toki-pona-names.ts

// Generates random toki pona-style names.

import { randomItem } from "./random-item.js"

const VOWELS = "aeiou"
const CONSONANTS = "jklmnpstw"
const CONSONANTS_WITHOUT_MN = "jklpstw"
const MAYBE_N = ["", "", "", "n"] as const

export function createRandomTokiPonaName(
  minSyllables: number,
  maxSyllables: number,
) {
  const syllableCount = Math.floor(
    Math.random() * (maxSyllables - minSyllables) + minSyllables,
  )

  let name = ""

  if (Math.random() < 0.5) {
    name += randomItem(VOWELS)
  }

  for (let i = 0; i < syllableCount; i++) {
    let output

    if (name.endsWith("n")) {
      output =
        randomItem(CONSONANTS_WITHOUT_MN) +
        randomItem(VOWELS) +
        randomItem(MAYBE_N)
    } else {
      output = randomItem(CONSONANTS) + randomItem(VOWELS) + randomItem(MAYBE_N)
    }

    if (
      output.includes("ji") ||
      output.includes("ti") ||
      output.includes("wo") ||
      output.includes("wu")
    ) {
      i--
      continue
    }

    name += output
  }

  return name
}

export function generateMany(
  count: number,
  minSyllables: number,
  maxSyllables: number,
) {
  return Array.from({ length: count }, () =>
    createRandomTokiPonaName(minSyllables, maxSyllables),
  )
}