foul-magics/Mage/src/main/java/mage/abilities/condition/common/AttackedPlayersPoisonedCondition.java

package mage.abilities.condition.common;

import mage.abilities.Ability;
import mage.abilities.condition.Condition;
import mage.counters.CounterType;
import mage.game.Game;
import mage.game.combat.CombatGroup;

import java.util.Objects;

/**
 * A condition which checks whether any players being attacked are poisoned
 * (have one or more poison counters on them)
 *
 * @author alexander-novo
 */
public enum AttackedPlayersPoisonedCondition implements Condition {
    instance;

    @Override
    public boolean apply(Game game, Ability source) {
        return game.getCombat()
                .getGroups()
                .stream()
                .map(CombatGroup::getDefenderId)
                .filter(Objects::nonNull)
                .distinct()
                .map(game::getPlayer)
                .filter(Objects::nonNull)
                .anyMatch(player -> player.getCountersCount(CounterType.POISON) > 0);
    }

    @Override
    public String toString() {
        return "one or more players being attacked are poisoned";
    }
}