Add WelcomeWizard page class

[MAILPOET-2200]

lib/AdminPages/Pages/WelcomeWizard.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace MailPoet\AdminPages\Pages;
+
+use MailPoet\AdminPages\PageRenderer;
+use MailPoet\Config\Menu;
+use MailPoet\Config\MP2Migrator;
+use MailPoet\Settings\SettingsController;
+use MailPoet\WooCommerce\Helper as WooCommerceHelper;
+use MailPoet\WP\Functions as WPFunctions;
+
+if (!defined('ABSPATH')) exit;
+
+class WelcomeWizard {
+  /** @var PageRenderer */
+  private $page_renderer;
+
+  /** @var SettingsController */
+  private $settings;
+
+  /** @var WooCommerceHelper */
+  private $woocommerce_helper;
+
+  /** @var WPFunctions */
+  private $wp;
+
+  function __construct(
+    PageRenderer $page_renderer,
+    SettingsController $settings,
+    WooCommerceHelper $woocommerce_helper,
+    WPFunctions $wp
+  ) {
+    $this->page_renderer = $page_renderer;
+    $this->settings = $settings;
+    $this->woocommerce_helper = $woocommerce_helper;
+    $this->wp = $wp;
+  }
+
+  function render() {
+    if ((bool)(defined('DOING_AJAX') && DOING_AJAX)) return;
+    $data = [
+      'is_mp2_migration_complete' => (bool)$this->settings->get(MP2Migrator::MIGRATION_COMPLETE_SETTING_KEY),
+      'is_woocommerce_active' => $this->woocommerce_helper->isWooCommerceActive(),
+      'finish_wizard_url' => $this->wp->adminUrl('admin.php?page=' . Menu::MAIN_PAGE_SLUG),
+      'sender' => $this->settings->get('sender'),
+      'admin_email' => get_option('admin_email'),
+    ];
+    $this->page_renderer->displayPage('welcome_wizard.html', $data);
+  }
+}