Mineplex2018-withcommit/Plugins/Mineplex.Game.Clans/src/mineplex/game/clans/items/legendaries/MagneticMaul.java

package mineplex.game.clans.items.legendaries;

import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.entity.LivingEntity;
import org.bukkit.entity.Player;
import org.bukkit.util.Vector;

import mineplex.core.common.util.UtilAction;
import mineplex.core.common.util.UtilAlg;
import mineplex.minecraft.game.core.damage.CustomDamageEvent;

public class MagneticMaul extends LegendaryItem
{
	public static final double PULL_RANGE = 10d;
	
	public MagneticMaul()
	{
		super("Magnetic Maul", "Pull enemies closer with special abilities!", Material.RECORD_6);
	}
	
	@Override
	public void update(Player wielder)
	{
		if (isHoldingRightClick() && canPull())
		{
			pullEntities(wielder);
		}
	}
	
	@Override
	public void onAttack(CustomDamageEvent event, Player wielder)
	{
		event.AddKnockback("Magnetic Blade", -0.5d);	// Pull players with negative knockback
		log("Negative knockback!");
		// TODO: Apply negative knockback with [???] velocity/power to victims of attacks
	}

	private void pullEntities(Player player)
	{
		Vector direction = player.getLocation().getDirection().normalize().multiply(10.0d);
		Location target = player.getEyeLocation().add(direction);
		
		double targetDistance = player.getLocation().distance(target);
		
		for (LivingEntity entity : player.getWorld().getLivingEntities())
		{				
			if (entity.getEntityId() == player.getEntityId()) continue;	// Skip player pulling
			
			double otherDistance = player.getLocation().distance(entity.getLocation());
			double otherTargetDistance = target.distance(entity.getLocation());
			
			// If player is in-front of us and within pulling range
			if (otherTargetDistance < targetDistance && otherDistance <= PULL_RANGE)
			{
				UtilAction.velocity(entity, UtilAlg.getTrajectory(entity, player), 0.3, false, 0, 0, 1, true);
			}
		}
	}
	
	private boolean canPull()
	{
		return true;	// TODO: Implement cooldown? (Sounds OP without one)
	}
}