feat: add permission to allow default nbt (#3053)

* feat: add permission to allow default nbt
 - closes #3044

* Existing nbt permission should allow default nbt

Author: dordsor21

worldedit-core/src/main/java/com/sk89q/jnbt/Tag.java

@@ -64,6 +64,16 @@ public Object toRaw() {
     }
 
     public abstract int getTypeCode();
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (!this.getClass().equals(o.getClass())) {
+            return false;
+        }
+        return linTag.equals(((Tag<?, ?>) o).linTag);
+    }
     //FAWE end
 
 }

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/parser/DefaultBlockParser.java

@@ -538,15 +538,20 @@ private BaseBlock parseLogic(String input, ParserContext context) throws InputPa
             //FAWE end
         }
 
-        if (DeprecationUtil.isSign(blockType)) {
+        //FAWE start - only handle if extra data is actually supplied or if the user has permission for nbt
+        boolean allowWorkingDefault = context.requireActor().hasPermission("worldedit.anyblock.nbt") && nbt != null;
+        if (DeprecationUtil.isSign(blockType) && (blockAndExtraData.length > 1 || allowWorkingDefault)) {
+            //FAWE end
             // Allow special sign text syntax
             String[] text = new String[4];
             text[0] = blockAndExtraData.length > 1 ? blockAndExtraData[1] : "";
             text[1] = blockAndExtraData.length > 2 ? blockAndExtraData[2] : "";
             text[2] = blockAndExtraData.length > 3 ? blockAndExtraData[3] : "";
             text[3] = blockAndExtraData.length > 4 ? blockAndExtraData[4] : "";
             return validate(context, new SignBlock(state, text));
-        } else if (blockType == BlockTypes.SPAWNER && (blockAndExtraData.length > 1 || nbt != null)) {
+            //FAWE start - only handle if extra data is actually supplied or if the user has permission for nbt
+        } else if (blockType == BlockTypes.SPAWNER && (blockAndExtraData.length > 1 || allowWorkingDefault)) {
+            //FAWE end
             // Allow setting mob spawn type
             String mobName;
             if (blockAndExtraData.length > 1) {
@@ -563,7 +568,9 @@ private BaseBlock parseLogic(String input, ParserContext context) throws InputPa
                 mobName = EntityTypes.PIG.id();
             }
             return validate(context, new MobSpawnerBlock(state, mobName));
-        } else if ((blockType == BlockTypes.PLAYER_HEAD || blockType == BlockTypes.PLAYER_WALL_HEAD) && (blockAndExtraData.length > 1 || nbt != null)) {
+            //FAWE start - only handle if extra data is actually supplied or if the user has permission for nbt
+        } else if ((blockType == BlockTypes.PLAYER_HEAD || blockType == BlockTypes.PLAYER_WALL_HEAD) && (blockAndExtraData.length > 1 || allowWorkingDefault)) {
+            //FAWE end
             // allow setting type/player/rotation
             if (blockAndExtraData.length == 1) {
                 return validate(context, new SkullBlock(state));
@@ -600,7 +607,17 @@ private <T extends BlockStateHolder> T validate(ParserContext context, T holder)
             }
             CompoundTag nbt = holder.getNbtData();
             if (nbt != null) {
-                if (!actor.hasPermission("worldedit.anyblock.nbt")) {
+                if (actor.hasPermission("worldedit.anyblock.nbt")) {
+                    return holder;
+                }
+                if (nbt.equals(holder.getBlockType().getDefaultState().getNbtData())) {
+                    if (!actor.hasPermission("worldedit.anyblock.default-nbt")) {
+                        throw new DisallowedUsageException(Caption.of(
+                                "fawe.error.nbt.forbidden",
+                                TextComponent.of("worldedit.anyblock.default-nbt")
+                        ));
+                    }
+                } else {
                     throw new DisallowedUsageException(Caption.of(
                             "fawe.error.nbt.forbidden",
                             TextComponent.of("worldedit.anyblock.nbt")