Feat: use database transactions to delete / update file size

models/file.go

@@ -3,6 +3,7 @@ package model
 import (
 	"encoding/gob"
 	"encoding/json"
+	"errors"
 	"path"
 	"time"
 
@@ -200,10 +201,35 @@ func RemoveFilesWithSoftLinks(files []File) ([]File, error) {
 
 }
 
-// DeleteFileByIDs 根据给定ID批量删除文件记录
-func DeleteFileByIDs(ids []uint) error {
-	result := DB.Where("id in (?)", ids).Unscoped().Delete(&File{})
-	return result.Error
+// DeleteFiles 批量删除文件记录并归还容量
+func DeleteFiles(files []*File, uid uint) error {
+	tx := DB.Begin()
+	user := &User{}
+	user.ID = uid
+	var size uint64
+	for _, file := range files {
+		if file.UserID != uid {
+			tx.Rollback()
+			return errors.New("User id not consistent")
+		}
+
+		result := tx.Unscoped().Delete(file)
+		if result.RowsAffected != 0 {
+			size += file.Size
+		}
+
+		if result.Error != nil {
+			tx.Rollback()
+			return result.Error
+		}
+	}
+
+	if err := user.ChangeStorage(tx, "-", size); err != nil {
+		tx.Rollback()
+		return err
+	}
+
+	return tx.Commit().Error
 }
 
 // GetFilesByParentIDs 根据父目录ID查找文件
@@ -232,7 +258,29 @@ func (file *File) UpdatePicInfo(value string) error {
 
 // UpdateSize 更新文件的大小信息
 func (file *File) UpdateSize(value uint64) error {
-	return DB.Model(&file).Set("gorm:association_autoupdate", false).Update("size", value).Error
+	tx := DB.Begin()
+	var sizeDelta uint64
+	operator := "+"
+	user := User{}
+	user.ID = file.UserID
+	if value > file.Size {
+		sizeDelta = value - file.Size
+	} else {
+		operator = "-"
+		sizeDelta = file.Size - value
+	}
+
+	if res := tx.Model(&file).Set("gorm:association_autoupdate", false).Update("size", value); res.Error != nil {
+		tx.Rollback()
+		return res.Error
+	}
+
+	if err := user.ChangeStorage(tx, operator, sizeDelta); err != nil {
+		tx.Rollback()
+		return err
+	}
+
+	return tx.Commit().Error
 }
 
 // UpdateSourceName 更新文件的源文件名

models/user.go

@@ -89,6 +89,11 @@ func (user *User) IncreaseStorage(size uint64) bool {
 	return false
 }
 
+// ChangeStorage 更新用户容量
+func (user *User) ChangeStorage(tx *gorm.DB, operator string, size uint64) error {
+	return tx.Model(user).Update("storage", gorm.Expr("storage "+operator+" ?", size)).Error
+}
+
 // IncreaseStorageWithoutCheck 忽略可用容量，增加用户已用容量
 func (user *User) IncreaseStorageWithoutCheck(size uint64) {
 	if size == 0 {

pkg/filesystem/hooks.go

@@ -133,19 +133,15 @@ func HookValidateCapacityWithoutIncrease(ctx context.Context, fs *FileSystem, fi
 	return nil
 }
 
-// HookChangeCapacity 根据原有文件和新文件的大小更新用户容量
-func HookChangeCapacity(ctx context.Context, fs *FileSystem, newFile fsctx.FileHeader) error {
+// HookValidateCapacityDiff 根据原有文件和新文件的大小验证用户容量
+func HookValidateCapacityDiff(ctx context.Context, fs *FileSystem, newFile fsctx.FileHeader) error {
 	originFile := ctx.Value(fsctx.FileModelCtx).(model.File)
 	newFileSize := newFile.Info().Size
 
 	if newFileSize > originFile.Size {
-		if !fs.ValidateCapacity(ctx, newFileSize-originFile.Size) {
-			return ErrInsufficientCapacity
-		}
-		return nil
+		return HookValidateCapacityWithoutIncrease(ctx, fs, newFile)
 	}
 
-	fs.User.DeductionStorage(originFile.Size - newFileSize)
 	return nil
 }
 

pkg/filesystem/manage.go

@@ -122,15 +122,12 @@ func (fs *FileSystem) Move(ctx context.Context, dirs, files []uint, src, dst str
 
 // Delete 递归删除对象, force 为 true 时强制删除文件记录，忽略物理删除是否成功
 func (fs *FileSystem) Delete(ctx context.Context, dirs, files []uint, force bool) error {
-	// 已删除的总容量,map用于去重
-	var deletedStorage = make(map[uint]uint64)
-	var totalStorage = make(map[uint]uint64)
 	// 已删除的文件ID
-	var deletedFileIDs = make([]uint, 0, len(fs.FileTarget))
+	var deletedFiles = make([]*model.File, 0, len(fs.FileTarget))
 	// 删除失败的文件的父目录ID
 
 	// 所有文件的ID
-	var allFileIDs = make([]uint, 0, len(fs.FileTarget))
+	var allFiles = make([]*model.File, 0, len(fs.FileTarget))
 
 	// 列出要删除的目录
 	if len(dirs) > 0 {
@@ -164,39 +161,35 @@ func (fs *FileSystem) Delete(ctx context.Context, dirs, files []uint, force bool
 	for i := 0; i < len(fs.FileTarget); i++ {
 		if !util.ContainsString(failed[fs.FileTarget[i].PolicyID], fs.FileTarget[i].SourceName) {
 			// 已成功删除的文件
-			deletedFileIDs = append(deletedFileIDs, fs.FileTarget[i].ID)
-			deletedStorage[fs.FileTarget[i].ID] = fs.FileTarget[i].Size
+			deletedFiles = append(deletedFiles, &fs.FileTarget[i])
 		}
+
 		// 全部文件
-		totalStorage[fs.FileTarget[i].ID] = fs.FileTarget[i].Size
-		allFileIDs = append(allFileIDs, fs.FileTarget[i].ID)
+		allFiles = append(allFiles, &fs.FileTarget[i])
 	}
 
 	// 如果强制删除，则将全部文件视为删除成功
 	if force {
-		deletedFileIDs = allFileIDs
-		deletedStorage = totalStorage
+		deletedFiles = allFiles
 	}
 
 	// 删除文件记录
-	err = model.DeleteFileByIDs(deletedFileIDs)
+	err = model.DeleteFiles(deletedFiles, fs.User.ID)
 	if err != nil {
 		return ErrDBDeleteObjects.WithError(err)
 	}
 
 	// 删除文件记录对应的分享记录
 	// TODO 先取消分享再删除文件
-	model.DeleteShareBySourceIDs(deletedFileIDs, false)
-
-	// 归还容量
-	var total uint64
-	for _, value := range deletedStorage {
-		total += value
+	deletedFileIDs := make([]uint, len(deletedFiles))
+	for k, file := range deletedFiles {
+		deletedFileIDs[k] = file.ID
 	}
-	fs.User.DeductionStorage(total)
+
+	model.DeleteShareBySourceIDs(deletedFileIDs, false)
 
 	// 如果文件全部删除成功，继续删除目录
-	if len(deletedFileIDs) == len(allFileIDs) {
+	if len(deletedFiles) == len(allFiles) {
 		var allFolderIDs = make([]uint, 0, len(fs.DirTarget))
 		for _, value := range fs.DirTarget {
 			allFolderIDs = append(allFolderIDs, value.ID)
@@ -210,7 +203,7 @@ func (fs *FileSystem) Delete(ctx context.Context, dirs, files []uint, force bool
 		model.DeleteShareBySourceIDs(allFolderIDs, true)
 	}
 
-	if notDeleted := len(fs.FileTarget) - len(deletedFileIDs); notDeleted > 0 {
+	if notDeleted := len(fs.FileTarget) - len(deletedFiles); notDeleted > 0 {
 		return serializer.NewError(
 			serializer.CodeNotFullySuccess,
 			fmt.Sprintf("有 %d 个文件未能成功删除", notDeleted),

pkg/webdav/webdav.go

@@ -349,15 +349,13 @@ func (h *Handler) handlePut(w http.ResponseWriter, r *http.Request, fs *filesyst
 
 		fs.Use("BeforeUpload", filesystem.HookResetPolicy)
 		fs.Use("BeforeUpload", filesystem.HookValidateFile)
-		fs.Use("BeforeUpload", filesystem.HookChangeCapacity)
+		fs.Use("BeforeUpload", filesystem.HookValidateCapacityDiff)
 		fs.Use("AfterUploadCanceled", filesystem.HookCleanFileContent)
 		fs.Use("AfterUploadCanceled", filesystem.HookClearFileSize)
-		fs.Use("AfterUploadCanceled", filesystem.HookGiveBackCapacity)
 		fs.Use("AfterUploadCanceled", filesystem.HookCancelContext)
 		fs.Use("AfterUpload", filesystem.GenericAfterUpdate)
 		fs.Use("AfterValidateFailed", filesystem.HookCleanFileContent)
 		fs.Use("AfterValidateFailed", filesystem.HookClearFileSize)
-		fs.Use("AfterValidateFailed", filesystem.HookGiveBackCapacity)
 		ctx = context.WithValue(ctx, fsctx.FileModelCtx, *originFile)
 	} else {
 		// 给文件系统分配钩子

service/explorer/file.go

@@ -405,14 +405,12 @@ func (service *FileIDService) PutContent(ctx context.Context, c *gin.Context) se
 	// 给文件系统分配钩子
 	fs.Use("BeforeUpload", filesystem.HookResetPolicy)
 	fs.Use("BeforeUpload", filesystem.HookValidateFile)
-	fs.Use("BeforeUpload", filesystem.HookChangeCapacity)
+	fs.Use("BeforeUpload", filesystem.HookValidateCapacityDiff)
 	fs.Use("AfterUploadCanceled", filesystem.HookCleanFileContent)
 	fs.Use("AfterUploadCanceled", filesystem.HookClearFileSize)
-	fs.Use("AfterUploadCanceled", filesystem.HookGiveBackCapacity)
 	fs.Use("AfterUpload", filesystem.GenericAfterUpdate)
 	fs.Use("AfterValidateFailed", filesystem.HookCleanFileContent)
 	fs.Use("AfterValidateFailed", filesystem.HookClearFileSize)
-	fs.Use("AfterValidateFailed", filesystem.HookGiveBackCapacity)
 
 	// 执行上传
 	uploadCtx = context.WithValue(uploadCtx, fsctx.FileModelCtx, originFile[0])