package org.multibit.mbm.client.interfaces.rest.resources.cart;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.theoryinpractise.halbuilder.api.Representation;
import com.yammer.dropwizard.jersey.caching.CacheControl;
import com.yammer.metrics.annotation.Timed;
import org.multibit.mbm.client.domain.model.model.Cart;
import org.multibit.mbm.client.domain.model.model.Item;
import org.multibit.mbm.client.domain.model.model.User;
import org.multibit.mbm.client.domain.repositories.CartReadService;
import org.multibit.mbm.client.domain.repositories.ItemReadService;
import org.multibit.mbm.client.interfaces.rest.api.cart.PublicCartItemDto;
import org.multibit.mbm.client.interfaces.rest.api.cart.UpdateCartDto;
import org.multibit.mbm.client.interfaces.rest.api.hal.HalMediaType;
import org.multibit.mbm.client.interfaces.rest.api.representations.hal.cart.PublicCartRepresentation;
import org.multibit.mbm.client.interfaces.rest.auth.Authority;
import org.multibit.mbm.client.interfaces.rest.auth.annotation.RestrictedTo;
import org.multibit.mbm.client.interfaces.rest.common.ResourceAsserts;
import org.multibit.mbm.client.interfaces.rest.links.cart.CartLinks;
import org.multibit.mbm.client.interfaces.rest.resources.BaseResource;
import org.springframework.stereotype.Component;
import javax.annotation.Resource;
import javax.ws.rs.GET;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Response;
import java.util.concurrent.TimeUnit;
/**
* <p>Resource to provide the following to {@link org.multibit.mbm.client.domain.model.model.Cart}:</p>
* <ul>
* <li>Provision of REST endpoints for public interaction with their Cart</li>
* </ul>
* <p>Note that a Cart has a 1:1 relationship with Customer and is meaningless
* without it. Therefore there is no "Create" or "Delete" requirement.</p>
*
* @since 0.0.1
*
*/
@Component
@Path(CartLinks.PUBLIC_SELF_TEMPLATE)
@Produces({HalMediaType.APPLICATION_HAL_JSON, HalMediaType.APPLICATION_HAL_XML})
public class PublicCartResource extends BaseResource {
@Resource(name="hibernateCartDao")
CartReadService cartDao;
@Resource(name="hibernateItemDao")
ItemReadService itemReadService;
/**
* Provides this Customer's Cart
*
* @param publicUser A public User
*
* @return A response containing the Customer Cart
*/
@GET
@Timed
@CacheControl(maxAge = 6, maxAgeUnit = TimeUnit.HOURS)
public Response retrieveOwnCart(
@RestrictedTo({Authority.ROLE_PUBLIC})
User publicUser) {
// Validation
Preconditions.checkNotNull(publicUser.getCustomer(), "customer");
Cart cart = publicUser.getCustomer().getCart();
Representation representation = new PublicCartRepresentation().get(cart);
return ok(representation);
}
/**
* Update an existing Cart with the populated fields
*
* @param publicUser A cart with administrator rights
*
* @return A response containing the full details of the updated entity
*/
@PUT
@Timed
public Response update(
@RestrictedTo({Authority.ROLE_PUBLIC})
User publicUser,
UpdateCartDto updateCartRequest) {
// Retrieve the cart
Cart cart = publicUser.getCustomer().getCart();
// Verify and apply any changes to the Cart
apply(updateCartRequest,cart);
// Persist the updated cart
cart = cartDao.saveOrUpdate(cart);
// Provide a representation to the client
Representation representation = new PublicCartRepresentation().get(cart);
return ok(representation);
}
/**
* TODO Refactor into a common handler
* @param updateRequest The update request containing the changes
* @param entity The entity to which these changes will be applied
*/
private void apply(UpdateCartDto updateRequest, Cart entity) {
for (PublicCartItemDto customerCartItem : updateRequest.getCartItems()) {
Preconditions.checkNotNull(customerCartItem.getSKU(), "sku");
ResourceAsserts.assertPositive(customerCartItem.getQuantity(), "quantity");
Optional<Item> item = itemReadService.getBySKU(customerCartItem.getSKU());
ResourceAsserts.assertPresent(item,"item");
entity.setItemQuantity(item.get(),customerCartItem.getQuantity());
}
}
public void setCartDao(CartReadService cartDao) {
this.cartDao = cartDao;
}
public void setItemReadService(ItemReadService itemReadService) {
this.itemReadService = itemReadService;
}
}