PickupRequiredAddToCartValidator.java

package com.elasticpath.plugins.pickuprequiredaddtocartvalidator.extensions;

import java.time.LocalDate;
import java.time.temporal.ChronoUnit;
import java.util.Collection;
import java.util.Collections;

import org.apache.commons.lang3.StringUtils;
import org.pf4j.Extension;

import com.elasticpath.plugins.pickuprequiredaddtocartvalidator.PickupRequiredAddToCartValidatorPlugin;
import com.elasticpath.xpf.XPFExtensionPointEnum;
import com.elasticpath.xpf.connectivity.annontation.XPFAssignment;
import com.elasticpath.xpf.connectivity.context.XPFShoppingItemValidationContext;
import com.elasticpath.xpf.connectivity.dto.XPFStructuredErrorMessage;
import com.elasticpath.xpf.connectivity.extension.XPFExtensionPointImpl;
import com.elasticpath.xpf.connectivity.extensionpoint.ShoppingItemValidator;

/**
 * Ensure that the "pickupDate" cart item modifier is set to at least 7 days in the future if the product in the cart has the "pickupRequired"
 * attribute set to true.
 */
@SuppressWarnings("checkstyle:magicnumber")
@Extension
@XPFAssignment(extensionPoint = XPFExtensionPointEnum.VALIDATE_SHOPPING_ITEM_AT_ADD_TO_CART, priority = 100)
@XPFAssignment(extensionPoint = XPFExtensionPointEnum.VALIDATE_SHOPPING_ITEM_AT_CHECKOUT, priority = 100)
public class PickupRequiredAddToCartValidator extends XPFExtensionPointImpl implements ShoppingItemValidator {

	/**
	 * Message id for this validation.
	 */
	public static final String MESSAGE_ID = "invalid.pickup.date";

	@Override
	public Collection<XPFStructuredErrorMessage> validate(final XPFShoppingItemValidationContext xpfShoppingItemValidationContext) {
		if (xpfShoppingItemValidationContext.getShoppingItem().getProductSku().getProduct().getAttributeValueByKey("pickupRequired", null)
				.map(value -> value.getValue().equals(Boolean.TRUE)).orElse(false)) {
			PickupRequiredAddToCartValidatorPlugin.getInstance().getContext().getLogger().info("pickupRequired attribute found");
			String pickupDateString = xpfShoppingItemValidationContext.getShoppingItem().getModifierFields().get("pickupDate");
			if (StringUtils.isEmpty(pickupDateString)) {
				return Collections.singletonList(XPFStructuredErrorMessage.builder()
								.withMessageId(MESSAGE_ID)
								.withDebugMessage("pickupDate cart item modifier must be set.")
								.build());
			}
			LocalDate pickupDate = LocalDate.parse(pickupDateString);
			if (pickupDate.isBefore(LocalDate.now().plus(7, ChronoUnit.DAYS))) {
				return Collections.singletonList(XPFStructuredErrorMessage.builder()
						.withMessageId(MESSAGE_ID)
						.withDebugMessage("pickupDate cart item modifier must be set to at least one week in the future.")
						.build());
			}
		}
		return Collections.EMPTY_LIST;
	}
}