/// <summary>
/// Get the list of successful login and the number of total session time in specific duration
/// Get average session duration by dividing the total session duration by number of successful login
/// return the dictionary that contains months and average session duration per month
/// </summary>
/// <returns></returns>
public IDictionary <string, double> GetAverageSessionDuration()
{
int numOfMonth = BusinessRuleConstants.GetAverageSessionDuration_NumOfMonth; // 6
int monthToday = DateTime.Today.Month;
int yearToday = DateTime.Today.Year;
IDictionary <string, double> monthAvgSessionDuration = new Dictionary <string, double>();
// Request the total session time for the number of months
// Flaw: request the data to the database for numOfMonth(6) times, it slows down the performance
for (int i = 0; i < numOfMonth; i++)
{
double avgSessionTime = _dashboardService.CountAverageSessionTime(monthToday, yearToday);
monthAvgSessionDuration.Add(dateFormatConverter[monthToday], avgSessionTime);
monthToday--;
if (monthToday == 0)
{
monthToday = 12; yearToday--;
}
}
return(monthAvgSessionDuration);
}
