/// <summary>
/// helper for calculating average pace that is safe when input is null
/// </summary>
/// <param name="activities">collection of activities</param>
/// <returns></returns>
private string _averagePace(IEnumerable <HalbotActivity> activities)
{
try
{
return($"{HalbotActivity.PaceForSpeed(activities.Average(d => d.Speed))}m/km");
}
catch (Exception)
{
//unable to return an average, return hyphen
return("-");
}
}
private ColumnChart GetLastMonthPace(int x)
{
if (x > Activities.Count)
{
x = Activities.Count;
}
ColumnChart chart = new ColumnChart("monthpace", 200);
var months = Activities.OrderByDescending(run => run.Date).GroupBy(run => new { run.Date.Year, run.Date.Month }).Take(x).Reverse().ToList();
ColumnChart.DataSet pace = new ColumnChart.DataSet("pace");
foreach (var month in months)
{
double avg_speed = month.Average <HalbotActivity>(run => run.Speed);
pace.Add(month.First <HalbotActivity>().Date.ToString("MMM"), $"{HalbotActivity.PaceForSpeed(avg_speed)}", avg_speed * avg_speed * avg_speed * avg_speed);
}
chart.AddDataSet(pace);
return(chart);
}
private ColumnChart GetLastWeekPace(int x)
{
if (x > Activities.Count)
{
x = Activities.Count;
}
ColumnChart chart = new ColumnChart("weekpace", 200);
var weeks = Activities.OrderByDescending(run => run.Date).GroupBy(run => new { run.Date.Year, run.Week }).Take(x).Reverse().ToList();
ColumnChart.DataSet pace = new ColumnChart.DataSet("pace");
foreach (var week in weeks)
{
double avg_speed = week.Average <HalbotActivity>(run => run.Speed);
pace.Add(week.First <HalbotActivity>().Week.ToString(), $"{HalbotActivity.PaceForSpeed(avg_speed)}", avg_speed * avg_speed * avg_speed * avg_speed);
}
chart.AddDataSet(pace);
return(chart);
}