1package pb
2
3import (
4	"io"
5)
6
7// Reader it's a wrapper for given reader, but with progress handle
8type Reader struct {
9	io.Reader
10	bar *ProgressBar
11}
12
13// Read reads bytes from wrapped reader and add amount of bytes to progress bar
14func (r *Reader) Read(p []byte) (n int, err error) {
15	n, err = r.Reader.Read(p)
16	r.bar.Add(n)
17	return
18}
19
20// Close the wrapped reader when it implements io.Closer
21func (r *Reader) Close() (err error) {
22	r.bar.Finish()
23	if closer, ok := r.Reader.(io.Closer); ok {
24		return closer.Close()
25	}
26	return
27}
28
29// Writer it's a wrapper for given writer, but with progress handle
30type Writer struct {
31	io.Writer
32	bar *ProgressBar
33}
34
35// Write writes bytes to wrapped writer and add amount of bytes to progress bar
36func (r *Writer) Write(p []byte) (n int, err error) {
37	n, err = r.Writer.Write(p)
38	r.bar.Add(n)
39	return
40}
41
42// Close the wrapped reader when it implements io.Closer
43func (r *Writer) Close() (err error) {
44	r.bar.Finish()
45	if closer, ok := r.Writer.(io.Closer); ok {
46		return closer.Close()
47	}
48	return
49}
50