Fixed tooltip bugging sometimes & giving a player the book on crafting

src/main/java/ellpeck/actuallyadditions/event/CraftEvent.java

@@ -15,12 +15,12 @@ import cpw.mods.fml.common.gameevent.PlayerEvent;
 import ellpeck.actuallyadditions.achievement.InitAchievements;
 import ellpeck.actuallyadditions.achievement.TheAchievements;
 import ellpeck.actuallyadditions.items.InitItems;
-import ellpeck.actuallyadditions.network.PacketGiveBook;
+import ellpeck.actuallyadditions.network.PacketCheckBook;
 import ellpeck.actuallyadditions.network.PacketHandler;
 import ellpeck.actuallyadditions.util.INameableItem;
-import ellpeck.actuallyadditions.util.PersistantVariables;
 import net.minecraft.block.Block;
 import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.entity.player.EntityPlayerMP;
 import net.minecraft.item.ItemStack;
 
 public class CraftEvent{
@@ -29,10 +29,9 @@ public class CraftEvent{
     public void onCraftedEvent(PlayerEvent.ItemCraftedEvent event){
         checkAchievements(event.crafting, event.player, InitAchievements.CRAFTING_ACH);
 
-        if(event.player.worldObj.isRemote && event.crafting.getItem() != InitItems.itemLexicon && (event.crafting.getItem() instanceof INameableItem || Block.getBlockFromItem(event.crafting.getItem()) instanceof INameableItem)){
-            if(!PersistantVariables.getBoolean("BookGotten")){
-                PacketHandler.theNetwork.sendToServer(new PacketGiveBook(event.player));
-                PersistantVariables.setBoolean("BookGotten", true);
+        if(!event.player.worldObj.isRemote && event.crafting.getItem() != InitItems.itemLexicon && (event.crafting.getItem() instanceof INameableItem || Block.getBlockFromItem(event.crafting.getItem()) instanceof INameableItem)){
+            if(event.player instanceof EntityPlayerMP){
+                PacketHandler.theNetwork.sendTo(new PacketCheckBook(event.player), (EntityPlayerMP)event.player);
             }
         }
     }

src/main/java/ellpeck/actuallyadditions/event/TooltipEvent.java

@@ -47,6 +47,7 @@ public class TooltipEvent{
         GuiScreen screen = Minecraft.getMinecraft().currentScreen;
         if(screen != null && !(screen instanceof GuiBooklet) && screen instanceof GuiContainer){
             GuiContainer gui = (GuiContainer)screen;
+            if(gui.inventorySlots != null && gui.inventorySlots.inventorySlots != null && !gui.inventorySlots.inventorySlots.isEmpty()){
                 for(Object o : gui.inventorySlots.inventorySlots){
                     if(o instanceof Slot){
                         Slot slot = (Slot)o;
@@ -85,6 +86,7 @@ public class TooltipEvent{
                     }
                 }
             }
+        }
 
         //Advanced Item Info
         if(event.itemStack.getItem() != null){

src/main/java/ellpeck/actuallyadditions/network/PacketCheckBook.java

@@ -0,0 +1,61 @@
+/*
+ * This file ("PacketCheckBook.java") is part of the Actually Additions Mod for Minecraft.
+ * It is created and owned by Ellpeck and distributed
+ * under the Actually Additions License to be found at
+ * http://github.com/Ellpeck/ActuallyAdditions/blob/master/README.md
+ * View the source code at https://github.com/Ellpeck/ActuallyAdditions
+ *
+ * © 2015 Ellpeck
+ */
+
+package ellpeck.actuallyadditions.network;
+
+import cpw.mods.fml.common.network.simpleimpl.IMessage;
+import cpw.mods.fml.common.network.simpleimpl.IMessageHandler;
+import cpw.mods.fml.common.network.simpleimpl.MessageContext;
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
+import ellpeck.actuallyadditions.util.PersistantVariables;
+import io.netty.buffer.ByteBuf;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.world.World;
+import net.minecraftforge.common.DimensionManager;
+
+public class PacketCheckBook implements IMessage{
+
+    @SuppressWarnings("unused")
+    public PacketCheckBook(){
+
+    }
+
+    private EntityPlayer player;
+
+    public PacketCheckBook(EntityPlayer player){
+        this.player = player;
+    }
+
+    @Override
+    public void fromBytes(ByteBuf buf){
+        World world = DimensionManager.getWorld(buf.readInt());
+        this.player = (EntityPlayer)world.getEntityByID(buf.readInt());
+    }
+
+    @Override
+    public void toBytes(ByteBuf buf){
+        buf.writeInt(this.player.worldObj.provider.dimensionId);
+        buf.writeInt(this.player.getEntityId());
+    }
+
+    public static class Handler implements IMessageHandler<PacketCheckBook, IMessage>{
+
+        @Override
+        @SideOnly(Side.CLIENT)
+        public IMessage onMessage(PacketCheckBook message, MessageContext ctx){
+            if(!PersistantVariables.getBoolean("BookGotten")){
+                PacketHandler.theNetwork.sendToServer(new PacketGiveBook(message.player));
+                PersistantVariables.setBoolean("BookGotten", true);
+            }
+            return null;
+        }
+    }
+}

src/main/java/ellpeck/actuallyadditions/network/PacketHandler.java

@@ -31,5 +31,6 @@ public class PacketHandler{
         theNetwork.registerMessage(PacketGuiNumber.Handler.class, PacketGuiNumber.class, 2, Side.SERVER);
         theNetwork.registerMessage(PacketGuiString.Handler.class, PacketGuiString.class, 3, Side.SERVER);
         theNetwork.registerMessage(PacketGiveBook.Handler.class, PacketGiveBook.class, 4, Side.SERVER);
+        theNetwork.registerMessage(PacketCheckBook.Handler.class, PacketCheckBook.class, 5, Side.CLIENT);
     }
 }