# anuragbiradar2305/npm-package-diff architecture

> Architecture diagram of the GitHub repository anuragbiradar2305/npm-package-diff, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-26). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/anuragbiradar2305/npm-package-diff
- Repository: https://github.com/anuragbiradar2305/npm-package-diff

## Overview

Get Package Diff is a small Express API that accepts a package name and two versions, validates their order, retrieves NPM metadata, compares the versions’ dependencies, and returns available GitHub release details and a comparison link. The runtime is implemented in server.js; the tree shows no separate service modules. The GitHub comparison link is constructed locally, while release details are fetched from GitHub. The graph reflects these documented capabilities and the sampled route implementation.

Main entry points: [`server.js`](https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js) (GET /diff)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_api["API"]
  node_route["GET /diff<br/>[server.js]"]
  node_version_check["Version validation<br/>[server.js]"]
  node_response["Diff response<br/>[server.js]"]
end

subgraph group_comparison["Package comparison"]
  node_metadata["Metadata fetch<br/>[server.js]"]
  node_dependency_compare["Dependency comparison<br/>[server.js]"]
end

subgraph group_github["GitHub details"]
  node_release_fetch["Release lookup<br/>[server.js]"]
  node_compare_link["Compare link builder<br/>[server.js]"]
end

node_client(("API client"))
node_npm[("NPM registry")]
node_github[("GitHub API")]

node_client -->|"requests diff"| node_route
node_route -->|"validates versions"| node_version_check
node_route -->|"fetches package"| node_metadata
node_metadata -->|"requests metadata"| node_npm
node_metadata -->|"returns metadata"| node_route
node_route -->|"compares dependencies"| node_dependency_compare
node_route -->|"fetches releases"| node_release_fetch
node_release_fetch -->|"requests releases"| node_github
node_route -->|"builds comparison link"| node_compare_link
node_route -->|"assembles result"| node_response
node_response -->|"returns JSON"| node_client

click node_route "https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js"
click node_version_check "https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js"
click node_metadata "https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js"
click node_dependency_compare "https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js"
click node_release_fetch "https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js"
click node_compare_link "https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js"
click node_response "https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.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_route,node_version_check,node_response,node_client toneBlue
class node_metadata,node_dependency_compare,node_npm,node_github toneAmber
class node_release_fetch,node_compare_link toneMint
```

## Components

### API

- [GET /diff](https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js): `server.js`
- [Version validation](https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js): `server.js`
- [Diff response](https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js): `server.js`

### Package comparison

- [Metadata fetch](https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js): `server.js`
- [Dependency comparison](https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js): `server.js`

### GitHub details

- [Release lookup](https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js): `server.js`
- [Compare link builder](https://github.com/anuragbiradar2305/npm-package-diff/blob/main/server.js): `server.js`

### Other components

- **API client**
- **NPM registry**
- **GitHub API**

## Connections

- API client → GET /diff: requests diff
- GET /diff → Version validation: validates versions
- GET /diff → Metadata fetch: fetches package
- Metadata fetch → NPM registry: requests metadata
- Metadata fetch → GET /diff: returns metadata
- GET /diff → Dependency comparison: compares dependencies
- GET /diff → Release lookup: fetches releases
- Release lookup → GitHub API: requests releases
- GET /diff → Compare link builder: builds comparison link
- GET /diff → Diff response: assembles result
- Diff response → API client: returns JSON