# vahapgencdal/auth_test_api architecture

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

## Overview

This small Next.js application exposes a token-checking API alongside a generated starter homepage. The main runtime path is an API request through CORS middleware to the connect handler, which calls the token validator and returns a JSON response. The validator decodes the token payload and checks issuer and scope against environment configuration. The handler’s destructuring expects a `decodedPayload` property, although the validator returns the payload directly on success; this graph shows the implemented call and response path, not a guarantee of successful output. The README describes the Next.js starter, and no additional product capabilities are documented.

Main entry points: [`pages/api/connect.ts`](https://github.com/vahapgencdal/auth_test_api/blob/main/pages/api/connect.ts) (Connect endpoint), [`utils/auth.ts`](https://github.com/vahapgencdal/auth_test_api/blob/main/utils/auth.ts) (Token validation), [`middleware.js`](https://github.com/vahapgencdal/auth_test_api/blob/main/middleware.js) (API CORS), [`pages/index.tsx`](https://github.com/vahapgencdal/auth_test_api/blob/main/pages/index.tsx) (Starter homepage)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_web["Web UI"]
  node_home["Starter homepage<br/>[index.tsx]"]
  node_app["App wrapper<br/>[_app.tsx]"]
end

subgraph group_api["API and Auth"]
  node_connect["Connect endpoint<br/>[connect.ts]"]
  node_auth["Token validation<br/>[auth.ts]"]
end

subgraph group_middleware["Request Middleware"]
  node_cors["API CORS<br/>[middleware.js]"]
end

node_user(("Site visitor"))
node_api_client(("API caller"))

node_user -->|"opens page"| node_home
node_app -->|"renders page"| node_home
node_api_client -->|"sends API request"| node_cors
node_cors -->|"continues request"| node_connect
node_connect -->|"validates token"| node_auth
node_auth -->|"returns payload"| node_connect
node_connect -->|"returns JSON"| node_api_client

click node_home "https://github.com/vahapgencdal/auth_test_api/blob/main/pages/index.tsx"
click node_app "https://github.com/vahapgencdal/auth_test_api/blob/main/pages/_app.tsx"
click node_cors "https://github.com/vahapgencdal/auth_test_api/blob/main/middleware.js"
click node_connect "https://github.com/vahapgencdal/auth_test_api/blob/main/pages/api/connect.ts"
click node_auth "https://github.com/vahapgencdal/auth_test_api/blob/main/utils/auth.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_home,node_app toneBlue
class node_connect,node_auth toneAmber
class node_cors,node_api_client toneMint
class node_user toneIndigo
```

## Components

### Web UI

- [Starter homepage](https://github.com/vahapgencdal/auth_test_api/blob/main/pages/index.tsx): `pages/index.tsx`
- [App wrapper](https://github.com/vahapgencdal/auth_test_api/blob/main/pages/_app.tsx): `pages/_app.tsx`

### API and Auth

- [Connect endpoint](https://github.com/vahapgencdal/auth_test_api/blob/main/pages/api/connect.ts): `pages/api/connect.ts`
- [Token validation](https://github.com/vahapgencdal/auth_test_api/blob/main/utils/auth.ts): `utils/auth.ts`

### Request Middleware

- [API CORS](https://github.com/vahapgencdal/auth_test_api/blob/main/middleware.js): `middleware.js`

### Other components

- **Site visitor**
- **API caller**

## Connections

- Site visitor → Starter homepage: opens page
- App wrapper → Starter homepage: renders page
- API caller → API CORS: sends API request
- API CORS → Connect endpoint: continues request
- Connect endpoint → Token validation: validates token
- Token validation → Connect endpoint: returns payload
- Connect endpoint → API caller: returns JSON