matcher/src/modules/ad/adapters/primaries/ad-messager.controller.ts

import { RabbitSubscribe } from '@golevelup/nestjs-rabbitmq';
import { Controller } from '@nestjs/common';
import { CommandBus } from '@nestjs/cqrs';
import { CreateAdCommand } from '../../commands/create-ad.command';
import { CreateAdRequest } from '../../domain/dtos/create-ad.request';
import { validateOrReject } from 'class-validator';
import { Messager } from '../secondaries/messager';
import { plainToInstance } from 'class-transformer';

@Controller()
export class AdMessagerController {
  constructor(
    private readonly messager: Messager,
    private readonly commandBus: CommandBus,
  ) {}

  @RabbitSubscribe({
    name: 'adCreated',
  })
  async adCreatedHandler(message: string): Promise<void> {
    try {
      // parse message to request instance
      const createAdRequest: CreateAdRequest = plainToInstance(
        CreateAdRequest,
        JSON.parse(message),
      );
      // validate instance
      await validateOrReject(createAdRequest);
      // validate nested objects (fixes direct nested validation bug)
      for (const waypoint of createAdRequest.waypoints) {
        try {
          await validateOrReject(waypoint);
        } catch (e) {
          throw e;
        }
      }
      await this.commandBus.execute(new CreateAdCommand(createAdRequest));
    } catch (e) {
      this.messager.publish(
        'logging.matcher.ad.crit',
        JSON.stringify({
          message,
          error: e,
        }),
      );
    }
  }
}