agentsqripts/lib/cleanup/duplicationDetector.js

Comprehensive static code analysis toolkit for identifying technical debt, security vulnerabilities, performance issues, and code quality problems

/**
 * @file Code duplication detection
 * @description Detects code duplication within files
 */

/**
 * Find code duplication within a single file
 */
function findIntraFileDuplication(content) {
  const lines = content.split('\n').map(line => line.trim()).filter(line => line.length > 5);
  const duplicates = [];
  const lineMap = new Map();
  
  // Optimized line-based duplication detection with for loop
  for (let index = 0; index < lines.length; index++) {
    const line = lines[index];
    if (line.startsWith('//') || line.startsWith('/*')) continue;
    
    if (lineMap.has(line)) {
      duplicates.push({
        line: index + 1,
        content: line,
        originalLine: lineMap.get(line) + 1
      });
    } else {
      lineMap.set(line, index);
    }
  }
  
  return {
    score: lines.length > 0 ? duplicates.length / lines.length : 0,
    duplicates: duplicates.slice(0, 10) // Limit to first 10 for brevity
  };
}

module.exports = {
  findIntraFileDuplication
};