klz-cables.com/.pnpm-store/v10/files/41/340344a7367f3efa34375dc3563b80df30d38888ea80a8fd9765ef9a8e8c4c703fabee17f499e6b406159a2575aa0aaad1e2a70b6278dd1580cb2acc5afe19

import { parseBaggageHeader, objectToBaggageHeader } from '@sentry/core';

/**
 * Merge two baggage headers into one, where the existing one takes precedence.
 * The order of the existing baggage will be preserved, and new entries will be added to the end.
 */
function mergeBaggageHeaders(
  existing,
  baggage,
) {
  if (!existing) {
    return baggage;
  }

  const existingBaggageEntries = parseBaggageHeader(existing);
  const newBaggageEntries = parseBaggageHeader(baggage);

  if (!newBaggageEntries) {
    return existing;
  }

  // Existing entries take precedence, ensuring order remains stable for minimal changes
  const mergedBaggageEntries = { ...existingBaggageEntries };
  Object.entries(newBaggageEntries).forEach(([key, value]) => {
    if (!mergedBaggageEntries[key]) {
      mergedBaggageEntries[key] = value;
    }
  });

  return objectToBaggageHeader(mergedBaggageEntries);
}

export { mergeBaggageHeaders };
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