get rid of CPlayerBattleCallback::battleCanCastSpell

AI/BattleAI/BattleAI.cpp

@@ -186,7 +186,7 @@ void CBattleAI::attemptCastingSpell()
 	if(!hero)
 		return;
 
-	if(!cb->battleCanCastSpell())
+	if(cb->battleCanCastSpell(hero, ECastingMode::HERO_CASTING) != ESpellCastProblem::OK)
 		return;
 
 	LOGL("Casting spells sounds like fun. Let's see...");

client/battle/CBattleInterface.cpp

@@ -871,19 +871,24 @@ void CBattleInterface::bSpellf()
 	if (spellDestSelectMode) //we are casting a spell
 		return;
 
-	CCS->curh->changeGraphic(ECursor::ADVENTURE,0);
-
 	if (!myTurn)
 		return;
 
 	auto myHero = currentHero();
-	ESpellCastProblem::ESpellCastProblem spellCastProblem;
-	if (curInt->cb->battleCanCastSpell(&spellCastProblem))
+	if(!myHero)
+		return;
+
+	CCS->curh->changeGraphic(ECursor::ADVENTURE,0);
+
+	ESpellCastProblem::ESpellCastProblem spellCastProblem = curInt->cb->battleCanCastSpell(myHero, ECastingMode::HERO_CASTING);
+
+	if(spellCastProblem == ESpellCastProblem::OK)
 	{
 		GH.pushInt(new CSpellWindow(myHero, curInt.get()));
 	}
 	else if (spellCastProblem == ESpellCastProblem::MAGIC_IS_BLOCKED)
 	{
+		//TODO: move to spell mechanics, add more information to spell cast problem
 		//Handle Orb of Inhibition-like effects -> we want to display dialog with info, why casting is impossible
 		auto blockingBonus = currentHero()->getBonusLocalFirst(Selector::type(Bonus::BLOCK_ALL_MAGIC));
 		if (!blockingBonus)
@@ -1849,11 +1854,17 @@ void CBattleInterface::showQueue()
 
 void CBattleInterface::blockUI(bool on)
 {
-	ESpellCastProblem::ESpellCastProblem spellcastingProblem;
-	bool canCastSpells = curInt->cb->battleCanCastSpell(&spellcastingProblem);
-	//if magic is blocked, we leave button active, so the message can be displayed (cf bug #97)
-	if (!canCastSpells)
-		canCastSpells = spellcastingProblem == ESpellCastProblem::MAGIC_IS_BLOCKED;
+	bool canCastSpells = false;
+	auto hero = curInt->cb->battleGetMyHero();
+
+	if(hero)
+	{
+		ESpellCastProblem::ESpellCastProblem spellcastingProblem = curInt->cb->battleCanCastSpell(hero, ECastingMode::HERO_CASTING);
+
+		//if magic is blocked, we leave button active, so the message can be displayed after button click
+		canCastSpells = spellcastingProblem == ESpellCastProblem::OK || spellcastingProblem == ESpellCastProblem::MAGIC_IS_BLOCKED;
+	}
+
 	bool canWait = activeStack ? !activeStack->waited() : false;
 
 	bOptions->block(on);

client/battle/CBattleInterfaceClasses.cpp

@@ -191,7 +191,7 @@ void CBattleHero::clickLeft(tribool down, bool previousState)
 	if(myOwner->spellDestSelectMode) //we are casting a spell
 		return;
 
-	if(myHero != nullptr && !down &&  myOwner->myTurn && myOwner->getCurrentPlayerInterface()->cb->battleCanCastSpell()) //check conditions
+	if(myHero != nullptr && !down &&  myOwner->myTurn && myOwner->getCurrentPlayerInterface()->cb->battleCanCastSpell(myHero, ECastingMode::HERO_CASTING) == ESpellCastProblem::OK) //check conditions
 	{
 		for(int it=0; it<GameConstants::BFIELD_SIZE; ++it) //do nothing when any hex is hovered - hero's animation overlaps battlefield
 		{

client/windows/CSpellWindow.cpp

@@ -547,7 +547,7 @@ void CSpellWindow::SpellArea::clickLeft(tribool down, bool previousState)
 		}
 
 		//we will cast a spell
-		if(mySpell->combatSpell && owner->myInt->battleInt && owner->myInt->cb->battleCanCastSpell()) //if battle window is open
+		if(mySpell->combatSpell && owner->myInt->battleInt) //if battle window is open
 		{
 			ESpellCastProblem::ESpellCastProblem problem = owner->myInt->cb->battleCanCastThisSpell(mySpell);
 			switch (problem)

lib/CBattleCallback.cpp

@@ -2153,26 +2153,6 @@ int CPlayerBattleCallback::battleGetSurrenderCost() const
 	return CBattleInfoCallback::battleGetSurrenderCost(*player);
 }
 
-bool CPlayerBattleCallback::battleCanCastSpell(ESpellCastProblem::ESpellCastProblem *outProblem /*= nullptr*/) const
-{
-	RETURN_IF_NOT_BATTLE(false);
-	ASSERT_IF_CALLED_WITH_PLAYER
-
-	const CGHeroInstance * hero = battleGetMyHero();
-	if(!hero)
-	{
-		if(outProblem)
-			*outProblem = ESpellCastProblem::NO_HERO_TO_CAST_SPELL;
-		return false;
-	}
-
-	auto problem = CBattleInfoCallback::battleCanCastSpell(hero, ECastingMode::HERO_CASTING);
-	if(outProblem)
-		*outProblem = problem;
-
-	return problem == ESpellCastProblem::OK;
-}
-
 const CGHeroInstance * CPlayerBattleCallback::battleGetMyHero() const
 {
 	return CBattleInfoEssentials::battleGetFightingHero(battleGetMySide());

lib/CBattleCallback.h

@@ -340,7 +340,6 @@ public:
 
 	int battleGetSurrenderCost() const; //returns cost of surrendering battle, -1 if surrendering is not possible
 
-	bool battleCanCastSpell(ESpellCastProblem::ESpellCastProblem *outProblem = nullptr) const; //returns true, if caller can cast a spell. If not, if pointer is given via arg, the reason will be written.
 	const CGHeroInstance * battleGetMyHero() const;
 	InfoAboutHero battleGetEnemyHero() const;
 };