/*
* Copyright Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.android.gms.samples.wallet;
import com.google.android.gms.wallet.Cart;
import com.google.android.gms.wallet.FullWalletRequest;
import com.google.android.gms.wallet.LineItem;
import com.google.android.gms.wallet.MaskedWalletRequest;
import com.google.android.gms.wallet.NotifyTransactionStatusRequest;
import com.google.android.gms.wallet.PaymentMethodTokenizationParameters;
import com.google.android.gms.wallet.PaymentMethodTokenizationType;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.ArrayList;
import java.util.List;
/**
* A helper class to create {@link MaskedWalletRequest}, {@link FullWalletRequest} as well as
* {@link NotifyTransactionStatusRequest} objects
*/
public class WalletUtil {
private static final BigDecimal MICROS = new BigDecimal(1000000d);
private WalletUtil() {}
/**
* Creates a MaskedWalletRequest for direct merchant integration (no payment processor)
*
* @param itemInfo {@link com.google.android.gms.samples.wallet.ItemInfo} containing details
* of an item.
* @param publicKey base64-encoded public encryption key. See instructions for more details.
* @return {@link MaskedWalletRequest} instance
*/
public static MaskedWalletRequest createMaskedWalletRequest(ItemInfo itemInfo,
String publicKey) {
// Validate the public key
if (publicKey == null || publicKey.contains("REPLACE_ME")) {
throw new IllegalArgumentException("Invalid public key, see README for instructions.");
}
// Create direct integration parameters
// [START direct_integration_parameters]
PaymentMethodTokenizationParameters parameters =
PaymentMethodTokenizationParameters.newBuilder()
.setPaymentMethodTokenizationType(PaymentMethodTokenizationType.NETWORK_TOKEN)
.addParameter("publicKey", publicKey)
.build();
// [END direct_integration_parameters]
return createMaskedWalletRequest(itemInfo, parameters);
}
/**
* Creates a MaskedWalletRequest for processing payments with Stripe
*
* @param itemInfo {@link com.google.android.gms.samples.wallet.ItemInfo} containing details
* of an item.
* @param publishableKey Stripe publishable key.
* @param version Stripe API version.
* @return {@link MaskedWalletRequest} instance
*/
public static MaskedWalletRequest createStripeMaskedWalletRequest(ItemInfo itemInfo,
String publishableKey,
String version) {
// Validate Stripe configuration
if ("REPLACE_ME".equals(publishableKey) || "REPLACE_ME".equals(version)) {
throw new IllegalArgumentException("Invalid Stripe configuration, see README for instructions.");
}
// [START stripe_integration_parameters]
PaymentMethodTokenizationParameters parameters = PaymentMethodTokenizationParameters.newBuilder()
.setPaymentMethodTokenizationType(PaymentMethodTokenizationType.PAYMENT_GATEWAY)
.addParameter("gateway", "stripe")
.addParameter("stripe:publishableKey", publishableKey)
.addParameter("stripe:version", version)
.build();
// [END stripe_integration_parameters]
return createMaskedWalletRequest(itemInfo, parameters);
}
private static MaskedWalletRequest createMaskedWalletRequest(ItemInfo itemInfo,
PaymentMethodTokenizationParameters parameters) {
// Build a List of all line items
List<LineItem> lineItems = buildLineItems(itemInfo, true);
// Calculate the cart total by iterating over the line items.
String cartTotal = calculateCartTotal(lineItems);
// [START masked_wallet_request]
MaskedWalletRequest request = MaskedWalletRequest.newBuilder()
.setMerchantName(Constants.MERCHANT_NAME)
.setPhoneNumberRequired(true)
.setShippingAddressRequired(true)
.setCurrencyCode(Constants.CURRENCY_CODE_USD)
.setEstimatedTotalPrice(cartTotal)
// Create a Cart with the current line items. Provide all the information
// available up to this point with estimates for shipping and tax included.
.setCart(Cart.newBuilder()
.setCurrencyCode(Constants.CURRENCY_CODE_USD)
.setTotalPrice(cartTotal)
.setLineItems(lineItems)
.build())
.setPaymentMethodTokenizationParameters(parameters)
.build();
return request;
// [END masked_wallet_request]
}
/**
* Build a list of line items based on the {@link ItemInfo} and a boolean that indicates
* whether to use estimated values of tax and shipping for setting up the
* {@link MaskedWalletRequest} or actual values in the case of a {@link FullWalletRequest}
*
* @param itemInfo {@link com.google.android.gms.samples.wallet.ItemInfo} used for building the
* {@link com.google.android.gms.wallet.LineItem} list.
* @param isEstimate {@code boolean} that indicates whether to use estimated values for
* shipping and tax values.
* @return list of line items
*/
private static List<LineItem> buildLineItems(ItemInfo itemInfo, boolean isEstimate) {
List<LineItem> list = new ArrayList<LineItem>();
String itemPrice = toDollars(itemInfo.priceMicros);
list.add(LineItem.newBuilder()
.setCurrencyCode(Constants.CURRENCY_CODE_USD)
.setDescription(itemInfo.name)
.setQuantity("1")
.setUnitPrice(itemPrice)
.setTotalPrice(itemPrice)
.build());
String shippingPrice = toDollars(
isEstimate ? itemInfo.estimatedShippingPriceMicros : itemInfo.shippingPriceMicros);
list.add(LineItem.newBuilder()
.setCurrencyCode(Constants.CURRENCY_CODE_USD)
.setDescription(Constants.DESCRIPTION_LINE_ITEM_SHIPPING)
.setRole(LineItem.Role.SHIPPING)
.setTotalPrice(shippingPrice)
.build());
String tax = toDollars(
isEstimate ? itemInfo.estimatedTaxMicros : itemInfo.taxMicros);
list.add(LineItem.newBuilder()
.setCurrencyCode(Constants.CURRENCY_CODE_USD)
.setDescription(Constants.DESCRIPTION_LINE_ITEM_TAX)
.setRole(LineItem.Role.TAX)
.setTotalPrice(tax)
.build());
return list;
}
/**
*
* @param lineItems List of {@link com.google.android.gms.wallet.LineItem} used for calculating
* the cart total.
* @return cart total.
*/
private static String calculateCartTotal(List<LineItem> lineItems) {
BigDecimal cartTotal = BigDecimal.ZERO;
// Calculate the total price by adding up each of the line items
for (LineItem lineItem: lineItems) {
BigDecimal lineItemTotal = lineItem.getTotalPrice() == null ?
new BigDecimal(lineItem.getUnitPrice())
.multiply(new BigDecimal(lineItem.getQuantity())) :
new BigDecimal(lineItem.getTotalPrice());
cartTotal = cartTotal.add(lineItemTotal);
}
return cartTotal.setScale(2, RoundingMode.HALF_EVEN).toString();
}
/**
*
* @param itemInfo {@link com.google.android.gms.samples.wallet.ItemInfo} to use for creating
* the {@link com.google.android.gms.wallet.FullWalletRequest}
* @param googleTransactionId
* @return {@link FullWalletRequest} instance
*/
public static FullWalletRequest createFullWalletRequest(ItemInfo itemInfo,
String googleTransactionId) {
List<LineItem> lineItems = buildLineItems(itemInfo, false);
String cartTotal = calculateCartTotal(lineItems);
// [START full_wallet_request]
FullWalletRequest request = FullWalletRequest.newBuilder()
.setGoogleTransactionId(googleTransactionId)
.setCart(Cart.newBuilder()
.setCurrencyCode(Constants.CURRENCY_CODE_USD)
.setTotalPrice(cartTotal)
.setLineItems(lineItems)
.build())
.build();
// [END full_wallet_request]
return request;
}
/**
* @param googleTransactionId
* @param status from {@link NotifyTransactionStatusRequest.Status} which could either be
* {@code NotifyTransactionStatusRequest.Status.SUCCESS} or one of the error codes
* from {@link NotifyTransactionStatusRequest.Status.Error}
* @return {@link NotifyTransactionStatusRequest} instance
*/
@SuppressWarnings("javadoc")
public static NotifyTransactionStatusRequest createNotifyTransactionStatusRequest(
String googleTransactionId, int status) {
return NotifyTransactionStatusRequest.newBuilder()
.setGoogleTransactionId(googleTransactionId)
.setStatus(status)
.build();
}
/**
* @param micros Amount micros
* @return string formatted as "0.00" required by the Instant Buy API.
*/
private static String toDollars(long micros) {
return new BigDecimal(micros).divide(MICROS)
.setScale(2, RoundingMode.HALF_EVEN).toString();
}
}
