Implemented Reverse Polarity

Mage.Sets/src/mage/cards/r/ReversePolarity.java

@@ -0,0 +1,135 @@
+/*
+ *  Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without modification, are
+ *  permitted provided that the following conditions are met:
+ *
+ *     1. Redistributions of source code must retain the above copyright notice, this list of
+ *        conditions and the following disclaimer.
+ *
+ *     2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *        of conditions and the following disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ *  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
+ *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ *  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  The views and conclusions contained in the software and documentation are those of the
+ *  authors and should not be interpreted as representing official policies, either expressed
+ *  or implied, of BetaSteward_at_googlemail.com.
+ */
+package mage.cards.r;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.UUID;
+import mage.abilities.Ability;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.effects.Effect;
+import mage.abilities.effects.common.GainLifeEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.WatcherScope;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.watchers.Watcher;
+
+/**
+ *
+ * @author jeffwadsworth, MTGFan & L_J
+ */
+public class ReversePolarity extends CardImpl {
+
+    public ReversePolarity(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.INSTANT}, "{W}{W}");
+
+        // You gain X life, where X is twice the damage dealt to you so far this turn by artifacts.
+        this.getSpellAbility().addEffect(new GainLifeEffect(new ReversePolarityAmount(), "You gain X life, where X is twice the damage dealt to you so far this turn by artifacts"));
+        this.getSpellAbility().addWatcher(new ReversePolarityWatcher());
+    }
+
+    public ReversePolarity(final ReversePolarity card) {
+        super(card);
+    }
+
+    @Override
+    public ReversePolarity copy() {
+        return new ReversePolarity(this);
+    }
+}
+
+class ReversePolarityAmount implements DynamicValue {
+
+    @Override
+    public int calculate(Game game, Ability source, Effect effect) {
+        ReversePolarityWatcher watcher = (ReversePolarityWatcher) game.getState().getWatchers().get(ReversePolarityWatcher.class.getSimpleName());
+        if(watcher != null) {
+            return watcher.getArtifactDamageReceivedThisTurn(source.getControllerId()) * 2;
+        }
+        return 0;
+    }
+
+    @Override
+    public ReversePolarityAmount copy() {
+        return new ReversePolarityAmount();
+    }
+
+    @Override
+    public String getMessage() {
+        return "";
+    }
+}
+
+class ReversePolarityWatcher extends Watcher {
+
+    private final Map<UUID, Integer> artifactDamageReceivedThisTurn = new HashMap<>();
+
+    public ReversePolarityWatcher() {
+        super(ReversePolarityWatcher.class.getSimpleName(), WatcherScope.GAME);
+    }
+
+    public ReversePolarityWatcher(final ReversePolarityWatcher watcher) {
+        super(watcher);
+        for (Entry<UUID, Integer> entry : watcher.artifactDamageReceivedThisTurn.entrySet()) {
+            artifactDamageReceivedThisTurn.put(entry.getKey(), entry.getValue());
+        }
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() == GameEvent.EventType.DAMAGED_PLAYER) {
+            UUID playerId = event.getTargetId();
+            if (playerId != null) {
+                Permanent permanent = game.getPermanent(event.getSourceId());
+                if (permanent != null && permanent.isArtifact()) {
+                    artifactDamageReceivedThisTurn.putIfAbsent(playerId, 0);
+                    artifactDamageReceivedThisTurn.compute(playerId, (k, v) -> v + event.getAmount());
+                }
+            }
+        }
+    }
+
+    public int getArtifactDamageReceivedThisTurn(UUID playerId) {
+        return artifactDamageReceivedThisTurn.getOrDefault(playerId, 0);
+    }
+
+    @Override
+    public void reset() {
+        artifactDamageReceivedThisTurn.clear();
+    }
+
+    @Override
+    public ReversePolarityWatcher copy() {
+        return new ReversePolarityWatcher(this);
+    }
+}

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

@@ -111,6 +111,7 @@ public class Antiquities extends ExpansionSet {
         cards.add(new SetCardInfo("Primal Clay", 26, Rarity.UNCOMMON, mage.cards.p.PrimalClay.class));
         cards.add(new SetCardInfo("Rakalite", 27, Rarity.UNCOMMON, mage.cards.r.Rakalite.class));
         cards.add(new SetCardInfo("Reconstruction", 56, Rarity.COMMON, mage.cards.r.Reconstruction.class));
+        cards.add(new SetCardInfo("Reverse Polarity", 100, Rarity.COMMON, mage.cards.r.ReversePolarity.class));
         cards.add(new SetCardInfo("Rocket Launcher", 28, Rarity.UNCOMMON, mage.cards.r.RocketLauncher.class));
         cards.add(new SetCardInfo("Sage of Lat-Nam", 57, Rarity.COMMON, mage.cards.s.SageOfLatNam.class));
         cards.add(new SetCardInfo("Shapeshifter", 29, Rarity.RARE, mage.cards.s.Shapeshifter.class));

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

@@ -235,6 +235,7 @@ public class RevisedEdition extends ExpansionSet {
         cards.add(new SetCardInfo("Regrowth", 121, Rarity.UNCOMMON, mage.cards.r.Regrowth.class));
         cards.add(new SetCardInfo("Resurrection", 218, Rarity.UNCOMMON, mage.cards.r.Resurrection.class));
         cards.add(new SetCardInfo("Reverse Damage", 219, Rarity.RARE, mage.cards.r.ReverseDamage.class));
+        cards.add(new SetCardInfo("Reverse Polarity", 220, Rarity.UNCOMMON, mage.cards.r.ReversePolarity.class));
         cards.add(new SetCardInfo("Righteousness", 221, Rarity.RARE, mage.cards.r.Righteousness.class));
         cards.add(new SetCardInfo("Roc of Kher Ridges", 171, Rarity.RARE, mage.cards.r.RocOfKherRidges.class));
         cards.add(new SetCardInfo("Rock Hydra", 172, Rarity.RARE, mage.cards.r.RockHydra.class));