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package pb
import (
"fmt"
"strings"
"time"
)
type Units int
const (
// U_NO are default units, they represent a simple value and are not formatted at all.
U_NO Units = iota
// U_BYTES units are formatted in a human readable way (b, Bb, Mb, ...)
U_BYTES
// U_DURATION units are formatted in a human readable way (3h14m15s)
U_DURATION
)
func Format(i int64) *formatter {
return &formatter{n: i}
}
type formatter struct {
n int64
unit Units
width int
perSec bool
}
func (f *formatter) Value(n int64) *formatter {
f.n = n
return f
}
func (f *formatter) To(unit Units) *formatter {
f.unit = unit
return f
}
func (f *formatter) Width(width int) *formatter {
f.width = width
return f
}
func (f *formatter) PerSec() *formatter {
f.perSec = true
return f
}
func (f *formatter) String() (out string) {
switch f.unit {
case U_BYTES:
out = formatBytes(f.n)
case U_DURATION:
d := time.Duration(f.n)
if d > time.Hour*24 {
out = fmt.Sprintf("%dd", d/24/time.Hour)
d -= (d / time.Hour / 24) * (time.Hour * 24)
}
out = fmt.Sprintf("%s%v", out, d)
default:
out = fmt.Sprintf(fmt.Sprintf("%%%dd", f.width), f.n)
}
if f.perSec {
out += "/s"
}
return
}
// Convert bytes to human readable string. Like a 2 MB, 64.2 KB, 52 B
func formatBytes(i int64) (result string) {
switch {
case i > (1024 * 1024 * 1024 * 1024):
result = fmt.Sprintf("%.02f TB", float64(i)/1024/1024/1024/1024)
case i > (1024 * 1024 * 1024):
result = fmt.Sprintf("%.02f GB", float64(i)/1024/1024/1024)
case i > (1024 * 1024):
result = fmt.Sprintf("%.02f MB", float64(i)/1024/1024)
case i > 1024:
result = fmt.Sprintf("%.02f KB", float64(i)/1024)
default:
result = fmt.Sprintf("%d B", i)
}
result = strings.Trim(result, " ")
return
}
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