ArrayUnique: new PropertyModifier

fixes #2229

doc/82-Changelog.md

@@ -43,6 +43,7 @@ next (will be 1.8.0)
 * FEATURE: Property Modifier: negate boolean (#2227)
 * FEATURE: Property Modifier Reject/Select: improve usability (#2228)
 * FEATURE: Property Modifier: clone rows for every entry of an Array (#2192)
+* FEATURE: Property Modifier: unique array values (#2229)
 * FEATURE: Import Sources now allows downloading previewed data as JSON (#2096)
 * FEATURE: REST API Import now allows custom headers (#2132)
 * FEATURE: REST API Import can now extract nested properties (#2132)

library/Director/PropertyModifier/PropertyModifierArrayUnique.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Icinga\Module\Director\PropertyModifier;
+
+use Icinga\Exception\InvalidPropertyException;
+use Icinga\Module\Director\Hook\PropertyModifierHook;
+use function array_unique;
+use function array_values;
+use function is_array;
+
+class PropertyModifierArrayUnique extends PropertyModifierHook
+{
+    public function getName()
+    {
+        return 'Unique Array Values';
+    }
+
+    public function hasArraySupport()
+    {
+        return true;
+    }
+
+    public function transform($value)
+    {
+        if (empty($value)) {
+            return $value;
+        }
+
+        if (! is_array($value)) {
+            throw new InvalidPropertyException(
+                'The ArrayUnique property modifier can be applied to arrays only'
+            );
+        }
+
+        return array_values(array_unique($value));
+    }
+}

register-hooks.php

@@ -20,6 +20,7 @@ use Icinga\Module\Director\Job\SyncJob;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierArrayElementByPosition;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierArrayFilter;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierArrayToRow;
+use Icinga\Module\Director\PropertyModifier\PropertyModifierArrayUnique;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierBitmask;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierCombine;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierDnsRecords;
@@ -87,6 +88,7 @@ $directorHooks = [
         PropertyModifierArrayElementByPosition::class,
         PropertyModifierArrayFilter::class,
         PropertyModifierArrayToRow::class,
+        PropertyModifierArrayUnique::class,
         PropertyModifierBitmask::class,
         PropertyModifierCombine::class,
         PropertyModifierDnsRecords::class,