minecraft-kajetans-core-mod/src/main/java/me/kcm/Hooks.java

package me.kcm;

import java.util.Collections;
import java.util.List;
import java.util.function.Consumer;
import javax.annotation.Nullable;
import net.minecraft.block.BlockState;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.inventory.CraftResultInventory;
import net.minecraft.inventory.CraftingInventory;
import net.minecraft.item.ItemStack;
import net.minecraft.server.dedicated.DedicatedPlayerList;
import net.minecraft.server.dedicated.DedicatedServer;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;
import net.minecraft.world.server.ServerWorld;

public class Hooks {
    private static Consumer<DedicatedServer> playerListFunction = null;
    private static BlockHarvest blockHarvest = (state, w, pos, tileEnt, ent, stack) -> Collections.EMPTY_LIST;
    private static Craft craft = (id, w, p, cInv, slot) -> {};

    public static void setPlayerListFunction(Consumer<DedicatedServer> c) {
        playerListFunction = c;
    }

    public static void setPlayerList(DedicatedServer server) {
        if(playerListFunction != null) {
            playerListFunction.accept(server);
        } else {
            try {
                server.setPlayerList(new DedicatedPlayerList(server));
            } catch(Exception ex) {
                // this is stupid and should not be needed
                ex.printStackTrace();
            }
        }
    }

    public static void setBlockHarvest(BlockHarvest c) {
        blockHarvest = c;
    }
    
    public static void setCraft(Craft c) {
        craft = c;
    }

    public static List<ItemStack> getDropsA(BlockState state, ServerWorld w, BlockPos pos, @Nullable TileEntity tileEnt) {
        return blockHarvest.onBlockHarvest(state, w, pos, tileEnt, null, null);
    }

    public static List<ItemStack> getDropsB(BlockState state, ServerWorld w, BlockPos pos, @Nullable TileEntity tileEnt, @Nullable Entity ent, ItemStack stack) {
        return blockHarvest.onBlockHarvest(state, w, pos, tileEnt, ent, stack);
    }
    
    public static void onCraft(int id, World w, PlayerEntity p, CraftingInventory cInv, CraftResultInventory slot) {
        craft.onCraft(id, w, p, cInv, slot);
    }
}