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// 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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"github.com/pkg/errors"
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"github.com/tidwall/gjson"
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"github.com/tidwall/sjson"
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"strings"
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2023-02-12 18:26:27 +08:00
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)
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2023-08-31 21:06:35 +08:00
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const (
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virtualRoot = "__virtual__root"
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)
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2023-02-12 18:26:27 +08:00
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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) *DataFilter {
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return &DataFilter{
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source: source,
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filterRule: filterRule,
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rewriteResult: "{}",
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}
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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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}
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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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var (
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err error
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)
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for _, itemRule := range df.filterRule {
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if !df.isArrPath(itemRule.SourceKey) && !df.isArrPath(itemRule.MapKey) {
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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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}
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}
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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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2023-09-01 16:26:17 +08:00
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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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// 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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2023-09-01 16:26:17 +08:00
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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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