package org.multibit.mbm.client.interfaces.rest.handlers.cart;
import com.google.common.base.Preconditions;
import com.theoryinpractise.halbuilder.api.ReadableRepresentation;
import org.multibit.mbm.client.HalHmacResourceFactory;
import org.multibit.mbm.client.interfaces.rest.handlers.BaseHandler;
import org.multibit.mbm.client.interfaces.rest.api.cart.CartDto;
import org.multibit.mbm.client.interfaces.rest.api.cart.CartItemDto;
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.user.UserDto;
import javax.ws.rs.core.MediaType;
import java.util.Collection;
import java.util.List;
import java.util.Locale;
import java.util.Map;
/**
* <p>Handler to provide the following to {@link org.multibit.mbm.client.PublicMerchantClient}:</p>
* <ul>
* <li>Construction of public cart requests</li>
* </ul>
*
* @since 0.0.1
*
*/
public class ClientCartHandler extends BaseHandler {
/**
* @param locale The locale providing i18n information
*/
public ClientCartHandler(Locale locale) {
super(locale);
}
/**
* Retrieve the user's own cart as a summary
*
* @param clientUser The authenticated client user
*
* @return A matching {@link org.multibit.mbm.client.interfaces.rest.api.item.ItemDto}
*/
public CartDto retrieveCartNoItems(UserDto clientUser) {
// Sanity check
Preconditions.checkNotNull(clientUser);
Preconditions.checkNotNull(clientUser.getApiKey());
Preconditions.checkNotNull(clientUser.getSecretKey());
// TODO Replace "magic string" with auto-discover based on link rel
String path = String.format("/cart");
String hal = HalHmacResourceFactory.INSTANCE
.newUserResource(locale, path, clientUser)
.get(String.class);
// Read the HAL
ReadableRepresentation rr = unmarshalHal(hal);
Map<String, Object> properties = rr.getProperties();
return buildClientCartNoItems(properties);
}
/**
* Retrieve the user's own cart
*
* @param clientUser The authenticated client user
*
* @return A matching {@link org.multibit.mbm.client.interfaces.rest.api.item.ItemDto}
*/
public CartDto retrieveCart(UserDto clientUser) {
// Sanity check
Preconditions.checkNotNull(clientUser);
Preconditions.checkNotNull(clientUser.getApiKey());
Preconditions.checkNotNull(clientUser.getSecretKey());
// TODO Replace "magic string" with auto-discover based on link rel
String path = String.format("/cart");
String hal = HalHmacResourceFactory.INSTANCE
.newUserResource(locale, path, clientUser)
.get(String.class);
// Read the HAL
ReadableRepresentation rr = unmarshalHal(hal);
Map<String, Object> properties = rr.getProperties();
return buildClientCart(rr, properties);
}
/**
* Update the cart items
*
* @param clientUser The authenticated client user
*
* @return A matching {@link org.multibit.mbm.client.interfaces.rest.api.item.ItemDto}
*/
public CartDto updateCartItems(UserDto clientUser, List<PublicCartItemDto> cartItems) {
// Sanity check
Preconditions.checkNotNull(clientUser);
Preconditions.checkNotNull(clientUser.getApiKey());
Preconditions.checkNotNull(clientUser.getSecretKey());
// TODO Replace "magic string" with auto-discover based on link rel
String path = String.format("/cart");
UpdateCartDto updateCartRequest = new UpdateCartDto();
updateCartRequest.setCartItems(cartItems);
String hal = HalHmacResourceFactory.INSTANCE
.newUserResource(locale, path, clientUser)
.entity(updateCartRequest, MediaType.APPLICATION_JSON_TYPE)
.put(String.class);
// Read the HAL
ReadableRepresentation rr = unmarshalHal(hal);
Map<String, Object> properties = rr.getProperties();
return buildClientCart(rr, properties);
}
/**
* @param properties The HAL representation properties
*
* @return A ClientCart with all items populated
*/
private CartDto buildClientCart(ReadableRepresentation rr, Map<String, Object> properties) {
// Build the basic cart
CartDto clientCart = buildClientCartNoItems(properties);
// Read the cart items
Collection<Map.Entry<String,ReadableRepresentation>> cartitemRepresentations = rr.getResources();
for (Map.Entry<String, ReadableRepresentation> cartItemRepresentation : cartitemRepresentations) {
CartItemDto cartItem = buildClientCartItem(cartItemRepresentation.getValue().getProperties());
// Extract the embedded item
Preconditions.checkArgument(cartItemRepresentation.getValue().getResources().size()==1);
// TODO Fix or replace this
//Representation itemRepresentation = cartItemRepresentation.getValue().getResources().iterator().next().getValue();
//List<Link> links = itemRepresentation.getLinks();
//cartItem.setItem(ClientItemHandler.buildClientItem(itemRepresentation.getProperties(), links));
clientCart.getCartItems().add(cartItem);
}
return clientCart;
}
private CartItemDto buildClientCartItem(Map<String, Object> properties) {
CartItemDto cartItem = new CartItemDto();
Integer index = getMandatoryPropertyAsInteger("index",properties);
Integer quantity = getMandatoryPropertyAsInteger("quantity", properties);
String priceSubtotal = getMandatoryPropertyAsString("price_subtotal", properties);
String taxSubtotal = getMandatoryPropertyAsString("tax_subtotal", properties);
String cartItemSubtotal = getMandatoryPropertyAsString("cart_item_subtotal", properties);
cartItem.setIndex(index);
cartItem.setQuantity(quantity);
cartItem.setPriceSubtotal(priceSubtotal);
cartItem.setTaxSubtotal(taxSubtotal);
cartItem.setCartItemSubtotal(cartItemSubtotal);
return cartItem;
}
/**
*
* @param properties The HAL representation properties
*
* @return A ClientCart with no items populated
*/
public static CartDto buildClientCartNoItems(Map<String, Object> properties) {
CartDto cart = new CartDto();
cart.setCurrencySymbol(getMandatoryPropertyAsString("currency_symbol", properties));
cart.setCurrencyCode(getMandatoryPropertyAsString("currency_code", properties));
cart.setPriceTotal(getMandatoryPropertyAsString("price_total", properties));
cart.setItemTotal(getMandatoryPropertyAsString("item_total", properties));
cart.setQuantityTotal(getMandatoryPropertyAsString("quantity_total", properties));
return cart;
}
}