Added common method for secondary skill availability checks

client/windows/GUIClasses.cpp

@@ -1700,9 +1700,7 @@ int CUniversityWindow::CItem::state()
 {
 	if(parent->hero->getSecSkillLevel(SecondarySkill(ID)))//hero know this skill
 		return 1;
-	if(!parent->hero->canLearnSkill())//can't learn more skills
-		return 0;
-	if(parent->hero->type->heroClass->secSkillProbability[ID]==0)//can't learn this skill (like necromancy for most of non-necros)
+	if(!parent->hero->canLearnSkill(SecondarySkill(ID)))//can't learn more skills
 		return 0;
 	return 2;
 }

lib/mapObjects/CGHeroInstance.cpp

@@ -195,6 +195,23 @@ bool CGHeroInstance::canLearnSkill() const
 	return secSkills.size() < GameConstants::SKILL_PER_HERO;
 }
 
+bool CGHeroInstance::canLearnSkill(SecondarySkill which) const
+{
+	if ( !canLearnSkill())
+		return false;
+
+	if (!cb->isAllowed(2, which))
+		return false;
+
+	if (getSecSkillLevel(which) > 0)
+		return false;
+
+	if (type->heroClass->secSkillProbability[which] == 0)
+		return false;
+
+	return true;
+}
+
 int CGHeroInstance::maxMovePoints(bool onLand) const
 {
 	TurnInfo ti(this);
@@ -1117,9 +1134,7 @@ std::vector<SecondarySkill> CGHeroInstance::getLevelUpProposedSecondarySkills()
 	std::vector<SecondarySkill> obligatorySkills; //hero is offered magic school or wisdom if possible
 	if (!skillsInfo.wisdomCounter)
 	{
-		if (cb->isAllowed(2, SecondarySkill::WISDOM) &&
-				!getSecSkillLevel(SecondarySkill::WISDOM) &&
-				type->heroClass->secSkillProbability[SecondarySkill::WISDOM] > 0)
+		if (canLearnSkill(SecondarySkill::WISDOM))
 			obligatorySkills.push_back(SecondarySkill::WISDOM);
 	}
 	if (!skillsInfo.magicSchoolCounter)
@@ -1133,7 +1148,7 @@ std::vector<SecondarySkill> CGHeroInstance::getLevelUpProposedSecondarySkills()
 
 		for (auto skill : ss)
 		{
-			if (cb->isAllowed(2, skill) && !getSecSkillLevel(skill) && type->heroClass->secSkillProbability[skill] > 0) //only schools hero doesn't know yet
+			if (canLearnSkill(skill)) //only schools hero doesn't know yet
 			{
 				obligatorySkills.push_back(skill);
 				break; //only one
@@ -1145,7 +1160,7 @@ std::vector<SecondarySkill> CGHeroInstance::getLevelUpProposedSecondarySkills()
 	//picking sec. skills for choice
 	std::set<SecondarySkill> basicAndAdv, expert, none;
 	for(int i = 0; i < VLC->skillh->size(); i++)
-		if (cb->isAllowed(2,i) && type->heroClass->secSkillProbability[i] > 0)
+		if (canLearnSkill(SecondarySkill(i)))
 			none.insert(SecondarySkill(i));
 
 	for(auto & elem : secSkills)

lib/mapObjects/CGHeroInstance.h

@@ -187,6 +187,7 @@ public:
 
 	/// Returns true if hero has free secondary skill slot.
 	bool canLearnSkill() const;
+	bool canLearnSkill(SecondarySkill which) const;
 
 	void setPrimarySkill(PrimarySkill::PrimarySkill primarySkill, si64 value, ui8 abs);
 	void setSecSkillLevel(SecondarySkill which, int val, bool abs);// abs == 0 - changes by value; 1 - sets to value

server/CGameHandler.cpp

@@ -4083,7 +4083,7 @@ bool CGameHandler::buySecSkill(const IMarket *m, const CGHeroInstance *h, Second
 	if (!h->canLearnSkill())
 		COMPLAIN_RET("Hero can't learn any more skills");
 
-	if (h->type->heroClass->secSkillProbability.at(skill)==0)//can't learn this skill (like necromancy for most of non-necros)
+	if (!h->canLearnSkill(skill))
 		COMPLAIN_RET("The hero can't learn this skill!");
 
 	if (!vstd::contains(m->availableItemsIds(EMarketMode::RESOURCE_SKILL), skill))