Implement LongTag

lib/nbt/Tag.dart

@@ -5,7 +5,7 @@ import 'package:libac_flutter/nbt/impl/EndTag.dart';
 import 'package:libac_flutter/nbt/impl/FloatTag.dart';
 import 'package:libac_flutter/nbt/impl/IntArrayTag.dart';
 import 'package:libac_flutter/nbt/impl/IntTag.dart';
-import 'package:libac_flutter/nbt/impl/TagLong.dart';
+import 'package:libac_flutter/nbt/impl/LongTag.dart';
 import 'package:libac_flutter/nbt/impl/TagShort.dart';
 
 import 'Stream.dart';
@@ -76,6 +76,20 @@ abstract class Tag {
     }
   }
 
+  bool equals(dynamic object) {
+    if (object == null || !(object is Tag)) return false;
+
+    Tag tag = object;
+    if (tag.getType() != getType()) return false;
+
+    if (getKey() == null && tag.getKey() != null ||
+        tag.getKey() == null && getKey() != null) return false;
+
+    if (getKey() != null && !(getKey() == tag.getKey())) return false;
+
+    return true;
+  }
+  
   static Tag makeTagOfType(TagType type) {
     switch (type) {
       case TagType.Byte:
@@ -102,7 +116,7 @@ abstract class Tag {
       case TagType.Int:
         return new IntTag();
       case TagType.Long:
-        return new TagLong(value: 0);
+        return new LongTag();
       case TagType.Float:
         return new FloatTag();
       case TagType.IntArray:
@@ -118,17 +132,4 @@ abstract class Tag {
     }
   }
 
-  bool equals(dynamic object) {
-    if (object == null || !(object is Tag)) return false;
-
-    Tag tag = object;
-    if (tag.getType() != getType()) return false;
-
-    if (getKey() == null && tag.getKey() != null ||
-        tag.getKey() == null && getKey() != null) return false;
-
-    if (getKey() != null && !(getKey() == tag.getKey())) return false;
-
-    return true;
-  }
 }

lib/nbt/impl/LongTag.dart

@@ -1,18 +1,26 @@
 import 'package:libac_flutter/nbt/Stream.dart';
 import 'package:libac_flutter/nbt/Tag.dart';
 
-class TagLong extends Tag {
+class LongTag extends Tag {
-  final int value;
+  int _value = 0;
-  TagLong({required this.value});
+  LongTag();
+
+  LongTag._(int value) {
+    _value = value;
+  }
+
+  static LongTag valueOf(int value) {
+    return LongTag._(value);
+  }
 
   @override
   void readValue(ByteLayer data) {
-    // TODO: implement readValue
+    _value = data.readLong();
   }
 
   @override
   void writeValue(ByteLayer data) {
-    // TODO: implement writeValue
+    data.writeLong(_value);
   }
 
   @override