storj/private/date/utils.go

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// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
// Package date contains various date-related utilities
package date
import "time"
// MonthBoundary extract month from the provided date and returns its edges.
func MonthBoundary(t time.Time) (time.Time, time.Time) {
startDate := time.Date(t.Year(), t.Month(), 1, 0, 0, 0, 0, t.Location())
endDate := time.Date(t.Year(), t.Month()+1, 1, 0, 0, 0, -1, t.Location())
return startDate, endDate
}
// DayBoundary returns start and end of the provided day.
func DayBoundary(t time.Time) (time.Time, time.Time) {
return time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, t.Location()),
time.Date(t.Year(), t.Month(), t.Day()+1, 0, 0, 0, -1, t.Location())
}
// PeriodToTime returns time.Time period in format YYYY-MM from string.
func PeriodToTime(period string) (_ time.Time, err error) {
layout := "2006-01"
shortPeriod := period[0:7]
result, err := time.Parse(layout, shortPeriod)
if err != nil {
return time.Time{}, err
}
return result, nil
}
// MonthsCountSince calculates the months between now and the createdAtTime time.Time value passed.
func MonthsCountSince(from time.Time) int {
return MonthsBetweenDates(from, time.Now())
}
// MonthsBetweenDates calculates amount of months between two dates.
func MonthsBetweenDates(from time.Time, to time.Time) int {
// we need UTC here before its the only sensible way to say what day it is
y1, M1, _ := from.UTC().Date()
y2, M2, _ := to.UTC().Date()
months := ((y2 - y1) * 12) + int(M2) - int(M1)
//note that according to the tests, we ignore days of the month
return months
}
// TruncateToHourInNano returns the time truncated to the hour in nanoseconds.
func TruncateToHourInNano(t time.Time) int64 {
return t.Truncate(1 * time.Hour).UnixNano()
}