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add validators

This commit is contained in:
miraclesu 2013-07-19 16:49:28 +08:00
parent ec7324e972
commit a41cd17092

270
validation/validators.go Normal file
View File

@ -0,0 +1,270 @@
package revel
import (
"fmt"
"reflect"
"regexp"
"time"
)
type Validator interface {
IsSatisfied(interface{}) bool
DefaultMessage() string
}
type Required struct{}
func (r Required) IsSatisfied(obj interface{}) bool {
if obj == nil {
return false
}
if str, ok := obj.(string); ok {
return len(str) > 0
}
if b, ok := obj.(bool); ok {
return b
}
if i, ok := obj.(int); ok {
return i != 0
}
if t, ok := obj.(time.Time); ok {
return !t.IsZero()
}
v := reflect.ValueOf(obj)
if v.Kind() == reflect.Slice {
return v.Len() > 0
}
return true
}
func (r Required) DefaultMessage() string {
return "Required"
}
// TODO
// type Unique struct {}
type Min struct {
Min int
}
func (m Min) IsSatisfied(obj interface{}) bool {
num, ok := obj.(int)
if ok {
return num >= m.Min
}
return false
}
func (m Min) DefaultMessage() string {
return fmt.Sprintln("Minimum is", m.Min)
}
type Max struct {
Max int
}
func (m Max) IsSatisfied(obj interface{}) bool {
num, ok := obj.(int)
if ok {
return num <= m.Max
}
return false
}
func (m Max) DefaultMessage() string {
return fmt.Sprintln("Maximum is", m.Max)
}
// Requires an integer to be within Min, Max inclusive.
type Range struct {
Min
Max
}
func (r Range) IsSatisfied(obj interface{}) bool {
return r.Min.IsSatisfied(obj) && r.Max.IsSatisfied(obj)
}
func (r Range) DefaultMessage() string {
return fmt.Sprintln("Range is", r.Min.Min, "to", r.Max.Max)
}
// Requires an array or string to be at least a given length.
type MinSize struct {
Min int
}
func (m MinSize) IsSatisfied(obj interface{}) bool {
if str, ok := obj.(string); ok {
return len(str) >= m.Min
}
v := reflect.ValueOf(obj)
if v.Kind() == reflect.Slice {
return v.Len() >= m.Min
}
return false
}
func (m MinSize) DefaultMessage() string {
return fmt.Sprintln("Minimum size is", m.Min)
}
// Requires an array or string to be at most a given length.
type MaxSize struct {
Max int
}
func (m MaxSize) IsSatisfied(obj interface{}) bool {
if str, ok := obj.(string); ok {
return len(str) <= m.Max
}
v := reflect.ValueOf(obj)
if v.Kind() == reflect.Slice {
return v.Len() <= m.Max
}
return false
}
func (m MaxSize) DefaultMessage() string {
return fmt.Sprintln("Maximum size is", m.Max)
}
// Requires an array or string to be exactly a given length.
type Length struct {
N int
}
func (s Length) IsSatisfied(obj interface{}) bool {
if str, ok := obj.(string); ok {
return len(str) == s.N
}
v := reflect.ValueOf(obj)
if v.Kind() == reflect.Slice {
return v.Len() == s.N
}
return false
}
func (s Length) DefaultMessage() string {
return fmt.Sprintln("Required length is", s.N)
}
type Alpha struct{}
func (a Alpha) IsSatisfied(obj interface{}) bool {
if str, ok := obj.(string); ok {
for _, v := range str {
if ('Z' < v || v < 'A') && ('z' < v || v < 'a') {
return false
}
}
}
return false
}
func (a Alpha) DefaultMessage() string {
return fmt.Sprintln("Must be valid alpha characters")
}
type Numeric struct{}
func (n Numeric) IsSatisfied(obj interface{}) bool {
if str, ok := obj.(string); ok {
for _, v := range str {
if '9' < v || v < '0' {
return false
}
}
}
return false
}
func (n Numeric) DefaultMessage() string {
return fmt.Sprintln("Must be valid numeric characters")
}
type AlphaNumeric struct{}
func (a AlphaNumeric) IsSatisfied(obj interface{}) bool {
if str, ok := obj.(string); ok {
for _, v := range str {
if ('Z' < v || v < 'A') && ('z' < v || v < 'a') && ('9' < v || v < '0') {
return false
}
}
}
return false
}
func (a AlphaNumeric) DefaultMessage() string {
return fmt.Sprintln("Must be valid alpha or numeric characters")
}
// Requires a string to match a given regex.
type Match struct {
Regexp *regexp.Regexp
}
func (m Match) IsSatisfied(obj interface{}) bool {
str := obj.(string)
return m.Regexp.MatchString(str)
}
func (m Match) DefaultMessage() string {
return fmt.Sprintln("Must match", m.Regexp)
}
// Requires a string to not match a given regex.
type NoMatch struct {
Match
}
func (m NoMatch) IsSatisfied(obj interface{}) bool {
return !m.Match.IsSatisfied(obj)
}
func (m NoMatch) DefaultMessage() string {
return fmt.Sprintln("Must no match", m.Regexp)
}
var alphaDashPattern = regexp.MustCompile("[^\\d\\w-_]")
type AlphaDash struct {
NoMatch
}
func (a AlphaDash) DefaultMessage() string {
return fmt.Sprintln("Must be valid characters")
}
var emailPattern = regexp.MustCompile("[\\w!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\w!#$%&'*+/=?^_`{|}~-]+)*@(?:[\\w](?:[\\w-]*[\\w])?\\.)+[a-zA-Z0-9](?:[\\w-]*[\\w])?")
type Email struct {
Match
}
func (e Email) DefaultMessage() string {
return fmt.Sprintln("Must be a valid email address")
}
var ipPattern = regexp.MustCompile("((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-5]|[01]?\\d\\d?)")
type IP struct {
Match
}
func (i IP) DefaultMessage() string {
return fmt.Sprintln("Must be a valid ip address")
}
var base64Pattern = regexp.MustCompile("^(?:[A-Za-z0-99+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$")
type Base64 struct {
Match
}
func (b Base64) DefaultMessage() string {
return fmt.Sprintln("Must be valid base64 characters")
}