yq/pkg/yqlib/decoder_json.go
Mike Farah 23d3d962e0 Refactored decoder responsibilities
- improved comment handling
- yaml decoder now responsible for leading content work around
2022-10-28 14:05:20 +11:00

88 lines
1.9 KiB
Go

package yqlib
import (
"fmt"
"io"
"github.com/goccy/go-json"
yaml "gopkg.in/yaml.v3"
)
type jsonDecoder struct {
decoder json.Decoder
}
func NewJSONDecoder() Decoder {
return &jsonDecoder{}
}
func (dec *jsonDecoder) Init(reader io.Reader) error {
dec.decoder = *json.NewDecoder(reader)
return nil
}
func (dec *jsonDecoder) Decode() (*CandidateNode, error) {
var dataBucket orderedMap
log.Debug("going to decode")
err := dec.decoder.Decode(&dataBucket)
if err != nil {
return nil, err
}
node, err := dec.convertToYamlNode(&dataBucket)
if err != nil {
return nil, err
}
return &CandidateNode{
Node: &yaml.Node{
Kind: yaml.DocumentNode,
Content: []*yaml.Node{node},
},
}, nil
}
func (dec *jsonDecoder) convertToYamlNode(data *orderedMap) (*yaml.Node, error) {
if data.kv == nil {
switch rawData := data.altVal.(type) {
case nil:
return createScalarNode(nil, "null"), nil
case float64, float32:
// json decoder returns ints as float.
return parseSnippet(fmt.Sprintf("%v", rawData))
case int, int64, int32, string, bool:
return createScalarNode(rawData, fmt.Sprintf("%v", rawData)), nil
case []*orderedMap:
return dec.parseArray(rawData)
default:
return nil, fmt.Errorf("unrecognised type :( %v", rawData)
}
}
var yamlMap = &yaml.Node{Kind: yaml.MappingNode}
for _, keyValuePair := range data.kv {
yamlValue, err := dec.convertToYamlNode(&keyValuePair.V)
if err != nil {
return nil, err
}
yamlMap.Content = append(yamlMap.Content, createScalarNode(keyValuePair.K, keyValuePair.K), yamlValue)
}
return yamlMap, nil
}
func (dec *jsonDecoder) parseArray(dataArray []*orderedMap) (*yaml.Node, error) {
var yamlMap = &yaml.Node{Kind: yaml.SequenceNode}
for _, value := range dataArray {
yamlValue, err := dec.convertToYamlNode(value)
if err != nil {
return nil, err
}
yamlMap.Content = append(yamlMap.Content, yamlValue)
}
return yamlMap, nil
}