groupEndpoints function

index.js

const groupEndpoints = (spec) => {
  const groups = new Map();
  
  Object.entries(spec.paths || {}).forEach(([path, methods]) => {
    const resource = path.split('/').filter(Boolean)[0] || 'root';
    
    if (!groups.has(resource)) {
      groups.set(resource, []);
    }
    
    Object.entries(methods)
      .filter(([_, op]) => op && typeof op === 'object')
      .forEach(([method, operation]) => {
        groups.get(resource).push(extractEndpoint(path, method, operation));
      });
  });
  
  return groups;
};