Class ImageInfoFetchTask

src/fork/module/Image/ImageInfoFetchTask.ts:6–226

import path from 'path'

export class ImageInfoFetchTask implements TaskItem {
  /**
   * 本地图片路径
   */
  path = ''
  /**
   * 文件大小
   */
  size: number = 0
  /**
   * 格式化后的文件大小字符串
   */
  sizeFormatted: string = ''
  /**
   * 图片宽度
   */
  width: number = 0
  /**
   * 图片高度
   */
  height: number = 0
  /**
   * 图片格式 jpeg png gif webp等
   */
  ext = ''
  /**
   * 文件状态
   */
  hasError: boolean = false
  /**
   * 错误信息
   */
  errorMessage: string = ''

  constructor(path: string) {
    this.path = path
  }

  /**
   * 格式化文件大小
   */
  private formatFileSize(bytes: number): string {
    if (bytes === 0) return '0 B'

    const units = ['B', 'KB', 'MB', 'GB', 'TB']
    const k = 1024
    const i = Math.floor(Math.log(bytes) / Math.log(k))

    return `${parseFloat((bytes / Math.pow(k, i)).toFixed(2))} ${units[i]}`
  }

  /**
   * 检查文件是否存在且可读
   */
  private async checkFileAccessibility(): Promise<boolean> {
    try {
      await fs.access(this.path, fs.constants.R_OK)
      return true