TinyPNG MCP Server

import * as fs from 'fs' import * as path from 'path' import { RECORD_FILE_NAME } from './fileUtils.js' /** * Interface for compression record structure using relative paths. */ export interface CompressionRecord { compressedFiles: { [relativePath: string]: { hash: string size: number mtime: number compressedAt: string originalSize: number compressedSize: number savings: number } } lastUpdated: string version: string } /** * Read compression record from record.json file. * * @param directoryPath The path to the directory containing the record file. * @returns Promise that resolves to the compression record or null if file doesn't exist. */ export async function readCompressionRecord(directoryPath: string): Promise<CompressionRecord | null> { const recordPath = path.join(directoryPath, RECORD_FILE_NAME) try { if (!fs.existsSync(recordPath)) { return null } const recordContent = await fs.promises.readFile(recordPath, 'utf-8') const record = JSON.parse(recordContent) as CompressionRecord /* Validate record structure */ if (record.version === '2.0' && typeof record.compressedFiles === 'object') { return record } /* Invalid or unknown format, return null */ return null } catch (error) { /* Return null if record file is corrupted or cannot be read */ return null } } /** * Write compression record to record.json file. * * @param directoryPath The path to the directory to write the record file. * @param record The compression record to write. * @returns Promise that resolves when the record is written. */ export async function writeCompressionRecord(directoryPath: string, record: CompressionRecord): Promise<void> { const recordPath = path.join(directoryPath, RECORD_FILE_NAME) const recordContent = JSON.stringify(record, null, 2) await fs.promises.writeFile(recordPath, recordContent, 'utf-8') }