Version 1

[yaffs-website] / web / core / lib / Drupal / Core / Condition / ConditionAccessResolverTrait.php

diff --git a/web/core/lib/Drupal/Core/Condition/ConditionAccessResolverTrait.php b/web/core/lib/Drupal/Core/Condition/ConditionAccessResolverTrait.php
new file mode 100644 (file)
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+++ b/web/core/lib/Drupal/Core/Condition/ConditionAccessResolverTrait.php
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+<?php
+
+namespace Drupal\Core\Condition;
+
+use Drupal\Component\Plugin\Exception\ContextException;
+
+/**
+ * Resolves a set of conditions.
+ */
+trait ConditionAccessResolverTrait {
+
+  /**
+   * Resolves the given conditions based on the condition logic ('and'/'or').
+   *
+   * @param \Drupal\Core\Condition\ConditionInterface[] $conditions
+   *   A set of conditions.
+   * @param string $condition_logic
+   *   The logic used to compute access, either 'and' or 'or'.
+   *
+   * @return bool
+   *   Whether these conditions grant or deny access.
+   */
+  protected function resolveConditions($conditions, $condition_logic) {
+    foreach ($conditions as $condition) {
+      try {
+        $pass = $condition->execute();
+      }
+      catch (ContextException $e) {
+        // If a condition is missing context and is not negated, consider that a
+        // fail.
+        $pass = $condition->isNegated();
+      }
+
+      // If a condition fails and all conditions were needed, deny access.
+      if (!$pass && $condition_logic == 'and') {
+        return FALSE;
+      }
+      // If a condition passes and only one condition was needed, grant access.
+      elseif ($pass && $condition_logic == 'or') {
+        return TRUE;
+      }
+    }
+
+    // Return TRUE if logic was 'and', meaning all rules passed.
+    // Return FALSE if logic was 'or', meaning no rule passed.
+    return $condition_logic == 'and';
+  }
+
+}