minecraft-kajetans-mod/src/main/java/me/km/effects/active/AreaDamage.java

package me.km.effects.active;

import me.km.KajetansMod;
import me.km.effects.ActiveEffectBase;
import me.km.effects.EffectUtils;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.util.DamageSource;
import net.minecraft.util.EnumParticleTypes;
import net.minecraft.util.math.Vec3d;
import net.minecraft.world.WorldServer;

public class AreaDamage extends ActiveEffectBase
{
    @Override
    protected boolean executeEffect(EntityPlayerMP p, int power) 
    {       
        if(!KajetansMod.playerbank.getData(p).hasData("aoe"))
        {
            // just adding a bit to time to make sure the last call works
            KajetansMod.playerbank.getData(p).addGoodTimedData("aoe", true, power * 20 + 3, "AOE Schaden", 61);
            for(int i = 0; i < power; i++)
            {
                KajetansMod.scheduler.scheduleTask(() -> attack(p), i * 20);
            }
            return true;
        }
        return false;
    } 
    
    private void attack(EntityPlayerMP p)
    {
        if(KajetansMod.playerbank.getData(p).hasData("aoe"))
        {
            WorldServer w = p.getServerWorld();
            Vec3d v = p.getPositionVector();
            EffectUtils.playEffectCircleWithData(w, v, EnumParticleTypes.FLAME, 5, 12);
            EffectUtils.playEffectCircleWithData(w, v, EnumParticleTypes.FLAME, 4, 12);
            EffectUtils.playEffectCircleWithData(w, v, EnumParticleTypes.FLAME, 3, 12);
            EffectUtils.playEffectCircleWithData(w, v, EnumParticleTypes.FLAME, 2, 12);
            EffectUtils.playEffectCircleWithData(w, v, EnumParticleTypes.FLAME, 1, 12);
            DamageSource ds = DamageSource.causeMobDamage(p);
            EffectUtils.getEntsOfNotGuild(p, 5).stream().forEach((m) -> 
            {
                m.attackEntityFrom(ds, 2);   
            });
        }
    }

    @Override
    protected int getManaCost(int manaFactor) 
    {
        return 1;
    }
}