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wp-content/plugins/mailpoet/lib/Config/AssetsLoader.php

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+<?php // phpcs:ignore SlevomatCodingStandard.TypeHints.DeclareStrictTypes.DeclareStrictTypesMissing
+
+namespace MailPoet\Config;
+
+if (!defined('ABSPATH')) exit;
+
+
+use MailPoet\WP\Functions as WPFunctions;
+
+class AssetsLoader {
+
+  /** @var Renderer */
+  private $renderer;
+
+  /** @var WPFunctions */
+  private $wp;
+
+  public function __construct(
+    RendererFactory $rendererFactory,
+    WPFunctions $wp
+  ) {
+    $this->renderer = $rendererFactory->getRenderer();
+    $this->wp = $wp;
+  }
+
+  public function loadStyles(): void {
+    // MailPoet plugin style should be loaded on all mailpoet sites
+    $page = isset($_GET['page']) ? sanitize_text_field(wp_unslash($_GET['page'])) : null;
+    if ($page && strpos($page, 'mailpoet-') === 0) {
+      $this->enqueueStyle('mailpoet-plugin', [
+        'forms', // To prevent conflict in CSS with WP forms we need to add dependency
+        'buttons',
+      ]);
+    }
+    if ($page === 'mailpoet-form-editor') {
+      // Form-editor CSS has to be loaded after plugin style because it contains @wordpress/components dependency
+      $this->enqueueStyle('mailpoet-form-editor', ['mailpoet-plugin']);
+      $this->enqueueStyle('mailpoet-public');
+    }
+    // We reuse a part of CSS in the newsletter editor
+    if ($page === 'mailpoet-newsletter-editor') {
+      // Newsletter-editor CSS has to be loaded after plugin style because it contains @wordpress/components dependency
+      $this->enqueueStyle('mailpoet-form-editor', ['mailpoet-plugin']);
+    }
+  }
+
+  private function enqueueStyle(string $name, array $deps = []): void {
+    $this->wp->wpEnqueueStyle(
+      $name,
+      Env::$assetsUrl . '/dist/css/' . $this->renderer->getCssAsset("{$name}.css"),
+      $deps
+    );
+  }
+}