SkipDuplicates: new property modifier

fixes #2215

doc/82-Changelog.md

@@ -28,6 +28,7 @@ next (will be 1.8.0)
 * FEATURE: New Property Modifier: ListToObject (#2062)
 * FEATURE: Property Modifier: convert binary UUID to HEX presentation (#2138)
 * FEATURE: Property Modifier: get Host by Address (#2210)
+* FEATURE: Property Modifier: skip duplicates (#2215)
 * FEATURE: Import Sources now allow to download previewed data as JSON (#2096)
 * FEATURE: UTF8 validation for failed imports gives better error message (#2143)
 * FIX: LDAP Import is now able to paginate limited results (#2019)

library/Director/PropertyModifier/PropertyModifierSkipDuplicates.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Icinga\Module\Director\PropertyModifier;
+
+use Icinga\Module\Director\Hook\PropertyModifierHook;
+
+class PropertyModifierSkipDuplicates extends PropertyModifierHook
+{
+    private $seen = [];
+
+    public function getName()
+    {
+        return mt('director', 'Skip row if this value appears more than once');
+    }
+
+    public function transform($value)
+    {
+        if (isset($this->seen[$value])) {
+            $this->rejectRow();
+        }
+
+        $this->seen[$value] = true;
+
+        return $value;
+    }
+}

register-hooks.php

@@ -41,6 +41,7 @@ use Icinga\Module\Director\PropertyModifier\PropertyModifierRegexReplace;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierRegexSplit;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierRejectOrSelect;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierReplace;
+use Icinga\Module\Director\PropertyModifier\PropertyModifierSkipDuplicates;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierSplit;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierStripDomain;
 use Icinga\Module\Director\PropertyModifier\PropertyModifierSubstring;
@@ -105,6 +106,7 @@ $directorHooks = [
         PropertyModifierRegexSplit::class,
         PropertyModifierRejectOrSelect::class,
         PropertyModifierReplace::class,
+        PropertyModifierSkipDuplicates::class,
         PropertyModifierSplit::class,
         PropertyModifierStripDomain::class,
         PropertyModifierSubstring::class,