PropertyModifier: negate boolean

fixes #2227

doc/82-Changelog.md

@@ -30,7 +30,8 @@ next (will be 1.8.0)
 * FEATURE: Property Modifier: get Host by Address (#2210)
 * FEATURE: Property Modifier: skip duplicates (#2215)
 * FEATURE: Property Modifier: trim strings (#1660)
-* FEATURE: Import Sources now allow to download previewed data as JSON (#2096)
+* FEATURE: Property Modifier: negate boolean (#2227)
+* FEATURE: Import Sources now allows downloading previewed data as JSON (#2096)
 * FEATURE: UTF8 validation for failed imports gives better error message (#2143)
 * FEATURE: ArrayByElementPosition now allows filtering by key name (#1721)
 * FIX: LDAP Import is now able to paginate limited results (#2019)

library/Director/PropertyModifier/PropertyModifierNegateBoolean.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Icinga\Module\Director\PropertyModifier;
+
+use Icinga\Module\Director\Hook\PropertyModifierHook;
+use function ipl\Stdlib\get_php_type;
+
+class PropertyModifierNegateBoolean extends PropertyModifierHook
+{
+    public function getName()
+    {
+        return 'Negate a boolean value';
+    }
+
+    public function transform($value)
+    {
+        if ($value === null) {
+            return true;
+        }
+        if (! is_bool($value)) {
+            throw new \InvalidArgumentException('Boolean expected, got ' . get_php_type($value));
+        }
+
+        return ! $value;
+    }
+}

register-hooks.php

@@ -36,6 +36,7 @@ use Icinga\Module\Director\PropertyModifier\PropertyModifierListToObject;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierLowercase;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierMakeBoolean;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierMap;
+use Icinga\Module\Director\PropertyModifier\PropertyModifierNegateBoolean;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierParseURL;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierRegexReplace;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierRegexSplit;
@@ -102,6 +103,7 @@ $directorHooks = [
         PropertyModifierLowercase::class,
         PropertyModifierMakeBoolean::class,
         PropertyModifierMap::class,
+        PropertyModifierNegateBoolean::class,
         PropertyModifierParseURL::class,
         PropertyModifierRegexReplace::class,
         PropertyModifierRegexSplit::class,