export default {
  computeFileSize(fileSize) {
    if (!fileSize) {
      return '-'
    }
    let size = ''
    if (fileSize < 0.1 * 1024) {
      size = fileSize.toFixed(2) + 'B'
    } else if (fileSize < 0.1 * 1024 * 1024) {
      size = (fileSize / 1024).toFixed(2) + 'KB'
    } else if (fileSize < 0.1 * 1024 * 1024 * 1024) {
      size = (fileSize / (1024 * 1024)).toFixed(2) + 'MB'
    } else {
      size = (fileSize / (1024 * 1024 * 1024)).toFixed(2) + 'GB'
    }
    let sizeStr = size + ''
    let index = sizeStr.indexOf('.')
    let dou = sizeStr.substr(index + 1, 2)
    if (dou == '00') {
      return sizeStr.substring(0, index) + sizeStr.substr(index + 3, 2)
    }
    return size
  },
}