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package storage
import (
"bytes"
"fmt"
"github.com/tomwright/dasel/v2"
"github.com/tomwright/dasel/v2/dencoding"
"github.com/tomwright/dasel/v2/util"
"io"
)
func init() {
registerReadParser([]string{"yaml", "yml"}, []string{".yaml", ".yml"}, &YAMLParser{})
registerWriteParser([]string{"yaml", "yml"}, []string{".yaml", ".yml"}, &YAMLParser{})
}
// YAMLParser is a Parser implementation to handle yaml files.
type YAMLParser struct {
}
// FromBytes returns some data that is represented by the given bytes.
func (p *YAMLParser) FromBytes(byteData []byte, options ...ReadWriteOption) (dasel.Value, error) {
res := make([]interface{}, 0)
decoder := dencoding.NewYAMLDecoder(bytes.NewReader(byteData))
docLoop:
for {
var docData interface{}
if err := decoder.Decode(&docData); err != nil {
if err == io.EOF {
break docLoop
}
return dasel.Value{}, fmt.Errorf("could not unmarshal data: %w", err)
}
formattedDocData := cleanupYamlMapValue(docData)
res = append(res, formattedDocData)
}
switch len(res) {
case 0:
return dasel.Value{}, nil
case 1:
return dasel.ValueOf(res[0]).WithMetadata("isSingleDocument", true), nil
default:
return dasel.ValueOf(res).WithMetadata("isMultiDocument", true), nil
}
}
func cleanupYamlInterfaceArray(in []interface{}) []interface{} {
res := make([]interface{}, len(in))
for i, v := range in {
res[i] = cleanupYamlMapValue(v)
}
return res
}
func cleanupYamlInterfaceMap(in map[interface{}]interface{}) map[string]interface{} {
res := make(map[string]interface{})
for k, v := range in {
res[util.ToString(k)] = cleanupYamlMapValue(v)
}
return res
}
func cleanupYamlMapValue(v interface{}) interface{} {
switch v := v.(type) {
case []interface{}:
return cleanupYamlInterfaceArray(v)
case map[interface{}]interface{}:
return cleanupYamlInterfaceMap(v)
case string:
return v
default:
return v
}
}
// ToBytes returns a slice of bytes that represents the given value.
func (p *YAMLParser) ToBytes(value dasel.Value, options ...ReadWriteOption) ([]byte, error) {
buffer := new(bytes.Buffer)
colourise := false
encoderOptions := make([]dencoding.YAMLEncoderOption, 0)
for _, o := range options {
switch o.Key {
case OptionColourise:
if value, ok := o.Value.(bool); ok {
colourise = value
}
case OptionIndent:
if value, ok := o.Value.(string); ok {
encoderOptions = append(encoderOptions, dencoding.YAMLEncodeIndent(len(value)))
}
}
}
encoder := dencoding.NewYAMLEncoder(buffer, encoderOptions...)
defer encoder.Close()
switch {
case value.Metadata("isSingleDocument") == true:
if err := encoder.Encode(value.Interface()); err != nil {
return nil, fmt.Errorf("could not encode single document: %w", err)
}
case value.Metadata("isMultiDocument") == true:
for i := 0; i < value.Len(); i++ {
if err := encoder.Encode(value.Index(i).Interface()); err != nil {
return nil, fmt.Errorf("could not encode multi document [%d]: %w", i, err)
}
}
default:
if err := encoder.Encode(value.Interface()); err != nil {
return nil, fmt.Errorf("could not encode default document type: %w", err)
}
}
if colourise {
if err := ColouriseBuffer(buffer, "yaml"); err != nil {
return nil, fmt.Errorf("could not colourise output: %w", err)
}
}
return buffer.Bytes(), nil
}
|
