function getDtHeaderValue()

in packages/rum-core/src/common/utils.js [81:95]

• 10 lines of code
• 7 McCabe index (conditional complexity)

function getDtHeaderValue(span) {
  const dtVersion = '00'
  const dtUnSampledFlags = '00'
  // 00000001 ->  '01' -> recorded
  const dtSampledFlags = '01'
  if (span && span.traceId && span.id && span.parentId) {
    var flags = span.sampled ? dtSampledFlags : dtUnSampledFlags
    /**
     * In the case of unsampled traces, propagate transaction id (parentId)
     * instead of span id to the downstream
     */
    var id = span.sampled ? span.id : span.parentId
    return dtVersion + '-' + span.traceId + '-' + id + '-' + flags
  }
}