webvideo-transcript-summary-web-api/src/modules/summary/SummaryController.ts

import { constants } from 'http2';
import { SummaryService, SummaryServiceImpl } from './SummaryService';
import { Controller } from '../../packages/fastify-controller';

export interface SummaryController extends Controller<'summarizeVideoTranscript'> {}

export class SummaryControllerImpl implements SummaryController {
  constructor(
    private readonly summaryService: SummaryService = new SummaryServiceImpl(),
  ) {
    // noop
  }

  readonly summarizeVideoTranscript: SummaryController['summarizeVideoTranscript'] = async (request, reply) => {
    try {
      const stream = this.summaryService.createSummaryStream(request.body as string);
      reply.header('Content-Type', 'application/octet-stream');
      reply.raw.statusMessage = 'Summary Generated';
      return reply.send(stream);
    } catch (errRaw) {
      const err = errRaw as Error;
      request.server.log.error(err);
      reply.code(constants.HTTP_STATUS_INTERNAL_SERVER_ERROR)
      reply.raw.statusMessage = 'Summary Failed';
      reply.send();
    }
  };
}