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@@ -0,0 +1,133 @@
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+// Copyright (C) 2014 The Syncthing Authors.
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+//
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+// This program is free software: you can redistribute it and/or modify it
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+// under the terms of the GNU General Public License as published by the Free
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+// Software Foundation, either version 3 of the License, or (at your option)
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+// any later version.
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+//
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+// This program is distributed in the hope that it will be useful, but WITHOUT
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+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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+// more details.
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+//
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+// You should have received a copy of the GNU General Public License along
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+// with this program. If not, see <http://www.gnu.org/licenses/>.
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+
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+package stats
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+
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+import (
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+ "encoding/binary"
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+ "time"
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+
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+ "github.com/syndtr/goleveldb/leveldb"
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+)
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+
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+const (
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+ folderStatisticTypeLastFile = iota
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+)
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+
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+var folderStatisticsTypes = []byte{
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+ folderStatisticTypeLastFile,
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+}
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+
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+type FolderStatistics struct {
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+ LastFile *LastFile
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+}
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+
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+type FolderStatisticsReference struct {
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+ db *leveldb.DB
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+ folder string
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+}
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+
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+func NewFolderStatisticsReference(db *leveldb.DB, folder string) *FolderStatisticsReference {
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+ return &FolderStatisticsReference{
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+ db: db,
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+ folder: folder,
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+ }
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+}
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+
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+func (s *FolderStatisticsReference) key(stat byte) []byte {
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+ k := make([]byte, 1+1+64)
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+ k[0] = keyTypeFolderStatistic
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+ k[1] = stat
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+ copy(k[1+1:], s.folder[:])
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+ return k
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+}
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+
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+func (s *FolderStatisticsReference) GetLastFile() *LastFile {
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+ value, err := s.db.Get(s.key(folderStatisticTypeLastFile), nil)
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+ if err != nil {
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+ if err != leveldb.ErrNotFound {
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+ l.Warnln("FolderStatisticsReference: Failed loading last file filename value for", s.folder, ":", err)
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+ }
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+ return nil
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+ }
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+
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+ file := LastFile{}
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+ err = file.UnmarshalBinary(value)
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+ if err != nil {
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+ l.Warnln("FolderStatisticsReference: Failed loading last file value for", s.folder, ":", err)
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+ return nil
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+ }
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+ return &file
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+}
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+
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+func (s *FolderStatisticsReference) ReceivedFile(filename string) {
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+ f := LastFile{
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+ Filename: filename,
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+ At: time.Now(),
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+ }
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+ if debug {
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+ l.Debugln("stats.FolderStatisticsReference.ReceivedFile:", s.folder)
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+ }
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+
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+ value, err := f.MarshalBinary()
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+ if err != nil {
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+ l.Warnln("FolderStatisticsReference: Failed serializing last file value for", s.folder, ":", err)
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+ return
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+ }
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+
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+ err = s.db.Put(s.key(folderStatisticTypeLastFile), value, nil)
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+ if err != nil {
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+ l.Warnln("Failed update last file value for", s.folder, ":", err)
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+ }
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+}
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+
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+// Never called, maybe because it's worth while to keep the data
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+// or maybe because we have no easy way of knowing that a folder has been removed.
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+func (s *FolderStatisticsReference) Delete() error {
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+ for _, stype := range folderStatisticsTypes {
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+ err := s.db.Delete(s.key(stype), nil)
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+ if debug && err == nil {
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+ l.Debugln("stats.FolderStatisticsReference.Delete:", s.folder, stype)
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+ }
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+ if err != nil && err != leveldb.ErrNotFound {
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+ return err
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+ }
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+ }
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+ return nil
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+}
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+
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+func (s *FolderStatisticsReference) GetStatistics() FolderStatistics {
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+ return FolderStatistics{
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+ LastFile: s.GetLastFile(),
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+ }
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+}
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+
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+type LastFile struct {
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+ At time.Time
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+ Filename string
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+}
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+
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+func (f *LastFile) MarshalBinary() ([]byte, error) {
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+ buf := make([]byte, 8+len(f.Filename))
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+ binary.BigEndian.PutUint64(buf[:8], uint64(f.At.Unix()))
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+ copy(buf[8:], []byte(f.Filename))
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+ return buf, nil
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+}
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+
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+func (f *LastFile) UnmarshalBinary(buf []byte) error {
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+ f.At = time.Unix(int64(binary.BigEndian.Uint64(buf[:8])), 0)
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+ f.Filename = string(buf[8:])
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+ return nil
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+}
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Jakob Borg