61 lines
1.2 KiB
Go
61 lines
1.2 KiB
Go
package conf
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import (
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"bytes"
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"encoding/json"
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"reflect"
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"strings"
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)
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var optionalGlobalValuesType = func() reflect.Type {
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var fields []reflect.StructField
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rt := reflect.TypeOf(Conf{})
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nf := rt.NumField()
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for i := 0; i < nf; i++ {
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f := rt.Field(i)
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j := f.Tag.Get("json")
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if j != "-" && j != "pathDefaults" && j != "paths" {
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if !strings.Contains(j, ",omitempty") {
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j += ",omitempty"
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}
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typ := f.Type
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if typ.Kind() != reflect.Pointer {
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typ = reflect.PtrTo(typ)
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}
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fields = append(fields, reflect.StructField{
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Name: f.Name,
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Type: typ,
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Tag: reflect.StructTag(`json:"` + j + `"`),
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})
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}
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}
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return reflect.StructOf(fields)
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}()
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func newOptionalGlobalValues() interface{} {
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return reflect.New(optionalGlobalValuesType).Interface()
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}
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// OptionalGlobal is a Conf whose values can all be optional.
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type OptionalGlobal struct {
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Values interface{}
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}
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// UnmarshalJSON implements json.Unmarshaler.
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func (p *OptionalGlobal) UnmarshalJSON(b []byte) error {
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p.Values = newOptionalGlobalValues()
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d := json.NewDecoder(bytes.NewReader(b))
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d.DisallowUnknownFields()
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return d.Decode(p.Values)
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}
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// MarshalJSON implements json.Marshaler.
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func (p *OptionalGlobal) MarshalJSON() ([]byte, error) {
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return json.Marshal(p.Values)
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}
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