/// <summary>
/// Return the datasets with all data points quantized according to the time scale.
/// </summary>
/// <remarks>
/// Quantizing the data points in this way will substantially improve the performance of Chart.js for large data sets.
/// </remarks>
private List <ChartJsTimeSeriesDataset> GetTimescaleDatasets()
{
var quantizedDatasets = new List <ChartJsTimeSeriesDataset>();
foreach (var dataset in this.Datasets)
{
var datapoints = dataset.DataPoints;
var datasetQuantized = new ChartJsTimeSeriesDataset();
datasetQuantized.Name = dataset.Name;
datasetQuantized.BorderColor = dataset.BorderColor;
datasetQuantized.FillColor = dataset.FillColor;
if (this.TimeScale == ChartJsTimeSeriesTimeScaleSpecifier.Month)
{
var quantizedDataPoints = datapoints
.GroupBy(x => new { Month = new DateTime(x.DateTime.Year, x.DateTime.Month, 1) })
.Select(x => new ChartJsTimeSeriesDataPoint
{
DateTime = x.Key.Month,
Value = x.Sum(y => y.Value)
})
.OrderBy(x => x.DateTime)
.ToList();
datasetQuantized.DataPoints = quantizedDataPoints.Cast <IChartJsTimeSeriesDataPoint>().ToList();
}
else if (this.TimeScale == ChartJsTimeSeriesTimeScaleSpecifier.Year)
{
var quantizedDataPoints = datapoints
.GroupBy(x => new { Year = new DateTime(x.DateTime.Year, 1, 1) })
.Select(x => new ChartJsTimeSeriesDataPoint
{
DateTime = x.Key.Year,
Value = x.Sum(y => y.Value)
})
.OrderBy(x => x.DateTime)
.ToList();
datasetQuantized.DataPoints = quantizedDataPoints.Cast <IChartJsTimeSeriesDataPoint>().ToList();
}
else
{
throw new NotImplementedException("Timescale is not implemented");
}
quantizedDatasets.Add(datasetQuantized);
}
return(quantizedDatasets);
}
/// <summary>
/// Gets a configured factory that creates the data required for the chart.
/// </summary>
/// <param name="summary">The summary.</param>
/// <returns></returns>
/// <exception cref="NotImplementedException"></exception>
private ChartJsTimeSeriesDataFactory <ChartJsTimeSeriesDataPoint> GetChartJsFactory(List <SummaryInfo> summary, TimePeriod timePeriod)
{
var dateRange = timePeriod.GetDateRange();
ChartJsTimeSeriesTimeScaleSpecifier chartTimeScale = timePeriod.TimeUnit == TimePeriodUnitSpecifier.Year ? ChartJsTimeSeriesTimeScaleSpecifier.Month : ChartJsTimeSeriesTimeScaleSpecifier.Day;
var factory = new ChartJsTimeSeriesDataFactory <ChartJsTimeSeriesDataPoint>();
factory.TimeScale = chartTimeScale;
factory.StartDateTime = dateRange.Start;
factory.EndDateTime = dateRange.End;
factory.ChartStyle = ChartJsTimeSeriesChartStyleSpecifier.Line;
factory.ChartColors = new List <string> {
"#2ECC71", "#3498DB"
};
var viewsSummary = summary.Where(m => m.DatasetName == VIEWS_DATASET_NAME);
var completionSummary = summary.Where(m => m.DatasetName == COMPLETIONS_DATASET_NAME);
var viewedDataset = new ChartJsTimeSeriesDataset();
viewedDataset.Name = VIEWS_DATASET_NAME;
viewedDataset.DataPoints = viewsSummary
.Select(m => new ChartJsTimeSeriesDataPoint {
DateTime = m.InterationDateTime, Value = m.value
})
.Cast <IChartJsTimeSeriesDataPoint>()
.ToList();
var completionDataset = new ChartJsTimeSeriesDataset();
completionDataset.Name = COMPLETIONS_DATASET_NAME;
completionDataset.DataPoints = completionSummary
.Select(m => new ChartJsTimeSeriesDataPoint {
DateTime = m.InterationDateTime, Value = m.value
})
.Cast <IChartJsTimeSeriesDataPoint>()
.ToList();
factory.Datasets.Add(completionDataset);
factory.Datasets.Add(viewedDataset);
return(factory);
}
