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<a name='L278'></a><a href='#L278'>278</a></td><td class="line-coverage quiet"><span class="cline-any cline-no">&nbsp;</span>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js"><span class="cstat-no" title="statement not covered" >/**<span class="fstat-no" title="function not covered" ><span class="branch-0 cbranch-no" title="branch not covered" ></span></span></span>
 * 统一存储服务
 * 支持 OSS 和本地存储的无缝切换
 */
&nbsp;
import { ossService } from './oss.service';
import path from 'path';
import fs from 'fs';
import { v4 as uuidv4 } from 'uuid';
&nbsp;
export type StorageType = 'oss' | 'local';
&nbsp;
<span class="cstat-no" title="statement not covered" >class StorageService {</span>
<span class="cstat-no" title="statement not covered" >  private storageType: StorageType;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  constructor() {</span>
    // 从环境变量读取存储类型，默认 local
<span class="cstat-no" title="statement not covered" >    this.storageType = (process.env.STORAGE_TYPE as StorageType) || 'local';</span>
<span class="cstat-no" title="statement not covered" >    console.log(`[Storage] 当前存储模式: ${this.storageType}`);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 切换存储类型
   */
<span class="cstat-no" title="statement not covered" >  setStorageType(type: StorageType) {</span>
<span class="cstat-no" title="statement not covered" >    this.storageType = type;</span>
<span class="cstat-no" title="statement not covered" >    console.log(`[Storage] 存储模式已切换为: ${type}`);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 获取当前存储类型
   */
<span class="cstat-no" title="statement not covered" >  getStorageType(): StorageType {</span>
<span class="cstat-no" title="statement not covered" >    return this.storageType;</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 上传音频文件
   * @param localPath 本地文件路径
   * @param audioId 音频 ID
   * @returns 文件 URL
   */
<span class="cstat-no" title="statement not covered" >  async uploadAudio(localPath: string, audioId: string): Promise&lt;string&gt; {</span>
<span class="cstat-no" title="statement not covered" >    if (this.storageType === 'oss') {</span>
<span class="cstat-no" title="statement not covered" >      return await ossService.uploadAudio(localPath, audioId);</span>
<span class="cstat-no" title="statement not covered" >    } else {</span>
<span class="cstat-no" title="statement not covered" >      return this.uploadToLocal(localPath, 'audio', audioId);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 上传视频文件
   * @param localPath 本地文件路径
   * @param videoId 视频 ID
   * @returns 文件 URL
   */
<span class="cstat-no" title="statement not covered" >  async uploadVideo(localPath: string, videoId: string): Promise&lt;string&gt; {</span>
<span class="cstat-no" title="statement not covered" >    if (this.storageType === 'oss') {</span>
<span class="cstat-no" title="statement not covered" >      return await ossService.uploadVideo(localPath, videoId);</span>
<span class="cstat-no" title="statement not covered" >    } else {</span>
<span class="cstat-no" title="statement not covered" >      return this.uploadToLocal(localPath, 'video', videoId);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 上传封面图片
   * @param localPath 本地文件路径
   * @param bookId 书籍 ID
   * @returns 文件 URL
   */
<span class="cstat-no" title="statement not covered" >  async uploadCover(localPath: string, bookId: string | number): Promise&lt;string&gt; {</span>
<span class="cstat-no" title="statement not covered" >    if (this.storageType === 'oss') {</span>
<span class="cstat-no" title="statement not covered" >      return await ossService.uploadCover(localPath, bookId);</span>
<span class="cstat-no" title="statement not covered" >    } else {</span>
<span class="cstat-no" title="statement not covered" >      return this.uploadToLocal(localPath, 'cover', String(bookId));</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 上传通用文件
   * @param localPath 本地文件路径
   * @param category 分类（audio/video/cover/material）
   * @param id ID
   * @returns 文件 URL
   */
<span class="cstat-no" title="statement not covered" >  async uploadFile(localPath: string, category: string, id: string): Promise&lt;string&gt; {</span>
<span class="cstat-no" title="statement not covered" >    if (this.storageType === 'oss') {</span>
<span class="cstat-no" title="statement not covered" >      const objectKey = `${category}/${id}/${path.basename(localPath)}`;</span>
<span class="cstat-no" title="statement not covered" >      return await ossService.uploadFile(localPath, objectKey);</span>
<span class="cstat-no" title="statement not covered" >    } else {</span>
<span class="cstat-no" title="statement not covered" >      return this.uploadToLocal(localPath, category, id);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 上传 Buffer
   * @param buffer 文件 Buffer
   * @param objectKey 对象键
   * @param contentType 内容类型
   * @returns 文件 URL
   */
<span class="cstat-no" title="statement not covered" >  async uploadBuffer(buffer: Buffer, objectKey: string, contentType?: string): Promise&lt;string&gt; {</span>
<span class="cstat-no" title="statement not covered" >    if (this.storageType === 'oss') {</span>
<span class="cstat-no" title="statement not covered" >      return await ossService.uploadBuffer(buffer, objectKey, contentType);</span>
<span class="cstat-no" title="statement not covered" >    } else {</span>
      // 本地存储：保存到 uploads 目录
<span class="cstat-no" title="statement not covered" >      const filePath = path.join(process.cwd(), 'uploads', objectKey);</span>
<span class="cstat-no" title="statement not covered" >      const dir = path.dirname(filePath);</span>
      
<span class="cstat-no" title="statement not covered" >      if (!fs.existsSync(dir)) {</span>
<span class="cstat-no" title="statement not covered" >        fs.mkdirSync(dir, { recursive: true });</span>
<span class="cstat-no" title="statement not covered" >      }</span>
      
<span class="cstat-no" title="statement not covered" >      fs.writeFileSync(filePath, buffer);</span>
<span class="cstat-no" title="statement not covered" >      return `/uploads/${objectKey}`;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 删除文件
   * @param url 文件 URL 或路径
   */
<span class="cstat-no" title="statement not covered" >  async deleteFile(url: string): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    if (this.storageType === 'oss') {</span>
      // 从 URL 提取 objectKey
<span class="cstat-no" title="statement not covered" >      const objectKey = this.extractObjectKey(url);</span>
<span class="cstat-no" title="statement not covered" >      if (objectKey) {</span>
<span class="cstat-no" title="statement not covered" >        await ossService.deleteFile(objectKey);</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    } else {</span>
      // 本地存储：删除文件
<span class="cstat-no" title="statement not covered" >      const filePath = this.urlToLocalPath(url);</span>
<span class="cstat-no" title="statement not covered" >      if (fs.existsSync(filePath)) {</span>
<span class="cstat-no" title="statement not covered" >        fs.unlinkSync(filePath);</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 删除整个目录
   * @param prefix 目录前缀或分类
   * @param id ID
   */
<span class="cstat-no" title="statement not covered" >  async deleteDirectory(prefix: string, id: string): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    if (this.storageType === 'oss') {</span>
<span class="cstat-no" title="statement not covered" >      await ossService.deleteDirectory(`${prefix}/${id}`);</span>
<span class="cstat-no" title="statement not covered" >    } else {</span>
<span class="cstat-no" title="statement not covered" >      const dirPath = path.join(process.cwd(), 'uploads', prefix, id);</span>
<span class="cstat-no" title="statement not covered" >      if (fs.existsSync(dirPath)) {</span>
<span class="cstat-no" title="statement not covered" >        fs.rmSync(dirPath, { recursive: true, force: true });</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 下载文件（用于音频下载功能）
   * @param url 文件 URL
   * @returns 文件 Buffer
   */
<span class="cstat-no" title="statement not covered" >  async downloadFile(url: string): Promise&lt;Buffer&gt; {</span>
<span class="cstat-no" title="statement not covered" >    if (this.storageType === 'oss') {</span>
      // OSS：从 OSS 下载
<span class="cstat-no" title="statement not covered" >      const objectKey = this.extractObjectKey(url);</span>
<span class="cstat-no" title="statement not covered" >      if (!objectKey) {</span>
<span class="cstat-no" title="statement not covered" >        throw new Error('无效的 OSS URL');</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >      return await ossService.downloadFile(objectKey);</span>
<span class="cstat-no" title="statement not covered" >    } else {</span>
      // 本地存储：读取本地文件
<span class="cstat-no" title="statement not covered" >      const filePath = this.urlToLocalPath(url);</span>
<span class="cstat-no" title="statement not covered" >      if (!fs.existsSync(filePath)) {</span>
<span class="cstat-no" title="statement not covered" >        throw new Error('文件不存在');</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >      return fs.readFileSync(filePath);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 获取签名 URL（仅 OSS 支持）
   * @param url 文件 URL
   * @param expires 过期时间（秒）
   * @returns 签名 URL
   */
<span class="cstat-no" title="statement not covered" >  async getSignedUrl(url: string, expires: number = 3600): Promise&lt;string&gt; {</span>
<span class="cstat-no" title="statement not covered" >    if (this.storageType === 'oss') {</span>
<span class="cstat-no" title="statement not covered" >      const objectKey = this.extractObjectKey(url);</span>
<span class="cstat-no" title="statement not covered" >      if (objectKey) {</span>
<span class="cstat-no" title="statement not covered" >        return await ossService.getSignedUrl(objectKey, expires);</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
    // 本地存储直接返回原 URL
<span class="cstat-no" title="statement not covered" >    return url;</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 本地存储：上传文件
   */
<span class="cstat-no" title="statement not covered" >  private uploadToLocal(localPath: string, category: string, id: string): string {</span>
<span class="cstat-no" title="statement not covered" >    const uploadDir = path.join(process.cwd(), 'uploads', category, id);</span>
    
    // 确保目录存在
<span class="cstat-no" title="statement not covered" >    if (!fs.existsSync(uploadDir)) {</span>
<span class="cstat-no" title="statement not covered" >      fs.mkdirSync(uploadDir, { recursive: true });</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
    // 复制文件
<span class="cstat-no" title="statement not covered" >    const filename = path.basename(localPath);</span>
<span class="cstat-no" title="statement not covered" >    const destPath = path.join(uploadDir, filename);</span>
<span class="cstat-no" title="statement not covered" >    fs.copyFileSync(localPath, destPath);</span>
&nbsp;
    // 返回访问 URL
<span class="cstat-no" title="statement not covered" >    return `/uploads/${category}/${id}/${filename}`;</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 从 URL 提取 objectKey
   */
<span class="cstat-no" title="statement not covered" >  private extractObjectKey(url: string): string | null {</span>
<span class="cstat-no" title="statement not covered" >    if (!url) return null;</span>
    
    // OSS URL 格式: https://bucket.endpoint/objectKey
<span class="cstat-no" title="statement not covered" >    if (url.includes('aliyuncs.com') || url.includes('oss-')) {</span>
<span class="cstat-no" title="statement not covered" >      try {</span>
<span class="cstat-no" title="statement not covered" >        const urlObj = new URL(url);</span>
<span class="cstat-no" title="statement not covered" >        return urlObj.pathname.substring(1); // 去掉开头的 /</span>
<span class="cstat-no" title="statement not covered" >      } catch {</span>
<span class="cstat-no" title="statement not covered" >        return null;</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
    
    // 本地 URL 格式: /uploads/category/id/filename
<span class="cstat-no" title="statement not covered" >    if (url.startsWith('/uploads/')) {</span>
<span class="cstat-no" title="statement not covered" >      return url.substring('/uploads/'.length);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
    
<span class="cstat-no" title="statement not covered" >    return null;</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * URL 转本地路径
   */
<span class="cstat-no" title="statement not covered" >  private urlToLocalPath(url: string): string {</span>
<span class="cstat-no" title="statement not covered" >    if (url.startsWith('/uploads/')) {</span>
<span class="cstat-no" title="statement not covered" >      return path.join(process.cwd(), 'uploads', url.substring('/uploads/'.length));</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >    return url;</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 测试存储连接
   */
<span class="cstat-no" title="statement not covered" >  async testConnection(): Promise&lt;boolean&gt; {</span>
<span class="cstat-no" title="statement not covered" >    if (this.storageType === 'oss') {</span>
<span class="cstat-no" title="statement not covered" >      return await ossService.testConnection();</span>
<span class="cstat-no" title="statement not covered" >    } else {</span>
      // 测试本地存储
<span class="cstat-no" title="statement not covered" >      const testDir = path.join(process.cwd(), 'uploads');</span>
<span class="cstat-no" title="statement not covered" >      try {</span>
<span class="cstat-no" title="statement not covered" >        if (!fs.existsSync(testDir)) {</span>
<span class="cstat-no" title="statement not covered" >          fs.mkdirSync(testDir, { recursive: true });</span>
<span class="cstat-no" title="statement not covered" >        }</span>
<span class="cstat-no" title="statement not covered" >        const testFile = path.join(testDir, '.test');</span>
<span class="cstat-no" title="statement not covered" >        fs.writeFileSync(testFile, 'test');</span>
<span class="cstat-no" title="statement not covered" >        fs.unlinkSync(testFile);</span>
<span class="cstat-no" title="statement not covered" >        console.log('[Storage] 本地存储测试成功');</span>
<span class="cstat-no" title="statement not covered" >        return true;</span>
<span class="cstat-no" title="statement not covered" >      } catch (error) {</span>
<span class="cstat-no" title="statement not covered" >        console.error('[Storage] 本地存储测试失败:', error);</span>
<span class="cstat-no" title="statement not covered" >        return false;</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
// 导出单例
<span class="cstat-no" title="statement not covered" >export const storageService = new StorageService();</span>
<span class="cstat-no" title="statement not covered" >export default storageService;</span>
&nbsp;</pre></td></tr></table></pre>

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