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filewriter.go
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filewriter.go
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package filewriter
import (
"bufio"
"io/fs"
"os"
)
//go:generate mockgen -destination mock_filewriter.go -package filewriter github.com/frasnym/go-file-writer-example/filewriter FileWriter
type FileWriter interface {
CreateFile(name string) (*os.File, error)
OpenFile(name string, flag int, perm fs.FileMode) (*os.File, error)
FileWriteString(file *os.File, s string) (n int, err error)
FileWrite(file *os.File, b []byte) (n int, err error)
FileClose(file *os.File) error
NewBufferedWriter(file *os.File) *bufio.Writer
BufferedWriteString(writer *bufio.Writer, s string) (n int, err error)
BufferedFlush(writer *bufio.Writer) error
}
type fileWriter struct{}
func NewFileWriter() FileWriter {
return &fileWriter{}
}
func (r *fileWriter) CreateFile(name string) (*os.File, error) {
return os.Create(name)
}
func (*fileWriter) OpenFile(name string, flag int, perm fs.FileMode) (*os.File, error) {
return os.OpenFile(name, flag, perm)
}
func (*fileWriter) FileWrite(file *os.File, b []byte) (n int, err error) {
return file.Write(b)
}
func (r *fileWriter) FileWriteString(file *os.File, s string) (n int, err error) {
return file.WriteString(s)
}
func (r *fileWriter) FileClose(file *os.File) error {
return file.Close()
}
func (r *fileWriter) NewBufferedWriter(file *os.File) *bufio.Writer {
return bufio.NewWriter(file)
}
func (r *fileWriter) BufferedWriteString(writer *bufio.Writer, s string) (n int, err error) {
return writer.WriteString(s)
}
func (r *fileWriter) BufferedFlush(writer *bufio.Writer) error {
return writer.Flush()
}