1 files changed, 27 insertions, 10 deletions
diff --git a/core/modules/system/src/SystemManager.php b/core/modules/system/src/SystemManager.php
index 5534e70147b4..43a53fe05425 100644
--- a/core/modules/system/src/SystemManager.php
+++ b/core/modules/system/src/SystemManager.php
@@ -2,11 +2,12 @@
 
 namespace Drupal\system;
 
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Extension\Requirement\RequirementSeverity;
 use Drupal\Core\Menu\MenuActiveTrailInterface;
-use Drupal\Core\Menu\MenuLinkTreeInterface;
 use Drupal\Core\Menu\MenuLinkInterface;
+use Drupal\Core\Menu\MenuLinkTreeInterface;
 use Drupal\Core\Menu\MenuTreeParameters;
-use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\StringTranslation\StringTranslationTrait;
 use Symfony\Component\HttpFoundation\RequestStack;
 
@@ -54,16 +55,31 @@ class SystemManager {
 
   /**
    * Requirement severity -- Requirement successfully met.
+   *
+   * @deprecated in drupal:11.2.0 and is removed from drupal:12.0.0. Use
+   *    \Drupal\Core\Extension\Requirement\RequirementSeverity::OK instead.
+   *
+   * @see https://www.drupal.org/node/3410939
    */
   const REQUIREMENT_OK = 0;
 
   /**
    * Requirement severity -- Warning condition; proceed but flag warning.
+   *
+   * @deprecated in drupal:11.2.0 and is removed from drupal:12.0.0. Use
+   *   \Drupal\Core\Extension\Requirement\RequirementSeverity::Warning instead.
+   *
+   * @see https://www.drupal.org/node/3410939
    */
   const REQUIREMENT_WARNING = 1;
 
   /**
    * Requirement severity -- Error condition; abort installation.
+   *
+   * @deprecated in drupal:11.2.0 and is removed from drupal:12.0.0. Use
+   *  \Drupal\Core\Extension\Requirement\RequirementSeverity::Error instead.
+   *
+   * @see https://www.drupal.org/node/3410939
    */
   const REQUIREMENT_ERROR = 2;
 
@@ -94,7 +110,7 @@ class SystemManager {
    */
   public function checkRequirements() {
     $requirements = $this->listRequirements();
-    return $this->getMaxSeverity($requirements) == static::REQUIREMENT_ERROR;
+    return RequirementSeverity::maxSeverityFromRequirements($requirements) === RequirementSeverity::Error;
   }
 
   /**
@@ -136,15 +152,16 @@ class SystemManager {
    *
    * @return int
    *   The highest severity in the array.
+   *
+   * @deprecated in drupal:11.2.0 and is removed from drupal:12.0.0. Use
+   *   \Drupal\Core\Extension\Requirement\RequirementSeverity::getMaxSeverity()
+   *   instead.
+   *
+   * @see https://www.drupal.org/node/3410939
    */
   public function getMaxSeverity(&$requirements) {
-    $severity = static::REQUIREMENT_OK;
-    foreach ($requirements as $requirement) {
-      if (isset($requirement['severity'])) {
-        $severity = max($severity, $requirement['severity']);
-      }
-    }
-    return $severity;
+    @trigger_error(__METHOD__ . '() is deprecated in drupal:11.2.0 and is removed from drupal:12.0.0. Use ' . RequirementSeverity::class . '::maxSeverityFromRequirements() instead. See https://www.drupal.org/node/3410939', \E_USER_DEPRECATED);
+    return RequirementSeverity::maxSeverityFromRequirements($requirements)->value;
   }
 
   /**