Refactor CDN assets URL to separate service

[MAILPOET-3076]

lib/Config/Renderer.php

@@ -2,7 +2,9 @@
 
 namespace MailPoet\Config;
 
+use MailPoet\DI\ContainerWrapper;
 use MailPoet\Twig;
+use MailPoet\Util\CdnAssetUrl;
 use MailPoet\WP\Functions as WPFunctions;
 use MailPoetVendor\Twig\Environment as TwigEnv;
 use MailPoetVendor\Twig\Extension\DebugExtension;
@@ -72,11 +74,10 @@ class Renderer {
   public function setupGlobalVariables() {
     $this->renderer->addExtension(new Twig\Assets([
       'version' => Env::$version,
-      'base_url' => Env::$baseUrl,
       'assets_url' => Env::$assetsUrl,
       'assets_manifest_js' => $this->assetsManifestJs,
       'assets_manifest_css' => $this->assetsManifestCss,
-    ]));
+    ], ContainerWrapper::getInstance()->get(CdnAssetUrl::class)));
   }
 
   public function setupSyntax() {

lib/DI/ContainerConfigurator.php

@@ -2,6 +2,7 @@
 
 namespace MailPoet\DI;
 
+use MailPoet\Config\Env;
 use MailPoetVendor\Psr\Container\ContainerInterface;
 use MailPoetVendor\Symfony\Component\DependencyInjection\ContainerBuilder;
 use MailPoetVendor\Symfony\Component\DependencyInjection\Reference;
@@ -310,6 +311,9 @@ class ContainerConfigurator implements IContainerConfigurator {
     $container->autowire(\MailPoet\Util\Installation::class);
     $container->autowire(\MailPoet\Util\License\Features\Subscribers::class);
     $container->autowire(\MailPoet\Util\License\License::class);
+    $container->register(\MailPoet\Util\CdnAssetUrl::class)
+      ->setPublic(true)
+      ->setFactory([__CLASS__, 'getCdnAssetsUrl']);
     // WooCommerce
     $container->autowire(\MailPoet\WooCommerce\Helper::class)->setPublic(true);
     $container->autowire(\MailPoet\WooCommerce\Settings::class)->setPublic(true);
@@ -348,4 +352,8 @@ class ContainerConfigurator implements IContainerConfigurator {
     }
     return $container->get(IContainerConfigurator::PREMIUM_CONTAINER_SERVICE_SLUG)->get($id);
   }
+
+  public static function getCdnAssetsUrl(): \MailPoet\Util\CdnAssetUrl {
+    return new \MailPoet\Util\CdnAssetUrl(Env::$baseUrl);
+  }
 }

lib/Twig/Assets.php

@@ -2,16 +2,24 @@
 
 namespace MailPoet\Twig;
 
+use MailPoet\DI\ContainerWrapper;
+use MailPoet\Util\CdnAssetUrl;
 use MailPoet\WP\Functions as WPFunctions;
 use MailPoetVendor\Twig\Extension\AbstractExtension;
 use MailPoetVendor\Twig\TwigFunction;
 
 class Assets extends AbstractExtension {
-  const CDN_URL = 'https://ps.w.org/mailpoet/';
   private $globals;
 
-  public function __construct($globals) {
+  /** @var CdnAssetUrl */
+  private $cdnAssetsUrl;
+
+  public function __construct(array $globals, CdnAssetUrl $cdnAssetsUrl = null) {
     $this->globals = $globals;
+    if ($cdnAssetsUrl === null) {
+      $cdnAssetsUrl = ContainerWrapper::getInstance()->get(CdnAssetUrl::class);
+    }
+    $this->cdnAssetsUrl = $cdnAssetsUrl;
   }
 
   public function getFunctions() {
@@ -97,7 +105,6 @@ class Assets extends AbstractExtension {
   }
 
   public function generateCdnUrl($path) {
-    $useCdn = defined('MAILPOET_USE_CDN') ? MAILPOET_USE_CDN : true;
-    return ($useCdn ? self::CDN_URL : $this->globals['base_url'] . '/plugin_repository/') . "assets/$path";
+    return $this->cdnAssetsUrl->generateCdnUrl($path);
   }
 }

lib/Util/CdnAssetUrl.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace MailPoet\Util;
+
+class CdnAssetUrl {
+  const CDN_URL = 'https://ps.w.org/mailpoet/';
+  /** @var string */
+  private $baseUrl;
+
+  public function __construct(string $baseUrl) {
+    $this->baseUrl = $baseUrl;
+  }
+
+  public function generateCdnUrl($path) {
+    $useCdn = defined('MAILPOET_USE_CDN') ? MAILPOET_USE_CDN : true;
+    return ($useCdn ? self::CDN_URL : $this->baseUrl . '/plugin_repository/') . "assets/$path";
+  }
+}

tests/integration/Twig/AssetsTest.php

@@ -3,6 +3,7 @@
 namespace MailPoet\Test\Twig;
 
 use MailPoet\Twig\Assets;
+use MailPoet\Util\CdnAssetUrl;
 
 class AssetsTest extends \MailPoetTest {
   public $assetsExtension;
@@ -19,7 +20,8 @@ class AssetsTest extends \MailPoetTest {
         'assets_manifest_js' => false,
         'assets_manifest_css' => false,
         'version' => $this->version,
-      ]
+      ],
+      new CdnAssetUrl('http://localhost/')
     );
   }
 
@@ -34,7 +36,8 @@ class AssetsTest extends \MailPoetTest {
         'assets_url' => $this->assetsUrl,
         'assets_manifest_js' => $manifest,
         'version' => $this->version,
-      ]
+      ],
+      new CdnAssetUrl('http://localhost/')
     );
 
     expect($assetsExtension->generateJavascript('script1.js', 'script2.js'))->equals(
@@ -63,7 +66,8 @@ class AssetsTest extends \MailPoetTest {
         'assets_url' => $this->assetsUrl,
         'assets_manifest_css' => $manifest,
         'version' => $this->version,
-      ]
+      ],
+      new CdnAssetUrl('http://localhost/')
     );
 
     expect($assetsExtension->generateStylesheet('style1.css', 'style2.css'))->equals(