package seq import ( "time" "git.gutmet.org/go-chart.git/util" ) // Time is a utility singleton with helper functions for time seq generation. var Time timeSequence type timeSequence struct{} // Days generates a seq of timestamps by day, from -days to today. func (ts timeSequence) Days(days int) []time.Time { var values []time.Time for day := days; day >= 0; day-- { values = append(values, time.Now().AddDate(0, 0, -day)) } return values } func (ts timeSequence) Hours(start time.Time, totalHours int) []time.Time { times := make([]time.Time, totalHours) last := start for i := 0; i < totalHours; i++ { times[i] = last last = last.Add(time.Hour) } return times } // HoursFilled adds zero values for the data bounded by the start and end of the xdata array. func (ts timeSequence) HoursFilled(xdata []time.Time, ydata []float64) ([]time.Time, []float64) { start, end := util.Time.StartAndEnd(xdata...) totalHours := util.Time.DiffHours(start, end) finalTimes := ts.Hours(start, totalHours+1) finalValues := make([]float64, totalHours+1) var hoursFromStart int for i, xd := range xdata { hoursFromStart = util.Time.DiffHours(start, xd) finalValues[hoursFromStart] = ydata[i] } return finalTimes, finalValues }