Add support for adapted extensions in Direct Checkout

changelog/add-2648-adapted-extensions-compatibility

@@ -0,0 +1,4 @@
+Significance: minor
+Type: add
+
+Enable adapted extensions compatibility with Direct Checkout.

client/checkout/woopay/connect/user-connect.js

@@ -11,6 +11,7 @@ class WooPayUserConnect extends WoopayConnect {
 		this.listeners = {
 			...this.listeners,
 			getIsUserLoggedInCallback: () => {},
+			getUserEmailCallback: () => {},
 		};
 	}
 
@@ -26,6 +27,18 @@ class WooPayUserConnect extends WoopayConnect {
 		);
 	}
 
+	/**
+	 * Retrieves the email of the logged in user.
+	 *
+	 * @return {Promise<string>} Resolves to the user's email if they're logged in, or an empty string otherwise.
+	 */
+	async getUserEmail() {
+		return await this.sendMessageAndListenWith(
+			{ action: 'getUserEmail' },
+			'getUserEmailCallback'
+		);
+	}
+
 	/**
 	 * Handles the callback from the WooPayConnectIframe.
 	 *
@@ -38,6 +51,9 @@ class WooPayUserConnect extends WoopayConnect {
 			case 'get_is_user_logged_in_success':
 				this.listeners.getIsUserLoggedInCallback( data.value );
 				break;
+			case 'get_user_email_success':
+				this.listeners.getUserEmailCallback( data.value );
+				break;
 		}
 	}
 }

client/checkout/woopay/connect/woopay-connect-iframe.js

@@ -22,9 +22,11 @@ export const WooPayConnectIframe = () => {
 		const fetchConfigAndSetIframeUrl = async () => {
 			const testMode = getConfig( 'testMode' );
 			const woopayHost = getConfig( 'woopayHost' );
+			const blogId = getConfig( 'woopayMerchantId' );
 			const urlParams = new URLSearchParams( {
 				testMode,
-				source_url: window.location.href,
+				source_url: window.location.href, // TODO: refactor this to camel case.
+				blogId,
 			} );
 
 			const tracksUserId = await getTracksIdentity();

client/checkout/woopay/direct-checkout/woopay-direct-checkout.js

@@ -79,12 +79,21 @@ class WooPayDirectCheckout {
 	/**
 	 * Checks if the user is logged in.
 	 *
-	 * @return {Promise<*>} Resolves to true if the user is logged in.
+	 * @return {Promise<bool>} Resolves to true if the user is logged in.
 	 */
 	static async isUserLoggedIn() {
 		return this.getUserConnect().isUserLoggedIn();
 	}
 
+	/**
+	 * Retrieves the email of the logged in user.
+	 *
+	 * @return {Promise<string>} Resolves to the user's email if they're logged in, and an empty string otherwise.
+	 */
+	static async getUserEmail() {
+		return this.getUserConnect().getUserEmail();
+	}
+
 	/**
 	 * Checks if third-party cookies are enabled.
 	 *
@@ -363,10 +372,12 @@ class WooPayDirectCheckout {
 	 * @return {Promise<Promise<*>|*>} Resolves to the WooPay session response.
 	 */
 	static async getEncryptedSessionData() {
+		const email = await this.getUserEmail();
 		return request(
 			buildAjaxURL( getConfig( 'wcAjaxUrl' ), 'get_woopay_session' ),
 			{
 				_ajax_nonce: getConfig( 'woopaySessionNonce' ),
+				...( email && { email } ),
 			}
 		);
 	}

includes/admin/class-wc-rest-woopay-session-controller.php

@@ -41,6 +41,13 @@ public function register_routes() {
 				'methods'             => WP_REST_Server::READABLE,
 				'callback'            => [ $this, 'get_session_data' ],
 				'permission_callback' => [ $this, 'check_permission' ],
+				'args'                => [
+					'email' => [
+						'type'     => 'string',
+						'format'   => 'email',
+						'required' => true,
+					],
+				],
 			]
 		);
 	}

includes/class-wc-payments-features.php

@@ -262,7 +262,7 @@ public static function is_woopay_direct_checkout_enabled() {
 		$is_direct_checkout_eligible     = is_array( $account_cache ) && ( $account_cache['platform_direct_checkout_eligible'] ?? false );
 		$is_direct_checkout_flag_enabled = '1' === get_option( self::WOOPAY_DIRECT_CHECKOUT_FLAG_NAME, '1' );
 
-		return $is_direct_checkout_eligible && $is_direct_checkout_flag_enabled && self::is_woopay_first_party_auth_enabled();
+		return $is_direct_checkout_eligible && $is_direct_checkout_flag_enabled && self::is_woopay_eligible();
 	}
 
 	/**

includes/woopay/class-woopay-session.php

@@ -377,6 +377,33 @@ private static function get_checkout_data( $woopay_request ) {
 		return $checkout_data;
 	}
 
+	/**
+	 * Retrieves the user email from the current session.
+	 *
+	 * @param \WP_User $user The user object.
+	 * @return string The user email.
+	 */
+	private static function get_user_email( $user ) {
+		if ( ! empty( $_POST['email'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification
+			if ( is_array( $_POST['email'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification
+				 // phpcs:ignore WordPress.Security.NonceVerification, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.ValidatedSanitizedInput.MissingUnslash
+				return sanitize_email( wp_unslash( WooPay_Utilities::decrypt_signed_data( $_POST['email'] ) ) ) ?? '';
+			}
+			return sanitize_email( wp_unslash( $_POST['email'] ) ); // phpcs:ignore WordPress.Security.NonceVerification
+		}
+
+		if ( ! empty( $_GET['email'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification
+			return sanitize_email( wp_unslash( $_GET['email'] ) ); // phpcs:ignore WordPress.Security.NonceVerification
+		}
+
+		// As a last resort, we try to get the email from the customer logged in the store.
+		if ( $user->ID > 0 ) {
+			return $user->user_email;
+		}
+
+		return '';
+	}
+
 	/**
 	 * Returns the initial session request data.
 	 *
@@ -424,13 +451,12 @@ public static function get_init_session_request( $order_id = null, $key = null,
 
 		$cart_data     = self::get_cart_data( $is_pay_for_order, $order_id, $key, $billing_email, $woopay_request );
 		$checkout_data = self::get_checkout_data( $woopay_request );
+		$email         = self::get_user_email( $user );
 
 		if ( $woopay_request ) {
 			$order_id = $checkout_data['order_id'] ?? null;
 		}
 
-		$email = ! empty( $_POST['email'] ) ? wc_clean( wp_unslash( $_POST['email'] ) ) : ''; // phpcs:ignore WordPress.Security.NonceVerification
-
 		$request = [
 			'wcpay_version'        => WCPAY_VERSION_NUMBER,
 			'user_id'              => $user->ID,

includes/woopay/class-woopay-utilities.php

@@ -288,6 +288,41 @@ public static function encrypt_and_sign_data( $data ) {
 		];
 	}
 
+	/**
+	 * Decode encrypted and signed data and return it.
+	 *
+	 * @param array $data The session, iv, and hash data for the encryption.
+	 * @return mixed The decoded data.
+	 */
+	public static function decrypt_signed_data( $data ) {
+		$blog_token = ( self::get_woopay_url() === self::DEFAULT_WOOPAY_URL ) ? Jetpack_Options::get_option( 'blog_token' ) : 'dev_mode';
+
+		// Decode the data.
+		$decoded_data_request = array_map( 'base64_decode', $data );
+		$passphrase           = ( defined( 'WOOPAY_BLOG_ID' ) && WOOPAY_BLOG_ID === \Jetpack_Options::get_option( 'id' ) ) ? $blog_token : 'dev_mode';
+
+		if ( empty( $passphrase ) ) {
+			return null;
+		}
+
+		// Verify the HMAC hash before decryption to ensure data integrity.
+		$computed_hash = hash_hmac( 'sha256', $decoded_data_request['data'], $passphrase );
+
+		// If the hashes don't match, the message may have been tampered with.
+		if ( ! hash_equals( $computed_hash, $decoded_data_request['hash'] ) ) {
+			return null;
+		}
+
+		// Decipher the data data using the passphrase and the IV.
+		$decrypted_data = openssl_decrypt( $decoded_data_request['data'], 'aes-256-cbc', $passphrase, OPENSSL_RAW_DATA, $decoded_data_request['iv'] );
+
+		if ( false === $decrypted_data ) {
+			return null;
+		}
+
+		return $decrypted_data;
+	}
+
 	/**
 	 * Get the persisted available countries.
 	 *

tests/unit/test-class-wc-payments-features.php

@@ -183,7 +183,6 @@ public function test_is_woopay_express_checkout_enabled_returns_false_when_woopa
 
 	public function test_is_woopay_direct_checkout_enabled_returns_true() {
 		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_EXPRESS_CHECKOUT_FLAG_NAME, '1' );
-		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_FIRST_PARTY_AUTH_FLAG_NAME, '1' );
 		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_DIRECT_CHECKOUT_FLAG_NAME, '1' );
 		$this->mock_cache->method( 'get' )->willReturn(
 			[
@@ -196,7 +195,6 @@ public function test_is_woopay_direct_checkout_enabled_returns_true() {
 
 	public function test_is_woopay_direct_checkout_enabled_returns_false_when_flag_is_false() {
 		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_EXPRESS_CHECKOUT_FLAG_NAME, '1' );
-		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_FIRST_PARTY_AUTH_FLAG_NAME, '1' );
 		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_DIRECT_CHECKOUT_FLAG_NAME, '0' );
 		$this->mock_cache->method( 'get' )->willReturn(
 			[
@@ -209,7 +207,6 @@ public function test_is_woopay_direct_checkout_enabled_returns_false_when_flag_i
 
 	public function test_is_woopay_direct_checkout_enabled_returns_false_when_woopay_eligible_is_false() {
 		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_EXPRESS_CHECKOUT_FLAG_NAME, '1' );
-		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_FIRST_PARTY_AUTH_FLAG_NAME, '1' );
 		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_DIRECT_CHECKOUT_FLAG_NAME, '1' );
 		$this->mock_cache->method( 'get' )->willReturn(
 			[
@@ -220,7 +217,7 @@ public function test_is_woopay_direct_checkout_enabled_returns_false_when_woopay
 		$this->assertFalse( WC_Payments_Features::is_woopay_direct_checkout_enabled() );
 	}
 
-	public function test_is_woopay_direct_checkout_enabled_returns_false_when_first_party_auth_is_disabled() {
+	public function test_is_woopay_direct_checkout_enabled_returns_true_when_first_party_auth_is_disabled() {
 		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_EXPRESS_CHECKOUT_FLAG_NAME, '1' );
 		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_FIRST_PARTY_AUTH_FLAG_NAME, '0' );
 		$this->set_feature_flag_option( WC_Payments_Features::WOOPAY_DIRECT_CHECKOUT_FLAG_NAME, '1' );
@@ -230,7 +227,7 @@ public function test_is_woopay_direct_checkout_enabled_returns_false_when_first_
 				'platform_direct_checkout_eligible' => true,
 			]
 		);
-		$this->assertFalse( WC_Payments_Features::is_woopay_direct_checkout_enabled() );
+		$this->assertTrue( WC_Payments_Features::is_woopay_direct_checkout_enabled() );
 	}
 
 	public function test_is_wcpay_frt_review_feature_active_returns_true() {