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// Copyright 2015 The Hugo Authors. All rights reserved.
//
// 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 parser
import (
"encoding/json"
"errors"
"io"
"github.com/gohugoio/hugo/parser/metadecoders"
toml "github.com/pelletier/go-toml/v2"
yaml "gopkg.in/yaml.v2"
)
const (
yamlDelimLf = "---\n"
tomlDelimLf = "+++\n"
)
func InterfaceToConfig(in interface{}, format metadecoders.Format, w io.Writer) error {
if in == nil {
return errors.New("input was nil")
}
switch format {
case metadecoders.YAML:
b, err := yaml.Marshal(in)
if err != nil {
return err
}
_, err = w.Write(b)
return err
case metadecoders.TOML:
enc := toml.NewEncoder(w)
enc.SetIndentTables(true)
return enc.Encode(in)
case metadecoders.JSON:
b, err := json.MarshalIndent(in, "", " ")
if err != nil {
return err
}
_, err = w.Write(b)
if err != nil {
return err
}
_, err = w.Write([]byte{'\n'})
return err
default:
return errors.New("unsupported Format provided")
}
}
func InterfaceToFrontMatter(in interface{}, format metadecoders.Format, w io.Writer) error {
if in == nil {
return errors.New("input was nil")
}
switch format {
case metadecoders.YAML:
_, err := w.Write([]byte(yamlDelimLf))
if err != nil {
return err
}
err = InterfaceToConfig(in, format, w)
if err != nil {
return err
}
_, err = w.Write([]byte(yamlDelimLf))
return err
case metadecoders.TOML:
_, err := w.Write([]byte(tomlDelimLf))
if err != nil {
return err
}
err = InterfaceToConfig(in, format, w)
if err != nil {
return err
}
_, err = w.Write([]byte("\n" + tomlDelimLf))
return err
default:
return InterfaceToConfig(in, format, w)
}
}
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