CantAttackAlone and CantBlockAlone abilities

Mage.Sets/src/mage/sets/magic2013/OdricMasterTactician.java

@@ -152,6 +152,7 @@ class OdricMasterTacticianEffect extends ReplacementEffectImpl<OdricMasterTactic
             if (game.isPaused() || game.isGameOver()) {
                 return true;
             }
+            game.getCombat().checkBlockRestrictions(game.getPlayer(defenderId), game);
             game.fireEvent(GameEvent.getEvent(GameEvent.EventType.DECLARED_BLOCKERS, defenderId, defenderId));
         }
 

Mage/src/mage/abilities/keyword/CantAttackAloneAbility.java

@@ -0,0 +1,66 @@
+/*
+* 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.keyword;
+
+import mage.Constants.Zone;
+import mage.abilities.MageSingleton;
+import mage.abilities.StaticAbility;
+
+import java.io.ObjectStreamException;
+
+/**
+ * @author magenoxx_at_googlemail.com
+ */
+public class CantAttackAloneAbility extends StaticAbility<CantAttackAloneAbility> implements MageSingleton {
+
+    private static final CantAttackAloneAbility fINSTANCE = new CantAttackAloneAbility();
+
+    private Object readResolve() throws ObjectStreamException {
+        return fINSTANCE;
+    }
+
+    public static CantAttackAloneAbility getInstance() {
+        return fINSTANCE;
+    }
+
+    private CantAttackAloneAbility() {
+        super(Zone.BATTLEFIELD, null);
+    }
+
+    @Override
+    public String getRule() {
+        return "Can't attack alone";
+    }
+
+    @Override
+    public CantAttackAloneAbility copy() {
+        return fINSTANCE;
+    }
+
+}

Mage/src/mage/abilities/keyword/CantBlockAloneAbility.java

@@ -0,0 +1,66 @@
+/*
+* 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.keyword;
+
+import mage.Constants.Zone;
+import mage.abilities.MageSingleton;
+import mage.abilities.StaticAbility;
+
+import java.io.ObjectStreamException;
+
+/**
+ * @author magenoxx_at_googlemail.com
+ */
+public class CantBlockAloneAbility extends StaticAbility<CantBlockAloneAbility> implements MageSingleton {
+
+    private static final CantBlockAloneAbility fINSTANCE = new CantBlockAloneAbility();
+
+    private Object readResolve() throws ObjectStreamException {
+        return fINSTANCE;
+    }
+
+    public static CantBlockAloneAbility getInstance() {
+        return fINSTANCE;
+    }
+
+    private CantBlockAloneAbility() {
+        super(Zone.BATTLEFIELD, null);
+    }
+
+    @Override
+    public String getRule() {
+        return "Can't block alone";
+    }
+
+    @Override
+    public CantBlockAloneAbility copy() {
+        return fINSTANCE;
+    }
+
+}

Mage/src/mage/game/combat/Combat.java

@@ -30,6 +30,7 @@ package mage.game.combat;
 
 import mage.Constants.Outcome;
 import mage.abilities.effects.RequirementEffect;
+import mage.abilities.keyword.CantAttackAloneAbility;
 import mage.abilities.keyword.VigilanceAbility;
 import mage.filter.common.FilterCreatureForCombat;
 import mage.filter.common.FilterPlaneswalkerPermanent;
@@ -128,6 +129,7 @@ public class Combat implements Serializable, Copyable<Combat> {
             player.selectAttackers(game, attackerId);
             if (game.isPaused() || game.isGameOver())
                 return;
+            checkAttackRestrictions(player, game);
             resumeSelectAttackers(game);
         }
     }
@@ -167,6 +169,28 @@ public class Combat implements Serializable, Copyable<Combat> {
         }
     }
 
+    protected void checkAttackRestrictions(Player player, Game game) {
+        int count = 0;
+        for (CombatGroup group: groups) {
+            count += group.getAttackers().size();
+        }
+        if (count == 1) {
+            for (CombatGroup group: groups) {
+                List<UUID> tobeRemoved = new ArrayList<UUID>();
+                for (UUID attackerId: group.getAttackers()) {
+                    Permanent attacker = game.getPermanent(attackerId);
+                    if (attacker != null && attacker.getAbilities().containsKey(CantAttackAloneAbility.getInstance().getId())) {
+                        game.informPlayers(attacker.getName() + " can't attack alone. Removing it from combat.");
+                        tobeRemoved.add(attackerId);
+                    }
+                }
+                for (UUID attackerId : tobeRemoved) {
+                    group.remove(attackerId);
+                }
+            }
+        }
+    }
+
     public void selectBlockers(Game game) {
         if (!game.replaceEvent(GameEvent.getEvent(GameEvent.EventType.DECLARING_BLOCKERS, attackerId, attackerId))) {
             Player player = game.getPlayer(attackerId);
@@ -176,11 +200,28 @@ public class Combat implements Serializable, Copyable<Combat> {
                 game.getPlayer(defenderId).selectBlockers(game, defenderId);
                 if (game.isPaused() || game.isGameOver())
                     return;
+                checkBlockRestrictions(game.getPlayer(defenderId), game);
                 game.fireEvent(GameEvent.getEvent(GameEvent.EventType.DECLARED_BLOCKERS, defenderId, defenderId));
             }
         }
     }
 
+    public void checkBlockRestrictions(Player player, Game game) {
+        int count = 0;
+        for (CombatGroup group: groups) {
+            count += group.getBlockers().size();
+        }
+        for (CombatGroup group : groups) {
+            group.checkBlockRestrictions(game, count);
+        }
+    }
+
+    public void acceptBlockers(Game game) {
+        for (CombatGroup group : groups) {
+            group.acceptBlockers(game);
+        }
+    }
+
     public void resumeSelectBlockers(Game game) {
         //TODO: this isn't quite right - but will work fine for two-player games
         for (UUID defenderId : getPlayerDefenders(game)) {
@@ -206,12 +247,6 @@ public class Combat implements Serializable, Copyable<Combat> {
         }
     }
 
-    public void checkBlockRestrictions(Game game) {
-        for (CombatGroup group : groups) {
-            group.checkBlockRestrictions(game);
-        }
-    }
-
     public void setDefenders(Game game) {
         Set<UUID> opponents = game.getOpponents(attackerId);
         PlayerList players;

Mage/src/mage/game/combat/CombatGroup.java

@@ -30,10 +30,7 @@ package mage.game.combat;
 
 import mage.Constants.Outcome;
 import mage.abilities.common.DamageAsThoughNotBlockedAbility;
-import mage.abilities.keyword.DeathtouchAbility;
-import mage.abilities.keyword.DoubleStrikeAbility;
-import mage.abilities.keyword.FirstStrikeAbility;
-import mage.abilities.keyword.TrampleAbility;
+import mage.abilities.keyword.*;
 import mage.game.Game;
 import mage.game.events.GameEvent;
 import mage.game.permanent.Permanent;
@@ -492,10 +489,42 @@ public class CombatGroup implements Serializable, Copyable<CombatGroup> {
         }
     }
 
-    public void checkBlockRestrictions(Game game) {
+    public void acceptBlockers(Game game) {
         if (attackers.isEmpty()) {
             return;
         }
+        for (UUID blockerId : blockers) {
+            for (UUID attackerId: attackers) {
+                game.fireEvent(GameEvent.getEvent(GameEvent.EventType.BLOCKER_DECLARED, attackerId, blockerId, players.get(blockerId)));
+            }
+        }
+        if(!blockers.isEmpty()) {
+            for (UUID attackerId: attackers) {
+                game.fireEvent(GameEvent.getEvent(GameEvent.EventType.CREATURE_BLOCKED, attackerId, null));
+            }
+        }
+    }
+
+    public void checkBlockRestrictions(Game game, int blockersCount) {
+        if (attackers.isEmpty()) {
+            return;
+        }
+        if (blockersCount == 1) {
+            List<UUID> toBeRemoved = new ArrayList<UUID>();
+            for (UUID blockerId: getBlockers()) {
+                Permanent blocker = game.getPermanent(blockerId);
+                if (blocker != null && blocker.getAbilities().containsKey(CantBlockAloneAbility.getInstance().getId())) {
+                    game.informPlayers(blocker.getName() + " can't block alone. Removing it from combat.");
+                    toBeRemoved.add(blockerId);
+                }
+            }
+            for (UUID blockerId : toBeRemoved) {
+                remove(blockerId);
+            }
+            if (blockers.size() == 0) {
+                this.blocked = false;
+            }
+        }
         for (UUID uuid : attackers) {
             Permanent attacker = game.getPermanent(uuid);
             if (attacker != null && this.blocked && attacker.getMinBlockedBy() > 1 && blockers.size() > 0 && blockers.size() < attacker.getMinBlockedBy()) {
@@ -512,16 +541,6 @@ public class CombatGroup implements Serializable, Copyable<CombatGroup> {
                 return;
             }
         }
-        for (UUID blockerId : blockers) {
-            for (UUID attackerId: attackers) {
-                game.fireEvent(GameEvent.getEvent(GameEvent.EventType.BLOCKER_DECLARED, attackerId, blockerId, players.get(blockerId)));
-            }
-        }
-        if(!blockers.isEmpty()) {
-            for (UUID attackerId: attackers) {
-                game.fireEvent(GameEvent.getEvent(GameEvent.EventType.CREATURE_BLOCKED, attackerId, null));
-            }
-        }
     }
 
     @Override

Mage/src/mage/game/turn/DeclareBlockersStep.java

@@ -28,11 +28,12 @@
 
 package mage.game.turn;
 
-import java.util.UUID;
 import mage.Constants.PhaseStep;
 import mage.game.Game;
 import mage.game.events.GameEvent.EventType;
 
+import java.util.UUID;
+
 /**
  *
  * @author BetaSteward_at_googlemail.com
@@ -62,7 +63,7 @@ public class DeclareBlockersStep extends Step<DeclareBlockersStep> {
         super.beginStep(game, activePlayerId);
         game.getCombat().selectBlockers(game);
         if (!game.isPaused()) {
-            game.getCombat().checkBlockRestrictions(game);
+            game.getCombat().acceptBlockers(game);
             game.getCombat().damageAssignmentOrder(game);
         }
     }
@@ -71,7 +72,7 @@ public class DeclareBlockersStep extends Step<DeclareBlockersStep> {
     public void resumeBeginStep(Game game, UUID activePlayerId) {
         super.resumeBeginStep(game, activePlayerId);
         game.getCombat().resumeSelectBlockers(game);
-        game.getCombat().checkBlockRestrictions(game);
+        game.getCombat().acceptBlockers(game);
         game.getCombat().damageAssignmentOrder(game);
     }