Mapping fixes

bukkit/src/main/java/com/viaversion/viabackwards/BukkitPlugin.java

@@ -33,8 +33,6 @@ import org.bukkit.plugin.java.JavaPlugin;
 public class BukkitPlugin extends JavaPlugin implements ViaBackwardsPlatform {
 
     public BukkitPlugin() {
-        // This is the only place we can enable this before ViaVersion is loaded and registers protocols
-        // MappingDataLoader.enableMappingsCache();
     }
 
     @Override

bungee/src/main/java/com/viaversion/viabackwards/BungeePlugin.java

@@ -27,7 +27,6 @@ public class BungeePlugin extends Plugin implements ViaBackwardsPlatform {
 
     @Override
     public void onLoad() {
-        // MappingDataLoader.enableMappingsCache();
         Via.getManager().addEnableListener(() -> this.init(getDataFolder()));
     }
 

common/src/main/java/com/viaversion/viabackwards/api/data/BackwardsMappings.java

@@ -61,6 +61,14 @@ public class BackwardsMappings extends MappingDataBase {
 
     @Override
     protected void loadExtras(final CompoundTag data) {
+        if (vvProtocolClass != null) {
+            // Reuse item mappings
+            //TODO rest
+            final MappingData mappingData = Via.getManager().getProtocolManager().getProtocol(vvProtocolClass).getMappingData();
+            final BiMappings vvItemMappings = mappingData.getItemMappings();
+            this.itemMappings = vvItemMappings != null ? vvItemMappings.inverse() : null;
+        }
+
         final CompoundTag itemNames = data.get("itemnames");
         if (itemNames != null) {
             backwardsItemMappings = new Int2ObjectOpenHashMap<>(itemNames.size());
@@ -120,10 +128,11 @@ public class BackwardsMappings extends MappingDataBase {
         return mappings != null ? mappings.createInverse() : null;
     }
 
-    /*@Override
+    @Override
     protected boolean shouldLoad(final String key) {
-        return !TO_REUSE.contains(key);
+        return !key.equals("items");
-    }/*/
+        //return !TO_REUSE.contains(key); //TODO
+    }
 
     /**
      * @see #getMappedItem(int) for custom backwards mappings

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/data/BackwardsMappings.java

@@ -157,6 +157,6 @@ public class BackwardsMappings extends com.viaversion.viabackwards.api.data.Back
 
     @Override
     protected boolean shouldLoad(final String key) {
-        return super.shouldLoad(key) && !key.equals("blocks");
+        return !key.equals("blocks");
     }
 }

sponge/src/main/java/com/viaversion/viabackwards/SpongePlugin.java

@@ -47,7 +47,6 @@ public class SpongePlugin implements ViaBackwardsPlatform {
 
     @Listener
     public void constructPlugin(ConstructPluginEvent event) {
-        // MappingDataLoader.enableMappingsCache();
         Via.getManager().addEnableListener(() -> this.init(getDataFolder()));
     }
 

velocity/src/main/java/com/viaversion/viabackwards/VelocityPlugin.java

@@ -52,7 +52,6 @@ public class VelocityPlugin implements ViaBackwardsPlatform {
     @Subscribe(order = PostOrder.LATE)
     public void onProxyStart(ProxyInitializeEvent event) {
         this.logger = new LoggerWrapper(loggerSlf4j);
-        // MappingDataLoader.enableMappingsCache();
         Via.getManager().addEnableListener(() -> this.init(getDataFolder()));
     }