Refactor block registering

[MAILPOET-1798]

lib/PostEditorBlocks/PostEditorBlock.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace MailPoet\PostEditorBlocks;
+
+use MailPoet\Config\Env;
+use MailPoet\Config\Renderer;
+use MailPoet\Entities\FormEntity;
+use MailPoet\Form\FormsRepository;
+use MailPoet\Form\Widget;
+use MailPoet\WP\Functions as WPFunctions;
+
+class PostEditorBlock {
+  /** @var Renderer */
+  private $renderer;
+
+  /** @var WPFunctions */
+  private $wp;
+
+  /** @var SubscriptionFormBlock */
+  private $subscriptionFormBlock;
+
+  public function __construct(
+    Renderer $renderer,
+    WPFunctions $wp,
+    SubscriptionFormBlock $subscriptionFormBlock
+  ) {
+    $this->renderer = $renderer;
+    $this->wp = $wp;
+    $this->subscriptionFormBlock = $subscriptionFormBlock;
+  }
+
+  public function init() {
+    // this has to be here until we drop support for WordPress < 5.0
+    if (!function_exists('register_block_type')) return;
+    $this->subscriptionFormBlock->init();
+
+    if (is_admin()) {
+      $this->initAdmin();
+    } else {
+      $this->initFrontend();
+    }
+  }
+
+  private function initAdmin() {
+    $this->wp->wpEnqueueScript(
+      'mailpoet-block-form-block-js',
+      Env::$assetsUrl . '/dist/js/' . $this->renderer->getJsAsset('post_editor_block.js'),
+      ['wp-blocks', 'wp-components', 'wp-server-side-render', 'wp-block-editor'],
+      Env::$version,
+      true
+    );
+
+    $this->wp->wpEnqueueStyle(
+      'mailpoetblock-form-block-css',
+      Env::$assetsUrl . '/dist/css/' . $this->renderer->getCssAsset('post-editor-block.css'),
+      ['wp-edit-blocks'],
+      Env::$version
+    );
+
+    $this->subscriptionFormBlock->initAdmin();
+  }
+
+  private function initFrontend() {
+    $this->subscriptionFormBlock->initFrontend();
+  }
+}