mirror of
https://github.com/langhuihui/monibuca.git
synced 2025-09-26 23:05:55 +08:00
391 lines
8.6 KiB
Go
391 lines
8.6 KiB
Go
package config
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import (
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"encoding/json"
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"fmt"
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"github.com/mcuadros/go-defaults"
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"log/slog"
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"maps"
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"os"
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"reflect"
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"regexp"
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"strings"
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"time"
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"gopkg.in/yaml.v3"
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)
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type Config struct {
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Ptr reflect.Value //指向配置结构体值,优先级：动态修改值>环境变量>配置文件>defaultYaml>全局配置>默认值
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Modify any //动态修改的值
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Env any //环境变量中的值
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File any //配置文件中的值
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Global *Config //全局配置中的值,指针类型
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Default any //默认值
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Enum []struct {
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Label string `json:"label"`
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Value any `json:"value"`
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}
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name string // 小写
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propsMap map[string]*Config
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props []*Config
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tag reflect.StructTag
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}
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var (
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durationType = reflect.TypeOf(time.Duration(0))
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regexpType = reflect.TypeOf(Regexp{})
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)
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func (config *Config) Range(f func(key string, value Config)) {
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if m, ok := config.GetValue().(map[string]Config); ok {
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for k, v := range m {
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f(k, v)
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}
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}
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}
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func (config *Config) IsMap() bool {
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_, ok := config.GetValue().(map[string]Config)
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return ok
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}
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func (config *Config) Get(key string) (v *Config) {
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if config.propsMap == nil {
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config.propsMap = make(map[string]*Config)
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}
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key = strings.ToLower(key)
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if v, ok := config.propsMap[key]; ok {
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return v
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} else {
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v = &Config{
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name: key,
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}
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config.propsMap[key] = v
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config.props = append(config.props, v)
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return v
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}
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}
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func (config *Config) Has(key string) (ok bool) {
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if config.propsMap == nil {
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return false
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}
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_, ok = config.propsMap[strings.ToLower(key)]
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return ok
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}
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func (config *Config) MarshalJSON() ([]byte, error) {
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if config.propsMap == nil {
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return json.Marshal(config.GetValue())
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}
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return json.Marshal(config.propsMap)
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}
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func (config *Config) GetValue() any {
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return config.Ptr.Interface()
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}
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// Parse 第一步读取配置结构体的默认值
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func (config *Config) Parse(s any, prefix ...string) {
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var t reflect.Type
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var v reflect.Value
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if vv, ok := s.(reflect.Value); ok {
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t, v = vv.Type(), vv
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} else {
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t, v = reflect.TypeOf(s), reflect.ValueOf(s)
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}
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if t.Kind() == reflect.Pointer {
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t, v = t.Elem(), v.Elem()
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}
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config.Ptr = v
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config.Default = v.Interface()
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if l := len(prefix); l > 0 { // 读取环境变量
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name := strings.ToLower(prefix[l-1])
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if tag := config.tag.Get("default"); tag != "" {
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v.Set(config.assign(name, tag))
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config.Default = v.Interface()
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}
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if envValue := os.Getenv(strings.Join(prefix, "_")); envValue != "" {
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v.Set(config.assign(name, envValue))
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config.Env = v.Interface()
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}
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}
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if t.Kind() == reflect.Struct && t != regexpType {
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for i, j := 0, t.NumField(); i < j; i++ {
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ft, fv := t.Field(i), v.Field(i)
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if !ft.IsExported() {
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continue
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}
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name := strings.ToLower(ft.Name)
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if name == "plugin" {
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continue
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}
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if tag := ft.Tag.Get("yaml"); tag != "" {
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if tag == "-" {
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continue
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}
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name, _, _ = strings.Cut(tag, ",")
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}
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prop := config.Get(name)
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prop.tag = ft.Tag
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if len(prefix) > 0 {
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prop.Parse(fv, append(prefix, strings.ToUpper(ft.Name))...)
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} else {
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prop.Parse(fv)
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}
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for _, kv := range strings.Split(ft.Tag.Get("enum"), ",") {
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kvs := strings.Split(kv, ":")
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if len(kvs) != 2 {
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continue
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}
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var tmp struct {
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Value any
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}
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yaml.Unmarshal([]byte(fmt.Sprintf("value: %s", strings.TrimSpace(kvs[0]))), &tmp)
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prop.Enum = append(prop.Enum, struct {
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Label string `json:"label"`
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Value any `json:"value"`
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}{
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Label: strings.TrimSpace(kvs[1]),
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Value: tmp.Value,
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})
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}
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}
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}
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}
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// ParseDefaultYaml 第二步读取全局配置
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func (config *Config) ParseGlobal(g *Config) {
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config.Global = g
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if config.propsMap != nil {
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for k, v := range config.propsMap {
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v.ParseGlobal(g.Get(k))
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}
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} else {
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config.Ptr.Set(g.Ptr)
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}
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}
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// ParseDefaultYaml 第三步读取内嵌默认配置
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func (config *Config) ParseDefaultYaml(defaultYaml map[string]any) {
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if defaultYaml == nil {
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return
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}
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for k, v := range defaultYaml {
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if config.Has(k) {
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if prop := config.Get(k); prop.props != nil {
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if v != nil {
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prop.ParseDefaultYaml(v.(map[string]any))
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}
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} else {
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dv := prop.assign(k, v)
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prop.Default = dv.Interface()
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if prop.Env == nil {
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prop.Ptr.Set(dv)
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}
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}
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}
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}
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}
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// ParseFile 第四步读取用户配置文件
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func (config *Config) ParseUserFile(conf map[string]any) {
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if conf == nil {
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return
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}
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config.File = conf
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for k, v := range conf {
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if config.Has(k) {
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if prop := config.Get(k); prop.props != nil {
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if v != nil {
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switch vv := v.(type) {
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case map[string]any:
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prop.ParseUserFile(vv)
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default:
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prop.props[0].Ptr.Set(reflect.ValueOf(v))
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}
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}
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} else {
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fv := prop.assign(k, v)
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prop.File = fv.Interface()
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if prop.Env == nil {
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prop.Ptr.Set(fv)
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}
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}
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}
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}
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}
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// ParseModifyFile 第五步读取动态修改配置文件
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func (config *Config) ParseModifyFile(conf map[string]any) {
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if conf == nil {
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return
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}
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config.Modify = conf
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for k, v := range conf {
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if config.Has(k) {
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if prop := config.Get(k); prop.props != nil {
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if v != nil {
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vmap := v.(map[string]any)
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prop.ParseModifyFile(vmap)
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if len(vmap) == 0 {
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delete(conf, k)
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}
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}
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} else {
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mv := prop.assign(k, v)
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v = mv.Interface()
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vwm := prop.valueWithoutModify()
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if equal(vwm, v) {
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delete(conf, k)
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if prop.Modify != nil {
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prop.Modify = nil
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prop.Ptr.Set(reflect.ValueOf(vwm))
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}
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continue
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}
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prop.Modify = v
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prop.Ptr.Set(mv)
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}
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}
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}
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if len(conf) == 0 {
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config.Modify = nil
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}
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}
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func (config *Config) valueWithoutModify() any {
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if config.Env != nil {
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return config.Env
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}
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if config.File != nil {
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return config.File
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}
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if config.Global != nil {
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return config.Global.GetValue()
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}
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return config.Default
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}
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func equal(vwm, v any) bool {
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switch ft := reflect.TypeOf(vwm); ft {
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case regexpType:
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return vwm.(Regexp).String() == v.(Regexp).String()
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default:
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switch ft.Kind() {
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case reflect.Slice, reflect.Array, reflect.Map:
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return reflect.DeepEqual(vwm, v)
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}
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return vwm == v
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}
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}
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func (config *Config) GetMap() map[string]any {
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m := make(map[string]any)
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for k, v := range config.propsMap {
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if v.props != nil {
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if vv := v.GetMap(); vv != nil {
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m[k] = vv
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}
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} else if v.GetValue() != nil {
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m[k] = v.GetValue()
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}
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}
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if len(m) > 0 {
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return m
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}
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return nil
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}
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var regexPureNumber = regexp.MustCompile(`^\d+$`)
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func (config *Config) assign(k string, v any) (target reflect.Value) {
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ft := config.Ptr.Type()
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source := reflect.ValueOf(v)
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switch ft {
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case durationType:
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target = reflect.New(ft).Elem()
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if source.Type() == durationType {
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target.Set(source)
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} else if source.IsZero() || !source.IsValid() {
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target.SetInt(0)
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} else {
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timeStr := source.String()
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if d, err := time.ParseDuration(timeStr); err == nil && !regexPureNumber.MatchString(timeStr) {
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target.SetInt(int64(d))
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} else {
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slog.Error("invalid duration value please add unit (s,m,h,d)，eg: 100ms, 10s, 4m, 1h", "key", k, "value", source)
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os.Exit(1)
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}
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}
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case regexpType:
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target = reflect.New(ft).Elem()
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regexpStr := source.String()
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target.Set(reflect.ValueOf(Regexp{regexp.MustCompile(regexpStr)}))
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default:
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if ft.Kind() == reflect.Map {
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target = reflect.MakeMap(ft)
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if v != nil {
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tmpStruct := reflect.StructOf([]reflect.StructField{
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{
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Name: "Key",
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Type: ft.Key(),
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},
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})
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tmpValue := reflect.New(tmpStruct)
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for k, v := range v.(map[string]any) {
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_ = yaml.Unmarshal([]byte(fmt.Sprintf("key: %s", k)), tmpValue.Interface())
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var value reflect.Value
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if ft.Elem().Kind() == reflect.Struct {
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value = reflect.New(ft.Elem())
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defaults.SetDefaults(value.Interface())
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if reflect.TypeOf(v).Kind() != reflect.Map {
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value.Elem().Field(0).Set(reflect.ValueOf(v))
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} else {
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out, _ := yaml.Marshal(v)
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_ = yaml.Unmarshal(out, value.Interface())
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}
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value = value.Elem()
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} else {
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value = reflect.ValueOf(v)
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}
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target.SetMapIndex(tmpValue.Elem().Field(0), value)
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}
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}
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} else {
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tmpStruct := reflect.StructOf([]reflect.StructField{
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{
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Name: strings.ToUpper(k),
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Type: ft,
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},
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})
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tmpValue := reflect.New(tmpStruct)
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if v != nil {
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var out []byte
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if vv, ok := v.(string); ok {
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out = []byte(fmt.Sprintf("%s: %s", k, vv))
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} else {
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out, _ = yaml.Marshal(map[string]any{k: v})
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}
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_ = yaml.Unmarshal(out, tmpValue.Interface())
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}
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target = tmpValue.Elem().Field(0)
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}
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}
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return
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}
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func Parse(target any, conf map[string]any) {
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var c Config
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c.Parse(target)
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c.ParseModifyFile(maps.Clone(conf))
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}
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