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29 KiB
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1 line
29 KiB
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this.piscina.run({filePath, algorithms});\n }\n}\n","import { FileIDComputer } from \"./fileID/FileIDComputer\";\nimport {CID_ALGORITHM_NAMES, ComputeInterface, MultiHashData} from \"./MultiHashData\";\n\nexport class HashComputer implements ComputeInterface{\n private fileIDComputer:FileIDComputer;\n\n constructor(private targetHash: CID_ALGORITHM_NAMES[],workerPath?:string) {\n this.fileIDComputer = new FileIDComputer(workerPath);\n }\n\n async computeMissingHash(filePath: string, metadata: MultiHashData): Promise<void> {\n // Dynamically determine which hashes are needed\n const neededHashes = this.targetHash.filter(hashName => !metadata[hashName]);\n\n // If all hashes are already computed, skip the processing\n if (neededHashes.length === 0) {\n return;\n }\n\n // Compute only the needed CIDs\n const cids = await this.fileIDComputer.computeCIDs(filePath, neededHashes);\n\n // Map the computed CIDs back to their respective metadata properties\n cids.forEach((cid, index) => {\n const hashType = neededHashes[index];\n metadata[hashType] = cid;\n });\n }\n}\n","import {createReadStream, promises as fs} from 'fs';\nimport {parse} from 'csv-parse';\nimport {parse as parseSync} from 'csv-parse/sync';\nimport {stringify} from 'csv-stringify/sync';\nimport {existsAsync} from \"./ExistsAsync\";\nimport path from \"path\";\nimport {clearInterval} from \"node:timers\";\nimport {CID_ALGORITHM_NAMES} from \"./MultiHashData\";\n\ninterface IndexLine extends Partial<Record<CID_ALGORITHM_NAMES, string>> {\n path: string;\n size: string;\n mtime: string;\n}\n\nexport const INDEX_HEADERS = ['path', 'size', 'mtime'];\n\nexport class HashIndexManager {\n private cache: Map<string, IndexLine> = new Map<string, IndexLine>();\n private intervalId: NodeJS.Timeout;\n private intervalTime: number = 30000;\n private lastIndexFileSize: number = 0; //size of the index file last time it was read\n private lastCacheFile: IndexLine[]; //state of the file last time it was read\n private indexOpsInProgress: boolean = false;\n private hasChanged: boolean = false;\n private initialLoad: Promise<void>;\n private filePaths: { [key in CID_ALGORITHM_NAMES]?: string } = {};\n\n constructor(filePath: string, private targetHash: CID_ALGORITHM_NAMES[] = [CID_ALGORITHM_NAMES.sha1, CID_ALGORITHM_NAMES.sha256]) {\n filePath = filePath.replace(\".csv\", \"\");\n for (const hash of this.targetHash) {\n this.filePaths[hash] = `${filePath}-${hash}.csv`;\n if (!this.filePaths[hash]) {\n throw new Error(`Invalid index file path for ${hash}`);\n }\n }\n }\n\n public getCache(): Map<string, IndexLine> {\n return new Map(this.cache);\n }\n\n /**\n * After init consseutively calls to this method will not reload the index\n * @param autosave\n */\n public async init(autosave = true) {\n if (!this.initialLoad) {\n this.initialLoad = new Promise<void>(async (resolve, reject) => {\n try {\n for (const hash of this.targetHash) {\n if (!this.checkCSVHeaders(this.filePaths[hash], hash)) {\n throw new Error(`Invalid index file headers for ${hash}`);\n }\n await this.loadIndex(hash);\n }\n if (autosave) {\n this.start();\n }\n resolve();\n } catch (e) {\n reject(e);\n }\n });\n }\n return this.initialLoad;\n }\n\n // Function to check CSV headers\n private checkCSVHeaders(csvContent: string, hash: CID_ALGORITHM_NAMES): boolean {\n const records = parseSync(csvContent, {\n bom: true,\n columns: true,\n skip_empty_lines: true,\n });\n\n if (records.length === 0) {\n //we will write the headers\n return true;\n }\n\n // Extract headers\n const headers = Object.keys(records[0]);\n\n // Define required headers\n //from the IndexLine interface\n const requiredHeaders = [...INDEX_HEADERS, hash];\n\n // Check if all required headers are present\n return requiredHeaders.every(header => headers.includes(header));\n };\n\n public start() {\n this.startAutoSave(this.intervalTime);\n }\n\n public stopAutoSave() {\n if (this.intervalId) {\n clearInterval(this.intervalId);\n }\n }\n\n private startAutoSave(time: number) {\n this.stopAutoSave();\n this.intervalTime = time;\n this.intervalId = setInterval(() => this.saveCacheToFile(), time);\n }\n\n public async loadIndex(hash: CID_ALGORITHM_NAMES): Promise<IndexLine[]> {\n if (await existsAsync(this.filePaths[hash])) {\n // check the file size and if it did not change, do not read the file\n const stats = await fs.stat(this.filePaths[hash]);\n if (this.lastIndexFileSize !== stats.size) {\n // Read existing file content and parse it\n const records: IndexLine[] = await this.readCsv(hash);\n for (const record of records) {\n let indexLine = this.cache.get(record.path);\n if (!indexLine) {\n this.cache.set(record.path, record);\n } else {\n //update the cache with the latest data\n indexLine[hash] = record[hash];\n }\n }\n this.lastIndexFileSize = stats.size;\n this.lastCacheFile = records;\n return records;\n } else {\n return this.lastCacheFile;\n }\n }\n return [];\n }\n\n private loadIndexFromCache(): IndexLine[] {\n return Array.from(this.cache.values());\n }\n\n private async readCsv(hash: CID_ALGORITHM_NAMES): Promise<IndexLine[]> {\n if (!(await existsAsync(this.filePaths[hash]))) {\n return [];\n }\n const start = performance.now();\n\n const parser = parse({\n columns: true,\n skip_empty_lines: true,\n });\n\n const records: IndexLine[] = [];\n\n return new Promise((resolve, reject) => {\n createReadStream(this.filePaths[hash])\n .pipe(parser)\n .on('data', (record) => {\n records.push(record);\n }).on('end', () => {\n resolve(records);\n console.log(`Index read ${hash} time ${performance.now() - start}ms`);\n }).on('error', (err) => {\n reject(err);\n });\n });\n }\n\n private async saveCacheToFile(): Promise<void> {\n if (this.indexOpsInProgress || !this.hasChanged) {\n return;\n }\n this.hasChanged = false;\n this.indexOpsInProgress = true;\n const start = performance.now();\n\n for (const hash of this.targetHash) {\n let existingRows: IndexLine[] = await this.loadIndex(hash);\n if (this.cache.size !== 0) {\n const cacheRows: IndexLine[] = this.loadIndexFromCache();\n // Filter out cacheRows that are already in the file\n const newRows = cacheRows.filter(row => !existingRows.find(existingRow => existingRow.path === row.path));\n\n if (newRows.length !== 0) {\n // Serialize new cacheRows to CSV string\n const csvString = stringify(newRows, {\n header: existingRows.length === 0, // Only add header if the file was empty\n columns: [\n {key: 'path', header: 'path'},\n {key: 'size', header: 'size'},\n {key: 'mtime', header: 'mtime'},\n {key: hash, header: hash},\n ],\n });\n\n // Append new cacheRows to the file\n await fs.appendFile(this.filePaths[hash], csvString);\n }\n }\n }\n const totalTime = performance.now() - start;\n console.log(`Index saved in ${totalTime}ms`);\n // Check if the time to save the index is greater than the interval time. increase the interval time if needed\n if (totalTime * 10 > this.intervalTime) {\n this.startAutoSave(totalTime * 10);\n console.log(`Index save interval increased to ${totalTime * 10}ms`);\n }\n this.indexOpsInProgress = false;\n }\n\n public getCidForFile(filePath: string, fileSize: number, mtime: string): IndexLine {\n const fileName = path.basename(filePath);\n let fileNameIndex = this.cache.get(fileName);\n if (fileNameIndex) {\n if (fileNameIndex.mtime) {\n //if we have a mtime, we need to check it\n if (fileNameIndex.size === (fileSize + \"\") && fileNameIndex.mtime === mtime) {\n return fileNameIndex;\n }\n } else {\n //mtime is optional\n if (fileNameIndex.size === (fileSize + \"\")) {\n return fileNameIndex;\n }\n }\n }\n\n // 3 - if not found, delete the entry (keeps the index clean)\n /*if (fileNameIndex && fileNameIndex.size !== (fileSize + \"\") && pathIndex && pathIndex.size !== (fileSize + \"\")) {\n this.cache.delete(fileName);\n this.cache.delete(filePath);\n }*/\n\n return null;\n }\n\n public addFileCid(filePath: string, fileSize: number, mtime: string, hashs: Partial<Record<CID_ALGORITHM_NAMES, string>>): void {\n if (!filePath || !fileSize || !mtime || !hashs) {\n throw new Error('Invalid parameters');\n }\n for (const hash of this.targetHash) {\n if (!hashs[hash]) {\n throw new Error(`Missing hash ${hash}`);\n }\n }\n const size = fileSize + \"\";\n const baseName = path.basename(filePath);\n let indexLine = this.cache.get(baseName);\n if (!indexLine) {\n const data = {path: baseName, size: size, mtime: mtime, ...hashs};\n this.cache.set(baseName, data);\n } else {\n //update the cache with the latest data\n for (const hash of this.targetHash) {\n indexLine[hash] = hashs[hash];\n }\n }\n this.hasChanged = true;\n }\n\n}","// Example of checking if a file exists asynchronously\n// Note: `existsSync` does not have a direct async equivalent, so we use `access` instead.\nimport {access,constants} from \"fs/promises\";\n\nexport async function existsAsync(filePath: string): Promise<boolean> {\n try {\n await access(filePath, constants.F_OK);\n return true; // File exists\n } catch {\n return false; // File does not exist\n }\n}","import {HashComputer} from \"./HashComputer\";\nimport {CID_ALGORITHM_NAMES, ComputeInterface, MultiHashData} from \"./MultiHashData\";\nimport {HashIndexManager} from \"./HashIndexManager\";\nimport {stat} from \"fs/promises\";\nimport path from \"path\";\n\nexport class ComputeHashIndexCache implements ComputeInterface {\n hashIndexManager: HashIndexManager;\n hashComputer: HashComputer;\n\n constructor(indexFilePath: string,private targetHash: CID_ALGORITHM_NAMES[] = [CID_ALGORITHM_NAMES.sha1, CID_ALGORITHM_NAMES.sha256],workerPath?:string) {\n this.hashComputer = new HashComputer(targetHash,workerPath);\n this.hashIndexManager = new HashIndexManager(indexFilePath,targetHash);\n }\n\n async computeMissingHash(filePath: string, metadata: MultiHashData): Promise<void> {\n await this.hashIndexManager.init();\n let stats = await stat(filePath);\n if (this.hashIndexManager.getCache().has(path.basename(filePath))) {\n const indexLine = this.hashIndexManager.getCidForFile(filePath, stats.size, stats.mtime.toISOString());\n if(indexLine) {\n for (const hash of this.targetHash) {\n if (!metadata[hash] && indexLine[hash]) {\n metadata[hash] = indexLine[hash];\n }\n }\n }\n }\n await this.hashComputer.computeMissingHash(filePath, metadata);\n this.hashIndexManager.addFileCid(filePath, stats.size, stats.mtime.toISOString(), metadata);\n }\n}","import * as path from 'path';\nimport chokidar from 'chokidar';\nimport {readdir} from \"fs/promises\";\nimport PQueue from \"p-queue\";\nimport {FileProcessorInterface} from \"./FileProcessorInterface.js\";\n\nexport class FolderWatcher {\n initialized = false;\n queue = new PQueue({concurrency: 100, autoStart: true});\n fileProcessor: FileProcessorInterface;\n queueSize = -1;\n current = 0;\n processing = new Set<string>();\n\n constructor(fileProcessor:FileProcessorInterface,private WATCH_FOLDER_LIST: string, private config:{\n interval?: number,\n stabilityThreshold?: number,\n pollInterval?: number,\n }) {\n this.fileProcessor = fileProcessor;\n }\n\n /**\n * Process the directory and its subdirectories\n * @param directory\n * @param promises\n * @private\n */\n private async processDirectory(directory: string, promises: Promise<any>[]) {\n const entries = await readdir(directory, {withFileTypes: true});\n for (const entry of entries) {\n const fullPath = path.join(directory, entry.name);\n if (entry.isDirectory()) {\n await this.processDirectory(fullPath, promises);\n } else {\n const promise = this.processFile(fullPath);\n promises.push(promise);\n }\n }\n }\n\n private async countFile(directory: string): Promise<number> {\n const entries = await readdir(directory, {withFileTypes: true});\n const countPromises: Promise<any>[] = [];\n\n for (const entry of entries) {\n const fullPath = path.join(directory, entry.name);\n if (entry.isDirectory()) {\n // Push the promise without waiting for it here\n countPromises.push(this.countFile(fullPath));\n } else {\n // Use an IIFE (Immediately Invoked Function Expression) to handle asynchronous condition\n countPromises.push(this.queue.add(\n async () => (await this.fileProcessor.canProcessFile(fullPath)) ? 1 : 0\n ));\n }\n }\n\n // Wait for all promises to resolve and then sum up their results\n const counts = await Promise.all(countPromises);\n return counts.reduce((acc, current) => acc + current, 0);\n }\n\n private async processFile(filePath: string):Promise<void> {\n if(await this.fileProcessor.canProcessFile(filePath)) {\n if(!this.processing.has(filePath)) {\n this.processing.add(filePath);//avoid double processing in the queue\n const current = ++this.current;\n await this.queue.add(() => this.fileProcessor.processFile(current, this.queueSize, filePath));\n this.processing.delete(filePath);\n }\n }\n }\n\n /**\n * Process the file and its sibling file included other folder it is a recursive function\n * @param filePath\n * @private\n */\n private async processFileExtended(filePath: string):Promise<void> {\n let dirname = path.dirname(filePath);\n await this.processDirectory(dirname, []);\n }\n\n private chokidarWatch(folderList: string[]){\n const chokidarconfig = {\n ignoreInitial: true,//ignore the initial scan we have our own function\n persistent: true,\n depth: Infinity,\n awaitWriteFinish: {\n stabilityThreshold: this.config.stabilityThreshold || 30000,\n pollInterval: this.config.pollInterval || 5000\n }\n };\n\n let watcher: chokidar.FSWatcher;\n if ((this.config.interval || 0) <= 0) {\n watcher = chokidar.watch(folderList, chokidarconfig);\n } else {\n watcher = chokidar.watch(folderList, {\n ...chokidarconfig,\n usePolling: true,\n interval: this.config.interval || 0\n });\n }\n\n watcher\n .on('add', async (filePath) => {\n try {\n await this.processFileExtended(filePath);\n } catch (error) {\n console.error(`Error processing file ${filePath}:`, error);\n }\n })\n .on('change', async (filePath) => {\n try {\n await this.processFileExtended(filePath);\n } catch (e) {\n console.error(`Error processing file ${filePath}:`, e);\n }\n })\n .on('unlink', async (filePath) => {\n try {\n await this.fileProcessor.deleteFile(filePath);\n await this.processFileExtended(filePath);\n } catch (e) {\n console.error(`Error processing file deletion:`, e);\n }\n })\n .on('error', (error) => console.error(`Watcher error: ${error}`))\n .on('ready', () => {\n console.log(`Watching for file changes on ${folderList}`);\n });\n }\n\n async watch() {\n let folders = this.WATCH_FOLDER_LIST;\n if (!folders) {\n throw new Error(`No folder to watch`);\n }\n let folderList = folders.split(',');\n\n this.chokidarWatch(folderList);\n\n //start the initial scan\n let countPromises = [];\n for (let i = 0; i < folderList.length; i++) {\n folderList[i] = path.normalize(folderList[i]);\n countPromises.push(this.countFile(folderList[i]));\n }\n const count = (await Promise.all(countPromises)).reduce((acc, current) => acc + current, 0);\n console.log(`Found ${count} files to process`);\n this.queueSize = count;\n let promises: Promise<any>[] = [];\n for (let i = 0; i < folderList.length; i++) {\n folderList[i] = path.normalize(folderList[i]);\n await this.processDirectory(folderList[i], promises);\n }\n await Promise.all(promises);\n this.initialized = true;\n\n console.log(`Watcher ready`);\n }\n}\n"]} |