gosora/utils.go

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package main
import "fmt"
import "time"
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import "encoding/base64"
import "crypto/rand"
// Generate a cryptographically secure set of random bytes..
func GenerateSafeString(length int) (string, error) {
rb := make([]byte,length)
_, err := rand.Read(rb)
if err != nil {
return "", err
}
return base64.URLEncoding.EncodeToString(rb), nil
}
func relative_time(in string) (string, error) {
layout := "2006-01-02 15:04:05"
t, err := time.Parse(layout, in)
if err != nil {
return "", err
}
diff := time.Since(t)
hours := diff.Hours()
seconds := diff.Seconds()
switch {
case (hours / 24) > 7:
return t.Format("Mon Jan 2 2006"), err
case int(hours / 24) == 1:
return "1 day ago", err
case int(hours / 24) > 1:
return fmt.Sprintf("%d days ago", int(hours / 24)), err
case seconds <= 1:
return "a moment ago", err
case seconds < 60:
return fmt.Sprintf("%d seconds ago", int(seconds)), err
case seconds < 120:
return "a minute ago", err
case seconds < 3600:
return fmt.Sprintf("%d minutes ago", int(seconds / 60)), err
case seconds < 7200:
return "an hour ago", err
default:
return fmt.Sprintf("%d hours ago", int(seconds / 60 / 60)), err
}
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}