From 5ccf14d349b6657094ed5aa05b655cf459f7e2fa Mon Sep 17 00:00:00 2001
From: Herbert Poul <herbert@poul.at>
Date: Fri, 30 Aug 2019 18:01:15 +0200
Subject: [PATCH] added support for renaming fields, deleting fields.

---
 lib/src/kdbx_entry.dart | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/lib/src/kdbx_entry.dart b/lib/src/kdbx_entry.dart
index 153e320..94e53bc 100644
--- a/lib/src/kdbx_entry.dart
+++ b/lib/src/kdbx_entry.dart
@@ -117,14 +117,27 @@ class KdbxEntry extends KdbxObject {
   StringValue getString(KdbxKey key) => _strings[key];
 
   void setString(KdbxKey key, StringValue value) {
+    assert(key != null);
     if (_strings[key] == value) {
       _logger.finest('Value did not change for $key');
       return;
     }
     isDirty = true;
-    _strings[key] = value;
+    if (value == null) {
+      _strings.remove(key);
+    } else {
+      _strings[key] = value;
+    }
+  }
+  
+  void renameKey(KdbxKey oldKey, KdbxKey newKey) {
+    final value = _strings[oldKey];
+    removeString(oldKey);
+    _strings[newKey] = value;
   }
 
+  void removeString(KdbxKey key) => setString(key, null);
+
   String _plainValue(KdbxKey key) {
     final value = _strings[key];
     if (value is PlainValue) {