import path from 'path'

// totaly awesome hash function. Do not use this for encryption (crypto.subtle.digest etc would be overkill for this)
export function hash (array) {
  const string = JSON.stringify(array)
  if (!string.length) throw new Error('TypeError: Unexpected data to calculate hash from')

  let hash = 0
  let char

  for (let i = 0; i < string.length; i++) {
    char = string.charCodeAt(i)
    hash = ((hash << 5) - hash) + char
    hash |= 0
  }

  return new Uint32Array([hash]).toString()
}

export function isJSFile (name) {
  const extname = path.extname(name)
  return extname === '.js'
}