golib/infra/ii/form_http.go

package ii

import (
	"encoding/json"
	"net/http"

	"golib/network"
)

const (
	maxReadFromValidateSize = 4096
)

// Request: {"itemName": "test.test", "fieldName": ["testFloat64", "testInt64"]}
// Response: {"itemName: "test.test", "fields": [...]}
// Response.field: {
//              "name":"testFloat64",
//              "label": "测试Float"
//              "type":"float64",
//              "required":true,
//              "unique":false,
//              "minimum":1,
//              "maximum":3.1415,
//              "decimal":3,
//              "default": 3.1415
//              "enums": [{"key":"3.1415","value":3.1415}]
//          }

type formValidateGet struct {
	ItemName  string   `json:"itemName"`
	FieldName []string `json:"fieldName"`
}

type formValidateGetResponse struct {
	ItemName string          `json:"itemName"`
	Fields   []FieldInfoJSON `json:"fields"`
}

type formValidationHandler struct {
	items Items
}

func (f *formValidationHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	b, err := network.HTTP.ReadRequestBody(w, r, maxReadFromValidateSize)
	if err != nil {
		network.HTTP.Error(w, http.StatusForbidden)
		return
	}
	var fvg formValidateGet
	if err = json.Unmarshal(b, &fvg); err != nil {
		network.HTTP.Error(w, http.StatusBadRequest)
		return
	}
	itemInfo, ok := f.items.Has(fvg.ItemName)
	if !ok {
		network.HTTP.Error(w, http.StatusNotFound)
		return
	}

	formResp := new(formValidateGetResponse)
	formResp.ItemName = fvg.ItemName
	formResp.Fields = make([]FieldInfoJSON, len(fvg.FieldName))

	for i, fieldName := range fvg.FieldName {
		field, o := itemInfo.Field(fieldName)
		if !o {
			network.HTTP.Error(w, http.StatusBadRequest)
			return
		}
		formResp.Fields[i] = field.ValidateJSON()
	}

	p, err := json.Marshal(formResp)
	if err != nil {
		network.HTTP.Error(w, http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", network.HTTPContentTypeJson)
	w.WriteHeader(http.StatusOK)
	_, _ = w.Write(p)
}

func NewFormValidateHandle(items Items) http.Handler {
	fvh := formValidationHandler{
		items: items,
	}
	return &fvh
}