Handle merged permanent as commander

forge-game/src/main/java/forge/game/GameAction.java

@@ -132,6 +132,7 @@ public class GameAction {
 
         Card copied = null;
         Card lastKnownInfo = null;
+        Card commanderEffect = null; // The effect card of commander replacement effect
 
         // get the LKI from above like ChangeZoneEffect
         if (params != null && params.containsKey(AbilityKey.CardLKI)) {
@@ -231,6 +232,26 @@ public class GameAction {
         copied.updateStateForView();
 
         if (!suppress) {
+            // Temporary disable commander replacement effect
+            // 903.9a
+            if (fromBattlefield && c.isCommander() && c.hasMergedCard()) {
+                // Find the commander replacement effect "card"
+                CardCollectionView comCards = c.getOwner().getCardsIn(ZoneType.Command);
+                for (final Card effCard : comCards) {
+                    for (final ReplacementEffect re : effCard.getReplacementEffects()) {
+                        if (re.getMode() == ReplacementType.Moved && "Card.EffectSource+YouOwn".equals(re.getParam("ValidCard"))) {
+                            commanderEffect = effCard;
+                            break;
+                        }
+                    }
+                    if (commanderEffect != null) break;
+                }
+                // Disable the commander replacement effect
+                for (final ReplacementEffect re : commanderEffect.getReplacementEffects()) {
+                    re.setSuppressed(true);
+                }
+            }
+
             if (zoneFrom == null) {
                 copied.getOwner().addInboundToken(copied);
             }
@@ -362,12 +383,24 @@ public class GameAction {
             }
         }
 
-        // "enter the battlefield as a copy" - apply code here
-        // but how to query for input here and continue later while the callers assume synchronous result?
         if (mergedCards != null) {
+            // Move components of merged permanet here
+            // Also handle 721.3e and 903.9a
+            boolean wasToken = c.isToken();
+            if (commanderEffect != null) {
+                for (final ReplacementEffect re : commanderEffect.getReplacementEffects()) {
+                    re.setSuppressed(false);
+                }
+            }
+            // Change zone of original card so components isToken() and isCommander() return correct value
+            // when running replacement effects here
+            c.setZone(zoneTo);
             for (final Card card : mergedCards) {
-                // 721.3e
-                if (c.isToken()) {
+                if (card.isRealCommander()) {
+                    card.setMoveToCommandZone(true);
+                }
+                // 721.3e & 903.9a
+                if (wasToken && !card.isToken() || card.isRealCommander()) {
                     Map<AbilityKey, Object> repParams = AbilityKey.mapFromAffected(card);
                     repParams.put(AbilityKey.CardLKI, card);
                     repParams.put(AbilityKey.Cause, cause);
@@ -389,6 +422,8 @@ public class GameAction {
                 card.setZone(zoneTo);
             }
         } else {
+            // "enter the battlefield as a copy" - apply code here
+            // but how to query for input here and continue later while the callers assume synchronous result?
             zoneTo.add(copied, position, lastKnownInfo); // the modified state of the card is also reported here (e.g. for Morbid + Awaken)
             c.setZone(zoneTo);
         }
@@ -611,7 +646,7 @@ public class GameAction {
             AttachEffect.attachAuraOnIndirectEnterBattlefield(c);
         }
 
-        if (c.isCommander()) {
+        if (c.isRealCommander()) {
             c.setMoveToCommandZone(true);
         }
 
@@ -1234,7 +1269,7 @@ public class GameAction {
     }
 
     private boolean stateBasedAction903_9a(Card c) {
-        if (c.isCommander() && c.canMoveToCommandZone()) {
+        if (c.isRealCommander() && c.canMoveToCommandZone()) {
             c.setMoveToCommandZone(false);
             if (c.getOwner().getController().confirmAction(c.getSpellPermanent(), PlayerActionConfirmMode.ChangeZoneToAltDestination, c.getName() + ": If a commander is in a graveyard or in exile and that card was put into that zone since the last time state-based actions were checked, its owner may put it into the command zone.")) {
                 moveTo(c.getOwner().getZone(ZoneType.Command), c, null);

forge-game/src/main/java/forge/game/ability/effects/MutateEffect.java

@@ -80,6 +80,10 @@ public class MutateEffect extends SpellAbilityEffect {
         host.setFlipped(target.isFlipped());
         target.setTimesMutated(target.getTimesMutated() + 1);
         target.updateTokenView();
+        if (host.isCommander()) {
+            target.updateCommanderView();
+            host.getOwner().updateMergedCommanderCast(target, host);
+        }
 
         game.getTriggerHandler().runTrigger(TriggerType.Mutates, AbilityKey.mapFromCard(target), false);
     }

forge-game/src/main/java/forge/game/card/Card.java

@@ -2757,7 +2757,7 @@ public class Card extends GameEntity implements Comparable<Card>, IHasSVars {
 
     // is this "Card" supposed to be a token?
     public final boolean isToken() {
-        if (hasMergedCard()) {
+        if (isInZone(ZoneType.Battlefield) && hasMergedCard()) {
             return getTopMergedCard().token;
         }
         return token;
@@ -6240,6 +6240,13 @@ public class Card extends GameEntity implements Comparable<Card>, IHasSVars {
     public boolean isCommander() {
         if (this.getMeldedWith() != null && this.getMeldedWith().isCommander())
             return true;
+        if (isInZone(ZoneType.Battlefield) && hasMergedCard()) {
+            for (final Card c : getMergedCards())
+                if (c.isCommander) return true;
+        }
+        return isCommander;
+    }
+    public boolean isRealCommander() {
         return isCommander;
     }
     public void setCommander(boolean b) {
@@ -6247,6 +6254,9 @@ public class Card extends GameEntity implements Comparable<Card>, IHasSVars {
         isCommander = b;
         view.updateCommander(this);
     }
+    public void updateCommanderView() {
+        view.updateCommander(this);
+    }
 
     public boolean canMoveToCommandZone() {
         return canMoveToCommandZone;

forge-game/src/main/java/forge/game/card/CardFactory.java

@@ -101,7 +101,7 @@ public class CardFactory {
         for (final Card o : in.getImprintedCards()) {
             out.addImprintedCard(o);
         }
-        out.setCommander(in.isCommander());
+        out.setCommander(in.isRealCommander());
         //out.setFaceDown(in.isFaceDown());
 
         return out;

forge-game/src/main/java/forge/game/player/Player.java

@@ -2886,6 +2886,10 @@ public class Player extends GameEntity implements Comparable<Player> {
         getGame().fireEvent(new GameEventPlayerStatsChanged(this, false));
     }
 
+    public void updateMergedCommanderCast(Card target, Card commander) {
+        getView().updateMergedCommanderCast(this, target, commander);
+    }
+
     public int getTotalCommanderCast() {
         int result = 0;
         for (Integer i : commanderCast.values()) {

forge-game/src/main/java/forge/game/player/PlayerView.java

@@ -351,6 +351,15 @@ public class PlayerView extends GameEntityView {
         set(TrackableProperty.CommanderCast, map);
     }
 
+    void updateMergedCommanderCast(Player p, Card target, Card commander) {
+        Map<Integer, Integer> map = get(TrackableProperty.CommanderCast);
+        if (map == null) {
+            map = Maps.newHashMap();
+        }
+        map.put(target.getId(), p.getCommanderCast(commander));
+        set(TrackableProperty.CommanderCast, map);
+    }
+
     public PlayerView getMindSlaveMaster() {
         return get(TrackableProperty.MindSlaveMaster);
     }