fix command block #1212

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/providers/BlockEntityProvider.java

@@ -22,6 +22,7 @@ public class BlockEntityProvider implements Provider {
         handlers.put("minecraft:banner", new BannerHandler());
         handlers.put("minecraft:skull", new SkullHandler());
         handlers.put("minecraft:mob_spawner", new SpawnerHandler());
+        handlers.put("minecraft:command_block", new CommandBlockHandler());
     }
 
     /**

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/providers/blockentities/CommandBlockHandler.java

@@ -0,0 +1,19 @@
+package us.myles.ViaVersion.protocols.protocol1_13to1_12_2.providers.blockentities;
+
+import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
+import com.github.steveice10.opennbt.tag.builtin.StringTag;
+import com.github.steveice10.opennbt.tag.builtin.Tag;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ChatRewriter;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.providers.BlockEntityProvider;
+
+public class CommandBlockHandler implements BlockEntityProvider.BlockEntityHandler {
+    @Override
+    public int transform(UserConnection user, CompoundTag tag) {
+        Tag name = tag.get("CustomName");
+        if (name instanceof StringTag) {
+            ((StringTag) name).setValue(ChatRewriter.legacyTextToJson(((StringTag) name).getValue()));
+        }
+        return -1;
+    }
+}