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validator_helper_string.go
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/
validator_helper_string.go
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package validator
import (
"fmt"
"strings"
"unicode/utf8"
)
type StrLenMode int
const (
STR_LEN_MODE__LENGTH StrLenMode = iota
STR_LEN_MODE__RUNE_COUNT
)
var StrLenModes = map[StrLenMode]func(s string) uint64{
STR_LEN_MODE__LENGTH: func(s string) uint64 { return uint64(len(s)) },
STR_LEN_MODE__RUNE_COUNT: func(s string) uint64 { return uint64(utf8.RuneCount([]byte(s))) },
}
func ParseStrLenMode(s string) (StrLenMode, error) {
switch strings.ToLower(s) {
case "rune_count":
return STR_LEN_MODE__RUNE_COUNT, nil
case "length", "":
return STR_LEN_MODE__LENGTH, nil
default:
return STR_LEN_MODE__LENGTH, fmt.Errorf("unsupported string length mode")
}
}
func (m StrLenMode) String() string {
switch m {
case STR_LEN_MODE__RUNE_COUNT:
return "rune_count"
default:
return "length"
}
}
func StringRuleParam(r *Rule) (mode StrLenMode, err error) {
if r.Params != nil {
if len(r.Params) != 1 {
err = fmt.Errorf(
"string should only 1 parameter, but got %d",
len(r.Params),
)
return
}
mode, err = ParseStrLenMode(string(r.Params[0].Bytes()))
return
}
if r.Name == "char" {
return STR_LEN_MODE__RUNE_COUNT, nil
}
return STR_LEN_MODE__LENGTH, nil
}
func StringRuleValues(r *Rule) map[string]string {
values := r.ComputedValues()
if values == nil {
return nil
}
enums := map[string]string{}
for _, v := range values {
str := string(v.Bytes())
enums[str] = str
}
return enums
}