@sentry/core/esm/envelope.js

import { dsnToString, createEnvelope, dropUndefinedKeys, getSentryBaggageItems } from '@sentry/utils';

/** Extract sdk info from from the API metadata */
function getSdkMetadataForEnvelopeHeader(metadata) {
  if (!metadata || !metadata.sdk) {
    return;
  }
  const { name, version } = metadata.sdk;
  return { name, version };
}

/**
 * Apply SdkInfo (name, version, packages, integrations) to the corresponding event key.
 * Merge with existing data if any.
 **/
function enhanceEventWithSdkInfo(event, sdkInfo) {
  if (!sdkInfo) {
    return event;
  }
  event.sdk = event.sdk || {};
  event.sdk.name = event.sdk.name || sdkInfo.name;
  event.sdk.version = event.sdk.version || sdkInfo.version;
  event.sdk.integrations = [...(event.sdk.integrations || []), ...(sdkInfo.integrations || [])];
  event.sdk.packages = [...(event.sdk.packages || []), ...(sdkInfo.packages || [])];
  return event;
}

/** Creates an envelope from a Session */
function createSessionEnvelope(
  session,
  dsn,
  metadata,
  tunnel,
) {
  var sdkInfo = getSdkMetadataForEnvelopeHeader(metadata);
  var envelopeHeaders = {
    sent_at: new Date().toISOString(),
    ...(sdkInfo && { sdk: sdkInfo }),
    ...(!!tunnel && { dsn: dsnToString(dsn) }),
  };

  var envelopeItem =
    'aggregates' in session ? [{ type: 'sessions' }, session] : [{ type: 'session' }, session];

  return createEnvelope(envelopeHeaders, [envelopeItem]);
}

/**
 * Create an Envelope from an event.
 */
function createEventEnvelope(
  event,
  dsn,
  metadata,
  tunnel,
) {
  var sdkInfo = getSdkMetadataForEnvelopeHeader(metadata);
  var eventType = event.type || 'event';

  const { transactionSampling } = event.sdkProcessingMetadata || {};
  const { method: samplingMethod, rate: sampleRate } = transactionSampling || {};

  enhanceEventWithSdkInfo(event, metadata && metadata.sdk);

  var envelopeHeaders = createEventEnvelopeHeaders(event, sdkInfo, tunnel, dsn);

  // Prevent this data (which, if it exists, was used in earlier steps in the processing pipeline) from being sent to
  // sentry. (Note: Our use of this property comes and goes with whatever we might be debugging, whatever hacks we may
  // have temporarily added, etc. Even if we don't happen to be using it at some point in the future, let's not get rid
  // of this `delete`, lest we miss putting it back in the next time the property is in use.)
  delete event.sdkProcessingMetadata;

  var eventItem = [
    {
      type: eventType,
      sample_rates: [{ id: samplingMethod, rate: sampleRate }],
    },
    event,
  ];
  return createEnvelope(envelopeHeaders, [eventItem]);
}

function createEventEnvelopeHeaders(
  event,
  sdkInfo,
  tunnel,
  dsn,
) {
  var baggage = event.sdkProcessingMetadata && event.sdkProcessingMetadata.baggage;
  var dynamicSamplingContext = baggage && getSentryBaggageItems(baggage);

  return {
    event_id: event.event_id ,
    sent_at: new Date().toISOString(),
    ...(sdkInfo && { sdk: sdkInfo }),
    ...(!!tunnel && { dsn: dsnToString(dsn) }),
    ...(event.type === 'transaction' &&
      dynamicSamplingContext && {
        trace: dropUndefinedKeys({ ...dynamicSamplingContext }) ,
      }),
  };
}

export { createEventEnvelope, createSessionEnvelope };
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