follow.character.handler.ts

import { EventsHandler, IEventHandler, CommandBus } from '@nestjs/cqrs';
import { FollowEvent, FollowCharacterEvent } from '../follow.event';
import { CreateNotificationCommand } from '../../../notification/commands/create.command';
import { Notification } from '../../../notification/notification.entity';
import { NOTIFICATION_TYPE } from '../../../notification/notification.constants';
import * as uuidv4 from 'uuid/v4';

@EventsHandler(FollowCharacterEvent)
export class FollowCharacterEventHandler implements IEventHandler<FollowCharacterEvent> {

  constructor(
    private commandBus: CommandBus,
  ) {
  }

  async handle(event: FollowEvent) {
    const eventUuid = uuidv4();

    const notification = new Notification();
    notification.type = NOTIFICATION_TYPE.NEW_FOLLOWER;
    notification.recipient = event.follow.followingCharacter;
    notification.senderCharacter = event.follow.follower;
    notification.eventUuid = eventUuid;
    
    this.commandBus.execute(new CreateNotificationCommand(notification))
  }
}