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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package s3
import (
"os"
"path/filepath"
"github.com/aws/aws-sdk-go/service/s3/s3manager"
)
type fileIterator struct {
filePaths []string
bucket string
subFolder string
next struct {
path string
f *os.File
}
err error
}
func makeFileIterator(files []string, bucket string, targetFolder string) s3manager.BatchUploadIterator {
return &fileIterator{
filePaths: files,
bucket: bucket,
subFolder: targetFolder,
}
}
func (iter *fileIterator) Next() bool {
if len(iter.filePaths) == 0 {
iter.next.f = nil
return false
}
f, err := os.Open(iter.filePaths[0])
iter.err = err
iter.next.f = f
iter.next.path = filepath.Join(iter.subFolder, filepath.Base(iter.filePaths[0]))
iter.filePaths = iter.filePaths[1:]
return iter.Err() == nil
}
// Err returns an error that was set during opening the file
func (iter *fileIterator) Err() error {
return iter.err
}
// UploadObject returns a BatchUploadObject and sets the After field to
// close the file.
func (iter *fileIterator) UploadObject() s3manager.BatchUploadObject {
f := iter.next.f
return s3manager.BatchUploadObject{
Object: &s3manager.UploadInput{
Bucket: &iter.bucket,
Key: &iter.next.path,
Body: f,
},
// After was introduced in version 1.10.7
After: func() error {
return f.Close()
},
}
}
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