Add assets url factory method to form template

[MAILPOET-3076]

lib/Form/Templates/FormTemplate.php

@@ -3,6 +3,7 @@
 namespace MailPoet\Form\Templates;
 
 use MailPoet\Entities\FormEntity;
+use MailPoet\Util\CdnAssetUrl;
 
 abstract class FormTemplate {
   const DEFAULT_STYLES = <<<EOL
@@ -79,6 +80,16 @@ abstract class FormTemplate {
 }
 EOL;
 
+  /** @var CdnAssetUrl */
+  protected $cdnAssetUrl;
+
+  /** @var string */
+  protected $assetsDirectory = '';
+
+  public function __construct(CdnAssetUrl $cdnAssetUrl) {
+    $this->cdnAssetUrl = $cdnAssetUrl;
+  }
+
   abstract public function getName(): string;
 
   abstract public function getBody(): array;
@@ -103,4 +114,8 @@ EOL;
     $formEntity->setStyles($this->getStyles());
     return $formEntity;
   }
+
+  protected function getAssetUrl(string $filename): string {
+    return $this->cdnAssetUrl->generateCdnUrl("form-templates/{$this->assetsDirectory}/$filename");
+  }
 }

lib/Form/Templates/TemplateRepository.php

@@ -25,11 +25,15 @@ use MailPoet\Form\Templates\Templates\Template6Popup;
 use MailPoet\Form\Templates\Templates\Template6SlideIn;
 use MailPoet\Form\Templates\Templates\Template6Widget;
 use MailPoet\UnexpectedValueException;
+use MailPoet\Util\CdnAssetUrl;
 
 class TemplateRepository {
   const INITIAL_FORM_TEMPLATE = InitialForm::ID;
   const DEFAULT_FORM_TEMPLATE = DefaultForm::ID;
 
+  /** @var CdnAssetUrl */
+  private $cdnAssetUrl;
+
   private $templates = [
     InitialForm::ID => InitialForm::class,
     DefaultForm::ID => DefaultForm::class,
@@ -55,13 +59,17 @@ class TemplateRepository {
     Template10Widget::ID => Template10Widget::class,
   ];
 
+  public function __construct(CdnAssetUrl $cdnAssetUrl) {
+    $this->cdnAssetUrl = $cdnAssetUrl;
+  }
+
   public function getFormTemplate(string $templateId): FormTemplate {
     if (!isset($this->templates[$templateId])) {
       throw UnexpectedValueException::create()
         ->withErrors(["Template with id $templateId doesn't exist."]);
     }
     /** @var FormTemplate $template */
-    $template = new $this->templates[$templateId]();
+    $template = new $this->templates[$templateId]($this->cdnAssetUrl);
     return $template;
   }
 

tests/unit/Form/Templates/TemplatesRepositoryTest.php

@@ -4,6 +4,7 @@ namespace MailPoet\Test\Form\Templates;
 
 use MailPoet\Form\Templates\FormTemplate;
 use MailPoet\Form\Templates\TemplateRepository;
+use MailPoet\Util\CdnAssetUrl;
 
 class TemplatesRepositoryTest extends \MailPoetUnitTest {
   /** @var TemplateRepository */
@@ -11,7 +12,10 @@ class TemplatesRepositoryTest extends \MailPoetUnitTest {
 
   public function _before() {
     parent::_before();
-    $this->repository = new TemplateRepository();
+    $cdnAssetsMock = $this->createMock(CdnAssetUrl::class);
+    $cdnAssetsMock->method('generateCdnUrl')
+      ->willReturn('http://example.com/image.png');
+    $this->repository = new TemplateRepository($cdnAssetsMock);
   }
 
   public function testItCanBuildFormTemplate() {