>[apiRoute.ts]"]
  node_controller["API controller<br/>[ApiController.ts]"]
  node_not_found["Not found handler<br/>[NOT_FOUND.ts]"]
  node_upload_config["Upload configuration<br/>[MulterClass.ts]"]
end

subgraph group_integrations["External resources"]
  node_db_connection["Database connection<br/>[dbConn.ts]"]
  node_mongo[("MongoDB")]
  node_upload_disk["Upload directory"]
end

node_client(("HTTP client"))

node_client -->|"sends requests"| node_app
node_server -->|"connects"| node_db_connection
node_db_connection -->|"connects"| node_mongo
node_db_connection -->|"returns database"| node_server
node_server -->|"creates routes"| node_api_route
node_server -->|"mounts routes"| node_app
node_server -->|"mounts fallback"| node_not_found
node_server -->|"starts listener"| node_listener
node_server -->|"closes database"| node_db_connection
node_server -->|"stops listener"| node_listener
node_listener -->|"listens with"| node_app
node_listener -->|"reads port"| node_env
node_app -->|"uses policy"| node_cors
node_app -->|"uses headers"| node_helmet
node_app -->|"dispatches root"| node_root
node_api_route -->|"dispatches handlers"| node_controller
node_api_route -->|"configures upload"| node_upload_config
node_controller -->|"lists collections"| node_mongo
node_upload_config -->|"writes files"| node_upload_disk

click node_server "https://github.com/theaviansh-dev/express-typescript/blob/main/src/server.ts"
click node_app "https://github.com/theaviansh-dev/express-typescript/blob/main/src/Machine/app.ts"
click node_listener "https://github.com/theaviansh-dev/express-typescript/blob/main/src/Machine/Trigger.ts"
click node_env "https://github.com/theaviansh-dev/express-typescript/blob/main/src/Machine/ENV.ts"
click node_cors "https://github.com/theaviansh-dev/express-typescript/blob/main/src/Config/CORS.ts"
click node_helmet "https://github.com/theaviansh-dev/express-typescript/blob/main/src/Config/HelmetConfig.ts"
click node_root "https://github.com/theaviansh-dev/express-typescript/blob/main/src/Config/RootRoute.ts"
click node_api_route "https://github.com/theaviansh-dev/express-typescript/blob/main/src/routes/apiRoute.ts"
click node_controller "https://github.com/theaviansh-dev/express-typescript/blob/main/src/Controller/ApiController.ts"
click node_not_found "https://github.com/theaviansh-dev/express-typescript/blob/main/src/Config/NOT_FOUND.ts"
click node_upload_config "https://github.com/theaviansh-dev/express-typescript/blob/main/src/Config/MulterClass.ts"
click node_db_connection "https://github.com/theaviansh-dev/express-typescript/blob/main/src/Machine/dbConn.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_server,node_app,node_listener,node_env,node_client toneBlue
class node_cors,node_helmet toneAmber
class node_root,node_api_route,node_controller,node_not_found,node_upload_config toneMint
class node_db_connection,node_mongo,node_upload_disk toneRose
```

## Components

### Server runtime

- [Server lifecycle](https://github.com/theaviansh-dev/express-typescript/blob/main/src/server.ts): `src/server.ts`
- [Express app](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Machine/app.ts): `src/Machine/app.ts`
- [HTTP listener](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Machine/Trigger.ts): `src/Machine/Trigger.ts`
- [Environment settings](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Machine/ENV.ts): `src/Machine/ENV.ts`

### HTTP middleware

- [CORS policy](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Config/CORS.ts): `src/Config/CORS.ts`
- [Security headers](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Config/HelmetConfig.ts): `src/Config/HelmetConfig.ts`

### API handling

- [Root response](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Config/RootRoute.ts): `src/Config/RootRoute.ts`
- [API routes](https://github.com/theaviansh-dev/express-typescript/blob/main/src/routes/apiRoute.ts): `src/routes/apiRoute.ts`
- [API controller](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Controller/ApiController.ts): `src/Controller/ApiController.ts`
- [Not found handler](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Config/NOT_FOUND.ts): `src/Config/NOT_FOUND.ts`
- [Upload configuration](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Config/MulterClass.ts): `src/Config/MulterClass.ts`

### External resources

- [Database connection](https://github.com/theaviansh-dev/express-typescript/blob/main/src/Machine/dbConn.ts): `src/Machine/dbConn.ts`
- **MongoDB**
- **Upload directory**

### Other components

- **HTTP client**

## Connections

- HTTP client → Express app: sends requests
- Server lifecycle → Database connection: connects
- Database connection → MongoDB: connects
- Database connection → Server lifecycle: returns database
- Server lifecycle → API routes: creates routes
- Server lifecycle → Express app: mounts routes
- Server lifecycle → Not found handler: mounts fallback
- Server lifecycle → HTTP listener: starts listener
- Server lifecycle → Database connection: closes database
- Server lifecycle → HTTP listener: stops listener
- HTTP listener → Express app: listens with
- HTTP listener → Environment settings: reads port
- Express app → CORS policy: uses policy
- Express app → Security headers: uses headers
- Express app → Root response: dispatches root
- API routes → API controller: dispatches handlers
- API routes → Upload configuration: configures upload
- API controller → MongoDB: lists collections
- Upload configuration → Upload directory: writes files