GateToTheAether.java example

Explorer
mage-master
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package mage.cards.g;

import mage.abilities.Ability;
import mage.abilities.common.BeginningOfUpkeepTriggeredAbility;
import mage.abilities.effects.OneShotEffect;
import mage.cards.Card;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.cards.CardsImpl;
import mage.constants.CardType;
import mage.constants.Outcome;
import mage.constants.TargetController;
import mage.constants.Zone;
import mage.game.Game;
import mage.players.Player;

import java.util.UUID;

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

    public GateToTheAether(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId,setInfo,new CardType[]{CardType.ARTIFACT},"{6}");

        // At the beginning of each player's upkeep, that player reveals the top card of his or her library. If it's an artifact, creature, enchantment, or land card, the player may put it onto the battlefield.
        this.addAbility(new BeginningOfUpkeepTriggeredAbility(Zone.BATTLEFIELD, new GateToTheAetherEffect(), TargetController.ANY, false, true));
    }

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

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

class GateToTheAetherEffect extends OneShotEffect {

    GateToTheAetherEffect() {
        super(Outcome.PutCardInPlay);
        this.staticText = "that player reveals the top card of his or her library. If it's an artifact, creature, enchantment, or land card, the player may put it onto the battlefield";
    }

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

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

    @Override
    public boolean apply(Game game, Ability source) {
        Player activePlayer = game.getPlayer(this.getTargetPointer().getFirst(game, source));
        if (activePlayer != null) {
            Card card = activePlayer.getLibrary().getFromTop(game);
            if (card != null) {
                activePlayer.revealCards("Gate to the Aether", new CardsImpl(card), game);
                if (card.isArtifact()
                        || card.isCreature()
                        || card.isEnchantment()
                        || card.isLand()) {
                    if (activePlayer.chooseUse(Outcome.PutCardInPlay, "Put " + card.getName() + " onto the battlefield?", source, game)) {
                        activePlayer.moveCards(card, Zone.BATTLEFIELD, source, game);
                    }
                }
            }
            return true;
        }
        return false;
    }
}