wechaty/go-wechaty

package filebox

import (
    "encoding/base64"
    "fmt"
    "io"
    "strings"
)

var _ fileImplInterface = &fileBoxBase64{}

type fileBoxBase64 struct {
    base64Data string
}

func newFileBoxBase64(base64Data string) *fileBoxBase64 {
    return &fileBoxBase64{base64Data: base64Data}
}

func (fb *fileBoxBase64) toJSONMap() (map[string]interface{}, error) {
    if fb.base64Data == "" {
        return nil, fmt.Errorf("fileBoxBase64.toJSONMap %w", ErrNoBase64Data)
    }

    return map[string]interface{}{
        "base64": fb.base64Data,
    }, nil
}

func (fb *fileBoxBase64) toBytes() ([]byte, error) { //nolint:unused
    dec, err := base64.StdEncoding.DecodeString(fb.base64Data)
    if err != nil {
        return nil, err
    }
    return dec, nil
}

func (fb *fileBoxBase64) toReader() (io.Reader, error) {
    reader := base64.NewDecoder(base64.StdEncoding, strings.NewReader(fb.base64Data))
    return reader, nil
}