fairnesscoop / pictyschool

import { CommandHandler } from '@nestjs/cqrs';

import { Inject } from '@nestjs/common';

import { UpdateShippingCostCommand } from './UpdateShippingCostCommand';

import { IShippingCostRepository } from 'src/Domain/Order/Repository/IShippingCostRepository';

import { ShippingCostNotFoundException } from 'src/Domain/Order/Exception/ShippingCostNotFoundException';

import { IsShippingCostAlreadyExist } from 'src/Domain/Order/Specification/IsShippingCostAlreadyExist';

import { ShippingCostAlreadyExistException } from 'src/Domain/Order/Exception/ShippingCostAlreadyExistException';

@CommandHandler(UpdateShippingCostCommand)

export class UpdateShippingCostCommandHandler {

  constructor(

    @Inject('IShippingCostRepository')

    private readonly shippingcostRepository: IShippingCostRepository,

    private readonly isShippingCostAlreadyExist: IsShippingCostAlreadyExist

  ) {}

  public async execute(command: UpdateShippingCostCommand): Promise<string> {

    const { id, grams, price } = command;

    const shippingCost = await this.shippingcostRepository.findOneById(id);

    if (!shippingCost) {

      throw new ShippingCostNotFoundException();

    }

    if (

      grams !== shippingCost.getGrams() &&

      true === (await this.isShippingCostAlreadyExist.isSatisfiedBy(grams))

    ) {

      throw new ShippingCostAlreadyExistException();

    }

    shippingCost.update(grams, Math.round(price * 100));

    await this.shippingcostRepository.save(shippingCost);

    return shippingCost.getId();

  }

}