commit 765bb58fc7
Author: Karoly Negyesi <chx1975@gmail.com>
Date:   Wed Dec 11 21:57:53 2019 -0800

    WEB-7020 validate link uris

diff --git a/docroot/modules/custom/sd8/sd8.module b/docroot/modules/custom/sd8/sd8.module
index 080b01389c..a5c49d692c 100644
--- a/docroot/modules/custom/sd8/sd8.module
+++ b/docroot/modules/custom/sd8/sd8.module
@@ -445,3 +445,10 @@ function sd8_entity_access(EntityInterface $entity, $operation, AccountInterface
   }
   return $access;
 }
+
+/**
+ * Implements hook_field_info_alter().
+ */
+function sd8_field_info_alter(&$info) {
+  $info['link']['constraints']['LinkUriValid'] = [];
+}
diff --git a/docroot/modules/custom/sd8/src/Plugin/Validation/Constraint/LinkUriValidConstraint.php b/docroot/modules/custom/sd8/src/Plugin/Validation/Constraint/LinkUriValidConstraint.php
new file mode 100644
index 0000000000..b28d094465
--- /dev/null
+++ b/docroot/modules/custom/sd8/src/Plugin/Validation/Constraint/LinkUriValidConstraint.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace Drupal\sd8\Plugin\Validation\Constraint;
+
+use Symfony\Component\Validator\Constraints\Url;
+
+/**
+ * Defines a validation constraint for links with invalid characters in the URI.
+ *
+ * @Constraint(
+ *   id = "LinkUriValid",
+ *   label = @Translation("No invalid characters in the URI field", context = "Validation"),
+ * )
+ */
+class LinkUriValidConstraint extends Url {
+
+  public $message = "The path/URL %value contains invalid characters.";
+
+}
diff --git a/docroot/modules/custom/sd8/src/Plugin/Validation/Constraint/LinkUriValidConstraintValidator.php b/docroot/modules/custom/sd8/src/Plugin/Validation/Constraint/LinkUriValidConstraintValidator.php
new file mode 100644
index 0000000000..f4241f1bdd
--- /dev/null
+++ b/docroot/modules/custom/sd8/src/Plugin/Validation/Constraint/LinkUriValidConstraintValidator.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace Drupal\sd8\Plugin\Validation\Constraint;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Constraints\UrlValidator;
+
+/**
+ * Validates the LinkUriValid constraint.
+ */
+class LinkUriValidConstraintValidator extends UrlValidator {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validate($value, Constraint $constraint) {
+    if (isset($value)) {
+      try {
+        /** @var \Drupal\Core\Url $url */
+        $url = $value->getUrl();
+        parent::validate($url->setAbsolute()->toString(), $constraint);
+      }
+      catch (\Exception $e) {
+        // This is not our job, it can be invalid internal path and more.
+      }
+    }
+  }
+
+}