api-server/src/workers/document-import.worker.ts

import { Processor, WorkerHost } from '@nestjs/bullmq';
import { Logger } from '@nestjs/common';
import { Job } from 'bullmq';
import { QUEUE_DOCUMENT_IMPORT } from '../infrastructure/queue/queue.service';
import { DocumentImportRepository } from '../modules/document-import/document-import.repository';

@Processor(QUEUE_DOCUMENT_IMPORT)
export class DocumentImportWorker extends WorkerHost {
  private readonly logger = new Logger(DocumentImportWorker.name);

  constructor(
    private readonly repository: DocumentImportRepository,
  ) {
    super();
  }

  async process(job: Job<{ importId: string; userId: string }>) {
    this.logger.log(`Processing document import job ${job.id}, importId=${job.data.importId}`);
    await this.repository.updateStatus(job.data.importId, 'processing');

    try {
      // TODO: actual file parsing + AI knowledge generation
      await new Promise((resolve) => setTimeout(resolve, 1000));
      await this.repository.updateStatus(job.data.importId, 'completed');
      this.logger.log(`Document import job ${job.id} completed`);
    } catch (err: any) {
      this.logger.error(`Document import job ${job.id} failed: ${err.message}`);
      await this.repository.updateStatus(job.data.importId, 'failed');
      throw err;
    }
  }
}