/
desensitize.go
66 lines (60 loc) · 1.49 KB
/
desensitize.go
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// Copyright (c) 2021 Terminus, Inc.
//
// This program is free software: you can use, redistribute, and/or modify
// it under the terms of the GNU Affero General Public License, version 3
// or later ("AGPL"), as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package desensitize
import (
"strings"
"unicode/utf8"
)
func Mobile(str string) string {
return desensitize(str, 3, 4)
}
func Email(str string) string {
parts := strings.SplitN(str, "@", 2)
if len(parts) == 2 {
return desensitize(parts[0], 3, 1) + "@" + parts[1]
}
return desensitize(str, 3, 1)
}
func Name(str string) string {
return desensitize(str, 1, 1)
}
func desensitize(str string, before, end int) string {
l := utf8.RuneCountInString(str)
r := []rune(str)
switch l {
case 0:
return ""
case 1:
return "*"
case 2:
return string(r[0:1]) + "*"
}
k := l / 3
// make sure before+end <= l-k (at least k '*')
if before+k+1 > l {
before = l - k - 1
}
if before+end+k > l {
end = l - before - k
}
var sb strings.Builder
for i := 0; i < l; i++ {
if i < before || i >= l-end {
sb.WriteRune(r[i])
} else {
// replace to '*'
sb.WriteString("*")
}
}
return sb.String()
}