agentsqripts/lib/wet-code/ast/duplicate-type/compareBlocks.js

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

/**
 * @file Compare two blocks and identify differences
 * @description Single responsibility: Perform detailed comparison between two code blocks
 */

const isVariableNameDifference = require('./isVariableNameDifference');
const isStringLiteralDifference = require('./isStringLiteralDifference');
const isNumberDifference = require('./isNumberDifference');
const isFunctionCallDifference = require('./isFunctionCallDifference');

/**
 * Compare two blocks and identify differences
 */
function compareBlocks(block1, block2) {
  const lines1 = block1.content.split('\n');
  const lines2 = block2.content.split('\n');
  const differences = {
    totalDifferences: 0,
    variableNames: 0,
    stringLiterals: 0,
    numbers: 0,
    functionCalls: 0,
    structure: 0
  };
  
  // Simple line-by-line comparison (could be enhanced with AST diff)
  const maxLines = Math.max(lines1.length, lines2.length);
  
  for (let i = 0; i < maxLines; i++) {
    const line1 = lines1[i];
    const line2 = lines2[i];
    
    if (line1 === line2) continue;
    
    differences.totalDifferences++;
    
    if (!line1 || !line2) {
      differences.structure++;
      continue;
    }
    
    // Analyze type of difference
    if (isVariableNameDifference(line1, line2)) {
      differences.variableNames++;
    } else if (isStringLiteralDifference(line1, line2)) {
      differences.stringLiterals++;
    } else if (isNumberDifference(line1, line2)) {
      differences.numbers++;
    } else if (isFunctionCallDifference(line1, line2)) {
      differences.functionCalls++;
    } else {
      differences.structure++;
    }
  }
  
  return differences;
}

module.exports = compareBlocks;