diff core/lib/Drupal/Core/Access/CheckProvider.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Access/CheckProvider.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,168 @@
+<?php
+
+namespace Drupal\Core\Access;
+
+use Drupal\Core\Routing\Access\AccessInterface;
+use Symfony\Component\DependencyInjection\ContainerAwareInterface;
+use Symfony\Component\DependencyInjection\ContainerAwareTrait;
+use Symfony\Component\Routing\Route;
+use Symfony\Component\Routing\RouteCollection;
+
+/**
+ * Loads access checkers from the container.
+ */
+class CheckProvider implements CheckProviderInterface, ContainerAwareInterface {
+
+  use ContainerAwareTrait;
+
+  /**
+   * Array of registered access check service ids.
+   *
+   * @var array
+   */
+  protected $checkIds = [];
+
+  /**
+   * Array of access check objects keyed by service id.
+   *
+   * @var \Drupal\Core\Routing\Access\AccessInterface[]
+   */
+  protected $checks;
+
+  /**
+   * Array of access check method names keyed by service ID.
+   *
+   * @var array
+   */
+  protected $checkMethods = [];
+
+  /**
+   * Array of access checks which only will be run on the incoming request.
+   */
+  protected $checksNeedsRequest = [];
+
+  /**
+   * An array to map static requirement keys to service IDs.
+   *
+   * @var array
+   */
+  protected $staticRequirementMap;
+
+  /**
+   * An array to map dynamic requirement keys to service IDs.
+   *
+   * @var array
+   */
+  protected $dynamicRequirementMap;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function addCheckService($service_id, $service_method, array $applies_checks = [], $needs_incoming_request = FALSE) {
+    $this->checkIds[] = $service_id;
+    $this->checkMethods[$service_id] = $service_method;
+    if ($needs_incoming_request) {
+      $this->checksNeedsRequest[$service_id] = $service_id;
+    }
+    foreach ($applies_checks as $applies_check) {
+      $this->staticRequirementMap[$applies_check][] = $service_id;
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getChecksNeedRequest() {
+    return $this->checksNeedsRequest;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setChecks(RouteCollection $routes) {
+    $this->loadDynamicRequirementMap();
+    foreach ($routes as $route) {
+      if ($checks = $this->applies($route)) {
+        $route->setOption('_access_checks', $checks);
+      }
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function loadCheck($service_id) {
+    if (empty($this->checks[$service_id])) {
+      if (!in_array($service_id, $this->checkIds)) {
+        throw new \InvalidArgumentException(sprintf('No check has been registered for %s', $service_id));
+      }
+
+      $check = $this->container->get($service_id);
+
+      if (!($check instanceof AccessInterface)) {
+        throw new AccessException('All access checks must implement AccessInterface.');
+      }
+      if (!is_callable([$check, $this->checkMethods[$service_id]])) {
+        throw new AccessException(sprintf('Access check method %s in service %s must be callable.', $this->checkMethods[$service_id], $service_id));
+      }
+
+      $this->checks[$service_id] = $check;
+    }
+    return [$this->checks[$service_id], $this->checkMethods[$service_id]];
+  }
+
+  /**
+   * Determine which registered access checks apply to a route.
+   *
+   * @param \Symfony\Component\Routing\Route $route
+   *   The route to get list of access checks for.
+   *
+   * @return array
+   *   An array of service ids for the access checks that apply to passed
+   *   route.
+   */
+  protected function applies(Route $route) {
+    $checks = [];
+
+    // Iterate through map requirements from appliesTo() on access checkers.
+    // Only iterate through all checkIds if this is not used.
+    foreach ($route->getRequirements() as $key => $value) {
+      if (isset($this->staticRequirementMap[$key])) {
+        foreach ($this->staticRequirementMap[$key] as $service_id) {
+          $checks[] = $service_id;
+        }
+      }
+    }
+    // Finally, see if any dynamic access checkers apply.
+    foreach ($this->dynamicRequirementMap as $service_id) {
+      if ($this->checks[$service_id]->applies($route)) {
+        $checks[] = $service_id;
+      }
+    }
+
+    return $checks;
+  }
+  /**
+   * Compiles a mapping of requirement keys to access checker service IDs.
+   */
+  protected function loadDynamicRequirementMap() {
+    if (isset($this->dynamicRequirementMap)) {
+      return;
+    }
+
+    // Set them here, so we can use the isset() check above.
+    $this->dynamicRequirementMap = [];
+
+    foreach ($this->checkIds as $service_id) {
+      if (empty($this->checks[$service_id])) {
+        $this->loadCheck($service_id);
+      }
+
+      // Add the service ID to an array that will be iterated over.
+      if ($this->checks[$service_id] instanceof AccessCheckInterface) {
+        $this->dynamicRequirementMap[] = $service_id;
+      }
+    }
+  }
+
+}