[OTC] Implement 2 cards, refactor some exile effects ("Gonti-like") (#12118)

[OTC] Implement Gonti, Canny Acquisitor
[OTC] Implement Dream Thief's Bandana

Mage/src/main/java/mage/abilities/effects/common/ExileFaceDownTopNLibraryYouMayPlayAsLongAsExiledTargetEffect.java

@@ -0,0 +1,74 @@
+package mage.abilities.effects.common;
+
+import mage.abilities.Ability;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.dynamicvalue.common.StaticValue;
+import mage.abilities.effects.OneShotEffect;
+import mage.cards.Cards;
+import mage.cards.CardsImpl;
+import mage.constants.CastManaAdjustment;
+import mage.constants.Outcome;
+import mage.game.Game;
+import mage.players.Player;
+import mage.target.targetpointer.FixedTargets;
+
+/**
+ * This exiles the target players' top N cards of library.
+ * Each card can be looked at by the source's controller.
+ * For each card exiled this way, that player may play|cast that card as long as it stays exiled. (+ mana adjustement)
+ * e.g. [[Gonti, Canny Acquisitor]]
+ *
+ * @author Susucr
+ */
+public class ExileFaceDownTopNLibraryYouMayPlayAsLongAsExiledTargetEffect extends OneShotEffect {
+
+    private final boolean useCastSpellOnly;
+    private final CastManaAdjustment manaAdjustment;
+    private final DynamicValue value;
+
+    public ExileFaceDownTopNLibraryYouMayPlayAsLongAsExiledTargetEffect(boolean useCastSpellOnly, CastManaAdjustment manaAdjustment) {
+        this(useCastSpellOnly, manaAdjustment, 1);
+    }
+
+    public ExileFaceDownTopNLibraryYouMayPlayAsLongAsExiledTargetEffect(boolean useCastSpellOnly, CastManaAdjustment manaAdjustment, int amount) {
+        this(useCastSpellOnly, manaAdjustment, StaticValue.get(amount));
+    }
+
+    public ExileFaceDownTopNLibraryYouMayPlayAsLongAsExiledTargetEffect(boolean useCastSpellOnly, CastManaAdjustment manaAdjustment, DynamicValue value) {
+        super(Outcome.Exile);
+        this.value = value;
+        this.useCastSpellOnly = useCastSpellOnly;
+        this.manaAdjustment = manaAdjustment;
+    }
+
+    private ExileFaceDownTopNLibraryYouMayPlayAsLongAsExiledTargetEffect(final ExileFaceDownTopNLibraryYouMayPlayAsLongAsExiledTargetEffect effect) {
+        super(effect);
+        this.value = effect.value;
+        this.useCastSpellOnly = effect.useCastSpellOnly;
+        this.manaAdjustment = effect.manaAdjustment;
+    }
+
+    @Override
+    public ExileFaceDownTopNLibraryYouMayPlayAsLongAsExiledTargetEffect copy() {
+        return new ExileFaceDownTopNLibraryYouMayPlayAsLongAsExiledTargetEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(getTargetPointer().getFirst(game, source));
+        if (player == null) {
+            return false;
+        }
+
+        int amount = value.calculate(game, source, this);
+        Cards cards = new CardsImpl(player.getLibrary().getTopCards(game, amount));
+        if (cards.isEmpty()) {
+            return false;
+        }
+
+        return new ExileFaceDownYouMayPlayAsLongAsExiledTargetEffect(useCastSpellOnly, manaAdjustment)
+                .setTargetPointer(new FixedTargets(cards, game))
+                .apply(game, source);
+    }
+
+}

Mage/src/main/java/mage/abilities/effects/common/ExileFaceDownYouMayPlayAsLongAsExiledTargetEffect.java

@@ -1,7 +1,9 @@
-package mage.abilities.effects;
+package mage.abilities.effects.common;
 
 import mage.MageObject;
 import mage.abilities.Ability;
+import mage.abilities.effects.ContinuousEffect;
+import mage.abilities.effects.OneShotEffect;
 import mage.abilities.effects.common.asthought.MayLookAtTargetCardEffect;
 import mage.cards.Card;
 import mage.cards.Cards;