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87 lines
1.7 KiB
Go
87 lines
1.7 KiB
Go
package humanize
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import (
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"fmt"
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"time"
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)
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// Seconds-based time units
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const (
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Minute = 60
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Hour = 60 * Minute
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Day = 24 * Hour
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Week = 7 * Day
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Month = 30 * Day
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Year = 12 * Month
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LongTime = 37 * Year
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)
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// Time formats a time into a relative string.
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//
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// Time(someT) -> "3 weeks ago"
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func Time(then time.Time) string {
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diff := then.Sub(time.Now())
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return TimeDuration(diff)
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}
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func TimeDuration(diff time.Duration) string {
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diff /= time.Second
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lbl := "ago"
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after := diff > 0
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if after {
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lbl = "from now"
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diff += 1
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} else {
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diff *= -1
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}
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switch {
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case diff <= 0:
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return "now"
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case diff <= 2:
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return fmt.Sprintf("1 second %s", lbl)
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case diff < 1*Minute:
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return fmt.Sprintf("%d seconds %s", diff, lbl)
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case diff < 2*Minute:
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return fmt.Sprintf("1 minute %s", lbl)
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case diff < 1*Hour:
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return fmt.Sprintf("%d minutes %s", diff/Minute, lbl)
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case diff < 2*Hour:
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return fmt.Sprintf("1 hour %s", lbl)
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case diff < 1*Day:
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return fmt.Sprintf("%d hours %s", diff/Hour, lbl)
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case diff < 2*Day:
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return fmt.Sprintf("1 day %s", lbl)
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case diff < 1*Week:
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return fmt.Sprintf("%d days %s", diff/Day, lbl)
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case diff < 2*Week:
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return fmt.Sprintf("1 week %s", lbl)
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case diff < 1*Month:
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return fmt.Sprintf("%d weeks %s", diff/Week, lbl)
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case diff < 2*Month:
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return fmt.Sprintf("1 month %s", lbl)
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case diff < 1*Year:
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return fmt.Sprintf("%d months %s", diff/Month, lbl)
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case diff < 18*Month:
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return fmt.Sprintf("1 year %s", lbl)
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case diff < 2*Year:
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return fmt.Sprintf("2 years %s", lbl)
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case diff < LongTime:
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return fmt.Sprintf("%d years %s", diff/Year, lbl)
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}
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if after {
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return "a while from now"
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}
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return "long ago"
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}
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