[J21] Implemented Shoreline Scout

Mage.Sets/src/mage/cards/s/ShorelineScout.java

@@ -0,0 +1,134 @@
+package mage.cards.s;
+
+import mage.MageInt;
+import mage.MageObjectReference;
+import mage.abilities.Ability;
+import mage.abilities.common.EntersBattlefieldTriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.condition.Condition;
+import mage.abilities.costs.common.ExileFromHandCost;
+import mage.abilities.decorator.ConditionalContinuousEffect;
+import mage.abilities.effects.common.ConjureCardEffect;
+import mage.abilities.effects.common.DoIfCostPaid;
+import mage.abilities.effects.common.continuous.BoostSourceEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.Duration;
+import mage.constants.SubType;
+import mage.constants.WatcherScope;
+import mage.filter.FilterCard;
+import mage.filter.predicate.Predicates;
+import mage.game.Game;
+import mage.game.events.EntersTheBattlefieldEvent;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.target.common.TargetCardInHand;
+import mage.watchers.Watcher;
+
+import java.util.*;
+
+/**
+ * @author TheElk801
+ */
+public final class ShorelineScout extends CardImpl {
+
+    private static final FilterCard filter = new FilterCard("a Merfolk card or a land card from your hand");
+
+    static {
+        filter.add(Predicates.or(
+                SubType.MERFOLK.getPredicate(),
+                CardType.LAND.getPredicate()
+        ));
+    }
+
+    public ShorelineScout(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{U}");
+
+        this.subtype.add(SubType.MERFOLK);
+        this.subtype.add(SubType.SCOUT);
+        this.power = new MageInt(1);
+        this.toughness = new MageInt(1);
+
+        // When Shoreline Scout enters the battlefield, you may exile a Merfolk card or a land card from your hand. If you do, conjure a Tropical Island card into your hand.
+        this.addAbility(new EntersBattlefieldTriggeredAbility(
+                new DoIfCostPaid(
+                        new ConjureCardEffect("Tropical Island"),
+                        new ExileFromHandCost(new TargetCardInHand(filter))
+                )
+        ));
+
+        // As long as another Merfolk or an Island entered the battlefield under your control this turn, Shoreline Scout gets +1/+0.
+        this.addAbility(new SimpleStaticAbility(new ConditionalContinuousEffect(
+                new BoostSourceEffect(1, 0, Duration.WhileOnBattlefield),
+                ShorelineScoutCondition.instance, "as long as another Merfolk " +
+                "or an Island entered the battlefield under your control this turn, {this} gets +1/+0"
+        )), new ShorelineScoutWatcher());
+    }
+
+    private ShorelineScout(final ShorelineScout card) {
+        super(card);
+    }
+
+    @Override
+    public ShorelineScout copy() {
+        return new ShorelineScout(this);
+    }
+}
+
+enum ShorelineScoutCondition implements Condition {
+    instance;
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return ShorelineScoutWatcher.checkPlayer(source, game);
+    }
+}
+
+class ShorelineScoutWatcher extends Watcher {
+
+    private final Set<UUID> islandSet = new HashSet<>();
+    private final Map<UUID, Set<MageObjectReference>> merfolkMap = new HashMap<>();
+    private static final Set<MageObjectReference> emptySet = Collections.unmodifiableSet(new HashSet<>());
+
+    ShorelineScoutWatcher() {
+        super(WatcherScope.GAME);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() != GameEvent.EventType.ENTERS_THE_BATTLEFIELD) {
+            return;
+        }
+        Permanent permanent = ((EntersTheBattlefieldEvent) event).getTarget();
+        if (permanent == null) {
+            return;
+        }
+        if (permanent.hasSubtype(SubType.ISLAND, game)) {
+            islandSet.add(permanent.getControllerId());
+        } else if (permanent.hasSubtype(SubType.MERFOLK, game)) {
+            merfolkMap
+                    .computeIfAbsent(permanent.getControllerId(), x -> new HashSet<>())
+                    .add(new MageObjectReference(permanent, game));
+        }
+    }
+
+    @Override
+    public void reset() {
+        super.reset();
+        islandSet.clear();
+        merfolkMap.clear();
+    }
+
+    static boolean checkPlayer(Ability source, Game game) {
+        ShorelineScoutWatcher watcher = game.getState().getWatcher(ShorelineScoutWatcher.class);
+        return watcher
+                .islandSet
+                .contains(source.getControllerId())
+                || watcher
+                .merfolkMap
+                .getOrDefault(source.getControllerId(), emptySet)
+                .stream()
+                .anyMatch(mor -> !mor.refersTo(source.getSourceObject(game), game));
+    }
+}

Mage.Sets/src/mage/sets/JumpstartHistoricHorizons.java

@@ -23,6 +23,7 @@ public final class JumpstartHistoricHorizons extends ExpansionSet {
         cards.add(new SetCardInfo("Bounty of the Deep", 7, Rarity.UNCOMMON, mage.cards.b.BountyOfTheDeep.class));
         cards.add(new SetCardInfo("Faceless Agent", 31, Rarity.COMMON, mage.cards.f.FacelessAgent.class));
         cards.add(new SetCardInfo("Manor Guardian", 16, Rarity.UNCOMMON, mage.cards.m.ManorGuardian.class));
+        cards.add(new SetCardInfo("Shoreline Scout", 11, Rarity.UNCOMMON, mage.cards.s.ShorelineScout.class));
         cards.add(new SetCardInfo("Skyshroud Lookout", 29, Rarity.UNCOMMON, mage.cards.s.SkyshroudLookout.class));
         cards.add(new SetCardInfo("Wingsteed Trainer", 6, Rarity.UNCOMMON, mage.cards.w.WingsteedTrainer.class));
     }