siyuan/kernel/model/repository.go

// SiYuan - Build Your Eternal Digital Garden
// Copyright (c) 2020-present, b3log.org
//
// This program 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.
//
// This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.

package model

import (
	"crypto/rand"
	"encoding/hex"
	"errors"
	"os"
	"time"

	"github.com/88250/gulu"
	"github.com/siyuan-note/dejavu"
	"github.com/siyuan-note/dejavu/entity"
	"github.com/siyuan-note/encryption"
	"github.com/siyuan-note/siyuan/kernel/filesys"
	"github.com/siyuan-note/siyuan/kernel/sql"
	"github.com/siyuan-note/siyuan/kernel/util"
)

func GetRepoIndexLogs(page int) (logs []*dejavu.Log, pageCount, totalCount int, err error) {
	if 1 > len(Conf.Repo.Key) {
		err = errors.New(Conf.Language(26))
		return
	}

	repo, err := dejavu.NewRepo(util.DataDir, util.RepoDir, Conf.Repo.Key)
	if nil != err {
		util.LogErrorf("init repo failed: %s", err)
		return
	}

	page-- // 从 0 开始
	logs, pageCount, totalCount, err = repo.GetIndexLogs(page, 32)
	if nil != err {
		if dejavu.ErrNotFoundIndex == err {
			logs = []*dejavu.Log{}
			err = nil
			return
		}

		util.LogErrorf("get repo index logs failed: %s", err)
		return
	}
	return
}

func ImportRepoKey(hexKey string) (err error) {
	key, err := hex.DecodeString(hexKey)
	if nil != err {
		return
	}
	Conf.Repo.Key = key
	Conf.Save()

	if err = os.RemoveAll(Conf.Repo.GetSaveDir()); nil != err {
		return
	}
	if err = os.MkdirAll(Conf.Repo.GetSaveDir(), 0755); nil != err {
		return
	}
	return
}

func InitRepoKey() (err error) {
	if err = os.RemoveAll(Conf.Repo.GetSaveDir()); nil != err {
		return
	}
	if err = os.MkdirAll(Conf.Repo.GetSaveDir(), 0755); nil != err {
		return
	}

	randomBytes := make([]byte, 16)
	_, err = rand.Read(randomBytes)
	if nil != err {
		return
	}
	password := string(randomBytes)
	randomBytes = make([]byte, 16)
	_, err = rand.Read(randomBytes)
	if nil != err {
		util.LogErrorf("init repo key failed: %s", err)
		return
	}
	salt := string(randomBytes)

	key, err := encryption.KDF(password, salt)
	if nil != err {
		util.LogErrorf("init repo key failed: %s", err)
		return
	}
	Conf.Repo.Key = key
	Conf.Save()
	return
}

var checkoutCallbacks = map[string]dejavu.Callback{
	"walkData": func(context, arg interface{}, err error) {
		context.(func(msg string))(arg.(string))
	},
	"upsertFile": func(context, arg interface{}, err error) {
		context.(func(msg string))(arg.(*entity.File).Path)
	},
	"removeFile": func(context, arg interface{}, err error) {
		context.(func(msg string))(arg.(string))
	},
}

func CheckoutRepo(id string) (err error) {
	if 1 > len(Conf.Repo.Key) {
		err = errors.New(Conf.Language(26))
		return
	}

	repo, err := dejavu.NewRepo(util.DataDir, util.RepoDir, Conf.Repo.Key)
	if nil != err {
		util.LogErrorf("init repo failed: %s", err)
		return
	}

	util.PushEndlessProgress(Conf.Language(63))
	writingDataLock.Lock()
	defer writingDataLock.Unlock()
	WaitForWritingFiles()
	sql.WaitForWritingDatabase()
	filesys.ReleaseAllFileLocks()
	CloseWatchAssets()
	defer WatchAssets()

	// 恢复快照时自动暂停同步，避免刚刚恢复后的数据又被同步覆盖
	syncEnabled := Conf.Sync.Enabled
	Conf.Sync.Enabled = false
	Conf.Save()

	err = repo.Checkout(id, util.PushEndlessProgress, checkoutCallbacks)
	if nil != err {
		util.PushClearProgress()
		return
	}

	RefreshFileTree()
	if syncEnabled {
		func() {
			time.Sleep(5 * time.Second)
			util.PushMsg(Conf.Language(134), 0)
		}()
	}
	return
}

var indexCallbacks = map[string]dejavu.Callback{
	"walkData": func(context, arg interface{}, err error) {
		context.(func(msg string))(arg.(string))
	},
	"getLatestFile": func(context, arg interface{}, err error) {
		context.(func(msg string))(arg.(*entity.File).Path)
	},
	"upsertFile": func(context, arg interface{}, err error) {
		context.(func(msg string))(arg.(*entity.File).Path)
	},
}

func IndexRepo(memo string) (err error) {
	if 1 > len(Conf.Repo.Key) {
		err = errors.New(Conf.Language(26))
		return
	}

	memo = gulu.Str.RemoveInvisible(memo)
	if "" == memo {
		err = errors.New(Conf.Language(142))
		return
	}

	repo, err := dejavu.NewRepo(util.DataDir, util.RepoDir, Conf.Repo.Key)
	if nil != err {
		util.LogErrorf("init repo failed: %s", err)
		return
	}

	util.PushEndlessProgress(Conf.Language(143))
	writingDataLock.Lock()
	defer writingDataLock.Unlock()
	WaitForWritingFiles()
	sql.WaitForWritingDatabase()
	filesys.ReleaseAllFileLocks()

	_, err = repo.Index(memo, util.PushEndlessProgress, indexCallbacks)
	util.PushClearProgress()
	return
}