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Editing: BlockEmailRenderer.php

<?php
declare( strict_types=1 );

namespace Automattic\WooCommerce\Internal\EmailEditor;

use Automattic\WooCommerce\EmailEditor\Email_Editor_Container;
use Automattic\WooCommerce\EmailEditor\Engine\Personalizer;
use Automattic\WooCommerce\EmailEditor\Engine\Renderer\Renderer as EmailRenderer;
use Automattic\WooCommerce\Internal\EmailEditor\WCTransactionalEmails\WCTransactionalEmailPostsManager;

/**
 * Class responsible for rendering block-based emails.
 */
class BlockEmailRenderer {
	const WOO_EMAIL_CONTENT_PLACEHOLDER = '##WOO_CONTENT##';

/**
	 * Service for rendering block emails
	 *
	 * @var EmailRenderer
	 */
	private $renderer;

/**
	 * Service for personalization of emails
	 * It replaces personalization tags with actual values
	 *
	 * @var Personalizer
	 */
	private $personalizer;

/**
	 * Service for extracting WooCommerce content from WC_Email object.
	 *
	 * @var WooContentProcessor
	 */
	private $woo_content_processor;

/**
	 * WooCommerce Email Template Manager instance.
	 *
	 * @var WCTransactionalEmailPostsManager
	 */
	private $template_manager;

/**
	 * Constructor.
	 */
	public function __construct() {
		$editor_container       = Email_Editor_Container::container();
		$this->renderer         = $editor_container->get( EmailRenderer::class );
		$this->personalizer     = $editor_container->get( Personalizer::class );
		$this->template_manager = WCTransactionalEmailPostsManager::get_instance();
	}

/**
	 * Initialize the renderer.
	 *
	 * @param WooContentProcessor $woo_content_processor Service for extracting WooCommerce content from WC_Email object.
	 * @internal
	 */
	final public function init( WooContentProcessor $woo_content_processor ): void {
		$this->woo_content_processor = $woo_content_processor;
		add_action( 'woocommerce_email_blocks_renderer_initialized', array( $this, 'register_block_renderers' ) );
	}

/**
	 * Maybe render block-based email content.
	 *
	 * @param \WC_Email $wc_email WooCommerce email.
	 * @return string|null Modified email content
	 */
	public function maybe_render_block_email( \WC_Email $wc_email ): ?string {
		$email_post = $this->get_email_post_by_wc_email( $wc_email );
		if ( ! $email_post ) {
			return null;
		}

$woo_content = $this->woo_content_processor->get_woo_content( $wc_email );
		return $this->render_block_email( $email_post, $woo_content, $wc_email );
	}

/**
	 * Maybe render block-based email content.
	 *
	 * @param \WP_Post  $email_post Email post.
	 * @param string    $woo_content WooCommerce email content.
	 * @param \WC_Email $wc_email WooCommerce email.
	 * @return string Modified email content
	 */
	private function render_block_email( \WP_Post $email_post, string $woo_content, \WC_Email $wc_email ): ?string {
		try {
			// Set email context before rendering so blocks can access it.
			$filter_callback = function ( $context = array() ) use ( $wc_email ) {
				return array_merge( $context, $this->build_email_context( $wc_email ) );
			};
			add_filter( 'woocommerce_email_editor_rendering_email_context', $filter_callback, 10, 1 );

$subject             = $wc_email->get_subject(); // We will get subject from $email_post after we add it to the editor.
			$preheader           = $wc_email->get_preheader();
			$rendered_email_data = $this->renderer->render( $email_post, $subject, $preheader, 'en' );
			$personalized_email  = $this->personalizer->personalize_content( $rendered_email_data['html'] );
			$rendered_email      = str_replace( self::WOO_EMAIL_CONTENT_PLACEHOLDER, $woo_content, $personalized_email );

// Remove the filter after rendering to prevent context leakage.
			remove_filter( 'woocommerce_email_editor_rendering_email_context', $filter_callback );

add_filter( 'woocommerce_email_styles', array( $this->woo_content_processor, 'prepare_css' ), 10, 2 );
			return $rendered_email;
		} catch ( \Exception $e ) {
			wc_caught_exception( $e, __METHOD__, array( $email_post, $woo_content, $wc_email ) );
			// Remove the filter in case of exception.
			if ( isset( $filter_callback ) ) {
				remove_filter( 'woocommerce_email_editor_rendering_email_context', $filter_callback );
			}
			return null;
		}
	}

/**
	 * Get the email post for a given WC_Email.
	 *
	 * @param \WC_Email $email WooCommerce email.
	 * @return \WP_Post|null
	 */
	private function get_email_post_by_wc_email( \WC_Email $email ): ?\WP_Post {
		return $this->template_manager->get_email_post( $email->id );
	}

/**
	 * Build email context from WC_Email object.
	 *
	 * Extracts relevant context data from the WC_Email object that can be used
	 * by blocks during rendering, such as user ID, email address, order information, etc.
	 *
	 * Blocks that need cart product information can derive it from the user_id or email
	 * using CartCheckoutUtils::get_cart_product_ids_for_user().
	 *
	 * @param \WC_Email $wc_email WooCommerce email object.
	 * @return array Email context data.
	 */
	private function build_email_context( \WC_Email $wc_email ): array {
		$recipient_raw = $wc_email->get_recipient();
		$emails        = array_values( array_filter( array_map( 'sanitize_email', array_map( 'trim', explode( ',', $recipient_raw ) ) ) ) );
		$context       = array(
			'recipient_email' => $emails[0] ?? null,
		);

// Extract order-related context if the email object is an order.
		if ( isset( $wc_email->object ) && $wc_email->object instanceof \WC_Order ) {
			$order              = $wc_email->object;
			$context['user_id'] = $order->get_customer_id();
		}

return $context;
	}
}