askirmas / react-classnaming

import type { BemInGeneral } from "./bem.types"

const {isArray: $isArray} = Array

let modDelimiter = "--"

, elementDelimiter = "__"

export type BemOptions = {

  elementDelimiter: string

  modDelimiter: string

}

export {

  bem2arr,

  setOptions

}

function bem2arr(query: BemInGeneral) {

  const $return: string[] = []

  for (const base in query) {

    const baseQ = query[base]

    $return.push(base)

    if (!baseQ)

      continue

    if (typeof baseQ !== "object") {

      if (typeof baseQ === "string")

        $return.push(`${base}${modDelimiter}${baseQ}`)

      continue

    }

    if (!$isArray(baseQ))

      $return.push(...mods2arr(base, baseQ))

    else {

      const {length} = baseQ

      for (let i = 0; i < length; i++) {

        const modQ = baseQ[i]

        if (modQ === false)

          continue

        if (modQ !== null && typeof modQ === "object")

          $return.push(...mods2arr(base, modQ))

        else

          $return.push(bmv(base, modQ))

      }

    }

  }

  return $return

}

function bmv(base: string, mod: string, value: Exclude<primitive, false> = true) {

  return `${base}${modDelimiter}${mod}${

    value === true

    ? ""

    : `${modDelimiter}${value}`

  }`

}

function setOptions({

  elementDelimiter: elD = elementDelimiter,

  modDelimiter: modDel = modDelimiter

}: Partial<BemOptions>) {

  modDelimiter = modDel

  elementDelimiter = elD

}