# sambhavbalki-codes/auth-system architecture

> Architecture diagram of the GitHub repository sambhavbalki-codes/auth-system, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-08-14). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/sambhavbalki-codes/auth-system
- Repository: https://github.com/sambhavbalki-codes/auth-system

## Overview

#### Purpose and entry points
This is a Node.js backend centered on user authentication and session management. The process entry point is `server.js`, which initializes the application exported from `src/app.js`.

#### HTTP application boundary
`src/app.js` composes the web application: middleware, route registration, and error/request handling belong at this boundary. Authentication-facing HTTP endpoints are mounted through `src/routes/auth.routes.js`, keeping transport routing separate from business handlers.

#### Authentication flow
`src/routes/auth.routes.js` maps authentication requests to `src/controllers/auth.controller.js`. The controller is the primary orchestration layer for registration, login, logout, and/or session validation: it accepts HTTP input, invokes persistence models, and emits HTTP responses.

#### Identity persistence
`src/models/user.model.js` defines the durable user identity boundary. It owns user records and credentials/profile fields used by authentication. Controllers should access user data through this model rather than embedding database operations in routes.

#### Session persistence
`src/models/session.model.js` represents authenticated session state separately from user identity. The expected control flow is: authenticate a user through `user.model`, create or look up session state through `session.model`, then return or clear session information through the auth controller.

#### Configuration and database infrastructure
`src/config/config.js` centralizes runtime configuration, likely including environment-derived application and credential settings. `src/config/database.js` establishes the database connection used by `src/models/user.model.js` and `src/models/session.model.js`. This is the key external-service boundary: the application depends on a configured persistent database.

#### Runtime structure
The runtime is JavaScript/Node.js, with dependencies and execution scripts defined in `package.json`. Startup control flows from `server.js` → `src/app.js` → route registration → controllers → models/database; response flow returns in reverse through the HTTP application layer.

Main entry points: [`src/config/database.js`](https://github.com/sambhavbalki-codes/auth-system/blob/main/src/config/database.js) (Database Connection), [`src/controllers/auth.controller.js`](https://github.com/sambhavbalki-codes/auth-system/blob/main/src/controllers/auth.controller.js) (Auth Controller), [`server.js`](https://github.com/sambhavbalki-codes/auth-system/blob/main/server.js) (Server Entry), [`src/app.js`](https://github.com/sambhavbalki-codes/auth-system/blob/main/src/app.js) (Application Composition)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_runtime["Node.js Runtime"]
  node_package["Package Scripts &amp; Dependencies<br/>Node.js package<br/>[package.json]"]
  node_server["Server Entry<br/>Node.js entry point<br/>[server.js]"]
end

subgraph group_http["HTTP Application"]
  node_app["Application Composition<br/>HTTP application<br/>[app.js]"]
  node_auth_routes["Auth Routes<br/>HTTP router<br/>[auth.routes.js]"]
end

subgraph group_identity["Authentication"]
  node_auth_controller["Auth Controller<br/>authentication orchestration<br/>[auth.controller.js]"]
end

subgraph group_persistence["Persistence"]
  node_user_model[("User Model<br/>identity model<br/>[user.model.js]")]
  node_session_model[("Session Model<br/>[session.model.js]")]
  node_config["Runtime Configuration<br/>[config.js]"]
  node_database[("Database Connection<br/>database infrastructure<br/>[database.js]")]
end

node_persistent_db[("Persistent Database<br/>external database")]

node_package -->|"runs"| node_server
node_server -->|"initializes"| node_app
node_app -->|"mounts"| node_auth_routes
node_auth_routes -->|"maps requests to"| node_auth_controller
node_auth_controller -->|"authenticates users"| node_user_model
node_auth_controller -->|"creates, validates, clears sessions"| node_session_model
node_config -->|"configures"| node_database
node_database -->|"connects to"| node_persistent_db
node_user_model -->|"uses"| node_database
node_session_model -->|"uses"| node_database

click node_package "https://github.com/sambhavbalki-codes/auth-system/blob/main/package.json"
click node_server "https://github.com/sambhavbalki-codes/auth-system/blob/main/server.js"
click node_app "https://github.com/sambhavbalki-codes/auth-system/blob/main/src/app.js"
click node_auth_routes "https://github.com/sambhavbalki-codes/auth-system/blob/main/src/routes/auth.routes.js"
click node_auth_controller "https://github.com/sambhavbalki-codes/auth-system/blob/main/src/controllers/auth.controller.js"
click node_user_model "https://github.com/sambhavbalki-codes/auth-system/blob/main/src/models/user.model.js"
click node_session_model "https://github.com/sambhavbalki-codes/auth-system/blob/main/src/models/session.model.js"
click node_config "https://github.com/sambhavbalki-codes/auth-system/blob/main/src/config/config.js"
click node_database "https://github.com/sambhavbalki-codes/auth-system/blob/main/src/config/database.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_package,node_server toneBlue
class node_app,node_auth_routes toneAmber
class node_auth_controller toneMint
class node_user_model,node_session_model,node_config,node_database toneRose
class node_persistent_db toneNeutral
```

## Components

### Node.js Runtime

- [Package Scripts & Dependencies](https://github.com/sambhavbalki-codes/auth-system/blob/main/package.json): Node.js package · Defines runtime dependencies and execution scripts. · `package.json`
- [Server Entry](https://github.com/sambhavbalki-codes/auth-system/blob/main/server.js): Node.js entry point · `server.js`

### HTTP Application

- [Application Composition](https://github.com/sambhavbalki-codes/auth-system/blob/main/src/app.js): HTTP application · Composes middleware, routes, and request/error handling. · `src/app.js`
- [Auth Routes](https://github.com/sambhavbalki-codes/auth-system/blob/main/src/routes/auth.routes.js): HTTP router · `src/routes/auth.routes.js`

### Authentication

- [Auth Controller](https://github.com/sambhavbalki-codes/auth-system/blob/main/src/controllers/auth.controller.js): authentication orchestration · Handles registration, login, logout, and session validation. · `src/controllers/auth.controller.js`

### Persistence

- [User Model](https://github.com/sambhavbalki-codes/auth-system/blob/main/src/models/user.model.js): identity model · Owns durable user records and credentials. · `src/models/user.model.js`
- [Session Model](https://github.com/sambhavbalki-codes/auth-system/blob/main/src/models/session.model.js): session model · Owns authenticated session state separately from identities. · `src/models/session.model.js`
- [Runtime Configuration](https://github.com/sambhavbalki-codes/auth-system/blob/main/src/config/config.js): configuration · Provides environment-derived application and credential settings. · `src/config/config.js`
- [Database Connection](https://github.com/sambhavbalki-codes/auth-system/blob/main/src/config/database.js): database infrastructure · Establishes the persistent database connection. · `src/config/database.js`

### Other components

- **Persistent Database**: external database

## Connections

- Package Scripts & Dependencies → Server Entry: runs
- Server Entry → Application Composition: initializes
- Application Composition → Auth Routes: mounts
- Auth Routes → Auth Controller: maps requests to
- Auth Controller → User Model: authenticates users
- Auth Controller → Session Model: creates, validates, clears sessions
- Runtime Configuration → Database Connection: configures
- Database Connection → Persistent Database: connects to
- User Model → Database Connection: uses
- Session Model → Database Connection: uses