SNBT Serialization now implemented

lib/nbt/Stream.dart

@@ -383,6 +383,8 @@ class StringBuilder {
 
   StringBuilder();
 
+  bool get isEmpty => _buffer.isEmpty;
+
   void append(String value) {
     _buffer += value;
   }

lib/nbt/Tag.dart

@@ -85,7 +85,7 @@ abstract class Tag {
   static void writeStringifiedNamedTag(
       Tag tag, StringBuilder builder, int indents) {
     if (tag.getType() != 0) {
-      if (builder != "") {
+      if (!builder.isEmpty) {
         // Write name
         if (tag.shouldQuoteName()) {
           builder.append("${"".padLeft(indents, "\t")}\"${tag.getKey()}\": ");
@@ -93,7 +93,7 @@ abstract class Tag {
           builder.append("${"".padLeft(indents, '\t')}${tag.getKey()}: ");
       }
 
-      tag.writeStringifiedValue(builder, indents + 1);
+      tag.writeStringifiedValue(builder, indents + 1, false);
     }
   }
 
@@ -112,7 +112,7 @@ abstract class Tag {
     }
   }
 
-  void writeStringifiedValue(StringBuilder builder, int indent);
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList);
 
   bool equals(dynamic object) {
     if (object == null || object is! Tag) return false;

lib/nbt/impl/ByteArrayTag.dart

@@ -48,7 +48,8 @@ class ByteArrayTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
-    builder.append("[B; ${value.join("B, ")}B]");
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
+    builder.append(
+        "${isList ? "".padLeft(indent, '\t') : ""}[B; ${value.join("B, ")}B]");
   }
 }

lib/nbt/impl/ByteTag.dart

@@ -36,7 +36,7 @@ class ByteTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
     builder.append("${value}b");
   }
 }

lib/nbt/impl/CompoundTag.dart

@@ -87,9 +87,9 @@ class CompoundTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
     Iterator<Tag> it = value.values.iterator;
-    builder.append("{\n");
+    builder.append("${isList ? "".padLeft(indent - 1, '\t') : ""}{\n");
 
     bool firstEntry = true;
     while (it.moveNext()) {
@@ -101,6 +101,6 @@ class CompoundTag extends Tag {
       }
       Tag.writeStringifiedNamedTag(t, builder, indent);
     }
-    builder.append("\n${"".padLeft(indent - 1, '\t')}}\n");
+    builder.append("\n${"".padLeft(indent - 1, '\t')}}");
   }
 }

lib/nbt/impl/DoubleTag.dart

@@ -36,7 +36,7 @@ class DoubleTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
-    builder.append("${value}d");
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
+    builder.append("${isList ? "".padLeft(indent, '\t') : ""}${value}d");
   }
 }

lib/nbt/impl/EndTag.dart

@@ -21,5 +21,5 @@ class EndTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {}
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {}
 }

lib/nbt/impl/FloatTag.dart

@@ -35,7 +35,7 @@ class FloatTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
-    builder.append("${value}f");
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
+    builder.append("${isList ? "".padLeft(indent, '\t') : ""}${value}f");
   }
 }

lib/nbt/impl/IntArrayTag.dart

@@ -47,7 +47,8 @@ class IntArrayTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
-    builder.append("[I; ${value.join('I, ')}I]");
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
+    builder.append(
+        "${isList ? "".padLeft(indent, '\t') : ""}[I; ${value.join('I, ')}I]");
   }
 }

lib/nbt/impl/IntTag.dart

@@ -35,7 +35,7 @@ class IntTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
-    builder.append("${value}i");
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
+    builder.append("${isList ? "".padLeft(indent, '\t') : ""}${value}i");
   }
 }

lib/nbt/impl/ListTag.dart

@@ -88,7 +88,20 @@ class ListTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
-    builder.append("[\n");
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
+    builder.append("${isList ? "".padLeft(indent - 1, '\t') : ""}[\n");
+    Iterator<Tag> it = value.iterator;
+    bool firstTag = true;
+    while (it.moveNext()) {
+      Tag tag = it.current;
+      if (firstTag)
+        firstTag = !firstTag;
+      else {
+        builder.append(",\n");
+      }
+
+      tag.writeStringifiedValue(builder, indent + 1, true);
+    }
+    builder.append("\n${"".padLeft(indent - 1, '\t')}]");
   }
 }

lib/nbt/impl/LongArrayTag.dart

@@ -51,7 +51,8 @@ class LongArrayTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
-    builder.append("[L; ${value.join('L, ')}L]");
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
+    builder.append(
+        "${isList ? "".padLeft(indent, '\t') : ""}[L; ${value.join('L, ')}L]");
   }
 }

lib/nbt/impl/LongTag.dart

@@ -35,7 +35,7 @@ class LongTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
-    builder.append("${value}L");
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
+    builder.append("${isList ? "".padLeft(indent, '\t') : ""}${value}L");
   }
 }

lib/nbt/impl/ShortTag.dart

@@ -35,7 +35,7 @@ class ShortTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
-    builder.append("${value}S");
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
+    builder.append("${isList ? "".padLeft(indent, '\t') : ""}${value}S");
   }
 }

lib/nbt/impl/StringTag.dart

@@ -35,7 +35,7 @@ class StringTag extends Tag {
   }
 
   @override
-  void writeStringifiedValue(StringBuilder builder, int indent) {
-    builder.append("\"${value}\"");
+  void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
+    builder.append("${isList ? "".padLeft(indent, '\t') : ""}\"${value}\"");
   }
 }

test/nbt_test.dart

@@ -65,4 +65,12 @@ void main() {
     Tag.writeStringifiedNamedTag(ct, sb, 0);
     print(sb.toString());
   });
+
+  test("Read BigTest, Output to SNBT", () async {
+    CompoundTag ct =
+        await NbtIo.read("${Directory.current.path}/test/bigtest.nbt");
+    StringBuilder sb = StringBuilder();
+    Tag.writeStringifiedNamedTag(ct, sb, 0);
+    print(sb.toString());
+  });
 }