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filestore.go
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filestore.go
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package pdfstore
import (
"errors"
"io/ioutil"
"os"
)
type FileStoreConfig struct {
Path string
Permissions os.FileMode
FileNameGenerator func() string
}
type FileStore struct {
config FileStoreConfig
}
func NewFileStore(config *FileStoreConfig) (*FileStore, error) {
if err := validateConfig(config); err != nil {
return nil, err
}
return &FileStore{config: *config}, nil
}
func validateConfig(config *FileStoreConfig) error {
if len(config.Path) <= 0 {
return ErrEmptyPath
}
if config.FileNameGenerator == nil {
return ErrNilFileNameGenerator
}
return nil
}
func (fs FileStore) Write(buffer []byte) (n int, err error) {
if err = ioutil.WriteFile(fs.config.Path+fs.config.FileNameGenerator(), buffer, fs.config.Permissions); err != nil {
return 0, err
}
return len(buffer), nil
}
// DefaultFileNameGenerator provides function that generates file names in next format
// dd-mm-yyyy-hh-mm-{base64 string of 6 chars}.pdf
func DefaultFileNameGenerator() func() string {
return func() string {
//todo
return "NOT_IMPLEMENTED.pdf"
}
}
var ErrEmptyPath = errors.New("FileStoreConfig.Path must be not empty")
var ErrNilFileNameGenerator = errors.New("FileStoreConfig.FileNameGenerator must be non-nil value")