init: create project
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36
server/service/mask.go
Normal file
36
server/service/mask.go
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@ -0,0 +1,36 @@
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package service
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func mask(str string, start, end int) string {
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maskLen := end - start
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if maskLen < 0 {
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panic("end cannot be greater than start")
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}
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var maskStr string
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for i := 0; i <= maskLen; i++ {
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maskStr += "*"
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}
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runes := []rune(str)
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return string(append(runes[:start], append([]rune(maskStr), runes[end+1:]...)...))
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}
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func maskLeft(str string, reserve int) string {
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runes := []rune(str)
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if len(runes)-reserve < 0 {
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panic("length of reserved string is out of range")
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}
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for i := 0; i < len(runes)-reserve; i++ {
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runes[i] = '*'
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}
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return string(runes)
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}
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func maskRight(str string, reserve int) string {
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runes := []rune(str)
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if len(runes)-reserve < 0 {
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panic("length of reserved string is out of range")
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}
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for i := len(runes) - 1; i > len(runes)-reserve; i-- {
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runes[i] = '*'
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}
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return string(runes)
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}
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