feat: add support for auto backup db file

api/v1/system_setting.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"strconv"
 	"strings"
 
 	"github.com/labstack/echo/v4"
@@ -39,6 +40,8 @@ const (
 	SystemSettingMemoDisplayWithUpdatedTsName SystemSettingName = "memo-display-with-updated-ts"
 	// SystemSettingOpenAIConfigName is the name of OpenAI config.
 	SystemSettingOpenAIConfigName SystemSettingName = "openai-config"
+	// SystemSettingAutoBackupIntervalName is the name of auto backup interval as seconds.
+	SystemSettingAutoBackupIntervalName SystemSettingName = "auto-backup-interval"
 )
 
 // CustomizedProfile is the struct definition for SystemSettingCustomizedProfileName system setting item.
@@ -139,6 +142,20 @@ func (upsert UpsertSystemSettingRequest) Validate() error {
 		if err := json.Unmarshal([]byte(upsert.Value), &value); err != nil {
 			return fmt.Errorf(systemSettingUnmarshalError, settingName)
 		}
+	case SystemSettingAutoBackupIntervalName:
+		var value string
+		if err := json.Unmarshal([]byte(upsert.Value), &value); err != nil {
+			return fmt.Errorf(systemSettingUnmarshalError, settingName)
+		}
+		if value != "" {
+			v, err := strconv.Atoi(value)
+			if err != nil {
+				return fmt.Errorf(systemSettingUnmarshalError, settingName)
+			}
+			if v < 0 {
+				return fmt.Errorf("backup interval should > 0")
+			}
+		}
 	case SystemSettingTelegramBotTokenName:
 		if upsert.Value == "" {
 			return nil

go.mod

@@ -25,7 +25,7 @@ require (
 	golang.org/x/mod v0.8.0
 	golang.org/x/net v0.7.0
 	golang.org/x/oauth2 v0.5.0
-	modernc.org/sqlite v1.22.1
+	modernc.org/sqlite v1.24.0
 )
 
 require (

go.sum

@@ -662,8 +662,8 @@ modernc.org/memory v1.5.0 h1:N+/8c5rE6EqugZwHii4IFsaJ7MUhoWX07J5tC/iI5Ds=
 modernc.org/memory v1.5.0/go.mod h1:PkUhL0Mugw21sHPeskwZW4D6VscE/GQJOnIpCnW6pSU=
 modernc.org/opt v0.1.3 h1:3XOZf2yznlhC+ibLltsDGzABUGVx8J6pnFMS3E4dcq4=
 modernc.org/opt v0.1.3/go.mod h1:WdSiB5evDcignE70guQKxYUl14mgWtbClRi5wmkkTX0=
-modernc.org/sqlite v1.22.1 h1:P2+Dhp5FR1RlVRkQ3dDfCiv3Ok8XPxqpe70IjYVA9oE=
-modernc.org/sqlite v1.22.1/go.mod h1:OrDj17Mggn6MhE+iPbBNf7RGKODDE9NFT0f3EwDzJqk=
+modernc.org/sqlite v1.24.0 h1:EsClRIWHGhLTCX44p+Ri/JLD+vFGo0QGjasg2/F9TlI=
+modernc.org/sqlite v1.24.0/go.mod h1:OrDj17Mggn6MhE+iPbBNf7RGKODDE9NFT0f3EwDzJqk=
 modernc.org/strutil v1.1.3 h1:fNMm+oJklMGYfU9Ylcywl0CO5O6nTfaowNsh2wpPjzY=
 modernc.org/strutil v1.1.3/go.mod h1:MEHNA7PdEnEwLvspRMtWTNnp2nnyvMfkimT1NKNAGbw=
 modernc.org/tcl v1.15.2 h1:C4ybAYCGJw968e+Me18oW55kD/FexcHbqH2xak1ROSY=

server/backup.go

@@ -0,0 +1,48 @@
+package server
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+	"time"
+
+	apiv1 "github.com/usememos/memos/api/v1"
+	"github.com/usememos/memos/common/log"
+	"github.com/usememos/memos/store"
+	"go.uber.org/zap"
+)
+
+func autoBackup(ctx context.Context, s *store.Store) {
+	intervalStr := s.GetSystemSettingValueWithDefault(&ctx, apiv1.SystemSettingAutoBackupIntervalName.String(), "")
+	if intervalStr == "" {
+		log.Info("no SystemSettingAutoBackupIntervalName setting, disable auto backup")
+		return
+	}
+
+	interval, err := strconv.Atoi(intervalStr)
+	if err != nil || interval <= 0 {
+		log.Error(fmt.Sprintf("invalid SystemSettingAutoBackupIntervalName value %s, disable auto backup", intervalStr), zap.Error(err))
+		return
+	}
+
+	log.Info("enable auto backup every " + intervalStr + " seconds")
+	ticker := time.NewTicker(time.Duration(interval) * time.Second)
+	defer ticker.Stop()
+
+	var t time.Time
+	for {
+		select {
+		case <-ctx.Done():
+			log.Info("stop auto backup graceful.")
+			return
+		case t = <-ticker.C:
+		}
+
+		filename := s.Profile.DSN + t.Format("-20060102-150405.bak")
+		log.Info(fmt.Sprintf("create backup to %s", filename))
+		err := s.BackupTo(ctx, filename)
+		if err != nil {
+			log.Error("fail to create backup", zap.Error(err))
+		}
+	}
+}

server/server.go

@@ -103,6 +103,7 @@ func (s *Server) Start(ctx context.Context) error {
 	}
 
 	go s.telegramBot.Start(ctx)
+	go autoBackup(ctx, s.Store)
 
 	return s.e.Start(fmt.Sprintf(":%d", s.Profile.Port))
 }

store/store.go

@@ -3,9 +3,11 @@ package store
 import (
 	"context"
 	"database/sql"
+	"fmt"
 	"sync"
 
 	"github.com/usememos/memos/server/profile"
+	"modernc.org/sqlite"
 )
 
 // Store provides database access to all raw objects.
@@ -31,6 +33,43 @@ func (s *Store) GetDB() *sql.DB {
 	return s.db
 }
 
+func (s *Store) BackupTo(ctx context.Context, filename string) error {
+	conn, err := s.db.Conn(ctx)
+	if err != nil {
+		return fmt.Errorf("fail to get conn %s", err)
+	}
+	defer conn.Close()
+
+	err = conn.Raw(func(driverConn any) error {
+		type backuper interface {
+			NewBackup(string) (*sqlite.Backup, error)
+		}
+		backupConn, ok := driverConn.(backuper)
+		if !ok {
+			return fmt.Errorf("db connection is not a sqlite backuper")
+		}
+
+		bck, err := backupConn.NewBackup(filename)
+		if err != nil {
+			return fmt.Errorf("fail to create sqlite backup %s", err)
+		}
+
+		for more := true; more; {
+			more, err = bck.Step(-1)
+			if err != nil {
+				return fmt.Errorf("fail to execute sqlite backup %s", err)
+			}
+		}
+
+		return bck.Finish()
+	})
+	if err != nil {
+		return fmt.Errorf("fail to backup %s", err)
+	}
+
+	return nil
+}
+
 func (s *Store) Vacuum(ctx context.Context) error {
 	tx, err := s.db.BeginTx(ctx, nil)
 	if err != nil {