io.github.sefiraat.slimetinker.utils.EntityUtils Maven / Gradle / Ivy

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package io.github.sefiraat.slimetinker.utils;

import io.github.thebusybiscuit.slimefun4.implementation.Slimefun;
import io.github.thebusybiscuit.slimefun4.libraries.dough.data.persistent.PersistentDataAPI;
import org.bukkit.Location;
import org.bukkit.NamespacedKey;
import org.bukkit.Particle;
import org.bukkit.World;
import org.bukkit.block.Block;
import org.bukkit.entity.Animals;
import org.bukkit.entity.Entity;
import org.bukkit.entity.LivingEntity;
import org.bukkit.entity.Player;
import org.bukkit.potion.PotionEffectType;
import org.bukkit.util.Vector;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.List;
import java.util.Map;

public final class EntityUtils {

    private EntityUtils() {
        throw new IllegalStateException("Utility class");
    }

    private static final NamespacedKey IGNORE_DAMAGE_KEY = new NamespacedKey(Slimefun.instance(), "ignore_damage");

    public static void push(@Nonnull LivingEntity pushed, @Nonnull Location loc, double force) {
        Vector v = pushed.getLocation().toVector().subtract(loc.toVector()).normalize().multiply(force);
        v.add(new Vector(0, force + 1, 0));
        pushed.setVelocity(v);
    }

    /**
     * Increases the requested potion effect by one, adding it if it doesn't exist
     *
     * @param potionEffectType The type of effect
     * @param potionEffects    The map of effects to update
     */
    public static void increaseEffect(PotionEffectType potionEffectType, Map potionEffects) {
        increaseEffect(potionEffectType, potionEffects, 1);
    }

    /**
     * Increases the requested potion effect by the amount, adding it if it doesn't exist
     *
     * @param potionEffectType The type of effect
     * @param potionEffects    The map of effects to update
     * @param amount           The amount to increment by
     */
    public static void increaseEffect(PotionEffectType potionEffectType, @Nonnull Map potionEffects, int amount) {
        if (potionEffects.containsKey(potionEffectType)) {
            potionEffects.put(potionEffectType, potionEffects.get(potionEffectType) + amount);
        } else {
            potionEffects.put(potionEffectType, amount);
        }
    }

    /**
     * SFW's Training dummy allows damage and exp gain for free, no thanks!
     *
     * @return True is target is a Training Dummy
     */
    public static boolean isTrainingDummy(@Nonnull Entity e) {
        return e.getCustomName() != null && e.getCustomName().equals("Dummy");
    }

    /**
     * Checks for a PDC entry to ignore damage for player damage events fired unnaturally (Crysta's plates)
     *
     * @return True if damage SHOULD be ignored
     */
    public static boolean shouldIgnoreDamage(Entity e) {
        return PersistentDataAPI.getBoolean(e, IGNORE_DAMAGE_KEY);
    }

    public static double getFacing(@Nonnull Player p, @Nonnull Entity e) {
        Vector pd = p.getLocation().getDirection();
        Vector ed = e.getLocation().getDirection();
        double x = (pd.getX() * ed.getZ()) - (pd.getZ() * ed.getX());
        double z = (pd.getX() * ed.getX()) + (pd.getZ() * ed.getZ());
        double a = Math.atan2(x, z);
        return (a * 180) / Math.PI;
    }

    public static boolean isFacingAway(Player p, Entity e) {
        return isFacingAway(p, e, null);
    }

    public static boolean isFacingAway(Player p, Entity e, @Nullable Integer tolerance) {
        double d = getFacing(p, e);
        Integer val = tolerance == null ? Integer.valueOf(30) : tolerance;
        return d <= val && d >= -val;
    }

    public static void makeBreed(@Nonnull Animals a) {
        if (a.isAdult() && !a.isLoveMode()) {
            a.setBreed(true);
            a.setLoveModeTicks(400);
            a.getWorld().spawnParticle(Particle.HEART, a.getLocation(), 4, 0.5, 0.5, 0.5);
        }
    }

    @Nonnull
    public static  List getNearbyEntitiesByType(@Nonnull Class clazz, @Nonnull Entity e, double x, double y, double z) {
        return getNearbyEntitiesByType(clazz, e.getLocation(), x, y, z);
    }

    @Nonnull
    public static  List getNearbyEntitiesByType(@Nonnull Class clazz, @Nonnull Block b, double x, double y, double z) {
        return getNearbyEntitiesByType(clazz, b.getLocation(), x, y, z);
    }

    @Nonnull
    public static  List getNearbyEntitiesByType(@Nonnull Class clazz, @Nonnull Location l, double x, double y, double z) {
        World world = l.getWorld();
        return ((List) world.getNearbyEntities(l, x, y, z, clazz::isInstance));
    }

    @Nullable
    public static Entity getEntityLookedAtByEntity(LivingEntity lookingEntity) {
        return getEntityLookedAtByEntityByType(lookingEntity, Entity.class);
    }

    @Nullable
    public static  T getEntityLookedAtByEntityByType(@Nonnull LivingEntity lookingEntity, Class entityType) {

        Vector fromLookDir = lookingEntity.getEyeLocation().getDirection();
        Vector fromEyeLoc = lookingEntity.getEyeLocation().toVector();

        List entityList = EntityUtils.getNearbyEntitiesByType(entityType, lookingEntity, 15, 15, 15);
        for (Entity e : entityList) {
            if (lookingEntity.hasLineOfSight(e)) {
                Vector entityLoc = e.getLocation().toVector();
                Vector pEntVec = entityLoc.subtract(fromEyeLoc);
                float angle = fromLookDir.angle(pEntVec);
                if (angle < 0.2f) {
                    return (T) e;
                }
            }
        }
        return null;
    }
}