Deno-Code-Generator

this module ported from https://github.com/palicao/node-code-generator, by me for deno usage

Usage

import { CodeGenerator } from 'https://deno.land/[email protected]/mod.ts'
const generator = new CodeGenerator()
const pattern = 'ABC#+'
const howMany = 100
const options = {}
// Generate an array of random unique codes according to the provided pattern:
const codes = generator.generateCodes(pattern, howMany, options)

Pattern

In the pattern, the following characters are replaced:

• # with a single numeric character
• * with a single alphanumeric character (excluding ambiguous letters and numbers)
• #+ with a variable number of numeric characters (the number of characters depends on how many codes we need to generate and on the sparsity option)
• *+ with a variable number of alphanumeric characters (the number of characters depends on how many codes we need to generate and on the sparsity option)

Options

Name	Default	Description
sparsity	1	How sparse should the generated set be? The default setting generates a dense set, but probably if you are generating vouchers you want to provide an higer number to avoid consecutive (guessable) codes
existingCodesLoader	function(pattern) { return []; }	Provide a function that returns an array of previously generated codes for this pattern to avoid duplicates
alphanumericChars	123456789ABCDEFGHJKLMNPQRSTUVWXYZ	Characters that will be substituted to *
numericChars	0123456789	Characters that will be substituted to #
alphanumericRegex	/\*(?!\+)/g	Regular expression to match *
numericRegex	/#(?!\+)/g	Regular expression to match #
alphanumericMoreRegex	/\*\+/g	Regular expression to match *+
numericMoreRegex	/#\+/g	Regular expression to match #+

Extra

The library also exposes the simple randomChars(allowedChars, howMany) function to simply generate random strings (based on Math.random(), so don't use it where security matters!

Contribute

Fork -> Branch -> Pull request!

License

MIT (see LICENSE)