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🔧 Edit: Middleware.php

PHP

Size: 25.10 KB | Modified: 2026-01-29 01:01:18

<?php
declare( strict_types=1 );

namespace Automattic\WooCommerce\GoogleListingsAndAds\API\Google;

use Automattic\WooCommerce\GoogleListingsAndAds\Google\GoogleHelper;
use Automattic\WooCommerce\GoogleListingsAndAds\Exception\InvalidTerm;
use Automattic\WooCommerce\GoogleListingsAndAds\Exception\InvalidDomainName;
use Automattic\WooCommerce\GoogleListingsAndAds\Internal\ContainerAwareTrait;
use Automattic\WooCommerce\GoogleListingsAndAds\Internal\Interfaces\ContainerAwareInterface;
use Automattic\WooCommerce\GoogleListingsAndAds\Options\OptionsAwareInterface;
use Automattic\WooCommerce\GoogleListingsAndAds\Options\OptionsAwareTrait;
use Automattic\WooCommerce\GoogleListingsAndAds\Options\TransientsInterface;
use Automattic\WooCommerce\GoogleListingsAndAds\PluginHelper;
use Automattic\WooCommerce\GoogleListingsAndAds\Proxies\WC;
use Automattic\WooCommerce\GoogleListingsAndAds\Proxies\WP;
use Automattic\WooCommerce\GoogleListingsAndAds\Utility\DateTimeUtility;
use Automattic\WooCommerce\GoogleListingsAndAds\Utility\ISOUtility;
use Automattic\WooCommerce\GoogleListingsAndAds\Value\TosAccepted;
use Automattic\WooCommerce\GoogleListingsAndAds\Vendor\GuzzleHttp\Client;
use Automattic\WooCommerce\GoogleListingsAndAds\Vendor\Psr\Container\ContainerExceptionInterface;
use Automattic\WooCommerce\GoogleListingsAndAds\Vendor\Psr\Container\NotFoundExceptionInterface;
use Automattic\WooCommerce\GoogleListingsAndAds\Vendor\Psr\Http\Client\ClientExceptionInterface;
use DateTime;
use Exception;

defined( 'ABSPATH' ) || exit;

/**
 * Class Middleware
 *
 * Container used for:
 * - Ads
 * - Client
 * - DateTimeUtility
 * - GoogleHelper
 * - ISOUtility
 * - Merchant
 * - WC
 * - WP
 *
 * @package Automattic\WooCommerce\GoogleListingsAndAds\API\Google
 */
class Middleware implements ContainerAwareInterface, OptionsAwareInterface {

use ContainerAwareTrait;
	use ExceptionTrait;
	use OptionsAwareTrait;
	use PluginHelper;

/**
	 * Get all Merchant Accounts associated with the connected account.
	 *
	 * @return array
	 * @throws Exception When an Exception is caught.
	 * @since 1.7.0
	 */
	public function get_merchant_accounts(): array {
		try {
			/** @var Client $client */
			$client   = $this->container->get( Client::class );
			$result   = $client->get( $this->get_manager_url( 'merchant-accounts' ) );
			$response = json_decode( $result->getBody()->getContents(), true );
			$accounts = [];

if ( 200 === $result->getStatusCode() && is_array( $response ) ) {
				foreach ( $response as $account ) {
					$accounts[] = $account;
				}
			}

return $accounts;
		} catch ( ClientExceptionInterface $e ) {
			do_action( 'woocommerce_gla_guzzle_client_exception', $e, __METHOD__ );

throw new Exception(
				$this->client_exception_message( $e, __( 'Error retrieving accounts', 'google-listings-and-ads' ) ),
				$e->getCode()
			);
		}
	}

/**
	 * Create a new Merchant Center account.
	 *
	 * @return int Created merchant account ID
	 *
	 * @throws Exception When an Exception is caught or we receive an invalid response.
	 */
	public function create_merchant_account(): int {
		$user = wp_get_current_user();
		$tos  = $this->mark_tos_accepted( 'google-mc', $user->user_email );
		if ( ! $tos->accepted() ) {
			throw new Exception( __( 'Unable to log accepted TOS', 'google-listings-and-ads' ) );
		}

$site_url = esc_url_raw( $this->get_site_url() );
		if ( ! wc_is_valid_url( $site_url ) ) {
			throw new Exception( __( 'Invalid site URL.', 'google-listings-and-ads' ) );
		}

try {
			return $this->create_merchant_account_request(
				$this->new_account_name(),
				$site_url
			);
		} catch ( InvalidTerm $e ) {
			// Try again with a default account name.
			return $this->create_merchant_account_request(
				$this->default_account_name(),
				$site_url
			);
		}
	}

/**
	 * Send a request to create a merchant account.
	 *
	 * @param string $name Site name
	 * @param string $site_url Website URL
	 *
	 * @return int Created merchant account ID
	 *
	 * @throws Exception   When an Exception is caught or we receive an invalid response.
	 * @throws InvalidTerm When the account name contains invalid terms.
	 * @throws InvalidDomainName When the site URL ends with an invalid top-level domain.
	 * @since 1.5.0
	 */
	protected function create_merchant_account_request( string $name, string $site_url ): int {
		try {
			/** @var Client $client */
			$client = $this->container->get( Client::class );

/** @var ISOUtility $iso_utility */
			$iso_utility = $this->container->get( ISOUtility::class );

/** @var WP $wp */
			$wp = $this->container->get( WP::class );

$result = $client->post(
				$this->get_manager_url( 'create-merchant' ),
				[
					'body' => wp_json_encode(
						[
							'name'         => $name,
							'websiteUrl'   => $site_url,
							'timeZone'     => $this->get_site_timezone_string(),
							'languageCode' => $iso_utility->wp_locale_to_bcp47( $wp->get_user_locale() ),
						]
					),
				]
			);

$response = json_decode( $result->getBody()->getContents(), true );

if ( 200 === $result->getStatusCode() && isset( $response['id'] ) ) {
				$id = absint( $response['id'] );
				$this->container->get( Merchant::class )->update_merchant_id( $id );
				return $id;
			}

do_action( 'woocommerce_gla_guzzle_invalid_response', $response, __METHOD__ );

$error = $response['message'] ?? __( 'Invalid response when creating account', 'google-listings-and-ads' );
			throw new Exception( $error, $result->getStatusCode() );
		} catch ( ClientExceptionInterface $e ) {
			$message = $this->client_exception_message( $e, __( 'Error creating account', 'google-listings-and-ads' ) );

// Content API for Shopping: Invalid account name terms.
			// Merchant API: Account name validation failed.
			if ( preg_match( '/terms?.* are|is not allowed/', $message ) ||
				preg_match( '/the account did not pass validation/i', $message ) ) {
				throw InvalidTerm::contains_invalid_terms( $name );
			}

$site_url = $this->strip_url_protocol( esc_url_raw( $this->get_site_url() ) );

// Content API for Shopping: Invalid top-level domain name.
			if ( strpos( $message, 'URL ends with an invalid top-level domain name' ) !== false ) {
				throw InvalidDomainName::create_account_failed_invalid_top_level_domain_name( $site_url );
			}

// Merchant API: Invalid homepage URL.
			if ( strpos( $message, 'Unable to set homepage URL' ) !== false ) {
				throw InvalidDomainName::create_account_failed_invalid_homepage_url( $site_url );
			}

do_action( 'woocommerce_gla_guzzle_client_exception', $e, __METHOD__ );
			throw new Exception( $message, $e->getCode() );
		}
	}

/**
	 * Link an existing Merchant Center account.
	 *
	 * @param int $id Existing account ID.
	 *
	 * @return int
	 */
	public function link_merchant_account( int $id ): int {
		$this->container->get( Merchant::class )->update_merchant_id( $id );

return $id;
	}

/**
	 * Link Merchant Center account to MCA.
	 *
	 * @return bool
	 * @throws Exception When a ClientException is caught or we receive an invalid response.
	 */
	public function link_merchant_to_mca(): bool {
		try {
			/** @var Client $client */
			$client = $this->container->get( Client::class );
			$result = $client->post(
				$this->get_manager_url( 'link-merchant' ),
				[
					'body' => wp_json_encode(
						[
							'accountId' => $this->options->get_merchant_id(),
						]
					),
				]
			);

$response = json_decode( $result->getBody()->getContents(), true );

if ( 200 === $result->getStatusCode() && isset( $response['status'] ) && 'success' === $response['status'] ) {
				return true;
			}

do_action( 'woocommerce_gla_guzzle_invalid_response', $response, __METHOD__ );

$error = $response['message'] ?? __( 'Invalid response when linking merchant to MCA', 'google-listings-and-ads' );
			throw new Exception( $error, $result->getStatusCode() );
		} catch ( ClientExceptionInterface $e ) {
			do_action( 'woocommerce_gla_guzzle_client_exception', $e, __METHOD__ );

throw new Exception(
				$this->client_exception_message( $e, __( 'Error linking merchant to MCA', 'google-listings-and-ads' ) ),
				$e->getCode()
			);
		}
	}

/**
	 * Claim the website for a MCA.
	 *
	 * @param bool $overwrite To enable claim overwriting.
	 * @return bool
	 * @throws Exception When an Exception is caught or we receive an invalid response.
	 */
	public function claim_merchant_website( bool $overwrite = false ): bool {
		try {
			/** @var Client $client */
			$client = $this->container->get( Client::class );
			$result = $client->post(
				$this->get_manager_url( 'claim-website' ),
				[
					'body' => wp_json_encode(
						[
							'accountId' => $this->options->get_merchant_id(),
							'overwrite' => $overwrite,
						]
					),
				]
			);

$response = json_decode( $result->getBody()->getContents(), true );

if ( 200 === $result->getStatusCode() && isset( $response['status'] ) && 'success' === $response['status'] ) {
				do_action( 'woocommerce_gla_site_claim_success', [ 'details' => 'google_manager' ] );
				return true;
			}

do_action( 'woocommerce_gla_guzzle_invalid_response', $response, __METHOD__ );
			do_action( 'woocommerce_gla_site_claim_failure', [ 'details' => 'google_manager' ] );

$error = $response['message'] ?? __( 'Invalid response when claiming website', 'google-listings-and-ads' );
			throw new Exception( $error, $result->getStatusCode() );
		} catch ( ClientExceptionInterface $e ) {
			do_action( 'woocommerce_gla_guzzle_client_exception', $e, __METHOD__ );
			do_action( 'woocommerce_gla_site_claim_failure', [ 'details' => 'google_manager' ] );

throw new Exception(
				$this->client_exception_message( $e, __( 'Error claiming website', 'google-listings-and-ads' ) ),
				$e->getCode()
			);
		}
	}

/**
	 * Create a new Google Ads account.
	 *
	 * @return array
	 * @throws Exception When a ClientException is caught, unsupported store country, or we receive an invalid response.
	 */
	public function create_ads_account(): array {
		try {
			$country = $this->container->get( WC::class )->get_base_country();

/** @var GoogleHelper $google_helper */
			$google_helper = $this->container->get( GoogleHelper::class );
			if ( ! $google_helper->is_country_supported( $country ) ) {
				throw new Exception( __( 'Store country is not supported', 'google-listings-and-ads' ) );
			}

$user = wp_get_current_user();
			$tos  = $this->mark_tos_accepted( 'google-ads', $user->user_email );
			if ( ! $tos->accepted() ) {
				throw new Exception( __( 'Unable to log accepted TOS', 'google-listings-and-ads' ) );
			}

/** @var Client $client */
			$client = $this->container->get( Client::class );
			$result = $client->post(
				$this->get_manager_url( $country . '/create-customer' ),
				[
					'body' => wp_json_encode(
						[
							'descriptive_name' => $this->new_account_name(),
							'currency_code'    => get_woocommerce_currency(),
							'time_zone'        => $this->get_site_timezone_string(),
						]
					),
				]
			);

$response = json_decode( $result->getBody()->getContents(), true );

if ( 200 === $result->getStatusCode() && isset( $response['resourceName'] ) ) {
				/** @var Ads $ads */
				$ads = $this->container->get( Ads::class );

$id = $ads->parse_ads_id( $response['resourceName'] );
				$ads->update_ads_id( $id );
				$ads->use_store_currency();

$billing_url = $response['invitationLink'] ?? '';
				$ads->update_billing_url( $billing_url );
				$ads->update_ocid_from_billing_url( $billing_url );

return [
					'id'          => $id,
					'billing_url' => $billing_url,
				];
			}

do_action( 'woocommerce_gla_guzzle_invalid_response', $response, __METHOD__ );

$error = $response['message'] ?? __( 'Invalid response when creating account', 'google-listings-and-ads' );
			throw new Exception( $error, $result->getStatusCode() );
		} catch ( ClientExceptionInterface $e ) {
			do_action( 'woocommerce_gla_guzzle_client_exception', $e, __METHOD__ );

throw new Exception(
				$this->client_exception_message( $e, __( 'Error creating account', 'google-listings-and-ads' ) ),
				$e->getCode()
			);
		}
	}

/**
	 * Link an existing Google Ads account.
	 *
	 * @param int $id Existing account ID.
	 *
	 * @return array
	 * @throws Exception When a ClientException is caught or we receive an invalid response.
	 */
	public function link_ads_account( int $id ): array {
		try {
			/** @var Client $client */
			$client = $this->container->get( Client::class );
			$result = $client->post(
				$this->get_manager_url( 'link-customer' ),
				[
					'body' => wp_json_encode(
						[
							'client_customer' => $id,
						]
					),
				]
			);

$response = json_decode( $result->getBody()->getContents(), true );
			$name     = "customers/{$id}";

if ( 200 === $result->getStatusCode() && isset( $response['resourceName'] ) && 0 === strpos( $response['resourceName'], $name ) ) {
				/** @var Ads $ads */
				$ads = $this->container->get( Ads::class );

$ads->update_ads_id( $id );
				$ads->request_ads_currency();

return [ 'id' => $id ];
			}

do_action( 'woocommerce_gla_guzzle_invalid_response', $response, __METHOD__ );

$error = $response['message'] ?? __( 'Invalid response when linking account', 'google-listings-and-ads' );
			throw new Exception( $error, $result->getStatusCode() );
		} catch ( ClientExceptionInterface $e ) {
			do_action( 'woocommerce_gla_guzzle_client_exception', $e, __METHOD__ );

throw new Exception(
				$this->client_exception_message( $e, __( 'Error linking account', 'google-listings-and-ads' ) ),
				$e->getCode()
			);
		}
	}

/**
	 * Determine whether the TOS have been accepted.
	 *
	 * @param string $service Name of service.
	 *
	 * @return TosAccepted
	 */
	public function check_tos_accepted( string $service ): TosAccepted {
		try {
			/** @var Client $client */
			$client = $this->container->get( Client::class );
			$result = $client->get( $this->get_tos_url( $service ) );

return new TosAccepted( 200 === $result->getStatusCode(), $result->getBody()->getContents() );
		} catch ( ClientExceptionInterface $e ) {
			do_action( 'woocommerce_gla_guzzle_client_exception', $e, __METHOD__ );

return new TosAccepted( false, $e->getMessage() );
		}
	}

/**
	 * Record TOS acceptance for a particular email address.
	 *
	 * @param string $service Name of service.
	 * @param string $email
	 *
	 * @return TosAccepted
	 */
	public function mark_tos_accepted( string $service, string $email ): TosAccepted {
		try {
			/** @var Client $client */
			$client = $this->container->get( Client::class );
			$result = $client->post(
				$this->get_tos_url( $service ),
				[
					'body' => wp_json_encode(
						[
							'email' => $email,
						]
					),
				]
			);

return new TosAccepted(
				200 === $result->getStatusCode(),
				$result->getBody()->getContents() ?? $result->getReasonPhrase()
			);
		} catch ( ClientExceptionInterface $e ) {
			do_action( 'woocommerce_gla_guzzle_client_exception', $e, __METHOD__ );
			return new TosAccepted( false, $e->getMessage() );
		} catch ( Exception $e ) {
			do_action( 'woocommerce_gla_exception', $e, __METHOD__ );
			return new TosAccepted( false, $e->getMessage() );
		}
	}

/**
	 * Get the TOS endpoint URL
	 *
	 * @param string $service Name of service.
	 *
	 * @return string
	 */
	protected function get_tos_url( string $service ): string {
		$url = $this->container->get( 'connect_server_root' ) . 'tos';
		return $service ? trailingslashit( $url ) . $service : $url;
	}

/**
	 * Get the manager endpoint URL
	 *
	 * @param string $name Resource name.
	 *
	 * @return string
	 */
	protected function get_manager_url( string $name = '' ): string {
		$url = $this->container->get( 'connect_server_root' ) . 'google/manager';
		return $name ? trailingslashit( $url ) . $name : $url;
	}

/**
	 * Get the server endpoint URL
	 *
	 * @since 3.2.0
	 *
	 * @param string $name Resource name.
	 *
	 * @return string
	 */
	protected function get_server_url( string $name = '' ): string {
		$url = $this->container->get( 'connect_server_root' );
		return $name ? trailingslashit( $url ) . $name : $url;
	}

/**
	 * Get the Google Shopping Data Integration auth endpoint URL
	 *
	 * @return string
	 */
	public function get_sdi_auth_endpoint(): string {
		return $this->container->get( 'connect_server_root' )
				. 'google/google-sdi/v1/credentials/partners/WOO_COMMERCE/merchants/'
				. $this->strip_url_protocol( $this->get_site_url() )
				. '/oauth/redirect:generate'
				. '?merchant_id=' . $this->options->get_merchant_id();
	}

/**
	 * Get the URL for the Google SDI merchant update endpoint.
	 *
	 * @return string
	 */
	public function get_sdi_merchant_update_endpoint(): string {
		return $this->get_sdi_endpoint() . 'account:connect';
	}

/**
	 * Get the base endpoint to the Google Shopping Data Integration (SDI).
	 *
	 * @return string
	 */
	protected function get_sdi_endpoint(): string {
		/**
		 * Reason for using `rawurlencode` to encode the site URL:
		 *
		 * This plugin doesn't natively support linking a Google Merchant
		 * Center account and the Google Shopping Data Integration API using a
		 * merchant URL with paths. However, some merchants still use the
		 * plugin's WP filter `woocommerce_gla_site_url` to achieve this.
		 *
		 * However, a site URL containing paths will cause API routing errors
		 * if it's not encoded, due to the unexpected appearance of `/`.
		 * For example, when the URL is 'wp.test/ja/shop',
		 * `[...]/merchants/wp.test/ja/shop/account:connect` will cause an API error.
		 * The encoded `[...]/merchants/wp.test%2Fja%2Fshop/account:connect` will
		 * point to the correct route.
		*/
		return $this->container->get( 'connect_server_root' )
			. 'google/google-sdi/v1/credentials/partners/WOO_COMMERCE/merchants/'
			. rawurlencode( $this->strip_url_protocol( $this->get_site_url() ) )
			. '/';
	}

/**
	 * Performs a request to Google Shopping Data Integration (SDI) to update the merchant center account.
	 *
	 * @throws NotFoundExceptionInterface  When the container was not found.
	 * @throws ContainerExceptionInterface When an error happens while retrieving the container.
	 * @throws Exception When the response status is not successful, or merchant ID is not set.
	 * @see google-sdi in google/services inside WCS
	 */
	public function update_sdi_merchant_account() {
		try {
			if ( ! $this->options->get_merchant_id() ) {
				throw new Exception( __( 'Merchant ID must be set before updating in SDI.', 'google-listings-and-ads' ) );
			}

/** @var Client $client */
			$client = $this->container->get( Client::class );
			$result = $client->post(
				$this->get_sdi_merchant_update_endpoint(),
				[
					'body' => wp_json_encode(
						[
							'merchant_center_id' => $this->options->get_merchant_id(),
							'blog_id'            => \Jetpack_Options::get_option( 'id' ),
						]
					),
				]
			);

// Check the status, since an empty response is returned upon success.
			if ( 200 !== $result->getStatusCode() ) {
				$response = json_decode( $result->getBody()->getContents(), true );
				do_action( 'woocommerce_gla_guzzle_invalid_response', $response, __METHOD__ );

throw new Exception(
					__( 'Invalid response when updating merchant account in Google Partner APP.', 'google-listings-and-ads' ),
					$result->getStatusCode()
				);
			}
		} catch ( ClientExceptionInterface $e ) {
			do_action( 'woocommerce_gla_guzzle_client_exception', $e, __METHOD__ );

throw new Exception(
				$this->client_exception_message( $e, __( 'Error updating merchant account in Google Partner APP.', 'google-listings-and-ads' ) ),
				$e->getCode()
			);
		}
	}

/**
	 * Generate a descriptive name for a new account.
	 * Use site name if available.
	 *
	 * @return string
	 */
	protected function new_account_name(): string {
		$site_name = get_bloginfo( 'name' );
		return ! empty( $site_name ) ? $site_name : $this->default_account_name();
	}

/**
	 * Generate a default account name based on the date.
	 *
	 * @return string
	 */
	protected function default_account_name(): string {
		return 'Account ' . gmdate( 'dMy' );
	}

/**
	 * Get a timezone string from WP Settings.
	 *
	 * @return string
	 * @throws Exception If the DateTime instantiation fails.
	 */
	protected function get_site_timezone_string(): string {
		/** @var WP $wp */
		$wp       = $this->container->get( WP::class );
		$timezone = $wp->wp_timezone_string();

/** @var DateTimeUtility $datetime_util */
		$datetime_util = $this->container->get( DateTimeUtility::class );

return $datetime_util->maybe_convert_tz_string( $timezone );
	}

/**
	 * This function detects if the current account is a sub-account
	 * This function is cached in the MC_IS_SUBACCOUNT transient
	 *
	 * @return bool True if it's a standalone account.
	 */
	public function is_subaccount(): bool {
		/** @var TransientsInterface $transients */
		$transients    = $this->container->get( TransientsInterface::class );
		$is_subaccount = $transients->get( $transients::MC_IS_SUBACCOUNT );

if ( is_null( $is_subaccount ) ) {
			$is_subaccount = 0;

$merchant_id = $this->options->get_merchant_id();
			$accounts    = $this->get_merchant_accounts();

foreach ( $accounts as $account ) {
				if ( $account['id'] === $merchant_id && $account['subaccount'] ) {
					$is_subaccount = 1;
				}
			}

$transients->set( $transients::MC_IS_SUBACCOUNT, $is_subaccount );
		}

// since transients don't support booleans, we save them as 0/1 and do the conversion here
		return boolval( $is_subaccount );
	}

/**
	 * Performs a request to Google Shopping Data Integration (SDI) to get required information in order to form an auth URL.
	 *
	 * @return array An array with the JSON response from the WCS server.
	 * @throws NotFoundExceptionInterface  When the container was not found.
	 * @throws ContainerExceptionInterface When an error happens while retrieving the container.
	 * @throws Exception When the response status is not successful.
	 * @see google-sdi in google/services inside WCS
	 */
	public function get_sdi_auth_params() {
		try {
			/** @var Client $client */
			$client   = $this->container->get( Client::class );
			$result   = $client->get( $this->get_sdi_auth_endpoint() );
			$response = json_decode( $result->getBody()->getContents(), true );

if ( 200 !== $result->getStatusCode() ) {
				do_action(
					'woocommerce_gla_partner_app_auth_failure',
					[
						'error'    => 'response',
						'response' => $response,
					]
				);
				do_action( 'woocommerce_gla_guzzle_invalid_response', $response, __METHOD__ );
				$error = $response['message'] ?? __( 'Invalid response authenticating partner app.', 'google-listings-and-ads' );
				throw new Exception( $error, $result->getStatusCode() );
			}

return $response;

} catch ( ClientExceptionInterface $e ) {
			do_action( 'woocommerce_gla_guzzle_client_exception', $e, __METHOD__ );

throw new Exception(
				$this->client_exception_message( $e, __( 'Error authenticating Google Partner APP.', 'google-listings-and-ads' ) ),
				$e->getCode()
			);
		}
	}

/**
	 * Fetch incentive credits from the Google Ads API.
	 *
	 * @since 3.2.0
	 *
	 * @return array The incentive credits data.
	 * @throws Exception When an error occurs during the request.
	 */
	public function get_incentive_credits(): array {
		$country = $this->container->get( WC::class )->get_base_country();

try {
			/** @var Client $client */
			$client = $this->container->get( Client::class );

// Send GET request to the incentive credits endpoint using the stores base country.
			$result = $client->get(
				$this->get_server_url( 'google/ads/incentive-credits' ),
				[
					'query' => [
						'countries' => $country,
					],
				]
			);

$response = json_decode( $result->getBody()->getContents(), true );

if ( 200 !== $result->getStatusCode() ) {
				do_action( 'woocommerce_gla_guzzle_invalid_response', $response, __METHOD__ );
				$error = $response['message'] ?? __( 'Invalid response when fetching incentive credits.', 'google-listings-and-ads' );
				throw new Exception( $error, $result->getStatusCode() );
			}

if ( ! empty( $response['offers'] ) && is_array( $response['offers'] ) ) {
				$offers               = $response['offers'];
				$ads_currency         = $this->container->get( Ads::class )->get_ads_currency();
				$store_currency       = $this->container->get( WC::class )->get_woocommerce_currency();
				$ads_currency_index   = -1;
				$store_currency_index = -1;
				$index_key            = -1;

// Loop through all offers and locate Ads currency and store currency as a fallback.
				foreach ( $offers as $index => $offer ) {
					if ( $offer['currency'] === $ads_currency ) {
						$ads_currency_index = $index;
					}
					if ( $offer['currency'] === $store_currency ) {
						$store_currency_index = $index;
					}
				}

// Ads account currency is prioritized.
				if ( $ads_currency_index !== -1 ) {
					$index_key = $ads_currency_index;
				} elseif ( $store_currency_index !== -1 ) {
					$index_key = $store_currency_index;
				} else {
					$index_key = array_key_first( $offers );
				}

// Include Ads account currency in the response.
				$offers[ $index_key ]['ads_currency'] = $ads_currency;
				return $offers[ $index_key ];
			}

return [];
		} catch ( ClientExceptionInterface $e ) {
			do_action( 'woocommerce_gla_guzzle_client_exception', $e, __METHOD__ );

throw new Exception(
				$this->client_exception_message( $e, __( 'Error fetching incentive credits.', 'google-listings-and-ads' ) ),
				$e->getCode()
			);
		}
	}
}

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