Add DiscardOntoBattlefieldEffect and use it for existing cards. Implement card: Dodecapod

Mage/src/mage/abilities/effects/common/DiscardOntoBattlefieldEffect.java

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+/*
+ *  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.abilities.effects.common;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.ReplacementEffectImpl;
+import mage.cards.Card;
+import mage.constants.Duration;
+import mage.constants.Outcome;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.events.GameEvent.EventType;
+import mage.game.events.GameEvent;
+import mage.game.events.ZoneChangeEvent;
+import mage.game.stack.StackObject;
+import mage.players.Player;
+
+/**
+ *
+ * @author LoneFox
+ */
+public class DiscardOntoBattlefieldEffect extends ReplacementEffectImpl {
+
+    public DiscardOntoBattlefieldEffect() {
+        super(Duration.EndOfGame, Outcome.PutCardInPlay);
+        staticText = "If a spell or ability an opponent controls causes you to discard {this}, put it onto the battlefield instead of putting it into your graveyard";
+    }
+
+    public DiscardOntoBattlefieldEffect(final DiscardOntoBattlefieldEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public DiscardOntoBattlefieldEffect copy() {
+        return new DiscardOntoBattlefieldEffect(this);
+    }
+
+    @Override
+    public boolean checksEventType(GameEvent event, Game game) {
+        return event.getType() == EventType.ZONE_CHANGE;
+    }
+
+    @Override
+    public boolean applies(GameEvent event, Ability source, Game game) {
+        if (event.getTargetId().equals(source.getSourceId())) {
+            ZoneChangeEvent zcEvent = (ZoneChangeEvent) event;
+            if (zcEvent.getFromZone() == Zone.HAND && zcEvent.getToZone() == Zone.GRAVEYARD) {
+                StackObject spell = game.getStack().getStackObject(event.getSourceId());
+                if (spell != null && game.getOpponents(source.getControllerId()).contains(spell.getControllerId())) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
+        Card card = game.getCard(source.getSourceId());
+        if (card != null) {
+            Player owner = game.getPlayer(card.getOwnerId());
+            if (owner != null) {
+                if (owner.putOntoBattlefieldWithInfo(card, game, Zone.HAND, source.getSourceId())) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+}