87 lines
2.4 KiB
Go
87 lines
2.4 KiB
Go
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// Copyright (C) 2020 Storj Labs, Inc.
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// See LICENSE for copying information.
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package objectdeletion
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import (
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"errors"
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"strconv"
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"strings"
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"github.com/zeebo/errs"
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"storj.io/common/storj"
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"storj.io/common/uuid"
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)
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// ObjectIdentifier contains information about an object
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// that are needed for delete operation.
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type ObjectIdentifier struct {
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ProjectID uuid.UUID
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Bucket []byte
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EncryptedPath []byte
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}
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// SegmentPath returns a raw path for a specific segment index.
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func (id *ObjectIdentifier) SegmentPath(segmentIndex int64) ([]byte, error) {
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if segmentIndex < lastSegmentIndex {
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return nil, errors.New("invalid segment index")
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}
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segment := "l"
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if segmentIndex > lastSegmentIndex {
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segment = "s" + strconv.FormatInt(segmentIndex, 10)
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}
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return []byte(storj.JoinPaths(
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id.ProjectID.String(),
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segment,
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string(id.Bucket),
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string(id.EncryptedPath),
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)), nil
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}
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// ParseSegmentPath parses a raw path and returns an
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// object identifier from that path along with the path's segment index.
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// example: <project-id>/01/<bucket-name>/<encrypted-path>
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func ParseSegmentPath(rawPath []byte) (ObjectIdentifier, int64, error) {
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elements := storj.SplitPath(string(rawPath))
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if len(elements) < 4 {
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return ObjectIdentifier{}, -1, errs.New("invalid path %q", string(rawPath))
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}
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projectID, err := uuid.FromString(elements[0])
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if err != nil {
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return ObjectIdentifier{}, -1, errs.Wrap(err)
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}
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var segmentIndex int64
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if elements[1] == "l" {
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segmentIndex = lastSegmentIndex
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} else {
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segmentIndex, err = strconv.ParseInt(elements[1][1:], 10, 64) // remove the strng `s` from segment index we got
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if err != nil {
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return ObjectIdentifier{}, -1, errs.Wrap(err)
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}
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}
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return ObjectIdentifier{
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ProjectID: projectID,
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Bucket: []byte(elements[2]),
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EncryptedPath: []byte(storj.JoinPaths(elements[3:]...)),
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}, segmentIndex, nil
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}
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// Key returns a string concatenated by all object identifier fields plus 0.
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// It's a unique string used to identify an object.
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// It's not a valid key for retrieving pointers from metainfo database.
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func (id *ObjectIdentifier) Key() string {
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builder := strings.Builder{}
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// we don't need the return value here
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// Write will always return the length of the argument and nil error
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_, _ = builder.Write(id.ProjectID[:])
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_, _ = builder.Write(id.Bucket)
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_, _ = builder.Write(id.EncryptedPath)
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return builder.String()
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}
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