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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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"fmt"
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"path"
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"path/filepath"
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"strings"
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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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// Thumb related metadata
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const (
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ThumbStatusNotExist = ""
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ThumbStatusExist = "exist"
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ThumbStatusNotAvailable = "not_available"
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ThumbStatusMetadataKey = "thumb_status"
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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("Failed to insert file record: %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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} else {
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file.MetadataSerialized = make(map[string]string)
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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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if len(file.MetadataSerialized) > 0 {
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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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return nil
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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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return GetFilesByIDsFromTX(DB, ids, uid)
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}
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func GetFilesByIDsFromTX(tx *gorm.DB, 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 = tx.Where("id in (?)", ids).Find(&files)
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} else {
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result = tx.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. 如果 parents 非空, 则只限制在 parent 包含的目录下搜索
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func GetFilesByKeywords(uid uint, parents []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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if len(parents) > 0 {
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result = result.Where("folder_id in (?)", parents)
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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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// 将所有待检索目录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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if len(files) == 0 {
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return filteredFiles, nil
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}
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// 查询软链接的文件
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filesWithSoftLinks := make([]File, 0)
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for _, file := range files {
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var softLinkFile File
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res := DB.
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Where("source_name = ? and policy_id = ? and id != ?", file.SourceName, file.PolicyID, file.ID).
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First(&softLinkFile)
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if res.Error == nil {
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filesWithSoftLinks = append(filesWithSoftLinks, softLinkFile)
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}
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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 uid > 0 && 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 uid > 0 {
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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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}
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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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if file.MetadataSerialized[ThumbStatusMetadataKey] == ThumbStatusNotAvailable {
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if !strings.EqualFold(filepath.Ext(new), filepath.Ext(file.Name)) {
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// Reset thumb status for new ext name.
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if err := file.resetThumb(); err != nil {
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return err
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}
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}
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}
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return DB.Model(&file).Set("gorm:association_autoupdate", false).Updates(map[string]interface{}{
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"name": new,
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"metadata": file.Metadata,
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}).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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// UpdateMetadata 新增或修改文件的元信息
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func (file *File) UpdateMetadata(data map[string]string) error {
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if file.MetadataSerialized == nil {
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file.MetadataSerialized = make(map[string]string)
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}
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for k, v := range data {
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file.MetadataSerialized[k] = v
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}
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metaValue, err := json.Marshal(&file.MetadataSerialized)
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if err != nil {
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return err
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}
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return DB.Model(&file).Set("gorm:association_autoupdate", false).UpdateColumns(File{Metadata: string(metaValue)}).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 err := file.resetThumb(); err != nil {
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tx.Rollback()
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return err
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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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Updates(map[string]interface{}{
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"size": value,
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"metadata": file.Metadata,
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}); 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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if err := file.resetThumb(); err != nil {
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return err
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}
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return DB.Model(&file).Set("gorm:association_autoupdate", false).Updates(map[string]interface{}{
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"source_name": value,
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"metadata": file.Metadata,
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}).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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// CreateOrGetSourceLink creates a SourceLink model. If the given model exists, the existing
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// model will be returned.
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func (file *File) CreateOrGetSourceLink() (*SourceLink, error) {
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res := &SourceLink{}
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err := DB.Set("gorm:auto_preload", true).Where("file_id = ?", file.ID).Find(&res).Error
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if err == nil && res.ID > 0 {
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return res, nil
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}
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res.FileID = file.ID
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res.Name = file.Name
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if err := DB.Save(res).Error; err != nil {
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return nil, fmt.Errorf("failed to insert SourceLink: %w", err)
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}
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res.File = *file
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return res, nil
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}
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func (file *File) resetThumb() error {
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if _, ok := file.MetadataSerialized[ThumbStatusMetadataKey]; !ok {
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return nil
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}
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delete(file.MetadataSerialized, ThumbStatusMetadataKey)
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metaValue, err := json.Marshal(&file.MetadataSerialized)
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if err != nil {
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return err
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}
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file.Metadata = string(metaValue)
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return err
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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
|
|
|
}
|
|
|
|
|
|
// ShouldLoadThumb returns if file explorer should try to load thumbnail for this file.
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|
|
// `True` does not guarantee the load request will success in next step, but the client
|
|
|
// should try to load and fallback to default placeholder in case error returned.
|
|
|
func (file *File) ShouldLoadThumb() bool {
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|
|
return file.MetadataSerialized[ThumbStatusMetadataKey] != ThumbStatusNotAvailable
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|
|
}
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|
|
// return sidecar thumb file name
|
|
|
func (file *File) ThumbFile() string {
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|
|
return file.SourceName + GetSettingByNameWithDefault("thumb_file_suffix", "._thumb")
|
|
|
}
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