@strapi/data-transfer/dist/file/providers/source/index.mjs.map

Data transfer capabilities for Strapi

{"version":3,"file":"index.mjs","sources":["../../../../src/file/providers/source/index.ts"],"sourcesContent":["import type { Stats } from 'node:fs';\nimport type { Readable } from 'stream';\n\nimport zip from 'zlib';\nimport path from 'path';\nimport { pipeline, PassThrough } from 'stream';\nimport fs from 'fs-extra';\nimport { Parser, type ReadEntry } from 'tar';\nimport { isEmpty, keyBy } from 'lodash/fp';\nimport { chain } from 'stream-chain';\nimport { parser } from 'stream-json/jsonl/Parser';\nimport type { Struct } from '@strapi/types';\n\nimport type { IAsset, IMetadata, ISourceProvider, ProviderType, IFile } from '../../../../types';\nimport type { IDiagnosticReporter } from '../../../utils/diagnostic';\n\nimport * as utils from '../../../utils';\nimport { write } from '../../../utils/writable-async-write';\nimport { ProviderInitializationError, ProviderTransferError } from '../../../errors/providers';\nimport { isFilePathInDirname, isPathEquivalent, unknownPathToPosix } from './utils';\n\ntype StreamItemArray = Parameters<typeof chain>[0];\n\n/**\n * Constant for the metadata file path\n */\nconst METADATA_FILE_PATH = 'metadata.json';\n\n/**\n * Provider options\n */\nexport interface ILocalFileSourceProviderOptions {\n  file: {\n    path: string; // the file to load\n  };\n\n  encryption: {\n    enabled: boolean; // if the file is encrypted (and should be decrypted)\n    key?: string; // the key to decrypt the file\n  };\n\n  compression: {\n    enabled: boolean; // if the file is compressed (and should be decompressed)\n  };\n}\n\nexport const createLocalFileSourceProvider = (options: ILocalFileSourceProviderOptions) => {\n  return new LocalFileSourceProvider(options);\n};\n\nclass LocalFileSourceProvider implements ISourceProvider {\n  type: ProviderType = 'source';\n\n  name = 'source::local-file';\n\n  options: ILocalFileSourceProviderOptions;\n\n  #metadata?: IMetadata;\n\n  #diagnostics?: IDiagnosticReporter;\n\n  constructor(options: ILocalFileSourceProviderOptions) {\n    this.options = options;\n\n    const { encryption } = this.options;\n\n    if (encryption.enabled && encryption.key === undefined) {\n      throw new Error('Missing encryption key');\n    }\n  }\n\n  #reportInfo(message: string) {\n    this.#diagnostics?.report({\n      details: {\n        createdAt: new Date(),\n        message,\n        origin: 'file-source-provider',\n      },\n      kind: 'info',\n    });\n  }\n\n  /**\n   * tar `Parser` invokes the pipeline completion callback when the archive ends, but it does not\n   * reliably await async `onReadEntry` — defer `end` until outstanding async entry work is done.\n   */\n  #endPassThroughWhenTarIdle(\n    outStream: PassThrough,\n    activeAsyncEntries: () => number,\n    err?: Error | null\n  ) {\n    if (err) {\n      outStream.destroy(err);\n      return;\n    }\n    const tick = () => {\n      if (activeAsyncEntries() === 0) {\n        outStream.end();\n      } else {\n        setImmediate(tick);\n      }\n    };\n    tick();\n  }\n\n  /**\n   * Pre flight checks regarding the provided options, making sure that the file can be opened (decrypted, decompressed), etc.\n   */\n  async bootstrap(diagnostics: IDiagnosticReporter) {\n    this.#diagnostics = diagnostics;\n    const { path: filePath } = this.options.file;\n\n    try {\n      // Read the metadata to ensure the file can be parsed\n      await this.#loadMetadata();\n      // TODO: we might also need to read the schema.jsonl files & implements a custom stream-check\n    } catch (e) {\n      if (this.options?.encryption?.enabled) {\n        throw new ProviderInitializationError(\n          `Key is incorrect or the file '${filePath}' is not a valid Strapi data file.`\n        );\n      }\n      throw new ProviderInitializationError(`File '${filePath}' is not a valid Strapi data file.`);\n    }\n\n    if (!this.#metadata) {\n      throw new ProviderInitializationError('Could not load metadata from Strapi data file.');\n    }\n  }\n\n  async #loadMetadata() {\n    const backupStream = this.#getBackupStream();\n    this.#metadata = await this.#parseJSONFile<IMetadata>(backupStream, METADATA_FILE_PATH);\n  }\n\n  async #loadAssetMetadata(path: string) {\n    const backupStream = this.#getBackupStream();\n    return this.#parseJSONFile<IFile>(backupStream, path);\n  }\n\n  async getMetadata() {\n    this.#reportInfo('getting metadata');\n    if (!this.#metadata) {\n      await this.#loadMetadata();\n    }\n\n    return this.#metadata ?? null;\n  }\n\n  async getSchemas() {\n    this.#reportInfo('getting schemas');\n    const schemaCollection = await utils.stream.collect<Struct.Schema>(\n      this.createSchemasReadStream()\n    );\n\n    if (isEmpty(schemaCollection)) {\n      throw new ProviderInitializationError('Could not load schemas from Strapi data file.');\n    }\n\n    // Group schema by UID\n    const schemas = keyBy('uid', schemaCollection);\n\n    // Transform to valid JSON\n    return utils.schema.schemasToValidJSON(schemas);\n  }\n\n  createEntitiesReadStream(): Readable {\n    this.#reportInfo('creating entities read stream');\n    return this.#streamJsonlDirectory('entities');\n  }\n\n  createSchemasReadStream(): Readable {\n    this.#reportInfo('creating schemas read stream');\n    return this.#streamJsonlDirectory('schemas');\n  }\n\n  createLinksReadStream(): Readable {\n    this.#reportInfo('creating links read stream');\n    return this.#streamJsonlDirectory('links');\n  }\n\n  createConfigurationReadStream(): Readable {\n    this.#reportInfo('creating configuration read stream');\n    // NOTE: TBD\n    return this.#streamJsonlDirectory('configuration');\n  }\n\n  createAssetsReadStream(): Readable | Promise<Readable> {\n    const inStream = this.#getBackupStream();\n    const outStream = new PassThrough({ objectMode: true });\n    const loadAssetMetadata = this.#loadAssetMetadata.bind(this);\n    this.#reportInfo('creating assets read stream');\n\n    let activeAsyncEntries = 0;\n    const runReadEntry = async (fn: () => Promise<void>) => {\n      activeAsyncEntries += 1;\n      try {\n        await fn();\n      } finally {\n        activeAsyncEntries -= 1;\n      }\n    };\n\n    pipeline(\n      [\n        inStream,\n        new Parser({\n          // find only files in the assets/uploads folder\n          filter(filePath: string, entry: Stats | ReadEntry) {\n            if (!('type' in entry) || entry.type !== 'File') {\n              return false;\n            }\n            return isFilePathInDirname('assets/uploads', filePath);\n          },\n          async onReadEntry(entry: ReadEntry) {\n            await runReadEntry(async () => {\n              const { path: filePath, size = 0 } = entry;\n              const normalizedPath = unknownPathToPosix(filePath);\n              const file = path.basename(normalizedPath);\n              let metadata;\n              try {\n                metadata = await loadAssetMetadata(`assets/metadata/${file}.json`);\n              } catch (error) {\n                throw new Error(`Failed to read metadata for ${file}`);\n              }\n              const asset: IAsset = {\n                metadata,\n                filename: file,\n                filepath: normalizedPath,\n                stats: { size },\n                stream: entry as unknown as Readable,\n              };\n              await write(outStream, asset);\n            });\n          },\n        }),\n      ],\n      (err) => this.#endPassThroughWhenTarIdle(outStream, () => activeAsyncEntries, err)\n    );\n\n    return outStream;\n  }\n\n  #getBackupStream() {\n    const { file, encryption, compression } = this.options;\n\n    const streams: StreamItemArray = [];\n\n    try {\n      streams.push(fs.createReadStream(file.path));\n    } catch (e) {\n      throw new Error(`Could not read backup file path provided at \"${this.options.file.path}\"`);\n    }\n\n    if (encryption.enabled && encryption.key) {\n      streams.push(utils.encryption.createDecryptionCipher(encryption.key));\n    }\n\n    if (compression.enabled) {\n      streams.push(zip.createGunzip());\n    }\n\n    return chain(streams);\n  }\n\n  // `directory` must be posix formatted path\n  #streamJsonlDirectory(directory: string) {\n    const inStream = this.#getBackupStream();\n\n    const outStream = new PassThrough({ objectMode: true });\n\n    let activeAsyncEntries = 0;\n    const runReadEntry = async (fn: () => Promise<void>) => {\n      activeAsyncEntries += 1;\n      try {\n        await fn();\n      } finally {\n        activeAsyncEntries -= 1;\n      }\n    };\n\n    pipeline(\n      [\n        inStream,\n        new Parser({\n          filter(filePath: string, entry: Stats | ReadEntry) {\n            if (!('type' in entry) || entry.type !== 'File') {\n              return false;\n            }\n\n            return isFilePathInDirname(directory, filePath);\n          },\n\n          async onReadEntry(entry: ReadEntry) {\n            await runReadEntry(async () => {\n              const transforms = [\n                // JSONL parser to read the data chunks one by one (line by line)\n                parser({\n                  checkErrors: true,\n                }),\n                // The JSONL parser returns each line as key/value\n                (line: { key: string; value: object }) => line.value,\n              ];\n\n              const stream = entry.pipe(chain(transforms));\n\n              try {\n                for await (const chunk of stream) {\n                  await write(outStream, chunk);\n                }\n              } catch (e: unknown) {\n                outStream.destroy(\n                  new ProviderTransferError(\n                    `Error parsing backup files from backup file ${entry.path}: ${\n                      (e as Error).message\n                    }`,\n                    {\n                      details: {\n                        error: e,\n                      },\n                    }\n                  )\n                );\n              }\n            });\n          },\n        }),\n      ],\n      (err) => this.#endPassThroughWhenTarIdle(outStream, () => activeAsyncEntries, err)\n    );\n\n    return outStream;\n  }\n\n  // For collecting an entire JSON file then parsing it, not for streaming JSONL\n  async #parseJSONFile<T extends object>(fileStream: Readable, filePath: string): Promise<T> {\n    return new Promise<T>((resolve, reject) => {\n      pipeline(\n        [\n          fileStream,\n          // Custom backup archive parsing\n          new Parser({\n            /**\n             * Filter the parsed entries to only keep the one that matches the given filepath\n             */\n            filter(entryPath: string, entry: Stats | ReadEntry) {\n              if (!('type' in entry) || entry.type !== 'File') {\n                return false;\n              }\n\n              return isPathEquivalent(entryPath, filePath);\n            },\n\n            async onReadEntry(entry: ReadEntry) {\n              // Collect all the content of the entry stream (ReadEntry has no .collect() in tar v7)\n              const chunks: Buffer[] = [];\n              for await (const chunk of entry) {\n                chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));\n              }\n\n              try {\n                // Parse from buffer array to string to JSON\n                const parsedContent = JSON.parse(Buffer.concat(chunks).toString());\n\n                // Resolve the Promise with the parsed content\n                resolve(parsedContent);\n              } catch (e) {\n                reject(e);\n              } finally {\n                // Cleanup (close the stream associated to the entry)\n                entry.destroy();\n              }\n            },\n          }),\n        ],\n        () => {\n          // If the promise hasn't been 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