mirror of
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55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// Copyright 2019 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// This file incorporates work covered by the following copyright and
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// permission notice:
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//
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// Copyright 2016 Attic Labs, Inc. All rights reserved.
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// Licensed under the Apache License, version 2.0:
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// http://www.apache.org/licenses/LICENSE-2.0
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// Package progressreader provides an io.Reader that reports progress to a callback
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package progressreader
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import (
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"io"
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"time"
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"github.com/dolthub/dolt/go/store/util/status"
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)
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type Callback func(seen uint64)
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func New(inner io.Reader, cb Callback) io.Reader {
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return &reader{inner, uint64(0), time.Time{}, cb}
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}
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type reader struct {
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inner io.Reader
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seen uint64
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lastTime time.Time
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cb Callback
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}
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func (r *reader) Read(p []byte) (n int, err error) {
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n, err = r.inner.Read(p)
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r.seen += uint64(n)
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if now := time.Now(); now.Sub(r.lastTime) >= status.Rate || err == io.EOF {
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r.cb(r.seen)
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r.lastTime = now
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}
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return
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}
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