startover/packages/infrastructure/src/event-log.ts

import type { Prisma } from '@prisma/client';
import { randomUUID } from 'node:crypto';

type TxClient = Prisma.TransactionClient;

export interface RecordEventInput {
  readonly aggregateType: string;
  readonly aggregateId: string;
  readonly eventName: string;
  readonly eventVersion: number;
  readonly payloadJson: Record<string, unknown>;
  readonly actorUserId?: bigint;
  readonly causationId?: string;
  readonly correlationId?: string;
  readonly piiLevel?: 'NONE' | 'LOW' | 'HIGH';
  readonly occurredAt?: Date;
}

export async function recordEvent(tx: TxClient, input: RecordEventInput) {
  const eventKey = `${input.aggregateType}:${input.aggregateId}:${input.eventName}:${randomUUID()}`;

  return tx.eventLog.create({
    data: {
      aggregateType: input.aggregateType,
      aggregateId: input.aggregateId,
      eventName: input.eventName,
      eventVersion: input.eventVersion,
      eventKey,
      payloadJson: input.payloadJson as object,
      actorUserId: input.actorUserId ?? null,
      causationId: input.causationId ?? null,
      correlationId: input.correlationId ?? null,
      piiLevel: input.piiLevel ?? 'NONE',
      occurredAt: input.occurredAt ?? new Date(),
    },
  });
}