Finished basic implementation

lib/nbt/Tag.dart

@@ -20,16 +20,11 @@ enum TagType {
 }
 
 abstract class Tag {
-  late TagType type;
-
   int getType() {
-    return type.byte;
+    return getTagType().byte;
-  }
-
-  TagType getTagType() {
-    return type;
   }
 
+  TagType getTagType();
   void writeValue(ByteLayer data);
   void readValue(ByteLayer data);
 }

lib/nbt/impl/ByteTag.dart

@@ -4,9 +4,7 @@ import 'package:libac_flutter/nbt/Tag.dart';
 class ByteTag extends Tag {
   final int value;
 
-  ByteTag({required this.value}) {
+  ByteTag({required this.value});
-    type = TagType.Byte;
-  }
 
   @override
   void readValue(ByteLayer data) {
@@ -17,4 +15,9 @@ class ByteTag extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  @override
+  TagType getTagType() {
+    return TagType.Byte;
+  }
 }

lib/nbt/impl/TagByteArray.dart

@@ -3,9 +3,7 @@ import 'package:libac_flutter/nbt/Tag.dart';
 
 class TagByteArray extends Tag {
   final List<int> value;
-  TagByteArray({required this.value}) {
+  TagByteArray({required this.value});
-    type = TagType.ByteArray;
-  }
 
   @override
   void readValue(ByteLayer data) {
@@ -16,4 +14,9 @@ class TagByteArray extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  @override
+  TagType getTagType() {
+    return TagType.ByteArray;
+  }
 }

lib/nbt/impl/TagCompound.dart

@@ -6,7 +6,6 @@ class TagCompound extends Tag {
 
   TagCompound() {
     _value = new Map();
-    type = TagType.Compound;
   }
 
   @override
@@ -18,4 +17,30 @@ class TagCompound extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  void put(String name, Tag tag) {
+    _value[name] = tag;
+  }
+
+  bool contains(String name) {
+    return _value.containsKey(name);
+  }
+
+  Tag? get(String name) {
+    if (contains(name))
+      return _value[name] as Tag;
+    else {
+      // Does not exist!
+      return null;
+    }
+  }
+
+  void remove(String name) {
+    _value.remove(name);
+  }
+
+  @override
+  TagType getTagType() {
+    return TagType.Compound;
+  }
 }

lib/nbt/impl/TagDouble.dart

@@ -3,9 +3,7 @@ import 'package:libac_flutter/nbt/Tag.dart';
 
 class TagDouble extends Tag {
   final double value;
-  TagDouble({required this.value}) {
+  TagDouble({required this.value});
-    type = TagType.Float;
-  }
 
   @override
   void readValue(ByteLayer data) {
@@ -16,4 +14,9 @@ class TagDouble extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  @override
+  TagType getTagType() {
+    return TagType.Double;
+  }
 }

lib/nbt/impl/TagEnd.dart

@@ -2,13 +2,16 @@ import 'package:libac_flutter/nbt/Stream.dart';
 import 'package:libac_flutter/nbt/Tag.dart';
 
 class TagEnd extends Tag {
-  TagEnd() {
+  TagEnd();
-    type = TagType.End;
-  }
 
   @override
   void readValue(ByteLayer data) {}
 
   @override
   void writeValue(ByteLayer data) {}
+
+  @override
+  TagType getTagType() {
+    return TagType.End;
+  }
 }

lib/nbt/impl/TagFloat.dart

@@ -3,9 +3,7 @@ import 'package:libac_flutter/nbt/Tag.dart';
 
 class TagFloat extends Tag {
   final double value;
-  TagFloat({required this.value}) {
+  TagFloat({required this.value});
-    type = TagType.Float;
-  }
 
   @override
   void readValue(ByteLayer data) {
@@ -16,4 +14,9 @@ class TagFloat extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  @override
+  TagType getTagType() {
+    return TagType.Float;
+  }
 }

lib/nbt/impl/TagInt.dart

@@ -3,9 +3,7 @@ import 'package:libac_flutter/nbt/Tag.dart';
 
 class TagInt extends Tag {
   final int value;
-  TagInt({required this.value}) {
+  TagInt({required this.value});
-    type = TagType.Int;
-  }
 
   @override
   void readValue(ByteLayer data) {
@@ -16,4 +14,9 @@ class TagInt extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  @override
+  TagType getTagType() {
+    return TagType.Int;
+  }
 }

lib/nbt/impl/TagIntArray.dart

@@ -3,9 +3,7 @@ import 'package:libac_flutter/nbt/Tag.dart';
 
 class TagIntArray extends Tag {
   final List<int> value;
-  TagIntArray({required this.value}) {
+  TagIntArray({required this.value});
-    type = TagType.IntArray;
-  }
 
   @override
   void readValue(ByteLayer data) {
@@ -16,4 +14,9 @@ class TagIntArray extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  @override
+  TagType getTagType() {
+    return TagType.IntArray;
+  }
 }

lib/nbt/impl/TagList.dart

@@ -3,8 +3,9 @@ import 'package:libac_flutter/nbt/Tag.dart';
 
 class TagList extends Tag {
   late final List<Tag> _value;
+  TagType _internalType = TagType.End;
+
   TagList() {
-    type = TagType.List;
     _value = List.empty(growable: true);
   }
 
@@ -17,4 +18,33 @@ class TagList extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  void add(Tag tag) {
+    if (_internalType == TagType.End) {
+      _value.clear();
+      _value.add(tag);
+      _internalType = tag.getTagType();
+    } else {
+      if (_internalType == tag.getTagType()) {
+        _value.add(tag);
+      }
+    }
+  }
+
+  void remove(Tag tag) {
+    _value.remove(tag);
+  }
+
+  void removeAt(int index) {
+    _value.removeAt(index);
+  }
+
+  int indexOf(Tag tag) {
+    return _value.indexOf(tag);
+  }
+
+  @override
+  TagType getTagType() {
+    return TagType.List;
+  }
 }

lib/nbt/impl/TagLong.dart

@@ -3,9 +3,7 @@ import 'package:libac_flutter/nbt/Tag.dart';
 
 class TagLong extends Tag {
   final int value;
-  TagLong({required this.value}) {
+  TagLong({required this.value});
-    type = TagType.Long;
-  }
 
   @override
   void readValue(ByteLayer data) {
@@ -16,4 +14,9 @@ class TagLong extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  @override
+  TagType getTagType() {
+    return TagType.Long;
+  }
 }

lib/nbt/impl/TagLongArray.dart

@@ -3,9 +3,7 @@ import 'package:libac_flutter/nbt/Tag.dart';
 
 class TagLongArray extends Tag {
   final List<int> value;
-  TagLongArray({required this.value}) {
+  TagLongArray({required this.value});
-    type = TagType.LongArray;
-  }
 
   @override
   void readValue(ByteLayer data) {
@@ -16,4 +14,9 @@ class TagLongArray extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  @override
+  TagType getTagType() {
+    return TagType.LongArray;
+  }
 }

lib/nbt/impl/TagShort.dart

@@ -3,9 +3,7 @@ import 'package:libac_flutter/nbt/Tag.dart';
 
 class TagShort extends Tag {
   final int value;
-  TagShort({required this.value}) {
+  TagShort({required this.value});
-    type = TagType.Short;
-  }
 
   @override
   void readValue(ByteLayer data) {
@@ -16,4 +14,9 @@ class TagShort extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  @override
+  TagType getTagType() {
+    return TagType.Short;
+  }
 }

lib/nbt/impl/TagString.dart

@@ -3,9 +3,7 @@ import 'package:libac_flutter/nbt/Tag.dart';
 
 class TagString extends Tag {
   final String value;
-  TagString({required this.value}) {
+  TagString({required this.value});
-    type = TagType.String;
-  }
 
   @override
   void readValue(ByteLayer data) {
@@ -16,4 +14,9 @@ class TagString extends Tag {
   void writeValue(ByteLayer data) {
     // TODO: implement writeValue
   }
+
+  @override
+  TagType getTagType() {
+    return TagType.String;
+  }
 }