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writefreely/appstats/appstats.go

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// Copyright 2014-2018 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style license that can be
// found in the LICENSE file of the Gogs project (github.com/gogs/gogs).
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package appstats
import (
"fmt"
"math"
"strings"
"time"
)
// Borrowed from github.com/gogs/gogs/pkg/tool
// Seconds-based time units
const (
Minute = 60
Hour = 60 * Minute
Day = 24 * Hour
Week = 7 * Day
Month = 30 * Day
Year = 12 * Month
)
func computeTimeDiff(diff int64) (int64, string) {
diffStr := ""
switch {
case diff <= 0:
diff = 0
diffStr = "now"
case diff < 2:
diff = 0
diffStr = "1 second"
case diff < 1*Minute:
diffStr = fmt.Sprintf("%d seconds", diff)
diff = 0
case diff < 2*Minute:
diff -= 1 * Minute
diffStr = "1 minute"
case diff < 1*Hour:
diffStr = fmt.Sprintf("%d minutes", diff/Minute)
diff -= diff / Minute * Minute
case diff < 2*Hour:
diff -= 1 * Hour
diffStr = "1 hour"
case diff < 1*Day:
diffStr = fmt.Sprintf("%d hours", diff/Hour)
diff -= diff / Hour * Hour
case diff < 2*Day:
diff -= 1 * Day
diffStr = "1 day"
case diff < 1*Week:
diffStr = fmt.Sprintf("%d days", diff/Day)
diff -= diff / Day * Day
case diff < 2*Week:
diff -= 1 * Week
diffStr = "1 week"
case diff < 1*Month:
diffStr = fmt.Sprintf("%d weeks", diff/Week)
diff -= diff / Week * Week
case diff < 2*Month:
diff -= 1 * Month
diffStr = "1 month"
case diff < 1*Year:
diffStr = fmt.Sprintf("%d months", diff/Month)
diff -= diff / Month * Month
case diff < 2*Year:
diff -= 1 * Year
diffStr = "1 year"
default:
diffStr = fmt.Sprintf("%d years", diff/Year)
diff = 0
}
return diff, diffStr
}
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// TimeSincePro calculates the time interval and generate full user-friendly string.
func TimeSincePro(then time.Time) string {
now := time.Now()
diff := now.Unix() - then.Unix()
if then.After(now) {
return "future"
}
var timeStr, diffStr string
for {
if diff == 0 {
break
}
diff, diffStr = computeTimeDiff(diff)
timeStr += ", " + diffStr
}
return strings.TrimPrefix(timeStr, ", ")
}
func logn(n, b float64) float64 {
return math.Log(n) / math.Log(b)
}
func humanateBytes(s uint64, base float64, sizes []string) string {
if s < 10 {
return fmt.Sprintf("%d B", s)
}
e := math.Floor(logn(float64(s), base))
suffix := sizes[int(e)]
val := float64(s) / math.Pow(base, math.Floor(e))
f := "%.0f"
if val < 10 {
f = "%.1f"
}
return fmt.Sprintf(f+" %s", val, suffix)
}
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// FileSize calculates the file size and generate user-friendly string.
func FileSize(s int64) string {
sizes := []string{"B", "KB", "MB", "GB", "TB", "PB", "EB"}
return humanateBytes(uint64(s), 1024, sizes)
}