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sanitised.go
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sanitised.go
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// Copyright (c) 2018 Ashley Jeffs
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, sub to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package config
import (
"bytes"
"encoding/json"
"sort"
)
//------------------------------------------------------------------------------
// Sanitised is a general map[string]interface{} type that tries to marshal into
// both YAML and JSON in a way that ensure the 'type' field is always first.
type Sanitised map[string]interface{}
// SanitForYAML a map to be embedded within a parent object for YAML
// marshalling.
type SanitForYAML map[string]interface{}
// MarshalYAML return the config as YAML with the 'type' field first.
func (s Sanitised) MarshalYAML() (interface{}, error) {
dynObj := SanitForYAML{}
var typeVal interface{}
for k, v := range s {
if k == "type" {
typeVal = v
} else {
dynObj[k] = v
}
}
return struct {
Type interface{} `yaml:"type"`
SanitForYAML `yaml:",inline"`
}{
Type: typeVal,
SanitForYAML: dynObj,
}, nil
}
// MarshalJSON return the config as a JSON blob with the 'type' field first.
func (s Sanitised) MarshalJSON() ([]byte, error) {
var keys []string
var typeVal interface{}
for k, v := range s {
if k == "type" {
typeVal = v
} else {
keys = append(keys, k)
}
}
sort.Strings(keys)
var buf bytes.Buffer
buf.WriteByte('{')
if typeVal != nil {
typeBytes, err := json.Marshal(typeVal)
if err != nil {
return nil, err
}
buf.WriteString(`"type":`)
buf.Write(typeBytes)
if len(keys) > 0 {
buf.WriteByte(',')
}
}
for i, k := range keys {
valBytes, err := json.Marshal(s[k])
if err != nil {
return nil, err
}
buf.WriteByte('"')
buf.WriteString(k)
buf.WriteString(`":`)
buf.Write(valBytes)
if i < len(keys)-1 {
buf.WriteByte(',')
}
}
buf.WriteByte('}')
return buf.Bytes(), nil
}
//------------------------------------------------------------------------------