Customizing BNPL messaging with Appearance API

changelog/appearance-api-bnp-message

@@ -0,0 +1,4 @@
+Significance: minor
+Type: add
+
+Customizing BNPL messaging with Appearance API

client/checkout/api/index.js

@@ -410,13 +410,13 @@ export default class WCPayAPI {
 	 * Saves the calculated UPE appearance values in a transient.
 	 *
 	 * @param {Object} appearance The UPE appearance object with style values
-	 * @param {string} isBlocksCheckout 'true' if save request is for Blocks Checkout. Default 'false'.
+	 * @param {string} elementsLocation The location of the elements.
 	 *
 	 * @return {Promise} The final promise for the request to the server.
 	 */
-	saveUPEAppearance( appearance, isBlocksCheckout = 'false' ) {
+	saveUPEAppearance( appearance, elementsLocation ) {
 		return this.request( getConfig( 'ajaxUrl' ), {
-			is_blocks_checkout: isBlocksCheckout,
+			elements_location: elementsLocation,
 			appearance: JSON.stringify( appearance ),
 			action: 'save_upe_appearance',
 			// eslint-disable-next-line camelcase

client/checkout/blocks/payment-elements.js

@@ -26,10 +26,10 @@ const PaymentElements = ( { api, ...props } ) => {
 	useEffect( () => {
 		async function generateUPEAppearance() {
 			// Generate UPE input styles.
-			let upeAppearance = getAppearance( true );
+			let upeAppearance = getAppearance( 'blocks_checkout' );
 			upeAppearance = await api.saveUPEAppearance(
 				upeAppearance,
-				'true'
+				'blocks_checkout'
 			);
 			setAppearance( upeAppearance );
 		}

client/checkout/classic/payment-processing.js

@@ -50,7 +50,10 @@ async function initializeAppearance( api ) {
 		return Promise.resolve( appearance );
 	}
 
-	return await api.saveUPEAppearance( getAppearance() );
+	return await api.saveUPEAppearance(
+		getAppearance( 'shortcode_checkout' ),
+		'shortcode_checkout'
+	);
 }
 
 /**

client/checkout/classic/test/payment-processing.test.js

@@ -185,7 +185,8 @@ describe( 'Stripe Payment Element mounting', () => {
 
 		expect( getAppearance ).toHaveBeenCalled();
 		expect( apiMock.saveUPEAppearance ).toHaveBeenCalledWith(
-			appearanceMock
+			appearanceMock,
+			'shortcode_checkout'
 		);
 		expect( dispatchMock ).toHaveBeenCalled();
 	} );

client/checkout/upe-styles/index.js

@@ -59,6 +59,21 @@ const appearanceSelectors = {
 			'body',
 		],
 	},
+	bnplProductPage: {
+		appendTarget: '.product .cart .quantity',
+		upeThemeInputSelector: '.product .cart .quantity .qty',
+		upeThemeLabelSelector: '.product .cart .quantity label',
+		rowElement: 'div',
+		validClasses: [ 'input-text' ],
+		invalidClasses: [ 'input-text', 'has-error' ],
+		backgroundSelectors: [
+			'#payment-method-message',
+			'#main > .product > div.summary.entry-summary',
+			'#main > .product',
+			'#main',
+			'body',
+		],
+	},
 
 	/**
 	 * Update selectors to use alternate if not present on DOM.
@@ -88,21 +103,28 @@ const appearanceSelectors = {
 	/**
 	 * Returns selectors based on checkout type.
 	 *
-	 * @param {boolean} isBlocksCheckout True ff block checkout. Default false.
+	 * @param {boolean} elementsLocation The location of the elements.
 	 *
 	 * @return {Object} Selectors for checkout type specified.
 	 */
-	getSelectors: function ( isBlocksCheckout = false ) {
-		if ( isBlocksCheckout ) {
-			return {
-				...this.default,
-				...this.updateSelectors( this.blocksCheckout ),
-			};
+	getSelectors: function ( elementsLocation ) {
+		let appearanceSelector = this.blocksCheckout;
+
+		switch ( elementsLocation ) {
+			case 'blocks_checkout':
+				appearanceSelector = this.blocksCheckout;
+				break;
+			case 'classic_checkout':
+				appearanceSelector = this.classicCheckout;
+				break;
+			case 'bnpl_product_page':
+				appearanceSelector = this.bnplProductPage;
+				break;
 		}
 
 		return {
 			...this.default,
-			...this.updateSelectors( this.classicCheckout ),
+			...this.updateSelectors( appearanceSelector ),
 		};
 	},
 };
@@ -180,10 +202,10 @@ const hiddenElementsForUPE = {
 	/**
 	 * Initialize hidden fields to generate UPE styles.
 	 *
-	 * @param {boolean} isBlocksCheckout True if Blocks Checkout. Default false.
+	 * @param {boolean} elementsLocation The location of the elements.
 	 */
-	init: function ( isBlocksCheckout = false ) {
-		const selectors = appearanceSelectors.getSelectors( isBlocksCheckout ),
+	init: function ( elementsLocation ) {
+		const selectors = appearanceSelectors.getSelectors( elementsLocation ),
 			appendTarget = document.querySelector( selectors.appendTarget ),
 			elementToClone = document.querySelector(
 				selectors.upeThemeInputSelector
@@ -342,11 +364,11 @@ export const getFontRulesFromPage = () => {
 	return fontRules;
 };
 
-export const getAppearance = ( isBlocksCheckout = false ) => {
-	const selectors = appearanceSelectors.getSelectors( isBlocksCheckout );
+export const getAppearance = ( elementsLocation ) => {
+	const selectors = appearanceSelectors.getSelectors( elementsLocation );
 
 	// Add hidden fields to DOM for generating styles.
-	hiddenElementsForUPE.init( isBlocksCheckout );
+	hiddenElementsForUPE.init( elementsLocation );
 
 	const inputRules = getFieldStyles( selectors.hiddenInput, '.Input' );
 	const inputInvalidRules = getFieldStyles(

client/checkout/upe-styles/test/index.js

@@ -119,7 +119,7 @@ describe( 'Getting styles for automated theming', () => {
 			return mockCSStyleDeclaration;
 		} );
 
-		const appearance = upeStyles.getAppearance();
+		const appearance = upeStyles.getAppearance( 'shortcode_checkout' );
 		expect( appearance ).toEqual( {
 			variables: {
 				colorBackground: '#ffffff',

client/product-details/bnpl-site-messaging/index.js

@@ -4,8 +4,31 @@
  */
 import './style.scss';
 import WCPayAPI from 'wcpay/checkout/api';
+import { getAppearance, getFontRulesFromPage } from 'wcpay/checkout/upe-styles';
+import { getUPEConfig } from 'wcpay/utils/checkout';
+import apiRequest from 'wcpay/checkout/utils/request';
 
-export const initializeBnplSiteMessaging = () => {
+/**
+ * Initializes the appearance of the payment element by retrieving the UPE configuration
+ * from the API and saving the appearance if it doesn't exist. If the appearance already exists,
+ * it is simply returned.
+ *
+ * @param {Object} api The API object used to save the UPE configuration.
+ * @return {Promise<Object>} The appearance object for the UPE.
+ */
+async function initializeAppearance( api ) {
+	const appearance = getUPEConfig( 'upeBnplProductPageAppearance' );
+	if ( appearance ) {
+		return Promise.resolve( appearance );
+	}
+
+	return await api.saveUPEAppearance(
+		getAppearance( 'bnpl_product_page' ),
+		'bnpl_product_page'
+	);
+}
+
+export const initializeBnplSiteMessaging = async () => {
 	const {
 		productVariations,
 		country,
@@ -21,17 +44,21 @@ export const initializeBnplSiteMessaging = () => {
 			accountId: accountId,
 			locale: locale,
 		},
-		null
+		apiRequest
 	);
 	const options = {
 		amount: parseInt( productVariations.base_product.amount, 10 ) || 0,
 		currency: productVariations.base_product.currency || 'USD',
 		paymentMethodTypes: paymentMethods || [],
 		countryCode: country, // Customer's country or base country of the store.
 	};
+	const elementsOptions = {
+		appearance: await initializeAppearance( api ),
+		fonts: getFontRulesFromPage(),
+	};
 	const paymentMessageElement = api
 		.getStripe()
-		.elements()
+		.elements( elementsOptions )
 		.create( 'paymentMethodMessaging', options );
 	paymentMessageElement.mount( '#payment-method-message' );
 

client/product-details/index.js

@@ -6,7 +6,7 @@
  */
 import { initializeBnplSiteMessaging } from './bnpl-site-messaging';
 
-jQuery( function ( $ ) {
+jQuery( async function ( $ ) {
 	/**
 	 * Check for the existence of the `wcpayStripeSiteMessaging` variable on the window object.
 	 * This variable holds the configuration for Stripe site messaging and contains the following keys:
@@ -34,7 +34,7 @@ jQuery( function ( $ ) {
 	const VARIATION_ID_SELECTOR = 'input[name="variation_id"]';
 
 	const quantityInput = $( QUANTITY_INPUT_SELECTOR );
-	const bnplPaymentMessageElement = initializeBnplSiteMessaging();
+	const bnplPaymentMessageElement = await initializeBnplSiteMessaging();
 	const hasVariations = Object.keys( productVariations ).length > 1;
 
 	/**

includes/class-wc-payment-gateway-wcpay.php

@@ -114,11 +114,13 @@ class WC_Payment_Gateway_WCPay extends WC_Payment_Gateway_CC {
 
 	const USER_FORMATTED_TOKENS_LIMIT = 100;
 
-	const PROCESS_REDIRECT_ORDER_MISMATCH_ERROR_CODE = 'upe_process_redirect_order_id_mismatched';
-	const UPE_APPEARANCE_TRANSIENT                   = 'wcpay_upe_appearance';
-	const WC_BLOCKS_UPE_APPEARANCE_TRANSIENT         = 'wcpay_wc_blocks_upe_appearance';
-	const UPE_APPEARANCE_THEME_TRANSIENT             = 'wcpay_upe_appearance_theme';
-	const WC_BLOCKS_UPE_APPEARANCE_THEME_TRANSIENT   = 'wcpay_wc_blocks_upe_appearance_theme';
+	const PROCESS_REDIRECT_ORDER_MISMATCH_ERROR_CODE       = 'upe_process_redirect_order_id_mismatched';
+	const UPE_APPEARANCE_TRANSIENT                         = 'wcpay_upe_appearance';
+	const WC_BLOCKS_UPE_APPEARANCE_TRANSIENT               = 'wcpay_wc_blocks_upe_appearance';
+	const UPE_BNPL_PRODUCT_PAGE_APPEARANCE_TRANSIENT       = 'wcpay_upe_bnpl_product_page_appearance';
+	const UPE_APPEARANCE_THEME_TRANSIENT                   = 'wcpay_upe_appearance_theme';
+	const WC_BLOCKS_UPE_APPEARANCE_THEME_TRANSIENT         = 'wcpay_wc_blocks_upe_appearance_theme';
+	const UPE_BNPL_PRODUCT_PAGE_APPEARANCE_THEME_TRANSIENT = 'wcpay_upe_bnpl_product_page_appearance_theme';
 
 	/**
 	 * Client for making requests to the WooCommerce Payments API
@@ -3882,19 +3884,47 @@ public function save_upe_appearance_ajax() {
 				);
 			}
 
-			$is_blocks_checkout = isset( $_POST['is_blocks_checkout'] ) ? rest_sanitize_boolean( wc_clean( wp_unslash( $_POST['is_blocks_checkout'] ) ) ) : false;
-			$appearance         = isset( $_POST['appearance'] ) ? json_decode( wc_clean( wp_unslash( $_POST['appearance'] ) ) ) : null;
+			$elements_location = isset( $_POST['elements_location'] ) ? wc_clean( wp_unslash( $_POST['elements_location'] ) ) : null;
+			$appearance        = isset( $_POST['appearance'] ) ? json_decode( wc_clean( wp_unslash( $_POST['appearance'] ) ) ) : null;
+
+			$valid_locations = [ 'blocks_checkout', 'shortcode_checkout', 'bnpl_product_page' ];
+			if ( ! $elements_location || ! in_array( $elements_location, $valid_locations, true ) ) {
+				throw new Exception(
+					__( 'Unable to update UPE appearance values at this time.', 'woocommerce-payments' )
+				);
+			}
+
+			if ( in_array( $elements_location, [ 'blocks_checkout', 'shortcode_checkout' ], true ) ) {
+				$is_blocks_checkout = 'blocks_checkout' === $elements_location;
+				/**
+				 * This filter is only called on "save" of the appearance, to avoid calling it on every page load.
+				 * If you apply changes through this filter, you'll need to clear the transient data to see them at checkout.
+				 *
+				 * @deprecated 7.4.0 Use {@see 'wcpay_elements_appearance'} instead.
+				 * @since 7.3.0
+				 */
+				$appearance = apply_filters_deprecated( 'wcpay_upe_appearance', [ $appearance, $is_blocks_checkout ], '7.4.0', 'wcpay_elements_appearance' );
+			}
 
 			/**
 			 * This filter is only called on "save" of the appearance, to avoid calling it on every page load.
 			 * If you apply changes through this filter, you'll need to clear the transient data to see them at checkout.
+			 * $elements_location can be 'blocks_checkout', 'shortcode_checkout', or 'bnpl_product_page'.
 			 *
-			 * @since 7.3.0
+			 * @since 7.4.0
 			 */
-			$appearance = apply_filters( 'wcpay_upe_appearance', $appearance, $is_blocks_checkout );
-
-			$appearance_transient       = $is_blocks_checkout ? self::WC_BLOCKS_UPE_APPEARANCE_TRANSIENT : self::UPE_APPEARANCE_TRANSIENT;
-			$appearance_theme_transient = $is_blocks_checkout ? self::WC_BLOCKS_UPE_APPEARANCE_THEME_TRANSIENT : self::UPE_APPEARANCE_THEME_TRANSIENT;
+			$appearance = apply_filters( 'wcpay_elements_appearance', $appearance, $elements_location );
+
+			$appearance_transient       = [
+				'shortcode_checkout' => self::UPE_APPEARANCE_TRANSIENT,
+				'blocks_checkout'    => self::WC_BLOCKS_UPE_APPEARANCE_TRANSIENT,
+				'bnpl_product_page'  => self::UPE_BNPL_PRODUCT_PAGE_APPEARANCE_TRANSIENT,
+			][ $elements_location ];
+			$appearance_theme_transient = [
+				'shortcode_checkout' => self::UPE_APPEARANCE_THEME_TRANSIENT,
+				'blocks_checkout'    => self::WC_BLOCKS_UPE_APPEARANCE_THEME_TRANSIENT,
+				'bnpl_product_page'  => self::UPE_BNPL_PRODUCT_PAGE_APPEARANCE_THEME_TRANSIENT,
+			][ $elements_location ];
 
 			if ( null !== $appearance ) {
 				set_transient( $appearance_transient, $appearance, DAY_IN_SECONDS );
@@ -3921,8 +3951,10 @@ public function save_upe_appearance_ajax() {
 	public function clear_upe_appearance_transient() {
 		delete_transient( self::UPE_APPEARANCE_TRANSIENT );
 		delete_transient( self::WC_BLOCKS_UPE_APPEARANCE_TRANSIENT );
+		delete_transient( self::UPE_BNPL_PRODUCT_PAGE_APPEARANCE_TRANSIENT );
 		delete_transient( self::UPE_APPEARANCE_THEME_TRANSIENT );
 		delete_transient( self::WC_BLOCKS_UPE_APPEARANCE_THEME_TRANSIENT );
+		delete_transient( self::UPE_BNPL_PRODUCT_PAGE_APPEARANCE_THEME_TRANSIENT );
 	}
 
 	/**

includes/class-wc-payments-checkout.php

@@ -211,19 +211,21 @@ public function get_payment_fields_js_config() {
 		 */
 		$payment_fields = apply_filters( 'wcpay_payment_fields_js_config', $js_config );
 
-		$payment_fields['accountDescriptor']          = $this->gateway->get_account_statement_descriptor();
-		$payment_fields['addPaymentReturnURL']        = wc_get_account_endpoint_url( 'payment-methods' );
-		$payment_fields['gatewayId']                  = WC_Payment_Gateway_WCPay::GATEWAY_ID;
-		$payment_fields['isCheckout']                 = is_checkout();
-		$payment_fields['paymentMethodsConfig']       = $this->get_enabled_payment_method_config();
-		$payment_fields['testMode']                   = WC_Payments::mode()->is_test();
-		$payment_fields['upeAppearance']              = get_transient( WC_Payment_Gateway_WCPay::UPE_APPEARANCE_TRANSIENT );
-		$payment_fields['wcBlocksUPEAppearance']      = get_transient( WC_Payment_Gateway_WCPay::WC_BLOCKS_UPE_APPEARANCE_TRANSIENT );
-		$payment_fields['wcBlocksUPEAppearanceTheme'] = get_transient( WC_Payment_Gateway_WCPay::WC_BLOCKS_UPE_APPEARANCE_THEME_TRANSIENT );
-		$payment_fields['cartContainsSubscription']   = $this->gateway->is_subscription_item_in_cart();
-		$payment_fields['currency']                   = get_woocommerce_currency();
-		$cart_total                                   = ( WC()->cart ? WC()->cart->get_total( '' ) : 0 );
-		$payment_fields['cartTotal']                  = WC_Payments_Utils::prepare_amount( $cart_total, get_woocommerce_currency() );
+		$payment_fields['accountDescriptor']                 = $this->gateway->get_account_statement_descriptor();
+		$payment_fields['addPaymentReturnURL']               = wc_get_account_endpoint_url( 'payment-methods' );
+		$payment_fields['gatewayId']                         = WC_Payment_Gateway_WCPay::GATEWAY_ID;
+		$payment_fields['isCheckout']                        = is_checkout();
+		$payment_fields['paymentMethodsConfig']              = $this->get_enabled_payment_method_config();
+		$payment_fields['testMode']                          = WC_Payments::mode()->is_test();
+		$payment_fields['upeAppearance']                     = get_transient( WC_Payment_Gateway_WCPay::UPE_APPEARANCE_TRANSIENT );
+		$payment_fields['upeBnplProductPageAppearance']      = get_transient( WC_Payment_Gateway_WCPay::UPE_BNPL_PRODUCT_PAGE_APPEARANCE_TRANSIENT );
+		$payment_fields['upeBnplProductPageAppearanceTheme'] = get_transient( WC_Payment_Gateway_WCPay::UPE_BNPL_PRODUCT_PAGE_APPEARANCE_THEME_TRANSIENT );
+		$payment_fields['wcBlocksUPEAppearance']             = get_transient( WC_Payment_Gateway_WCPay::WC_BLOCKS_UPE_APPEARANCE_TRANSIENT );
+		$payment_fields['wcBlocksUPEAppearanceTheme']        = get_transient( WC_Payment_Gateway_WCPay::WC_BLOCKS_UPE_APPEARANCE_THEME_TRANSIENT );
+		$payment_fields['cartContainsSubscription']          = $this->gateway->is_subscription_item_in_cart();
+		$payment_fields['currency']                          = get_woocommerce_currency();
+		$cart_total                  = ( WC()->cart ? WC()->cart->get_total( '' ) : 0 );
+		$payment_fields['cartTotal'] = WC_Payments_Utils::prepare_amount( $cart_total, get_woocommerce_currency() );
 
 		$enabled_billing_fields = [];
 		foreach ( WC()->checkout()->get_checkout_fields( 'billing' ) as $billing_field => $billing_field_options ) {

includes/class-wc-payments-payment-method-messaging-element.php

@@ -97,6 +97,16 @@ public function init(): string {
 			]
 		);
 
+		// Ensure wcpayConfig is available in the page.
+		$wcpay_config = rawurlencode( wp_json_encode( WC_Payments::get_wc_payments_checkout()->get_payment_fields_js_config() ) );
+		wp_add_inline_script(
+			'WCPAY_PRODUCT_DETAILS',
+			"
+			var wcpayConfig = wcpayConfig || JSON.parse( decodeURIComponent( '" . esc_js( $wcpay_config ) . "' ) );
+			",
+			'before'
+		);
+
 		return '<div id="payment-method-message"></div>';
 	}
 }