npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

dln

v0.1.3

Published

Generates and validates driving license numbers (DLNs)

Downloads

82

Readme

dln

Generates and validates driving license numbers (DLNs). Presently, only licenses issued by the UK DVLA are supported. Please open an issue if you'd like to see support added for another type of license - I'd be keen to work with you to enable this.

import DLN from 'dln';

const user1 = {
	familyName: 'Morgan',
	personalName: 'Sarah Meredyth',
	birthDate: '1964-07-05',
	sex: 'F',
};

const user2 = {
	familyName: 'Gardner',
	personalName: 'Charles',
	birthDate: '1969-05-10',
	sex: 'M',
};

const finalChars = '9IJ';
const completeDLN = 'MORGA657054SM9IJ';

console.log(DLN.generate(user1)); // => MORGA657054SM
console.log(DLN.generate(user1, finalChars)); // => MORGA657054SM9IJ
console.log(DLN.generate(user2)); // => GARDN605109C9
console.log(DLN.validate(completeDLN)); // => true
console.log(DLN.validate(completeDLN, user1)); // => true
console.log(DLN.validate(completeDLN, user2)); // => false

Installation

$ npm install dln

API

DLN.generate(userDetails[, finalCharacters])

Generates a DLN based on the given user details, optionally adding the final characters to the end (as these characters cannot be generated accurately).

If the final characters are not provided, the output will not be a complete DLN and will fail validation in the DLN.validate function.

Returns a string either 13 or 16 characters in length, depending on whether the final characters are provided.

Throws if the user details or final characters are invalid.

DLN.validate(dln[, userDetails])

Verifies that a complete DLN is valid, optionally checking that the first 13 characters of the DLN are correct for the given user details.

Returns a boolean indicating whether the DLN is valid.

Throws if the user details are invalid.

Notes

The user details information, when provided, must be exactly as specified below:

{
	familyName: 'von Neumann', // required, string - can contain spaces
	personalName: 'John', // optional, string - first names, including middle names
	birthDate: '1969-05-10', // required, string - YYYY-MM-DD date
	sex: 'M', // required, string, (M|F) - whatever the person has stated to the DVLA
}

DLNs follow a relatively strict format, and are exactly 16 characters in length. Only the first 13 characters of a DLN can be accurately generated - the remaining 3 characters cannot and must be provided separately.

The final characters also follow a strict format, and are exactly 3 characters in length. These are typically appended to the generated part of the DLN in order to form a complete & valid DLN.

Support

Please open an issue on this repository.

Authors

License

MIT licensed - see LICENSE file