adding a couple of meta data fields. should now include almost all from keepass.

lib/src/kdbx_header.dart

@@ -22,6 +22,9 @@ class Consts {
   static const DefaultKdfIterations = 2;
   static const DefaultKdfMemory = 1024 * 1024;
   static const DefaultKdfVersion = 0x13;
+
+  static const DefaultHistoryMaxItems = 20;
+  static const DefaultHistoryMaxSize = 10 * 1024 * 1024;
 }
 
 enum Compression {

lib/src/kdbx_meta.dart

@@ -24,8 +24,14 @@ class KdbxMeta extends KdbxNode implements KdbxNodeContext {
         _customIcons = {},
         super.create('Meta') {
     this.databaseName.set(databaseName);
+    databaseDescription.set(null, force: true);
+    defaultUserName.set(null, force: true);
     this.generator.set(generator ?? 'kdbx.dart');
     settingsChanged.setToNow();
+    masterKeyChanged.setToNow();
+    recycleBinChanged.setToNow();
+    historyMaxItems.set(Consts.DefaultHistoryMaxItems);
+    historyMaxSize.set(Consts.DefaultHistoryMaxSize);
   }
 
   KdbxMeta.read(xml.XmlElement node, this.ctx)
@@ -83,13 +89,30 @@ class KdbxMeta extends KdbxNode implements KdbxNodeContext {
 
   StringNode get generator => StringNode(this, 'Generator');
 
-  StringNode get databaseName => StringNode(this, 'DatabaseName');
+  StringNode get databaseName => StringNode(this, 'DatabaseName')
+    ..setOnModifyListener(() => databaseNameChanged.setToNow());
+  DateTimeUtcNode get databaseNameChanged =>
+      DateTimeUtcNode(this, 'DatabaseNameChanged');
+
+  StringNode get databaseDescription => StringNode(this, 'DatabaseDescription')
+    ..setOnModifyListener(() => databaseDescriptionChanged.setToNow());
+  DateTimeUtcNode get databaseDescriptionChanged =>
+      DateTimeUtcNode(this, 'DatabaseDescriptionChanged');
+
+  StringNode get defaultUserName => StringNode(this, 'DefaultUserName')
+    ..setOnModifyListener(() => defaultUserNameChanged.setToNow());
+  DateTimeUtcNode get defaultUserNameChanged =>
+      DateTimeUtcNode(this, 'DefaultUserNameChanged');
+
+  DateTimeUtcNode get masterKeyChanged =>
+      DateTimeUtcNode(this, 'MasterKeyChanged');
 
   Base64Node get headerHash => Base64Node(this, 'HeaderHash');
 
   BooleanNode get recycleBinEnabled => BooleanNode(this, 'RecycleBinEnabled');
 
-  UuidNode get recycleBinUUID => UuidNode(this, 'RecycleBinUUID');
+  UuidNode get recycleBinUUID => UuidNode(this, 'RecycleBinUUID')
+    ..setOnModifyListener(() => recycleBinChanged.setToNow());
 
   DateTimeUtcNode get settingsChanged =>
       DateTimeUtcNode(this, 'SettingsChanged');
@@ -97,6 +120,19 @@ class KdbxMeta extends KdbxNode implements KdbxNodeContext {
   DateTimeUtcNode get recycleBinChanged =>
       DateTimeUtcNode(this, 'RecycleBinChanged');
 
+  UuidNode get entryTemplatesGroup => UuidNode(this, 'EntryTemplatesGroup')
+    ..setOnModifyListener(() => entryTemplatesGroupChanged.setToNow());
+  DateTimeUtcNode get entryTemplatesGroupChanged =>
+      DateTimeUtcNode(this, 'EntryTemplatesGroupChanged');
+
+  IntNode get historyMaxItems => IntNode(this, 'HistoryMaxItems');
+
+  /// max size of history in bytes.
+  IntNode get historyMaxSize => IntNode(this, 'HistoryMaxSize');
+
+  /// not sure what this node is supposed to do actually.
+  IntNode get maintenanceHistoryDays => IntNode(this, 'MaintenanceHistoryDays');
+
 //  void addCustomIcon
 
   @override

lib/src/kdbx_xml.dart

@@ -77,6 +77,8 @@ extension on List<XmlNode> {
 abstract class KdbxSubTextNode<T> extends KdbxSubNode<T> {
   KdbxSubTextNode(KdbxNode node, String name) : super(node, name);
 
+  void Function() _onModify;
+
   @protected
   String encode(T value);
 
@@ -87,6 +89,10 @@ abstract class KdbxSubTextNode<T> extends KdbxSubNode<T> {
       .findElements(nodeName)
       .singleWhere((x) => true, orElse: () => null);
 
+  void setOnModifyListener(void Function() onModify) {
+    _onModify = onModify;
+  }
+
   @override
   T get() {
     final textValue = _opt(name)?.text;
@@ -97,8 +103,8 @@ abstract class KdbxSubTextNode<T> extends KdbxSubNode<T> {
   }
 
   @override
-  void set(T value) {
-    if (get() == value) {
+  void set(T value, {bool force = false}) {
+    if (get() == value && force != true) {
       return;
     }
     node.modify(() {
@@ -118,6 +124,7 @@ abstract class KdbxSubTextNode<T> extends KdbxSubNode<T> {
       }
       el.children.add(XmlText(stringValue));
     });
+    _onModify?.call();
   }
 
   @override