export function bytesToSize (bytes) {
  const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB']
  if (bytes === 0) return 'n/a'
  const i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)))
  if (i === 0) return bytes + ' ' + sizes[i]
  return (bytes / Math.pow(1024, i)).toFixed(1) + ' ' + sizes[i]
}

export function vaildData (key, defaultValue = Boolean) {
  if (key) {
    return true
  } else {
    return defaultValue
  }
}

export function objectToParams (objs) {
  const query = []
  for (const k in objs) {
    query.push(k + '=' + objs[k])
  }
  return query.join('&')
}