Fire a SmelteryCastEvent when a castingTable tries to cast something.…

… Allows to deny the casting.

src/main/java/tconstruct/library/event/SmelteryCastEvent.java

@@ -0,0 +1,20 @@
+package tconstruct.library.event;
+
+import cpw.mods.fml.common.eventhandler.Event;
+import net.minecraftforge.fluids.FluidStack;
+import tconstruct.library.crafting.CastingRecipe;
+
+/**
+ * Fires when somebody tries to pour a liquid into a metal cast.
+ *
+ * Set result to DENY to prevent casting.
+ */
+public class SmelteryCastEvent extends Event {
+    public final CastingRecipe recipe;
+    public final FluidStack fluid;
+
+    public SmelteryCastEvent(CastingRecipe recipe, FluidStack fluid) {
+        this.recipe = recipe;
+        this.fluid = fluid;
+    }
+}

src/main/java/tconstruct/smeltery/logic/CastingTableLogic.java

@@ -1,5 +1,6 @@
 package tconstruct.smeltery.logic;
 
+import cpw.mods.fml.common.eventhandler.Event;
 import mantle.blocks.abstracts.InventoryLogic;
 import net.minecraft.entity.player.InventoryPlayer;
 import net.minecraft.inventory.Container;
@@ -10,6 +11,7 @@
 import net.minecraft.network.Packet;
 import net.minecraft.network.play.server.S35PacketUpdateTileEntity;
 import net.minecraft.world.World;
+import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.common.util.ForgeDirection;
 import net.minecraftforge.fluids.Fluid;
 import net.minecraftforge.fluids.FluidEvent;
@@ -19,6 +21,7 @@
 import net.minecraftforge.fluids.IFluidTank;
 import tconstruct.TConstruct;
 import tconstruct.library.crafting.CastingRecipe;
+import tconstruct.library.event.SmelteryCastEvent;
 import tconstruct.library.util.IPattern;
 
 public class CastingTableLogic extends InventoryLogic implements IFluidTank, IFluidHandler, ISidedInventory
@@ -120,6 +123,13 @@ public int fill (FluidStack resource, boolean doFill)
             CastingRecipe recipe = TConstruct.tableCasting.getCastingRecipe(resource, inventory[0]);
             if (recipe == null)
                 return 0;
+
+            SmelteryCastEvent event = new SmelteryCastEvent(recipe, resource);
+            MinecraftForge.EVENT_BUS.post(event);
+
+            if(event.getResult() == Event.Result.DENY)
+                return 0;
+
             this.capacity = updateCapacity(recipe.castingMetal.amount);
 
             if (inventory[1] == null)