agentsqripts/lib/scalability/scalabilityFileAnalyzer.js

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

/**
 * @file Individual file scalability analyzer for performance bottleneck detection
 * @description Single responsibility: Perform comprehensive scalability analysis on individual JavaScript files
 * 
 * This analyzer implements multi-dimensional scalability analysis to identify performance
 * bottlenecks, blocking operations, inefficient algorithms, and scalability anti-patterns
 * that could impact application performance under load or with large datasets. It provides
 * detailed analysis with actionable recommendations for improving application scalability.
 * 
 * Design rationale:
 * - Comprehensive detector coverage identifies diverse scalability bottlenecks from I/O to algorithms
 * - Modular detector architecture enables focused testing and maintenance of individual patterns
 * - Issue severity classification helps prioritize scalability improvements based on impact
 * - Quantitative scoring provides measurable scalability assessment for tracking improvements
 * - Context-aware analysis considers file type and framework patterns for accurate detection
 * 
 * Scalability analysis scope:
 * - Blocking operations: Synchronous I/O, CPU-intensive loops, blocking database calls
 * - Algorithmic inefficiencies: O(n²) patterns, inefficient data structures, nested iterations
 * - Memory issues: Memory leaks, inefficient object creation, large array operations
 * - Framework patterns: React rendering issues, inefficient event handling, DOM manipulation
 * - Database anti-patterns: N+1 queries, missing indexes, inefficient query patterns
 */

// Import all detector modules
const { detectBlockingSync } = require('./blockingSyncDetector');
const { detectNPlusOne } = require('./nPlusOneDetector');
const { detectFileIO } = require('./fileIODetector');
const { detectUnboundedMemory } = require('./unboundedMemoryDetector');
const { detectHeavyLoops } = require('./heavyLoopDetector');
const { detectExcessiveDBConnections } = require('./databaseConnectionDetector');
const { detectGlobalVariables } = require('./globalVariableDetector');
const { calculateScalabilityScore, getScalabilityGrade } = require('./scalabilityScoreCalculator');

/**
 * Analyzes a single file for scalability issues
 * @param {string} filePath - Path to the file
 * @param {string} content - File content (optional)
 * @returns {Object} Scalability analysis results for the file
 */
async function analyzeFileScalability(filePath, content = null) {
  const { promises: fsPromises } = require('fs');
  
  if (!content) {
    try {
      content = await fsPromises.readFile(filePath, 'utf8');
    } catch (error) {
      return {
        file: filePath,
        error: `Could not read file: ${error.message}`,
        issues: [],
        summary: { totalIssues: 0, score: 100, grade: 'A' }
      };
    }
  }
  
  // Run all scalability detectors
  const issues = [];
  issues.push(...detectBlockingSync(content, filePath));
  issues.push(...detectNPlusOne(content, filePath));
  issues.push(...detectFileIO(content, filePath));
  issues.push(...detectUnboundedMemory(content, filePath));
  issues.push(...detectHeavyLoops(content, filePath));
  issues.push(...detectExcessiveDBConnections(content, filePath));
  issues.push(...detectGlobalVariables(content, filePath));
  
  // Calculate metrics
  const score = calculateScalabilityScore(issues);
  const grade = getScalabilityGrade(score);
  
  // Calculate category breakdown
  const categoryBreakdown = {};
  const severityBreakdown = { HIGH: 0, MEDIUM: 0, LOW: 0 };
  
  issues.forEach(issue => {
    categoryBreakdown[issue.category] = (categoryBreakdown[issue.category] || 0) + 1;
    severityBreakdown[issue.severity] = (severityBreakdown[issue.severity] || 0) + 1;
  });
  
  return {
    file: filePath,
    issues,
    scalabilityScore: score,
    metrics: {
      totalIssues: issues.length,
      score,
      grade,
      categoryBreakdown,
      severityBreakdown
    },
    summary: {
      totalIssues: issues.length,
      score,
      grade,
      categoryBreakdown,
      severityBreakdown
    }
  };
}

module.exports = {
  analyzeFileScalability
};