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

import { RabbitSubscribe } from '@golevelup/nestjs-rabbitmq';
import { Controller } from '@nestjs/common';
import { Ad } from '../../domain/entities/ad';
import { InjectMapper } from '@automapper/nestjs';
import { Mapper } from '@automapper/core';
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 { GeoTimezoneFinder } from 'src/modules/geography/adapters/secondaries/geo-timezone-finder';

@Controller()
export class AdMessagerController {
  constructor(
    private readonly messager: Messager,
    private readonly commandBus: CommandBus,
    @InjectMapper() private readonly mapper: Mapper,
    private readonly timezoneFinder: GeoTimezoneFinder,
  ) {}

  @RabbitSubscribe({
    name: 'adCreated',
  })
  async adCreatedHandler(message: string): Promise<void> {
    let createAdRequest: CreateAdRequest;
    try {
      // parse message to conform to CreateAdRequest (not a real instance yet)
      const parsedMessage: CreateAdRequest = JSON.parse(message);
      // create a real instance of CreateAdRequest from parsed message
      createAdRequest = this.mapper.map(
        parsedMessage,
        CreateAdRequest,
        CreateAdRequest,
      );
      // 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;
        }
      }
      createAdRequest.timezone = this.timezoneFinder.timezones(
        createAdRequest.waypoints[0].lon,
        createAdRequest.waypoints[0].lat,
      )[0];
      const ad: Ad = await this.commandBus.execute(
        new CreateAdCommand(createAdRequest),
      );
      console.log(ad);
    } catch (e) {
      this.messager.publish(
        'logging.matcher.ad.crit',
        JSON.stringify({
          createAdRequest,
          error: e,
        }),
      );
    }
  }
}