swt23w23/src/main/java/catering/inventory/ConsumableMutateForm.java

/*
 * Copyright (C) 2023 Simon Bruder
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
package catering.inventory;

import static org.salespointframework.core.Currencies.EURO;

import java.util.Optional;

import javax.money.MonetaryAmount;
import javax.money.NumberValue;

import org.javamoney.moneta.Money;
import org.salespointframework.catalog.Product;
import org.salespointframework.inventory.UniqueInventoryItem;

import catering.catalog.Consumable;
import jakarta.validation.constraints.NotNull;
import jakarta.validation.constraints.PositiveOrZero; // NonNegative in enterprise java

class ConsumableMutateForm extends InventoryMutateForm {
	private @NotNull @PositiveOrZero Double wholesalePrice;
	private @NotNull Optional<@PositiveOrZero Double> promotionPrice = Optional.empty();

	public Double getWholesalePrice() {
		return wholesalePrice;
	}

	public Optional<Double> getPromotionPrice() {
		return promotionPrice;
	}

	public void setWholesalePrice(Double wholesalePrice) {
		this.wholesalePrice = wholesalePrice;
	}

	public void setPromotionPrice(Optional<Double> promotionPrice) {
		this.promotionPrice = promotionPrice;
	}

	@Override
	public Product toProduct() {
		return new Consumable(
				getName(),
				Money.of(getRetailPrice(), EURO),
				Money.of(getWholesalePrice(), EURO),
				getPromotionPrice().map(price -> Money.of(price, EURO)),
				getOrderTypes());
	}

	public static ConsumableMutateForm of(Consumable product, UniqueInventoryItem item) {
		ConsumableMutateForm form = new ConsumableMutateForm();
		form.setName(product.getName());
		form.setQuantity(item.getQuantity());
		form.setOrderTypes(orderTypesFromCategories(product.getCategories()));
		form.setWholesalePrice(product.getWholesalePrice().getNumber().doubleValueExact());
		form.setRetailPrice(product.getRetailPrice().getNumber().doubleValueExact());
		form.setPromotionPrice(
				product.getPromotionPrice().map(MonetaryAmount::getNumber).map(NumberValue::doubleValueExact));
		return form;
	}

	@Override
	protected void modifyProductPrimitive(Product product) {
		if (product instanceof Consumable consumable) {
			consumable.setWholesalePrice(Money.of(getWholesalePrice(), EURO));
			consumable.setPromotionPrice(getPromotionPrice().map(price -> Money.of(price, EURO)));
		} else {
			throw new IllegalArgumentException("ConsumableMutateForm can only modify instances of Consumable");
		}
	}
}