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// Copyright 2024 Google LLC
//
// 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
//
//     https://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 shopping.merchant.samples.accounts.programs.v1;
import com.google.api.gax.core.FixedCredentialsProvider;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.shopping.merchant.accounts.v1.AccountName;
import com.google.shopping.merchant.accounts.v1.ListProgramsRequest;
import com.google.shopping.merchant.accounts.v1.Program;
import com.google.shopping.merchant.accounts.v1.ProgramsServiceClient;
import com.google.shopping.merchant.accounts.v1.ProgramsServiceClient.ListProgramsPagedResponse;
import com.google.shopping.merchant.accounts.v1.ProgramsServiceSettings;
import shopping.merchant.samples.utils.Authenticator;
import shopping.merchant.samples.utils.Config;

/**
 * This class demonstrates how to list all shopping program resources for a Merchant Center account.
 */
public class ListProgramsSample {

  public static void listPrograms(Config config) throws Exception {

    // Obtains OAuth token based on the user's configuration.
    GoogleCredentials credential = new Authenticator().authenticate();

    // Creates service settings using the credentials retrieved above.
    ProgramsServiceSettings programsServiceSettings =
        ProgramsServiceSettings.newBuilder()
            .setCredentialsProvider(FixedCredentialsProvider.create(credential))
            .build();

    // Creates parent to identify the account for which to list programs.
    String parent = AccountName.of(config.getAccountId().toString()).toString();

    // Calls the API and catches and prints any network failures/errors.
    try (ProgramsServiceClient programsServiceClient =
        ProgramsServiceClient.create(programsServiceSettings)) {

      ListProgramsRequest request = ListProgramsRequest.newBuilder().setParent(parent).build();

      System.out.println("Sending List Programs request:");
      ListProgramsPagedResponse response = programsServiceClient.listPrograms(request);

      int count = 0;

      // Iterates over all programs in all pages and prints each program.
      // Automatically uses the `nextPageToken`, if returned, to fetch all pages.
      for (Program program : response.iterateAll()) {
        System.out.println(program);
        count++;
      }
      System.out.print("The count of Programs returned: ");
      System.out.println(count);
    } catch (Exception e) {
      System.out.println(e);
    }
  }

  public static void main(String[] args) throws Exception {
    Config config = Config.load();

    listPrograms(config);
  }
}
ListProgramsSample.java

<?php
/**
 * Copyright 2025 Google LLC
 *
 * 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
 *
 *     https://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.
 */
require_once __DIR__ . '/../../../../vendor/autoload.php';
require_once __DIR__ . '/../../../Authentication/Authentication.php';
require_once __DIR__ . '/../../../Authentication/Config.php';
use Google\ApiCore\ApiException;
use Google\Shopping\Merchant\Accounts\V1\Client\ProgramsServiceClient;
use Google\Shopping\Merchant\Accounts\V1\ListProgramsRequest;

/**
 * This class demonstrates how to list all shopping program resources for a Merchant Center account.
 */
class ListProgramsSample
{
    /**
     * Lists all programs for the given Merchant Center account.
     *
     * @param array $config The configuration data for authentication and account ID.
     * @return void
     */
    public static function listPrograms($config): void
    {
        // Gets the OAuth credentials to make the request.
        $credentials = Authentication::useServiceAccountOrTokenFile();

        // Creates options config containing credentials for the client to use.
        $options = ['credentials' => $credentials];

        // Creates a client.
        $programsServiceClient = new ProgramsServiceClient($options);

        // Creates parent to identify the account for which to list programs.
        $parent = "accounts/" . $config['accountId'];

        // Calls the API and catches and prints any network failures/errors.
        try {
            $request = new ListProgramsRequest(['parent' => $parent]);

            print "Sending List Programs request:\n";
            $response = $programsServiceClient->listPrograms($request);

            $count = 0;

            // Iterates over all programs in all pages and prints each program.
            // Automatically uses the `nextPageToken`, if returned, to fetch all pages.
            foreach ($response->iterateAllElements() as $program) {
                print_r($program);
                $count++;
            }
            print "The count of Programs returned: ";
            print $count . "\n";
        } catch (ApiException $e) {
            print $e->getMessage();
        }
    }

    /**
     * Helper to execute the sample.
     *
     * @return void
     */
    public function callSample(): void
    {
        $config = Config::generateConfig();
        self::listPrograms($config);
    }
}

// Run the script
$sample = new ListProgramsSample();
$sample->callSample();
ListProgramsSample.php

# -*- coding: utf-8 -*-
# Copyright 2024 Google LLC
#
# 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.
"""A module for listing all program resources for a Merchant Center account."""

from examples.authentication import configuration
from examples.authentication import generate_user_credentials
from google.shopping.merchant_accounts_v1 import ListProgramsRequest
from google.shopping.merchant_accounts_v1 import ProgramsServiceClient

_ACCOUNT = configuration.Configuration().read_merchant_info()


def list_programs():
  """Lists all program resources for a Merchant Center account."""

  # Gets OAuth Credentials.
  credentials = generate_user_credentials.main()

  # Creates a client.
  client = ProgramsServiceClient(credentials=credentials)

  # Creates parent to identify the account for which to list programs.
  parent = "accounts/" + _ACCOUNT

  # Creates the request.
  request = ListProgramsRequest(parent=parent)

  # Makes the request and catches and prints any error messages.
  try:
    print("Sending List Programs request:")
    response = client.list_programs(request=request)

    count = 0
    # Iterates over all programs in all pages and prints each program.
    for program in response:
      print(program)
      count += 1

    print("The count of Programs returned: ")
    print(count)

  except RuntimeError as e:
    print(e)

if __name__ == "__main__":
  list_programs()

list_programs_sample.py