Divide a text in parts, to be handle by Polly API

polly_parts.js

const someReallyUsefullFunction = (text) => {
  
  ...
  
  // Break in parts small enough to be handle by Polly API
  const parts = divideTextEnoughToBeHandleByPolly(text)
  
  ...
  
}

const divideTextEnoughToBeHandleByPolly = (text, charSeparator = '<br/>', maxLenght = 1000) => {
  return text.split(charSeparator).reduce((memo, p) => {
    if(memo[memo.length - 1].length < maxLenght) {
      memo[memo.length - 1] += charSeparator + p
      return memo
    }
    else {
      memo[memo.length] = p
      return memo
    }
  }, [[]])
}