ActuallyAdditions/src/main/java/ellpeck/actuallyadditions/inventory/ContainerGrinder.java

package ellpeck.actuallyadditions.inventory;

import ellpeck.actuallyadditions.inventory.slot.SlotOutput;
import ellpeck.actuallyadditions.recipe.CrusherRecipeManualRegistry;
import ellpeck.actuallyadditions.tile.TileEntityBase;
import ellpeck.actuallyadditions.tile.TileEntityGrinder;
import invtweaks.api.container.InventoryContainer;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;

@InventoryContainer
public class ContainerGrinder extends Container{

    public TileEntityGrinder tileGrinder;
    private boolean isDouble;

    public ContainerGrinder(InventoryPlayer inventory, TileEntityBase tile, boolean isDouble){
        this.tileGrinder = (TileEntityGrinder)tile;
        this.isDouble = isDouble;

        this.addSlotToContainer(new Slot(this.tileGrinder, TileEntityGrinder.SLOT_INPUT_1, this.isDouble ? 51 : 80, 21));
        this.addSlotToContainer(new SlotOutput(this.tileGrinder, TileEntityGrinder.SLOT_OUTPUT_1_1, this.isDouble ? 37 : 66, 69));
        this.addSlotToContainer(new SlotOutput(this.tileGrinder, TileEntityGrinder.SLOT_OUTPUT_1_2, this.isDouble ? 64 : 92, 69));
        if(this.isDouble){
            this.addSlotToContainer(new Slot(this.tileGrinder, TileEntityGrinder.SLOT_INPUT_2, 109, 21));
            this.addSlotToContainer(new SlotOutput(this.tileGrinder, TileEntityGrinder.SLOT_OUTPUT_2_1, 96, 69));
            this.addSlotToContainer(new SlotOutput(this.tileGrinder, TileEntityGrinder.SLOT_OUTPUT_2_2, 121, 69));
        }

        for (int i = 0; i < 3; i++){
            for (int j = 0; j < 9; j++){
                this.addSlotToContainer(new Slot(inventory, j + i * 9 + 9, 8 + j * 18, 97 + i * 18));
            }
        }
        for (int i = 0; i < 9; i++){
            this.addSlotToContainer(new Slot(inventory, i, 8 + i * 18, 155));
        }
    }

    @Override
    public boolean canInteractWith(EntityPlayer player){
        return this.tileGrinder.isUseableByPlayer(player);
    }

    @Override
    public ItemStack transferStackInSlot(EntityPlayer player, int slot){
        final int inventoryStart = this.isDouble ? 6 : 3;
        final int inventoryEnd = inventoryStart+26;
        final int hotbarStart = inventoryEnd+1;
        final int hotbarEnd = hotbarStart+8;

        Slot theSlot = (Slot)this.inventorySlots.get(slot);

        if (theSlot != null && theSlot.getHasStack()){
            ItemStack newStack = theSlot.getStack();
            ItemStack currentStack = newStack.copy();

            //Slots in Inventory to shift from
            if(slot == TileEntityGrinder.SLOT_OUTPUT_1_1 || slot == TileEntityGrinder.SLOT_OUTPUT_1_2 || (this.isDouble && (slot == TileEntityGrinder.SLOT_OUTPUT_2_1 || slot == TileEntityGrinder.SLOT_OUTPUT_2_2))){
                if(!this.mergeItemStack(newStack, inventoryStart, hotbarEnd+1, true)) return null;
                theSlot.onSlotChange(newStack, currentStack);
            }
            //Other Slots in Inventory excluded
            else if(slot >= inventoryStart){
                //Shift from Inventory
                if(CrusherRecipeManualRegistry.getOutput(newStack, false) != null){
                    if(!this.mergeItemStack(newStack, TileEntityGrinder.SLOT_INPUT_1, TileEntityGrinder.SLOT_INPUT_1+1, false)){
                        if(this.isDouble){
                            if(!this.mergeItemStack(newStack, TileEntityGrinder.SLOT_INPUT_2, TileEntityGrinder.SLOT_INPUT_2+1, false)) return null;
                        }
                        else return null;
                    }
                }
                //

                else if(slot >= inventoryStart && slot <= inventoryEnd){
                    if(!this.mergeItemStack(newStack, hotbarStart, hotbarEnd+1, false)) return null;
                }
                else if(slot >= inventoryEnd+1 && slot < hotbarEnd+1 && !this.mergeItemStack(newStack, inventoryStart, inventoryEnd+1, false)) return null;
            }
            else if(!this.mergeItemStack(newStack, inventoryStart, hotbarEnd+1, false)) return null;

            if (newStack.stackSize == 0) theSlot.putStack(null);
            else theSlot.onSlotChanged();

            if (newStack.stackSize == currentStack.stackSize) return null;
            theSlot.onPickupFromSlot(player, newStack);

            return currentStack;
        }
        return null;
    }
}