Implemented Akim, the Soaring Wind, and new CreatedTokenEvent (#6431)

* Implemented Akim, the Soaring Wind, and new CreatedTokenEvent, that can be used to for TriggeredEvents.

* Formatting, and added Condition to Akim triggered Ability.

* Added Condition and ConditionHint to Akim.

Mage.Sets/src/mage/cards/a/AkimTheSoaringWind.java

@@ -0,0 +1,175 @@
+package mage.cards.a;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.TriggeredAbility;
+import mage.abilities.TriggeredAbilityImpl;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.condition.Condition;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.effects.common.CreateTokenEffect;
+import mage.abilities.effects.common.continuous.GainAbilityControlledEffect;
+import mage.abilities.hint.ConditionHint;
+import mage.abilities.keyword.DoubleStrikeAbility;
+import mage.abilities.keyword.FlyingAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.filter.common.FilterCreaturePermanent;
+import mage.filter.predicate.permanent.TokenPredicate;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.game.permanent.PermanentToken;
+import mage.game.permanent.token.BirdToken;
+import mage.players.Player;
+import mage.watchers.Watcher;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+/**
+ * @author AsterAether
+ */
+public final class AkimTheSoaringWind extends CardImpl {
+
+    private static final FilterCreaturePermanent filter = new FilterCreaturePermanent("Creature tokens");
+
+    static {
+        filter.add(TokenPredicate.instance);
+    }
+
+    public AkimTheSoaringWind(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{2}{U}{R}{W}");
+
+        this.addSuperType(SuperType.LEGENDARY);
+        this.subtype.add(SubType.BIRD);
+        this.subtype.add(SubType.DINOSAUR);
+        this.power = new MageInt(3);
+        this.toughness = new MageInt(4);
+
+        // Flying
+        this.addAbility(FlyingAbility.getInstance());
+
+        // Whenever you create one or more tokens for the first time each turn, create a 1/1 white Bird creature token with flying.
+        this.addAbility(
+                new AkimTheSoaringTokenAbility()
+                        .addHint(new ConditionHint(AkimTheSoaringWindCondition.instance,
+                                "You create one or more tokens for the first time each turn")),
+                new AkimTheSoaringWindWatcher()
+        );
+
+        // {3}{U}{R}{W}: Creature tokens you control gain double strike until end of turn.
+        this.addAbility(new SimpleActivatedAbility(
+                new GainAbilityControlledEffect(
+                        DoubleStrikeAbility.getInstance(),
+                        Duration.EndOfTurn,
+                        filter,
+                        false),
+                new ManaCostsImpl("{3}{U}{R}{W}"))
+        );
+    }
+
+    private AkimTheSoaringWind(final AkimTheSoaringWind card) {
+        super(card);
+    }
+
+    @Override
+    public AkimTheSoaringWind copy() {
+        return new AkimTheSoaringWind(this);
+    }
+}
+
+enum AkimTheSoaringWindCondition implements Condition {
+
+    instance;
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player controller = game.getPlayer(source.getControllerId());
+        AkimTheSoaringWindWatcher watcher = game.getState().getWatcher(AkimTheSoaringWindWatcher.class);
+        return watcher != null && watcher.firstToken(controller.getId());
+    }
+
+    @Override
+    public String toString() {
+        return "you create one or more tokens for the first time each turn";
+    }
+}
+
+class AkimTheSoaringTokenAbility extends TriggeredAbilityImpl {
+
+    public AkimTheSoaringTokenAbility() {
+        super(Zone.BATTLEFIELD, new CreateTokenEffect(new BirdToken(), 1), false);
+    }
+
+    public AkimTheSoaringTokenAbility(final AkimTheSoaringTokenAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.CREATED_TOKEN;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        if (!AkimTheSoaringWindCondition.instance.apply(game, this)) {
+            return false;
+        }
+
+        Permanent permanent = game.getPermanent(event.getTargetId());
+        return permanent != null && permanent.isControlledBy(this.getControllerId());
+    }
+
+    @Override
+    public TriggeredAbility copy() {
+        return new AkimTheSoaringTokenAbility(this);
+    }
+
+    @Override
+    public String getRule() {
+        return "Whenever you create one or more tokens for the first time each turn, "
+                + "create a 1/1 white Bird creature token with flying.";
+    }
+}
+
+class AkimTheSoaringWindWatcher extends Watcher {
+
+    public enum TokenState {
+        NoToken,
+        FirstToken,
+        MoreThanOneToken
+    }
+
+    private final Map<UUID, TokenState> playerIds = new HashMap<>();
+
+    AkimTheSoaringWindWatcher() {
+        super(WatcherScope.GAME);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() != GameEvent.EventType.CREATED_TOKEN) {
+            return;
+        }
+        Permanent permanent = game.getPermanent(event.getTargetId());
+        if (permanent instanceof PermanentToken) {
+            if (!playerIds.containsKey(permanent.getControllerId())) {
+                playerIds.put(permanent.getControllerId(), TokenState.FirstToken);
+            } else {
+                playerIds.put(permanent.getControllerId(), TokenState.MoreThanOneToken);
+            }
+        }
+    }
+
+    @Override
+    public void reset() {
+        playerIds.clear();
+    }
+
+    boolean firstToken(UUID playerId) {
+        return playerIds.getOrDefault(playerId, TokenState.NoToken) == TokenState.FirstToken;
+    }
+}

Mage.Sets/src/mage/sets/Commander2020Edition.java

@@ -38,6 +38,7 @@ public final class Commander2020Edition extends ExpansionSet {
         cards.add(new SetCardInfo("Aerial Responder", 72, Rarity.UNCOMMON, mage.cards.a.AerialResponder.class));
         cards.add(new SetCardInfo("Agitator Ant", 49, Rarity.RARE, mage.cards.a.AgitatorAnt.class));
         cards.add(new SetCardInfo("Ajani Unyielding", 201, Rarity.MYTHIC, mage.cards.a.AjaniUnyielding.class));
+        cards.add(new SetCardInfo("Akim, the Soaring Wind", 6, Rarity.MYTHIC, mage.cards.a.AkimTheSoaringWind.class));
         cards.add(new SetCardInfo("Akroma's Vengeance", 74, Rarity.RARE, mage.cards.a.AkromasVengeance.class));
         cards.add(new SetCardInfo("Akroma, Angel of Wrath", 73, Rarity.MYTHIC, mage.cards.a.AkromaAngelOfWrath.class));
         cards.add(new SetCardInfo("Alesha, Who Smiles at Death", 143, Rarity.RARE, mage.cards.a.AleshaWhoSmilesAtDeath.class));

Mage/src/main/java/mage/game/events/CreatedTokenEvent.java

@@ -0,0 +1,12 @@
+package mage.game.events;
+
+import mage.game.permanent.PermanentToken;
+
+import java.util.UUID;
+
+public class CreatedTokenEvent extends GameEvent {
+
+    public CreatedTokenEvent(UUID sourceId, PermanentToken tokenPerm) {
+        super(EventType.CREATED_TOKEN, tokenPerm.getId(), sourceId, tokenPerm.getControllerId());
+    }
+}

Mage/src/main/java/mage/game/events/GameEvent.java

@@ -316,7 +316,7 @@ public class GameEvent implements Serializable {
          */
         LOST_CONTROL,
         GAIN_CONTROL, GAINED_CONTROL,
-        CREATE_TOKEN,
+        CREATE_TOKEN, CREATED_TOKEN,
         /* REGENERATE
          targetId    id of the creature to regenerate
          sourceId    sourceId of the effect doing the regeneration

Mage/src/main/java/mage/game/permanent/token/TokenImpl.java

@@ -8,6 +8,7 @@ import mage.cards.Card;
 import mage.constants.Zone;
 import mage.game.Game;
 import mage.game.events.CreateTokenEvent;
+import mage.game.events.CreatedTokenEvent;
 import mage.game.events.GameEvent;
 import mage.game.events.GameEvent.EventType;
 import mage.game.events.ZoneChangeEvent;
@@ -208,6 +209,9 @@ public abstract class TokenImpl extends MageObjectImpl implements Token {
                 ((TokenImpl) token).lastAddedTokenId = permanent.getId();
             }
             game.addSimultaneousEvent(new ZoneChangeEvent(permanent, permanent.getControllerId(), Zone.OUTSIDE, Zone.BATTLEFIELD));
+            if (permanent instanceof PermanentToken) {
+                game.addSimultaneousEvent(new CreatedTokenEvent(event.getSourceId(), (PermanentToken) permanent));
+            }
             if (attacking && game.getCombat() != null && game.getActivePlayerId().equals(permanent.getControllerId())) {
                 game.getCombat().addAttackingCreature(permanent.getId(), game, attackedPlayer);
             }