// Package parse_body ...
//
// Description : parse_body ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2024-10-22 16:43
package parse_body

import (
	"errors"
	"git.zhangdeman.cn/zhangdeman/gin/request/abstract"
	"github.com/gin-gonic/gin"
	"strings"
)

var (
	requestBodyParseAdaptorTable = map[string]abstract.RequestBodyParseAdaptor{}
)

func init() {
	adaptorList := []abstract.RequestBodyParseAdaptor{
		JsonAdaptor{},
		FormUrlEncode{},
		XmlAdaptor{},
	}
	for _, itemAdaptor := range adaptorList {
		Register(itemAdaptor)
	}
}

// Register 注册适配器实例
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 16:45 2024/10/22
func Register(adaptor abstract.RequestBodyParseAdaptor) {
	if nil == adaptor {
		return
	}
	requestBodyParseAdaptorTable[adaptor.ContentType()] = adaptor
}

// Execute 解析请求BODY数据
func Execute(ctx *gin.Context, receiver any) ([]byte, error) {
	contentType := strings.ToLower(strings.ReplaceAll(ctx.ContentType(), " ", ""))
	// 裁剪出真实的类型，之所以截取，是因为 content_type 中可能还包含编码信息, 如 : application/json;charset=utf8
	contentTypeArr := strings.Split(contentType, ";")
	contentType = contentTypeArr[0]
	if _, exist := requestBodyParseAdaptorTable[contentType]; !exist {
		return nil, errors.New(contentType + " : adaptor not found")
	}
	if parseResult, err := requestBodyParseAdaptorTable[contentType].Parse(ctx, receiver); nil != err {
		return nil, err
	} else {
		return parseResult, err
	}
}

// ExecuteForMap 高层级包装，表单解析为map
func ExecuteForMap(ctx *gin.Context) (map[string]any, error) {
	var (
		err    error
		result map[string]any
	)
	if _, err = Execute(ctx, &result); nil != err {
		return nil, err
	}
	return result, nil
}