1 files changed, 112 insertions, 0 deletions
diff --git a/library/Director/PropertyModifier/PropertyModifierDnsRecords.php b/library/Director/PropertyModifier/PropertyModifierDnsRecords.php
new file mode 100644
index 0000000..d5d8d41
--- /dev/null
+++ b/library/Director/PropertyModifier/PropertyModifierDnsRecords.php
@@ -0,0 +1,112 @@
+<?php
+
+namespace Icinga\Module\Director\PropertyModifier;
+
+use Icinga\Exception\InvalidPropertyException;
+use Icinga\Module\Director\Hook\PropertyModifierHook;
+use Icinga\Module\Director\Web\Form\QuickForm;
+
+class PropertyModifierDnsRecords extends PropertyModifierHook
+{
+    protected static $types = array(
+        'A'     => DNS_A,
+        'AAAA'  => DNS_AAAA,
+        'CNAME' => DNS_CNAME,
+        'MX'    => DNS_MX,
+        'NS'    => DNS_NS,
+        'PTR'   => DNS_PTR,
+        'TXT'   => DNS_TXT,
+    );
+
+    public static function addSettingsFormFields(QuickForm $form)
+    {
+        $form->addElement('select', 'record_type', array(
+            'label'        => 'Record type',
+            'description'  => $form->translate('DNS record type'),
+            'multiOptions' => $form->optionalEnum(static::enumTypes()),
+            'required'    => true,
+        ));
+
+        $form->addElement('select', 'on_failure', array(
+            'label'        => 'On failure',
+            'description'  => $form->translate('What should we do if the DNS lookup fails?'),
+            'multiOptions' => $form->optionalEnum(array(
+                'null' => $form->translate('Set no value (null)'),
+                'keep' => $form->translate('Keep the property as is'),
+                'fail' => $form->translate('Let the whole import run fail'),
+            )),
+            'required'    => true,
+        ));
+    }
+
+    protected static function enumTypes()
+    {
+        $types = array_keys(self::$types);
+        return array_combine($types, $types);
+    }
+
+    public function getName()
+    {
+        return 'Get DNS records of a specific type';
+    }
+
+    public function transform($value)
+    {
+        if ($value === null) {
+            return null;
+        }
+
+        $type = self::$types[$this->getSetting('record_type')];
+        $response = dns_get_record($value, $type);
+
+        if ($response === false) {
+            switch ($this->getSetting('on_failure')) {
+                case 'null':
+                    return null;
+                case 'keep':
+                    return $value;
+                case 'fail':
+                default:
+                    throw new InvalidPropertyException(
+                        'DNS lookup failed for "%s"',
+                        $value
+                    );
+            }
+        }
+
+        $result = array();
+        switch ($type) {
+            case DNS_A:
+                return $this->extractProperty('ip', $response);
+            case DNS_AAAA:
+                return $this->extractProperty('ipv6', $response);
+            case DNS_CNAME:
+            case DNS_MX:
+            case DNS_NS:
+            case DNS_PTR:
+                return $this->extractProperty('target', $response);
+            case DNS_TXT:
+                return $this->extractProperty('txt', $response);
+                return $response;
+        }
+
+        return $result;
+    }
+
+    protected function extractProperty($key, $response)
+    {
+        $result = array();
+        foreach ($response as $entry) {
+            $result[] = $entry[$key];
+        }
+
+        if (version_compare(PHP_VERSION, '5.4.0') >= 0) {
+            sort($result, SORT_NATURAL);
+        } else {
+            natsort($result);
+            $result = array_values($result);
+        }
+
+        return $result;
+    }
+}