package storage import ( "go/weather/pkg/logger" "io" "io/fs" "os" "go.uber.org/zap" ) //s3Storage classe used to store oi.Reader to s3 type fileStorage struct { logger *logger.WeatherLogger filename string } //NewFileStorage instanciate storage object func NewFileStorage(log *logger.WeatherLogger, filename string) Storage { s3 := fileStorage{ logger: log, filename: filename, } return &s3 } //Store send data to s3 bucket func (ss *fileStorage) Store(content io.Reader) { b, err := io.ReadAll(content) ss.handleError(err) err = AppendFile(ss.filename, append(b, "\n"...), fs.ModeAppend) ss.handleError(err) } //AppendFile add line to an existing file func AppendFile(filename string, data []byte, perm fs.FileMode) error { f, err := os.OpenFile(filename, os.O_APPEND|os.O_WRONLY, perm) if err != nil { return err } _, err = f.Write(data) if err1 := f.Close(); err1 != nil && err == nil { err = err1 } return err } //handleError generic fatal error func (ss *fileStorage) handleError(err error) { if err != nil { ss.logger.Fatal("Storage error", zap.Error(err)) } }