Erwan

- refactor of MTGRules.cpp (buyback/flashback/retrace/alternative).
This change has been reviewed by myself, Wil, and Mike. The test suite passes.
More cleanup can be done, I will work on that later on.

projects/mtg/include/MTGCardInstance.h

@@ -45,8 +45,7 @@ class MTGCardInstance: public CardPrimitive, public MTGCard, public Damageable {
   Pos* view;
   int X;
   int XX;
-  int boughtback;
-  int flashedback;
+  int alternateCostPaid[ManaCost::MANA_PAID_WITH_RETRACE + 1]; 
   int paymenttype;
   int frozen;
   int sunburst;

projects/mtg/include/MTGRules.h

@@ -8,6 +8,7 @@
 #include "Counters.h"
 #include "WEvent.h"
 #include "CardSelector.h"
+#include "ManaCost.h"
 
 class OtherAbilitiesEventReceiver: public MTGAbility
 {
@@ -37,7 +38,11 @@ class MTGAlternativeCostRule: public MTGAbility
 {
 public:
     int isReactingToClick(MTGCardInstance * card, ManaCost * mana = NULL);
+    int isReactingToClick(MTGCardInstance * card, ManaCost * mana, ManaCost *alternateManaCost);
+    
+    int reactToClick(MTGCardInstance * card, ManaCost * alternateManaCost, int paymentType = ManaCost::MANA_PAID);
     int reactToClick(MTGCardInstance * card);
+  
     int testDestroy();
     virtual ostream& toString(ostream& out) const;
     MTGAlternativeCostRule(int _id);
@@ -48,7 +53,7 @@ public:
     virtual MTGAlternativeCostRule * clone() const;
 };
 
-class MTGBuyBackRule: public MTGAbility
+class MTGBuyBackRule: public MTGAlternativeCostRule
 {
 public:
     int isReactingToClick(MTGCardInstance * card, ManaCost * mana = NULL);
@@ -63,7 +68,7 @@ public:
     virtual MTGBuyBackRule * clone() const;
 };
 
-class MTGFlashBackRule: public MTGAbility
+class MTGFlashBackRule: public MTGAlternativeCostRule
 {
 public:
     int isReactingToClick(MTGCardInstance * card, ManaCost * mana = NULL);
@@ -78,7 +83,7 @@ public:
     virtual MTGFlashBackRule * clone() const;
 };
 
-class MTGRetraceRule: public MTGAbility
+class MTGRetraceRule: public MTGAlternativeCostRule
 {
 public:
     int isReactingToClick(MTGCardInstance * card, ManaCost * mana = NULL);

projects/mtg/include/ManaCost.h

@@ -21,6 +21,7 @@ class ManaCost{
   
  public:
    enum{
+     MANA_UNPAID = 0,
      MANA_PAID = 1,
      MANA_PAID_WITH_KICKER = 2,
 	 MANA_PAID_WITH_ALTERNATIVE = 3,