number-name/src/common/index.ts

export type Scale = 'europeanLong' | 'long' | 'short'

export interface ConvertOptions {
  scale?: Scale
}

export interface StreamOptions {
  encoding?: BufferEncoding
}

type NumberDigit = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

type StringDigit = '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9'

export type Digit = NumberDigit | StringDigit

export type ReadStreamOptions = ConvertOptions & StreamOptions

export type GetKiloCount = (hundreds: Digit, tens: Digit, ones: Digit) => string
export type GetKiloName = (thousandPower: bigint) => string
export type JoinKilo = (kiloCount: string, kiloName?: string) => string

export interface NumberSystem {
  getKiloCount: GetKiloCount
  getKiloName: {
    short?: GetKiloName
    long?: GetKiloName
    europeanLong?: GetKiloName
  }
  joinKilo: JoinKilo
}

interface DigitString {
  [0]: string
  [1]: string
  [2]: string
  [3]: string
  [4]: string
  [5]: string
  [6]: string
  [7]: string
  [8]: string
  [9]: string
  ['0']: string
  ['1']: string
  ['2']: string
  ['3']: string
  ['4']: string
  ['5']: string
  ['6']: string
  ['7']: string
  ['8']: string
  ['9']: string
}

export interface NumberSystemNameTable {
  units: DigitString
  tenPlus: DigitString
  tenTimes: DigitString
  hundred: string
  thousand: string
  kiloSpecialUnits: DigitString
  kiloUnits: DigitString
  kiloTens: DigitString
  kiloHundreds: DigitString
  kiloThousand: string
  kiloEvenSuffix: string
  kiloOddSuffix: string
  and: string
}