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/deno-code-generator@v1.0.4/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)