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// Copyright 2015 go-swagger maintainers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package swag
import (
"encoding/json"
"fmt"
"path/filepath"
"strconv"
"github.com/mailru/easyjson/jlexer"
"github.com/mailru/easyjson/jwriter"
yaml "gopkg.in/yaml.v2"
)
// YAMLMatcher matches yaml
func YAMLMatcher(path string) bool {
ext := filepath.Ext(path)
return ext == ".yaml" || ext == ".yml"
}
// YAMLToJSON converts YAML unmarshaled data into json compatible data
func YAMLToJSON(data interface{}) (json.RawMessage, error) {
jm, err := transformData(data)
if err != nil {
return nil, err
}
b, err := WriteJSON(jm)
return json.RawMessage(b), err
}
// BytesToYAMLDoc converts a byte slice into a YAML document
func BytesToYAMLDoc(data []byte) (interface{}, error) {
var canary map[interface{}]interface{} // validate this is an object and not a different type
if err := yaml.Unmarshal(data, &canary); err != nil {
return nil, err
}
var document yaml.MapSlice // preserve order that is present in the document
if err := yaml.Unmarshal(data, &document); err != nil {
return nil, err
}
return document, nil
}
// JSONMapSlice represent a JSON object, with the order of keys maintained
type JSONMapSlice []JSONMapItem
// MarshalJSON renders a JSONMapSlice as JSON
func (s JSONMapSlice) MarshalJSON() ([]byte, error) {
w := &jwriter.Writer{Flags: jwriter.NilMapAsEmpty | jwriter.NilSliceAsEmpty}
s.MarshalEasyJSON(w)
return w.BuildBytes()
}
// MarshalEasyJSON renders a JSONMapSlice as JSON, using easyJSON
func (s JSONMapSlice) MarshalEasyJSON(w *jwriter.Writer) {
w.RawByte('{')
ln := len(s)
last := ln - 1
for i := 0; i < ln; i++ {
s[i].MarshalEasyJSON(w)
if i != last { // last item
w.RawByte(',')
}
}
w.RawByte('}')
}
// UnmarshalJSON makes a JSONMapSlice from JSON
func (s *JSONMapSlice) UnmarshalJSON(data []byte) error {
l := jlexer.Lexer{Data: data}
s.UnmarshalEasyJSON(&l)
return l.Error()
}
// UnmarshalEasyJSON makes a JSONMapSlice from JSON, using easyJSON
func (s *JSONMapSlice) UnmarshalEasyJSON(in *jlexer.Lexer) {
if in.IsNull() {
in.Skip()
return
}
var result JSONMapSlice
in.Delim('{')
for !in.IsDelim('}') {
var mi JSONMapItem
mi.UnmarshalEasyJSON(in)
result = append(result, mi)
}
*s = result
}
// JSONMapItem represents the value of a key in a JSON object held by JSONMapSlice
type JSONMapItem struct {
Key string
Value interface{}
}
// MarshalJSON renders a JSONMapItem as JSON
func (s JSONMapItem) MarshalJSON() ([]byte, error) {
w := &jwriter.Writer{Flags: jwriter.NilMapAsEmpty | jwriter.NilSliceAsEmpty}
s.MarshalEasyJSON(w)
return w.BuildBytes()
}
// MarshalEasyJSON renders a JSONMapItem as JSON, using easyJSON
func (s JSONMapItem) MarshalEasyJSON(w *jwriter.Writer) {
w.String(s.Key)
w.RawByte(':')
w.Raw(WriteJSON(s.Value))
}
// UnmarshalJSON makes a JSONMapItem from JSON
func (s *JSONMapItem) UnmarshalJSON(data []byte) error {
l := jlexer.Lexer{Data: data}
s.UnmarshalEasyJSON(&l)
return l.Error()
}
// UnmarshalEasyJSON makes a JSONMapItem from JSON, using easyJSON
func (s *JSONMapItem) UnmarshalEasyJSON(in *jlexer.Lexer) {
key := in.UnsafeString()
in.WantColon()
value := in.Interface()
in.WantComma()
s.Key = key
s.Value = value
}
func transformData(input interface{}) (out interface{}, err error) {
format := func(t interface{}) (string, error) {
switch k := t.(type) {
case string:
return k, nil
case uint:
return strconv.FormatUint(uint64(k), 10), nil
case uint8:
return strconv.FormatUint(uint64(k), 10), nil
case uint16:
return strconv.FormatUint(uint64(k), 10), nil
case uint32:
return strconv.FormatUint(uint64(k), 10), nil
case uint64:
return strconv.FormatUint(k, 10), nil
case int:
return strconv.Itoa(k), nil
case int8:
return strconv.FormatInt(int64(k), 10), nil
case int16:
return strconv.FormatInt(int64(k), 10), nil
case int32:
return strconv.FormatInt(int64(k), 10), nil
case int64:
return strconv.FormatInt(k, 10), nil
default:
return "", fmt.Errorf("unexpected map key type, got: %T", k)
}
}
switch in := input.(type) {
case yaml.MapSlice:
o := make(JSONMapSlice, len(in))
for i, mi := range in {
var nmi JSONMapItem
if nmi.Key, err = format(mi.Key); err != nil {
return nil, err
}
v, ert := transformData(mi.Value)
if ert != nil {
return nil, ert
}
nmi.Value = v
o[i] = nmi
}
return o, nil
case map[interface{}]interface{}:
o := make(JSONMapSlice, 0, len(in))
for ke, va := range in {
var nmi JSONMapItem
if nmi.Key, err = format(ke); err != nil {
return nil, err
}
v, ert := transformData(va)
if ert != nil {
return nil, ert
}
nmi.Value = v
o = append(o, nmi)
}
return o, nil
case []interface{}:
len1 := len(in)
o := make([]interface{}, len1)
for i := 0; i < len1; i++ {
o[i], err = transformData(in[i])
if err != nil {
return nil, err
}
}
return o, nil
}
return input, nil
}
// YAMLDoc loads a yaml document from either http or a file and converts it to json
func YAMLDoc(path string) (json.RawMessage, error) {
yamlDoc, err := YAMLData(path)
if err != nil {
return nil, err
}
data, err := YAMLToJSON(yamlDoc)
if err != nil {
return nil, err
}
return data, nil
}
// YAMLData loads a yaml document from either http or a file
func YAMLData(path string) (interface{}, error) {
data, err := LoadFromFileOrHTTP(path)
if err != nil {
return nil, err
}
return BytesToYAMLDoc(data)
}
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