fix: match thankyou template when using existing customer email

includes/class-modal-checkout.php

@@ -311,19 +311,27 @@ public static function get_checkout_template( $template ) {
 	/**
 	 * Return URL for modal checkout "thank you" page.
 	 *
-	 * @param string $url The URL to redirect to.
+	 * @param string   $url The URL to redirect to.
+	 * @param WC_Order $order The order related to the transaction.
 	 *
 	 * @return string
 	 */
-	public static function woocommerce_get_return_url( $url ) {
+	public static function woocommerce_get_return_url( $url, $order ) {
 		if ( ! isset( $_REQUEST['modal_checkout'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
 			return $url;
 		}
+		$args = [
+			'modal_checkout' => '1',
+			'email'          => isset( $_REQUEST['billing_email'] ) ? rawurlencode( sanitize_email( wp_unslash( $_REQUEST['billing_email'] ) ) ) : '', // phpcs:ignore WordPress.Security.NonceVerification.Recommended
+		];
+
+		// Pass order ID for modal checkout templates.
+		if ( $order && is_a( $order, 'WC_Order' ) ) {
+			$args['order_id'] = $order->get_id();
+		}
+
 		return add_query_arg(
-			[
-				'modal_checkout' => '1',
-				'email'          => isset( $_REQUEST['billing_email'] ) ? rawurlencode( sanitize_email( wp_unslash( $_REQUEST['billing_email'] ) ) ) : '', // phpcs:ignore WordPress.Security.NonceVerification.Recommended
-			],
+			$args,
 			$url
 		);
 	}
@@ -337,13 +345,18 @@ public static function woocommerce_get_return_url( $url ) {
 	 * @return string Template file.
 	 */
 	public static function wc_get_template( $located, $template_name ) {
+		if ( ! isset( $_REQUEST['modal_checkout'] ) || ! boolval( $_REQUEST['modal_checkout'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
+			return $located;
+		}
+
 		$custom_templates = [
 			'checkout/form-checkout.php' => 'src/modal-checkout/templates/checkout-form.php',
 			'checkout/form-billing.php'  => 'src/modal-checkout/templates/billing-form.php',
+			'global/form-login.php'      => 'src/modal-checkout/templates/form-login.php',
 		];
 
 		foreach ( $custom_templates as $original_template => $custom_template ) {
-			if ( $template_name === $original_template && isset( $_REQUEST['modal_checkout'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
+			if ( $template_name === $original_template ) {
 				$located = NEWSPACK_BLOCKS__PLUGIN_DIR . $custom_template;
 			}
 		}

src/modal-checkout/checkout.scss

@@ -180,6 +180,9 @@
 			transform: scale( 0 );
 			width: 40px;
 		}
+		+ .woocommerce-info {
+			display: none; // Hide the "Please log in to view this order" message on the thank you page.
+		}
 	}
 	.woocommerce-order-overview {
 		color: colors.$color__text-light;

src/modal-checkout/templates/form-login.php

@@ -0,0 +1,67 @@
+<?php
+/**
+ * Login form. WooCommerce by default doesn't allow order details to be shown
+ * if the order is completed using a customer email address that doesn't match
+ * the currently logged in user.
+ *
+ * Details: https://github.com/woocommerce/woocommerce/blob/trunk/plugins/woocommerce/includes/shortcodes/class-wc-shortcode-checkout.php#L302-L321
+ *
+ * For Newspack sites, we don't want to emphasize user account flows outside of
+ * RAS. This custom login template replaces the login form that appears on the
+ * order-received.php template with an order details summary so the experience
+ * matches whether or not the email address used is already associated with an
+ * existing customer account.
+ *
+ * @see https://docs.woocommerce.com/document/template-structure/
+ * @package WooCommerce\Templates
+ * @version 8.1.0
+ *
+ * @var WC_Order $order
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+$order = isset( $_GET['order_id'] ) ? \wc_get_order( \absint( \wp_unslash( $_GET['order_id'] ) ) ) : false; // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.WP.GlobalVariablesOverride.Prohibited
+?>
+
+<div class="woocommerce-order">
+	<?php if ( $order ) : ?>
+
+	<h4><?php esc_html_e( 'Summary', 'newspack-blocks' ); ?></h4>
+
+	<ul class="woocommerce-order-overview woocommerce-thankyou-order-details order_details">
+
+		<li class="woocommerce-order-overview__date date">
+			<?php esc_html_e( 'Date:', 'newspack-blocks' ); ?>
+			<strong><?php echo wc_format_datetime( $order->get_date_created() ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?></strong>
+		</li>
+
+		<?php if ( is_user_logged_in() && $order->get_user_id() === get_current_user_id() && $order->get_billing_email() ) : ?>
+			<li class="woocommerce-order-overview__email email">
+				<?php esc_html_e( 'Email:', 'newspack-blocks' ); ?>
+				<strong><?php echo $order->get_billing_email(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?></strong>
+			</li>
+		<?php endif; ?>
+
+		<li class="woocommerce-order-overview__total total">
+			<?php esc_html_e( 'Total:', 'newspack-blocks' ); ?>
+			<strong><?php echo $order->get_formatted_order_total(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?></strong>
+		</li>
+
+		<?php if ( $order->get_payment_method_title() ) : ?>
+			<li class="woocommerce-order-overview__payment-method method">
+				<?php esc_html_e( 'Payment method:', 'newspack-blocks' ); ?>
+				<strong><?php echo wp_kses_post( $order->get_payment_method_title() ); ?></strong>
+			</li>
+		<?php endif; ?>
+
+		<li class="woocommerce-order-overview__order order">
+			<?php esc_html_e( 'Transaction:', 'newspack-blocks' ); ?>
+			<strong><?php echo $order->get_order_number(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?></strong>
+		</li>
+
+	</ul>
+	<?php endif; ?>
+</div>