website/pkg/utility/time.go

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package utility
import (
"fmt"
"strconv"
"strings"
"time"
)
// NextMonth takes an input time (usually time.Now) and will return the next month on the given day.
//
// Example, NextMonth from any time in April should return e.g. May 10th.
func NextMonth(now time.Time, day int) time.Time {
var (
year, month, _ = now.Date()
nextMonth = month + 1
)
if nextMonth > 12 {
nextMonth = 1
year++
}
return time.Date(year, nextMonth, day, 0, 0, 0, 0, now.Location())
}
// FormatDurationCoarse returns a pretty printed duration with coarse granularity.
func FormatDurationCoarse(duration time.Duration) string {
// Negative durations (e.g. future dates) should work too.
if duration < 0 {
duration *= -1
}
var result = func(text string, v int64) string {
if v == 1 {
text = strings.TrimSuffix(text, "s")
}
return fmt.Sprintf(text, v)
}
if duration.Seconds() < 60.0 {
return result("%d seconds", int64(duration.Seconds()))
}
if duration.Minutes() < 60.0 {
return result("%d minutes", int64(duration.Minutes()))
}
if duration.Hours() < 24.0 {
return result("%d hours", int64(duration.Hours()))
}
days := int64(duration.Hours() / 24)
if days < 30 {
return result("%d days", days)
}
months := int64(days / 30)
if months < 12 {
return result("%d months", months)
}
// Over one year: start to show it as a floating point number of years (e.g. "1.2 years")
years := float64(days) / 365
s := strconv.FormatFloat(years, 'f', 1, 64)
if strings.HasSuffix(s, ".0") {
y, _ := strconv.Atoi(strings.Split(s, ".")[0])
return result("%d years", int64(y))
}
return fmt.Sprintf("%s years", s)
}