/*

* Copyright 2022 Google Inc.

*

* 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.

*/

// [START setup]

// [START imports]

import com.auth0.jwt.JWT;

import com.auth0.jwt.algorithms.Algorithm;

import com.google.api.client.googleapis.batch.BatchRequest;

import com.google.api.client.googleapis.batch.json.JsonBatchCallback;

import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;

import com.google.api.client.googleapis.json.GoogleJsonError;

import com.google.api.client.googleapis.json.GoogleJsonResponseException;

import com.google.api.client.http.*;

import com.google.api.client.json.gson.GsonFactory;

import com.google.api.services.walletobjects.Walletobjects;

import com.google.api.services.walletobjects.model.*;

import com.google.auth.http.HttpCredentialsAdapter;

import com.google.auth.oauth2.GoogleCredentials;

import com.google.auth.oauth2.ServiceAccountCredentials;

import java.io.*;

import java.security.interfaces.RSAPrivateKey;

import java.util.*;

// [END imports]

/** Demo class for creating and managing Gift cards in Google Wallet. */

public class DemoGiftCard {

/**

* Path to service account key file from Google Cloud Console. Environment variable:

* GOOGLE_APPLICATION_CREDENTIALS.

*/

public static String keyFilePath;

/** Service account credentials for Google Wallet APIs. */

public static GoogleCredentials credentials;

/** Google Wallet service client. */

public static Walletobjects service;

public DemoGiftCard() {

keyFilePath =

System.getenv().getOrDefault("GOOGLE_APPLICATION_CREDENTIALS", "/path/to/key.json");

}

// [END setup]

// [START auth]

/**

* Create authenticated HTTP client using a service account file.

*

* @throws Exception

*/

public void Auth() throws Exception {

String scope = "https://www.googleapis.com/auth/wallet_object.issuer";

credentials =

GoogleCredentials.fromStream(new FileInputStream(keyFilePath))

.createScoped(Arrays.asList(scope));

credentials.refresh();

HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();

service =

new Walletobjects.Builder(

httpTransport,

GsonFactory.getDefaultInstance(),

new HttpCredentialsAdapter(credentials))

.setApplicationName("APPLICATION_NAME")

.build();

}

// [END auth]

// [START class]

/**

* Create a class via the API. This can also be done in the Google Pay and Wallet console.

*

* @param issuerId The issuer ID being used for this request.

* @param classSuffix Developer-defined unique ID for this pass class.

* @return The pass class ID: "{issuerId}.{classSuffix}"

* @throws IOException

*/

public String CreateGiftCardClass(String issuerId, String classSuffix) throws IOException {

// See link below for more information on required properties

// https://developers.google.com/wallet/retail/gift-cards/rest/v1/giftcardclass

GiftCardClass giftCardClass =

new GiftCardClass()

.setId(String.format("%s.%s", issuerId, classSuffix))

.setIssuerName("Issuer name")

.setReviewStatus("UNDER_REVIEW");

try {

GiftCardClass response = service.giftcardclass().insert(giftCardClass).execute();

System.out.println("Class insert response");

System.out.println(response.toPrettyString());

return response.getId();

} catch (GoogleJsonResponseException ex) {

if (ex.getStatusCode() == 409) {

System.out.println(String.format("Class %s.%s already exists", issuerId, classSuffix));

return String.format("%s.%s", issuerId, classSuffix);

}

// Something else went wrong

ex.printStackTrace();

return ex.getMessage();

}

}

// [END class]

// [START object]

/**

* Create an object via the API.

*

* @param issuerId The issuer ID being used for this request.

* @param classSuffix Developer-defined unique ID for this pass class.

* @param userId Developer-defined user ID for this object.

* @return The pass object ID: "{issuerId}.{userId}"

* @throws IOException

*/

public String CreateGiftCardObject(String issuerId, String classSuffix, String userId)

throws IOException {

// Generate the object ID

// Should only include alphanumeric characters, '.', '_', or '-'

String newUserId = userId.replaceAll("[^\\w.-]", "_");

String objectId = String.format("%s.%s", issuerId, newUserId);

try {

// Check if the object exists

GiftCardObject response = service.giftcardobject().get(objectId).execute();

System.out.println("Object get response");

System.out.println(response.toPrettyString());

return response.getId();

} catch (GoogleJsonResponseException ex) {

if (ex.getStatusCode() != 404) {

// Something else went wrong

ex.printStackTrace();

return ex.getMessage();

}

}

// Object doesn't exist, create it now

// See link below for more information on required properties

// https://developers.google.com/wallet/retail/gift-cards/rest/v1/giftcardobject

GiftCardObject giftCardObject =

new GiftCardObject()

.setId(objectId)

.setClassId(String.format("%s.%s", issuerId, classSuffix))

.setState("ACTIVE")

.setHeroImage(

new Image()

.setSourceUri(

new ImageUri()

.setUri(

"https://farm4.staticflickr.com/3723/11177041115_6e6a3b6f49_o.jpg"))

.setContentDescription(

new LocalizedString()

.setDefaultValue(

new TranslatedString()

.setLanguage("en-US")

.setValue("Hero image description"))))

.setTextModulesData(

Arrays.asList(

new TextModuleData()

.setHeader("Text module header")

.setBody("Text module body")

.setId("TEXT_MODULE_ID")))

.setLinksModuleData(

new LinksModuleData()

.setUris(

Arrays.asList(

new Uri()

.setUri("http://maps.google.com/")

.setDescription("Link module URI description")

.setId("LINK_MODULE_URI_ID"),

new Uri()

.setUri("tel:6505555555")

.setDescription("Link module tel description")

.setId("LINK_MODULE_TEL_ID"))))

.setImageModulesData(

Arrays.asList(

new ImageModuleData()

.setMainImage(

new Image()

.setSourceUri(

new ImageUri()

.setUri(

"http://farm4.staticflickr.com/3738/12440799783_3dc3c20606_b.jpg"))

.setContentDescription(

new LocalizedString()

.setDefaultValue(

new TranslatedString()

.setLanguage("en-US")

.setValue("Image module description"))))

.setId("IMAGE_MODULE_ID")))

.setBarcode(new Barcode().setType("QR_CODE").setValue("QR code value"))

.setLocations(

Arrays.asList(

new LatLongPoint()

.setLatitude(37.424015499999996)

.setLongitude(-122.09259560000001)))

.setCardNumber("Card number")

.setPin("1234")

.setBalance(new Money().setMicros(20000000L).setCurrencyCode("USD"))

.setBalanceUpdateTime(new DateTime().setDate("2020-04-12T16:20:50.52-04:00"));

GiftCardObject response = service.giftcardobject().insert(giftCardObject).execute();

System.out.println("Object insert response");

System.out.println(response.toPrettyString());

return response.getId();

}

// [END object]

// [START jwt]

/**

* Generate a signed JWT that creates a new pass class and object.

*

* <p>When the user opens the "Add to Google Wallet" URL and saves the pass to their wallet, the

* pass class and object defined in the JWT are created. This allows you to create multiple pass

* classes and objects in one API call when the user saves the pass to their wallet.

*

* @param issuerId The issuer ID being used for this request.

* @param classSuffix Developer-defined unique ID for this pass class.

* @param userId Developer-defined user ID for this object.

* @return An "Add to Google Wallet" link.

*/

public String CreateJWTSaveURL(String issuerId, String classSuffix, String userId) {

// Generate the object ID

// Should only include alphanumeric characters, '.', '_', or '-'

String newUserId = userId.replaceAll("[^\\w.-]", "_");

String objectId = String.format("%s.%s", issuerId, newUserId);

// See link below for more information on required properties

// https://developers.google.com/wallet/retail/gift-cards/rest/v1/giftcardclass

GiftCardClass giftCardClass =

new GiftCardClass()

.setId(String.format("%s.%s", issuerId, classSuffix))

.setIssuerName("Issuer name")

.setReviewStatus("UNDER_REVIEW");

// See link below for more information on required properties

// https://developers.google.com/wallet/retail/gift-cards/rest/v1/giftcardobject

GiftCardObject giftCardObject =

new GiftCardObject()

.setId(objectId)

.setClassId(String.format("%s.%s", issuerId, classSuffix))

.setState("ACTIVE")

.setHeroImage(

new Image()

.setSourceUri(

new ImageUri()

.setUri(

"https://farm4.staticflickr.com/3723/11177041115_6e6a3b6f49_o.jpg"))

.setContentDescription(

new LocalizedString()

.setDefaultValue(

new TranslatedString()

.setLanguage("en-US")

.setValue("Hero image description"))))

.setTextModulesData(

Arrays.asList(

new TextModuleData()

.setHeader("Text module header")

.setBody("Text module body")

.setId("TEXT_MODULE_ID")))

.setLinksModuleData(

new LinksModuleData()

.setUris(

Arrays.asList(

new Uri()

.setUri("http://maps.google.com/")

.setDescription("Link module URI description")

.setId("LINK_MODULE_URI_ID"),

new Uri()

.setUri("tel:6505555555")

.setDescription("Link module tel description")

.setId("LINK_MODULE_TEL_ID"))))

.setImageModulesData(

Arrays.asList(

new ImageModuleData()

.setMainImage(

new Image()

.setSourceUri(

new ImageUri()

.setUri(

"http://farm4.staticflickr.com/3738/12440799783_3dc3c20606_b.jpg"))

.setContentDescription(

new LocalizedString()

.setDefaultValue(

new TranslatedString()

.setLanguage("en-US")

.setValue("Image module description"))))

.setId("IMAGE_MODULE_ID")))

.setBarcode(new Barcode().setType("QR_CODE").setValue("QR code value"))

.setLocations(

Arrays.asList(

new LatLongPoint()

.setLatitude(37.424015499999996)

.setLongitude(-122.09259560000001)))

.setCardNumber("Card number")

.setPin("1234")

.setBalance(new Money().setMicros(20000000L).setCurrencyCode("USD"))

.setBalanceUpdateTime(new DateTime().setDate("2020-04-12T16:20:50.52-04:00"));

// Create the JWT as a HashMap object

HashMap<String, Object> claims = new HashMap<String, Object>();

claims.put("iss", ((ServiceAccountCredentials) credentials).getClientEmail());

claims.put("aud", "google");

claims.put("origins", Arrays.asList("www.example.com"));

claims.put("typ", "savetowallet");

// Create the Google Wallet payload and add to the JWT

HashMap<String, Object> payload = new HashMap<String, Object>();

payload.put("giftCardClasses", Arrays.asList(giftCardClass));

payload.put("giftCardObjects", Arrays.asList(giftCardObject));

claims.put("payload", payload);

// The service account credentials are used to sign the JWT

Algorithm algorithm =

Algorithm.RSA256(

null, (RSAPrivateKey) ((ServiceAccountCredentials) credentials).getPrivateKey());

String token = JWT.create().withPayload(claims).sign(algorithm);

System.out.println("Add to Google Wallet link");

System.out.println(String.format("https://pay.google.com/gp/v/save/%s", token));

return String.format("https://pay.google.com/gp/v/save/%s", token);

}

// [END jwt]

// [START createIssuer]

/**

* Create a new Google Wallet issuer account.

*

* @param issuerName The issuer's name.

* @param issuerEmail The issuer's email address.

* @throws IOException

*/

public void CreateIssuerAccount(String issuerName, String issuerEmail) throws IOException {

// New issuer information

Issuer issuer =

new Issuer()

.setName(issuerName)

.setContactInfo(new IssuerContactInfo().setEmail(issuerEmail));

Issuer response = service.issuer().insert(issuer).execute();

System.out.println("Issuer insert response");

System.out.println(response.toPrettyString());

}

// [END createIssuer]

// [START updatePermissions]

/**

* Update permissions for an existing Google Wallet issuer account. <strong>Warning:</strong> This

* operation overwrites all existing permissions!

*

* <p>Example permissions list argument below. Copy the add entry as needed for each email address

* that will need access. Supported values for role are: 'READER', 'WRITER', and 'OWNER'

*

* <pre><code>

* ArrayList<Permission> permissions = new ArrayList<Permission>();

* permissions.add(new Permission().setEmailAddress("emailAddress").setRole("OWNER"));

* </code></pre>

*

* @param issuerId The issuer ID being used for this request.

* @param permissions The list of email addresses and roles to assign.

* @throws IOException

*/

public void UpdateIssuerAccountPermissions(String issuerId, ArrayList<Permission> permissions)

throws IOException {

Permissions response =

service

.permissions()

.update(

Long.parseLong(issuerId),

new Permissions().setIssuerId(Long.parseLong(issuerId)).setPermissions(permissions))

.execute();

System.out.println("Issuer permissions update response");

System.out.println(response.toPrettyString());

}

// [END updatePermissions]

// [START batch]

/**

* Batch create Google Wallet objects from an existing class.

*

* @param issuerId The issuer ID being used for this request.

* @param classSuffix Developer-defined unique ID for this pass class.

* @throws IOException

*/

public void BatchCreateGiftCardObjects(String issuerId, String classSuffix) throws IOException {

// Create the batch request client

BatchRequest batch = service.batch(new HttpCredentialsAdapter(credentials));

// The callback will be invoked for each request in the batch

JsonBatchCallback<GiftCardObject> callback =

new JsonBatchCallback<GiftCardObject>() {

// Invoked if the request was successful

public void onSuccess(GiftCardObject response, HttpHeaders responseHeaders) {

System.out.println(response.toString());

}

// Invoked if the request failed

public void onFailure(GoogleJsonError e, HttpHeaders responseHeaders) {

System.out.println("Error Message: " + e.getMessage());

}

};

// Example: Generate three new pass objects

for (int i = 0; i < 3; i++) {

// Generate a random user ID

String userId = UUID.randomUUID().toString().replaceAll("[^\\w.-]", "_");

// Generate a random object ID with the user ID

// Should only include alphanumeric characters, '.', '_', or '-'

String objectId = String.format("%s.%s", issuerId, userId);

// See link below for more information on required properties

// https://developers.google.com/wallet/retail/gift-cards/rest/v1/giftcardobject

GiftCardObject giftCardObject =

new GiftCardObject()

.setId(objectId)

.setClassId(String.format("%s.%s", issuerId, classSuffix))

.setState("ACTIVE")

.setHeroImage(

new Image()

.setSourceUri(

new ImageUri()

.setUri(

"https://farm4.staticflickr.com/3723/11177041115_6e6a3b6f49_o.jpg"))

.setContentDescription(

new LocalizedString()

.setDefaultValue(

new TranslatedString()

.setLanguage("en-US")

.setValue("Hero image description"))))

.setTextModulesData(

Arrays.asList(

new TextModuleData()

.setHeader("Text module header")

.setBody("Text module body")

.setId("TEXT_MODULE_ID")))

.setLinksModuleData(

new LinksModuleData()

.setUris(

Arrays.asList(

new Uri()

.setUri("http://maps.google.com/")

.setDescription("Link module URI description")

.setId("LINK_MODULE_URI_ID"),

new Uri()

.setUri("tel:6505555555")

.setDescription("Link module tel description")

.setId("LINK_MODULE_TEL_ID"))))

.setImageModulesData(

Arrays.asList(

new ImageModuleData()

.setMainImage(

new Image()

.setSourceUri(

new ImageUri()

.setUri(

"http://farm4.staticflickr.com/3738/12440799783_3dc3c20606_b.jpg"))

.setContentDescription(

new LocalizedString()

.setDefaultValue(

new TranslatedString()

.setLanguage("en-US")

.setValue("Image module description"))))

.setId("IMAGE_MODULE_ID")))

.setBarcode(new Barcode().setType("QR_CODE").setValue("QR code value"))

.setLocations(

Arrays.asList(

new LatLongPoint()

.setLatitude(37.424015499999996)

.setLongitude(-122.09259560000001)))

.setCardNumber("Card number")

.setPin("1234")

.setBalance(new Money().setMicros(20000000L).setCurrencyCode("USD"))

.setBalanceUpdateTime(new DateTime().setDate("2020-04-12T16:20:50.52-04:00"));

service.giftcardobject().insert(giftCardObject).queue(batch, callback);

}

// Invoke the batch API calls

batch.execute();

}

// [END batch]

}