@ostore/db/dist/index.cjs.map

基于文件系统的轻量级 NoSQL 数据库【Lightweight file-based NoSQL database】

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interface ICopyFileResult {\n  code: 200 | 500;\n  data?: IDocument[];\n  error?: any;\n}\n\nexport interface IReadDatabaseOptions {\n  _$id?: number;\n  [key: string]: any;\n}\n\nexport interface IDocumentData {\n  _$id: number;\n  [key: string]: any;\n}\n\nexport interface IFindResult {\n  code: 200 | 500;\n  data?: IDocumentData[];\n  count: number;\n  error?: any;\n}\n\nexport interface IWriteDatabaseResult {\n  code: 200 | 500;\n  error?: any;\n  doc?: IDocument;\n}\n\nexport interface IWriteDatabaseOptions {\n  copy?: boolean;\n}\n\nexport interface IDocument {\n  _$status: number;\n  _$id: number;\n  content: any;\n}\n\nexport interface IDBConfig {\n  base?: string;\n  model: string;\n}\n\nexport interface IQueryParams {\n  [key: string]: any;\n}\n\nexport interface IFindOptions {\n  skip?: number;\n  limit?: number;\n  sort?: number;\n}\n\nexport interface IUpdateResult {\n  code: 200 | 500;\n  status?: boolean;\n  errlist?: any[];\n  doc?: IDocument;\n  error?: any;\n}\n\n// 内部查询结果类型（未扁平化）\nexport interface IInternalFindResult {\n  code: 200 | 500;\n  data: IDocument[];\n  count: number;\n  error?: any;\n}\n\n// ==================== 常量定义 ====================\n\n// 顶层字段（不在 content 中）\nexport const TOP_LEVEL_FIELDS = ['_$id', '_$status'] as const;","import { IDocument } from './types';\n\nexport class Document implements IDocument {\n  _$status: number;\n  _$id: number;\n  content: any;\n\n  constructor(data: IDocument | any, isExisting: boolean = false) {\n    if (isExisting) {\n      // 从数据库读取的完整文档\n      this._$id = data._$id;\n      this._$status = data._$status;\n      this.content = data.content;\n    } else {\n      // 新建文档\n      this._$id = Number(process.hrtime.bigint() / 1000n);\n      this._$status = 1;\n      this.content = data;\n    }\n  }\n}","import * as fs from 'fs';\nimport * as path from 'path';\nimport { promisify } from 'util';\nimport { Document } from './Document';\nimport {\n  IDBConfig,\n  ICopyFileResult,\n  IReadDatabaseOptions,\n  IDocument,\n  IWriteDatabaseOptions,\n  IWriteDatabaseResult,\n} from './types';\n\nconst fsReadFile = promisify(fs.readFile);\nconst fsWriteFile = promisify(fs.writeFile);\nconst fsCopyFile = promisify(fs.copyFile);\nconst fsUnlink = promisify(fs.unlink);\nconst fsReaddir = promisify(fs.readdir);\n\nexport class FileHandler {\n  protected model: string;\n  protected databasePath: string;\n\n  constructor(config: IDBConfig) {\n    const rootPath = config.base || process.cwd();\n    this.model = config.model;\n    this.databasePath = path.join(rootPath, 'data', this.model);\n\n    if (!this.model) {\n      throw new Error('Model name is required');\n    }\n\n    this.initDatabase();\n  }\n\n  /**\n   * 初始化数据库目录\n   */\n  private initDatabase(): void {\n    if (!fs.existsSync(this.databasePath)) {\n      fs.mkdirSync(this.databasePath, { recursive: true });\n      console.log(`Database directory created: ${this.databasePath}`);\n    }\n  }\n\n  /**\n   * 复制文件\n   */\n  protected async copyFile(source: string, target: string): Promise<ICopyFileResult> {\n    try {\n      await fsCopyFile(source, target);\n      return { code: 200 };\n    } catch (error) {\n      return { code: 500, error };\n    }\n  }\n\n  /**\n   * 删除文件\n   */\n  protected async unlinkFile(target: string): Promise<ICopyFileResult> {\n    try {\n      await fsUnlink(target);\n      return { code: 200 };\n    } catch (error) {\n      return { code: 500, error };\n    }\n  }\n\n  /**\n   * 读取数据库文档\n   */\n  protected async readDatabase(options: IReadDatabaseOptions = {}): Promise<ICopyFileResult> {\n    try {\n      const docs: IDocument[] = [];\n\n      // 根据 _$id 读取单个文档\n      if (options._$id) {\n        const filePath = path.join(this.databasePath, `${options._$id}.json`);\n        if (!fs.existsSync(filePath)) {\n          return { code: 200, data: [] };\n        }\n        \n        const fileContent = await fsReadFile(filePath, 'utf-8');\n        const doc = JSON.parse(fileContent);\n        \n        // 只返回状态正常的文档\n        if (doc._$status === 1) {\n          docs.push(doc);\n        }\n      } else {\n        // 读取所有文档\n        const files = await fsReaddir(this.databasePath);\n        \n        for (const file of files) {\n          if (!file.endsWith('.json') || file.endsWith('_copy.json')) continue;\n          \n          const filePath = path.join(this.databasePath, file);\n          const fileContent = await fsReadFile(filePath, 'utf-8');\n          const doc = JSON.parse(fileContent);\n          \n          // 只返回状态正常的文档\n          if (doc._$status === 1) {\n            docs.push(doc);\n          }\n        }\n      }\n\n      return { code: 200, data: docs };\n    } catch (error) {\n      return { code: 500, error };\n    }\n  }\n\n  /**\n   * 写入数据库文档\n   */\n  protected async writeDatabase(\n    data: any,\n    options: IWriteDatabaseOptions = {}\n  ): Promise<IWriteDatabaseResult> {\n    try {\n      // 判断是更新还是新建\n      const isExisting = data._$id !== undefined && data._$status !== undefined;\n      const doc = new Document(data, isExisting);\n      \n      const filename = path.join(this.databasePath, `${doc._$id}.json`);\n      const filenameCopy = path.join(this.databasePath, `${doc._$id}_copy.json`);\n\n      // 如果需要备份\n      if (options.copy && fs.existsSync(filename)) {\n        const copyResult = await this.copyFile(filename, filenameCopy);\n        if (copyResult.code !== 200) {\n          return copyResult;\n        }\n      }\n\n      // 写入文件\n      await fsWriteFile(filename, JSON.stringify(doc, null, 2), 'utf-8');\n\n      // 删除备份\n      if (options.copy && fs.existsSync(filenameCopy)) {\n        await this.unlinkFile(filenameCopy);\n      }\n\n      return { code: 200, doc };\n    } catch (error) {\n      // 如果失败，恢复备份\n      if (options.copy) {\n        const isExisting = data._$id !== undefined && data._$status !== undefined;\n        const doc = new Document(data, isExisting);\n        const filename = path.join(this.databasePath, `${doc._$id}.json`);\n        const filenameCopy = path.join(this.databasePath, `${doc._$id}_copy.json`);\n        \n        if (fs.existsSync(filenameCopy)) {\n          await this.copyFile(filenameCopy, filename);\n          await this.unlinkFile(filenameCopy);\n        }\n      }\n      return { code: 500, error };\n    }\n  }\n\n  /**\n   * 批量写入数据库（并发优化）\n   */\n  protected async writeDatabaseBatch(\n    dataList: any[],\n    options: IWriteDatabaseOptions = {}\n  ): Promise<{ successCount: number; errorList: any[] }> {\n    const results = await Promise.allSettled(\n      dataList.map(data => this.writeDatabase(data, options))\n    );\n\n    const errorList = results\n      .filter((result, index) => \n        result.status === 'rejected' || \n        (result.status === 'fulfilled' && result.value.code !== 200)\n      )\n      .map((result, index) => ({\n        index,\n        error: result.status === 'rejected' ? result.reason : result.value.error\n      }));\n\n    return {\n      successCount: results.length - errorList.length,\n      errorList\n    };\n  }\n}","import { FileHandler } from './FileHandler';\nimport {\n  IDBConfig,\n  IQueryParams,\n  IDocument,\n  IFindOptions,\n  ICopyFileResult,\n  IWriteDatabaseResult,\n  IInternalFindResult,\n  IFindResult,\n  IUpdateResult,\n  TOP_LEVEL_FIELDS\n} from './types';\n\nexport class DB extends FileHandler {\n  private _id: number;\n\n  constructor(config: IDBConfig) {\n    super(config);\n    this._id = Date.now();\n  }\n\n  /**\n   * 创建文档\n   */\n  public async create(data: IQueryParams): Promise<IWriteDatabaseResult> {\n    return this.writeDatabase(data);\n  }\n\n  /**\n   * 内部查询方法（返回未扁平化的 IDocument[]）\n   */\n  private async _findInternal(\n    params: IQueryParams,\n    options: IFindOptions = {}\n  ): Promise<IInternalFindResult> {\n    const { skip = 0, limit = 10000, sort = -1 } = options;\n\n    // 过滤 undefined 值，构建查询条件\n    const query = this.buildQuery(params);\n\n    // 读取数据库\n    const result = await this.readDatabase(query);\n    if (result.code !== 200) {\n      return { code: 500, data: [], count: 0, error: result.error };\n    }\n\n    let docs = result.data || [];\n\n    // 如果有查询条件，进行过滤\n    if (Object.keys(query).length > 0) {\n      docs = docs.filter((item: IDocument) =>\n        Object.keys(query).every((key) => {\n          const queryValue = query[key];\n          const itemValue = this.getDocumentFieldValue(item, key);\n\n          // 支持函数查询\n          if (typeof queryValue === 'function') {\n            return queryValue(itemValue);\n          }\n\n          // 精确匹配\n          return queryValue === itemValue;\n        })\n      );\n    }\n\n    // 排序\n    const sortedDocs = this.sortDocuments(docs, sort);\n\n    // 分页（不再重复排序）\n    const paginatedDocs = sortedDocs.slice(skip, skip + limit);\n\n    return {\n      code: 200,\n      data: paginatedDocs,\n      count: docs.length\n    };\n  }\n\n  /**\n   * 查询文档（公开方法，保持向后兼容）\n   */\n  public async find(\n    params: IQueryParams,\n    options: IFindOptions = {}\n  ): Promise<ICopyFileResult | IFindResult> {\n    const result = await this._findInternal(params, options);\n    return result as ICopyFileResult;\n  }\n\n  /**\n   * 查询单个文档\n   */\n  public async findOne(\n    query: IQueryParams,\n    options: IFindOptions = {}\n  ): Promise<IFindResult> {\n    const result = await this._findInternal(query, options);\n    if (result.code !== 200) return { ...result, data: [] };\n\n    const firstDoc = result.data[0];\n    const data = firstDoc ? { ...firstDoc.content, _$id: firstDoc._$id } : null;\n\n    return {\n      code: 200,\n      data: data ? [data] : [],\n      count: result.count\n    };\n  }\n\n  /**\n   * 查询所有文档\n   */\n  public async findMany(\n    query: IQueryParams,\n    options: IFindOptions = {}\n  ): Promise<IFindResult> {\n    const result = await this._findInternal(query, options);\n    if (result.code !== 200) return { ...result, data: [] };\n\n    const data = result.data.map((item: IDocument) => ({\n      ...item.content,\n      _$id: item._$id\n    }));\n\n    return {\n      code: 200,\n      data,\n      count: result.count\n    };\n  }\n\n  /**\n   * 更新单个文档\n   * @param target - 更新的数据\n   * @param source - 查询条件（可选，默认使用 target）\n   */\n  public async updateOne(\n    target: IQueryParams,\n    source?: IQueryParams\n  ): Promise<IUpdateResult> {\n    // 深拷贝避免修改原对象\n    const updateData = { ...target };\n    let queryCondition: IQueryParams;\n    \n    // 确定查询条件\n    if (source) {\n      queryCondition = { ...source };\n    } else {\n      // 当 source 为空时，必须包含 _$id\n      if (!target._$id) {\n        return { \n          code: 500, \n          error: 'updateOne requires _$id in target when source is not provided' \n        };\n      }\n      queryCondition = { _$id: target._$id };\n      delete updateData._$id;\n    }\n\n    // 查询文档\n    let result: IInternalFindResult;\n    if (queryCondition._$id) {\n      const readResult = await this.readDatabase({ _$id: queryCondition._$id });\n      result = {\n        code: readResult.code,\n        data: readResult.data || [],\n        count: readResult.data?.length || 0,\n        error: readResult.error\n      };\n    } else {\n      result = await this._findInternal(queryCondition, {});\n    }\n\n    if (result.code !== 200) return { code: 500, error: result.error };\n\n    const item = result.data[0];\n    if (!item) {\n      return { code: 500, error: 'Document not found' };\n    }\n\n    // 合并更新内容\n    item.content = { ...item.content, ...updateData };\n\n    return this.writeDatabase(item, { copy: true });\n  }\n\n  /**\n   * 批量更新文档\n   * @param target - 更新的数据\n   * @param source - 查询条件（可选，默认使用 target）\n   */\n  public async updateMany(\n    target: IQueryParams,\n    source?: IQueryParams\n  ): Promise<IUpdateResult> {\n    // 深拷贝避免修改原对象\n    const updateData = { ...target };\n    const queryCondition = source || { ...target };\n\n    // 智能过滤：只删除值相同的查询字段\n    if (source) {\n      Object.keys(source).forEach(key => {\n        if (updateData[key] === source[key]) {\n          delete updateData[key];\n        }\n      });\n    }\n\n    const result = await this._findInternal(queryCondition, {});\n    if (result.code !== 200) return { code: 500, error: result.error };\n\n    if (result.data.length === 0) {\n      return { code: 500, error: 'No documents found' };\n    }\n\n    // 准备批量更新数据\n    const updatedDocs = result.data.map((item: IDocument) => ({\n      ...item,\n      content: { ...item.content, ...updateData }\n    }));\n\n    // 并发批量更新\n    const batchResult = await this.writeDatabaseBatch(updatedDocs, { copy: true });\n\n    return {\n      code: 200,\n      status: batchResult.errorList.length === 0,\n      errlist: batchResult.errorList\n    };\n  }\n\n  /**\n   * 删除单个文档（软删除）\n   */\n  public async removeOne(\n    query: IQueryParams,\n    options: IFindOptions = {}\n  ): Promise<IUpdateResult> {\n    // 深拷贝避免修改原对象\n    const queryCondition = { ...query };\n\n    // 查询文档\n    let result: IInternalFindResult;\n    if (queryCondition._$id) {\n      const readResult = await this.readDatabase({ _$id: queryCondition._$id });\n      result = {\n        code: readResult.code,\n        data: readResult.data || [],\n        count: readResult.data?.length || 0,\n        error: readResult.error\n      };\n    } else {\n      result = await this._findInternal(queryCondition, options);\n    }\n\n    if (result.code !== 200) return { code: 500, error: result.error };\n\n    const item = result.data[0];\n    if (!item) {\n      return { code: 500, error: 'Document not found' };\n    }\n\n    // 软删除：设置状态为 0\n    item._$status = 0;\n\n    return this.writeDatabase(item, { copy: true });\n  }\n\n  /**\n   * 批量删除文档（软删除）\n   */\n  public async removeMany(query: IQueryParams): Promise<IUpdateResult> {\n    const result = await this._findInternal(query);\n    if (result.code !== 200) return { code: 500, error: result.error };\n\n    if (result.data.length === 0) {\n      return { code: 500, error: 'No documents found' };\n    }\n\n    // 准备批量删除数据\n    const deletedDocs = result.data.map((item: IDocument) => ({\n      ...item,\n      _$status: 0\n    }));\n\n    // 并发批量删除\n    const batchResult = await this.writeDatabaseBatch(deletedDocs, { copy: true });\n\n    return {\n      code: 200,\n      status: batchResult.errorList.length === 0,\n      errlist: batchResult.errorList\n    };\n  }\n\n  // ==================== 私有辅助方法 ====================\n\n  /**\n   * 获取文档字段值（兼容顶层字段和 content 字段）\n   */\n  private getDocumentFieldValue(doc: IDocument, key: string): any {\n    // 使用常量判断顶层字段\n    if (TOP_LEVEL_FIELDS.includes(key as any)) {\n      return doc[key as keyof IDocument];\n    }\n    // 其他字段在 content 中\n    return doc.content[key];\n  }\n\n  /**\n   * 构建查询条件（过滤 undefined 值）\n   */\n  private buildQuery(params: IQueryParams): IQueryParams {\n    return Object.keys(params).reduce((query: IQueryParams, key) => {\n      if (params[key] !== undefined) {\n        query[key] = params[key];\n      }\n      return query;\n    }, {});\n  }\n\n  /**\n   * 文档排序\n   */\n  private sortDocuments(docs: IDocument[], sort: number): IDocument[] {\n    return [...docs].sort((a, b) =>\n      sort > 0 ? a._$id - b._$id : b._$id - a._$id\n    );\n  }\n}"]}