From f576e349a62778432c565b8d55bccbba0e7ab897 Mon Sep 17 00:00:00 2001
From: Thomas Gelf <thomas@gelf.net>
Date: Wed, 25 Nov 2020 16:57:08 +0100
Subject: [PATCH] ArrayUnique: new PropertyModifier

fixes #2229
---
 doc/82-Changelog.md                           |  1 +
 .../PropertyModifierArrayUnique.php           | 37 +++++++++++++++++++
 register-hooks.php                            |  2 +
 3 files changed, 40 insertions(+)
 create mode 100644 library/Director/PropertyModifier/PropertyModifierArrayUnique.php

diff --git a/doc/82-Changelog.md b/doc/82-Changelog.md
index b0ad95d1..50275909 100644
--- a/doc/82-Changelog.md
+++ b/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)
diff --git a/library/Director/PropertyModifier/PropertyModifierArrayUnique.php b/library/Director/PropertyModifier/PropertyModifierArrayUnique.php
new file mode 100644
index 00000000..e3446f9d
--- /dev/null
+++ b/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));
+    }
+}
diff --git a/register-hooks.php b/register-hooks.php
index 114dafdd..db3a329e 100644
--- a/register-hooks.php
+++ b/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,