Move simple-light template from the engine/package to the free plugin

The additional templates are registered by integrators.
This way, we will be able to use assets like images from MailPoet's CDN
and also various services from the plugins (e.g. CdnAssetsController)
[MAILPOET-6356]

mailpoet/lib/DI/ContainerConfigurator.php

@@ -368,6 +368,7 @@ class ContainerConfigurator implements IContainerConfigurator {
     $container->autowire(\MailPoet\EmailEditor\Integrations\MailPoet\PersonalizationTags\Site::class)->setPublic(true);
     $container->autowire(\MailPoet\EmailEditor\Integrations\MailPoet\PersonalizationTags\Subscriber::class)->setPublic(true);
     $container->autowire(\MailPoet\EmailEditor\Integrations\MailPoet\PersonalizationTagManager::class)->setPublic(true);
+    $container->autowire(\MailPoet\EmailEditor\Integrations\MailPoet\Templates\TemplatesController::class)->setPublic(true);
     // Features
     $container->autowire(\MailPoet\Features\FeaturesController::class)->setPublic(true);
     $container->autowire(\MailPoet\Features\FeatureFlagsController::class)->setPublic(true);

mailpoet/lib/EmailEditor/Integrations/MailPoet/EmailEditor.php

@@ -3,6 +3,7 @@
 namespace MailPoet\EmailEditor\Integrations\MailPoet;
 
 use MailPoet\EmailEditor\Integrations\MailPoet\Patterns\PatternsController;
+use MailPoet\EmailEditor\Integrations\MailPoet\Templates\TemplatesController;
 use MailPoet\Features\FeaturesController;
 use MailPoet\WP\Functions as WPFunctions;
 
@@ -25,6 +26,8 @@ class EmailEditor {
 
   private PersonalizationTagManager $personalizationTagManager;
 
+  private TemplatesController $templatesController;
+
   public function __construct(
     WPFunctions $wp,
     FeaturesController $featuresController,
@@ -32,6 +35,7 @@ class EmailEditor {
     EditorPageRenderer $editorPageRenderer,
     EmailEditorPreviewEmail $emailEditorPreviewEmail,
     PatternsController $patternsController,
+    TemplatesController $templatesController,
     Cli $cli,
     PersonalizationTagManager $personalizationTagManager
   ) {
@@ -40,6 +44,7 @@ class EmailEditor {
     $this->emailApiController = $emailApiController;
     $this->editorPageRenderer = $editorPageRenderer;
     $this->patternsController = $patternsController;
+    $this->templatesController = $templatesController;
     $this->cli = $cli;
     $this->emailEditorPreviewEmail = $emailEditorPreviewEmail;
     $this->personalizationTagManager = $personalizationTagManager;
@@ -56,6 +61,7 @@ class EmailEditor {
     $this->wp->addFilter('replace_editor', [$this, 'replaceEditor'], 10, 2);
     $this->wp->addFilter('mailpoet_email_editor_send_preview_email', [$this->emailEditorPreviewEmail, 'sendPreviewEmail'], 10, 1);
     $this->patternsController->registerPatterns();
+    $this->templatesController->initialize();
     $this->extendEmailPostApi();
     $this->personalizationTagManager->initialize();
   }

mailpoet/lib/EmailEditor/Integrations/MailPoet/Templates/TemplatesController.php

@@ -0,0 +1,39 @@
+<?php declare(strict_types = 1);
+
+namespace MailPoet\EmailEditor\Integrations\MailPoet\Templates;
+
+use MailPoet\EmailEditor\Integrations\MailPoet\EmailEditor;
+use MailPoet\WP\Functions as WPFunctions;
+
+class TemplatesController {
+  private string $templatePrefix = 'mailpoet';
+  private WPFunctions $wp;
+
+  public function __construct(
+    WPFunctions $wp
+  ) {
+    $this->wp = $wp;
+  }
+
+  public function initialize() {
+    $this->wp->addAction('mailpoet_email_editor_register_templates', [$this, 'registerTemplates'], 10, 0);
+  }
+
+  public function registerTemplates() {
+    $simpleLight = [
+      'title' => __('Simple Light', 'mailpoet'),
+      'description' => __('A basic template with header and footer.', 'mailpoet'),
+      'slug' => 'simple-light',
+      'filename' => 'simple-light.html',
+    ];
+    register_block_template(
+      $this->templatePrefix . '//' . $simpleLight['slug'],
+      [
+        'title' => $simpleLight['title'],
+        'description' => $simpleLight['description'],
+        'content' => (string)file_get_contents(__DIR__ . '/' . $simpleLight['filename']),
+        'post_types' => [EmailEditor::MAILPOET_EMAIL_POST_TYPE],
+      ]
+    );
+  }
+}

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

@@ -33,12 +33,6 @@ class Templates {
 	 * @var string $template_directory
 	 */
 	private string $template_directory = __DIR__ . DIRECTORY_SEPARATOR;
-	/**
-	 * The templates.
-	 *
-	 * @var array $templates
-	 */
-	private array $templates = array();
 
 	/**
 	 * Initializes the class.
@@ -69,27 +63,24 @@ class Templates {
 		if ( ! function_exists( 'register_block_template' ) ) {
 			return;
 		}
-		$this->templates['email-general'] = array(
+		// Register basic blank template.
+		$general_email     = array(
 			'title'       => __( 'General Email', 'mailpoet' ),
 			'description' => __( 'A general template for emails.', 'mailpoet' ),
+			'slug'        => 'email-general',
 		);
-		$this->templates['simple-light']  = array(
+		$template_filename = $general_email['slug'] . '.html';
-			'title'       => __( 'Simple Light', 'mailpoet' ),
-			'description' => __( 'A basic template with header and footer.', 'mailpoet' ),
-		);
 
-		foreach ( $this->templates as $template_slug => $template ) {
-			$template_filename = $template_slug . '.html';
 		register_block_template(
-				$this->template_prefix . '//' . $template_slug,
+			$this->template_prefix . '//' . $general_email['slug'],
 			array(
-					'title'       => $template['title'],
+				'title'       => $general_email['title'],
-					'description' => $template['description'],
+				'description' => $general_email['description'],
 				'content'     => (string) file_get_contents( $this->template_directory . $template_filename ),
 				'post_types'  => array( $this->post_type ),
 			)
 		);
-		}
+
 		do_action( 'mailpoet_email_editor_register_templates' );
 	}