[CN2] Implemented Melee ability. Added 3 cards using it.

Deputized Protester, Menagerie Liberator and Wings of the Guard.

Mage/src/main/java/mage/abilities/keyword/MeleeAbility.java

@@ -0,0 +1,132 @@
+/*
+ *  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
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+ *
+ *  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.keyword;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.UUID;
+import mage.abilities.Ability;
+import mage.abilities.common.AttacksTriggeredAbility;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.effects.Effect;
+import mage.abilities.effects.common.continuous.BoostSourceEffect;
+import mage.constants.Duration;
+import mage.constants.WatcherScope;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.events.GameEvent.EventType;
+import mage.watchers.Watcher;
+
+/**
+ *
+ * @author emerald000
+ */
+public class MeleeAbility extends AttacksTriggeredAbility {
+
+    public MeleeAbility() {
+        super(new BoostSourceEffect(new MeleeDynamicValue(), new MeleeDynamicValue(), Duration.EndOfTurn), false);
+        this.addWatcher(new MeleeWatcher());
+    }
+
+    public MeleeAbility(final MeleeAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public MeleeAbility copy() {
+        return new MeleeAbility(this);
+    }
+
+    @Override
+    public String getRule() {
+        return "Melee <i>(Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked with a creature this combat.)</i>";
+    }
+}
+
+class MeleeWatcher extends Watcher {
+
+    private final HashMap<UUID, Set<UUID>> playersAttacked = new HashMap<>(0);
+
+    MeleeWatcher() {
+        super("MeleeWatcher", WatcherScope.GAME);
+    }
+
+    MeleeWatcher(final MeleeWatcher watcher) {
+        super(watcher);
+        this.playersAttacked.putAll(watcher.playersAttacked);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() == EventType.BEGIN_COMBAT_STEP_PRE) {
+            this.playersAttacked.clear();
+        }
+        else if (event.getType() == EventType.ATTACKER_DECLARED) {
+            Set<UUID> attackedPlayers = this.playersAttacked.getOrDefault(event.getPlayerId(), new HashSet<>(1));
+            attackedPlayers.add(event.getTargetId());
+            this.playersAttacked.put(event.getPlayerId(), attackedPlayers);
+        }
+    }
+
+    public int getNumberOfAttackedPlayers(UUID attackerId) {
+        return this.playersAttacked.get(attackerId).size();
+    }
+
+    @Override
+    public MeleeWatcher copy() {
+        return new MeleeWatcher(this);
+    }
+}
+
+class MeleeDynamicValue implements DynamicValue {
+
+    @Override
+    public int calculate(Game game, Ability sourceAbility, Effect effect) {
+        MeleeWatcher watcher = (MeleeWatcher) game.getState().getWatchers().get("MeleeWatcher");
+        if (watcher != null) {
+            return watcher.getNumberOfAttackedPlayers(sourceAbility.getControllerId());
+        }
+        return 0;
+    }
+
+    @Override
+    public MeleeDynamicValue copy() {
+        return new MeleeDynamicValue();
+    }
+
+    @Override
+    public String getMessage() {
+        return "your life total";
+    }
+
+    @Override
+    public String toString() {
+        return "X";
+    }
+}