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- // Copyright 2020 The Gitea Authors. All rights reserved.
- // Use of this source code is governed by a MIT-style
- // license that can be found in the LICENSE file.
-
- package queue
-
- import (
- "encoding/json"
- "reflect"
- )
-
- // toConfig will attempt to convert a given configuration cfg into the provided exemplar type.
- //
- // It will tolerate the cfg being passed as a []byte or string of a json representation of the
- // exemplar or the correct type of the exemplar itself
- func toConfig(exemplar, cfg interface{}) (interface{}, error) {
- if reflect.TypeOf(cfg).AssignableTo(reflect.TypeOf(exemplar)) {
- return cfg, nil
- }
-
- configBytes, ok := cfg.([]byte)
- if !ok {
- configStr, ok := cfg.(string)
- if !ok {
- return nil, ErrInvalidConfiguration{cfg: cfg}
- }
- configBytes = []byte(configStr)
- }
- newVal := reflect.New(reflect.TypeOf(exemplar))
- if err := json.Unmarshal(configBytes, newVal.Interface()); err != nil {
- return nil, ErrInvalidConfiguration{cfg: cfg, err: err}
- }
- return newVal.Elem().Interface(), nil
- }
-
- // unmarshalAs will attempt to unmarshal provided bytes as the provided exemplar
- func unmarshalAs(bs []byte, exemplar interface{}) (data Data, err error) {
- if exemplar != nil {
- t := reflect.TypeOf(exemplar)
- n := reflect.New(t)
- ne := n.Elem()
- err = json.Unmarshal(bs, ne.Addr().Interface())
- data = ne.Interface().(Data)
- } else {
- err = json.Unmarshal(bs, &data)
- }
-
- return
- }
-
- // assignableTo will check if provided data is assignable to the same type as the exemplar
- // if the provided exemplar is nil then it will always return true
- func assignableTo(data Data, exemplar interface{}) bool {
- if exemplar == nil {
- return true
- }
-
- // Assert data is of same type as exemplar
- t := reflect.TypeOf(data)
- exemplarType := reflect.TypeOf(exemplar)
-
- return t.AssignableTo(exemplarType) && data != nil
- }
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