Function logEventTo1PAsync

src/services/analytics/firstPartyEventLogger.ts:157–208

* Log a 1st-party event for internal analytics (async version). * Events are batched and exported to /api/event_logging/batch * * This enriches the event with core metadata (model, session, env context, etc.) * at log time, similar to logEventToStatsig. * * @param eventName - Name of the event

(
  firstPartyEventLogger: Logger,
  eventName: string,
  metadata: Record<string, number | boolean | undefined> = {},
)

 * @param metadata - Additional metadata for the event (intentionally no strings, to avoid accidentally logging code/filepaths)
 */
async function logEventTo1PAsync(
  firstPartyEventLogger: Logger,
  eventName: string,
  metadata: Record<string, number | boolean | undefined> = {},
): Promise<void> {
  try {
    // Enrich with core metadata at log time (similar to Statsig pattern)
    const coreMetadata = await getEventMetadata({
      model: metadata.model,
      betas: metadata.betas,
    })

    // Build attributes - OTel supports nested objects natively via AnyValueMap
    // Cast through unknown since our nested objects are structurally compatible
    // with AnyValue but TS doesn't recognize it due to missing index signatures
    const attributes = {
      event_name: eventName,
      event_id: randomUUID(),
      // Pass objects directly - no JSON serialization needed
      core_metadata: coreMetadata,
      user_metadata: getCoreUserData(true),
      event_metadata: metadata,
    } as unknown as AnyValueMap

    // Add user_id if available
    const userId = getOrCreateUserID()
    if (userId) {
      attributes.user_id = userId
    }

    // Debug logging when debug mode is enabled
    if (isInternalBuild()) {
      logForDebugging(
        `[NOUMENA-ONLY] 1P event: ${eventName} ${jsonStringify(metadata, null, 0)}`,
      )
    }

    // Emit log record
    firstPartyEventLogger.emit({
      body: eventName,
      attributes,
    })
  } catch (e) {
    if (process.env.NODE_ENV === 'development') {
      throw e
    }
    if (isInternalBuild()) {
      logError(e as Error)
    }
    // swallow
  }
}

/**
 * Log a 1st-party event for internal analytics.