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validator.go
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validator.go
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package validator
import (
"context"
"regexp"
"strings"
"unicode/utf8"
"github.com/go-playground/locales/en"
ut "github.com/go-playground/universal-translator"
validator "github.com/go-playground/validator/v10"
en_translations "github.com/go-playground/validator/v10/translations/en"
"github.com/openinfradev/tks-api/pkg/domain"
"github.com/openinfradev/tks-api/pkg/log"
)
const (
REGEX_RFC1123 = `^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])$`
REGEX_SIMPLE_SEMVER = `^v\d+\.\d+\.\d+$`
REGEX_PASCAL_CASE = `^([A-Z][a-z\d]+)+$` // 대문자로 시작하는 camel case(pascal case or upper camel case)를 표현한 정규식
REGEX_RFC1123_DNS_LABEL = "[a-z0-9]([-a-z0-9]*[a-z0-9])?"
REGEX_RESOURCE_NAME = `^` + REGEX_RFC1123_DNS_LABEL + "$"
REGEX_RFC1123_SUBDOMAIN = `^` + REGEX_RFC1123_DNS_LABEL + `(\.` + REGEX_RFC1123_DNS_LABEL + `)*$`
)
func NewValidator() (*validator.Validate, *ut.UniversalTranslator) {
en := en.New()
uni := ut.New(en, en)
trans, _ := uni.GetTranslator("en")
v := validator.New()
err := en_translations.RegisterDefaultTranslations(v, trans)
if err != nil {
log.Error(context.TODO(), err)
}
// register custom validator
_ = v.RegisterValidation("rfc1123", validateRfc1123)
_ = v.RegisterValidation("name", validateName)
_ = v.RegisterValidation("version", validateVersion)
_ = v.RegisterValidation("pascalcase", validatePascalCase)
_ = v.RegisterValidation("resourcename", validateResourceName)
_ = v.RegisterValidation("matchnamespace", validateMatchNamespace)
_ = v.RegisterValidation("matchkinds", validateMatchKinds)
// register custom error
_ = v.RegisterTranslation("required", trans, func(ut ut.Translator) error {
return ut.Add("required", "[{0}] 값이 입력되지 않았습니다.", true)
}, func(ut ut.Translator, fe validator.FieldError) string {
t, _ := ut.T("required", fe.Field())
return t
})
_ = v.RegisterTranslation("name", trans, func(ut ut.Translator) error {
return ut.Add("name", "[{0}] 값은 최대 30자내로 입력하세요.", true)
}, func(ut ut.Translator, fe validator.FieldError) string {
t, _ := ut.T("name", fe.Field())
return t
})
return v, uni
}
func validateRfc1123(fl validator.FieldLevel) bool {
if fl.Field().String() == "" {
return false
}
if utf8.RuneCountInString(fl.Field().String()) > 30 {
return false
}
r, _ := regexp.Compile(REGEX_RFC1123)
return r.MatchString(fl.Field().String())
}
func validateName(fl validator.FieldLevel) bool {
if fl.Field().String() == "" {
return false
}
return utf8.RuneCountInString(fl.Field().String()) <= 30
}
func validateVersion(fl validator.FieldLevel) bool {
if fl.Field().String() == "" {
return false
}
r, _ := regexp.Compile(REGEX_SIMPLE_SEMVER)
return r.MatchString(fl.Field().String())
}
func validatePascalCase(fl validator.FieldLevel) bool {
if fl.Field().String() == "" {
return false
}
r, _ := regexp.Compile(REGEX_PASCAL_CASE)
return r.MatchString(fl.Field().String())
}
func validateResourceName(fl validator.FieldLevel) bool {
// 정책 리소스 이름을 지정하지 않으면 지정하기 때문에 유효함
// 다른 리소스 이름을 처리할 때에는 분리 필요
if fl.Field().String() == "" {
return true
}
r, _ := regexp.Compile(REGEX_RESOURCE_NAME)
return r.MatchString(fl.Field().String())
}
func validateMatchKinds(fl validator.FieldLevel) bool {
kinds, ok := fl.Field().Interface().([]domain.Kinds)
if !ok {
return false
}
for _, kind := range kinds {
if ok := validateMatchKindAPIGroup(kind.APIGroups) && validateMatchKindKind(kind.Kinds); !ok {
return false
}
}
return true
}
func validateMatchKindAPIGroup(apigroups []string) bool {
if len(apigroups) == 0 {
return true
}
containsWildcard := false
r, _ := regexp.Compile(REGEX_RFC1123_SUBDOMAIN)
for _, apigroup := range apigroups {
if apigroup == "*" || apigroup == "" {
containsWildcard = true
} else {
if !r.MatchString(apigroup) {
return false
}
}
}
if containsWildcard && len(apigroups) != 1 {
return false
}
return true
}
func validateMatchKindKind(kinds []string) bool {
if len(kinds) == 0 {
return true
}
containsWildcard := false
r, _ := regexp.Compile(REGEX_PASCAL_CASE)
for _, kind := range kinds {
if kind == "*" || kind == "" {
containsWildcard = true
} else {
if !r.MatchString(kind) {
return false
}
}
}
if containsWildcard && len(kinds) != 1 {
return false
}
return true
}
func validateMatchNamespace(fl validator.FieldLevel) bool {
namespaces, ok := fl.Field().Interface().([]string)
if !ok {
return false
}
if len(namespaces) == 0 {
return true
}
containsWildcard := false
r, _ := regexp.Compile(REGEX_RESOURCE_NAME)
for _, namespace := range namespaces {
if namespace == "*" || namespace == "" {
containsWildcard = true
} else {
trimmed := strings.TrimSuffix(strings.TrimPrefix(namespace, "*"), "*")
if !r.MatchString(trimmed) {
return false
}
}
}
if containsWildcard && len(namespaces) != 1 {
return false
}
return true
}