// Package yamlutil contains utility types which are useful for dealing with the
// yaml package.
package yamlutil

import (
	"encoding/base64"
)

// Blob encodes and decodes a byte slice as a standard base-64 encoded yaml
// string.
type Blob []byte

func (b Blob) String() string {
	return base64.StdEncoding.EncodeToString([]byte(b))
}

// MarshalYAML implements the yaml.Marshaler interface.
func (b Blob) MarshalYAML() (interface{}, error) {
	return base64.StdEncoding.EncodeToString([]byte(b)), nil
}

// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (b *Blob) UnmarshalYAML(unmarshal func(interface{}) error) error {
	var b64 string
	if err := unmarshal(&b64); err != nil {
		return err
	}

	b64Dec, err := base64.StdEncoding.DecodeString(b64)
	if err != nil {
		return err
	}

	*b = b64Dec
	return nil
}