Local Explorer MCP

/** * Content minification utilities for token optimization */ import { getExtension } from './fileFilters.js'; /** * Minifies content based on file type * Removes extra whitespace, comments where safe, and normalizes line endings */ export function minifyContent(content: string, filePath: string): string { const extension = getExtension(filePath); try { switch (extension) { case 'js': case 'jsx': case 'ts': case 'tsx': case 'mjs': case 'cjs': return minifyJavaScript(content); case 'json': return minifyJSON(content); case 'css': case 'scss': case 'sass': case 'less': return minifyCSS(content); case 'html': case 'htm': case 'xml': return minifyHTML(content); case 'md': case 'markdown': return minifyMarkdown(content); case 'py': case 'rb': case 'sh': case 'bash': case 'yaml': case 'yml': // Conservative minification for indentation-sensitive languages return minifyConservative(content); default: return minifyGeneral(content); } } catch { // If minification fails, return original content return content; } } /** * Minifies JavaScript/TypeScript code * Removes single-line comments, extra whitespace, and normalizes formatting */ function minifyJavaScript(content: string): string { return ( content // Remove single-line comments (but not URLs) .replace(/(?<!:)\/\/[^\n]*/g, '') // Remove multi-line comments (but preserve JSDoc for types) .replace(/\/\*(?!\*)[^*]*\*+(?:[^/*][^*]*\*+)*\//g, '') // Remove extra whitespace .replace(/\s+/g, ' ') // Remove whitespace around operators and brackets .replace(/\s*([{}();,:])\s*/g, '$1') // Trim lines .split('\n') .map((line) => line.trim()) .filter((line) => line.length > 0) .join('\n') ); } /** * Minifies JSON content */ function minifyJSON(content: string): string { try { const parsed = JSON.parse(content); return JSON.stringify(parsed); } catch { return content; } } /** * Minifies CSS content */ function minifyCSS(content: string): string { return ( content // Remove comments .replace(/\/\*[^*]*\*+(?:[^/*][^*]*\*+)*\//g, '') // Remove extra whitespace .replace(/\s+/g, ' ') // Remove whitespace around special characters .replace(/\s*([{}:;,])\s*/g, '$1') .trim() ); } /** * Minifies HTML/XML content */ function minifyHTML(content: string): string { return ( content // Remove HTML comments .replace(/<!--[^>]*-->/g, '') // Remove extra whitespace between tags .replace(/>\s+</g, '><') // Remove extra whitespace .replace(/\s+/g, ' ') .trim() ); } /** * Minifies Markdown content * Removes excessive blank lines while preserving structure */ function minifyMarkdown(content: string): string { return ( content // Remove excessive blank lines (more than 2) .replace(/\n{3,}/g, '\n\n') // Remove trailing whitespace from lines .split('\n') .map((line) => line.trimEnd()) .join('\n') .trim() ); } /** * Conservative minification for indentation-sensitive languages * Only removes trailing whitespace and excessive blank lines */ function minifyConservative(content: string): string { return ( content // Remove excessive blank lines (more than 2) .replace(/\n{3,}/g, '\n\n') // Remove trailing whitespace .split('\n') .map((line) => line.trimEnd()) .join('\n') .trim() ); } /** * General minification for unknown file types * Very conservative - only removes trailing whitespace and excessive blank lines */ function minifyGeneral(content: string): string { return ( content // Remove excessive blank lines .replace(/\n{3,}/g, '\n\n') // Remove trailing whitespace .split('\n') .map((line) => line.trimEnd()) .join('\n') .trim() ); } /** * Calculates token savings from minification */ export function calculateTokenSavings( original: string, minified: string ): number { const originalSize = original.length; const minifiedSize = minified.length; const savings = originalSize - minifiedSize; return Math.round((savings / originalSize) * 100); }