mcp-mermiad

/** * File system utilities for Mermaid MCP Server */ import fs from 'fs/promises'; import path from 'path'; import { ExportOptions } from '../types/index.js'; /** * Save SVG content to file */ export async function saveSVG( svgContent: string, filePath: string ): Promise<string> { try { // Ensure directory exists const dir = path.dirname(filePath); await fs.mkdir(dir, { recursive: true }); // Write SVG file await fs.writeFile(filePath, svgContent, 'utf-8'); return filePath; } catch (error) { console.error('Error saving SVG:', error); throw new Error(`Failed to save SVG: ${error}`); } } /** * Save binary content (PNG, PDF) to file */ export async function saveBinary( content: Buffer, filePath: string ): Promise<string> { try { // Ensure directory exists const dir = path.dirname(filePath); await fs.mkdir(dir, { recursive: true }); // Write binary file await fs.writeFile(filePath, content); return filePath; } catch (error) { console.error('Error saving binary file:', error); throw new Error(`Failed to save binary file: ${error}`); } } /** * Read file content */ export async function readFile(filePath: string): Promise<string> { try { return await fs.readFile(filePath, 'utf-8'); } catch (error) { console.error('Error reading file:', error); throw new Error(`Failed to read file: ${error}`); } } /** * Check if file exists */ export async function fileExists(filePath: string): Promise<boolean> { try { await fs.access(filePath); return true; } catch { return false; } } /** * Get file stats */ export async function getFileStats(filePath: string) { try { return await fs.stat(filePath); } catch (error) { console.error('Error getting file stats:', error); throw new Error(`Failed to get file stats: ${error}`); } } /** * Generate output path for diagram */ export function generateOutputPath( options: ExportOptions, fallbackName: string = 'diagram' ): string { const filename = options.filename || `${fallbackName}.${options.format}`; const outputPath = options.path || process.cwd(); return path.resolve(outputPath, filename); } /** * Ensure output directory exists */ export async function ensureOutputDirectory(filePath: string): Promise<void> { const dir = path.dirname(filePath); await fs.mkdir(dir, { recursive: true }); } /** * List files in directory with extension filter */ export async function listFiles( dirPath: string, extensions?: string[] ): Promise<string[]> { try { const files = await fs.readdir(dirPath); if (!extensions) { return files; } return files.filter((file: string) => { const ext = path.extname(file).toLowerCase(); return extensions.includes(ext); }); } catch (error) { console.error('Error listing files:', error); throw new Error(`Failed to list files: ${error}`); } } /** * Clean up temporary files */ export async function cleanupTempFiles(tempDir: string): Promise<void> { try { const files = await fs.readdir(tempDir); for (const file of files) { const filePath = path.join(tempDir, file); const stats = await fs.stat(filePath); // Remove files older than 1 hour if (Date.now() - stats.mtime.getTime() > 3600000) { await fs.unlink(filePath); } } } catch (error) { console.warn('Warning: Could not clean up temp files:', error); } }