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vendor/github.com/flosch/go-humanize/times.go

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