Include only existing states in blockdata meta (Fixes #1350)

This is only fixed in 1.20.6 or later. Setting only specified blockdata meta was fixed upstream in 1.21.3.

Author: PseudoKnight

src/main/java/com/laytonsmith/abstraction/MCItemMeta.java

@@ -122,6 +122,8 @@ public interface MCItemMeta extends AbstractionObject {
 
 	MCBlockData getBlockData(MCMaterial material);
 
+	Map<String, String> getExistingBlockData();
+
 	boolean hasBlockData();
 
 	void setBlockData(MCBlockData blockData);

src/main/java/com/laytonsmith/abstraction/bukkit/BukkitMCItemMeta.java

@@ -2,6 +2,8 @@
 
 import com.google.common.collect.LinkedHashMultimap;
 import com.google.common.collect.Multimap;
+import com.laytonsmith.PureUtilities.Common.ReflectionUtils;
+import com.laytonsmith.PureUtilities.Common.ReflectionUtils.ReflectionException;
 import com.laytonsmith.abstraction.AbstractionObject;
 import com.laytonsmith.abstraction.MCAttributeModifier;
 import com.laytonsmith.abstraction.MCItemMeta;
@@ -22,6 +24,10 @@
 
 import com.laytonsmith.abstraction.enums.bukkit.BukkitMCEnchantment;
 import com.laytonsmith.abstraction.enums.bukkit.BukkitMCItemFlag;
+import com.laytonsmith.core.MSLog;
+import com.laytonsmith.core.MSLog.Tags;
+import com.laytonsmith.core.constructs.Target;
+import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.attribute.Attribute;
 import org.bukkit.attribute.AttributeModifier;
@@ -195,6 +201,20 @@ public MCBlockData getBlockData(MCMaterial material) {
 		return new BukkitMCBlockData(((BlockDataMeta) this.im).getBlockData((Material) material.getHandle()));
 	}
 
+	@Override
+	public Map<String, String> getExistingBlockData() {
+		try {
+			Class clz = Class.forName(Bukkit.getServer().getClass().getPackage().getName() + ".inventory.CraftMetaItem");
+			return (Map<String, String>) ReflectionUtils.get(clz, this.im, "blockData");
+		} catch (ClassNotFoundException e) {
+			MSLog.GetLogger().e(Tags.GENERAL, "Failed to get CraftMetaItem class.", Target.UNKNOWN);
+			return null;
+		} catch (ReflectionException ex) {
+			MSLog.GetLogger().e(Tags.GENERAL, "Failed to get blockData from CraftMetaItem.", Target.UNKNOWN);
+			return null;
+		}
+	}
+
 	@Override
 	public boolean hasBlockData() {
 		return ((BlockDataMeta) this.im).hasBlockData();

src/main/java/com/laytonsmith/core/ObjectGenerator.java

@@ -105,7 +105,9 @@
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
+import java.util.Map.Entry;
 import java.util.Random;
 import java.util.Set;
 import java.util.UUID;
@@ -490,7 +492,17 @@ public Construct itemMeta(MCItemStack is, Target t) {
 			} else if(material.isBlock()) {
 				// Block items only
 				if(meta.hasBlockData()) {
-					ma.set("blockdata", blockData(meta.getBlockData(is.getType()), t), t);
+					if(Static.getServer().getMinecraftVersion().gte(MCVersion.MC1_20_6)) {
+						// return only existing states
+						Map<String, String> blockData = meta.getExistingBlockData();
+						if(blockData != null) {
+							ma.set("blockdata", blockData(is.getType(), blockData, t), t);
+						} else {
+							ma.set("blockdata", CNull.NULL, t);
+						}
+					} else {
+						ma.set("blockdata", blockData(meta.getBlockData(is.getType()), t), t);
+					}
 				} else {
 					ma.set("blockdata", CNull.NULL, t);
 				}
@@ -2510,9 +2522,18 @@ public CArray blockData(MCBlockData blockdata, Target t) {
 		return ca;
 	}
 
+	public CArray blockData(MCMaterial mat, Map<String, String> blockData, Target t) {
+		CArray ca = CArray.GetAssociativeArray(t);
+		ca.set("block", new CString(mat.getName().toLowerCase(Locale.ROOT), t), t);
+		for(Entry<String, String> entry : blockData.entrySet()) {
+			ca.set(entry.getKey(), blockState(entry.getValue()), t);
+		}
+		return ca;
+	}
+
 	private Construct blockState(String value) {
-		if(value.length() < 3 && Character.isDigit(value.charAt(0))) {
-			// integer states range from 0-25
+		int ch = value.charAt(0);
+		if(ch >= '0' && ch <= '9') {
 			try {
 				return new CInt(Long.parseLong(value), Target.UNKNOWN);
 			} catch (NumberFormatException e) {