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form.go
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form.go
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package forms
import (
"encoding/json"
"errors"
"github.com/TeaWeb/code/teautils"
"github.com/iwind/TeaGo/lists"
"github.com/iwind/TeaGo/logs"
"github.com/iwind/TeaGo/maps"
"github.com/iwind/TeaGo/types"
"github.com/iwind/TeaGo/utils/string"
"github.com/robertkrimen/otto"
"net/http"
"reflect"
"strings"
)
type Form struct {
Namespace string `yaml:"namespace" json:"namespace"`
Groups []*Group `yaml:"groups" json:"groups"`
Javascript string `yaml:"javascript" json:"javascript"`
CSS string `yaml:"css" json:"css"`
ValidateCode string `yaml:"validateCode" json:"validateCode"`
vm *otto.Otto
}
func FormDecode(data []byte, form *Form) error {
m := map[string]interface{}{}
err := json.Unmarshal(data, &m)
if err != nil {
return err
}
namespace, found := m["namespace"]
if found {
form.Namespace = types.String(namespace)
}
validateCode, found := m["validateCode"]
if found {
form.ValidateCode = types.String(validateCode)
}
groups, found := m["groups"]
form.Groups = []*Group{}
if found && groups != nil {
if reflect.TypeOf(groups).Kind() == reflect.Slice {
lists.Each(groups, func(k int, v interface{}) {
if v == nil {
return
}
group := &Group{}
form.Groups = append(form.Groups, group)
vMap := maps.NewMap(v)
group.Namespace = vMap.GetString("namespace")
elements := vMap.GetSlice("elements")
lists.Each(elements, func(k int, v interface{}) {
vMap := maps.NewMap(v)
classType := vMap.GetString("classType")
instance, found := allElementTypes[classType]
if !found || instance == nil {
return
}
obj := reflect.New(reflect.TypeOf(instance).Elem()).Interface().(ElementInterface)
err := teautils.MapToObjectJSON(vMap, obj)
if err != nil {
logs.Error(err)
}
group.Elements = append(group.Elements, obj)
})
})
}
}
return nil
}
func NewForm(namespace string) *Form {
vm := otto.New()
vm.Run(`
function FieldError(field, message) {
return {
"field": field,
"error": message
};
}
`)
return &Form{
Namespace: namespace,
vm: vm,
}
}
func (this *Form) NewGroup() *Group {
group := &Group{
Namespace: this.Namespace,
}
this.Groups = append(this.Groups, group)
return group
}
func (this *Form) Compose() {
this.CSS = "<style type=\"text/css\">\n"
this.Javascript = ""
for _, g := range this.Groups {
g.Compose()
for _, e := range g.Elements {
s := e.Super()
if len(s.CSS) > 0 {
this.CSS += s.CSS + "\n\n"
}
if len(s.Javascript) > 0 {
this.Javascript += s.Javascript + "\n\n"
}
}
}
this.CSS += "</style>\n"
}
func (this *Form) Init(values map[string]interface{}) {
eMap := map[string]ElementInterface{} // code => []element
for _, g := range this.Groups {
for _, e := range g.Elements {
s := e.Super()
eMap[s.Code] = e
}
}
for k, v := range values {
e, found := eMap[k]
if !found {
continue
}
// 初始化值
superElement := e.Super()
if len(superElement.InitCode) > 0 {
newValue, err := this.vm.Run("(function() { var value = " + stringutil.JSONEncode(v) + "; var values = " + stringutil.JSONEncode(values) + ";" + superElement.InitCode + "})()")
if err != nil {
logs.Error(err)
} else if !newValue.IsUndefined() {
newValueInterface, err := newValue.Export()
if err == nil {
v = newValueInterface
}
}
}
superElement.Value = v
}
}
func (this *Form) ApplyRequest(req *http.Request) (values map[string]interface{}, errField string, err error) {
values = map[string]interface{}{}
for _, g := range this.Groups {
for _, e := range g.Elements {
superElement := e.Super()
v, skip, err := e.ApplyRequest(req)
if skip {
continue
}
if err != nil {
return values, "", err
}
// 校验字段值
if len(superElement.ValidateCode) > 0 {
newValue, err := this.vm.Run("(function() { var value = " + stringutil.JSONEncode(v) + ";" + superElement.ValidateCode + "})()")
if err != nil {
return values, superElement.Namespace + "_" + superElement.Code, errors.New(strings.Replace(err.Error(), "Error:", "", -1))
}
if !newValue.IsUndefined() {
newValueInterface, err := newValue.Export()
if err == nil {
v = newValueInterface
}
}
}
values[superElement.Code] = v
}
}
// 全局校验
if len(this.ValidateCode) > 0 {
newValues, err := this.vm.Run("(function() { var values = " + stringutil.JSONEncode(values) + ";" + this.ValidateCode + "})()")
if err != nil {
return values, "", err
}
if !newValues.IsUndefined() {
newValueInterface, err := newValues.Export()
if err == nil {
m := map[string]interface{}{}
if reflect.TypeOf(newValueInterface).Kind() == reflect.Map {
mm := maps.NewMap(newValueInterface)
if mm.Has("error") {
field := mm.GetString("field")
errorString := mm.GetString("error")
return values, this.Namespace + "_" + field, errors.New(errorString)
}
m = mm
}
values = m
}
}
}
return values, "", nil
}
func (this *Form) Encode() ([]byte, error) {
for _, g := range this.Groups {
for _, e := range g.Elements {
v := reflect.ValueOf(e).Elem().FieldByName("Element")
if !v.IsValid() {
logs.Error(errors.New("element should has 'Element' field"))
continue
}
element := v.Interface().(Element)
element.ClassType = reflect.TypeOf(e).Elem().Name()
// namespace
element.Namespace = this.Namespace
v.Set(reflect.ValueOf(element))
}
}
data, err := json.Marshal(this)
if err != nil {
return nil, err
}
return data, nil
}
func (this *Form) EncodePretty() ([]byte, error) {
data, err := this.Encode()
if err != nil {
return nil, err
}
m := map[string]interface{}{}
err = json.Unmarshal(data, &m)
if err != nil {
return nil, err
}
data, err = json.MarshalIndent(m, "", " ")
if err != nil {
return nil, err
}
return data, nil
}