Render email content in the editor and pass rendered HTML output to the emails custom post-type template

MAILPOET-6323

packages/php/email-editor/src/Engine/Templates/single-email-post-template.php

@@ -0,0 +1,13 @@
+<?php
+/**
+ * This file is part of the MailPoet Email Editor package.
+ * Template canvas file to render the emails custom post type.
+ *
+ * @package MailPoet\EmailEditor
+ */
+
+// get the rendered post HTML content.
+$template_html = apply_filters( 'mailpoet_email_editor_preview_post_template_html', get_post() );
+
+// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
+echo $template_html;

packages/php/email-editor/src/Engine/Templates/single-post-template.php

@@ -1,45 +0,0 @@
-<?php
-/**
- * This file is part of the MailPoet plugin.
- * Template canvas file to render the emails custom post type.
- *
- * @package MailPoet\EmailEditor
- */
-
-use MailPoet\DI\ContainerWrapper;
-use MailPoet\EmailEditor\Engine\Renderer\Renderer;
-
-/***
- * Generate html content for email editor post.
- *
- * @return string
- * @throws \Exception If the post is invalid.
- */
-function mee_get_rendered_html(): string {
-	$post = get_post();
-
-	if ( ! $post instanceof \WP_Post ) {
-		throw new \Exception( esc_html__( 'Invalid post', 'mailpoet' ) );
-	}
-
-	$subject  = $post->post_title;
-	$language = get_bloginfo( 'language' );
-
-	$renderer = ContainerWrapper::getInstance()->get( Renderer::class ); // TODO: Update implementation.
-
-	$rendered_data = $renderer->render(
-		$post,
-		$subject,
-		__( 'Preview', 'mailpoet' ),
-		$language
-	);
-
-	return $rendered_data['html'];
-}
-
-
-$template_html = mee_get_rendered_html();
-
-// We control those templates.
-// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
-echo $template_html;

packages/php/email-editor/src/Engine/class-email-editor.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * This file is part of the MailPoet plugin.
+ * This file is part of the MailPoet Email Editor package.
  *
  * @package MailPoet\EmailEditor
  */
@@ -282,16 +282,18 @@ class Email_Editor {
 
 		$email_post_types = array_column( $this->get_post_types(), 'name' );
 
-		if ( in_array( $current_post_type, $email_post_types, true ) && locate_template( array( "single-$current_post_type.php" ) ) !== $template ) {
-			/*
-			 * This is an email post
-			 * AND a 'single $post_type template' is not found on
-			 * theme or child theme directories, so load it
-			 * from our plugin directory.
-			 */
-			return __DIR__ . '/Templates/single-post-template.php';
+		if ( ! in_array( $current_post_type, $email_post_types, true ) ) {
+			return $template;
 		}
 
-		return $template;
+		add_filter(
+			'mailpoet_email_editor_preview_post_template_html',
+			function ( $post ) {
+				// Generate HTML content for email editor post.
+				return $this->send_preview_email->render_html( $post );
+			}
+		);
+
+		return __DIR__ . '/Templates/single-email-post-template.php';
 	}
 }