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package form
import (
"reflect"
"github.com/go-macaron/binding"
"gopkg.in/macaron.v1"
"github.com/Unknwon/com"
"strings"
"regexp"
"fmt"
log "gopkg.in/clog.v1"
)
const ERR_ALPHA_DASH_DOT_SLASH = "AlphaDashDotSlashError"
var AlphaDashDotSlashPattern = regexp.MustCompile("[^\\d\\w-_\\./]")
func init() {
binding.SetNameMapper(com.ToSnakeCase)
binding.AddRule(&binding.Rule{
IsMatch: func(rule string) bool {
return rule == "AlphaDashDotSlash"
},
IsValid: func(errs binding.Errors, name string, v interface{}) (bool, binding.Errors) {
if AlphaDashDotSlashPattern.MatchString(fmt.Sprintf("%v", v)) {
errs.Add([]string{name}, ERR_ALPHA_DASH_DOT_SLASH, "AlphaDashDotSlash")
return false, errs
}
return true, errs
},
})
}
type Form interface {
binding.Validator
}
// Assign assign form values back to the template data.
func Assign(form interface{}, data map[string]interface{}) {
typ := reflect.TypeOf(form)
val := reflect.ValueOf(form)
if typ.Kind() == reflect.Ptr {
typ = typ.Elem()
val = val.Elem()
}
for i := 0; i < typ.NumField(); i++ {
field := typ.Field(i)
fieldName := field.Tag.Get("form")
// Allow ignored fields in the struct
if fieldName == "-" {
continue
} else if len(fieldName) == 0 {
fieldName = com.ToSnakeCase(field.Name)
}
data[fieldName] = val.Field(i).Interface()
}
}
func getRuleBody(field reflect.StructField, prefix string) string {
for _, rule := range strings.Split(field.Tag.Get("binding"), ";") {
if strings.HasPrefix(rule, prefix) {
return rule[len(prefix) : len(rule)-1]
}
}
return ""
}
func getSize(field reflect.StructField) string {
return getRuleBody(field, "Size(")
}
func getMinSize(field reflect.StructField) string {
return getRuleBody(field, "MinSize(")
}
func getMaxSize(field reflect.StructField) string {
return getRuleBody(field, "MaxSize(")
}
func getInclude(field reflect.StructField) string {
return getRuleBody(field, "Include(")
}
func validate(errs binding.Errors, data map[string]interface{}, f Form, l macaron.Locale) binding.Errors {
log.Trace("Validating form")
if errs.Len() == 0 {
return errs
}
data["HasError"] = true
Assign(f, data)
typ := reflect.TypeOf(f)
val := reflect.ValueOf(f)
if typ.Kind() == reflect.Ptr {
typ = typ.Elem()
val = val.Elem()
}
for i := 0; i < typ.NumField(); i++ {
field := typ.Field(i)
fieldName := field.Tag.Get("form")
// Allow ignored fields in the struct
if fieldName == "-" {
continue
}
if errs[0].FieldNames[0] == field.Name {
data["Err_"+field.Name] = true
trName := field.Tag.Get("locale")
if len(trName) == 0 {
trName = l.Tr("form." + field.Name)
} else {
trName = l.Tr(trName)
}
switch errs[0].Classification {
case binding.ERR_REQUIRED:
data["ErrorMsg"] = trName + l.Tr("form.require_error")
case binding.ERR_ALPHA_DASH:
data["ErrorMsg"] = trName + l.Tr("form.alpha_dash_error")
case binding.ERR_ALPHA_DASH_DOT:
data["ErrorMsg"] = trName + l.Tr("form.alpha_dash_dot_error")
case ERR_ALPHA_DASH_DOT_SLASH:
data["ErrorMsg"] = trName + l.Tr("form.alpha_dash_dot_slash_error")
case binding.ERR_SIZE:
data["ErrorMsg"] = trName + l.Tr("form.size_error", getSize(field))
case binding.ERR_MIN_SIZE:
data["ErrorMsg"] = trName + l.Tr("form.min_size_error", getMinSize(field))
case binding.ERR_MAX_SIZE:
data["ErrorMsg"] = trName + l.Tr("form.max_size_error", getMaxSize(field))
case binding.ERR_EMAIL:
data["ErrorMsg"] = trName + l.Tr("form.email_error")
case binding.ERR_URL:
data["ErrorMsg"] = trName + l.Tr("form.url_error")
case binding.ERR_INCLUDE:
data["ErrorMsg"] = trName + l.Tr("form.include_error", getInclude(field))
default:
data["ErrorMsg"] = l.Tr("form.unknown_error") + " " + errs[0].Classification
}
return errs
}
}
return errs
}