Version 1

[yaffs-website] / web / core / lib / Drupal / Core / EventSubscriber / ModuleRouteSubscriber.php

diff --git a/web/core/lib/Drupal/Core/EventSubscriber/ModuleRouteSubscriber.php b/web/core/lib/Drupal/Core/EventSubscriber/ModuleRouteSubscriber.php
new file mode 100644 (file)
index 0000000..69a22c6
--- /dev/null
+++ b/web/core/lib/Drupal/Core/EventSubscriber/ModuleRouteSubscriber.php
@@ -0,0 +1,79 @@
+<?php
+
+namespace Drupal\Core\EventSubscriber;
+
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Routing\RouteSubscriberBase;
+use Symfony\Component\Routing\RouteCollection;
+
+/**
+ * A route subscriber to remove routes that depend on modules being enabled.
+ */
+class ModuleRouteSubscriber extends RouteSubscriberBase {
+
+  /**
+   * The module handler.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
+   * Constructs a ModuleRouteSubscriber object.
+   *
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler.
+   */
+  public function __construct(ModuleHandlerInterface $module_handler) {
+    $this->moduleHandler = $module_handler;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function alterRoutes(RouteCollection $collection) {
+    foreach ($collection as $name => $route) {
+      if ($route->hasRequirement('_module_dependencies')) {
+        $modules = $route->getRequirement('_module_dependencies');
+
+        $explode_and = $this->explodeString($modules, '+');
+        if (count($explode_and) > 1) {
+          foreach ($explode_and as $module) {
+            // If any moduleExists() call returns FALSE, remove the route and
+            // move on to the next.
+            if (!$this->moduleHandler->moduleExists($module)) {
+              $collection->remove($name);
+              continue 2;
+            }
+          }
+        }
+        else {
+          // OR condition, exploding on ',' character.
+          foreach ($this->explodeString($modules, ',') as $module) {
+            if ($this->moduleHandler->moduleExists($module)) {
+              continue 2;
+            }
+          }
+          // If no modules are found, and we get this far, remove the route.
+          $collection->remove($name);
+        }
+      }
+    }
+  }
+
+  /**
+   * Explodes a string based on a separator.
+   *
+   * @param string $string
+   *   The string to explode.
+   * @param string $separator
+   *   The string separator to explode with.
+   *
+   * @return array
+   *   An array of exploded (and trimmed) values.
+   */
+  protected function explodeString($string, $separator = ',') {
+    return array_filter(array_map('trim', explode($separator, $string)));
+  }
+
+}