dynamically load dns-record help-text for selected dns-type; fixes #719

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>

lib/Froxlor/Ajax/Ajax.php

@@ -83,6 +83,8 @@ class Ajax
 				return $this->getConfigDetails();
 			case 'getConfigJsonExport':
 				return $this->getConfigJsonExport();
+			case 'loadLanguageString':
+				return $this->loadLanguageString();
 			default:
 				return $this->errorResponse('Action not found!');
 		}
@@ -344,4 +346,16 @@ class Ajax
 		}
 		return $this->errorResponse('Not allowed', 403);
 	}
+
+	/**
+	 * loads a given language string by its identifier
+	 */
+	private function loadLanguageString()
+	{
+		$langid = isset($_POST['langid']) ? $_POST['langid'] : "";
+		if (preg_match('/^([a-zA-Z\.]+)$/', $langid)) {
+			return $this->jsonResponse(lng($langid));
+		}
+		return $this->errorResponse('Invalid identifier: ' . $langid, 406);
+	}
 }

lib/formfields/formfield.dns_add.php

@@ -63,7 +63,8 @@ return [
 					'dns_content' => [
 						'label' => 'Content',
 						'type' => 'text',
-						'value' => $content
+						'value' => $content,
+						'note' => lng('dnseditor.notes.A')
 					],
 					'dns_ttl' => [
 						'label' => 'TTL',