134 lines
3.4 KiB
Go
134 lines
3.4 KiB
Go
// 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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package stats
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import (
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"encoding/binary"
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"time"
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"github.com/syndtr/goleveldb/leveldb"
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)
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const (
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folderStatisticTypeLastFile = iota
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)
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var folderStatisticsTypes = []byte{
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folderStatisticTypeLastFile,
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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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type FolderStatisticsReference struct {
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db *leveldb.DB
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folder string
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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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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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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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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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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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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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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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// 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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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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type LastFile struct {
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At time.Time
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Filename string
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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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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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