Pega DX MCP Server

#!/usr/bin/env node /** * Mermaid to PNG Converter * Uses the official @mermaid-js/mermaid-cli via npx for reliable conversion * * Usage: * node tools/mermaid-to-png.js <input.mmd> <output-name> * echo "graph LR..." | node tools/mermaid-to-png.js - <output-name> */ import { execSync } from 'child_process'; import { readFile, writeFile, unlink } from 'fs/promises'; import { join, dirname } from 'path'; import { fileURLToPath } from 'url'; import { tmpdir } from 'os'; const __dirname = dirname(fileURLToPath(import.meta.url)); const mediaDir = join(__dirname, '../media'); /** * Read mermaid input from file or stdin */ async function readMermaidInput(inputPath) { if (inputPath === '-') { // Read from stdin return new Promise((resolve, reject) => { let data = ''; process.stdin.setEncoding('utf8'); process.stdin.on('data', chunk => { data += chunk; }); process.stdin.on('end', () => { resolve(data.trim()); }); process.stdin.on('error', reject); }); } else { // Read from file try { return await readFile(inputPath, 'utf8'); } catch (error) { throw new Error(`Failed to read input file: ${error.message}`); } } } /** * Convert Mermaid syntax to PNG using official CLI */ async function convertMermaidToPng(inputPath, outputName, options = {}) { const { theme = 'neutral', background = 'white', width = 1200, height = 800 } = options; let tempFile = null; try { console.log(`🔄 Reading Mermaid input...`); const mermaidSyntax = await readMermaidInput(inputPath); if (!mermaidSyntax.trim()) { throw new Error('No Mermaid syntax provided'); } // Create temporary file for mermaid input const timestamp = Date.now(); tempFile = join(tmpdir(), `mermaid-${timestamp}.mmd`); console.log(`📝 Writing temporary file: ${tempFile}`); await writeFile(tempFile, mermaidSyntax); // Prepare output path const outputPath = join(mediaDir, `${outputName}.png`); // Build mmdc command with options const mmdc_options = [ `-i "${tempFile}"`, `-o "${outputPath}"`, `-t ${theme}`, `-b ${background}`, `--width ${width}`, `--height ${height}` ].join(' '); console.log(`🎨 Converting with mermaid-cli...`); console.log(`Command: npx -p @mermaid-js/mermaid-cli mmdc ${mmdc_options}`); // Execute conversion using npx and official CLI execSync(`npx -p @mermaid-js/mermaid-cli mmdc ${mmdc_options}`, { stdio: 'inherit', cwd: process.cwd() }); console.log(`\n🎉 Conversion completed successfully!`); console.log(`📁 Output: ${outputPath}`); } catch (error) { console.error(`❌ Error: ${error.message}`); process.exit(1); } finally { // Clean up temporary file if (tempFile) { try { await unlink(tempFile); console.log(`🧹 Cleaned up temporary file`); } catch (cleanupError) { console.warn(`⚠️ Warning: Could not clean up temporary file: ${cleanupError.message}`); } } } } /** * CLI Interface */ function main() { const args = process.argv.slice(2); if (args.length < 2) { console.log(` 📊 Mermaid to PNG Converter (Official CLI) Usage: node tools/mermaid-to-png.js <input.mmd> <output-name> echo "graph LR..." | node tools/mermaid-to-png.js - <output-name> Examples: node tools/mermaid-to-png.js diagram.mmd architecture echo "graph LR; A-->B" | node tools/mermaid-to-png.js - simple-flow Options: input.mmd Mermaid file path (use '-' for stdin) output-name Output filename (without .png extension) Output: Saves PNG file to ./media/<output-name>.png Features: ✅ Uses official @mermaid-js/mermaid-cli via npx ✅ No additional dependencies required ✅ Professional quality output ✅ Reliable DOM environment handling `); process.exit(1); } const [inputPath, outputName] = args; // Parse additional options (can be extended) const options = { theme: 'neutral', background: 'white', width: 1200, height: 800 }; convertMermaidToPng(inputPath, outputName, options); } // Run if called directly if (import.meta.url === `file://${process.argv[1]}`) { main(); } export { convertMermaidToPng };