mirror of
https://github.com/go-gitea/gitea.git
synced 2024-11-30 10:05:10 +01:00
9f31f3aa8a
* Add an abstract json layout to make it's easier to change json library * Fix import * Fix import sequence * Fix blank lines * Fix blank lines
65 lines
1.9 KiB
Go
65 lines
1.9 KiB
Go
// 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 storage
|
|
|
|
import (
|
|
"reflect"
|
|
|
|
"code.gitea.io/gitea/modules/json"
|
|
)
|
|
|
|
// Mappable represents an interface that can MapTo another interface
|
|
type Mappable interface {
|
|
MapTo(v interface{}) error
|
|
}
|
|
|
|
// 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) {
|
|
// First of all check if we've got the same type as the exemplar - if so it's all fine.
|
|
if reflect.TypeOf(cfg).AssignableTo(reflect.TypeOf(exemplar)) {
|
|
return cfg, nil
|
|
}
|
|
|
|
// Now if not - does it provide a MapTo function we can try?
|
|
if mappable, ok := cfg.(Mappable); ok {
|
|
newVal := reflect.New(reflect.TypeOf(exemplar))
|
|
if err := mappable.MapTo(newVal.Interface()); err == nil {
|
|
return newVal.Elem().Interface(), nil
|
|
}
|
|
// MapTo has failed us ... let's try the json route ...
|
|
}
|
|
|
|
// OK we've been passed a byte array right?
|
|
configBytes, ok := cfg.([]byte)
|
|
if !ok {
|
|
// oh ... it's a string then?
|
|
var configStr string
|
|
|
|
configStr, ok = cfg.(string)
|
|
configBytes = []byte(configStr)
|
|
}
|
|
if !ok {
|
|
// hmm ... can we marshal it to json?
|
|
var err error
|
|
configBytes, err = json.Marshal(cfg)
|
|
ok = err == nil
|
|
}
|
|
if !ok {
|
|
// no ... we've tried hard enough at this point - throw an error!
|
|
return nil, ErrInvalidConfiguration{cfg: cfg}
|
|
}
|
|
|
|
// OK unmarshal the byte array into a new copy of the exemplar
|
|
newVal := reflect.New(reflect.TypeOf(exemplar))
|
|
if err := json.Unmarshal(configBytes, newVal.Interface()); err != nil {
|
|
// If we can't unmarshal it then return an error!
|
|
return nil, ErrInvalidConfiguration{cfg: cfg, err: err}
|
|
}
|
|
return newVal.Elem().Interface(), nil
|
|
}
|