333 lines
9.0 KiB
Go
333 lines
9.0 KiB
Go
// Package json_tool ...
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//
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// Description : json_tool ...
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//
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// Author : go_developer@163.com<张德满>
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//
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// Date : 2022/01/22 9:19 PM
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package json_tool
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import (
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"fmt"
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"io"
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"log"
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"os"
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"strings"
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"github.com/pkg/errors"
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"github.com/tidwall/gjson"
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"github.com/tidwall/sjson"
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)
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const (
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// virtualRoot 虚拟根节点
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virtualRoot = "__VIRTUAL_ROOT__"
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)
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// FilterOption 过滤选项
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 17:59 2023/9/1
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type FilterOption struct {
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DebugModel bool // 调试模式
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LogInstance io.Writer // 日志实例
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}
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// FilterDataRule 参数过滤规则
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 2022/1/22 9:44 PM
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type FilterDataRule struct {
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SourceKey string // 原始数据路径
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MapKey string // 提取后映射到的数据路径
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DefaultValue interface{} // 原始数据路径不存在时的默认值
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WithDefault bool // 是否使用默认值
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}
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// NewDataFilter 获取数据过滤方法实例
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 2022/1/22 9:50 PM
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func NewDataFilter(source string, filterRule []*FilterDataRule, filterOption *FilterOption) *DataFilter {
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if nil == filterOption {
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filterOption = &FilterOption{}
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}
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if filterOption.DebugModel && nil == filterOption.LogInstance {
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filterOption.LogInstance = os.Stdout
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log.SetOutput(filterOption.LogInstance)
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}
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df := &DataFilter{
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source: source,
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filterRule: make([]*FilterDataRule, 0),
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rewriteResult: "{}",
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filterOption: filterOption,
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}
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// 去除末尾的 .[]
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for _, item := range filterRule {
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item.MapKey = strings.TrimRight(item.MapKey, ".[]")
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item.SourceKey = strings.TrimRight(item.SourceKey, ".[]")
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mapIsArr := df.isArrPath(item.MapKey)
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if !mapIsArr {
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df.filterRule = append(df.filterRule, item)
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continue
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}
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if len(df.getArrPathList(item.SourceKey)) < len(df.getArrPathList(item.MapKey)) {
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panic("map result deep more than source data deep")
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}
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formatRes := make([]*FilterDataRule, 0)
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r, _ := df.unfoldSameDeepArr(item.SourceKey, item.MapKey, "", "")
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for _, itemUnfoldResult := range r {
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itemMapArr := strings.Split(itemUnfoldResult.MapKey, ".")
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if len(itemMapArr) != len(strings.Split(item.MapKey, ".")) {
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continue
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}
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formatRes = append(formatRes, itemUnfoldResult)
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}
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df.filterRule = append(df.filterRule, formatRes...)
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}
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return df
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}
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// DataFilter 数据过滤
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 2022/1/22 9:20 PM
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type DataFilter struct {
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source string
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filterRule []*FilterDataRule
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rewriteResult string // json数据重写结果
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filterOption *FilterOption // 过滤选项
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}
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// Filter 数据过滤
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 2022/1/22 9:36 PM
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func (df *DataFilter) Filter() (string, error) {
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df.logPrint(logLevelDebug, "source_data => ", df.source)
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var (
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err error
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)
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for _, itemRule := range df.filterRule {
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sourceIsArr := df.isArrPath(itemRule.SourceKey)
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mapIsArr := df.isArrPath(itemRule.MapKey)
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if !sourceIsArr && !mapIsArr {
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// 输入输出均不是数组, 最简单的场景
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if err = df.setKV(itemRule); nil != err {
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return "", err
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}
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continue
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}
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sourcePathArr := df.getArrPathList(itemRule.SourceKey)
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mapPathArr := df.getArrPathList(itemRule.MapKey)
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if len(mapPathArr) > len(sourcePathArr) {
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df.logPrint(logLevelFatal, "映射的层级深度大于数据源深度", "source_path => "+itemRule.SourceKey, "map_path => "+itemRule.MapKey)
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return "", fmt.Errorf("映射的层级深度大于数据源深度, source_path => %v map_path => %v", itemRule.SourceKey, itemRule.MapKey)
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}
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// 映射至非数组字段
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if !mapIsArr {
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if err = df.setValue(itemRule.MapKey, df.getDataAsSlice(df.source, df.getArrPathList(itemRule.SourceKey))); nil != err {
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df.logPrint(logLevelFatal, "映射非数组, 数据源为数组, 设置失败", "source_path => "+itemRule.SourceKey, "map_path => "+itemRule.MapKey, " err => "+err.Error())
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return "", fmt.Errorf("映射的层级深度大于数据源深度, source_path => %v map_path => %v", itemRule.SourceKey, itemRule.MapKey)
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}
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continue
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}
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if len(mapPathArr) == len(sourcePathArr) {
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// 数组深度一致
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continue
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}
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}
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df.logPrint(logLevelDebug, "过滤结果", df.rewriteResult)
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return df.rewriteResult, nil
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}
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// isArrPath 是否为数组路径
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 16:00 2023/9/1
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func (df *DataFilter) isArrPath(path string) bool {
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return strings.Contains(path, "[]")
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}
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// setSameDeepArr 展开同深度数组的
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 12:19 2023/9/2
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func (df *DataFilter) unfoldSameDeepArr(sourcePath string, mapPath string, sourceRootPath string, mapRootPath string) ([]*FilterDataRule, error) {
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df.logPrint(logLevelDebug, " 同深数组展开", sourceRootPath, mapRootPath)
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result := make([]*FilterDataRule, 0)
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if len(sourcePath) == 0 {
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return result, nil
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}
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sourcePathArr := df.getArrPathList(sourcePath)
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mapPathArr := df.getArrPathList(mapPath)
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if 1 == len(mapPathArr) {
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sourceKey := sourceRootPath + "." + sourcePathArr[0]
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if len(sourcePathArr[0:]) > 0 {
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sourceKey = sourceRootPath + "." + strings.Join(sourcePathArr[0:], ".[].")
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}
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result = append(result, &FilterDataRule{
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SourceKey: sourceKey,
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MapKey: mapRootPath + "." + mapPathArr[0],
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DefaultValue: nil,
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WithDefault: false,
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})
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return result, nil
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}
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// 数组 展开
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for idx := 0; idx < len(mapPathArr); idx++ {
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if len(sourceRootPath) > 0 {
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sourceRootPath = fmt.Sprintf("%v.%v", sourceRootPath, sourcePathArr[idx])
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} else {
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sourceRootPath = sourcePathArr[idx]
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}
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if len(mapRootPath) > 0 {
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mapRootPath = fmt.Sprintf("%v.%v", mapRootPath, mapPathArr[idx])
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} else {
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mapRootPath = mapPathArr[idx]
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}
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valList := gjson.Get(df.source, sourceRootPath)
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if valList.Value() == nil {
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continue
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}
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for i := 0; i < len(valList.Array()); i++ {
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result = append(result, &FilterDataRule{
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SourceKey: sourceRootPath,
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MapKey: mapRootPath,
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DefaultValue: nil,
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WithDefault: false,
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})
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r, e := df.unfoldSameDeepArr(
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strings.Join(sourcePathArr[idx+1:], "[]"),
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strings.Join(mapPathArr[idx+1:], "[]"),
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fmt.Sprintf("%v.%v", sourceRootPath, i),
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fmt.Sprintf("%v.%v", mapRootPath, i),
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)
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if nil != e {
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return nil, e
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}
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result = append(result, r...)
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}
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}
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return result, nil
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}
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// a.[].b.[].c.[].d
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// g
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// getDataAsSlice 抽取制定深度，生成list
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 12:17 2023/9/2
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func (df *DataFilter) getDataAsSlice(sourceData string, pathList []string) []interface{} {
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//fmt.Println(sourceData, pathList)
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result := make([]interface{}, 0)
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if len(pathList) == 0 {
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return result
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}
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if len(pathList) == 1 {
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return []interface{}{gjson.Get(sourceData, pathList[0]).Value()}
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}
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for idx, itemPath := range pathList {
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if len(pathList)-1 == idx {
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val := gjson.Get(sourceData, itemPath).Value()
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if nil == val {
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return result
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}
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result = append(result, val)
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return result
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}
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currentPathVal := gjson.Get(sourceData, itemPath).Array()
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for _, sonItem := range currentPathVal {
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result = append(result, df.getDataAsSlice(sonItem.String(), pathList[idx:])...)
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}
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}
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return result
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}
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// setValue 设置值
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 22:04 2023/9/1
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func (df *DataFilter) setValue(path string, value interface{}) error {
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var (
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err error
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)
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df.rewriteResult, err = sjson.Set(df.rewriteResult, path, value)
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return err
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}
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// setKV 设置相关值
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 16:03 2023/9/1
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func (df *DataFilter) setKV(rule *FilterDataRule) error {
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var (
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err error
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)
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sourceValue := gjson.Get(df.source, rule.SourceKey)
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if sourceValue.Exists() {
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// 原始数据存在对应路径
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df.rewriteResult, err = sjson.Set(df.rewriteResult, rule.MapKey, sourceValue.Value())
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return err
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}
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if !rule.WithDefault {
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// 路径不存在, 且禁用默认值
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return errors.New(rule.SourceKey + " : source path not found, and default value is forbidden")
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}
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// 使用默认值填充
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df.rewriteResult, err = sjson.Set(df.rewriteResult, rule.MapKey, rule.DefaultValue)
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return err
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}
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// getArrPathList 获取路径列表
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 21:32 2023/9/1
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func (df *DataFilter) getArrPathList(inputPath string) []string {
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pathArr := strings.Split(inputPath, "[]")
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arr := make([]string, 0)
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for _, item := range pathArr {
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arr = append(arr, strings.Trim(item, "."))
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}
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return arr
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}
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// logPrint 打印日志
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 18:00 2023/9/1
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func (df *DataFilter) logPrint(level string, msg string, logAttr ...interface{}) {
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if !df.filterOption.DebugModel {
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// 未开启调试模式
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return
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}
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logData := append([]interface{}{level, msg}, logAttr...)
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log.Println(logData...)
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}
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// 日志等级定义
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const (
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logLevelPanic = "PANIC"
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logLevelFatal = "FATAL"
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logLevelWarn = "WARN"
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logLevelInfo = "INFO"
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logLevelDebug = "DEBUG"
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)
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