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package model
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import (
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"errors"
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"github.com/HFO4/cloudreve/pkg/util"
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"github.com/jinzhu/gorm"
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"path"
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"time"
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)
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// Folder 目录
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type Folder struct {
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// 表字段
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gorm.Model
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Name string `gorm:"unique_index:idx_only_one_name"`
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ParentID *uint `gorm:"index:parent_id;unique_index:idx_only_one_name"`
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OwnerID uint `gorm:"index:owner_id"`
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PolicyID uint // Webdav下挂载的存储策略ID
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// 数据库忽略字段
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Position string `gorm:"-"`
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}
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// Create 创建目录
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func (folder *Folder) Create() (uint, error) {
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if err := DB.Create(folder).Error; err != nil {
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util.Log().Warning("无法插入目录记录, %s", err)
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return 0, err
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}
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return folder.ID, nil
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}
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// GetChild 返回folder下名为name的子目录，不存在则返回错误
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func (folder *Folder) GetChild(name string) (*Folder, error) {
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var resFolder Folder
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err := DB.
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Where("parent_id = ? AND owner_id = ? AND name = ?", folder.ID, folder.OwnerID, name).
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First(&resFolder).Error
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// 将子目录的路径传递下去
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if err == nil {
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resFolder.Position = path.Join(folder.Position, folder.Name)
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}
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return &resFolder, err
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}
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// GetChildFolder 查找子目录
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func (folder *Folder) GetChildFolder() ([]Folder, error) {
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var folders []Folder
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result := DB.Where("parent_id = ?", folder.ID).Find(&folders)
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if result.Error == nil {
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for i := 0; i < len(folders); i++ {
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folders[i].Position = path.Join(folder.Position, folder.Name)
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}
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}
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return folders, result.Error
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}
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// GetRecursiveChildFolder 查找所有递归子目录，包括自身
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func GetRecursiveChildFolder(dirs []uint, uid uint, includeSelf bool) ([]Folder, error) {
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folders := make([]Folder, 0, len(dirs))
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var err error
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var parFolders []Folder
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result := DB.Where("owner_id = ? and id in (?)", uid, dirs).Find(&parFolders)
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if result.Error != nil {
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return folders, err
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}
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// 整理父目录的ID
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var parentIDs = make([]uint, 0, len(parFolders))
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for _, folder := range parFolders {
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parentIDs = append(parentIDs, folder.ID)
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}
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if includeSelf {
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// 合并至最终结果
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folders = append(folders, parFolders...)
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}
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parFolders = []Folder{}
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// 递归查询子目录,最大递归65535次
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for i := 0; i < 65535; i++ {
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result = DB.Where("owner_id = ? and parent_id in (?)", uid, parentIDs).Find(&parFolders)
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// 查询结束条件
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if len(parFolders) == 0 {
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break
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}
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// 整理父目录的ID
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parentIDs = make([]uint, 0, len(parFolders))
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for _, folder := range parFolders {
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parentIDs = append(parentIDs, folder.ID)
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}
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// 合并至最终结果
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folders = append(folders, parFolders...)
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parFolders = []Folder{}
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}
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return folders, err
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}
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// DeleteFolderByIDs 根据给定ID批量删除目录记录
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func DeleteFolderByIDs(ids []uint) error {
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result := DB.Where("id in (?)", ids).Unscoped().Delete(&Folder{})
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return result.Error
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}
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// GetFoldersByIDs 根据ID和用户查找所有目录
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func GetFoldersByIDs(ids []uint, uid uint) ([]Folder, error) {
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var folders []Folder
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result := DB.Where("id in (?) AND owner_id = ?", ids, uid).Find(&folders)
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return folders, result.Error
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}
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// MoveOrCopyFileTo 将此目录下的files移动或复制至dstFolder，
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// 返回此操作新增的容量
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func (folder *Folder) MoveOrCopyFileTo(files []uint, dstFolder *Folder, isCopy bool) (uint64, error) {
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// 已复制文件的总大小
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var copiedSize uint64
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if isCopy {
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// 检索出要复制的文件
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var originFiles = make([]File, 0, len(files))
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if err := DB.Where(
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"id in (?) and user_id = ? and folder_id = ?",
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files,
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folder.OwnerID,
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folder.ID,
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).Find(&originFiles).Error; err != nil {
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return 0, err
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}
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// 复制文件记录
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for _, oldFile := range originFiles {
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oldFile.Model = gorm.Model{}
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oldFile.FolderID = dstFolder.ID
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oldFile.UserID = dstFolder.OwnerID
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if err := DB.Create(&oldFile).Error; err != nil {
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return copiedSize, err
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}
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copiedSize += oldFile.Size
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}
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} else {
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// 更改顶级要移动文件的父目录指向
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err := DB.Model(File{}).Where(
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"id in (?) and user_id = ? and folder_id = ?",
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files,
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folder.OwnerID,
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folder.ID,
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).
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Update(map[string]interface{}{
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"folder_id": dstFolder.ID,
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}).
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Error
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if err != nil {
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return 0, err
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}
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}
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return copiedSize, nil
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}
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// CopyFolderTo 将此目录及其子目录及文件递归复制至dstFolder
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// 返回此操作新增的容量
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func (folder *Folder) CopyFolderTo(folderID uint, dstFolder *Folder) (size uint64, err error) {
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// 列出所有子目录
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subFolders, err := GetRecursiveChildFolder([]uint{folderID}, folder.OwnerID, true)
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if err != nil {
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return 0, err
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}
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// 抽离所有子目录的ID
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var subFolderIDs = make([]uint, len(subFolders))
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for key, value := range subFolders {
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subFolderIDs[key] = value.ID
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}
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// 复制子目录
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var newIDCache = make(map[uint]uint)
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for _, folder := range subFolders {
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// 新的父目录指向
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var newID uint
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// 顶级目录直接指向新的目的目录
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if folder.ID == folderID {
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newID = dstFolder.ID
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} else if IDCache, ok := newIDCache[*folder.ParentID]; ok {
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newID = IDCache
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} else {
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util.Log().Warning("无法取得新的父目录:%d", folder.ParentID)
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return size, errors.New("无法取得新的父目录")
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}
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// 插入新的目录记录
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oldID := folder.ID
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folder.Model = gorm.Model{}
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folder.ParentID = &newID
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folder.OwnerID = dstFolder.OwnerID
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if err = DB.Create(&folder).Error; err != nil {
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return size, err
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}
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// 记录新的ID以便其子目录使用
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newIDCache[oldID] = folder.ID
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}
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// 复制文件
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var originFiles = make([]File, 0, len(subFolderIDs))
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if err := DB.Where(
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"user_id = ? and folder_id in (?)",
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folder.OwnerID,
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subFolderIDs,
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).Find(&originFiles).Error; err != nil {
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return 0, err
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}
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// 复制文件记录
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for _, oldFile := range originFiles {
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oldFile.Model = gorm.Model{}
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oldFile.FolderID = newIDCache[oldFile.FolderID]
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oldFile.UserID = dstFolder.OwnerID
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if err := DB.Create(&oldFile).Error; err != nil {
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return size, err
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}
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size += oldFile.Size
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}
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return size, nil
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}
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// MoveFolderTo 将folder目录下的dirs子目录复制或移动到dstFolder，
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// 返回此过程中增加的容量
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func (folder *Folder) MoveFolderTo(dirs []uint, dstFolder *Folder) error {
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// 更改顶级要移动目录的父目录指向
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err := DB.Model(Folder{}).Where(
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"id in (?) and owner_id = ? and parent_id = ?",
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dirs,
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folder.OwnerID,
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folder.ID,
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).Update(map[string]interface{}{
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"parent_id": dstFolder.ID,
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}).Error
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return err
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}
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// Rename 重命名目录
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func (folder *Folder) Rename(new string) error {
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if err := DB.Model(&folder).Update("name", new).Error; err != nil {
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return err
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}
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return nil
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}
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/*
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实现 FileInfo.FileInfo 接口
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TODO 测试
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*/
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func (folder *Folder) GetName() string {
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return folder.Name
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}
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func (folder *Folder) GetSize() uint64 {
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return 0
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}
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func (folder *Folder) ModTime() time.Time {
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return folder.UpdatedAt
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}
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func (folder *Folder) IsDir() bool {
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return true
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}
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func (folder *Folder) GetPosition() string {
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return folder.Position
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}
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