DeployerRecipeSearchEvent

- added an event to add custom deploying recipes for addons(that partly need more data and therefore can't use the existing deploying recipe json format)
- made deploying recipe scanning cancelable by event
- added a safety check to tile entity behaviours to prevent concurrent modification exceptions when loading old worlds (0.2 time, dev 0.3)

src/main/java/com/simibubi/create/content/contraptions/components/deployer/DeployerRecipeSearchEvent.java

@@ -0,0 +1,59 @@
+package com.simibubi.create.content.contraptions.components.deployer;
+
+import java.util.Optional;
+import java.util.function.Supplier;
+
+import javax.annotation.Nullable;
+
+import com.simibubi.create.foundation.utility.recipe.TileEntityAwareRecipeWrapper;
+
+import net.minecraft.inventory.IInventory;
+import net.minecraft.item.crafting.IRecipe;
+import net.minecraftforge.eventbus.api.Event;
+
+public class DeployerRecipeSearchEvent extends Event {
+	private final DeployerTileEntity tileEntity;
+	private final TileEntityAwareRecipeWrapper inventory;
+	@Nullable
+	IRecipe<? extends IInventory> recipe = null;
+	private int maxPriority = 0;
+
+	public DeployerRecipeSearchEvent(DeployerTileEntity tileEntity, TileEntityAwareRecipeWrapper inventory) {
+		this.tileEntity = tileEntity;
+		this.inventory = inventory;
+	}
+
+	@Override
+	public boolean isCancelable() {
+		return true;
+	}
+
+	public DeployerTileEntity getTileEntity() {
+		return tileEntity;
+	}
+
+	public TileEntityAwareRecipeWrapper getInventory() {
+		return inventory;
+	}
+
+	// lazyness to not scan for recipes that aren't selected
+	public boolean shouldAddRecipeWithPriority(int priority) {
+		return !isCanceled() && priority > maxPriority;
+	}
+
+	@Nullable
+	public IRecipe<? extends IInventory> getRecipe() {
+		if (isCanceled())
+			return null;
+		return recipe;
+	}
+
+	public void addRecipe(Supplier<Optional<? extends IRecipe<? extends IInventory>>> recipeSupplier, int priority) {
+		if (!shouldAddRecipeWithPriority(priority))
+			return;
+		recipeSupplier.get().ifPresent(newRecipe -> {
+			this.recipe = newRecipe;
+			maxPriority = priority;
+		});
+	}
+}

src/main/java/com/simibubi/create/content/contraptions/components/deployer/DeployerTileEntity.java

@@ -4,7 +4,6 @@ import static com.simibubi.create.content.contraptions.base.DirectionalKineticBl
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Optional;
 
 import javax.annotation.Nullable;
 
@@ -26,8 +25,11 @@ import com.simibubi.create.foundation.utility.NBTHelper;
 import com.simibubi.create.foundation.utility.VecHelper;
 import com.simibubi.create.foundation.utility.animation.LerpedFloat;
 
+import com.simibubi.create.foundation.utility.recipe.TileEntityAwareRecipeWrapper;
+
 import net.minecraft.block.BlockState;
 import net.minecraft.entity.player.ServerPlayerEntity;
+import net.minecraft.inventory.IInventory;
 import net.minecraft.item.ItemStack;
 import net.minecraft.item.crafting.IRecipe;
 import net.minecraft.nbt.CompoundNBT;
@@ -46,6 +48,8 @@ import net.minecraft.util.math.RayTraceContext.FluidMode;
 import net.minecraft.util.math.vector.Vector3d;
 import net.minecraft.util.text.ITextComponent;
 import net.minecraft.world.server.ServerWorld;
+import net.minecraftforge.common.ForgeMod;
+import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.common.capabilities.Capability;
 import net.minecraftforge.common.util.Constants.NBT;
 import net.minecraftforge.common.util.LazyOptional;
@@ -437,29 +441,37 @@ public class DeployerTileEntity extends KineticTileEntity {
 		animatedOffset.setValue(offset);
 	}
 
-	RecipeWrapper recipeInv = new RecipeWrapper(new ItemStackHandler(2));
+	TileEntityAwareRecipeWrapper recipeInv = new TileEntityAwareRecipeWrapper(new ItemStackHandler(2), this);
 	SandPaperInv sandpaperInv = new SandPaperInv(ItemStack.EMPTY);
 
 	@Nullable
-	public IRecipe<?> getRecipe(ItemStack stack) {
-		if (player == null)
+	public IRecipe<? extends IInventory> getRecipe(ItemStack stack) {
+		// safety checks
+		if (player == null || level == null)
 			return null;
+
+		// sandpaper = op
 		ItemStack heldItemMainhand = player.getMainHandItem();
 		if (heldItemMainhand.getItem() instanceof SandPaperItem) {
 			sandpaperInv.setItem(0, stack);
 			return AllRecipeTypes.SANDPAPER_POLISHING.find(sandpaperInv, level)
 				.orElse(null);
 		}
+
+		// inventory
 		recipeInv.setItem(0, stack);
 		recipeInv.setItem(1, heldItemMainhand);
 
-		Optional<DeployerApplicationRecipe> assemblyRecipe = SequencedAssemblyRecipe.getRecipe(level, recipeInv,
-			AllRecipeTypes.DEPLOYING.getType(), DeployerApplicationRecipe.class);
-		if (assemblyRecipe.isPresent())
-			return assemblyRecipe.get();
+		// event nonsense
+		DeployerRecipeSearchEvent event = new DeployerRecipeSearchEvent(this, recipeInv);
 
-		return AllRecipeTypes.DEPLOYING.find(recipeInv, level)
-			.orElse(null);
+		// creates deployer recipes
+		event.addRecipe(() -> SequencedAssemblyRecipe.getRecipe(level, recipeInv,
+				AllRecipeTypes.DEPLOYING.getType(), DeployerApplicationRecipe.class), 100);
+		event.addRecipe(() -> AllRecipeTypes.DEPLOYING.find(recipeInv, level), 50);
+
+		// post the event, get result
+		MinecraftForge.EVENT_BUS.post(event);
+		return event.getRecipe();
 	}
-
 }

src/main/java/com/simibubi/create/foundation/tileEntity/TileEntityBehaviour.java

@@ -10,6 +10,8 @@ import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.IBlockReader;
 import net.minecraft.world.World;
 
+import java.util.ConcurrentModificationException;
+
 public abstract class TileEntityBehaviour {
 
 	public SmartTileEntity tileEntity;
@@ -85,7 +87,13 @@ public abstract class TileEntityBehaviour {
 	}
 
 	public static <T extends TileEntityBehaviour> T get(IBlockReader reader, BlockPos pos, BehaviourType<T> type) {
-		return get(reader.getBlockEntity(pos), type);
+		TileEntity te;
+		try {
+			te = reader.getBlockEntity(pos);
+		} catch (ConcurrentModificationException e) {
+			te = null;
+		}
+		return get(te, type);
 	}
 
 	public static <T extends TileEntityBehaviour> void destroy(IBlockReader reader, BlockPos pos,

src/main/java/com/simibubi/create/foundation/utility/recipe/TileEntityAwareRecipeWrapper.java

@@ -0,0 +1,21 @@
+package com.simibubi.create.foundation.utility.recipe;
+
+import net.minecraft.tileentity.TileEntity;
+import net.minecraftforge.items.IItemHandlerModifiable;
+import net.minecraftforge.items.wrapper.RecipeWrapper;
+
+import java.util.function.Supplier;
+
+public class TileEntityAwareRecipeWrapper extends RecipeWrapper implements Supplier<TileEntity> {
+	private final TileEntity tileEntity;
+
+	public TileEntityAwareRecipeWrapper(IItemHandlerModifiable inv, TileEntity tileEntity) {
+		super(inv);
+		this.tileEntity = tileEntity;
+	}
+
+	@Override
+	public TileEntity get() {
+		return tileEntity;
+	}
+}