435c0d9fc8
This PR switches the Nomad repository from using govendor to Go modules for managing dependencies. Aspects of the Nomad workflow remain pretty much the same. The usual Makefile targets should continue to work as they always did. The API submodule simply defers to the parent Nomad version on the repository, keeping the semantics of API versioning that currently exists.
118 lines
3.2 KiB
Go
118 lines
3.2 KiB
Go
package humanize
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
"sort"
|
|
"time"
|
|
)
|
|
|
|
// Seconds-based time units
|
|
const (
|
|
Day = 24 * time.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 {
|
|
return RelTime(then, time.Now(), "ago", "from now")
|
|
}
|
|
|
|
// A RelTimeMagnitude struct contains a relative time point at which
|
|
// the relative format of time will switch to a new format string. A
|
|
// slice of these in ascending order by their "D" field is passed to
|
|
// CustomRelTime to format durations.
|
|
//
|
|
// The Format field is a string that may contain a "%s" which will be
|
|
// replaced with the appropriate signed label (e.g. "ago" or "from
|
|
// now") and a "%d" that will be replaced by the quantity.
|
|
//
|
|
// The DivBy field is the amount of time the time difference must be
|
|
// divided by in order to display correctly.
|
|
//
|
|
// e.g. if D is 2*time.Minute and you want to display "%d minutes %s"
|
|
// DivBy should be time.Minute so whatever the duration is will be
|
|
// expressed in minutes.
|
|
type RelTimeMagnitude struct {
|
|
D time.Duration
|
|
Format string
|
|
DivBy time.Duration
|
|
}
|
|
|
|
var defaultMagnitudes = []RelTimeMagnitude{
|
|
{time.Second, "now", time.Second},
|
|
{2 * time.Second, "1 second %s", 1},
|
|
{time.Minute, "%d seconds %s", time.Second},
|
|
{2 * time.Minute, "1 minute %s", 1},
|
|
{time.Hour, "%d minutes %s", time.Minute},
|
|
{2 * time.Hour, "1 hour %s", 1},
|
|
{Day, "%d hours %s", time.Hour},
|
|
{2 * Day, "1 day %s", 1},
|
|
{Week, "%d days %s", Day},
|
|
{2 * Week, "1 week %s", 1},
|
|
{Month, "%d weeks %s", Week},
|
|
{2 * Month, "1 month %s", 1},
|
|
{Year, "%d months %s", Month},
|
|
{18 * Month, "1 year %s", 1},
|
|
{2 * Year, "2 years %s", 1},
|
|
{LongTime, "%d years %s", Year},
|
|
{math.MaxInt64, "a long while %s", 1},
|
|
}
|
|
|
|
// RelTime formats a time into a relative string.
|
|
//
|
|
// It takes two times and two labels. In addition to the generic time
|
|
// delta string (e.g. 5 minutes), the labels are used applied so that
|
|
// the label corresponding to the smaller time is applied.
|
|
//
|
|
// RelTime(timeInPast, timeInFuture, "earlier", "later") -> "3 weeks earlier"
|
|
func RelTime(a, b time.Time, albl, blbl string) string {
|
|
return CustomRelTime(a, b, albl, blbl, defaultMagnitudes)
|
|
}
|
|
|
|
// CustomRelTime formats a time into a relative string.
|
|
//
|
|
// It takes two times two labels and a table of relative time formats.
|
|
// In addition to the generic time delta string (e.g. 5 minutes), the
|
|
// labels are used applied so that the label corresponding to the
|
|
// smaller time is applied.
|
|
func CustomRelTime(a, b time.Time, albl, blbl string, magnitudes []RelTimeMagnitude) string {
|
|
lbl := albl
|
|
diff := b.Sub(a)
|
|
|
|
if a.After(b) {
|
|
lbl = blbl
|
|
diff = a.Sub(b)
|
|
}
|
|
|
|
n := sort.Search(len(magnitudes), func(i int) bool {
|
|
return magnitudes[i].D > diff
|
|
})
|
|
|
|
if n >= len(magnitudes) {
|
|
n = len(magnitudes) - 1
|
|
}
|
|
mag := magnitudes[n]
|
|
args := []interface{}{}
|
|
escaped := false
|
|
for _, ch := range mag.Format {
|
|
if escaped {
|
|
switch ch {
|
|
case 's':
|
|
args = append(args, lbl)
|
|
case 'd':
|
|
args = append(args, diff/mag.DivBy)
|
|
}
|
|
escaped = false
|
|
} else {
|
|
escaped = ch == '%'
|
|
}
|
|
}
|
|
return fmt.Sprintf(mag.Format, args...)
|
|
}
|