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package model
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import (
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"encoding/gob"
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"encoding/json"
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"errors"
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"path"
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"time"
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"github.com/cloudreve/Cloudreve/v3/pkg/util"
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"github.com/jinzhu/gorm"
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)
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// File 文件
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type File 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"`
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SourceName string `gorm:"type:text"`
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UserID uint `gorm:"index:user_id;unique_index:idx_only_one"`
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Size uint64
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PicInfo string
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FolderID uint `gorm:"index:folder_id;unique_index:idx_only_one"`
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PolicyID uint
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UploadSessionID *string `gorm:"index:session_id;unique_index:session_only_one"`
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Metadata string `gorm:"type:text"`
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// 关联模型
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Policy Policy `gorm:"PRELOAD:false,association_autoupdate:false"`
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// 数据库忽略字段
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Position string `gorm:"-"`
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MetadataSerialized map[string]string `gorm:"-"`
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}
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func init() {
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// 注册缓存用到的复杂结构
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gob.Register(File{})
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}
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// Create 创建文件记录
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func (file *File) Create() error {
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tx := DB.Begin()
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if err := tx.Create(file).Error; err != nil {
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util.Log().Warning("无法插入文件记录, %s", err)
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tx.Rollback()
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return err
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}
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user := &User{}
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user.ID = file.UserID
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if err := user.ChangeStorage(tx, "+", file.Size); err != nil {
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tx.Rollback()
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return err
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}
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return tx.Commit().Error
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}
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// AfterFind 找到文件后的钩子
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func (file *File) AfterFind() (err error) {
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// 反序列化文件元数据
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if file.Metadata != "" {
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err = json.Unmarshal([]byte(file.Metadata), &file.MetadataSerialized)
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}
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return
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}
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// BeforeSave Save策略前的钩子
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func (file *File) BeforeSave() (err error) {
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metaValue, err := json.Marshal(&file.MetadataSerialized)
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file.Metadata = string(metaValue)
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return err
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}
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// GetChildFile 查找目录下名为name的子文件
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func (folder *Folder) GetChildFile(name string) (*File, error) {
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var file File
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result := DB.Where("folder_id = ? AND name = ?", folder.ID, name).Find(&file)
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if result.Error == nil {
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file.Position = path.Join(folder.Position, folder.Name)
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}
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return &file, result.Error
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}
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// GetChildFiles 查找目录下子文件
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func (folder *Folder) GetChildFiles() ([]File, error) {
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var files []File
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result := DB.Where("folder_id = ?", folder.ID).Find(&files)
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if result.Error == nil {
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for i := 0; i < len(files); i++ {
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files[i].Position = path.Join(folder.Position, folder.Name)
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}
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}
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return files, result.Error
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}
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// GetFilesByIDs 根据文件ID批量获取文件,
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// UID为0表示忽略用户，只根据文件ID检索
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func GetFilesByIDs(ids []uint, uid uint) ([]File, error) {
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var files []File
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var result *gorm.DB
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if uid == 0 {
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result = DB.Where("id in (?)", ids).Find(&files)
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} else {
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result = DB.Where("id in (?) AND user_id = ?", ids, uid).Find(&files)
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}
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return files, result.Error
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}
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// GetFilesByKeywords 根据关键字搜索文件,
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// UID为0表示忽略用户，只根据文件ID检索
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func GetFilesByKeywords(uid uint, keywords ...interface{}) ([]File, error) {
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var (
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files []File
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result = DB
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conditions string
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)
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// 生成查询条件
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for i := 0; i < len(keywords); i++ {
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conditions += "name like ?"
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if i != len(keywords)-1 {
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conditions += " or "
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}
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}
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if uid != 0 {
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result = result.Where("user_id = ?", uid)
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}
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result = result.Where("("+conditions+")", keywords...).Find(&files)
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return files, result.Error
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}
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// GetChildFilesOfFolders 批量检索目录子文件
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func GetChildFilesOfFolders(folders *[]Folder) ([]File, error) {
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// 将所有待删除目录ID抽离，以便检索文件
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folderIDs := make([]uint, 0, len(*folders))
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for _, value := range *folders {
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folderIDs = append(folderIDs, value.ID)
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}
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// 检索文件
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var files []File
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result := DB.Where("folder_id in (?)", folderIDs).Find(&files)
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return files, result.Error
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}
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// GetUploadPlaceholderFiles 获取所有上传占位文件
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// UID为0表示忽略用户
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func GetUploadPlaceholderFiles(uid uint) []*File {
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query := DB
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if uid != 0 {
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query = query.Where("user_id = ?", uid)
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}
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var files []*File
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query.Where("upload_session_id is not NULL").Find(&files)
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return files
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}
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// GetPolicy 获取文件所属策略
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func (file *File) GetPolicy() *Policy {
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if file.Policy.Model.ID == 0 {
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file.Policy, _ = GetPolicyByID(file.PolicyID)
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}
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return &file.Policy
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}
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// RemoveFilesWithSoftLinks 去除给定的文件列表中有软链接的文件
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func RemoveFilesWithSoftLinks(files []File) ([]File, error) {
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// 结果值
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filteredFiles := make([]File, 0)
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// 查询软链接的文件
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var filesWithSoftLinks []File
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tx := DB
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for _, value := range files {
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tx = tx.Or("source_name = ? and policy_id = ? and id != ?", value.SourceName, value.PolicyID, value.ID)
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}
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result := tx.Find(&filesWithSoftLinks)
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if result.Error != nil {
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return nil, result.Error
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}
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// 过滤具有软连接的文件
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// TODO: 优化复杂度
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if len(filesWithSoftLinks) == 0 {
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filteredFiles = files
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} else {
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for i := 0; i < len(files); i++ {
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finder := false
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for _, value := range filesWithSoftLinks {
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if value.PolicyID == files[i].PolicyID && value.SourceName == files[i].SourceName {
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finder = true
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break
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}
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}
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if !finder {
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filteredFiles = append(filteredFiles, files[i])
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}
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}
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}
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return filteredFiles, nil
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}
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// DeleteFiles 批量删除文件记录并归还容量
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func DeleteFiles(files []*File, uid uint) error {
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tx := DB.Begin()
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user := &User{}
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user.ID = uid
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var size uint64
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for _, file := range files {
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if file.UserID != uid {
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tx.Rollback()
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return errors.New("user id not consistent")
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}
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result := tx.Unscoped().Where("size = ?", file.Size).Delete(file)
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if result.Error != nil {
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tx.Rollback()
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return result.Error
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}
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if result.RowsAffected == 0 {
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tx.Rollback()
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return errors.New("file size is dirty")
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}
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size += file.Size
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}
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if err := user.ChangeStorage(tx, "-", size); err != nil {
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tx.Rollback()
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return err
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}
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return tx.Commit().Error
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}
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// GetFilesByParentIDs 根据父目录ID查找文件
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func GetFilesByParentIDs(ids []uint, uid uint) ([]File, error) {
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files := make([]File, 0, len(ids))
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result := DB.Where("user_id = ? and folder_id in (?)", uid, ids).Find(&files)
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return files, result.Error
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}
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// GetFilesByUploadSession 查找上传会话对应的文件
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func GetFilesByUploadSession(sessionID string, uid uint) (*File, error) {
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file := File{}
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result := DB.Where("user_id = ? and upload_session_id = ?", uid, sessionID).Find(&file)
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return &file, result.Error
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}
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// Rename 重命名文件
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func (file *File) Rename(new string) error {
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return DB.Model(&file).Update("name", new).Error
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}
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// UpdatePicInfo 更新文件的图像信息
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func (file *File) UpdatePicInfo(value string) error {
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return DB.Model(&file).Set("gorm:association_autoupdate", false).UpdateColumns(File{PicInfo: value}).Error
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}
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// UpdateSize 更新文件的大小信息
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// TODO: 全局锁
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func (file *File) UpdateSize(value uint64) error {
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tx := DB.Begin()
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var sizeDelta uint64
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operator := "+"
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user := User{}
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user.ID = file.UserID
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if value > file.Size {
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sizeDelta = value - file.Size
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} else {
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operator = "-"
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sizeDelta = file.Size - value
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}
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if res := tx.Model(&file).
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Where("size = ?", file.Size).
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Set("gorm:association_autoupdate", false).
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Update("size", value); res.Error != nil {
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tx.Rollback()
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return res.Error
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}
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if err := user.ChangeStorage(tx, operator, sizeDelta); err != nil {
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tx.Rollback()
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return err
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}
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file.Size = value
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return tx.Commit().Error
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}
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// UpdateSourceName 更新文件的源文件名
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func (file *File) UpdateSourceName(value string) error {
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return DB.Model(&file).Set("gorm:association_autoupdate", false).Update("source_name", value).Error
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}
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func (file *File) PopChunkToFile(lastModified *time.Time, picInfo string) error {
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file.UploadSessionID = nil
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if lastModified != nil {
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file.UpdatedAt = *lastModified
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}
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return DB.Model(file).UpdateColumns(map[string]interface{}{
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"upload_session_id": file.UploadSessionID,
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"updated_at": file.UpdatedAt,
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"pic_info": picInfo,
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}).Error
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}
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// CanCopy 返回文件是否可被复制
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func (file *File) CanCopy() bool {
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return file.UploadSessionID == nil
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}
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/*
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实现 webdav.FileInfo 接口
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*/
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func (file *File) GetName() string {
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return file.Name
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}
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func (file *File) GetSize() uint64 {
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return file.Size
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}
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func (file *File) ModTime() time.Time {
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return file.UpdatedAt
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}
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func (file *File) IsDir() bool {
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return false
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}
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func (file *File) GetPosition() string {
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return file.Position
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}
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