support for creating entries.

lib/src/kdbx_consts.dart

@@ -0,0 +1,71 @@
+enum KdbxIcon {
+  Key, // : 0,
+  World, // : 1,
+  Warning, // : 2,
+  NetworkServer, // : 3,
+  MarkedDirectory, // : 4,
+  UserCommunication, // : 5,
+  Parts, // : 6,
+  Notepad, // : 7,
+  WorldSocket, // : 8,
+  Identity, // : 9,
+  PaperReady, // : 10,
+  Digicam, // : 11,
+  IRCommunication, // : 12,
+  MultiKeys, // : 13,
+  Energy, // : 14,
+  Scanner, // : 15,
+  WorldStar, // : 16,
+  CDRom, // : 17,
+  Monitor, // : 18,
+  EMail, // : 19,
+  Configuration, // : 20,
+  ClipboardReady, // : 21,
+  PaperNew, // : 22,
+  Screen, // : 23,
+  EnergyCareful, // : 24,
+  EMailBox, // : 25,
+  Disk, // : 26,
+  Drive, // : 27,
+  PaperQ, // : 28,
+  TerminalEncrypted, // : 29,
+  Console, // : 30,
+  Printer, // : 31,
+  ProgramIcons, // : 32,
+  Run, // : 33,
+  Settings, // : 34,
+  WorldComputer, // : 35,
+  Archive, // : 36,
+  Homebanking, // : 37,
+  DriveWindows, // : 39,
+  Clock, // : 39,
+  EMailSearch, // : 40,
+  PaperFlag, // : 41,
+  Memory, // : 42,
+  TrashBin, // : 43,
+  Note, // : 44,
+  Expired, // : 45,
+  Info, // : 46,
+  Package, // : 47,
+  Folder, // : 48,
+  FolderOpen, // : 49,
+  FolderPackage, // : 50,
+  LockOpen, // : 51,
+  PaperLocked, // : 52,
+  Checked, // : 53,
+  Pen, // : 54,
+  Thumbnail, // : 55,
+  Book, // : 56,
+  List, // : 57,
+  UserKey, // : 58,
+  Tool, // : 59,
+  Home, // : 60,
+  Star, // : 61,
+  Tux, // : 62,
+  Feather, // : 63,
+  Apple, // : 64,
+  Wiki, // : 65,
+  Money, // : 66,
+  Certificate, // : 67,
+  BlackBerry, // : 68
+}

lib/src/kdbx_entry.dart

@@ -1,5 +1,6 @@
 import 'package:collection/collection.dart';
 import 'package:kdbx/src/crypto/protected_value.dart';
+import 'package:kdbx/src/kdbx_consts.dart';
 import 'package:kdbx/src/kdbx_format.dart';
 import 'package:kdbx/src/kdbx_group.dart';
 import 'package:kdbx/src/kdbx_object.dart';
@@ -23,6 +24,10 @@ class KdbxKey {
 }
 
 class KdbxEntry extends KdbxObject {
+  KdbxEntry.create(this.parent) : super.create('Entry') {
+    icon.set(KdbxIcon.Key);
+  }
+
   KdbxEntry.read(this.parent, XmlElement node) : super.read(node) {
     strings.addEntries(node.findElements('String').map((el) {
       final key = KdbxKey(el.findElements('Key').single.text);

lib/src/kdbx_group.dart

@@ -1,3 +1,4 @@
+import 'package:kdbx/src/kdbx_consts.dart';
 import 'package:kdbx/src/kdbx_entry.dart';
 import 'package:kdbx/src/kdbx_xml.dart';
 import 'package:meta/meta.dart';
@@ -8,6 +9,8 @@ import 'kdbx_object.dart';
 class KdbxGroup extends KdbxObject {
   KdbxGroup.create({@required this.parent, @required String name}) : super.create('Group') {
     this.name.set(name);
+    icon.set(KdbxIcon.Folder);
+    expanded.set(true);
   }
 
   KdbxGroup.read(this.parent, XmlElement node) : super.read(node) {
@@ -18,7 +21,7 @@ class KdbxGroup extends KdbxObject {
     node
         .findElements('Entry')
         .map((el) => KdbxEntry.read(this, el))
-        .forEach(entries.add);
+        .forEach(_entries.add);
   }
 
   /// Returns all groups plus this group itself.
@@ -33,8 +36,18 @@ class KdbxGroup extends KdbxObject {
   /// null if this is the root group.
   final KdbxGroup parent;
   final List<KdbxGroup> groups = [];
-  final List<KdbxEntry> entries = [];
+  List<KdbxEntry> get entries => List.unmodifiable(_entries);
+  final List<KdbxEntry> _entries = [];
+
+  void addEntry(KdbxEntry entry) {
+    if (entry.parent != this) {
+      throw StateError('Invalid operation. Trying to add entry which is already in another group.');
+    }
+    _entries.add(entry);
+    node.children.add(entry.node);
+  }
 
   StringNode get name => StringNode(this, 'Name');
 //  String get name => text('Name') ?? '';
+  BooleanNode get expanded => BooleanNode(this, 'IsExpanded');
 }

lib/src/kdbx_object.dart

@@ -41,6 +41,8 @@ abstract class KdbxObject extends KdbxNode {
 
   KdbxUuid get uuid => _uuid.get();
   UuidNode get _uuid => UuidNode(this, 'UUID');
+
+  IconNode get icon => IconNode(this, 'IconID');
 }
 
 class KdbxUuid {

lib/src/kdbx_xml.dart

@@ -2,6 +2,7 @@ import 'dart:convert';
 import 'dart:typed_data';
 
 import 'package:kdbx/kdbx.dart';
+import 'package:kdbx/src/kdbx_consts.dart';
 import 'package:meta/meta.dart';
 import 'package:xml/xml.dart';
 
@@ -30,12 +31,15 @@ abstract class KdbxSubTextNode<T> extends KdbxSubNode<T> {
 
   @override
   T get() {
-    return decode(_opt(name)?.text);
+    final textValue = _opt(name)?.text;
+    if (textValue == null) {
+      return null;
+    }
+    return decode(textValue);
   }
 
   @override
   void set(T value) {
-    final stringValue = encode(value);
     final el =
     node.node.findElements(name).singleWhere((x) => true, orElse: () {
       final el = XmlElement(XmlName(name));
@@ -43,6 +47,13 @@ abstract class KdbxSubTextNode<T> extends KdbxSubNode<T> {
       return el;
     });
     el.children.clear();
+    if (value == null) {
+      return;
+    }
+    final stringValue = encode(value);
+    if (stringValue == null) {
+      return;
+    }
     el.children.add(XmlText(stringValue));
   }
 }
@@ -76,3 +87,31 @@ class UuidNode extends KdbxSubTextNode<KdbxUuid> {
   @override
   String encode(KdbxUuid value) => value.uuid;
 }
+
+class IconNode extends KdbxSubTextNode<KdbxIcon> {
+  IconNode(KdbxNode node, String name) : super(node, name);
+
+  @override
+  KdbxIcon decode(String value) => KdbxIcon.values[int.tryParse(value)];
+
+  @override
+  String encode(KdbxIcon value) => value.index.toString();
+}
+
+class BooleanNode extends KdbxSubTextNode<bool> {
+  BooleanNode(KdbxNode node, String name) : super(node, name);
+
+  @override
+  bool decode(String value) {
+    switch (value) {
+      case 'null': return null;
+      case 'true': return true;
+      case 'false': return false;
+    }
+    throw KdbxCorruptedFileException('Invalid boolean value $value for $name');
+  }
+
+  @override
+  String encode(bool value) => value ? 'true' : 'false';
+
+}

test/kdbx_test.dart

@@ -30,5 +30,11 @@ void main() {
       expect(kdbx.body.meta.databaseName.get(), 'CreateTest');
       print(kdbx.body.toXml().toXmlString(pretty: true));
     });
+    test('Create Entry', () {
+      final kdbx = KdbxFormat.create(Credentials(ProtectedValue.fromString('FooBar')), 'CreateTest');
+      final rootGroup = kdbx.body.rootGroup;
+      rootGroup.addEntry(KdbxEntry.create(rootGroup));
+      print(kdbx.body.toXml().toXmlString(pretty: true));
+    });
   });
 }