Append form bellow content

[MAILPOET-2639]

lib/Form/DisplayFormInWPContent.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace MailPoet\Form;
+
+use MailPoet\Entities\FormEntity;
+use MailPoet\WP\Functions as WPFunctions;
+
+class DisplayFormInWPContent {
+
+  /** @var WPFunctions */
+  private $wp;
+
+  /** @var FormsRepository */
+  private $formsRepository;
+
+  public function __construct(WPFunctions $wp, FormsRepository $formsRepository) {
+    $this->wp = $wp;
+    $this->formsRepository = $formsRepository;
+  }
+
+  // TODO remove transient in the api on form save
+
+  public function display(string $content): string {
+    $result = $content;
+    if (!$this->wp->isSingle()) return $result;
+    $forms = $this->formsRepository->findAll();
+    foreach ($forms as $form) {
+      $result .= $this->getContentBellow($form);
+    }
+    return $result;
+  }
+
+  private function getContentBellow(FormEntity $form): string {
+    if (!$this->shouldDisplayFormBellowContent($form)) return '';
+    return Renderer::render([
+      'body' => $form->getBody(),
+      'styles' => $form->getStyles(),
+    ]);
+  }
+
+  private function shouldDisplayFormBellowContent(FormEntity $form): bool {
+    $settings = $form->getSettings();
+    if (!is_array($settings)) return false;
+    if (!isset($settings['placeFormBellowAllPosts'])) return false;
+    if (
+      ($settings['placeFormBellowAllPosts'] === '1')
+      && !$this->wp->isPage()
+    ) return true;
+    if (
+      ($settings['placeFormBellowAllPages'] === '1')
+      && $this->wp->isPage()
+    ) return true;
+    return false;
+  }
+
+}