diff core/lib/Drupal/Core/Theme/ThemeAccessCheck.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Theme/ThemeAccessCheck.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,58 @@
+<?php
+
+namespace Drupal\Core\Theme;
+
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Extension\ThemeHandlerInterface;
+use Drupal\Core\Routing\Access\AccessInterface;
+
+/**
+ * Provides access checking for themes for routing and theme negotiation.
+ */
+class ThemeAccessCheck implements AccessInterface {
+
+  /**
+   * The theme handler.
+   *
+   * @var \Drupal\Core\Extension\ThemeHandlerInterface
+   */
+  protected $themeHandler;
+
+  /**
+   * Constructs a \Drupal\Core\Theme\Registry object.
+   *
+   * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
+   *   The theme handler.
+   */
+  public function __construct(ThemeHandlerInterface $theme_handler) {
+    $this->themeHandler = $theme_handler;
+  }
+  /**
+   * Checks access to the theme for routing.
+   *
+   * @param string $theme
+   *   The name of a theme.
+   *
+   * @return \Drupal\Core\Access\AccessResultInterface
+   *   The access result.
+   */
+  public function access($theme) {
+    // Cacheable until the theme settings are modified.
+    return AccessResult::allowedIf($this->checkAccess($theme))->addCacheTags(['config:' . $theme . '.settings']);
+  }
+
+  /**
+   * Indicates whether the theme is accessible based on whether it is installed.
+   *
+   * @param string $theme
+   *   The name of a theme.
+   *
+   * @return bool
+   *   TRUE if the theme is installed, FALSE otherwise.
+   */
+  public function checkAccess($theme) {
+    $themes = $this->themeHandler->listInfo();
+    return !empty($themes[$theme]->status);
+  }
+
+}