move store files to the structure we want

go/store/util/progressreader/reader.go

@@ -0,0 +1,37 @@
+// Copyright 2016 Attic Labs, Inc. All rights reserved.
+// Licensed under the Apache License, version 2.0:
+// http://www.apache.org/licenses/LICENSE-2.0
+
+// Package progressreader provides an io.Reader that reports progress to a callback
+package progressreader
+
+import (
+	"io"
+	"time"
+
+	"github.com/liquidata-inc/ld/dolt/go/store/go/util/status"
+)
+
+type Callback func(seen uint64)
+
+func New(inner io.Reader, cb Callback) io.Reader {
+	return &reader{inner, uint64(0), time.Time{}, cb}
+}
+
+type reader struct {
+	inner    io.Reader
+	seen     uint64
+	lastTime time.Time
+	cb       Callback
+}
+
+func (r *reader) Read(p []byte) (n int, err error) {
+	n, err = r.inner.Read(p)
+	r.seen += uint64(n)
+
+	if now := time.Now(); now.Sub(r.lastTime) >= status.Rate || err == io.EOF {
+		r.cb(r.seen)
+		r.lastTime = now
+	}
+	return
+}