Implement DoubleVision

Mage.Sets/src/mage/cards/d/DoubleVision.java

@@ -0,0 +1,86 @@
+package mage.cards.d;
+
+import mage.abilities.common.SpellCastControllerTriggeredAbility;
+import mage.abilities.effects.common.CopyTargetSpellEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.filter.common.FilterInstantOrSorcerySpell;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.stack.Spell;
+import mage.target.targetpointer.FixedTarget;
+import mage.watchers.common.SpellsCastWatcher;
+
+import java.util.List;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
+/**
+ * @author htrajan
+ */
+public final class DoubleVision extends CardImpl {
+
+    public DoubleVision(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{3}{R}{R}");
+
+        // Whenever you cast your first instant or sorcery spell each turn, copy that spell. You may choose new targets for the copy.
+        this.addAbility(new DoubleVisionCopyTriggeredAbility(), new SpellsCastWatcher());
+    }
+
+    private DoubleVision(final DoubleVision card) {
+        super(card);
+    }
+
+    @Override
+    public DoubleVision copy() {
+        return new DoubleVision(this);
+    }
+}
+
+class DoubleVisionCopyTriggeredAbility extends SpellCastControllerTriggeredAbility {
+
+    DoubleVisionCopyTriggeredAbility() {
+        super(new CopyTargetSpellEffect(true), new FilterInstantOrSorcerySpell(), false);
+    }
+
+    DoubleVisionCopyTriggeredAbility(DoubleVisionCopyTriggeredAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public DoubleVisionCopyTriggeredAbility copy() {
+        return new DoubleVisionCopyTriggeredAbility(this);
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        if (super.checkTrigger(event, game)) {
+            Spell spell = game.getStack().getSpell(event.getTargetId());
+            if (isFirstInstantOrSorceryCastByPlayerOnTurn(spell, game)) {
+                this.getEffects().get(0).setTargetPointer(new FixedTarget(spell.getId()));
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private boolean isFirstInstantOrSorceryCastByPlayerOnTurn(Spell spell, Game game) {
+        if (spell != null) {
+            SpellsCastWatcher watcher = game.getState().getWatcher(SpellsCastWatcher.class);
+            if (watcher != null) {
+                List<Spell> eligibleSpells = watcher.getSpellsCastThisTurn(this.getControllerId())
+                        .stream()
+                        .filter(s -> s.isInstant() || s.isSorcery())
+                        .collect(Collectors.toList());
+                return eligibleSpells.size() == 1 && eligibleSpells.get(0).getId().equals(spell.getId());
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public String getRule() {
+        return "Whenever you cast your first instant or sorcery spell each turn, copy that spell. You may choose new targets for the copy.";
+    }
+}

Mage.Sets/src/mage/sets/CoreSet2021.java

@@ -33,6 +33,7 @@ public final class CoreSet2021 extends ExpansionSet {
         this.ratioBoosterMythic = 8;
         this.maxCardNumberInBooster = 274;
 
+        cards.add(new SetCardInfo("Double Vision", 142, Rarity.RARE, mage.cards.d.DoubleVision.class));
         cards.add(new SetCardInfo("Mangara, the Diplomat", 27, Rarity.MYTHIC, mage.cards.m.MangaraTheDiplomat.class));
     }
 }