Port NBT impl from LibAC Dart

NBT/IntArrayTag.cs

@@ -0,0 +1,76 @@
+using System;
+using System.Collections.Generic;
+using LibAC.NBT.API;
+
+namespace LibAC.NBT
+{
+    public class IntArrayTag : Tag
+    {
+        public List<int> Value { get; private set; } = new List<int>();
+
+        public IntArrayTag() { }
+
+        private IntArrayTag(List<int> value)
+        {
+            this.Value.AddRange(value);
+        }
+
+        public static IntArrayTag ValueOf(List<int> value)
+        {
+            return new IntArrayTag(value);
+        }
+
+        public override void ReadValue(ByteLayer data)
+        {
+            int count = data.ReadInt();
+            for (int i = 0; i < count; i++)
+            {
+                Value.Add(data.ReadInt());
+            }
+        }
+
+        public override void WriteValue(ByteLayer data)
+        {
+            data.WriteInt(Value.Count);
+            foreach (int i in Value)
+            {
+                data.WriteInt(i);
+            }
+        }
+
+        public override TagType GetTagType()
+        {
+            return TagType.IntArray;
+        }
+
+        public override void SetValue(dynamic val) { }
+
+        public override dynamic GetValue() { return null; }
+
+        public override void PrettyPrint(int indent, bool recurse)
+        {
+            string array = string.Join(", ", Value);
+            Console.WriteLine($"{new string('\t', indent)}{Tag.GetCanonicalName(GetTagType())}: [{array}]");
+        }
+
+        public override void WriteStringifiedValue(StringBuilder builder, int indent, bool isList)
+        {
+            builder.Append($"{(isList ? new string('\t', indent) : "")}[I; {string.Join("I, ", Value)}I]");
+        }
+
+        public override void ReadStringifiedValue(StringReader reader)
+        {
+            reader.Expect('[');
+            reader.Expect('I');
+            reader.Expect(';');
+            while (reader.Peek() != ']')
+            {
+                Value.Add(int.Parse(reader.ReadNumber()));
+
+                if (reader.Peek() == ',')
+                    reader.Next();
+            }
+            reader.Expect('I');
+        }
+    }
+}