fix: empty string caused channel crash && check if custom name exist before getting

src/main/java/com/glodblock/github/network/CPacketRenamer.java

@@ -2,6 +2,8 @@ package com.glodblock.github.network;
 
 import static com.glodblock.github.common.item.ItemWirelessUltraTerminal.getGuis;
 
+import java.util.Objects;
+
 import net.minecraft.entity.player.EntityPlayerMP;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraftforge.common.DimensionManager;
@@ -97,15 +99,23 @@ public class CPacketRenamer implements IMessage {
 
     public static class Handler implements IMessageHandler<CPacketRenamer, IMessage> {
 
+        private String _getName(ICustomNameObject obj) {
+            // "‎" is a zero size character, sent because simple channel does not support empty string
+            return obj.hasCustomName() ? obj.getCustomName() : "\u200E";
+        }
+
         private String getName(TileEntity tile, ForgeDirection side) {
             if (tile instanceof TileCableBus) {
-                return ((ICustomNameObject) ((TileCableBus) tile).getPart(side)).getCustomName();
+                return _getName((ICustomNameObject) ((TileCableBus) tile).getPart(side));
             } else {
-                return ((ICustomNameObject) tile).getCustomName();
+                return _getName((ICustomNameObject) tile);
             }
         }
 
         private void setName(TileEntity tile, ForgeDirection side, String text) {
+            if (Objects.equals(text, "\u200E")) {
+                text = "";
+            }
             if (tile instanceof TileCableBus) {
                 ((ICustomNameObject) ((TileCableBus) tile).getPart(side)).setCustomName(text);
             } else {

src/main/java/com/glodblock/github/network/SPacketStringUpdate.java

@@ -1,5 +1,7 @@
 package com.glodblock.github.network;
 
+import java.util.Objects;
+
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.GuiScreen;
 
@@ -53,7 +55,7 @@ public class SPacketStringUpdate implements IMessage {
         public IMessage onMessage(SPacketStringUpdate message, MessageContext ctx) {
             final GuiScreen gs = Minecraft.getMinecraft().currentScreen;
             if (gs instanceof GuiRenamer) {
-                ((GuiRenamer) gs).postUpdate(message.text);
+                ((GuiRenamer) gs).postUpdate(Objects.equals(message.text, "\u200E") ? "" : message.text);
             }
             return null;
         }