matcher/src/modules/geography/route.mapper.ts

import { Mapper } from '@mobicoop/ddd-library';
import { Injectable } from '@nestjs/common';
import { RouteEntity } from './core/domain/route.entity';
import { RouteResponseDto } from './interface/dtos/route.response.dto';

/**
 * Mapper constructs objects that are used in different layers:
 * Record is an object that is stored in a database,
 * Entity is an object that is used in application domain layer,
 * and a ResponseDTO is an object returned to a user (usually as json).
 */

@Injectable()
export class RouteMapper
  implements Mapper<RouteEntity, undefined, undefined, RouteResponseDto>
{
  toResponse = (entity: RouteEntity): RouteResponseDto => {
    const response = new RouteResponseDto();
    response.distance = Math.round(entity.getProps().distance);
    response.duration = Math.round(entity.getProps().duration);
    response.fwdAzimuth = Math.round(entity.getProps().fwdAzimuth);
    response.backAzimuth = Math.round(entity.getProps().backAzimuth);
    response.distanceAzimuth = Math.round(entity.getProps().distanceAzimuth);
    response.points = entity.getProps().points;
    response.steps = entity.getProps().steps;
    return response;
  };
}