Package mage.sets.khansoftarkir

Source Code of mage.sets.khansoftarkir.SuspensionFieldReturnExiledCreatureEffect

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package mage.sets.khansoftarkir;

import java.util.LinkedList;
import java.util.UUID;
import mage.abilities.Ability;
import mage.abilities.TriggeredAbilityImpl;
import mage.abilities.common.EntersBattlefieldTriggeredAbility;
import mage.abilities.effects.OneShotEffect;
import mage.abilities.effects.common.ExileTargetEffect;
import mage.cards.Card;
import mage.cards.CardImpl;
import mage.constants.CardType;
import mage.constants.Outcome;
import mage.constants.Rarity;
import mage.constants.Zone;
import mage.filter.Filter.ComparisonType;
import mage.filter.common.FilterCreaturePermanent;
import mage.filter.predicate.mageobject.ToughnessPredicate;
import mage.game.ExileZone;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.events.ZoneChangeEvent;
import mage.game.permanent.Permanent;
import mage.players.Player;
import mage.target.common.TargetCreaturePermanent;

/**
*
* @author emerald000
*/
public class SuspensionField extends CardImpl {

    private final static FilterCreaturePermanent filter = new FilterCreaturePermanent("creature with toughness 3 or greater");
    static {
        filter.add(new ToughnessPredicate(ComparisonType.GreaterThan, 2));
    }   
   
    public SuspensionField(UUID ownerId) {
        super(ownerId, 25, "Suspension Field", Rarity.UNCOMMON, new CardType[]{CardType.ENCHANTMENT}, "{1}{W}");
        this.expansionSetCode = "KTK";

        this.color.setWhite(true);

        // When Suspension Field enters the battlefield, you may exile target creature with toughness 3 or greater until Suspension Field leaves the battlefield.
        Ability ability = new EntersBattlefieldTriggeredAbility(new SuspensionFieldExileEffect(), true);
        ability.addTarget(new TargetCreaturePermanent(filter));
        this.addAbility(ability);
        // Implemented as triggered effect that doesn't uses the stack (implementation with watcher does not work correctly because if the returned creature
        // has a DiesTriggeredAll ability it triggers for the dying / battlefield leaving source object, what shouldn't happen)
        this.addAbility(new SuspensionFieldReturnExiledAbility());  
    }

    public SuspensionField(final SuspensionField card) {
        super(card);
    }

    @Override
    public SuspensionField copy() {
        return new SuspensionField(this);
    }
}

class SuspensionFieldExileEffect extends OneShotEffect {

    SuspensionFieldExileEffect() {
        super(Outcome.Exile);
        this.staticText = "you may exile target creature with toughness 3 or greater until {this} leaves the battlefield. <i>(That creature returns under its owner's control.)</i>";
    }

    SuspensionFieldExileEffect(final SuspensionFieldExileEffect effect) {
        super(effect);
    }

    @Override
    public SuspensionFieldExileEffect copy() {
        return new SuspensionFieldExileEffect(this);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Permanent sourcePermanent = game.getPermanent(source.getSourceId());
        // If Suspension Field leaves the battlefield before its triggered ability resolves, the target won't be exiled.
        if (sourcePermanent != null) {
            return new ExileTargetEffect(source.getSourceId(), sourcePermanent.getName()).apply(game, source);
        }
        return false;
    }
}

class SuspensionFieldReturnExiledAbility extends TriggeredAbilityImpl {

    SuspensionFieldReturnExiledAbility() {
        super(Zone.BATTLEFIELD, new SuspensionFieldReturnExiledCreatureEffect());
        this.usesStack = false;
        this.setRuleVisible(false);
    }

    SuspensionFieldReturnExiledAbility(final SuspensionFieldReturnExiledAbility ability) {
        super(ability);
    }

    @Override
    public SuspensionFieldReturnExiledAbility copy() {
        return new SuspensionFieldReturnExiledAbility(this);
    }

    @Override
    public boolean checkTrigger(GameEvent event, Game game) {
        if (event.getType() == GameEvent.EventType.ZONE_CHANGE && event.getTargetId().equals(this.getSourceId())) {
            ZoneChangeEvent zEvent = (ZoneChangeEvent) event;
            if (zEvent.getFromZone() == Zone.BATTLEFIELD) {
                return true;
            }
        }
        return false;
    }
}

class SuspensionFieldReturnExiledCreatureEffect extends OneShotEffect {

    SuspensionFieldReturnExiledCreatureEffect() {
        super(Outcome.Benefit);
        this.staticText = "Return exiled permanent";
    }

    SuspensionFieldReturnExiledCreatureEffect(final SuspensionFieldReturnExiledCreatureEffect effect) {
        super(effect);
    }

    @Override
    public SuspensionFieldReturnExiledCreatureEffect copy() {
        return new SuspensionFieldReturnExiledCreatureEffect(this);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Player controller = game.getPlayer(source.getControllerId());
        if (controller != null) {
            ExileZone exile = game.getExile().getExileZone(source.getSourceId());
            Card sourceCard = game.getCard(source.getSourceId());
            if (exile != null && sourceCard != null) {
                LinkedList<UUID> cards = new LinkedList<>(exile);
                for (UUID cardId : cards) {
                    Card card = game.getCard(cardId);
                    card.moveToZone(Zone.BATTLEFIELD, source.getSourceId(), game, false);
                    game.informPlayers(new StringBuilder(sourceCard.getName()).append(": ").append(card.getName()).append(" returns to battlefield from exile").toString());
                }
                exile.clear();
                return true;
            }           
        }
        return false;
    }
}
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