// NOTE: Course level tracking 
// assumes TrackingData exists
// currently, this means that SCO Level = Course
function fbCourseFinished()
{
	var aTD = TrackingData;
	for ( sSCO_ID in aTD )
	{
		if ( aTD[ sSCO_ID ]["Status"] != "passed"
			&& aTD[ sSCO_ID ]["Status"] != "failed"
			&& aTD[ sSCO_ID ]["Status"] != "completed" )
		{
			return false;
		}
	}
	
	return true;
}
// inline comments describe method of determining status
function fsGetCourseStatus()
{
	var aTD = TrackingData;
	
	// if any SCO was failed, the course is considered failed
	for ( sSCO_ID in aTD )
	{
		if ( aTD[ sSCO_ID ]["Status"] == "failed" )
			return "failed";
	}
	
	// if no SCO was failed, but one or more elements are incomplete, the course is considered incomplete
	if ( !fbCourseFinished() )
		return "incomplete";
	
	// if every SCO is completed and none are failed, then the course is considered passed if the course is for credit
	// and completed if it is not for credit
	if ( fsGetCourseCredit() == "credit" )
		return "passed";
	else
		return "completed";
}
// the course score is equal to the average of the scores of all SCOs that are for credit
function fsGetCourseScore()
{
	var aTD = TrackingData;
	var nScore = 0;
	var nNumCreditSCOs = 0;
	
	for ( sSCO_ID in aTD )
	{
		if ( aTD[ sSCO_ID ]["Credit"] == "credit" )
		{
			nScore += Number( aTD[ sSCO_ID ]["Score"] );
			nNumCreditSCOs++;
		}
	}
	
	if ( nNumCreditSCOs > 0 )
		nScore = Math.floor( nScore / nNumCreditSCOs );
	
	return nScore;
}
// if any SCO is for credit, the course is for credit, otherwise the course is no-credit
function fsGetCourseCredit()
{
	var aTD = TrackingData;
	for ( sSCO_ID in aTD )
		if ( aTD[ sSCO_ID ]["Credit"] == "credit" )
			return "credit";
	
	return "no-credit";
}