Fix to allow mod to work on server

src/main/java/com/seodisparate/TurnBasedMinecraft/client/BattleGui.java

@@ -131,6 +131,8 @@ public class BattleGui extends GuiScreen
             TurnBasedMinecraftMod.currentBattle.setState(Battle.State.DECISION);
         }
         timeRemaining.set((int)TurnBasedMinecraftMod.BattleDecisionTime.getSeconds());
+        elapsedTime = 0;
+        lastInstant = System.nanoTime();
         setState(MenuState.MAIN_MENU);
     }
     

src/main/java/com/seodisparate/TurnBasedMinecraft/client/ClientProxy.java

@@ -0,0 +1,52 @@
+package com.seodisparate.TurnBasedMinecraft.client;
+
+import com.seodisparate.TurnBasedMinecraft.common.CommonProxy;
+
+import net.minecraft.client.Minecraft;
+
+public class ClientProxy extends CommonProxy
+{
+    private BattleGui battleGui;
+    
+    public ClientProxy()
+    {
+        super();
+        battleGui = new BattleGui();
+    }
+    
+    @Override
+    public void setBattleGuiTime(int timeRemaining)
+    {
+        battleGui.timeRemaining.set(timeRemaining);
+    }
+
+    @Override
+    public void setBattleGuiBattleChanged()
+    {
+        battleGui.battleChanged();
+    }
+
+    @Override
+    public void setBattleGuiAsGui()
+    {
+        Minecraft.getMinecraft().addScheduledTask(() -> {
+            if(Minecraft.getMinecraft().currentScreen != battleGui)
+            {
+                battleGui.turnEnd();
+                Minecraft.getMinecraft().displayGuiScreen(battleGui);
+            }
+        });
+    }
+
+    @Override
+    public void battleGuiTurnBegin()
+    {
+        battleGui.turnBegin();
+    }
+
+    @Override
+    public void battleGuiTurnEnd()
+    {
+        battleGui.turnEnd();
+    }
+}

src/main/java/com/seodisparate/TurnBasedMinecraft/common/CommonProxy.java

@@ -0,0 +1,14 @@
+package com.seodisparate.TurnBasedMinecraft.common;
+
+public class CommonProxy
+{
+    public void setBattleGuiTime(int timeRemaining) {}
+    
+    public void setBattleGuiBattleChanged() {}
+    
+    public void setBattleGuiAsGui() {}
+    
+    public void battleGuiTurnBegin() {}
+    
+    public void battleGuiTurnEnd() {}
+}

src/main/java/com/seodisparate/TurnBasedMinecraft/common/EntityInfo.java

@@ -1,7 +1,6 @@
 package com.seodisparate.TurnBasedMinecraft.common;
 
 import java.util.ArrayList;
-import java.util.Comparator;
 import java.util.List;
 
 public class EntityInfo

src/main/java/com/seodisparate/TurnBasedMinecraft/common/TurnBasedMinecraftMod.java

@@ -4,7 +4,6 @@ import java.time.Duration;
 
 import org.apache.logging.log4j.Logger;
 
-import com.seodisparate.TurnBasedMinecraft.client.BattleGui;
 import com.seodisparate.TurnBasedMinecraft.common.networking.PacketBattleDecision;
 import com.seodisparate.TurnBasedMinecraft.common.networking.PacketBattleInfo;
 import com.seodisparate.TurnBasedMinecraft.common.networking.PacketBattleMessage;
@@ -13,13 +12,12 @@ import com.seodisparate.TurnBasedMinecraft.common.networking.PacketHandler;
 
 import net.minecraft.entity.Entity;
 import net.minecraftforge.common.MinecraftForge;
-import net.minecraftforge.event.entity.living.LivingAttackEvent;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.common.Mod.EventHandler;
+import net.minecraftforge.fml.common.SidedProxy;
 import net.minecraftforge.fml.common.event.FMLInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
 import net.minecraftforge.fml.relauncher.Side;
 
 @Mod(modid = TurnBasedMinecraftMod.MODID, name = TurnBasedMinecraftMod.NAME, version = TurnBasedMinecraftMod.VERSION)
@@ -44,7 +42,9 @@ public class TurnBasedMinecraftMod
     protected static Config config;
     
     public static Battle currentBattle = null;
-    public static BattleGui currentBattleGui = null;
+    
+    @SidedProxy(modId=MODID, serverSide="com.seodisparate.TurnBasedMinecraft.common.CommonProxy", clientSide="com.seodisparate.TurnBasedMinecraft.client.ClientProxy")
+    public static CommonProxy commonProxy;
 
     @EventHandler
     public void preInit(FMLPreInitializationEvent event)

src/main/java/com/seodisparate/TurnBasedMinecraft/common/networking/PacketBattleInfo.java

@@ -81,11 +81,8 @@ public class PacketBattleInfo implements IMessage
             {
                 TurnBasedMinecraftMod.currentBattle.addCombatantToSideB(Minecraft.getMinecraft().world.getEntityByID(id));
             }
-            if(TurnBasedMinecraftMod.currentBattleGui != null)
+            TurnBasedMinecraftMod.commonProxy.setBattleGuiTime((int)(message.decisionNanos / 1000000000));
-            {
+            TurnBasedMinecraftMod.commonProxy.setBattleGuiBattleChanged();
-                TurnBasedMinecraftMod.currentBattleGui.timeRemaining.set((int)(message.decisionNanos / 1000000000));
-                TurnBasedMinecraftMod.currentBattleGui.battleChanged();
-            }
             return null;
         }
     }

src/main/java/com/seodisparate/TurnBasedMinecraft/common/networking/PacketBattleMessage.java

@@ -3,14 +3,12 @@ package com.seodisparate.TurnBasedMinecraft.common.networking;
 import java.util.HashMap;
 import java.util.Map;
 
-import com.seodisparate.TurnBasedMinecraft.client.BattleGui;
 import com.seodisparate.TurnBasedMinecraft.common.Battle;
 import com.seodisparate.TurnBasedMinecraft.common.TurnBasedMinecraftMod;
 
 import io.netty.buffer.ByteBuf;
 import net.minecraft.client.Minecraft;
 import net.minecraft.entity.Entity;
-import net.minecraft.entity.EntityLiving;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.scoreboard.ScorePlayerTeam;
 import net.minecraft.util.text.TextComponentString;
@@ -232,13 +230,7 @@ public class PacketBattleMessage implements IMessage
                 {
                     TurnBasedMinecraftMod.currentBattle = new Battle(message.amount, null, null, false);
                 }
-                if(TurnBasedMinecraftMod.currentBattleGui == null)
+                TurnBasedMinecraftMod.commonProxy.setBattleGuiAsGui();
-                {
-                    Minecraft.getMinecraft().addScheduledTask(() -> {
-                        TurnBasedMinecraftMod.currentBattleGui = new BattleGui();
-                        Minecraft.getMinecraft().displayGuiScreen(TurnBasedMinecraftMod.currentBattleGui);
-                    });
-                }
                 break;
             case FLEE:
                 if(message.amount != 0)
@@ -261,7 +253,6 @@ public class PacketBattleMessage implements IMessage
                         "Battle has ended!"));
                 TurnBasedMinecraftMod.currentBattle = null;
                 Minecraft.getMinecraft().addScheduledTask(() -> {
-                    TurnBasedMinecraftMod.currentBattleGui = null;
                     Minecraft.getMinecraft().setIngameFocus();
                 });
                 break;
@@ -321,10 +312,7 @@ public class PacketBattleMessage implements IMessage
             case TURN_BEGIN:
                 Minecraft.getMinecraft().ingameGUI.getChatGUI().printChatMessage(new TextComponentString(
                         "The turn begins!"));
-                if(TurnBasedMinecraftMod.currentBattleGui != null)
+                TurnBasedMinecraftMod.commonProxy.battleGuiTurnBegin();
-                {
-                    TurnBasedMinecraftMod.currentBattleGui.turnBegin();
-                }
                 break;
             case TURN_END:
                 if(TurnBasedMinecraftMod.currentBattle != null)
@@ -332,10 +320,7 @@ public class PacketBattleMessage implements IMessage
                     Minecraft.getMinecraft().ingameGUI.getChatGUI().printChatMessage(new TextComponentString(
                         "The turn ended!"));
                 }
-                if(TurnBasedMinecraftMod.currentBattleGui != null)
+                TurnBasedMinecraftMod.commonProxy.battleGuiTurnEnd();
-                {
-                    TurnBasedMinecraftMod.currentBattleGui.turnEnd();
-                }
                 break;
             case SWITCHED_ITEM:
                 if(message.amount != 0)