agentsqripts/lib/code-complexity/technicalDebtAnalyzer.js

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

/**
 * @file Technical debt analyzer for code quality degradation detection
 * @description Single responsibility: Identify and quantify technical debt indicators throughout codebases
 * 
 * This analyzer systematically identifies technical debt patterns that indicate areas where
 * code quality has degraded due to time pressure, changing requirements, or accumulated
 * shortcuts. It provides quantitative debt scoring and categorized issue detection to help
 * teams prioritize refactoring efforts and maintain long-term code health.
 * 
 * Design rationale:
 * - Comprehensive debt detection covers multiple technical debt categories and patterns
 * - Severity-based classification helps prioritize remediation efforts by impact
 * - Quantitative scoring enables tracking of debt reduction over time
 * - Context-aware analysis reduces false positives through intelligent pattern matching
 * - Line-level issue reporting provides precise location information for remediation
 * 
 * Technical debt detection scope:
 * - Documentation debt: TODO, FIXME, HACK comments indicating incomplete implementations
 * - Code smell detection: Magic numbers, long parameter lists, excessive complexity
 * - Maintainability issues: Code duplication, unclear naming, architectural violations
 * - Performance debt: Inefficient algorithms, memory leaks, blocking operations
 * - Security debt: Hardcoded secrets, insecure patterns, authentication bypasses
 */

/**
 * Analyze technical debt in code content
 * @param {string} content - Code content to analyze
 * @returns {Object} Technical debt analysis results
 */
function analyzeTechnicalDebt(content) {
  const issues = [];
  const lines = content.split('\n');
  let debtScore = 0;
  
  lines.forEach((line, index) => {
    const trimmed = line.trim().toLowerCase();
    
    // Check for TODO/FIXME comments
    if (trimmed.includes('todo') || trimmed.includes('fixme') || trimmed.includes('hack')) {
      issues.push({
        type: 'todo_comment',
        line: index + 1,
        severity: trimmed.includes('fixme') ? 'HIGH' : 'MEDIUM',
        description: 'Technical debt marker found',
        content: line.trim()
      });
      debtScore += trimmed.includes('fixme') ? 3 : 1;
    }
    
    // Check for magic numbers
    const magicNumbers = line.match(/(?<![a-zA-Z_])\d{3,}(?![a-zA-Z_])/g);
    if (magicNumbers && !trimmed.includes('//') && !trimmed.includes('const')) {
      issues.push({
        type: 'magic_number',
        line: index + 1,
        severity: 'LOW',
        description: 'Magic number detected',
        suggestion: 'Consider using named constants'
      });
      debtScore += 1;
    }
    
    // Check for long parameter lists
    const paramMatch = line.match(/function\s+\w+\s*\(([^)]*)\)/);
    if (paramMatch) {
      const params = paramMatch[1].split(',').filter(p => p.trim());
      if (params.length > 5) {
        issues.push({
          type: 'long_parameter_list',
          line: index + 1,
          severity: 'MEDIUM',
          description: `Function has ${params.length} parameters`,
          suggestion: 'Consider using configuration object or splitting function'
        });
        debtScore += 2;
      }
    }
    
    // Check for deprecated patterns
    if (trimmed.includes('var ') && !trimmed.includes('//')) {
      issues.push({
        type: 'deprecated_var',
        line: index + 1,
        severity: 'LOW',
        description: 'Use of deprecated "var" keyword',
        suggestion: 'Replace with "const" or "let"'
      });
      debtScore += 1;
    }
  });
  
  return {
    debtScore,
    issues,
    debtLevel: debtScore > 20 ? 'HIGH' : debtScore > 10 ? 'MEDIUM' : 'LOW'
  };
}

module.exports = {
  analyzeTechnicalDebt
};