add getbestgrades for a song inside profile

more or less copy pasta'd musicwheel code for grade display, can likely be optimized

added to unbreak grade sorting at music wheel

uses new scoreman stuff obv

Author: MinaciousGrace

src/Profile.cpp

@@ -472,6 +472,39 @@ void Profile::IncrementStepsPlayCount( const Song* pSong, const Steps* pSteps )
 	GetStepsHighScoreList(pSong,pSteps).IncrementPlayCount( now );
 }
 
+Grade Profile::GetBestGrade(const Song* pSong, StepsType st) const
+{
+	Grade gradeBest = Grade_Invalid;
+	if (pSong != nullptr) {
+		bool hasCurrentStyleSteps = false;
+		FOREACH_ENUM_N(Difficulty, 6, i) {
+			Steps* pSteps = SongUtil::GetStepsByDifficulty(pSong, st, i);
+			if (pSteps != NULL) {
+				hasCurrentStyleSteps = true;
+				Grade dcg = SCOREMAN->GetBestGradeFor(pSteps->GetChartKey());
+				if (gradeBest >= dcg) {
+					gradeBest = dcg;
+				}
+			}
+		}
+		//If no grade was found for the current style/stepstype
+		if (!hasCurrentStyleSteps) {
+			//Get the best grade among all steps
+			auto& allSteps = pSong->GetAllSteps();
+			for (auto& stepsPtr : allSteps) {
+				if (stepsPtr->m_StepsType == st) //Skip already checked steps of type st
+					continue;
+				Grade dcg = SCOREMAN->GetBestGradeFor(stepsPtr->GetChartKey());
+				if (gradeBest >= dcg) {
+					gradeBest = dcg;
+				}
+			}
+		}
+	}
+
+	return gradeBest;
+}
+
 void Profile::GetGrades( const Song* pSong, StepsType st, int iCounts[NUM_Grade] ) const
 {
 	SongID songID;

src/Profile.h

@@ -298,6 +298,7 @@ class Profile
 	HighScoreList& GetStepsHighScoreList( const Song* pSong, const Steps* pSteps );
 	int GetStepsNumTimesPlayed( const Song* pSong, const Steps* pSteps ) const;
 	void IncrementStepsPlayCount( const Song* pSong, const Steps* pSteps );
+	Grade GetBestGrade(const Song * pSong, StepsType st) const;
 	void GetGrades( const Song* pSong, StepsType st, int iCounts[NUM_Grade] ) const;
 	int GetSongNumTimesPlayed( const Song* pSong ) const;
 	int GetSongNumTimesPlayed( const SongID& songID ) const;