50 lines
1.0 KiB
Go
50 lines
1.0 KiB
Go
package pb
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import (
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"io"
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)
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// Reader it's a wrapper for given reader, but with progress handle
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type Reader struct {
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io.Reader
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bar *ProgressBar
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}
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// Read reads bytes from wrapped reader and add amount of bytes to progress bar
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func (r *Reader) Read(p []byte) (n int, err error) {
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n, err = r.Reader.Read(p)
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r.bar.Add(n)
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return
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}
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// Close the wrapped reader when it implements io.Closer
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func (r *Reader) Close() (err error) {
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r.bar.Finish()
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if closer, ok := r.Reader.(io.Closer); ok {
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return closer.Close()
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}
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return
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}
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// Writer it's a wrapper for given writer, but with progress handle
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type Writer struct {
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io.Writer
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bar *ProgressBar
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}
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// Write writes bytes to wrapped writer and add amount of bytes to progress bar
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func (r *Writer) Write(p []byte) (n int, err error) {
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n, err = r.Writer.Write(p)
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r.bar.Add(n)
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return
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}
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// Close the wrapped reader when it implements io.Closer
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func (r *Writer) Close() (err error) {
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r.bar.Finish()
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if closer, ok := r.Writer.(io.Closer); ok {
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return closer.Close()
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}
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return
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}
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