askirmas / postcss-d-ts

import type { SchemaWithDefaultsAndExamples, DefaultsAndExamplesFromSchema } from "./ts-swiss.types"

const {keys: $keys} = Object

, {random: $random} = Math

export {

  regexpize,

  extractDefaults,

  randomString

}

function regexpize(source: string|RegExp, flags = "") {

  return typeof source === "string"

  ? new RegExp(source, flags)

  : source

}

function extractDefaults<S extends SchemaWithDefaultsAndExamples>({properties}: S) {

  const keys: Array<keyof typeof properties> = $keys(properties)

  , {length} = keys

  , defaults: Partial<DefaultsAndExamplesFromSchema<S>> = {}

  for (let i = length; i--; ) {

    const key = keys[i]

    //@ts-ignore

    defaults[key] = properties[key].default

  }

  return defaults as DefaultsAndExamplesFromSchema<S>

}

function randomString() {

  return $random().toString(36).substr(2)

}