33 lines
1.2 KiB
Go
33 lines
1.2 KiB
Go
package dateutil
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import "time"
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// Floor - takes a datetime and return a datetime from the same day at 00:00:00 (UTC).
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func Floor(t time.Time) time.Time {
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return t.UTC().Truncate(time.Hour * 24)
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}
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// Ceil - takes a datetime and return a datetime from the same day at 23:59:59 (UTC).
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func Ceil(t time.Time) time.Time {
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// add 24 hours so that we are dealing with tomorrow's datetime
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// Floor
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// Substract one second and we have today at 23:59:59
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return Floor(t.Add(time.Hour * 24)).Add(time.Second * -1)
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}
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func BeforeOrEqual(milestone time.Time, date time.Time) bool {
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return date.UTC().Before(milestone) || date.UTC().Equal(milestone)
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}
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func AfterOrEqual(milestone time.Time, date time.Time) bool {
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return date.UTC().After(milestone) || date.UTC().Equal(milestone)
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}
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// Overlap - returns true if two date intervals overlap.
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func Overlap(start1 time.Time, end1 time.Time, start2 time.Time, end2 time.Time) bool {
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return (AfterOrEqual(start2, start1) && BeforeOrEqual(end2, start1)) ||
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(AfterOrEqual(start2, end1) && BeforeOrEqual(end2, end1)) ||
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(AfterOrEqual(start1, start2) && BeforeOrEqual(end1, start2)) ||
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(AfterOrEqual(start1, end2) && BeforeOrEqual(end1, end2))
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}
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