ActuallyAdditions/src/main/java/de/ellpeck/actuallyadditions/mod/tile/TileEntityFeeder.java

/*
 * This file ("TileEntityFeeder.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://ellpeck.de/actaddlicense
 * View the source code at https://github.com/Ellpeck/ActuallyAdditions
 *
 * © 2015-2017 Ellpeck
 */

package de.ellpeck.actuallyadditions.mod.tile;

import java.util.List;
import java.util.Optional;

import net.minecraft.entity.passive.EntityAnimal;
import net.minecraft.entity.passive.EntityHorse;
import net.minecraft.init.Items;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.EnumParticleTypes;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.util.math.MathHelper;

public class TileEntityFeeder extends TileEntityInventoryBase{

    public static final int THRESHOLD = 30;
    private static final int TIME = 100;
    public int currentTimer;
    public int currentAnimalAmount;
    private int lastAnimalAmount;
    private int lastTimer;

    public TileEntityFeeder(){
        super(1, "feeder");
    }

    public int getCurrentTimerToScale(int i){
        return this.currentTimer*i/TIME;
    }

    @Override
    public void writeSyncableNBT(NBTTagCompound compound, NBTType type){
        super.writeSyncableNBT(compound, type);
        compound.setInteger("Timer", this.currentTimer);
        if(type == NBTType.SYNC){
            compound.setInteger("Animals", this.currentAnimalAmount);
        }
    }

    @Override
    public void readSyncableNBT(NBTTagCompound compound, NBTType type){
        super.readSyncableNBT(compound, type);
        this.currentTimer = compound.getInteger("Timer");
        if(type == NBTType.SYNC){
            this.currentAnimalAmount = compound.getInteger("Animals");
        }
    }

    @Override
    public void updateEntity(){
        super.updateEntity();
        currentTimer = MathHelper.clamp(++currentTimer, 0, 100);
        if(world.isRemote) return;
        int range = 5;
        ItemStack stack = this.slots.getStackInSlot(0);
        if(!stack.isEmpty() && this.currentTimer >= TIME) {
        	List<EntityAnimal> animals = this.world.getEntitiesWithinAABB(EntityAnimal.class, new AxisAlignedBB(this.pos.getX()-range, this.pos.getY()-range, this.pos.getZ()-range, this.pos.getX()+range, this.pos.getY()+range, this.pos.getZ()+range));
        	this.currentAnimalAmount = animals.size();
            if(currentAnimalAmount >= 2 && currentAnimalAmount < THRESHOLD){
            	Optional<EntityAnimal> opt = animals.stream().filter((e) -> canBeFed(stack, e)).findAny();
            	if(opt.isPresent()) {
            		feedAnimal(opt.get());
            		stack.shrink(1);
            		this.currentTimer = 0;
            		markDirty();
            	}
            }
        }
        if((this.lastAnimalAmount != this.currentAnimalAmount || this.lastTimer != this.currentTimer) && this.sendUpdateWithInterval()){
        	this.lastAnimalAmount = this.currentAnimalAmount;
        	this.lastTimer = this.currentTimer;
        }
    }

    @Override
    public boolean isItemValidForSlot(int i, ItemStack stack){
        return true;
    }

    @Override
    public boolean canExtractItem(int slot, ItemStack stack){
        return false;
    }
    
    private static void feedAnimal(EntityAnimal animal){
        animal.setInLove(null);
        for(int i = 0; i < 7; i++){
            double d = animal.world.rand.nextGaussian()*0.02D;
            double d1 = animal.world.rand.nextGaussian()*0.02D;
            double d2 = animal.world.rand.nextGaussian()*0.02D;
            animal.world.spawnParticle(EnumParticleTypes.HEART, (animal.posX+(double)(animal.world.rand.nextFloat()*animal.width*2.0F))-animal.width, animal.posY+0.5D+(double)(animal.world.rand.nextFloat()*animal.height), (animal.posZ+(double)(animal.world.rand.nextFloat()*animal.width*2.0F))-animal.width, d, d1, d2);
        }
    }
    
    private static boolean canBeFed(ItemStack stack, EntityAnimal animal){
    	if(animal instanceof EntityHorse && ((EntityHorse) animal).isTame()){
    		Item item = stack.getItem();
    		return (animal.getGrowingAge() == 0 && !animal.isInLove()) && (item == Items.GOLDEN_APPLE || item == Items.GOLDEN_CARROT);
        }
        return animal.getGrowingAge() == 0 && !animal.isInLove() && animal.isBreedingItem(stack);
    }
}