Add form preview page form rendering

[MAILPOET-2743]

lib/DI/ContainerConfigurator.php

@@ -192,6 +192,7 @@ class ContainerConfigurator implements IContainerConfigurator {
     $container->autowire(\MailPoet\Form\Block\Text::class);
     $container->autowire(\MailPoet\Form\Block\Textarea::class);
     $container->autowire(\MailPoet\Form\FormFactory::class);
+    $container->autowire(\MailPoet\Form\PreviewPage::class);
     $container->autowire(\MailPoet\Form\Util\Styles::class);
     // Helpscout
     $container->autowire(\MailPoet\Helpscout\Beacon::class);

lib/Form/PreviewPage.php

@@ -0,0 +1,107 @@
+<?php
+
+namespace MailPoet\Form;
+
+use MailPoet\Config\Renderer as TemplateRenderer;
+use MailPoet\WP\Functions as WPFunctions;
+
+class PreviewPage {
+  /** @var WPFunctions  */
+  private $wp;
+
+  /** @var Renderer */
+  private $formRenderer;
+
+  /** @var TemplateRenderer */
+  private $templateRenderer;
+
+  /** @var FormsRepository */
+  private $formRepository;
+
+  /** @var AssetsController */
+  private $assetsController;
+
+  public function __construct(
+    WPFunctions $wp,
+    Renderer $formRenderer,
+    TemplateRenderer $templateRenderer,
+    FormsRepository $formRepository,
+    AssetsController $assetsController
+  ) {
+    $this->wp = $wp;
+    $this->formRenderer = $formRenderer;
+    $this->templateRenderer = $templateRenderer;
+    $this->formRepository = $formRepository;
+    $this->assetsController = $assetsController;
+  }
+
+  public function renderPage(int $formId, string $formType): string {
+    $this->assetsController->setupFrontEndDependencies();
+    $formData = $this->fetchFormData($formId);
+    if (!is_array($formData)) {
+      return '';
+    }
+    return $this->getPostContent() . $this->getFormContent($formData, $formId, $formType);
+  }
+
+  public function renderTitle() {
+    return __('Sample page to preview your form', 'mailpoet');
+  }
+
+  /**
+   * @return array|null
+   */
+  private function fetchFormData(int $id) {
+    $form = $this->formRepository->findOneById($id);
+    if ($form) {
+      return [
+        'body' => $form->getBody(),
+        'styles' => $form->getStyles(),
+        'settings' => $form->getSettings(),
+      ];
+    }
+    return null;
+  }
+
+  private function getFormContent(array $formData, int $formId, string $formType): string {
+    $htmlId = 'mailpoet_form_preview_' . $formId;
+    $templateData = [
+      'is_preview' => true,
+      'form_html_id' => $htmlId,
+      'form_id' => $formId,
+      'form_success_message' => $formData['settings']['success_message'] ?? null,
+      'form_type' => $formType,
+      'styles' => $this->formRenderer->renderStyles($formData, '#' . $htmlId),
+      'html' => $this->formRenderer->renderHTML($formData),
+      'form_element_styles' => $this->formRenderer->renderFormElementStyles($formData),
+      'success' => true,
+      'error' => true,
+      'delay' => 1,
+      'position' => $formData['settings'][$formType . '_form_position'] ?? '',
+      'backgroundColor' => $formData['settings']['backgroundColor'] ?? '',
+    ];
+    $formPosition = $formData['settings'][$formType . '_form_position'] ?? '';
+    if (!$formPosition && $formType === 'fixed_bar') {
+      $formPosition = 'top';
+    }
+    if (!$formPosition && $formType === 'slide_in') {
+      $formPosition = 'left';
+    }
+    $templateData['position'] = $formPosition;
+    return $this->templateRenderer->render('form/front_end_form.html', $templateData);
+  }
+
+  private function getPostContent(): string {
+    $posts = $this->wp->getPosts([
+      'numberposts' => 1,
+      'orderby' => 'date',
+      'order' => 'DESC',
+      'post_status' => 'publish',
+      'post_type' => 'post',
+    ]);
+    if (!isset($posts[0])) {
+      return '';
+    }
+    return $posts[0]->post_content;
+  }
+}

lib/Router/Endpoints/FormPreview.php

@@ -3,6 +3,7 @@
 namespace MailPoet\Router\Endpoints;
 
 use MailPoet\Config\AccessControl;
+use MailPoet\Form\PreviewPage;
 use MailPoet\WP\Functions as WPFunctions;
 
 class FormPreview {
@@ -15,31 +16,35 @@ class FormPreview {
   /** @var array|null */
   private $data;
 
+  /** @var PreviewPage */
+  private $formPreviewPage;
+
   public $allowedActions = [self::ACTION_VIEW];
   public $permissions = [
     'global' => AccessControl::NO_ACCESS_RESTRICTION,
   ];
 
   public function __construct(
-    WPFunctions $wp
+    WPFunctions $wp,
+    PreviewPage $formPreviewPage
   ) {
     $this->wp = $wp;
+    $this->formPreviewPage = $formPreviewPage;
   }
 
   public function view(array $data) {
     $this->data = $data;
     $this->wp->addFilter('the_content', [$this,'renderContent'], 10);
-    $this->wp->addFilter('the_title', [$this,'renderTitle'], 10);
+    $this->wp->addFilter('the_title', [$this->formPreviewPage,'renderTitle'], 10);
     $this->wp->addFilter('show_admin_bar', function () {
       return false;
     });
   }
 
   public function renderContent(): string {
-    return '<h1>Todo render form</h1>';
+    if (!isset($this->data['id']) || !isset($this->data['form_type'])) {
+      return '';
     }
-
+    return $this->formPreviewPage->renderPage((int)$this->data['id'], (string)$this->data['form_type']);
-  public function renderTitle(): string {
-    return __('Sample page to preview your form', 'mailpoet');
   }
 }