💯Go Struct and Field validation, including Cross Field, Cross Struct, Map, Slice and Array diving
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validator/baked_in.go

865 lines
20 KiB

package validator
import (
"fmt"
"net/url"
"reflect"
"strconv"
"strings"
"time"
"unicode/utf8"
)
// BakedInValidators is the default map of ValidationFunc
// you can add, remove or even replace items to suite your needs,
// or even disregard and use your own map if so desired.
var BakedInValidators = map[string]Func{
"required": hasValue,
"len": hasLengthOf,
"min": hasMinOf,
"max": hasMaxOf,
"eq": isEq,
"ne": isNe,
"lt": isLt,
"lte": isLte,
"gt": isGt,
"gte": isGte,
"eqfield": isEqField,
"nefield": isNeField,
"gtefield": isGteField,
"gtfield": isGtField,
"ltefield": isLteField,
"ltfield": isLtField,
"alpha": isAlpha,
"alphanum": isAlphanum,
"numeric": isNumeric,
"number": isNumber,
"hexadecimal": isHexadecimal,
"hexcolor": isHexcolor,
"rgb": isRgb,
"rgba": isRgba,
"hsl": isHsl,
"hsla": isHsla,
"email": isEmail,
"url": isURL,
"uri": isURI,
"base64": isBase64,
"contains": contains,
"containsany": containsAny,
"containsrune": containsRune,
"excludes": excludes,
"excludesall": excludesAll,
"excludesrune": excludesRune,
}
func excludesRune(top interface{}, current interface{}, field interface{}, param string) bool {
return !containsRune(top, current, field, param)
}
func excludesAll(top interface{}, current interface{}, field interface{}, param string) bool {
return !containsAny(top, current, field, param)
}
func excludes(top interface{}, current interface{}, field interface{}, param string) bool {
return !contains(top, current, field, param)
}
func containsRune(top interface{}, current interface{}, field interface{}, param string) bool {
r, _ := utf8.DecodeRuneInString(param)
return strings.ContainsRune(field.(string), r)
}
func containsAny(top interface{}, current interface{}, field interface{}, param string) bool {
return strings.ContainsAny(field.(string), param)
}
func contains(top interface{}, current interface{}, field interface{}, param string) bool {
return strings.Contains(field.(string), param)
}
func isNeField(top interface{}, current interface{}, field interface{}, param string) bool {
return !isEqField(top, current, field, param)
}
func isNe(top interface{}, current interface{}, field interface{}, param string) bool {
return !isEq(top, current, field, param)
}
func isEqField(top interface{}, current interface{}, field interface{}, param string) bool {
if current == nil {
panic("struct not passed for cross validation")
}
currentVal := reflect.ValueOf(current)
if currentVal.Kind() == reflect.Ptr && !currentVal.IsNil() {
currentVal = reflect.ValueOf(currentVal.Elem().Interface())
}
var currentFielVal reflect.Value
switch currentVal.Kind() {
case reflect.Struct:
if currentVal.Type() == reflect.TypeOf(time.Time{}) {
currentFielVal = currentVal
break
}
f := currentVal.FieldByName(param)
if f.Kind() == reflect.Invalid {
panic(fmt.Sprintf("Field \"%s\" not found in struct", param))
}
currentFielVal = f
default:
currentFielVal = currentVal
}
if currentFielVal.Kind() == reflect.Ptr && !currentFielVal.IsNil() {
currentFielVal = reflect.ValueOf(currentFielVal.Elem().Interface())
}
fv := reflect.ValueOf(field)
switch fv.Kind() {
case reflect.String:
return fv.String() == currentFielVal.String()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return fv.Int() == currentFielVal.Int()
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return fv.Uint() == currentFielVal.Uint()
case reflect.Float32, reflect.Float64:
return fv.Float() == currentFielVal.Float()
case reflect.Slice, reflect.Map, reflect.Array:
return int64(fv.Len()) == int64(currentFielVal.Len())
case reflect.Struct:
if fv.Type() == reflect.TypeOf(time.Time{}) {
if currentFielVal.Type() != reflect.TypeOf(time.Time{}) {
panic("Bad Top Level field type")
}
t := currentFielVal.Interface().(time.Time)
fieldTime := field.(time.Time)
return fieldTime.Equal(t)
}
}
panic(fmt.Sprintf("Bad field type %T", field))
}
func isEq(top interface{}, current interface{}, field interface{}, param string) bool {
st := reflect.ValueOf(field)
switch st.Kind() {
case reflect.String:
return st.String() == param
case reflect.Slice, reflect.Map, reflect.Array:
p := asInt(param)
return int64(st.Len()) == p
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
p := asInt(param)
return st.Int() == p
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
p := asUint(param)
return st.Uint() == p
case reflect.Float32, reflect.Float64:
p := asFloat(param)
return st.Float() == p
}
panic(fmt.Sprintf("Bad field type %T", field))
}
func isBase64(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(base64Regex, field)
}
func isURI(top interface{}, current interface{}, field interface{}, param string) bool {
st := reflect.ValueOf(field)
switch st.Kind() {
case reflect.String:
_, err := url.ParseRequestURI(field.(string))
return err == nil
}
panic(fmt.Sprintf("Bad field type %T", field))
}
func isURL(top interface{}, current interface{}, field interface{}, param string) bool {
st := reflect.ValueOf(field)
switch st.Kind() {
case reflect.String:
url, err := url.ParseRequestURI(field.(string))
if err != nil {
return false
}
if len(url.Scheme) == 0 {
return false
}
return err == nil
}
panic(fmt.Sprintf("Bad field type %T", field))
}
func isEmail(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(emailRegex, field)
}
func isHsla(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(hslaRegex, field)
}
func isHsl(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(hslRegex, field)
}
func isRgba(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(rgbaRegex, field)
}
func isRgb(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(rgbRegex, field)
}
func isHexcolor(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(hexcolorRegex, field)
}
func isHexadecimal(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(hexadecimalRegex, field)
}
func isNumber(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(numberRegex, field)
}
func isNumeric(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(numericRegex, field)
}
func isAlphanum(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(alphaNumericRegex, field)
}
func isAlpha(top interface{}, current interface{}, field interface{}, param string) bool {
return matchesRegex(alphaRegex, field)
}
func hasValue(top interface{}, current interface{}, field interface{}, param string) bool {
st := reflect.ValueOf(field)
switch st.Kind() {
case reflect.Slice, reflect.Map, reflect.Array:
return field != nil && int64(st.Len()) > 0
default:
return field != nil && field != reflect.Zero(reflect.TypeOf(field)).Interface()
}
}
func isGteField(top interface{}, current interface{}, field interface{}, param string) bool {
if current == nil {
panic("struct not passed for cross validation")
}
currentVal := reflect.ValueOf(current)
if currentVal.Kind() == reflect.Ptr && !currentVal.IsNil() {
currentVal = reflect.ValueOf(currentVal.Elem().Interface())
}
var currentFielVal reflect.Value
switch currentVal.Kind() {
case reflect.Struct:
if currentVal.Type() == reflect.TypeOf(time.Time{}) {
currentFielVal = currentVal
break
}
f := currentVal.FieldByName(param)
if f.Kind() == reflect.Invalid {
panic(fmt.Sprintf("Field \"%s\" not found in struct", param))
}
currentFielVal = f
default:
currentFielVal = currentVal
}
if currentFielVal.Kind() == reflect.Ptr && !currentFielVal.IsNil() {
currentFielVal = reflect.ValueOf(currentFielVal.Elem().Interface())
}
fv := reflect.ValueOf(field)
switch fv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return fv.Int() >= currentFielVal.Int()
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return fv.Uint() >= currentFielVal.Uint()
case reflect.Float32, reflect.Float64:
return fv.Float() >= currentFielVal.Float()
case reflect.Struct:
if fv.Type() == reflect.TypeOf(time.Time{}) {
if currentFielVal.Type() != reflect.TypeOf(time.Time{}) {
panic("Bad Top Level field type")
}
t := currentFielVal.Interface().(time.Time)
fieldTime := field.(time.Time)
return fieldTime.After(t) || fieldTime.Equal(t)
}
}
panic(fmt.Sprintf("Bad field type %T", field))
}
func isGtField(top interface{}, current interface{}, field interface{}, param string) bool {
if current == nil {
panic("struct not passed for cross validation")
}
currentVal := reflect.ValueOf(current)
if currentVal.Kind() == reflect.Ptr && !currentVal.IsNil() {
currentVal = reflect.ValueOf(currentVal.Elem().Interface())
}
var currentFielVal reflect.Value
switch currentVal.Kind() {
case reflect.Struct:
if currentVal.Type() == reflect.TypeOf(time.Time{}) {
currentFielVal = currentVal
break
}
f := currentVal.FieldByName(param)
if f.Kind() == reflect.Invalid {
panic(fmt.Sprintf("Field \"%s\" not found in struct", param))
}
currentFielVal = f
default:
currentFielVal = currentVal
}
if currentFielVal.Kind() == reflect.Ptr && !currentFielVal.IsNil() {
currentFielVal = reflect.ValueOf(currentFielVal.Elem().Interface())
}
fv := reflect.ValueOf(field)
switch fv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return fv.Int() > currentFielVal.Int()
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return fv.Uint() > currentFielVal.Uint()
case reflect.Float32, reflect.Float64:
return fv.Float() > currentFielVal.Float()
case reflect.Struct:
if fv.Type() == reflect.TypeOf(time.Time{}) {
if currentFielVal.Type() != reflect.TypeOf(time.Time{}) {
panic("Bad Top Level field type")
}
t := currentFielVal.Interface().(time.Time)
fieldTime := field.(time.Time)
return fieldTime.After(t)
}
}
panic(fmt.Sprintf("Bad field type %T", field))
}
func isGte(top interface{}, current interface{}, field interface{}, param string) bool {
st := reflect.ValueOf(field)
switch st.Kind() {
case reflect.String:
p := asInt(param)
return int64(len(st.String())) >= p
case reflect.Slice, reflect.Map, reflect.Array:
p := asInt(param)
return int64(st.Len()) >= p
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
p := asInt(param)
return st.Int() >= p
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
p := asUint(param)
return st.Uint() >= p
case reflect.Float32, reflect.Float64:
p := asFloat(param)
return st.Float() >= p
case reflect.Struct:
if st.Type() == reflect.TypeOf(time.Time{}) {
now := time.Now().UTC()
t := field.(time.Time)
return t.After(now) || t.Equal(now)
}
}
panic(fmt.Sprintf("Bad field type %T", field))
}
func isGt(top interface{}, current interface{}, field interface{}, param string) bool {
st := reflect.ValueOf(field)
switch st.Kind() {
case reflect.String:
p := asInt(param)
return int64(len(st.String())) > p
case reflect.Slice, reflect.Map, reflect.Array:
p := asInt(param)
return int64(st.Len()) > p
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
p := asInt(param)
return st.Int() > p
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
p := asUint(param)
return st.Uint() > p
case reflect.Float32, reflect.Float64:
p := asFloat(param)
return st.Float() > p
case reflect.Struct:
if st.Type() == reflect.TypeOf(time.Time{}) {
return field.(time.Time).After(time.Now().UTC())
}
}
panic(fmt.Sprintf("Bad field type %T", field))
}
// length tests whether a variable's length is equal to a given
// value. For strings it tests the number of characters whereas
// for maps and slices it tests the number of items.
func hasLengthOf(top interface{}, current interface{}, field interface{}, param string) bool {
st := reflect.ValueOf(field)
switch st.Kind() {
case reflect.String:
p := asInt(param)
return int64(len(st.String())) == p
case reflect.Slice, reflect.Map, reflect.Array:
p := asInt(param)
return int64(st.Len()) == p
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
p := asInt(param)
return st.Int() == p
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
p := asUint(param)
return st.Uint() == p
case reflect.Float32, reflect.Float64:
p := asFloat(param)
return st.Float() == p
}
panic(fmt.Sprintf("Bad field type %T", field))
}
// min tests whether a variable value is larger or equal to a given
// number. For number types, it's a simple lesser-than test; for
// strings it tests the number of characters whereas for maps
// and slices it tests the number of items.
func hasMinOf(top interface{}, current interface{}, field interface{}, param string) bool {
return isGte(top, current, field, param)
}
func isLteField(top interface{}, current interface{}, field interface{}, param string) bool {
if current == nil {
panic("struct not passed for cross validation")
}
currentVal := reflect.ValueOf(current)
if currentVal.Kind() == reflect.Ptr && !currentVal.IsNil() {
currentVal = reflect.ValueOf(currentVal.Elem().Interface())
}
var currentFielVal reflect.Value
switch currentVal.Kind() {
case reflect.Struct:
if currentVal.Type() == reflect.TypeOf(time.Time{}) {
currentFielVal = currentVal
break
}
f := currentVal.FieldByName(param)
if f.Kind() == reflect.Invalid {
panic(fmt.Sprintf("Field \"%s\" not found in struct", param))
}
currentFielVal = f
default:
currentFielVal = currentVal
}
if currentFielVal.Kind() == reflect.Ptr && !currentFielVal.IsNil() {
currentFielVal = reflect.ValueOf(currentFielVal.Elem().Interface())
}
fv := reflect.ValueOf(field)
switch fv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return fv.Int() <= currentFielVal.Int()
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return fv.Uint() <= currentFielVal.Uint()
case reflect.Float32, reflect.Float64:
return fv.Float() <= currentFielVal.Float()
case reflect.Struct:
if fv.Type() == reflect.TypeOf(time.Time{}) {
if currentFielVal.Type() != reflect.TypeOf(time.Time{}) {
panic("Bad Top Level field type")
}
t := currentFielVal.Interface().(time.Time)
fieldTime := field.(time.Time)
return fieldTime.Before(t) || fieldTime.Equal(t)
}
}
panic(fmt.Sprintf("Bad field type %T", field))
}
func isLtField(top interface{}, current interface{}, field interface{}, param string) bool {
if current == nil {
panic("struct not passed for cross validation")
}
currentVal := reflect.ValueOf(current)
if currentVal.Kind() == reflect.Ptr && !currentVal.IsNil() {
currentVal = reflect.ValueOf(currentVal.Elem().Interface())
}
var currentFielVal reflect.Value
switch currentVal.Kind() {
case reflect.Struct:
if currentVal.Type() == reflect.TypeOf(time.Time{}) {
currentFielVal = currentVal
break
}
f := currentVal.FieldByName(param)
if f.Kind() == reflect.Invalid {
panic(fmt.Sprintf("Field \"%s\" not found in struct", param))
}
currentFielVal = f
default:
currentFielVal = currentVal
}
if currentFielVal.Kind() == reflect.Ptr && !currentFielVal.IsNil() {
currentFielVal = reflect.ValueOf(currentFielVal.Elem().Interface())
}
fv := reflect.ValueOf(field)
switch fv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return fv.Int() < currentFielVal.Int()
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return fv.Uint() < currentFielVal.Uint()
case reflect.Float32, reflect.Float64:
return fv.Float() < currentFielVal.Float()
case reflect.Struct:
if fv.Type() == reflect.TypeOf(time.Time{}) {
if currentFielVal.Type() != reflect.TypeOf(time.Time{}) {
panic("Bad Top Level field type")
}
t := currentFielVal.Interface().(time.Time)
fieldTime := field.(time.Time)
return fieldTime.Before(t)
}
}
panic(fmt.Sprintf("Bad field type %T", field))
}
func isLte(top interface{}, current interface{}, field interface{}, param string) bool {
st := reflect.ValueOf(field)
switch st.Kind() {
case reflect.String:
p := asInt(param)
return int64(len(st.String())) <= p
case reflect.Slice, reflect.Map, reflect.Array:
p := asInt(param)
return int64(st.Len()) <= p
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
p := asInt(param)
return st.Int() <= p
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
p := asUint(param)
return st.Uint() <= p
case reflect.Float32, reflect.Float64:
p := asFloat(param)
return st.Float() <= p
case reflect.Struct:
if st.Type() == reflect.TypeOf(time.Time{}) {
now := time.Now().UTC()
t := field.(time.Time)
return t.Before(now) || t.Equal(now)
}
}
panic(fmt.Sprintf("Bad field type %T", field))
}
func isLt(top interface{}, current interface{}, field interface{}, param string) bool {
st := reflect.ValueOf(field)
switch st.Kind() {
case reflect.String:
p := asInt(param)
return int64(len(st.String())) < p
case reflect.Slice, reflect.Map, reflect.Array:
p := asInt(param)
return int64(st.Len()) < p
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
p := asInt(param)
return st.Int() < p
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
p := asUint(param)
return st.Uint() < p
case reflect.Float32, reflect.Float64:
p := asFloat(param)
return st.Float() < p
case reflect.Struct:
if st.Type() == reflect.TypeOf(time.Time{}) {
return field.(time.Time).Before(time.Now().UTC())
}
}
panic(fmt.Sprintf("Bad field type %T", field))
}
// max tests whether a variable value is lesser than a given
// value. For numbers, it's a simple lesser-than test; for
// strings it tests the number of characters whereas for maps
// and slices it tests the number of items.
func hasMaxOf(top interface{}, current interface{}, field interface{}, param string) bool {
return isLte(top, current, field, param)
}
// asInt retuns the parameter as a int64
// or panics if it can't convert
func asInt(param string) int64 {
i, err := strconv.ParseInt(param, 0, 64)
panicIf(err)
return i
}
// asUint returns the parameter as a uint64
// or panics if it can't convert
func asUint(param string) uint64 {
i, err := strconv.ParseUint(param, 0, 64)
panicIf(err)
return i
}
// asFloat returns the parameter as a float64
// or panics if it can't convert
func asFloat(param string) float64 {
i, err := strconv.ParseFloat(param, 64)
panicIf(err)
return i
}
func panicIf(err error) {
if err != nil {
panic(err.Error())
}
}